Added pv::view::View::normalize_layout to normalize out-of-bounds drags

[pulseview.git] / pv / view / header.cpp

diff --git a/pv/view/header.cpp b/pv/view/header.cpp
index 8434e2c8dc9ffb289c676f338d151793367e5a8e..744e4aff06b2072006c68fe4880b973f195e05d7 100644 (file)
--- a/pv/view/header.cpp
+++ b/pv/view/header.cpp
@@ -54,6 +54,9 @@ Header::Header(View &parent) :
                this, SLOT(on_action_set_name_triggered()));
        connect(_action_set_colour, SIGNAL(triggered()),
                this, SLOT(on_action_set_colour_triggered()));
+
+       connect(&_view, SIGNAL(signals_moved()),
+               this, SLOT(on_signals_moved()));
 }
 
 boost::shared_ptr<pv::view::Signal> Header::get_mouse_over_signal(
@@ -89,6 +92,7 @@ void Header::paintEvent(QPaintEvent *event)
        painter.setRenderHint(QPainter::Antialiasing);
 
        const int v_offset = _view.v_offset();
+       const bool dragging = !_drag_sigs.empty();
        BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
        {
                assert(s);
@@ -97,8 +101,9 @@ void Header::paintEvent(QPaintEvent *event)
                        0, s->get_v_offset() - v_offset,
                        w, View::SignalHeight);
 
-               s->paint_label(painter, signal_heading_rect,
-                       s->pt_in_label_rect(signal_heading_rect, _mouse_point));
+               const bool highlight = !dragging && s->pt_in_label_rect(
+                       signal_heading_rect, _mouse_point);
+               s->paint_label(painter, signal_heading_rect, highlight);
        }
 
        painter.end();
@@ -111,26 +116,87 @@ void Header::mousePressEvent(QMouseEvent *event)
        const vector< shared_ptr<Signal> > &sigs =
                _view.session().get_signals();
 
-       if(~QApplication::keyboardModifiers() & Qt::ControlModifier) {
-               // Unselect all other signals because the Ctrl is not
-               // pressed
+       if(event->button() & Qt::LeftButton) {
+               _mouse_down_point = event->pos();
+
+               // Save the offsets of any signals which will be dragged
                BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
-                       s->select(false);
+                       if(s->selected())
+                               _drag_sigs.push_back(
+                                       make_pair(s, s->get_v_offset()));
        }
 
        // Select the signal if it has been clicked
        const shared_ptr<Signal> mouse_over_signal =
                get_mouse_over_signal(event->pos());
-       if(mouse_over_signal)
-               mouse_over_signal->select(!mouse_over_signal->selected());
+       if(mouse_over_signal) {
+               if(mouse_over_signal->selected())
+                       mouse_over_signal->select(false);
+               else {
+                       mouse_over_signal->select(true);
+
+                       if(~QApplication::keyboardModifiers() &
+                               Qt::ControlModifier)
+                               _drag_sigs.clear();
+
+                       // Add the signal to the drag list
+                       if(event->button() & Qt::LeftButton)
+                               _drag_sigs.push_back(
+                                       make_pair(mouse_over_signal,
+                                       mouse_over_signal->get_v_offset()));
+               }
+       }
+
+       if(~QApplication::keyboardModifiers() & Qt::ControlModifier) {
+               // Unselect all other signals because the Ctrl is not
+               // pressed
+               BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
+                       if(s != mouse_over_signal)
+                               s->select(false);
+       }
 
        update();
 }
 
+void Header::mouseReleaseEvent(QMouseEvent *event)
+{
+       assert(event);
+       if(event->button() == Qt::LeftButton) {
+               _drag_sigs.clear();
+               _view.normalize_layout();
+       }
+}
+
 void Header::mouseMoveEvent(QMouseEvent *event)
 {
        assert(event);
        _mouse_point = event->pos();
+
+       // Move the signals if we are dragging
+       if(!_drag_sigs.empty()) {
+               const int delta = event->pos().y() - _mouse_down_point.y();
+
+               for(std::list<std::pair<boost::weak_ptr<Signal>,
+                       int> >::iterator i = _drag_sigs.begin();
+                       i != _drag_sigs.end(); i++) {
+                       const boost::shared_ptr<Signal> sig((*i).first);
+                       if(sig) {
+                               const int y = (*i).second + delta;
+                               const int y_snap =
+                                       ((y + View::SignalSnapGridSize / 2) /
+                                               View::SignalSnapGridSize) *
+                                               View::SignalSnapGridSize;
+                               sig->set_v_offset(y_snap);
+
+                               // Ensure the signal is selected
+                               sig->select();
+                       }
+                       
+               }
+
+               signals_moved();
+       }
+
        update();
 }
 
@@ -182,5 +248,11 @@ void Header::on_action_set_colour_triggered()
                context_signal->set_colour(new_colour);
 }
 
+void Header::on_signals_moved()
+{
+       update();
+}
+
+
 } // namespace view
 } // namespace pv