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Handle the tooltips pixel accurate

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This commit is contained in:
Martin Tůma 2019-10-16 19:22:55 +02:00
parent 9c96e7124a
commit 0c1a123cd9
3 changed files with 55 additions and 13 deletions
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3
gpxsee.pro
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@ -320,7 +320,8 @@ SOURCES += src/main.cpp \
src/GUI/pathtickitem.cpp \
src/map/IMG/textitem.cpp \
src/data/csv.cpp \
src/data/cupparser.cpp
src/data/cupparser.cpp \
src/GUI/graphicsscene.cpp
greaterThan(QT_MAJOR_VERSION, 4) {
HEADERS += src/data/geojsonparser.h

48
src/GUI/graphicsscene.cpp Normal file
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@ -0,0 +1,48 @@
#include <QGraphicsSceneHelpEvent>
#include <QGraphicsView>
#include "popup.h"
#include "graphicsscene.h"
/* Standard GraphicsScene::items() is not pixel accurate, so we use the
following function which has the same logic as used in the original
QGraphicsScene::helpEvent() function. */
QList<QGraphicsItem *> GraphicsScene::itemsAtPosition(const QPoint &screenPos,
const QPointF &scenePos, QWidget *widget) const
{
QGraphicsView *view = widget
? qobject_cast<QGraphicsView *>(widget->parentWidget()) : 0;
if (!view)
return items(scenePos, Qt::IntersectsItemShape, Qt::DescendingOrder,
QTransform());
const QRectF pointRect(QPointF(widget->mapFromGlobal(screenPos)),
QSizeF(1, 1));
if (!view->isTransformed())
return items(pointRect, Qt::IntersectsItemShape, Qt::DescendingOrder);
const QTransform viewTransform = view->viewportTransform();
if (viewTransform.type() <= QTransform::TxScale)
return items(viewTransform.inverted().mapRect(pointRect),
Qt::IntersectsItemShape, Qt::DescendingOrder, viewTransform);
return items(viewTransform.inverted().map(pointRect),
Qt::IntersectsItemShape, Qt::DescendingOrder, viewTransform);
}
void GraphicsScene::helpEvent(QGraphicsSceneHelpEvent *event)
{
QList<QGraphicsItem *> list = itemsAtPosition(event->screenPos(),
event->scenePos(), event->widget());
for (int i = 0; i < list.size(); i++) {
if (list.at(i)->type() == QGraphicsItem::UserType + 1) {
GraphicsItem *mi = static_cast<GraphicsItem*>(list.at(i));
Popup::show(event->screenPos(), mi->info(), event->widget());
return;
}
}
/* No need to process QGraphicsScene::helpEvent() */
}

17
src/GUI/graphicsscene.h
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@ -3,9 +3,6 @@
#include <QGraphicsScene>
#include <QGraphicsItem>
#include <QGraphicsSceneHelpEvent>
#include <QWidget>
#include "popup.h"
class GraphicsItem : public QGraphicsItem
{
@ -22,15 +19,11 @@ public:
GraphicsScene(QObject *parent = 0) : QGraphicsScene(parent) {}
protected:
void helpEvent(QGraphicsSceneHelpEvent *event)
{
QGraphicsItem *item = itemAt(event->scenePos(), QTransform());
if (item && item->type() == QGraphicsItem::UserType + 1) {
GraphicsItem *mi = static_cast<GraphicsItem*>(item);
Popup::show(event->screenPos(), mi->info(),
static_cast<QWidget*>(parent()));
}
}
void helpEvent(QGraphicsSceneHelpEvent *event);
private:
QList<QGraphicsItem *> itemsAtPosition(const QPoint &screenPos,
const QPointF &scenePos, QWidget *widget) const;
};
#endif // GRAPHICSSCENE_H