/*!
\reimp
*/
QItemSelection QIdentityProxyModel::mapSelectionToSource(const QItemSelection& selection) const
{
Q_D(const QIdentityProxyModel);
QItemSelection sourceSelection;
if (!d->model)
return sourceSelection;
QItemSelection::const_iterator it = selection.constBegin();
const QItemSelection::const_iterator end = selection.constEnd();
for ( ; it != end; ++it) {
Q_ASSERT(it->model() == this);
const QItemSelectionRange range(mapToSource(it->topLeft()), mapToSource(it->bottomRight()));
sourceSelection.append(range);
}
return sourceSelection;
}
/** @short Reimplemented to show custom pixmap during drag&drop
Qt's model-view classes don't provide any means of interfering with the
QDrag's pixmap so we just rip off QAbstractItemView::startDrag and provide
our own QPixmap.
*/
void MsgListView::startDrag(Qt::DropActions supportedActions)
{
// indexes for column 0, i.e. subject
QModelIndexList baseIndexes;
Q_FOREACH(const QModelIndex &index, selectedIndexes()) {
if (!(model()->flags(index) & Qt::ItemIsDragEnabled))
continue;
if (index.column() == Imap::Mailbox::MsgListModel::SUBJECT)
baseIndexes << index;
}
if (!baseIndexes.isEmpty()) {
QMimeData *data = model()->mimeData(baseIndexes);
if (!data)
return;
// use screen width and itemDelegate()->sizeHint() to determine size of the pixmap
int screenWidth = QApplication::desktop()->screenGeometry(this).width();
int maxWidth = qMax(400, screenWidth / 4);
QSize size(maxWidth, 0);
// Show a "+ X more items" text after so many entries
const int maxItems = 20;
QStyleOptionViewItem opt;
opt.initFrom(this);
opt.rect.setWidth(maxWidth);
opt.rect.setHeight(itemDelegate()->sizeHint(opt, baseIndexes.at(0)).height());
size.setHeight(qMin(maxItems + 1, baseIndexes.size()) * opt.rect.height());
// State_Selected provides for nice background of the items
opt.state |= QStyle::State_Selected;
// paint list of selected items using itemDelegate() to be consistent with style
QPixmap pixmap(size);
pixmap.fill(Qt::transparent);
QPainter p(&pixmap);
for (int i = 0; i < baseIndexes.size(); ++i) {
opt.rect.moveTop(i * opt.rect.height());
if (i == maxItems) {
p.fillRect(opt.rect, palette().color(QPalette::Disabled, QPalette::Highlight));
p.setBrush(palette().color(QPalette::Disabled, QPalette::HighlightedText));
p.drawText(opt.rect, Qt::AlignRight, tr("+ %n additional item(s)", 0, baseIndexes.size() - maxItems));
break;
}
itemDelegate()->paint(&p, opt, baseIndexes.at(i));
}
QDrag *drag = new QDrag(this);
drag->setPixmap(pixmap);
drag->setMimeData(data);
drag->setHotSpot(QPoint(0, 0));
Qt::DropAction dropAction = Qt::IgnoreAction;
if (defaultDropAction() != Qt::IgnoreAction && (supportedActions & defaultDropAction()))
dropAction = defaultDropAction();
else if (supportedActions & Qt::CopyAction && dragDropMode() != QAbstractItemView::InternalMove)
dropAction = Qt::CopyAction;
if (drag->exec(supportedActions, dropAction) == Qt::MoveAction) {
// QAbstractItemView::startDrag calls d->clearOrRemove() here, so
// this is a copy of QAbstractItemModelPrivate::clearOrRemove();
const QItemSelection selection = selectionModel()->selection();
QList<QItemSelectionRange>::const_iterator it = selection.constBegin();
if (!dragDropOverwriteMode()) {
for (; it != selection.constEnd(); ++it) {
QModelIndex parent = it->parent();
if (it->left() != 0)
continue;
if (it->right() != (model()->columnCount(parent) - 1))
continue;
int count = it->bottom() - it->top() + 1;
model()->removeRows(it->top(), count, parent);
}
} else {
// we can't remove the rows so reset the items (i.e. the view is like a table)
QModelIndexList list = selection.indexes();
for (int i = 0; i < list.size(); ++i) {
QModelIndex index = list.at(i);
QMap<int, QVariant> roles = model()->itemData(index);
for (QMap<int, QVariant>::Iterator it = roles.begin(); it != roles.end(); ++it)
it.value() = QVariant();
model()->setItemData(index, roles);
}
}
}
}
}
void MacroTreeView::startDrag(Qt::DropActions supportedActions)
{
QModelIndexList indexes = selectionModel()->selectedRows();
for(int i = indexes.count() - 1 ; i >= 0; --i)
{
if (!(indexes.at(i).isValid()) || !(model()->flags(indexes.at(i)) & Qt::ItemIsDragEnabled))
{
indexes.removeAt(i);
}
}
if (indexes.count() > 0)
{
QMimeData *data = model()->mimeData(indexes);
if (!data)
{
return;
}
QPixmap dragPixmap(":/icons/resources/macro.png");
QModelIndex srcIndex = dynamic_cast<QSortFilterProxyModel*>(model())->mapToSource(indexes[0]);
const ModelItemMacro* item = static_cast<const ModelItemMacro*>(srcIndex.internalPointer());
graph::Vertex::Ptr dummyVertex = app::MacroManager::instance().createVertexInstance(item->macro().signature());
if (!dummyVertex.isNull())
{
graph::VertexItem::Ptr vertexItem = dummyVertex->sceneItem().staticCast<graph::VertexItem>();
if (!vertexItem.isNull())
{
dragPixmap = vertexItem->paintToPixmap();
}
app::MacroManager::instance().deleteVertexInstance(dummyVertex);
}
data->setImageData(dragPixmap.toImage());
QDrag* dragObjectPtr = new QDrag(this);
dragObjectPtr->setPixmap(dragPixmap);
dragObjectPtr->setMimeData(data);
dragObjectPtr->setHotSpot(dragPixmap.rect().center());
Qt::DropAction defDropAction = Qt::IgnoreAction;
if (defaultDropAction() != Qt::IgnoreAction && (supportedActions & defaultDropAction()))
{
defDropAction = defaultDropAction();
}
else if (supportedActions & Qt::CopyAction && dragDropMode() != QAbstractItemView::InternalMove)
{
defDropAction = Qt::CopyAction;
}
if (dragObjectPtr->exec(supportedActions, defDropAction) == Qt::MoveAction)
{
// clear or remove dragged items
const QItemSelection selection = selectionModel()->selection();
QList<QItemSelectionRange>::const_iterator it = selection.constBegin();
if (!dragDropOverwriteMode())
{
for (; it != selection.constEnd(); ++it)
{
QModelIndex parent = (*it).parent();
if ((*it).left() != 0)
continue;
if ((*it).right() != (model()->columnCount(parent) - 1))
continue;
int count = (*it).bottom() - (*it).top() + 1;
model()->removeRows((*it).top(), count, parent);
}
}
else
{
QModelIndexList list = selection.indexes();
for (int i=0; i < list.size(); ++i)
{
QModelIndex index = list.at(i);
QMap<int, QVariant> roles = model()->itemData(index);
for (QMap<int, QVariant>::Iterator it = roles.begin(); it != roles.end(); ++it)
{
it.value() = QVariant();
}
model()->setItemData(index, roles);
}
}
}
}
}
