Added initial support for dragging

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

diff --git a/pv/view/header.cpp b/pv/view/header.cpp
index 8434e2c8dc9ffb289c676f338d151793367e5a8e..00c4201cf39a28d0ee3e234b0f311e6838ab1a5b 100644 (file)
--- a/pv/view/header.cpp
+++ b/pv/view/header.cpp
@@ -124,13 +124,45 @@ void Header::mousePressEvent(QMouseEvent *event)
        if(mouse_over_signal)
                mouse_over_signal->select(!mouse_over_signal->selected());
 
+       if(event->button() & Qt::LeftButton) {
+               _mouse_down_point = event->pos();
+
+               // Save the current signal offsets
+               BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
+                       _mouse_down_signal_offsets[s.get()] =
+                               s->get_v_offset();
+       }
+
        update();
 }
 
+void Header::mouseReleaseEvent(QMouseEvent *event)
+{
+       assert(event);
+       if(event->button() == Qt::LeftButton)
+               _mouse_down_signal_offsets.clear();
+}
+
 void Header::mouseMoveEvent(QMouseEvent *event)
 {
        assert(event);
        _mouse_point = event->pos();
+
+       // Move the signals if we are dragging
+       if(!_mouse_down_signal_offsets.empty()) {
+               const vector< shared_ptr<Signal> > &sigs =
+                       _view.session().get_signals();
+               const int delta = event->pos().y() - _mouse_down_point.y();
+
+               BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
+                       if(s->selected())
+                               s->set_v_offset(
+                                       _mouse_down_signal_offsets[s.get()] +
+                                       delta);
+
+               signals_moved();
+       }
+
        update();
 }