kotatogram/lib_ui
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Allow custom wheel event processing in ScrollArea.

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This commit is contained in:
John Preston 2023-06-27 19:40:11 +04:00
parent fc8d4d25de
commit 8908c9b5c0
2 changed files with 15 additions and 1 deletions
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11
ui/widgets/scroll_area.cpp
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@ -490,12 +490,21 @@ bool ScrollArea::eventFilter(QObject *obj, QEvent *e) {
}
bool ScrollArea::viewportEvent(QEvent *e) {
if (e->type() == QEvent::TouchBegin || e->type() == QEvent::TouchUpdate || e->type() == QEvent::TouchEnd || e->type() == QEvent::TouchCancel) {
const auto type = e->type();
if (type == QEvent::TouchBegin
|| type == QEvent::TouchUpdate
|| type == QEvent::TouchEnd
|| type == QEvent::TouchCancel) {
QTouchEvent *ev = static_cast<QTouchEvent*>(e);
if (_touchEnabled && ev->device()->type() == base::TouchDevice::TouchScreen) {
touchEvent(ev);
return true;
}
} else if (type == QEvent::Wheel) {
if (_customWheelProcess
&& _customWheelProcess(static_cast<QWheelEvent*>(e))) {
return true;
}
}
return QScrollArea::viewportEvent(e);
}

5
ui/widgets/scroll_area.h
View file

@ -172,6 +172,10 @@ public:
void scrolled();
void innerResized();
void setCustomWheelProcess(Fn<bool(not_null<QWheelEvent*>)> process) {
_customWheelProcess = std::move(process);
}
[[nodiscard]] rpl::producer<> scrolls() const;
[[nodiscard]] rpl::producer<> innerResizes() const;
[[nodiscard]] rpl::producer<> geometryChanged() const;
@ -227,6 +231,7 @@ private:
crl::time _touchTime = 0;
base::Timer _touchScrollTimer;
Fn<bool(not_null<QWheelEvent*>)> _customWheelProcess;
bool _widgetAcceptsTouch = false;
object_ptr<QWidget> _widget = { nullptr };