Support for NCurses 6.0 and mouse wheel

CRT.c

@@ -29,6 +29,9 @@ in the source distribution for its full text.
 #define Cyan COLOR_CYAN
 #define White COLOR_WHITE
 
+#define KEY_WHEELUP KEY_F(20)
+#define KEY_WHEELDOWN KEY_F(21)
+
 //#link curses
 
 /*{
@@ -515,6 +518,8 @@ int CRT_cursorX = 0;
 
 int CRT_scrollHAmount = 5;
 
+int CRT_scrollWheelVAmount = 10;
+
 char* CRT_termType;
 
 // TODO move color scheme to Settings, perhaps?
@@ -550,6 +555,7 @@ void CRT_init(int delay, int colorScheme) {
    nonl();
    intrflush(stdscr, false);
    keypad(stdscr, true);
+   mouseinterval(0);
    curs_set(0);
    if (has_colors()) {
       start_color();
@@ -598,7 +604,11 @@ void CRT_init(int delay, int colorScheme) {
 
    CRT_treeStr = CRT_utf8 ? CRT_treeStrUtf8 : CRT_treeStrAscii;
 
-   mousemask(BUTTON1_CLICKED, NULL);
+#if NCURSES_MOUSE_VERSION > 1
+   mousemask(BUTTON1_RELEASED | BUTTON4_PRESSED | BUTTON5_PRESSED, NULL);
+#else
+   mousemask(BUTTON1_RELEASED, NULL);
+#endif
 }
 
 void CRT_done() {

CRT.h

@@ -20,6 +20,9 @@ in the source distribution for its full text.
 #define Cyan COLOR_CYAN
 #define White COLOR_WHITE
 
+#define KEY_WHEELUP KEY_F(20)
+#define KEY_WHEELDOWN KEY_F(21)
+
 //#link curses
 
 #include <stdbool.h>
@@ -130,6 +133,8 @@ extern int CRT_cursorX;
 
 extern int CRT_scrollHAmount;
 
+extern int CRT_scrollWheelVAmount;
+
 char* CRT_termType;
 
 // TODO move color scheme to Settings, perhaps?

Panel.c

@@ -412,6 +412,21 @@ bool Panel_onKey(Panel* this, int key) {
       this->scrollV += (this->h - 1);
       this->needsRedraw = true;
       break;
+   case KEY_WHEELUP:
+      this->selected -= CRT_scrollWheelVAmount;
+      this->scrollV -= CRT_scrollWheelVAmount;
+      this->needsRedraw = true;
+      break;
+   case KEY_WHEELDOWN:
+   {
+      this->selected += CRT_scrollWheelVAmount;
+      this->scrollV += CRT_scrollWheelVAmount;
+      if (this->scrollV > Vector_size(this->items) - this->h) {
+         this->scrollV = Vector_size(this->items) - this->h;
+      }
+      this->needsRedraw = true;
+      break;
+   }
    case KEY_HOME:
       this->selected = 0;
       break;

ScreenManager.c

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 #include "ProcessList.h"
 
 #include "Object.h"
+#include "CRT.h"
 
 #include <assert.h>
 #include <time.h>
@@ -196,6 +197,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
          MEVENT mevent;
          int ok = getmouse(&mevent);
          if (ok == OK) {
+            if (mevent.bstate & BUTTON1_RELEASED) {
                if (mevent.y == LINES - 1) {
                   ch = FunctionBar_synthesizeEvent(panelFocus->currentBar, mevent.x);
                } else {
@@ -217,6 +219,13 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
                      }
                   }
                }
+            #if NCURSES_MOUSE_VERSION > 1
+            } else if (mevent.bstate & BUTTON4_PRESSED) {
+               ch = KEY_WHEELUP;
+            } else if (mevent.bstate & BUTTON5_PRESSED) {
+               ch = KEY_WHEELDOWN;
+            #endif
+            }
          }
       }
       if (ch == ERR) {

configure.ac

@@ -143,10 +143,12 @@ fi
 
 AC_ARG_ENABLE(unicode, [AC_HELP_STRING([--enable-unicode], [enable Unicode support])], ,enable_unicode="yes")
 if test "x$enable_unicode" = xyes; then
+   AC_CHECK_LIB([ncursesw6], [refresh], [], [
       AC_CHECK_LIB([ncursesw], [refresh], [], [
          missing_libraries="$missing_libraries libncursesw"
          AC_MSG_ERROR([You may want to use --disable-unicode or install libncursesw.])
       ])
+   ])
    AC_CHECK_HEADERS([ncursesw/curses.h],[:],
       [AC_CHECK_HEADERS([ncurses/ncurses.h],[:],
          [AC_CHECK_HEADERS([ncurses/curses.h],[:],