X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fview%2Fviewwidget.cpp;h=e2b2d17295f3295bc429f550548d95545c3ca1f3;hp=357b6fea5648d3f3dba4908b9d04c22624a6d266;hb=1f1edc092680e9182be07a760ad03d00b8c5ca06;hpb=40aca27ed83559f7f79873e353f64d2c36a18fce

diff --git a/pv/view/viewwidget.cpp b/pv/view/viewwidget.cpp
index 357b6fea..e2b2d172 100644
--- a/pv/view/viewwidget.cpp
+++ b/pv/view/viewwidget.cpp
@@ -18,16 +18,215 @@
  * 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