Mirrors/inspectrum
2
0
Fork 0
mirror of https://github.com/miek/inspectrum.git synced 2026-03-04 07:24:21 +01:00
Code Issues Packages Projects Releases Wiki Activity

Handle zoom events before parent to prevent normal scrolling

Browse Source
This commit is contained in:
Mike Walters
2017-02-03 15:21:10 +00:00
parent 62eb5c991d
commit 87d52d5274
1 changed files with 15 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
plotview.cpp
View File

@@ -166,7 +166,22 @@ void PlotView::enableCursors(bool enabled)
}
bool PlotView::viewportEvent(QEvent *event) {
// Handle wheel events for zooming (before the parent's handler to stop normal scrolling)
if (event->type() == QEvent::Wheel) {
QWheelEvent *wheelEvent = (QWheelEvent*)event;
if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
if (wheelEvent->angleDelta().y() > 0) {
emit zoomIn();
} else if (wheelEvent->angleDelta().y() < 0) {
emit zoomOut();
}
return true;
}
}
// Handle parent eveents
QAbstractScrollArea::viewportEvent(event);
// Pass mouse events to individual plot objects
if (event->type() == QEvent::MouseButtonPress ||
event->type() == QEvent::MouseMove ||
@@ -196,19 +211,6 @@ bool PlotView::viewportEvent(QEvent *event) {
if (cursors.mouseEvent(event->type(), *mouseEvent))
return true;
}
// Handle wheel events for zooming
if (event->type() == QEvent::Wheel) {
QWheelEvent *wheelEvent = (QWheelEvent*)event;
if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
if (wheelEvent->angleDelta().y() > 0) {
emit zoomIn();
} else if (wheelEvent->angleDelta().y() < 0) {
emit zoomOut();
}
return true;
}
}
return false;
}