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55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
#include <QGraphicsSceneHelpEvent>
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#include <QGraphicsView>
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#include "popup.h"
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#include "graphicsscene.h"
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/* Standard GraphicsScene::items() is not pixel accurate, so we use the
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following function which has the same logic as used in the original
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QGraphicsScene::helpEvent() function. */
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QList<QGraphicsItem *> GraphicsScene::itemsAtPosition(const QPoint &screenPos,
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const QPointF &scenePos, QWidget *widget) const
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{
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QGraphicsView *view = widget
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? qobject_cast<QGraphicsView *>(widget->parentWidget()) : 0;
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if (!view)
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return items(scenePos, Qt::IntersectsItemShape, Qt::DescendingOrder,
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QTransform());
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const QRectF pointRect(QPointF(widget->mapFromGlobal(screenPos)),
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QSizeF(1, 1));
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if (!view->isTransformed())
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return items(pointRect, Qt::IntersectsItemShape, Qt::DescendingOrder);
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const QTransform viewTransform = view->viewportTransform();
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if (viewTransform.type() <= QTransform::TxScale)
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return items(viewTransform.inverted().mapRect(pointRect),
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Qt::IntersectsItemShape, Qt::DescendingOrder, viewTransform);
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return items(viewTransform.inverted().map(pointRect),
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Qt::IntersectsItemShape, Qt::DescendingOrder, viewTransform);
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}
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void GraphicsScene::helpEvent(QGraphicsSceneHelpEvent *event)
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{
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QList<QGraphicsItem *> list = itemsAtPosition(event->screenPos(),
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event->scenePos(), event->widget());
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for (int i = 0; i < list.size(); i++) {
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if (list.at(i)->type() == QGraphicsItem::UserType + 1) {
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GraphicsItem *mi = static_cast<GraphicsItem*>(list.at(i));
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Popup::show(event->screenPos(), mi->info(), event->widget());
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return;
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}
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}
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/* No need to process QGraphicsScene::helpEvent() */
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}
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void GraphicsScene::clear()
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{
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Popup::clear();
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QGraphicsScene::clear();
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}
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