void Util::setDragMode(int mode)
{
if (mode == dragMode()) {
return;
}
QString modeString;
switch(mode) {
case DragGestures:
modeString = "gestures";
break;
case DragScroll:
modeString = "scroll";
break;
case DragSelect:
modeString = "select";
break;
case DragOff:
default:
modeString = "off";
}
setSettingsValue("ui/dragMode", modeString);
emit dragModeChanged();
}
void View::mouseReleaseEvent(QMouseEvent* event)
{
if (event->button() == s_dragMoveButton){
// disable scroll dragging, if it was enabled
if(dragMode()==QGraphicsView::ScrollHandDrag){
QMouseEvent fakeEvent(event->type(), event->pos(), Qt::LeftButton, Qt::LeftButton, event->modifiers());
QGraphicsView::mouseReleaseEvent(&fakeEvent);
}
}
// make sure to reset the drag mode
setDragMode(QGraphicsView::RubberBandDrag);
QGraphicsView::mouseReleaseEvent(event);
}
bool WindowManager::canDrag(QWidget *widget, QWidget *child, const QPoint &position)
{
// retrieve child at given position and check cursor again
if (child && Qt::ArrowCursor!=child->cursor().shape()) {
return false;
}
/*
check against children from which drag should never be enabled,
even if mousePress/Move has been passed to the parent
*/
if (child && (qobject_cast<QComboBox*>(child) || qobject_cast<QProgressBar*>(child))) {
return false;
}
// tool buttons
if (QToolButton *toolButton = qobject_cast<QToolButton*>(widget)) {
if (dragMode() < WM_DRAG_ALL && !isToolBar(widget->parentWidget())) {
return false;
}
return toolButton->autoRaise() && !toolButton->isEnabled();
}
// check menubar
if (QMenuBar *menuBar = qobject_cast<QMenuBar*>(widget)) {
// check if there is an active action
if (menuBar->activeAction() && menuBar->activeAction()->isEnabled()) {
return false;
}
// check if action at position exists and is enabled
if (QAction *action = menuBar->actionAt(position)) {
if (action->isSeparator()) {
return true;
}
if (action->isEnabled()) {
return false;
}
}
// return true in all other cases
return true;
}
bool toolbar=isToolBar(widget);
if (dragMode() < WM_DRAG_MENU_AND_TOOLBAR && toolbar) {
return false;
}
/*
in MINIMAL mode, anything that has not been already accepted
and does not come from a toolbar is rejected
*/
if (dragMode() < WM_DRAG_ALL) {
return toolbar;
}
/* following checks are relevant only for WD_FULL mode */
// tabbar. Make sure no tab is under the cursor
if (QTabBar *tabBar = qobject_cast<QTabBar*>(widget)) {
return -1==tabBar->tabAt(position);
}
/*
check groupboxes
prevent drag if unchecking grouboxes
*/
if (QGroupBox *groupBox = qobject_cast<QGroupBox*>(widget)) {
// non checkable group boxes are always ok
if (!groupBox->isCheckable()) {
return true;
}
// gather options to retrieve checkbox subcontrol rect
QStyleOptionGroupBox opt;
opt.initFrom(groupBox);
if (groupBox->isFlat()) {
opt.features |= QStyleOptionFrameV2::Flat;
}
opt.lineWidth = 1;
opt.midLineWidth = 0;
opt.text = groupBox->title();
opt.textAlignment = groupBox->alignment();
opt.subControls = (QStyle::SC_GroupBoxFrame | QStyle::SC_GroupBoxCheckBox);
if (!groupBox->title().isEmpty()) {
opt.subControls |= QStyle::SC_GroupBoxLabel;
}
opt.state |= (groupBox->isChecked() ? QStyle::State_On : QStyle::State_Off);
// check against groupbox checkbox
if (groupBox->style()->subControlRect(QStyle::CC_GroupBox, &opt, QStyle::SC_GroupBoxCheckBox, groupBox).contains(position)) {
return false;
}
// check against groupbox label
if (!groupBox->title().isEmpty() && groupBox->style()->subControlRect(QStyle::CC_GroupBox, &opt, QStyle::SC_GroupBoxLabel, groupBox).contains(position)) {
return false;
}
return true;
}
// labels
if (QLabel *label = qobject_cast<QLabel*>(widget)) { if (label->textInteractionFlags().testFlag(Qt::TextSelectableByMouse)) {
return false;
}
}
// abstract item views
QAbstractItemView *itemView(NULL);
if ((itemView = qobject_cast<QListView*>(widget->parentWidget())) || (itemView = qobject_cast<QTreeView*>(widget->parentWidget()))) {
if (widget == itemView->viewport()) {
// QListView
if (QFrame::NoFrame!=itemView->frameShape()) {
return false;
} else if (QAbstractItemView::NoSelection!=itemView->selectionMode() &&
QAbstractItemView::SingleSelection!=itemView->selectionMode() &&
itemView->model() && itemView->model()->rowCount()) {
return false;
} else if (itemView->model() && itemView->indexAt(position).isValid()) {
return false;
}
}
} else if ((itemView = qobject_cast<QAbstractItemView*>(widget->parentWidget()))) {
if (widget == itemView->viewport()) {
// QAbstractItemView
if (QFrame::NoFrame!=itemView->frameShape()) {
return false;
} else if (itemView->indexAt(position).isValid()) {
return false;
}
}
}
return true;
}
