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Support horizontal scroll events in mouse tracking.

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Horizontal scroll events aren't generated by the traditional mouse
wheel, but they can be generated by trackpad gestures, though this
isn't always configured on.

The cross-platform and Windows parts of this patch is due to
Christopher Plewright; I added the GTK support.

(cherry picked from commit 819efc3c21)
This commit is contained in:
Simon Tatham
2023-04-19 14:20:39 +01:00
parent cfda9585ac
commit 1526b56332
4 changed files with 59 additions and 16 deletions
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14
windows/window.c
View File

@ -74,6 +74,9 @@
#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL 0x020A /* not defined in earlier SDKs */
#endif
#ifndef WM_MOUSEHWHEEL
#define WM_MOUSEHWHEEL 0x020E /* not defined in earlier SDKs */
#endif
#ifndef WHEEL_DELTA
#define WHEEL_DELTA 120
#endif
@ -3403,10 +3406,11 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
process_clipdata((HGLOBAL)lParam, wParam);
return 0;
default:
if (message == wm_mousewheel || message == WM_MOUSEWHEEL) {
if (message == wm_mousewheel || message == WM_MOUSEWHEEL
|| message == WM_MOUSEHWHEEL) {
bool shift_pressed = false, control_pressed = false;
if (message == WM_MOUSEWHEEL) {
if (message == WM_MOUSEWHEEL || message == WM_MOUSEHWHEEL) {
wheel_accumulator += (short)HIWORD(wParam);
shift_pressed=LOWORD(wParam) & MK_SHIFT;
control_pressed=LOWORD(wParam) & MK_CONTROL;
@ -3425,10 +3429,10 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
/* reduce amount for next time */
if (wheel_accumulator > 0) {
b = MBT_WHEEL_UP;
b = message == WM_MOUSEHWHEEL ? MBT_WHEEL_RIGHT : MBT_WHEEL_UP;
wheel_accumulator -= WHEEL_DELTA;
} else if (wheel_accumulator < 0) {
b = MBT_WHEEL_DOWN;
b = message == WM_MOUSEHWHEEL ? MBT_WHEEL_LEFT : MBT_WHEEL_DOWN;
wheel_accumulator += WHEEL_DELTA;
} else
break;
@ -3448,7 +3452,7 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
TO_CHR_Y(p.y), shift_pressed,
control_pressed, is_alt_pressed());
} /* else: not sure when this can fail */
} else {
} else if (message != WM_MOUSEHWHEEL) {
/* trigger a scroll */
term_scroll(term, 0,
b == MBT_WHEEL_UP ?