Fixed scroll hand drag mode.
--HG-- branch : release
This commit is contained in:
parent
78bdd5a8af
commit
6d271423e0
|
@ -343,9 +343,12 @@ bool GraphicsViewZoom::StartHorizontalScrollings(QWheelEvent *wheel_event)
|
|||
* @param parent parent object.
|
||||
*/
|
||||
VMainGraphicsView::VMainGraphicsView(QWidget *parent)
|
||||
:QGraphicsView(parent), zoom(nullptr), showToolOptions(true), isAllowRubberBand(true)
|
||||
: QGraphicsView(parent),
|
||||
zoom(new GraphicsViewZoom(this)),
|
||||
showToolOptions(true),
|
||||
isAllowRubberBand(true),
|
||||
m_ptStartPos()
|
||||
{
|
||||
zoom = new GraphicsViewZoom(this);
|
||||
this->setResizeAnchor(QGraphicsView::AnchorUnderMouse);
|
||||
this->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
|
||||
this->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
|
||||
|
@ -423,9 +426,9 @@ void VMainGraphicsView::ZoomFitBest()
|
|||
* @brief mousePressEvent handle mouse press events.
|
||||
* @param mousePress mouse press event.
|
||||
*/
|
||||
void VMainGraphicsView::mousePressEvent(QMouseEvent *mousePress)
|
||||
void VMainGraphicsView::mousePressEvent(QMouseEvent *event)
|
||||
{
|
||||
switch (mousePress->button())
|
||||
switch (event->button())
|
||||
{
|
||||
case Qt::LeftButton:
|
||||
{
|
||||
|
@ -435,7 +438,7 @@ void VMainGraphicsView::mousePressEvent(QMouseEvent *mousePress)
|
|||
}
|
||||
if (showToolOptions)
|
||||
{
|
||||
QList<QGraphicsItem *> list = items(mousePress->pos());
|
||||
QList<QGraphicsItem *> list = items(event->pos());
|
||||
if (list.size() == 0)
|
||||
{
|
||||
emit itemClicked(nullptr);
|
||||
|
@ -462,17 +465,38 @@ void VMainGraphicsView::mousePressEvent(QMouseEvent *mousePress)
|
|||
}
|
||||
case Qt::MiddleButton:
|
||||
{
|
||||
QGraphicsView::setDragMode(QGraphicsView::ScrollHandDrag);
|
||||
// create a new mouse event that simulates a click of the left button instead of the middle button
|
||||
QMouseEvent mouseEvent (mousePress->type(), mousePress->pos(), Qt::LeftButton, Qt::LeftButton,
|
||||
mousePress->modifiers());
|
||||
QGraphicsView::mousePressEvent(&mouseEvent);
|
||||
return;
|
||||
const QList<QGraphicsItem *> list = items(event->pos());
|
||||
if (list.size() == 0)
|
||||
{// Only when the user clicks on the scene background
|
||||
m_ptStartPos = event->pos();
|
||||
QGraphicsView::setDragMode(QGraphicsView::ScrollHandDrag);
|
||||
event->accept();
|
||||
viewport()->setCursor(Qt::ClosedHandCursor);
|
||||
}
|
||||
break;
|
||||
}
|
||||
default:
|
||||
break;
|
||||
}
|
||||
QGraphicsView::mousePressEvent(mousePress);
|
||||
QGraphicsView::mousePressEvent(event);
|
||||
}
|
||||
|
||||
//---------------------------------------------------------------------------------------------------------------------
|
||||
void VMainGraphicsView::mouseMoveEvent(QMouseEvent *event)
|
||||
{
|
||||
if (dragMode() == QGraphicsView::ScrollHandDrag)
|
||||
{
|
||||
QScrollBar *hBar = horizontalScrollBar();
|
||||
QScrollBar *vBar = verticalScrollBar();
|
||||
const QPoint delta = event->pos() - m_ptStartPos;
|
||||
hBar->setValue(hBar->value() + (isRightToLeft() ? delta.x() : -delta.x()));
|
||||
vBar->setValue(vBar->value() - delta.y());
|
||||
m_ptStartPos = event->pos();
|
||||
}
|
||||
else
|
||||
{
|
||||
QGraphicsView::mouseMoveEvent(event);
|
||||
}
|
||||
}
|
||||
|
||||
//---------------------------------------------------------------------------------------------------------------------
|
||||
|
|
|
@ -143,13 +143,15 @@ public slots:
|
|||
void ZoomOriginal();
|
||||
void ZoomFitBest();
|
||||
protected:
|
||||
virtual void mousePressEvent(QMouseEvent *mousePress) Q_DECL_OVERRIDE;
|
||||
virtual void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
|
||||
virtual void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
|
||||
virtual void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
|
||||
private:
|
||||
Q_DISABLE_COPY(VMainGraphicsView)
|
||||
GraphicsViewZoom* zoom;
|
||||
bool showToolOptions;
|
||||
bool isAllowRubberBand;
|
||||
bool showToolOptions;
|
||||
bool isAllowRubberBand;
|
||||
QPoint m_ptStartPos;
|
||||
};
|
||||
|
||||
#endif // VMAINGRAPHICSVIEW_H
|
||||
|
|
Loading…
Reference in New Issue
Block a user