Improved propagation of drag event so that the scroll bars can be updated

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

diff --git a/pv/view/viewport.cpp b/pv/view/viewport.cpp
index 7d844d27bccadd71a287f5aeb784f9d5f1ad5f85..96111875570ee7e53bf0e9773285686acb01e8a8 100644 (file)
--- a/pv/view/viewport.cpp
+++ b/pv/view/viewport.cpp
@@ -41,18 +41,21 @@ Viewport::Viewport(View &parent) :
        setMouseTracking(true);
        setAutoFillBackground(true);
        setBackgroundRole(QPalette::Base);
+
+       connect(&_view, SIGNAL(signals_moved()),
+               this, SLOT(on_signals_moved()));
 }
 
 int Viewport::get_total_height() const
 {
-       int height = 0;
+       int h = 0;
        BOOST_FOREACH(const shared_ptr<Signal> s,
                _view.session().get_signals()) {
                assert(s);
-               height += View::SignalHeight;
+               h = max(s->get_v_offset() + View::SignalHeight, h);
        }
 
-       return height;
+       return h;
 }
 
 void Viewport::paintEvent(QPaintEvent *event)
@@ -142,5 +145,10 @@ void Viewport::draw_cursors_foreground(QPainter &p)
        cursors.second.paint(p, r);
 }
 
+void Viewport::on_signals_moved()
+{
+       update();
+}
+
 } // namespace view
 } // namespace pv