Introduce screen tabs

This is a forward port (by nathans) of Hisham's original code.

Action.c

@@ -58,7 +58,7 @@ Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess)
       header->pl->following = pid;
       unfollow = true;
    }
-   ScreenManager_run(scr, &panelFocus, &ch);
+   ScreenManager_run(scr, &panelFocus, &ch, NULL);
    if (unfollow) {
       header->pl->following = -1;
    }
@@ -85,7 +85,7 @@ Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess)
 static void Action_runSetup(State* st) {
    ScreenManager* scr = ScreenManager_new(st->header, st->settings, st, true);
    CategoriesPanel_new(scr, st->settings, st->header, st->pl);
-   ScreenManager_run(scr, NULL, NULL);
+   ScreenManager_run(scr, NULL, NULL, "Setup");
    ScreenManager_delete(scr);
    if (st->settings->changed) {
       Header_writeBackToSettings(st->header);
@@ -154,7 +154,7 @@ static bool collapseIntoParent(Panel* panel) {
 }
 
 Htop_Reaction Action_setSortKey(Settings* settings, ProcessField sortKey) {
-   Settings_setSortKey(settings, sortKey);
+   ScreenSettings_setSortKey(settings->ss, sortKey);
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_UPDATE_PANELHDR | HTOP_KEEP_FOLLOWING;
 }
 
@@ -164,8 +164,9 @@ static Htop_Reaction actionSetSortColumn(State* st) {
    Htop_Reaction reaction = HTOP_OK;
    Panel* sortPanel = Panel_new(0, 0, 0, 0, Class(ListItem), true, FunctionBar_newEnterEsc("Sort   ", "Cancel "));
    Panel_setHeader(sortPanel, "Sort by");
-   const ProcessField* fields = st->settings->fields;
+   const Settings* settings = st->settings;
-   Hashtable* dynamicColumns = st->settings->dynamicColumns;
+   const ProcessField* fields = settings->ss->fields;
+   Hashtable* dynamicColumns = settings->dynamicColumns;
    for (int i = 0; fields[i]; i++) {
       char* name = NULL;
       if (fields[i] >= LAST_PROCESSFIELD) {
@@ -177,7 +178,7 @@ static Htop_Reaction actionSetSortColumn(State* st) {
          name = String_trim(Process_fields[fields[i]].name);
       }
       Panel_add(sortPanel, (Object*) ListItem_new(name, fields[i]));
-      if (fields[i] == Settings_getActiveSortKey(st->settings))
+      if (fields[i] == ScreenSettings_getActiveSortKey(settings->ss))
          Panel_setSelected(sortPanel, i);
 
       free(name);
@@ -231,16 +232,18 @@ static Htop_Reaction actionToggleMergedCommand(State* st) {
 }
 
 static Htop_Reaction actionToggleTreeView(State* st) {
-   st->settings->treeView = !st->settings->treeView;
+   ScreenSettings* ss = st->settings->ss;
+   ss->treeView = !ss->treeView;
 
-   if (!st->settings->allBranchesCollapsed)
+   if (!ss->allBranchesCollapsed)
       ProcessList_expandTree(st->pl);
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_KEEP_FOLLOWING | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
 
 static Htop_Reaction actionExpandOrCollapseAllBranches(State* st) {
-   st->settings->allBranchesCollapsed = !st->settings->allBranchesCollapsed;
+   ScreenSettings* ss = st->settings->ss;
-   if (st->settings->allBranchesCollapsed)
+   ss->allBranchesCollapsed = !ss->allBranchesCollapsed;
+   if (ss->allBranchesCollapsed)
       ProcessList_collapseAllBranches(st->pl);
    else
       ProcessList_expandTree(st->pl);
@@ -277,7 +280,7 @@ static Htop_Reaction actionLowerPriority(State* st) {
 }
 
 static Htop_Reaction actionInvertSortOrder(State* st) {
-   Settings_invertSortOrder(st->settings);
+   ScreenSettings_invertSortOrder(st->settings->ss);
    if (st->pauseProcessUpdate)
       ProcessList_sort(st->pl);
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS | HTOP_KEEP_FOLLOWING;
@@ -289,7 +292,7 @@ static Htop_Reaction actionExpandOrCollapse(State* st) {
 }
 
 static Htop_Reaction actionCollapseIntoParent(State* st) {
-   if (!st->settings->treeView) {
+   if (!st->settings->ss->treeView) {
       return HTOP_OK;
    }
    bool changed = collapseIntoParent((Panel*)st->mainPanel);
@@ -297,7 +300,46 @@ static Htop_Reaction actionCollapseIntoParent(State* st) {
 }
 
 static Htop_Reaction actionExpandCollapseOrSortColumn(State* st) {
-   return st->settings->treeView ? actionExpandOrCollapse(st) : actionSetSortColumn(st);
+   return st->settings->ss->treeView ? actionExpandOrCollapse(st) : actionSetSortColumn(st);
+}
+
+static Htop_Reaction actionNextScreen(State* st) {
+   Settings* settings = st->settings;
+   settings->ssIndex++;
+   if (settings->ssIndex == settings->nScreens) {
+      settings->ssIndex = 0;
+   }
+   settings->ss = settings->screens[settings->ssIndex];
+   return HTOP_REFRESH;
+}
+
+static Htop_Reaction actionPrevScreen(State* st) {
+   Settings* settings = st->settings;
+   if (settings->ssIndex == 0) {
+      settings->ssIndex = settings->nScreens - 1;
+   } else {
+      settings->ssIndex--;
+   }
+   settings->ss = settings->screens[settings->ssIndex];
+   return HTOP_REFRESH;
+}
+
+Htop_Reaction Action_setScreenTab(Settings* settings, int x) {
+   int s = 2;
+   for (unsigned int i = 0; i < settings->nScreens; i++) {
+      if (x < s) {
+         return 0;
+      }
+      const char* name = settings->screens[i]->name;
+      int len = strlen(name);
+      if (x <= s + len + 1) {
+         settings->ssIndex = i;
+         settings->ss = settings->screens[i];
+         return HTOP_REFRESH;
+      }
+      s += len + 3;
+   }
+   return 0;
 }
 
 static Htop_Reaction actionQuit(ATTR_UNUSED State* st) {
@@ -714,4 +756,6 @@ void Action_setBindings(Htop_Action* keys) {
    keys[KEY_F(10)] = actionQuit;
    keys[KEY_F(18)] = actionExpandCollapseOrSortColumn;
    keys[KEY_RECLICK] = actionExpandOrCollapse;
+   keys[KEY_SHIFT_TAB] = actionPrevScreen;
+   keys['\t'] = actionNextScreen;
 }

Action.h

@@ -57,6 +57,8 @@ bool Action_setUserOnly(const char* userName, uid_t* userId);
 
 Htop_Reaction Action_setSortKey(Settings* settings, ProcessField sortKey);
 
+Htop_Reaction Action_setScreenTab(Settings* settings, int x);
+
 Htop_Reaction Action_follow(State* st);
 
 void Action_setBindings(Htop_Action* keys);

CRT.c

@@ -193,6 +193,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_SOFTIRQ] = ColorPair(Magenta, Black),
       [CPU_STEAL] = ColorPair(Cyan, Black),
       [CPU_GUEST] = ColorPair(Cyan, Black),
+      [PANEL_EDIT] = ColorPair(White, Blue),
+      [SCREENS_OTH_BORDER] = ColorPair(Blue, Blue),
+      [SCREENS_OTH_TEXT] = ColorPair(Black, Blue),
+      [SCREENS_CUR_BORDER] = ColorPair(Green, Green),
+      [SCREENS_CUR_TEXT] = ColorPair(Black, Green),
       [PRESSURE_STALL_THREEHUNDRED] = ColorPair(Cyan, Black),
       [PRESSURE_STALL_SIXTY] = A_BOLD | ColorPair(Cyan, Black),
       [PRESSURE_STALL_TEN] = A_BOLD | ColorPair(White, Black),
@@ -295,6 +300,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_SOFTIRQ] = A_BOLD,
       [CPU_STEAL] = A_DIM,
       [CPU_GUEST] = A_DIM,
+      [PANEL_EDIT] = A_BOLD,
+      [SCREENS_OTH_BORDER] = A_DIM,
+      [SCREENS_OTH_TEXT] = A_DIM,
+      [SCREENS_CUR_BORDER] = A_REVERSE,
+      [SCREENS_CUR_TEXT] = A_REVERSE,
       [PRESSURE_STALL_THREEHUNDRED] = A_DIM,
       [PRESSURE_STALL_SIXTY] = A_NORMAL,
       [PRESSURE_STALL_TEN] = A_BOLD,
@@ -397,6 +407,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_SOFTIRQ] = ColorPair(Blue, White),
       [CPU_STEAL] = ColorPair(Cyan, White),
       [CPU_GUEST] = ColorPair(Cyan, White),
+      [PANEL_EDIT] = ColorPair(White,Blue),
+      [SCREENS_OTH_BORDER] = A_BOLD | ColorPair(Black,White),
+      [SCREENS_OTH_TEXT] = A_BOLD | ColorPair(Black,White),
+      [SCREENS_CUR_BORDER] = ColorPair(Green,Green),
+      [SCREENS_CUR_TEXT] = ColorPair(Black,Green),
       [PRESSURE_STALL_THREEHUNDRED] = ColorPair(Black, White),
       [PRESSURE_STALL_SIXTY] = ColorPair(Black, White),
       [PRESSURE_STALL_TEN] = ColorPair(Black, White),
@@ -499,6 +514,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_SOFTIRQ] = ColorPair(Blue, Black),
       [CPU_STEAL] = ColorPair(Black, Black),
       [CPU_GUEST] = ColorPair(Black, Black),
+      [PANEL_EDIT] = ColorPair(White,Blue),
+      [SCREENS_OTH_BORDER] = ColorPair(Blue,Black),
+      [SCREENS_OTH_TEXT] = ColorPair(Blue,Black),
+      [SCREENS_CUR_BORDER] = ColorPair(Green,Green),
+      [SCREENS_CUR_TEXT] = ColorPair(Black,Green),
       [PRESSURE_STALL_THREEHUNDRED] = ColorPair(Black, Black),
       [PRESSURE_STALL_SIXTY] = ColorPair(Black, Black),
       [PRESSURE_STALL_TEN] = ColorPair(Black, Black),
@@ -601,6 +621,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_SOFTIRQ] = ColorPair(Black, Blue),
       [CPU_STEAL] = ColorPair(White, Blue),
       [CPU_GUEST] = ColorPair(White, Blue),
+      [PANEL_EDIT] = ColorPair(White,Blue),
+      [SCREENS_OTH_BORDER] = A_BOLD | ColorPair(Yellow,Blue),
+      [SCREENS_OTH_TEXT] = ColorPair(Cyan,Blue),
+      [SCREENS_CUR_BORDER] = ColorPair(Cyan,Cyan),
+      [SCREENS_CUR_TEXT] = ColorPair(Black,Cyan),
       [PRESSURE_STALL_THREEHUNDRED] = A_BOLD | ColorPair(Black, Blue),
       [PRESSURE_STALL_SIXTY] = A_NORMAL | ColorPair(White, Blue),
       [PRESSURE_STALL_TEN] = A_BOLD | ColorPair(White, Blue),
@@ -701,6 +726,11 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_SOFTIRQ] = ColorPair(Blue, Black),
       [CPU_STEAL] = ColorPair(Cyan, Black),
       [CPU_GUEST] = ColorPair(Cyan, Black),
+      [PANEL_EDIT] = ColorPair(White,Cyan),
+      [SCREENS_OTH_BORDER] = ColorPair(White,Black),
+      [SCREENS_OTH_TEXT] = ColorPair(Cyan,Black),
+      [SCREENS_CUR_BORDER] = A_BOLD | ColorPair(White,Black),
+      [SCREENS_CUR_TEXT] = A_BOLD | ColorPair(Green,Black),
       [PRESSURE_STALL_THREEHUNDRED] = ColorPair(Green, Black),
       [PRESSURE_STALL_SIXTY] = ColorPair(Green, Black),
       [PRESSURE_STALL_TEN] = A_BOLD | ColorPair(Green, Black),
@@ -725,8 +755,6 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
    [COLORSCHEME_BROKENGRAY] = { 0 } // dynamically generated.
 };
 
-int CRT_cursorX = 0;
-
 int CRT_scrollHAmount = 5;
 
 int CRT_scrollWheelVAmount = 10;
@@ -915,6 +943,7 @@ IGNORE_WCASTQUAL_BEGIN
       define_key("\033[14~", KEY_F(4));
       define_key("\033[14;2~", KEY_F(15));
       define_key("\033[17;2~", KEY_F(18));
+      define_key("\033[Z", KEY_SHIFT_TAB);
       char sequence[3] = "\033a";
       for (char c = 'a'; c <= 'z'; c++) {
          sequence[1] = c;
@@ -925,6 +954,9 @@ IGNORE_WCASTQUAL_END
 #undef define_key
 #endif
    }
+   if (termType && (String_startsWith(termType, "rxvt"))) {
+      define_key("\033[Z", KEY_SHIFT_TAB);
+   }
 
    CRT_installSignalHandlers();
 

CRT.h

@@ -120,6 +120,11 @@ typedef enum ColorElements_ {
    CPU_SOFTIRQ,
    CPU_STEAL,
    CPU_GUEST,
+   PANEL_EDIT,
+   SCREENS_OTH_BORDER,
+   SCREENS_OTH_TEXT,
+   SCREENS_CUR_BORDER,
+   SCREENS_CUR_TEXT,
    PRESSURE_STALL_TEN,
    PRESSURE_STALL_SIXTY,
    PRESSURE_STALL_THREEHUNDRED,
@@ -150,6 +155,7 @@ void CRT_handleSIGSEGV(int signal) ATTR_NORETURN;
 #define KEY_WHEELUP   KEY_F(30)
 #define KEY_WHEELDOWN KEY_F(31)
 #define KEY_RECLICK   KEY_F(32)
+#define KEY_SHIFT_TAB KEY_F(33)
 #define KEY_ALT(x)    (KEY_F(64 - 26) + ((x) - 'A'))
 
 extern const char* CRT_degreeSign;

CategoriesPanel.c

@@ -14,7 +14,6 @@ in the source distribution for its full text.
 #include "AvailableColumnsPanel.h"
 #include "AvailableMetersPanel.h"
 #include "ColorsPanel.h"
-#include "ColumnsPanel.h"
 #include "DisplayOptionsPanel.h"
 #include "FunctionBar.h"
 #include "Header.h"
@@ -25,6 +24,7 @@ in the source distribution for its full text.
 #include "MetersPanel.h"
 #include "Object.h"
 #include "ProvideCurses.h"
+#include "ScreensPanel.h"
 #include "Vector.h"
 #include "XUtils.h"
 
@@ -69,9 +69,11 @@ static void CategoriesPanel_makeColorsPage(CategoriesPanel* this) {
    ScreenManager_add(this->scr, colors, -1);
 }
 
-static void CategoriesPanel_makeColumnsPage(CategoriesPanel* this) {
+static void CategoriesPanel_makeScreensPage(CategoriesPanel* this) {
-   Panel* columns = (Panel*) ColumnsPanel_new(this->settings);
+   Panel* screens = (Panel*) ScreensPanel_new(this->settings);
+   Panel* columns = (Panel*) ((ScreensPanel*)screens)->columns;
    Panel* availableColumns = (Panel*) AvailableColumnsPanel_new(columns, this->settings->dynamicColumns);
+   ScreenManager_add(this->scr, screens, 20);
    ScreenManager_add(this->scr, columns, 20);
    ScreenManager_add(this->scr, availableColumns, -1);
 }
@@ -91,7 +93,7 @@ static const CategoriesPanelPage categoriesPanelPages[] = {
    { .name = "Display options", .ctor = CategoriesPanel_makeDisplayOptionsPage },
    { .name = "Header layout", .ctor = CategoriesPanel_makeHeaderOptionsPage },
    { .name = "Meters", .ctor = CategoriesPanel_makeMetersPage },
-   { .name = "Columns", .ctor = CategoriesPanel_makeColumnsPage },
+   { .name = "Screens", .ctor = CategoriesPanel_makeScreensPage },
    { .name = "Colors", .ctor = CategoriesPanel_makeColorsPage },
 };
 
@@ -157,7 +159,7 @@ CategoriesPanel* CategoriesPanel_new(ScreenManager* scr, Settings* settings, Hea
    this->settings = settings;
    this->header = header;
    this->pl = pl;
-   Panel_setHeader(super, "Setup");
+   Panel_setHeader(super, "Categories");
    for (size_t i = 0; i < ARRAYSIZE(categoriesPanelPages); i++)
       Panel_add(super, (Object*) ListItem_new(categoriesPanelPages[i].name, 0));
 

ColumnsPanel.c

@@ -138,20 +138,26 @@ static void ColumnsPanel_add(Panel* super, unsigned int key, Hashtable* columns)
    Panel_add(super, (Object*) ListItem_new(name, key));
 }
 
-ColumnsPanel* ColumnsPanel_new(Settings* settings) {
+void ColumnsPanel_fill(ColumnsPanel* this, ScreenSettings* ss, Hashtable* columns) {
+   Panel* super = (Panel*) this;
+   Panel_prune(super);
+   for (const ProcessField* fields = ss->fields; *fields; fields++)
+      ColumnsPanel_add(super, *fields, columns);
+   this->ss = ss;
+}
+
+ColumnsPanel* ColumnsPanel_new(ScreenSettings* ss, Hashtable* columns, bool* changed) {
    ColumnsPanel* this = AllocThis(ColumnsPanel);
    Panel* super = (Panel*) this;
    FunctionBar* fuBar = FunctionBar_new(ColumnsFunctions, NULL, NULL);
    Panel_init(super, 1, 1, 1, 1, Class(ListItem), true, fuBar);
 
-   this->settings = settings;
+   this->ss = ss;
+   this->changed = changed;
    this->moving = false;
    Panel_setHeader(super, "Active Columns");
 
-   Hashtable* dynamicColumns = settings->dynamicColumns;
+   ColumnsPanel_fill(this, ss, columns);
-   const ProcessField* fields = settings->fields;
-   for (; *fields; fields++)
-      ColumnsPanel_add(super, *fields, dynamicColumns);
 
    return this;
 }
@@ -159,14 +165,14 @@ ColumnsPanel* ColumnsPanel_new(Settings* settings) {
 void ColumnsPanel_update(Panel* super) {
    ColumnsPanel* this = (ColumnsPanel*) super;
    int size = Panel_size(super);
-   this->settings->changed = true;
+   *(this->changed) = true;
-   this->settings->fields = xRealloc(this->settings->fields, sizeof(ProcessField) * (size + 1));
+   this->ss->fields = xRealloc(this->ss->fields, sizeof(ProcessField) * (size + 1));
-   this->settings->flags = 0;
+   this->ss->flags = 0;
    for (int i = 0; i < size; i++) {
       int key = ((ListItem*) Panel_get(super, i))->key;
-      this->settings->fields[i] = key;
+      this->ss->fields[i] = key;
       if (key < LAST_PROCESSFIELD)
-         this->settings->flags |= Process_fields[key].flags;
+         this->ss->flags |= Process_fields[key].flags;
    }
-   this->settings->fields[size] = 0;
+   this->ss->fields[size] = 0;
 }

ColumnsPanel.h

@@ -15,14 +15,17 @@ in the source distribution for its full text.
 
 typedef struct ColumnsPanel_ {
    Panel super;
+   ScreenSettings* ss;
+   bool* changed;
 
-   Settings* settings;
    bool moving;
 } ColumnsPanel;
 
 extern const PanelClass ColumnsPanel_class;
 
-ColumnsPanel* ColumnsPanel_new(Settings* settings);
+ColumnsPanel* ColumnsPanel_new(ScreenSettings* ss, Hashtable* columns, bool* changed);
+
+void ColumnsPanel_fill(ColumnsPanel* this, ScreenSettings* ss, Hashtable* columns);
 
 void ColumnsPanel_update(Panel* super);
 

CommandLine.c

@@ -328,7 +328,7 @@ int CommandLine_run(const char* name, int argc, char** argv) {
       settings->enableMouse = false;
 #endif
    if (flags.treeView)
-      settings->treeView = true;
+      settings->ss->treeView = true;
    if (flags.highlightChanges)
       settings->highlightChanges = true;
    if (flags.highlightDelaySecs != -1)
@@ -337,9 +337,9 @@ int CommandLine_run(const char* name, int argc, char** argv) {
       // -t -s <key> means "tree sorted by key"
       // -s <key> means "list sorted by key" (previous existing behavior)
       if (!flags.treeView) {
-         settings->treeView = false;
+         settings->ss->treeView = false;
       }
-      Settings_setSortKey(settings, flags.sortKey);
+      ScreenSettings_setSortKey(settings->ss, flags.sortKey);
    }
 
    CRT_init(settings, flags.allowUnicode);
@@ -347,7 +347,7 @@ int CommandLine_run(const char* name, int argc, char** argv) {
    MainPanel* panel = MainPanel_new();
    ProcessList_setPanel(pl, (Panel*) panel);
 
-   MainPanel_updateTreeFunctions(panel, settings->treeView);
+   MainPanel_updateTreeFunctions(panel, settings->ss->treeView);
 
    State state = {
       .settings = settings,
@@ -370,10 +370,10 @@ int CommandLine_run(const char* name, int argc, char** argv) {
    CommandLine_delay(pl, 75);
    ProcessList_scan(pl, false);
 
-   if (settings->allBranchesCollapsed)
+   if (settings->ss->allBranchesCollapsed)
       ProcessList_collapseAllBranches(pl);
 
-   ScreenManager_run(scr, NULL, NULL);
+   ScreenManager_run(scr, NULL, NULL, NULL);
 
    Platform_done();
 

DisplayOptionsPanel.c

@@ -97,9 +97,10 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    this->scr = scr;
 
    Panel_setHeader(super, "Display options");
-   Panel_add(super, (Object*) CheckItem_newByRef("Tree view", &(settings->treeView)));
+   Panel_add(super, (Object*) CheckItem_newByRef("Tree view", &(settings->ss->treeView)));
-   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is always sorted by PID (htop 2 behavior)", &(settings->treeViewAlwaysByPID)));
+   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is always sorted by PID (htop 2 behavior)", &(settings->ss->treeViewAlwaysByPID)));
-   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is collapsed by default", &(settings->allBranchesCollapsed)));
+   Panel_add(super, (Object*) CheckItem_newByRef("- Tree view is collapsed by default", &(settings->ss->allBranchesCollapsed)));
+   Panel_add(super, (Object*) CheckItem_newByRef("Show tabs for screens", &(settings->screenTabs)));
    Panel_add(super, (Object*) CheckItem_newByRef("Shadow other users' processes", &(settings->shadowOtherUsers)));
    Panel_add(super, (Object*) CheckItem_newByRef("Hide kernel threads", &(settings->hideKernelThreads)));
    Panel_add(super, (Object*) CheckItem_newByRef("Hide userland process threads", &(settings->hideUserlandThreads)));

FunctionBar.c

@@ -88,11 +88,12 @@ void FunctionBar_setLabel(FunctionBar* this, int event, const char* text) {
    }
 }
 
-void FunctionBar_draw(const FunctionBar* this) {
+int FunctionBar_draw(const FunctionBar* this) {
-   FunctionBar_drawExtra(this, NULL, -1, false);
+   return FunctionBar_drawExtra(this, NULL, -1, false);
 }
 
-void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor) {
+int FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor) {
+   int cursorX = 0;
    attrset(CRT_colors[FUNCTION_BAR]);
    mvhline(LINES - 1, 0, ' ', COLS);
    int x = 0;
@@ -113,18 +114,20 @@ void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr
       }
       mvaddstr(LINES - 1, x, buffer);
       x += strlen(buffer);
+      cursorX = x;
    }
 
    attrset(CRT_colors[RESET_COLOR]);
 
    if (setCursor) {
-      CRT_cursorX = x;
       curs_set(1);
    } else {
       curs_set(0);
    }
 
    currentLen = x;
+
+   return cursorX;
 }
 
 void FunctionBar_append(const char* buffer, int attr) {

FunctionBar.h

@@ -29,9 +29,9 @@ void FunctionBar_delete(FunctionBar* this);
 
 void FunctionBar_setLabel(FunctionBar* this, int event, const char* text);
 
-void FunctionBar_draw(const FunctionBar* this);
+int FunctionBar_draw(const FunctionBar* this);
 
-void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor);
+int FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor);
 
 void FunctionBar_append(const char* buffer, int attr);
 

Header.c

@@ -283,6 +283,9 @@ int Header_calculateHeight(Header* this) {
       }
       maxHeight = MAXIMUM(maxHeight, height);
    }
+   if (this->settings->screenTabs) {
+      maxHeight++;
+   }
    this->height = maxHeight;
    this->pad = pad;
    return maxHeight;

IncSet.c

@@ -105,10 +105,10 @@ static void updateWeakPanel(const IncSet* this, Panel* panel, Vector* lines) {
    }
 }
 
-static bool search(const IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelValue) {
+static bool search(const IncSet* this, Panel* panel, IncMode_GetPanelValue getPanelValue) {
    int size = Panel_size(panel);
    for (int i = 0; i < size; i++) {
-      if (String_contains_i(getPanelValue(panel, i), mode->buffer)) {
+      if (String_contains_i(getPanelValue(panel, i), this->active->buffer)) {
          Panel_setSelected(panel, i);
          return true;
       }
@@ -117,6 +117,21 @@ static bool search(const IncMode* mode, Panel* panel, IncMode_GetPanelValue getP
    return false;
 }
 
+void IncSet_activate(IncSet* this, IncType type, Panel* panel) {
+   this->active = &(this->modes[type]);
+   panel->currentBar = this->active->bar;
+   panel->cursorOn = true;
+   this->panel = panel;
+   IncSet_drawBar(this, CRT_colors[FUNCTION_BAR]);
+}
+
+static void IncSet_deactivate(IncSet* this, Panel* panel) {
+   this->active = NULL;
+   Panel_setDefaultBar(panel);
+   panel->cursorOn = false;
+   FunctionBar_draw(this->defaultBar);
+}
+
 static bool IncMode_find(const IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelValue, int step) {
    int size = Panel_size(panel);
    int here = Panel_getSelectedIndex(panel);
@@ -194,12 +209,11 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
             IncMode_reset(mode);
          }
       }
-      this->active = NULL;
+      IncSet_deactivate(this, panel);
-      Panel_setDefaultBar(panel);
       doSearch = false;
    }
    if (doSearch) {
-      this->found = search(mode, panel, getPanelValue);
+      this->found = search(this, panel, getPanelValue);
    }
    if (filterChanged && lines) {
       updateWeakPanel(this, panel, lines);
@@ -212,14 +226,13 @@ const char* IncSet_getListItemValue(Panel* panel, int i) {
    return l ? l->value : "";
 }
 
-void IncSet_activate(IncSet* this, IncType type, Panel* panel) {
+void IncSet_drawBar(const IncSet* this, int attr) {
-   this->active = &(this->modes[type]);
-   panel->currentBar = this->active->bar;
-}
-
-void IncSet_drawBar(const IncSet* this) {
    if (this->active) {
-      FunctionBar_drawExtra(this->active->bar, this->active->buffer, (this->active->isFilter || this->found) ? -1 : CRT_colors[FAILED_SEARCH], true);
+      if (!this->active->isFilter && !this->found)
+         attr = CRT_colors[FAILED_SEARCH];
+      int cursorX = FunctionBar_drawExtra(this->active->bar, this->active->buffer, attr, true);
+      this->panel->cursorY = LINES - 1;
+      this->panel->cursorX = cursorX;
    } else {
       FunctionBar_draw(this->defaultBar);
    }

IncSet.h

@@ -32,6 +32,7 @@ typedef struct IncMode_ {
 typedef struct IncSet_ {
    IncMode modes[2];
    IncMode* active;
+   Panel* panel;
    FunctionBar* defaultBar;
    bool filtering;
    bool found;
@@ -57,7 +58,7 @@ const char* IncSet_getListItemValue(Panel* panel, int i);
 
 void IncSet_activate(IncSet* this, IncType type, Panel* panel);
 
-void IncSet_drawBar(const IncSet* this);
+void IncSet_drawBar(const IncSet* this, int attr);
 
 int IncSet_synthesizeEvent(IncSet* this, int x);
 

InfoScreen.c

@@ -57,7 +57,7 @@ void InfoScreen_drawTitled(InfoScreen* this, const char* fmt, ...) {
    attrset(CRT_colors[DEFAULT_COLOR]);
    Panel_draw(this->display, true, true, true, false);
 
-   IncSet_drawBar(this->inc);
+   IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
 }
 
 void InfoScreen_addLine(InfoScreen* this, const char* line) {
@@ -89,15 +89,9 @@ void InfoScreen_run(InfoScreen* this) {
    while (looping) {
 
       Panel_draw(panel, false, true, true, false);
-      IncSet_drawBar(this->inc);
+      IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
 
-      if (this->inc->active) {
+      int ch = Panel_getCh(panel);
-         (void) move(LINES - 1, CRT_cursorX);
-      }
-#ifdef HAVE_SET_ESCDELAY
-      set_escdelay(25);
-#endif
-      int ch = getch();
 
       if (ch == ERR) {
          if (As_InfoScreen(this)->onErr) {

ListItem.c

@@ -18,13 +18,13 @@ in the source distribution for its full text.
 #include "XUtils.h"
 
 
-static void ListItem_delete(Object* cast) {
+void ListItem_delete(Object* cast) {
    ListItem* this = (ListItem*)cast;
    free(this->value);
    free(this);
 }
 
-static void ListItem_display(const Object* cast, RichString* out) {
+void ListItem_display(const Object* cast, RichString* out) {
    const ListItem* const this = (const ListItem*)cast;
    assert (this != NULL);
 
@@ -38,11 +38,15 @@ static void ListItem_display(const Object* cast, RichString* out) {
    RichString_appendWide(out, CRT_colors[DEFAULT_COLOR], this->value);
 }
 
-ListItem* ListItem_new(const char* value, int key) {
+void ListItem_init(ListItem* this, const char* value, int key) {
-   ListItem* this = AllocThis(ListItem);
    this->value = xStrdup(value);
    this->key = key;
    this->moving = false;
+}
+
+ListItem* ListItem_new(const char* value, int key) {
+   ListItem* this = AllocThis(ListItem);
+   ListItem_init(this, value, key);
    return this;
 }
 
@@ -55,7 +59,7 @@ void ListItem_append(ListItem* this, const char* text) {
    this->value[newLen] = '\0';
 }
 
-static int ListItem_compare(const void* cast1, const void* cast2) {
+int ListItem_compare(const void* cast1, const void* cast2) {
    const ListItem* obj1 = (const ListItem*) cast1;
    const ListItem* obj2 = (const ListItem*) cast2;
    return strcmp(obj1->value, obj2->value);

ListItem.h

@@ -21,10 +21,18 @@ typedef struct ListItem_ {
 
 extern const ObjectClass ListItem_class;
 
+void ListItem_delete(Object* cast);
+
+void ListItem_display(const Object* cast, RichString* out);
+
+void ListItem_init(ListItem* this, const char* value, int key);
+
 ListItem* ListItem_new(const char* value, int key);
 
 void ListItem_append(ListItem* this, const char* text);
 
+int ListItem_compare(const void* cast1, const void* cast2);
+
 static inline const char* ListItem_getRef(const ListItem* this) {
    return this->value;
 }

MainPanel.c

@@ -71,23 +71,29 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    if (needReset)
       this->state->hideProcessSelection = false;
 
+   Settings* settings = this->state->settings;
+   ScreenSettings* ss = settings->ss;
+
    if (EVENT_IS_HEADER_CLICK(ch)) {
       int x = EVENT_HEADER_CLICK_GET_X(ch);
       const ProcessList* pl = this->state->pl;
-      Settings* settings = this->state->settings;
       int hx = super->scrollH + x + 1;
       ProcessField field = ProcessList_keyAt(pl, hx);
-      if (settings->treeView && settings->treeViewAlwaysByPID) {
+      if (ss->treeView && ss->treeViewAlwaysByPID) {
-         settings->treeView = false;
+         ss->treeView = false;
-         settings->direction = 1;
+         ss->direction = 1;
          reaction |= Action_setSortKey(settings, field);
-      } else if (field == Settings_getActiveSortKey(settings)) {
+      } else if (field == ScreenSettings_getActiveSortKey(ss)) {
-         Settings_invertSortOrder(settings);
+         ScreenSettings_invertSortOrder(ss);
       } else {
          reaction |= Action_setSortKey(settings, field);
       }
       reaction |= HTOP_RECALCULATE | HTOP_REDRAW_BAR | HTOP_SAVE_SETTINGS;
       result = HANDLED;
+   } else if (EVENT_IS_SCREEN_TAB_CLICK(ch)) {
+      int x = EVENT_SCREEN_TAB_GET_X(ch);
+      reaction |= Action_setScreenTab(settings, x);
+      result = HANDLED;
    } else if (ch != ERR && this->inc->active) {
       bool filterChanged = IncSet_handleKey(this->inc, ch, super, MainPanel_getValue, NULL);
       if (filterChanged) {
@@ -116,7 +122,7 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    }
 
    if (reaction & HTOP_REDRAW_BAR) {
-      MainPanel_updateTreeFunctions(this, this->state->settings->treeView);
+      MainPanel_updateTreeFunctions(this, settings->ss->treeView);
    }
    if (reaction & HTOP_RESIZE) {
       result |= RESIZE;
@@ -182,7 +188,7 @@ static void MainPanel_drawFunctionBar(Panel* super, bool hideFunctionBar) {
    if (hideFunctionBar && !this->inc->active)
       return;
 
-   IncSet_drawBar(this->inc);
+   IncSet_drawBar(this->inc, CRT_colors[FUNCTION_BAR]);
    if (this->state->pauseProcessUpdate) {
       FunctionBar_append("PAUSED", CRT_colors[PAUSED]);
    }

Makefile.am

@@ -74,6 +74,7 @@ myhtopsources = \
 	ProcessLocksScreen.c \
 	RichString.c \
 	ScreenManager.c \
+	ScreensPanel.c \
 	Settings.c \
 	SignalsPanel.c \
 	SwapMeter.c \
@@ -135,6 +136,7 @@ myhtopheaders = \
 	ProvideCurses.h \
 	RichString.h \
 	ScreenManager.h \
+	ScreensPanel.h \
 	Settings.h \
 	SignalsPanel.h \
 	SwapMeter.h \

Panel.c

@@ -49,6 +49,8 @@ void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type
    this->y = y;
    this->w = w;
    this->h = h;
+   this->cursorX = 0;
+   this->cursorY = 0;
    this->eventHandlerState = NULL;
    this->items = Vector_new(type, owner, DEFAULT_SIZE);
    this->scrollV = 0;
@@ -72,6 +74,11 @@ void Panel_done(Panel* this) {
    RichString_delete(&this->header);
 }
 
+void Panel_setCursorToSelection(Panel* this) {
+   this->cursorY = this->y + this->selected - this->scrollV + 1;
+   this->cursorX = this->x + this->selectedLen - this->scrollH;
+}
+
 void Panel_setSelectionColor(Panel* this, ColorElements colorId) {
    this->selectionColorId = colorId;
 }
@@ -330,7 +337,6 @@ void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelect
    this->oldSelected = this->selected;
    this->wasFocus = focus;
    this->needsRedraw = false;
-   move(0, 0);
 }
 
 static int Panel_headerHeight(const Panel* this) {
@@ -485,3 +491,16 @@ HandlerResult Panel_selectByTyping(Panel* this, int ch) {
 
    return IGNORED;
 }
+
+int Panel_getCh(Panel* this) {
+   if (this->cursorOn) {
+      move(this->cursorY, this->cursorX);
+      curs_set(1);
+   } else {
+      curs_set(0);
+   }
+#ifdef HAVE_SET_ESCDELAY
+   set_escdelay(25);
+#endif
+   return getch();
+}

Panel.h

@@ -39,6 +39,10 @@ typedef enum HandlerResult_ {
 #define EVENT_IS_HEADER_CLICK(ev_) ((ev_) >= -10000 && (ev_) <= -9000)
 #define EVENT_HEADER_CLICK_GET_X(ev_) ((ev_) + 10000)
 
+#define EVENT_SCREEN_TAB_CLICK(x_) (-20000 + (x_))
+#define EVENT_IS_SCREEN_TAB_CLICK(ev_) ((ev_) >= -20000 && (ev_) < -10000)
+#define EVENT_SCREEN_TAB_GET_X(ev_) ((ev_) + 20000)
+
 typedef HandlerResult (*Panel_EventHandler)(Panel*, int);
 typedef void (*Panel_DrawFunctionBar)(Panel*, bool);
 typedef void (*Panel_PrintHeader)(Panel*);
@@ -61,6 +65,7 @@ typedef struct PanelClass_ {
 struct Panel_ {
    Object super;
    int x, y, w, h;
+   int cursorX, cursorY;
    Vector* items;
    int selected;
    int oldSelected;
@@ -69,6 +74,7 @@ struct Panel_ {
    int scrollV;
    int scrollH;
    bool needsRedraw;
+   bool cursorOn;
    bool wasFocus;
    FunctionBar* currentBar;
    FunctionBar* defaultBar;
@@ -90,6 +96,8 @@ void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type
 
 void Panel_done(Panel* this);
 
+void Panel_setCursorToSelection(Panel* this);
+
 void Panel_setSelectionColor(Panel* this, ColorElements colorId);
 
 void Panel_setHeader(Panel* this, const char* header);
@@ -130,4 +138,6 @@ bool Panel_onKey(Panel* this, int key);
 
 HandlerResult Panel_selectByTyping(Panel* this, int ch);
 
+int Panel_getCh(Panel* this);
+
 #endif

Process.c

@@ -784,7 +784,8 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
          attr = CRT_colors[PROCESS_THREAD];
          baseattr = CRT_colors[PROCESS_THREAD_BASENAME];
       }
-      if (!this->settings->treeView || this->indent == 0) {
+      const ScreenSettings* ss = this->settings->ss;
+      if (!ss->treeView || this->indent == 0) {
          Process_writeCommand(this, attr, baseattr, str);
          return;
       }
@@ -974,7 +975,7 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
 
 void Process_display(const Object* cast, RichString* out) {
    const Process* this = (const Process*) cast;
-   const ProcessField* fields = this->settings->fields;
+   const ProcessField* fields = this->settings->ss->fields;
    for (int i = 0; fields[i]; i++)
       As_Process(this)->writeField(this, out, fields[i]);
 
@@ -1092,8 +1093,9 @@ int Process_compare(const void* v1, const void* v2) {
    const Process* p2 = (const Process*)v2;
 
    const Settings* settings = p1->settings;
+   const ScreenSettings* ss = settings->ss;
 
-   ProcessField key = Settings_getActiveSortKey(settings);
+   ProcessField key = ScreenSettings_getActiveSortKey(ss);
 
    int result = Process_compareByKey(p1, p2, key);
 
@@ -1101,7 +1103,7 @@ int Process_compare(const void* v1, const void* v2) {
    if (!result)
       return SPACESHIP_NUMBER(p1->pid, p2->pid);
 
-   return (Settings_getActiveDirection(settings) == 1) ? result : -result;
+   return (ScreenSettings_getActiveDirection(ss) == 1) ? result : -result;
 }
 
 int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField key) {

ProcessList.c

@@ -124,13 +124,14 @@ void ProcessList_printHeader(const ProcessList* this, RichString* header) {
    RichString_rewind(header, RichString_size(header));
 
    const Settings* settings = this->settings;
-   const ProcessField* fields = settings->fields;
+   const ScreenSettings* ss = settings->ss;
+   const ProcessField* fields = ss->fields;
 
-   ProcessField key = Settings_getActiveSortKey(settings);
+   ProcessField key = ScreenSettings_getActiveSortKey(ss);
 
    for (int i = 0; fields[i]; i++) {
       int color;
-      if (settings->treeView && settings->treeViewAlwaysByPID) {
+      if (ss->treeView && ss->treeViewAlwaysByPID) {
          color = CRT_colors[PANEL_HEADER_FOCUS];
       } else if (key == fields[i]) {
          color = CRT_colors[PANEL_SELECTION_FOCUS];
@@ -140,10 +141,11 @@ void ProcessList_printHeader(const ProcessList* this, RichString* header) {
 
       RichString_appendWide(header, color, alignedProcessFieldTitle(this, fields[i]));
       if (key == fields[i] && RichString_getCharVal(*header, RichString_size(header) - 1) == ' ') {
+         bool ascending = ScreenSettings_getActiveDirection(ss) == 1;
          RichString_rewind(header, 1);  // rewind to override space
          RichString_appendnWide(header,
                                 CRT_colors[PANEL_SELECTION_FOCUS],
-                                CRT_treeStr[Settings_getActiveDirection(this->settings) == 1 ? TREE_STR_ASC : TREE_STR_DESC],
+                                CRT_treeStr[ascending ? TREE_STR_ASC : TREE_STR_DESC],
                                 1);
       }
       if (COMM == fields[i] && settings->showMergedCommand) {
@@ -402,7 +404,7 @@ static int ProcessList_treeProcessCompareByPID(const void* v1, const void* v2) {
 static void ProcessList_buildTree(ProcessList* this) {
    int node_counter = 1;
    int node_index = 0;
-   int direction = Settings_getActiveDirection(this->settings);
+   int direction = ScreenSettings_getActiveDirection(this->settings->ss);
 
    // Sort by PID
    Vector_quickSortCustomCompare(this->processes, ProcessList_treeProcessCompareByPID);
@@ -488,7 +490,7 @@ static void ProcessList_buildTree(ProcessList* this) {
 }
 
 void ProcessList_sort(ProcessList* this) {
-   if (this->settings->treeView) {
+   if (this->settings->ss->treeView) {
       ProcessList_updateTreeSet(this);
       Vector_quickSortCustomCompare(this->processes, ProcessList_treeProcessCompare);
    } else {
@@ -498,7 +500,7 @@ void ProcessList_sort(ProcessList* this) {
 
 ProcessField ProcessList_keyAt(const ProcessList* this, int at) {
    int x = 0;
-   const ProcessField* fields = this->settings->fields;
+   const ProcessField* fields = this->settings->ss->fields;
    ProcessField field;
    for (int i = 0; (field = fields[i]); i++) {
       int len = strlen(alignedProcessFieldTitle(this, field));
@@ -661,7 +663,7 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
    // Set UID column width based on max UID.
    Process_setUidColumnWidth(maxUid);
 
-   if (this->settings->treeView) {
+   if (this->settings->ss->treeView) {
       // Clear out the hashtable to avoid any left-over processes from previous build
       //
       // The sorting algorithm relies on the fact that

ScreenManager.c

@@ -49,27 +49,43 @@ inline int ScreenManager_size(const ScreenManager* this) {
 }
 
 void ScreenManager_add(ScreenManager* this, Panel* item, int size) {
+   ScreenManager_insert(this, item, size, Vector_size(this->panels));
+}
+
+void ScreenManager_insert(ScreenManager* this, Panel* item, int size, int idx) {
    int lastX = 0;
-   if (this->panelCount > 0) {
+   if (idx > 0) {
-      const Panel* last = (const Panel*) Vector_get(this->panels, this->panelCount - 1);
+      const Panel* last = (const Panel*) Vector_get(this->panels, idx - 1);
       lastX = last->x + last->w + 1;
    }
    int height = LINES - this->y1 - (this->header ? this->header->height : 0) + this->y2;
-   if (size > 0) {
+   if (size <= 0) {
-      Panel_resize(item, size, height);
+      size = COLS - this->x1 + this->x2 - lastX;
-   } else {
-      Panel_resize(item, COLS - this->x1 + this->x2 - lastX, height);
    }
+   Panel_resize(item, size, height);
    Panel_move(item, lastX, this->y1 + (this->header ? this->header->height : 0));
-   Vector_add(this->panels, item);
+   if (idx < this->panelCount) {
+      for (int i =  idx + 1; i <= this->panelCount; i++) {
+         Panel* p = (Panel*) Vector_get(this->panels, i);
+         Panel_move(p, p->x + size, p->y);
+      }
+   }
+   Vector_insert(this->panels, idx, item);
    item->needsRedraw = true;
    this->panelCount++;
 }
 
 Panel* ScreenManager_remove(ScreenManager* this, int idx) {
    assert(this->panelCount > idx);
+   int w = ((Panel*) Vector_get(this->panels, idx))->w;
    Panel* panel = (Panel*) Vector_remove(this->panels, idx);
    this->panelCount--;
+   if (idx < this->panelCount) {
+      for (int i = idx; i < this->panelCount; i++) {
+         Panel* p = (Panel*) Vector_get(this->panels, i);
+         Panel_move(p, p->x - w, p->y);
+      }
+   }
    return panel;
 }
 
@@ -108,7 +124,7 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
       ProcessList_scan(pl, this->state->pauseProcessUpdate);
       // always update header, especially to avoid gaps in graph meters
       Header_updateData(this->header);
-      if (!this->state->pauseProcessUpdate && (*sortTimeout == 0 || this->settings->treeView)) {
+      if (!this->state->pauseProcessUpdate && (*sortTimeout == 0 || this->settings->ss->treeView)) {
          ProcessList_sort(pl);
          *sortTimeout = 1;
       }
@@ -125,7 +141,53 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
    *rescan = false;
 }
 
+static inline bool drawTab(int* y, int* x, int l, const char* name, bool cur) {
+   attrset(CRT_colors[cur ? SCREENS_CUR_BORDER : SCREENS_OTH_BORDER]);
+   mvaddch(*y, *x, '[');
+   (*x)++;
+   if (*x >= l)
+      return false;
+   int nameLen = strlen(name);
+   int n = MINIMUM(l - *x, nameLen);
+   attrset(CRT_colors[cur ? SCREENS_CUR_TEXT : SCREENS_OTH_TEXT]);
+   mvaddnstr(*y, *x, name, n);
+   *x += n;
+   if (*x >= l)
+      return false;
+   attrset(CRT_colors[cur ? SCREENS_CUR_BORDER : SCREENS_OTH_BORDER]);
+   mvaddch(*y, *x, ']');
+   *x += 2;
+   if (*x >= l)
+      return false;
+   return true;
+}
+
+static void ScreenManager_drawScreenTabs(ScreenManager* this) {
+   ScreenSettings** screens = this->settings->screens;
+   int cur = this->settings->ssIndex;
+   int l = COLS;
+   Panel* panel = (Panel*) Vector_get(this->panels, 0);
+   int y = panel->y - 1;
+   int x = 2;
+
+   if (this->name) {
+      drawTab(&y, &x, l, this->name, true);
+      return;
+   }
+
+   for (int s = 0; screens[s]; s++) {
+      bool ok = drawTab(&y, &x, l, screens[s]->name, s == cur);
+      if (!ok) {
+         break;
+      }
+   }
+   attrset(CRT_colors[RESET_COLOR]);
+}
+
 static void ScreenManager_drawPanels(ScreenManager* this, int focus, bool force_redraw) {
+   if (this->settings->screenTabs) {
+      ScreenManager_drawScreenTabs(this);
+   }
    const int nPanels = this->panelCount;
    for (int i = 0; i < nPanels; i++) {
       Panel* panel = (Panel*) Vector_get(this->panels, i);
@@ -138,7 +200,7 @@ static void ScreenManager_drawPanels(ScreenManager* this, int focus, bool force_
    }
 }
 
-void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
+void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey, const char* name) {
    bool quit = false;
    int focus = 0;
 
@@ -156,6 +218,8 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
    int sortTimeout = 0;
    int resetSortTimeout = 5;
 
+   this->name = name;
+
    while (!quit) {
       if (this->header) {
          checkRecalculation(this, &oldTime, &sortTimeout, &redraw, &rescan, &timedOut, &force_redraw);
@@ -167,10 +231,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
       }
 
       int prevCh = ch;
-#ifdef HAVE_SET_ESCDELAY
+      ch = Panel_getCh(panelFocus);
-      set_escdelay(25);
-#endif
-      ch = getch();
 
       HandlerResult result = IGNORED;
 #ifdef HAVE_GETMOUSE
@@ -189,6 +250,9 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
                         if (mevent.y == panel->y) {
                            ch = EVENT_HEADER_CLICK(mevent.x - panel->x);
                            break;
+                        } else if (this->settings->screenTabs && mevent.y == panel->y - 1) {
+                           ch = EVENT_SCREEN_TAB_CLICK(mevent.x);
+                           break;
                         } else if (mevent.y > panel->y && mevent.y <= panel->y + panel->h) {
                            ch = KEY_MOUSE;
                            if (panel == panelFocus || this->allowFocusChange) {

ScreenManager.h

@@ -22,6 +22,7 @@ typedef struct ScreenManager_ {
    int x2;
    int y2;
    Vector* panels;
+   const char* name;
    int panelCount;
    Header* header;
    const Settings* settings;
@@ -37,10 +38,12 @@ int ScreenManager_size(const ScreenManager* this);
 
 void ScreenManager_add(ScreenManager* this, Panel* item, int size);
 
+void ScreenManager_insert(ScreenManager* this, Panel* item, int size, int idx);
+
 Panel* ScreenManager_remove(ScreenManager* this, int idx);
 
 void ScreenManager_resize(ScreenManager* this);
 
-void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey);
+void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey, const char* name);
 
 #endif

ScreensPanel.c

@@ -0,0 +1,308 @@
+/*
+htop - ScreensPanel.c
+(C) 2004-2011 Hisham H. Muhammad
+Released under the GNU GPL, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "ScreensPanel.h"
+#include "Platform.h"
+
+#include "CRT.h"
+#include "XUtils.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+
+
+ObjectClass ScreenListItem_class = {
+   .extends = Class(ListItem),
+   .display = ListItem_display,
+   .delete = ListItem_delete,
+   .compare = ListItem_compare
+};
+
+ScreenListItem* ScreenListItem_new(const char* value, ScreenSettings* ss) {
+   ScreenListItem* this = AllocThis(ScreenListItem);
+   ListItem_init((ListItem*)this, value, 0);
+   this->ss = ss;
+   return this;
+}
+
+static const char* const ScreensFunctions[] = {"      ", "Rename", "      ", "      ", "New   ", "      ", "MoveUp", "MoveDn", "Remove", "Done  ", NULL};
+
+static void ScreensPanel_delete(Object* object) {
+   Panel* super = (Panel*) object;
+   ScreensPanel* this = (ScreensPanel*) object;
+   Panel_done(super);
+   free(this);
+}
+
+static HandlerResult ScreensPanel_eventHandlerRenaming(Panel* super, int ch) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   if (ch >= 32 && ch < 127 && ch != 61) {
+      if (this->cursor < SCREEN_NAME_LEN - 1) {
+         this->buffer[this->cursor] = ch;
+         this->cursor++;
+         super->selectedLen = strlen(this->buffer);
+         Panel_setCursorToSelection(super);
+      }
+   } else {
+      switch(ch) {
+         case 127:
+         case KEY_BACKSPACE:
+         {
+            if (this->cursor > 0) {
+               this->cursor--;
+               this->buffer[this->cursor] = '\0';
+               super->selectedLen = strlen(this->buffer);
+               Panel_setCursorToSelection(super);
+            }
+            break;
+         }
+         case 0x0a:
+         case 0x0d:
+         case KEY_ENTER:
+         {
+            ListItem* item = (ListItem*) Panel_getSelected(super);
+            if (!item)
+               break;
+            free(this->saved);
+            item->value = xStrdup(this->buffer);
+            this->renaming = false;
+            super->cursorOn = false;
+            Panel_setSelectionColor(super, CRT_colors[PANEL_SELECTION_FOCUS]);
+            ScreensPanel_update(super);
+            break;
+         }
+         case 27: // Esc
+         {
+            ListItem* item = (ListItem*) Panel_getSelected(super);
+            if (!item)
+               break;
+            item->value = this->saved;
+            this->renaming = false;
+            super->cursorOn = false;
+            Panel_setSelectionColor(super, CRT_colors[PANEL_SELECTION_FOCUS]);
+            break;
+         }
+      }
+   }
+   return HANDLED;
+}
+
+static void startRenaming(Panel* super) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   ListItem* item = (ListItem*) Panel_getSelected(super);
+   if (item == NULL)
+      return;
+   this->renaming = true;
+   super->cursorOn = true;
+   char* name = item->value;
+   this->saved = name;
+   strncpy(this->buffer, name, SCREEN_NAME_LEN);
+   this->buffer[SCREEN_NAME_LEN] = '\0';
+   this->cursor = strlen(this->buffer);
+   item->value = this->buffer;
+   Panel_setSelectionColor(super, CRT_colors[PANEL_EDIT]);
+   super->selectedLen = strlen(this->buffer);
+   Panel_setCursorToSelection(super);
+}
+
+static void rebuildSettingsArray(Panel* super) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   int n = Panel_size(super);
+   free(this->settings->screens);
+   this->settings->screens = xMalloc(sizeof(ScreenSettings*) * (n + 1));
+   this->settings->screens[n] = NULL;
+   for (int i = 0; i < n; i++) {
+      ScreenListItem* item = (ScreenListItem*) Panel_get(super, i);
+      this->settings->screens[i] = item->ss;
+   }
+   this->settings->nScreens = n;
+}
+
+static void addNewScreen(Panel* super) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   const char* name = "New";
+   ScreenSettings* ss = Settings_newScreen(this->settings, name, "PID Command");
+   ScreenListItem* item = ScreenListItem_new(name, ss);
+   int idx = Panel_getSelectedIndex(super);
+   Panel_insert(super, idx + 1, (Object*) item);
+   Panel_setSelected(super, idx + 1);
+}
+
+static HandlerResult ScreensPanel_eventHandlerNormal(Panel* super, int ch) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   int selected = Panel_getSelectedIndex(super);
+   ScreenListItem* oldFocus = (ScreenListItem*) Panel_getSelected(super);
+   bool shouldRebuildArray = false;
+   HandlerResult result = IGNORED;
+   switch(ch) {
+      case 0x0a:
+      case 0x0d:
+      case KEY_ENTER:
+      case KEY_MOUSE:
+      case KEY_RECLICK:
+      {
+         this->moving = !(this->moving);
+         Panel_setSelectionColor(super, this->moving ? CRT_colors[PANEL_SELECTION_FOLLOW] : CRT_colors[PANEL_SELECTION_FOCUS]);
+         ListItem* item = (ListItem*) Panel_getSelected(super);
+         if (item)
+            item->moving = this->moving;
+         result = HANDLED;
+         break;
+      }
+      case EVENT_SET_SELECTED:
+         result = HANDLED;
+         break;
+      case KEY_NPAGE:
+      case KEY_PPAGE:
+      case KEY_HOME:
+      case KEY_END: {
+         Panel_onKey(super, ch);
+         break;
+      }
+      case KEY_F(2):
+      case KEY_CTRL('R'):
+      {
+         startRenaming(super);
+         result = HANDLED;
+         break;
+      }
+      case KEY_F(5):
+      case KEY_CTRL('N'):
+      {
+         addNewScreen(super);
+         startRenaming(super);
+         shouldRebuildArray = true;
+         result = HANDLED;
+         break;
+      }
+      case KEY_UP:
+      {
+         if (!this->moving) {
+            Panel_onKey(super, ch);
+            break;
+         }
+         /* else fallthrough */
+      } /* FALLTHRU */
+      case KEY_F(7):
+      case '[':
+      case '-':
+      {
+         Panel_moveSelectedUp(super);
+         shouldRebuildArray = true;
+         result = HANDLED;
+         break;
+      }
+      case KEY_DOWN:
+      {
+         if (!this->moving) {
+            Panel_onKey(super, ch);
+            break;
+         }
+         /* else fallthrough */
+      } /* FALLTHRU */
+      case KEY_F(8):
+      case ']':
+      case '+':
+      {
+         Panel_moveSelectedDown(super);
+         shouldRebuildArray = true;
+         result = HANDLED;
+         break;
+      }
+      case KEY_F(9):
+      //case KEY_DC:
+      {
+         if (Panel_size(super) > 1) {
+            Panel_remove(super, selected);
+         }
+         shouldRebuildArray = true;
+         result = HANDLED;
+         break;
+      }
+      default:
+      {
+         if (ch < 255 && isalpha(ch))
+            result = Panel_selectByTyping(super, ch);
+         if (result == BREAK_LOOP)
+            result = IGNORED;
+         break;
+      }
+   }
+   ScreenListItem* newFocus = (ScreenListItem*) Panel_getSelected(super);
+   if (newFocus && oldFocus != newFocus) {
+      ColumnsPanel_fill(this->columns, newFocus->ss, this->settings->dynamicColumns);
+      result = HANDLED;
+   }
+   if (shouldRebuildArray)
+      rebuildSettingsArray(super);
+   if (result == HANDLED)
+      ScreensPanel_update(super);
+   return result;
+}
+
+static HandlerResult ScreensPanel_eventHandler(Panel* super, int ch) {
+   ScreensPanel* const this = (ScreensPanel*) super;
+
+   if (this->renaming) {
+      return ScreensPanel_eventHandlerRenaming(super, ch);
+   } else {
+      return ScreensPanel_eventHandlerNormal(super, ch);
+   }
+}
+
+PanelClass ScreensPanel_class = {
+   .super = {
+      .extends = Class(Panel),
+      .delete = ScreensPanel_delete
+   },
+   .eventHandler = ScreensPanel_eventHandler
+};
+
+ScreensPanel* ScreensPanel_new(Settings* settings) {
+   ScreensPanel* this = AllocThis(ScreensPanel);
+   Panel* super = (Panel*) this;
+   Hashtable* columns = settings->dynamicColumns;
+   FunctionBar* fuBar = FunctionBar_new(ScreensFunctions, NULL, NULL);
+   Panel_init(super, 1, 1, 1, 1, Class(ListItem), true, fuBar);
+
+   this->settings = settings;
+   this->columns = ColumnsPanel_new(settings->screens[0], columns, &(settings->changed));
+   this->moving = false;
+   this->renaming = false;
+   super->cursorOn = false;
+   this->cursor = 0;
+   Panel_setHeader(super, "Screens");
+
+   for (unsigned int i = 0; i < settings->nScreens; i++) {
+      ScreenSettings* ss = settings->screens[i];
+      char* name = ss->name;
+      Panel_add(super, (Object*) ScreenListItem_new(name, ss));
+   }
+   return this;
+}
+
+void ScreensPanel_update(Panel* super) {
+   ScreensPanel* this = (ScreensPanel*) super;
+   int size = Panel_size(super);
+   this->settings->changed = true;
+   this->settings->screens = xRealloc(this->settings->screens, sizeof(char*) * (size+1));
+   for (int i = 0; i < size; i++) {
+      ScreenListItem* item = (ScreenListItem*) Panel_get(super, i);
+      ScreenSettings* ss = item->ss;
+      free(ss->name);
+      this->settings->screens[i] = ss;
+      ss->name = xStrdup(((ListItem*) item)->value);
+   }
+   this->settings->screens[size] = NULL;
+}

ScreensPanel.h

@@ -0,0 +1,49 @@
+#ifndef HEADER_ScreensPanel
+#define HEADER_ScreensPanel
+/*
+htop - ScreensPanel.h
+(C) 2004-2011 Hisham H. Muhammad
+Released under the GNU GPL, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "Panel.h"
+#include "ScreenManager.h"
+#include "ColumnsPanel.h"
+#include "Settings.h"
+#include "ListItem.h"
+
+#ifndef SCREEN_NAME_LEN
+#define SCREEN_NAME_LEN 20
+#endif
+
+typedef struct ScreensPanel_ {
+   Panel super;
+
+   ScreenManager* scr;
+   Settings* settings;
+   ColumnsPanel* columns;
+   char buffer[SCREEN_NAME_LEN + 1];
+   char* saved;
+   int cursor;
+   bool moving;
+   bool renaming;
+} ScreensPanel;
+
+typedef struct ScreenListItem_ {
+   ListItem super;
+   ScreenSettings* ss;
+} ScreenListItem;
+
+
+extern ObjectClass ScreenListItem_class;
+
+ScreenListItem* ScreenListItem_new(const char* value, ScreenSettings* ss);
+
+extern PanelClass ScreensPanel_class;
+
+ScreensPanel* ScreensPanel_new(Settings* settings);
+
+void ScreensPanel_update(Panel* super);
+
+#endif

Settings.c

@@ -24,14 +24,62 @@ in the source distribution for its full text.
 #include "XUtils.h"
 
 
+/*
+
+static char** readQuotedList(char* line) {
+   int n = 0;
+   char** list = xCalloc(sizeof(char*), 1);
+   int start = 0;
+   for (;;) {
+      while (line[start] && line[start] == ' ') {
+         start++;
+      }
+      if (line[start] != '"') {
+         break;
+      }
+      start++;
+      int close = start;
+      while (line[close] && line[close] != '"') {
+         close++;
+      }
+      int len = close - start;
+      char* item = xMalloc(len + 1);
+      strncpy(item, line + start, len);
+      item[len] = '\0';
+      list[n] = item;
+      n++;
+      list = xRealloc(list, sizeof(char*) * (n + 1));
+      start = close + 1;
+   }
+   list[n] = NULL;
+   return list;
+}
+
+static void writeQuotedList(FILE* fd, char** list) {
+   const char* sep = "";
+   for (int i = 0; list[i]; i++) {
+      fprintf(fd, "%s\"%s\"", sep, list[i]);
+      sep = " ";
+   }
+   fprintf(fd, "\n");
+}
+
+*/
+
 void Settings_delete(Settings* this) {
    free(this->filename);
-   free(this->fields);
    for (unsigned int i = 0; i < HeaderLayout_getColumns(this->hLayout); i++) {
       String_freeArray(this->hColumns[i].names);
       free(this->hColumns[i].modes);
    }
    free(this->hColumns);
+   if (this->screens) {
+      for (unsigned int i = 0; this->screens[i]; i++) {
+         free(this->screens[i]->name);
+         free(this->screens[i]->fields);
+      }
+      free(this->screens);
+   }
    free(this);
 }
 
@@ -148,46 +196,98 @@ static void Settings_defaultMeters(Settings* this, unsigned int initialCpuCount)
    this->hColumns[1].modes[r++] = TEXT_METERMODE;
 }
 
-static void Settings_readFields(Settings* settings, const char* line) {
+static const char* toFieldName(Hashtable* columns, int id) {
+   if (id < 0)
+      return NULL;
+   if (id >= LAST_PROCESSFIELD) {
+      const DynamicColumn* column = DynamicColumn_lookup(columns, id);
+      return column->name;
+   }
+   return Process_fields[id].name;
+}
+
+static int toFieldIndex(Hashtable* columns, const char* str) {
+   if (isdigit(str[0])) {
+      // This "+1" is for compatibility with the older enum format.
+      int id = atoi(str) + 1;
+      if (toFieldName(columns, id)) {
+         return id;
+      }
+   } else {
+      // Dynamically-defined columns are always stored by-name.
+      char dynamic[32] = {0};
+      if (sscanf(str, "Dynamic(%30s)", dynamic)) {
+         char* end;
+         if ((end = strrchr(dynamic, ')')) != NULL) {
+	    bool success;
+            unsigned int key;
+            *end = '\0';
+            success = DynamicColumn_search(columns, dynamic, &key) != NULL;
+            *end = ')';
+	    if (success)
+               return key;
+         }
+      }
+      // Fallback to iterative scan of table of fields by-name.
+      for (int p = 1; p < LAST_PROCESSFIELD; p++) {
+         const char* pName = toFieldName(columns, p);
+         if (pName && strcmp(pName, str) == 0)
+            return p;
+      }
+   }
+   return -1;
+}
+
+static void ScreenSettings_readFields(ScreenSettings* ss, Hashtable* columns, const char* line) {
    char* trim = String_trim(line);
    char** ids = String_split(trim, ' ', NULL);
    free(trim);
 
-   settings->flags = 0;
-
    unsigned int i, j;
    for (j = 0, i = 0; ids[i]; i++) {
       if (j >= UINT_MAX / sizeof(ProcessField))
          continue;
       if (j >= LAST_PROCESSFIELD) {
-         settings->fields = xRealloc(settings->fields, j * sizeof(ProcessField));
+         ss->fields = xRealloc(ss->fields, (j+1) * sizeof(ProcessField));
-         memset(&settings->fields[j], 0, sizeof(ProcessField));
+         memset(&ss->fields[j], 0, sizeof(ProcessField));
-      }
-
-      // Dynamically-defined columns are always stored by-name.
-      char dynamic[32] = {0};
-      if (sscanf(ids[i], "Dynamic(%30s)", dynamic)) {
-         char* end;
-         if ((end = strrchr(dynamic, ')')) == NULL)
-            continue;
-         *end = '\0';
-         unsigned int key;
-         if (!DynamicColumn_search(settings->dynamicColumns, dynamic, &key))
-            continue;
-         settings->fields[j++] = key;
-         continue;
-      }
-      // This "+1" is for compatibility with the older enum format.
-      int id = atoi(ids[i]) + 1;
-      if (id > 0 && id < LAST_PROCESSFIELD && Process_fields[id].name) {
-         settings->flags |= Process_fields[id].flags;
-         settings->fields[j++] = id;
       }
+      int id = toFieldIndex(columns, ids[i]);
+      if (id >= 0)
+         ss->fields[j] = id;
+      if (id > 0 && id < LAST_PROCESSFIELD)
+         ss->flags |= Process_fields[id].flags;
+      j++;
    }
-   settings->fields[j] = NULL_PROCESSFIELD;
    String_freeArray(ids);
 }
 
+ScreenSettings* Settings_newScreen(Settings* this, const char* name, const char* line) {
+   ScreenSettings* ss = xCalloc(sizeof(ScreenSettings), 1);
+   ss->name = xStrdup(name);
+   ss->fields = xCalloc(LAST_PROCESSFIELD, sizeof(ProcessField));
+   ss->flags = 0;
+   ss->direction = 1;
+   ss->treeDirection = 1;
+   ss->treeSortKey = 1;
+   ss->treeView = false;
+   ss->treeViewAlwaysByPID = false;
+   ss->allBranchesCollapsed = false;
+   ScreenSettings_readFields(ss, this->dynamicColumns, line);
+   this->screens[this->nScreens] = ss;
+   this->nScreens++;
+   this->screens = xRealloc(this->screens, sizeof(ScreenSettings*) * (this->nScreens + 1));
+   this->screens[this->nScreens] = NULL;
+   return ss;
+}
+
+static void Settings_defaultScreens(Settings* this) {
+   for (unsigned int i = 0; i < Platform_numberOfDefaultScreens; i++) {
+      ScreenDefaults* defaults = &Platform_defaultScreens[i];
+      Settings_newScreen(this, defaults->name, defaults->columns);
+      this->screens[i]->sortKey = toFieldIndex(this->dynamicColumns, defaults->sortKey);
+   }
+}
+
 static bool Settings_read(Settings* this, const char* fileName, unsigned int initialCpuCount) {
    FILE* fd = fopen(fileName, "r");
    if (!fd)
@@ -220,23 +320,33 @@ static bool Settings_read(Settings* this, const char* fileName, unsigned int ini
             return false;
          }
       } else if (String_eq(option[0], "fields")) {
-         Settings_readFields(this, option[1]);
+         // old (no screen) naming also supported for backwards compatibility
+         if (!this->nScreens)
+            Settings_defaultScreens(this);
+         ScreenSettings_readFields(this->screens[0], this->dynamicColumns, option[1]);
       } else if (String_eq(option[0], "sort_key")) {
+         // old (no screen) naming also supported for backwards compatibility
          // This "+1" is for compatibility with the older enum format.
-         this->sortKey = atoi(option[1]) + 1;
+         this->screens[0]->sortKey = atoi(option[1]) + 1;
       } else if (String_eq(option[0], "tree_sort_key")) {
+         // old (no screen) naming also supported for backwards compatibility
          // This "+1" is for compatibility with the older enum format.
-         this->treeSortKey = atoi(option[1]) + 1;
+         this->screens[0]->treeSortKey = atoi(option[1]) + 1;
       } else if (String_eq(option[0], "sort_direction")) {
-         this->direction = atoi(option[1]);
+         // old (no screen) naming also supported for backwards compatibility
+         this->screens[0]->direction = atoi(option[1]);
       } else if (String_eq(option[0], "tree_sort_direction")) {
-         this->treeDirection = atoi(option[1]);
+         // old (no screen) naming also supported for backwards compatibility
+         this->screens[0]->treeDirection = atoi(option[1]);
       } else if (String_eq(option[0], "tree_view")) {
-         this->treeView = atoi(option[1]);
+         // old (no screen) naming also supported for backwards compatibility
+         this->screens[0]->treeView = atoi(option[1]);
       } else if (String_eq(option[0], "tree_view_always_by_pid")) {
-         this->treeViewAlwaysByPID = atoi(option[1]);
+         // old (no screen) naming also supported for backwards compatibility
+         this->screens[0]->treeViewAlwaysByPID = atoi(option[1]);
       } else if (String_eq(option[0], "all_branches_collapsed")) {
-         this->allBranchesCollapsed = atoi(option[1]);
+         // old (no screen) naming also supported for backwards compatibility
+         this->screens[0]->allBranchesCollapsed = atoi(option[1]);
       } else if (String_eq(option[0], "hide_kernel_threads")) {
          this->hideKernelThreads = atoi(option[1]);
       } else if (String_eq(option[0], "hide_userland_threads")) {
@@ -267,6 +377,8 @@ static bool Settings_read(Settings* this, const char* fileName, unsigned int ini
          this->showMergedCommand = atoi(option[1]);
       } else if (String_eq(option[0], "header_margin")) {
          this->headerMargin = atoi(option[1]);
+      } else if (String_eq(option[0], "screen_tabs")) {
+         this->screenTabs = atoi(option[1]);
       } else if (String_eq(option[0], "expand_system_time")) {
          // Compatibility option.
          this->detailedCPUTime = atoi(option[1]);
@@ -332,23 +444,45 @@ static bool Settings_read(Settings* this, const char* fileName, unsigned int ini
       } else if (String_eq(option[0], "topology_affinity")) {
          this->topologyAffinity = !!atoi(option[1]);
       #endif
+      } else if (strncmp(option[0], "screen:", 7) == 0) {
+         Settings_newScreen(this, option[0] + 7, option[1]);
+      } else if (String_eq(option[0], ".sort_key")) {
+         if (this->nScreens)
+            this->screens[this->nScreens - 1]->sortKey = toFieldIndex(this->dynamicColumns, option[1]);
+      } else if (String_eq(option[0], ".tree_sort_key")) {
+         if (this->nScreens)
+            this->screens[this->nScreens - 1]->treeSortKey = toFieldIndex(this->dynamicColumns, option[1]);
+      } else if (String_eq(option[0], ".sort_direction")) {
+         if (this->nScreens)
+            this->screens[this->nScreens - 1]->direction = atoi(option[1]);
+      } else if (String_eq(option[0], ".tree_sort_direction")) {
+         if (this->nScreens)
+            this->screens[this->nScreens - 1]->treeDirection = atoi(option[1]);
+      } else if (String_eq(option[0], ".tree_view")) {
+         if (this->nScreens)
+            this->screens[this->nScreens - 1]->treeView = atoi(option[1]);
+      } else if (String_eq(option[0], ".tree_view_always_by_pid")) {
+         if (this->nScreens)
+            this->screens[this->nScreens - 1]->treeViewAlwaysByPID = atoi(option[1]);
+      } else if (String_eq(option[0], ".all_branches_collapsed")) {
+         if (this->nScreens)
+            this->screens[this->nScreens - 1]->allBranchesCollapsed = atoi(option[1]);
       }
       String_freeArray(option);
    }
    fclose(fd);
-   if (!didReadMeters || !Settings_validateMeters(this)) {
+   if (!didReadMeters || !Settings_validateMeters(this))
       Settings_defaultMeters(this, initialCpuCount);
-   }
+   if (!this->nScreens)
+      Settings_defaultScreens(this);
    return didReadAny;
 }
 
-static void writeFields(FILE* fd, const ProcessField* fields, Hashtable* columns, const char* name, char separator) {
+static void writeFields(FILE* fd, const ProcessField* fields, Hashtable* columns, bool byName, char separator) {
-   fprintf(fd, "%s=", name);
    const char* sep = "";
    for (unsigned int i = 0; fields[i]; i++) {
-      if (fields[i] >= LAST_PROCESSFIELD) {
+      if (fields[i] >= LAST_PROCESSFIELD || byName) {
-         const DynamicColumn* column = DynamicColumn_lookup(columns, fields[i]);
+         fprintf(fd, "%s%s", sep, toFieldName(columns, i));
-         fprintf(fd, "%sDynamic(%s)", sep, column->name);
       } else {
          // This "-1" is for compatibility with the older enum format.
          fprintf(fd, "%s%d", sep, (int) fields[i] - 1);
@@ -358,15 +492,19 @@ static void writeFields(FILE* fd, const ProcessField* fields, Hashtable* columns
    fputc(separator, fd);
 }
 
-static void writeMeters(const Settings* this, FILE* fd, char separator, unsigned int column) {
+static void writeList(FILE* fd, char** list, int len, char separator) {
    const char* sep = "";
-   for (size_t i = 0; i < this->hColumns[column].len; i++) {
+   for (int i = 0; i < len; i++) {
-      fprintf(fd, "%s%s", sep, this->hColumns[column].names[i]);
+      fprintf(fd, "%s%s", sep, list[i]);
       sep = " ";
    }
    fputc(separator, fd);
 }
 
+static void writeMeters(const Settings* this, FILE* fd, char separator, unsigned int column) {
+   writeList(fd, this->hColumns[column].names, this->hColumns[column].len, separator);
+}
+
 static void writeMeterModes(const Settings* this, FILE* fd, char separator, unsigned int column) {
    const char* sep = "";
    for (size_t i = 0; i < this->hColumns[column].len; i++) {
@@ -400,12 +538,7 @@ int Settings_write(const Settings* this, bool onCrash) {
    }
    printSettingString("htop_version", VERSION);
    printSettingInteger("config_reader_min_version", CONFIG_READER_MIN_VERSION);
-   writeFields(fd, this->fields, this->dynamicColumns, "fields", separator);
+   fprintf(fd, "fields="); writeFields(fd, this->screens[0]->fields, this->dynamicColumns, false, separator);
-   // This "-1" is for compatibility with the older enum format.
-   printSettingInteger("sort_key", this->sortKey - 1);
-   printSettingInteger("sort_direction", this->direction);
-   printSettingInteger("tree_sort_key", this->treeSortKey - 1);
-   printSettingInteger("tree_sort_direction", this->treeDirection);
    printSettingInteger("hide_kernel_threads", this->hideKernelThreads);
    printSettingInteger("hide_userland_threads", this->hideUserlandThreads);
    printSettingInteger("shadow_other_users", this->shadowOtherUsers);
@@ -420,10 +553,8 @@ int Settings_write(const Settings* this, bool onCrash) {
    printSettingInteger("find_comm_in_cmdline", this->findCommInCmdline);
    printSettingInteger("strip_exe_from_cmdline", this->stripExeFromCmdline);
    printSettingInteger("show_merged_command", this->showMergedCommand);
-   printSettingInteger("tree_view", this->treeView);
-   printSettingInteger("tree_view_always_by_pid", this->treeViewAlwaysByPID);
-   printSettingInteger("all_branches_collapsed", this->allBranchesCollapsed);
    printSettingInteger("header_margin", this->headerMargin);
+   printSettingInteger("screen_tabs", this->screenTabs);
    printSettingInteger("detailed_cpu_time", this->detailedCPUTime);
    printSettingInteger("cpu_count_from_one", this->countCPUsFromOne);
    printSettingInteger("show_cpu_usage", this->showCPUUsage);
@@ -452,6 +583,31 @@ int Settings_write(const Settings* this, bool onCrash) {
       writeMeterModes(this, fd, separator, i);
    }
 
+   // Legacy compatibility with older versions of htop
+   printSettingInteger("tree_view", this->screens[0]->treeView);
+   // This "-1" is for compatibility with the older enum format.
+   printSettingInteger("sort_key", this->screens[0]->sortKey - 1);
+   printSettingInteger("tree_sort_key", this->screens[0]->treeSortKey - 1);
+   printSettingInteger("sort_direction", this->screens[0]->direction);
+   printSettingInteger("tree_sort_direction", this->screens[0]->treeDirection);
+   printSettingInteger("tree_view_always_by_pid", this->screens[0]->treeViewAlwaysByPID);
+   printSettingInteger("all_branches_collapsed", this->screens[0]->allBranchesCollapsed);
+
+   if (this->screens && this->screens[0]) {
+      for (unsigned int i = 0; i < this->nScreens; i++) {
+         ScreenSettings* ss = this->screens[i];
+         fprintf(fd, "screen:%s=", ss->name);
+         writeFields(fd, ss->fields, this->dynamicColumns, true, separator);
+         printSettingString(".sort_key", toFieldName(this->dynamicColumns, ss->sortKey));
+         printSettingString(".tree_sort_key", toFieldName(this->dynamicColumns, ss->treeSortKey));
+         printSettingInteger(".tree_view", ss->treeView);
+         printSettingInteger(".tree_view_always_by_pid", ss->treeViewAlwaysByPID);
+         printSettingInteger(".sort_direction", ss->direction);
+         printSettingInteger(".tree_sort_direction", ss->treeDirection);
+         printSettingInteger(".all_branches_collapsed", ss->allBranchesCollapsed);
+      }
+   }
+
    #undef printSettingString
    #undef printSettingInteger
 
@@ -475,16 +631,11 @@ Settings* Settings_new(unsigned int initialCpuCount, Hashtable* dynamicColumns)
    this->dynamicColumns = dynamicColumns;
    this->hLayout = HF_TWO_50_50;
    this->hColumns = xCalloc(HeaderLayout_getColumns(this->hLayout), sizeof(MeterColumnSetting));
-   this->sortKey = PERCENT_CPU;
+
-   this->treeSortKey = PID;
-   this->direction = -1;
-   this->treeDirection = 1;
    this->shadowOtherUsers = false;
    this->showThreadNames = false;
    this->hideKernelThreads = true;
    this->hideUserlandThreads = false;
-   this->treeView = false;
-   this->allBranchesCollapsed = false;
    this->highlightBaseName = false;
    this->highlightDeletedExe = true;
    this->highlightMegabytes = true;
@@ -506,18 +657,13 @@ Settings* Settings_new(unsigned int initialCpuCount, Hashtable* dynamicColumns)
    this->showMergedCommand = false;
    this->hideFunctionBar = 0;
    this->headerMargin = true;
+   this->screenTabs = true;
    #ifdef HAVE_LIBHWLOC
    this->topologyAffinity = false;
    #endif
-   this->fields = xCalloc(LAST_PROCESSFIELD + 1, sizeof(ProcessField));
+
-   // TODO: turn 'fields' into a Vector,
+   this->screens = xCalloc(Platform_numberOfDefaultScreens * sizeof(ScreenSettings*), 1);
-   // (and ProcessFields into proper objects).
+   this->nScreens = 0;
-   this->flags = 0;
-   const ProcessField* defaults = Platform_defaultFields;
-   for (int i = 0; defaults[i]; i++) {
-      this->fields[i] = defaults[i];
-      this->flags |= Process_fields[defaults[i]].flags;
-   }
 
    char* legacyDotfile = NULL;
    const char* rcfile = getenv("HTOPRC");
@@ -578,16 +724,21 @@ Settings* Settings_new(unsigned int initialCpuCount, Hashtable* dynamicColumns)
    }
    if (!ok) {
       Settings_defaultMeters(this, initialCpuCount);
+      Settings_defaultScreens(this);
    }
+
+   this->ssIndex = 0;
+   this->ss = this->screens[this->ssIndex];
+
    return this;
 }
 
-void Settings_invertSortOrder(Settings* this) {
+void ScreenSettings_invertSortOrder(ScreenSettings* this) {
    int* attr = (this->treeView) ? &(this->treeDirection) : &(this->direction);
    *attr = (*attr == 1) ? -1 : 1;
 }
 
-void Settings_setSortKey(Settings* this, ProcessField sortKey) {
+void ScreenSettings_setSortKey(ScreenSettings* this, ProcessField sortKey) {
    if (this->treeViewAlwaysByPID || !this->treeView) {
       this->sortKey = sortKey;
       this->direction = (Process_fields[sortKey].defaultSortDesc) ? -1 : 1;

Settings.h

@@ -19,7 +19,13 @@ in the source distribution for its full text.
 
 #define DEFAULT_DELAY 15
 
-#define CONFIG_READER_MIN_VERSION 2
+#define CONFIG_READER_MIN_VERSION 3
+
+typedef struct {
+   const char* name;
+   const char* columns;
+   const char* sortKey;
+} ScreenDefaults;
 
 typedef struct {
    size_t len;
@@ -27,6 +33,19 @@ typedef struct {
    int* modes;
 } MeterColumnSetting;
 
+typedef struct {
+   char* name;
+   ProcessField* fields;
+   uint32_t flags;
+   int direction;
+   int treeDirection;
+   ProcessField sortKey;
+   ProcessField treeSortKey;
+   bool treeView;
+   bool treeViewAlwaysByPID;
+   bool allBranchesCollapsed;
+} ScreenSettings;
+
 typedef struct Settings_ {
    char* filename;
    int config_version;
@@ -34,16 +53,14 @@ typedef struct Settings_ {
    MeterColumnSetting* hColumns;
    Hashtable* dynamicColumns;
 
-   ProcessField* fields;
+   ScreenSettings** screens;
-   uint32_t flags;
+   unsigned int nScreens;
+   unsigned int ssIndex;
+   ScreenSettings* ss;
+
    int colorScheme;
    int delay;
 
-   int direction;
-   int treeDirection;
-   ProcessField sortKey;
-   ProcessField treeSortKey;
-
    bool countCPUsFromOne;
    bool detailedCPUTime;
    bool showCPUUsage;
@@ -52,9 +69,6 @@ typedef struct Settings_ {
    bool showCPUTemperature;
    bool degreeFahrenheit;
    #endif
-   bool treeView;
-   bool treeViewAlwaysByPID;
-   bool allBranchesCollapsed;
    bool showProgramPath;
    bool shadowOtherUsers;
    bool showThreadNames;
@@ -72,6 +86,7 @@ typedef struct Settings_ {
    bool updateProcessNames;
    bool accountGuestInCPUMeter;
    bool headerMargin;
+   bool screenTabs;
    #ifdef HAVE_GETMOUSE
    bool enableMouse;
    #endif
@@ -85,13 +100,13 @@ typedef struct Settings_ {
 
 #define Settings_cpuId(settings, cpu) ((settings)->countCPUsFromOne ? (cpu)+1 : (cpu))
 
-static inline ProcessField Settings_getActiveSortKey(const Settings* this) {
+static inline ProcessField ScreenSettings_getActiveSortKey(const ScreenSettings* this) {
    return (this->treeView)
           ? (this->treeViewAlwaysByPID ? PID : this->treeSortKey)
           : this->sortKey;
 }
 
-static inline int Settings_getActiveDirection(const Settings* this) {
+static inline int ScreenSettings_getActiveDirection(const ScreenSettings* this) {
    return this->treeView ? this->treeDirection : this->direction;
 }
 
@@ -101,9 +116,11 @@ int Settings_write(const Settings* this, bool onCrash);
 
 Settings* Settings_new(unsigned int initialCpuCount, Hashtable* dynamicColumns);
 
-void Settings_invertSortOrder(Settings* this);
+ScreenSettings* Settings_newScreen(Settings* this, const char* name, const char* line);
 
-void Settings_setSortKey(Settings* this, ProcessField sortKey);
+void ScreenSettings_invertSortOrder(ScreenSettings* this);
+
+void ScreenSettings_setSortKey(ScreenSettings* this, ProcessField sortKey);
 
 void Settings_enableReadonly(void);
 

darwin/DarwinProcess.c

@@ -322,7 +322,7 @@ void DarwinProcess_setFromKInfoProc(Process* proc, const struct kinfo_proc* ps,
       DarwinProcess_updateExe(ep->p_pid, proc);
       DarwinProcess_updateCmdLine(ps, proc);
 
-      if (proc->settings->flags & PROCESS_FLAG_CWD) {
+      if (proc->settings->ss->flags & PROCESS_FLAG_CWD) {
          DarwinProcess_updateCwd(ep->p_pid, proc);
       }
    }

darwin/Platform.c

@@ -49,6 +49,16 @@ in the source distribution for its full text.
 #endif
 
 
+ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
+
 const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 const SignalItem Platform_signals[] = {

darwin/Platform.h

@@ -26,7 +26,9 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern const ProcessField Platform_defaultFields[];
+extern ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 

dragonflybsd/DragonFlyBSDProcessList.c

@@ -481,7 +481,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
          DragonFlyBSDProcessList_updateExe(kproc, proc);
          DragonFlyBSDProcessList_updateProcessName(dfpl->kd, kproc, proc);
 
-         if (settings->flags & PROCESS_FLAG_CWD) {
+         if (settings->ss->flags & PROCESS_FLAG_CWD) {
             DragonFlyBSDProcessList_updateCwd(kproc, proc);
          }
 

dragonflybsd/Platform.c

@@ -32,8 +32,15 @@ in the source distribution for its full text.
 #include "dragonflybsd/DragonFlyBSDProcess.h"
 #include "dragonflybsd/DragonFlyBSDProcessList.h"
 
+ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+};
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },

dragonflybsd/Platform.h

@@ -29,7 +29,9 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern const ProcessField Platform_defaultFields[];
+extern ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 

freebsd/FreeBSDProcessList.c

@@ -516,7 +516,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
          FreeBSDProcessList_updateExe(kproc, proc);
          FreeBSDProcessList_updateProcessName(fpl->kd, kproc, proc);
 
-         if (settings->flags & PROCESS_FLAG_CWD) {
+         if (settings->ss->flags & PROCESS_FLAG_CWD) {
             FreeBSDProcessList_updateCwd(kproc, proc);
          }
 

freebsd/Platform.c

@@ -50,8 +50,15 @@ in the source distribution for its full text.
 #include "zfs/ZfsArcMeter.h"
 #include "zfs/ZfsCompressedArcMeter.h"
 
+ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+};
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },

freebsd/Platform.h

@@ -25,7 +25,9 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern const ProcessField Platform_defaultFields[];
+extern ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 

linux/LinuxProcessList.c

@@ -1370,6 +1370,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
    ProcessList* pl = (ProcessList*) this;
    const struct dirent* entry;
    const Settings* settings = pl->settings;
+   const ScreenSettings* ss = settings->ss;
 
 #ifdef HAVE_OPENAT
    int dirFd = openat(parentFd, dirname, O_RDONLY | O_DIRECTORY | O_NOFOLLOW);
@@ -1463,7 +1464,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
          continue;
       }
 
-      if (settings->flags & PROCESS_FLAG_IO)
+      if (ss->flags & PROCESS_FLAG_IO)
          LinuxProcessList_readIoFile(lp, procFd, pl->realtimeMs);
 
       if (!LinuxProcessList_readStatmFile(lp, procFd))
@@ -1472,7 +1473,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       {
          bool prev = proc->usesDeletedLib;
 
-         if ((settings->flags & PROCESS_FLAG_LINUX_LRS_FIX) ||
+         if ((ss->flags & PROCESS_FLAG_LINUX_LRS_FIX) ||
              (settings->highlightDeletedExe && !proc->procExeDeleted && !proc->isKernelThread && !proc->isUserlandThread)) {
             // Check if we really should recalculate the M_LRS value for this process
             uint64_t passedTimeInMs = pl->realtimeMs - lp->last_mlrs_calctime;
@@ -1481,7 +1482,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
 
             if (passedTimeInMs > recheck) {
                lp->last_mlrs_calctime = pl->realtimeMs;
-               LinuxProcessList_readMaps(lp, procFd, settings->flags & PROCESS_FLAG_LINUX_LRS_FIX, settings->highlightDeletedExe);
+               LinuxProcessList_readMaps(lp, procFd, ss->flags & PROCESS_FLAG_LINUX_LRS_FIX, settings->highlightDeletedExe);
             }
          } else {
             /* Copy from process structure in threads and reset if setting got disabled */
@@ -1491,7 +1492,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
          proc->mergedCommand.exeChanged |= prev ^ proc->usesDeletedLib;
       }
 
-      if ((settings->flags & PROCESS_FLAG_LINUX_SMAPS) && !Process_isKernelThread(proc)) {
+      if ((ss->flags & PROCESS_FLAG_LINUX_SMAPS) && !Process_isKernelThread(proc)) {
          if (!parent) {
             // Read smaps file of each process only every second pass to improve performance
             static int smaps_flag = 0;
@@ -1521,7 +1522,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
          proc->tty_name = LinuxProcessList_updateTtyDevice(this->ttyDrivers, proc->tty_nr);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_IOPRIO) {
+      if (ss->flags & PROCESS_FLAG_LINUX_IOPRIO) {
          LinuxProcess_updateIOPriority(lp);
       }
 
@@ -1536,13 +1537,13 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       if (!preExisting) {
 
          #ifdef HAVE_OPENVZ
-         if (settings->flags & PROCESS_FLAG_LINUX_OPENVZ) {
+         if (ss->flags & PROCESS_FLAG_LINUX_OPENVZ) {
             LinuxProcessList_readOpenVZData(lp, procFd);
          }
          #endif
 
          #ifdef HAVE_VSERVER
-         if (settings->flags & PROCESS_FLAG_LINUX_VSERVER) {
+         if (ss->flags & PROCESS_FLAG_LINUX_VSERVER) {
             LinuxProcessList_readVServerData(lp, procFd);
          }
          #endif
@@ -1567,32 +1568,32 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, openat_arg_
       }
 
       #ifdef HAVE_DELAYACCT
-      if (settings->flags & PROCESS_FLAG_LINUX_DELAYACCT) {
+      if (ss->flags & PROCESS_FLAG_LINUX_DELAYACCT) {
          LinuxProcessList_readDelayAcctData(this, lp);
       }
       #endif
 
-      if (settings->flags & PROCESS_FLAG_LINUX_CGROUP) {
+      if (ss->flags & PROCESS_FLAG_LINUX_CGROUP) {
          LinuxProcessList_readCGroupFile(lp, procFd);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_OOM) {
+      if (ss->flags & PROCESS_FLAG_LINUX_OOM) {
          LinuxProcessList_readOomData(lp, procFd);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_CTXT) {
+      if (ss->flags & PROCESS_FLAG_LINUX_CTXT) {
          LinuxProcessList_readCtxtData(lp, procFd);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_SECATTR) {
+      if (ss->flags & PROCESS_FLAG_LINUX_SECATTR) {
          LinuxProcessList_readSecattrData(lp, procFd);
       }
 
-      if (settings->flags & PROCESS_FLAG_CWD) {
+      if (ss->flags & PROCESS_FLAG_CWD) {
          LinuxProcessList_readCwd(lp, procFd);
       }
 
-      if ((settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP) && this->haveAutogroup) {
+      if ((ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) && this->haveAutogroup) {
          LinuxProcessList_readAutogroup(lp, procFd);
       }
 
@@ -2146,7 +2147,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
       return;
    }
 
-   if (settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP) {
+   if (settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP) {
       // Refer to sched(7) 'autogroup feature' section
       // The kernel feature can be enabled/disabled through procfs at
       // any time, so check for it at the start of each sample - only

linux/Platform.c

@@ -79,7 +79,20 @@ enum CapMode {
 };
 #endif
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT M_SHARE STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+   {
+      .name = "I/O",
+      .columns = "PID USER IO_PRIORITY IO_RATE IO_READ_RATE IO_WRITE_RATE PERCENT_SWAP_DELAY PERCENT_IO_DELAY COMM",
+      .sortKey = "IO_RATE",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number = 0 },

linux/Platform.h

@@ -38,7 +38,9 @@ in the source distribution for its full text.
 #endif
 
 
-extern const ProcessField Platform_defaultFields[];
+extern ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 extern const SignalItem Platform_signals[];
 

netbsd/NetBSDProcessList.c

@@ -307,7 +307,7 @@ static void NetBSDProcessList_scanProcs(NetBSDProcessList* this) {
          }
       }
 
-      if (settings->flags & PROCESS_FLAG_CWD) {
+      if (settings->ss->flags & PROCESS_FLAG_CWD) {
          NetBSDProcessList_updateCwd(kproc, proc);
       }
 

netbsd/Platform.c

@@ -68,6 +68,16 @@ in the source distribution for its full text.
 
 const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
+ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
+
 /*
  * See /usr/include/sys/signal.h
  */

netbsd/Platform.h

@@ -36,6 +36,10 @@ in the source distribution for its full text.
 
 extern const ProcessField Platform_defaultFields[];
 
+extern ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
+
 /* see /usr/include/sys/signal.h */
 extern const SignalItem Platform_signals[];
 

openbsd/OpenBSDProcessList.c

@@ -309,7 +309,7 @@ static void OpenBSDProcessList_scanProcs(OpenBSDProcessList* this) {
 
          OpenBSDProcessList_updateProcessName(this->kd, kproc, proc);
 
-         if (settings->flags & PROCESS_FLAG_CWD) {
+         if (settings->ss->flags & PROCESS_FLAG_CWD) {
             OpenBSDProcessList_updateCwd(kproc, proc);
          }
 

openbsd/Platform.c

@@ -46,7 +46,15 @@ in the source distribution for its full text.
 #include "openbsd/OpenBSDProcessList.h"
 
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
+ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
 
 /*
  * See /usr/include/sys/signal.h

openbsd/Platform.h

@@ -26,7 +26,9 @@ in the source distribution for its full text.
 #include "generic/uname.h"
 
 
-extern const ProcessField Platform_defaultFields[];
+extern ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
 
 /* see /usr/include/sys/signal.h */
 extern const SignalItem Platform_signals[];

pcp/PCPProcessList.c

@@ -384,12 +384,12 @@ static bool PCPProcessList_updateProcesses(PCPProcessList* this, double period,
          continue;
       }
 
-      if (settings->flags & PROCESS_FLAG_IO)
+      if (settings->ss->flags & PROCESS_FLAG_IO)
          PCPProcessList_updateIO(pp, pid, offset, now);
 
       PCPProcessList_updateMemory(pp, pid, offset);
 
-      if ((settings->flags & PROCESS_FLAG_LINUX_SMAPS) &&
+      if ((settings->ss->flags & PROCESS_FLAG_LINUX_SMAPS) &&
           (Process_isKernelThread(proc) == false)) {
          if (PCPMetric_enabled(PCP_PROC_SMAPS_PSS))
             PCPProcessList_updateSmaps(pp, pid, offset);
@@ -419,22 +419,22 @@ static bool PCPProcessList_updateProcesses(PCPProcessList* this, double period,
          PCPProcessList_updateCmdline(proc, pid, offset, command);
       }
 
-      if (settings->flags & PROCESS_FLAG_LINUX_CGROUP)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_CGROUP)
          PCPProcessList_readCGroups(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_LINUX_OOM)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_OOM)
          PCPProcessList_readOomData(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_LINUX_CTXT)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_CTXT)
          PCPProcessList_readCtxtData(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_LINUX_SECATTR)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_SECATTR)
          PCPProcessList_readSecattrData(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_CWD)
+      if (settings->ss->flags & PROCESS_FLAG_CWD)
          PCPProcessList_readCwd(pp, pid, offset);
 
-      if (settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP)
+      if (settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP)
          PCPProcessList_readAutogroup(pp, pid, offset);
 
       if (proc->state == ZOMBIE && !proc->cmdline && command[0]) {
@@ -676,16 +676,16 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
    for (int metric = PCP_PROC_PID; metric < PCP_METRIC_COUNT; metric++)
       PCPMetric_enable(metric, enabled);
 
-   flagged = settings->flags & PROCESS_FLAG_LINUX_CGROUP;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_CGROUP;
    PCPMetric_enable(PCP_PROC_CGROUPS, flagged && enabled);
-   flagged = settings->flags & PROCESS_FLAG_LINUX_OOM;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_OOM;
    PCPMetric_enable(PCP_PROC_OOMSCORE, flagged && enabled);
-   flagged = settings->flags & PROCESS_FLAG_LINUX_CTXT;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_CTXT;
    PCPMetric_enable(PCP_PROC_VCTXSW, flagged && enabled);
    PCPMetric_enable(PCP_PROC_NVCTXSW, flagged && enabled);
-   flagged = settings->flags & PROCESS_FLAG_LINUX_SECATTR;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_SECATTR;
    PCPMetric_enable(PCP_PROC_LABELS, flagged && enabled);
-   flagged = settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP;
+   flagged = settings->ss->flags & PROCESS_FLAG_LINUX_AUTOGROUP;
    PCPMetric_enable(PCP_PROC_AUTOGROUP_ID, flagged && enabled);
    PCPMetric_enable(PCP_PROC_AUTOGROUP_NICE, flagged && enabled);
 

pcp/Platform.c

@@ -54,6 +54,21 @@ in the source distribution for its full text.
 
 Platform* pcp;
 
+ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT M_SHARE STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+   {
+      .name = "I/O",
+      .columns = "PID USER IO_PRIORITY IO_RATE IO_READ_RATE IO_WRITE_RATE PERCENT_SWAP_DELAY PERCENT_IO_DELAY COMM",
+      .sortKey = "IO_RATE",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
+
 ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, (int)M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 int Platform_numberOfFields = LAST_PROCESSFIELD;

pcp/Platform.h

@@ -58,6 +58,10 @@ typedef struct Platform_ {
    unsigned int ncpu;         /* maximum processor count configured */
 } Platform;
 
+extern ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
+
 extern ProcessField Platform_defaultFields[];
 
 extern int Platform_numberOfFields;

solaris/Platform.c

@@ -40,6 +40,16 @@ in the source distribution for its full text.
 #include "SolarisProcessList.h"
 
 
+ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Default",
+      .columns = "PID LWPID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
+
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",      .number =  0 },
    { .name = " 1 SIGHUP",      .number =  1 },
@@ -87,8 +97,6 @@ const SignalItem Platform_signals[] = {
 
 const unsigned int Platform_numberOfSignals = ARRAYSIZE(Platform_signals);
 
-const ProcessField Platform_defaultFields[] = { PID, LWPID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
-
 const MeterClass* const Platform_meterTypes[] = {
    &CPUMeter_class,
    &ClockMeter_class,

solaris/Platform.h

@@ -52,12 +52,14 @@ typedef struct envAccum_ {
    char* env;
 } envAccum;
 
+extern ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
+
 extern const SignalItem Platform_signals[];
 
 extern const unsigned int Platform_numberOfSignals;
 
-extern const ProcessField Platform_defaultFields[];
-
 extern const MeterClass* const Platform_meterTypes[];
 
 bool Platform_init(void);

solaris/SolarisProcessList.c

@@ -451,7 +451,7 @@ static int SolarisProcessList_walkproc(psinfo_t* _psinfo, lwpsinfo_t* _lwpsinfo,
       Process_updateComm(proc, _psinfo->pr_fname);
       Process_updateCmdline(proc, _psinfo->pr_psargs, 0, 0);
 
-      if (proc->settings->flags & PROCESS_FLAG_CWD) {
+      if (proc->settings->ss->flags & PROCESS_FLAG_CWD) {
          SolarisProcessList_updateCwd(_psinfo->pr_pid, proc);
       }
    }

unsupported/Platform.c

@@ -27,14 +27,22 @@ in the source distribution for its full text.
 #include "UptimeMeter.h"
 
 
+const ScreenDefaults Platform_defaultScreens[] = {
+   {
+      .name = "Main",
+      .columns = "PID USER PRIORITY NICE M_VIRT M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME COMM",
+      .sortKey = "PERCENT_CPU",
+   },
+};
+
+const unsigned int Platform_numberOfDefaultScreens = ARRAYSIZE(Platform_defaultScreens);
+
 const SignalItem Platform_signals[] = {
    { .name = " 0 Cancel",    .number =  0 },
 };
 
 const unsigned int Platform_numberOfSignals = ARRAYSIZE(Platform_signals);
 
-const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
-
 const MeterClass* const Platform_meterTypes[] = {
    &CPUMeter_class,
    &ClockMeter_class,

unsupported/Platform.h

@@ -20,12 +20,14 @@ in the source distribution for its full text.
 #include "unsupported/UnsupportedProcess.h"
 
 
+extern const ScreenDefaults Platform_defaultScreens[];
+
+extern const unsigned int Platform_numberOfDefaultScreens;
+
 extern const SignalItem Platform_signals[];
 
 extern const unsigned int Platform_numberOfSignals;
 
-extern const ProcessField Platform_defaultFields[];
-
 extern const MeterClass* const Platform_meterTypes[];
 
 bool Platform_init(void);

unsupported/UnsupportedProcessList.c

@@ -51,7 +51,7 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
    Process_updateCmdline(proc, "<unsupported architecture>", 0, 0);
    Process_updateExe(proc, "/path/to/executable");
 
-   if (proc->settings->flags & PROCESS_FLAG_CWD) {
+   if (proc->settings->ss->flags & PROCESS_FLAG_CWD) {
       free_and_xStrdup(&proc->procCwd, "/current/working/directory");
    }