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-rw-r--r--src/gui/graphicsview/qgraphicsview.cpp19
1 files changed, 16 insertions, 3 deletions
diff --git a/src/gui/graphicsview/qgraphicsview.cpp b/src/gui/graphicsview/qgraphicsview.cpp
index ffe64aa..3bb40fb 100644
--- a/src/gui/graphicsview/qgraphicsview.cpp
+++ b/src/gui/graphicsview/qgraphicsview.cpp
@@ -1208,6 +1208,11 @@ void QGraphicsView::setTransformationAnchor(ViewportAnchor anchor)
{
Q_D(QGraphicsView);
d->transformationAnchor = anchor;
+
+ // Ensure mouse tracking is enabled in the case we are using AnchorUnderMouse
+ // in order to have up-to-date information for centering the view.
+ if (d->transformationAnchor == AnchorUnderMouse)
+ d->viewport->setMouseTracking(true);
}
/*!
@@ -1235,6 +1240,11 @@ void QGraphicsView::setResizeAnchor(ViewportAnchor anchor)
{
Q_D(QGraphicsView);
d->resizeAnchor = anchor;
+
+ // Ensure mouse tracking is enabled in the case we are using AnchorUnderMouse
+ // in order to have up-to-date information for centering the view.
+ if (d->resizeAnchor == AnchorUnderMouse)
+ d->viewport->setMouseTracking(true);
}
/*!
@@ -2597,9 +2607,12 @@ void QGraphicsView::setupViewport(QWidget *widget)
}
// We are only interested in mouse tracking if items
- // accept hover events or use non-default cursors.
- if (d->scene && (!d->scene->d_func()->allItemsIgnoreHoverEvents
- || !d->scene->d_func()->allItemsUseDefaultCursor)) {
+ // accept hover events or use non-default cursors or if
+ // AnchorUnderMouse is used as transformation or resize anchor.
+ if ((d->scene && (!d->scene->d_func()->allItemsIgnoreHoverEvents
+ || !d->scene->d_func()->allItemsUseDefaultCursor))
+ || d->transformationAnchor == AnchorUnderMouse
+ || d->resizeAnchor == AnchorUnderMouse) {
widget->setMouseTracking(true);
}