tdf#140463 Qt handle mouse enter+leave events

Currently just implemented for the QtWidget, but still as a static
function, so it may be used for QtObject at some point too.

But there is no (mouse) enter or leave event function in QWindow,
so no way to handle these there. And since we can't modify the
returned QWidget from QWidget::createWindowContainer, the only way
would be to expand the static QtWidget::handleEvent used by
QtObjectWindow::event ... if it's actually needed at some point.

Change-Id: If9009e5dfca508acd1e702df1a17eb8ad7c29690
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133190
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

1 files changed, 28 insertions, 0 deletions

diff --git a/vcl/qt5/QtWidget.cxx b/vcl/qt5/QtWidget.cxx
index 33320c577f94..2ac27548ac6a 100644
--- a/vcl/qt5/QtWidget.cxx
+++ b/vcl/qt5/QtWidget.cxx
@@ -207,6 +207,34 @@ void QtWidget::mouseMoveEvent(QMouseEvent* pEvent)
     pEvent->accept();
 }
 
+void QtWidget::handleMouseEnterLeaveEvents(const QtFrame& rFrame, QEvent* pQEvent)
+{
+    const qreal fRatio = rFrame.devicePixelRatioF();
+    const QWidget* pWidget = rFrame.GetQWidget();
+    const Point aPos = toPoint(pWidget->mapFromGlobal(QCursor::pos()) * fRatio);
+
+    SalMouseEvent aEvent;
+    aEvent.mnX
+        = QGuiApplication::isLeftToRight() ? aPos.X() : round(pWidget->width() * fRatio) - aPos.X();
+    aEvent.mnY = aPos.Y();
+    aEvent.mnTime = 0;
+    aEvent.mnButton = 0;
+    aEvent.mnCode = GetKeyModCode(QGuiApplication::keyboardModifiers())
+                    | GetMouseModCode(QGuiApplication::mouseButtons());
+
+    SalEvent nEventType;
+    if (pQEvent->type() == QEvent::Enter)
+        nEventType = SalEvent::MouseMove;
+    else
+        nEventType = SalEvent::MouseLeave;
+    rFrame.CallCallback(nEventType, &aEvent);
+    pQEvent->accept();
+}
+
+void QtWidget::leaveEvent(QEvent* pEvent) { handleMouseEnterLeaveEvents(m_rFrame, pEvent); }
+
+void QtWidget::enterEvent(QEvent* pEvent) { handleMouseEnterLeaveEvents(m_rFrame, pEvent); }
+
 void QtWidget::wheelEvent(QWheelEvent* pEvent)
 {
     SalWheelMouseEvent aEvent;