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Code Issues Releases Wiki Activity

PR #1954 improvements.

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Inverted the direction of move-by-wheel, so that scrolling down will
move you forward through the photos or documents overview.

Added an accumulation of the scroll amount so that you don't zoom or
skip photos each time a (possibly very frequent) wheel event fires.
This commit is contained in:
John Preston
2016-09-14 19:05:40 +03:00
parent e623d05e37
commit a7b692e8ed
2 changed files with 21 additions and 12 deletions
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31
Telegram/SourceFiles/mediaview.cpp
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@@ -1890,20 +1890,27 @@ void MediaView::keyPressEvent(QKeyEvent *e) {
}
void MediaView::wheelEvent(QWheelEvent *e) {
if (e->delta() < 0) {
if (e->modifiers().testFlag(Qt::ControlModifier)) {
zoomOut();
} else {
if (e->source() == Qt::MouseEventNotSynthesized) {
moveToNext(-1);
constexpr auto step = static_cast<int>(QWheelEvent::DefaultDeltasPerStep);
_verticalWheelDelta += e->angleDelta().y();
while (qAbs(_verticalWheelDelta) >= step) {
if (_verticalWheelDelta < 0) {
_verticalWheelDelta += step;
if (e->modifiers().testFlag(Qt::ControlModifier)) {
zoomOut();
} else {
if (e->source() == Qt::MouseEventNotSynthesized) {
moveToNext(1);
}
}
}
} else {
if (e->modifiers().testFlag(Qt::ControlModifier)) {
zoomIn();
} else {
if (e->source() == Qt::MouseEventNotSynthesized) {
moveToNext(1);
_verticalWheelDelta -= step;
if (e->modifiers().testFlag(Qt::ControlModifier)) {
zoomIn();
} else {
if (e->source() == Qt::MouseEventNotSynthesized) {
moveToNext(-1);
}
}
}
}