QVariant MInverseMouseArea::itemChange(GraphicsItemChange change, const QVariant &value)
{
switch (change) {
case QGraphicsItem::ItemSceneChange: {
QGraphicsScene *oldScene = scene();
if (oldScene)
oldScene->removeEventFilter(this);
m_pressed = false;
if (value.canConvert<QGraphicsScene *>()) {
QGraphicsScene *newScene = value.value<QGraphicsScene *>();
if (newScene)
newScene->installEventFilter(this);
}
break;
}
case QGraphicsItem::ItemVisibleHasChanged: {
if (!isVisible())
m_pressed = false;
break;
}
default:
break;
}
return QDeclarativeItem::itemChange(change, value);
}
void ArrangementDemoWindow::removeCallback( unsigned int tabIndex )
{
if (tabIndex == static_cast<unsigned int>(-1)) return;
ArrangementDemoTabBase* activeTab = this->tabs[ tabIndex ];
QGraphicsScene* activeScene = activeTab->getScene( );
QGraphicsView* activeView = activeTab->getView( );
#if 0
QAction* activeMode = this->activeModes[ tabIndex ];
#endif
activeScene->removeEventFilter( activeTab->getCurveInputCallback( ) );
activeView->setDragMode( QGraphicsView::NoDrag );
activeScene->removeEventFilter( activeTab->getDeleteCurveCallback( ) );
activeScene->removeEventFilter( activeTab->getPointLocationCallback( ) );
activeScene->removeEventFilter( activeTab->getVerticalRayShootCallback( ) );
activeScene->removeEventFilter( activeTab->getMergeEdgeCallback( ) );
activeScene->removeEventFilter( activeTab->getSplitEdgeCallback( ) );
activeScene->removeEventFilter( activeTab->getVerticalRayShootCallback( ) );
activeScene->removeEventFilter( activeTab->getFillFaceCallback( ) );
// unhook the old active mode
#if 0
if ( activeMode == this->ui->actionInsert )
{
activeScene->removeEventFilter( activeTab->getCurveInputCallback( ) );
}
else if ( activeMode == this->ui->actionDrag )
{
activeView->setDragMode( QGraphicsView::NoDrag );
}
else if ( activeMode == this->ui->actionDelete )
{
activeScene->removeEventFilter( activeTab->getDeleteCurveCallback( ) );
}
else if ( activeMode == this->ui->actionPointLocation )
{
activeScene->removeEventFilter( activeTab->getPointLocationCallback( ) );
}
else if ( activeMode == this->ui->actionRayShootingUp )
{
activeScene->removeEventFilter( activeTab->getVerticalRayShootCallback( ) );
}
else if ( activeMode == this->ui->actionRayShootingDown )
{
activeScene->removeEventFilter( activeTab->getVerticalRayShootCallback( ) );
}
else if ( activeMode == this->ui->actionMerge )
{
activeScene->removeEventFilter( activeTab->getMergeEdgeCallback( ) );
}
else if ( activeMode == this->ui->actionSplit )
{
activeScene->removeEventFilter( activeTab->getSplitEdgeCallback( ) );
}
#endif
}
