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#12434 add event handler for pinch-to-zoom gesture
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@ -110,6 +110,8 @@
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#include <QTimer>
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#include <QUrl>
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#include <QWindowStateChangeEvent>
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#include <QGestureEvent>
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#include <QPinchGesture>
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// sync with GuiAlert.cpp
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@ -694,6 +696,9 @@ GuiView::GuiView(int id)
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connect(statusBar(), SIGNAL(customContextMenuRequested(QPoint)),
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this, SLOT(showZoomContextMenu()));
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// enable pinch to zoom
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grabGesture(Qt::PinchGesture);
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int const iconheight = max(int(d.normalIconSize), fm.height());
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QSize const iconsize(iconheight, iconheight);
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@ -1621,6 +1626,21 @@ bool GuiView::event(QEvent * e)
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return QMainWindow::event(e);
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}
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case QEvent::Gesture: {
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QGestureEvent *ge = static_cast<QGestureEvent*>(e);
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QGesture *gp = ge->gesture(Qt::PinchGesture);
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if (gp) {
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QPinchGesture *pinch = static_cast<QPinchGesture *>(gp);
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QPinchGesture::ChangeFlags changeFlags = pinch->changeFlags();
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if (changeFlags & QPinchGesture::ScaleFactorChanged) {
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qreal factor = lyxrc.currentZoom*pinch->scaleFactor();
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//factor = ceil(factor/20)*20;
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zoomValueChanged(factor);
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}
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}
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return QMainWindow::event(e);
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}
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default:
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return QMainWindow::event(e);
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}
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