+ // A background drag is beginning
+ return true;
+}
+
+bool ViewWidget::mouse_down() const
+{
+ return mouse_down_point_.x() != INT_MIN &&
+ mouse_down_point_.y() != INT_MIN;
+}
+
+void ViewWidget::drag_items(const QPoint &delta)
+{
+ bool item_dragged = false;
+
+ // Drag the row items
+ const vector< shared_ptr<RowItem> > row_items(
+ view_.list_by_type<RowItem>());
+ for (shared_ptr<RowItem> r : row_items)
+ if (r->dragging()) {
+ r->drag_by(delta);
+
+ // Ensure the trace is selected
+ r->select();
+
+ item_dragged = true;
+ }
+
+ // If an item is being dragged, update the stacking
+ TraceTreeItemOwner *item_owner = nullptr;
+ const vector< shared_ptr<TraceTreeItem> > trace_tree_items(
+ view_.list_by_type<TraceTreeItem>());
+ for (shared_ptr<TraceTreeItem> i : trace_tree_items)
+ if (i->dragging())
+ item_owner = i->owner();
+
+ if (item_owner) {
+ item_owner->restack_items();
+ for (shared_ptr<TraceTreeItem> i : trace_tree_items)
+ i->animate_to_layout_v_offset();
+ }
+
+ // Drag the time items
+ const vector< shared_ptr<TimeItem> > items(view_.time_items());
+ for (auto &i : items)
+ if (i->dragging()) {
+ i->drag_by(delta);
+ item_dragged = true;
+ }
+
+ // Do the background drag
+ if (!item_dragged)
+ drag_by(delta);
+}
+
+void ViewWidget::drag()
+{
+}
+
+void ViewWidget::drag_by(const QPoint &delta)
+{
+ (void)delta;
+}
+
+void ViewWidget::drag_release()
+{
+}
+
+void ViewWidget::mouse_left_press_event(QMouseEvent *event)
+{
+ (void)event;
+
+ const bool ctrl_pressed =
+ QApplication::keyboardModifiers() & Qt::ControlModifier;
+
+ // Clear selection if control is not pressed and this item is unselected
+ if ((!mouse_down_item_ || !mouse_down_item_->selected()) &&
+ !ctrl_pressed)
+ clear_selection();
+
+ // Set the signal selection state if the item has been clicked
+ if (mouse_down_item_) {
+ if (ctrl_pressed)
+ mouse_down_item_->select(!mouse_down_item_->selected());
+ else
+ mouse_down_item_->select(true);
+ }
+
+ // Save the offsets of any signals which will be dragged
+ bool item_dragged = false;
+ const auto items = this->items();
+ for (auto &i : items)
+ if (i->selected()) {
+ item_dragged = true;
+ i->drag();
+ }
+
+ // Do the background drag
+ if (!item_dragged)
+ drag();
+
+ selection_changed();
+}
+
+void ViewWidget::mouse_left_release_event(QMouseEvent *event)
+{
+ assert(event);
+
+ auto items = this->items();
+ const bool ctrl_pressed =
+ QApplication::keyboardModifiers() & Qt::ControlModifier;
+
+ // Unselect everything if control is not pressed
+ const shared_ptr<ViewItem> mouse_over =
+ get_mouse_over_item(event->pos());
+
+ for (auto &i : items)
+ i->drag_release();
+
+ if (item_dragging_)
+ view_.restack_all_trace_tree_items();
+ else
+ {
+ if (!ctrl_pressed) {
+ for (shared_ptr<ViewItem> i : items)
+ if (mouse_down_item_ != i)
+ i->select(false);
+
+ if (mouse_down_item_)
+ item_clicked(mouse_down_item_);
+ }
+ }
+
+ item_dragging_ = false;
+}
+
+bool ViewWidget::touch_event(QTouchEvent *e)
+{
+ (void)e;