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Code Issues Releases Wiki Activity

Codechange: Add OnScrollbarScroll window event, called when a scrollbar position changes.

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This commit is contained in:
Peter Nelson
2025-05-14 18:06:49 +01:00
committed by Peter Nelson
parent 321f7e8683
commit 780c26237f
3 changed files with 24 additions and 4 deletions
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20
src/window.cpp
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@@ -818,7 +818,10 @@ static void DispatchMouseWheelEvent(Window *w, NWidgetCore *nwid, int wheel)
if (nwid->type == NWID_VSCROLLBAR) {
NWidgetScrollbar *sb = static_cast<NWidgetScrollbar *>(nwid);
if (sb->GetCount() > sb->GetCapacity()) {
if (sb->UpdatePosition(wheel)) w->SetDirty();
if (sb->UpdatePosition(wheel)) {
w->OnScrollbarScroll(nwid->GetIndex());
w->SetDirty();
}
}
return;
}
@@ -826,7 +829,10 @@ static void DispatchMouseWheelEvent(Window *w, NWidgetCore *nwid, int wheel)
/* Scroll the widget attached to the scrollbar. */
Scrollbar *sb = (nwid->GetScrollbarIndex() >= 0 ? w->GetScrollbar(nwid->GetScrollbarIndex()) : nullptr);
if (sb != nullptr && sb->GetCount() > sb->GetCapacity()) {
if (sb->UpdatePosition(wheel)) w->SetDirty();
if (sb->UpdatePosition(wheel)) {
w->OnScrollbarScroll(nwid->GetScrollbarIndex());
w->SetDirty();
}
}
}
@@ -2342,7 +2348,10 @@ static void HandleScrollbarScrolling(Window *w)
if (sb->disp_flags.Any({NWidgetDisplayFlag::ScrollbarUp, NWidgetDisplayFlag::ScrollbarDown})) {
if (_scroller_click_timeout == 1) {
_scroller_click_timeout = 3;
if (sb->UpdatePosition(rtl == sb->disp_flags.Test(NWidgetDisplayFlag::ScrollbarUp) ? 1 : -1)) w->SetDirty();
if (sb->UpdatePosition(rtl == sb->disp_flags.Test(NWidgetDisplayFlag::ScrollbarUp) ? 1 : -1)) {
w->OnScrollbarScroll(w->mouse_capture_widget);
w->SetDirty();
}
}
return;
}
@@ -2353,7 +2362,10 @@ static void HandleScrollbarScrolling(Window *w)
int pos = RoundDivSU((i + _scrollbar_start_pos) * range, std::max(1, _scrollbar_size));
if (rtl) pos = range - pos;
if (sb->SetPosition(pos)) w->SetDirty();
if (sb->SetPosition(pos)) {
w->OnScrollbarScroll(w->mouse_capture_widget);
w->SetDirty();
}
}
/**