Header/Viewport: Manually trigger the signals_changed event at construction

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

diff --git a/pv/view/viewport.cpp b/pv/view/viewport.cpp
index a06c8888761f6c1237ffde3c5aecc8ceb2ff5df1..3b06cf9e85e0bc31a5c8f4e7edba38be8aaaa119 100644 (file)
--- a/pv/view/viewport.cpp
+++ b/pv/view/viewport.cpp
@@ -28,8 +28,10 @@
 
 #include <boost/foreach.hpp>
 
-using namespace boost;
-using namespace std;
+using boost::shared_ptr;
+using std::max;
+using std::min;
+using std::vector;
 
 namespace pv {
 namespace view {
@@ -47,6 +49,10 @@ Viewport::Viewport(View &parent) :
 
        connect(&_view, SIGNAL(signals_moved()),
                this, SLOT(on_signals_moved()));
+
+       // Trigger the initial event manually. The default device has signals
+       // which were created before this object came into being
+       on_signals_changed();
 }
 
 int Viewport::get_total_height() const
@@ -111,6 +117,16 @@ void Viewport::mouseMoveEvent(QMouseEvent *event)
        }
 }
 
+void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
+{
+       assert(event);
+
+       if (event->buttons() & Qt::LeftButton)
+               _view.zoom(2.0, event->x());
+       else if (event->buttons() & Qt::RightButton)
+               _view.zoom(-2.0, event->x());
+}
+
 void Viewport::wheelEvent(QWheelEvent *event)
 {
        assert(event);