* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <QApplication>
+#include <QMouseEvent>
+
+#include "rowitem.hpp"
#include "view.hpp"
#include "viewwidget.hpp"
+using std::any_of;
+using std::shared_ptr;
+using std::vector;
+
namespace pv {
namespace view {
ViewWidget::ViewWidget(View &parent) :
QWidget(&parent),
- view_(parent)
+ view_(parent),
+ item_dragging_(false)
+{
+ setFocusPolicy(Qt::ClickFocus);
+ setMouseTracking(true);
+}
+
+void ViewWidget::clear_selection()
+{
+ const auto items = this->items();
+ for (auto &i : items)
+ i->select(false);
+ update();
+}
+
+void ViewWidget::item_clicked(const shared_ptr<ViewItem> &item)
+{
+ (void)item;
+}
+
+bool ViewWidget::accept_drag() const
+{
+ const vector< shared_ptr<TimeItem> > items(view_.time_items());
+
+ const bool any_row_items_selected = any_of(view_.begin(), view_.end(),
+ [](const shared_ptr<RowItem> &r) { return r->selected(); });
+
+ const bool any_time_items_selected = any_of(items.begin(), items.end(),
+ [](const shared_ptr<TimeItem> &i) { return i->selected(); });
+
+ if (any_row_items_selected && !any_time_items_selected)
+ {
+ // Check all the drag items share a common owner
+ RowItemOwner *item_owner = nullptr;
+ for (shared_ptr<RowItem> r : view_)
+ if (r->dragging()) {
+ if (!item_owner)
+ item_owner = r->owner();
+ else if(item_owner != r->owner())
+ return false;
+ }
+
+ return true;
+ }
+ else if (any_time_items_selected && !any_row_items_selected)
+ {
+ return true;
+ }
+
+ return false;
+}
+
+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)
+{
+ // Drag the row items
+ RowItemOwner *item_owner = nullptr;
+ for (std::shared_ptr<RowItem> r : view_)
+ if (r->dragging()) {
+ item_owner = r->owner();
+ r->drag_by(delta);
+
+ // Ensure the trace is selected
+ r->select();
+ }
+
+ if (item_owner) {
+ item_owner->restack_items();
+ for (const auto &r : *item_owner)
+ r->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);
+}
+
+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
+ const auto items = this->items();
+ for (auto &i : items)
+ if (i->selected())
+ i->drag();
+
+ selection_changed();
+ update();
+}
+
+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_row_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;
+}
+
+void ViewWidget::mousePressEvent(QMouseEvent *event)
+{
+ assert(event);
+
+ mouse_down_point_ = event->pos();
+ mouse_down_item_ = get_mouse_over_item(event->pos());
+
+ if (event->button() & Qt::LeftButton)
+ mouse_left_press_event(event);
+}
+
+void ViewWidget::mouseReleaseEvent(QMouseEvent *event)
+{
+ assert(event);
+ if (event->button() & Qt::LeftButton)
+ mouse_left_release_event(event);
+
+ mouse_down_point_ = QPoint(INT_MIN, INT_MIN);
+ mouse_down_item_ = nullptr;
+}
+
+void ViewWidget::mouseMoveEvent(QMouseEvent *event)
+{
+ assert(event);
+ mouse_point_ = event->pos();
+
+ if (!(event->buttons() & Qt::LeftButton))
+ return;
+
+ if ((event->pos() - mouse_down_point_).manhattanLength() <
+ QApplication::startDragDistance())
+ return;
+
+ if (!accept_drag())
+ return;
+
+ // Do the drag
+ item_dragging_ = true;
+ drag_items(event->pos() - mouse_down_point_);
+
+ update();
+}
+
+void ViewWidget::leaveEvent(QEvent*)
{
+ mouse_point_ = QPoint(-1, -1);
+ update();
}
} // namespace view
projects / pulseview.git / blobdiff