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Ignore horizontal wheel scrolling in workarea

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We do not know what to do with horizontal scrolling events, so we ignore them.

Note that the code has to be different between Qt4 and Qt5.

Fixes bug #11257.
This commit is contained in:
Jean-Marc Lasgouttes 2018-09-20 23:21:41 +02:00
parent 17576fb83b
commit 2cfbc5ecf6
1 changed files with 16 additions and 0 deletions
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16
src/frontends/qt4/GuiWorkArea.cpp
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@ -900,7 +900,23 @@ void GuiWorkArea::wheelEvent(QWheelEvent * ev)
{
// Wheel rotation by one notch results in a delta() of 120 (see
// documentation of QWheelEvent)
// But first we have to ignore horizontal scroll events.
#if QT_VERSION < 0x050000
if (ev->orientation() == Qt::Horizontal) {
ev->accept();
return;
}
double const delta = ev->delta() / 120.0;
#else
QPoint const aDelta = ev->angleDelta();
// skip horizontal wheel event
if (abs(aDelta.x()) > abs(aDelta.y())) {
ev->accept();
return;
}
double const delta = aDelta.y() / 120.0;
#endif
bool zoom = false;
switch (lyxrc.scroll_wheel_zoom) {
case LyXRC::SCROLL_WHEEL_ZOOM_CTRL: