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feat: enhancement of MMB auto-scroll

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This commit is contained in:
Rainer Kottenhoff 2026-03-05 07:54:52 +01:00
parent dcd907dd0f
commit 852cd050d0
1 changed files with 24 additions and 3 deletions
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27
src/Notepad3.c
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@ -175,13 +175,16 @@ static bool s_bUndoRedoScroll = false;
// Middle-click auto-scroll state
static bool s_bAutoScrollMode = false;
static bool s_bAutoScrollHeld = false; // true while MMB is physically held down
static DWORD s_dwAutoScrollStartTick = 0; // GetTickCount() at MMB down
static POINT s_ptAutoScrollOrigin = { 0, 0 };
static POINT s_ptAutoScrollMouse = { 0, 0 };
static double s_dAutoScrollAccumY = 0.0;
#define AUTOSCROLL_TIMER_MS 30 // ~33 fps
#define AUTOSCROLL_DEADZONE 15 // pixels from origin before scrolling starts
#define AUTOSCROLL_DIVISOR 60.0 // higher = slower (lines per pixel per tick scaling)
#define AUTOSCROLL_TIMER_MS 30 // ~33 fps
#define AUTOSCROLL_DEADZONE 15 // pixels from origin before scrolling starts
#define AUTOSCROLL_DIVISOR 60.0 // higher = slower (lines per pixel per tick scaling)
#define AUTOSCROLL_CLICK_THRESHOLD_MS 200 // ms: below = click (toggle), above = hold (release-to-stop)
// for tiny expression calculation
static double s_dExpression = 0.0;
@ -2413,6 +2416,7 @@ static void _AutoScrollStop(HWND hwndEdit)
ReleaseCapture();
SciCall_SetCursor(SC_CURSORNORMAL);
s_bAutoScrollMode = false;
s_bAutoScrollHeld = false;
s_dAutoScrollAccumY = 0.0;
}
}
@ -2474,12 +2478,29 @@ static LRESULT CALLBACK _EditSubclassProc(
if ((pos >= 0) && SciCall_IndicatorValueAt(INDIC_NP3_HYPERLINK, pos)) {
HandleHotSpotURLClicked(pos, OPEN_WITH_BROWSER);
} else {
s_bAutoScrollHeld = true;
s_dwAutoScrollStartTick = GetTickCount();
_AutoScrollStart(hwnd, pt);
}
}
return 0;
}
case WM_MBUTTONUP: {
if (s_bAutoScrollMode && s_bAutoScrollHeld) {
DWORD const elapsed = GetTickCount() - s_dwAutoScrollStartTick;
if (elapsed > AUTOSCROLL_CLICK_THRESHOLD_MS) {
// Hold-to-scroll: stop on release
_AutoScrollStop(hwnd);
} else {
// Quick click: keep scrolling (toggle mode)
s_bAutoScrollHeld = false;
}
return 0;
}
break;
}
case WM_MOUSEMOVE:
if (s_bAutoScrollMode) {
s_ptAutoScrollMouse = POINTFromLParam(lParam);