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

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

diff --git a/pv/view/view.cpp b/pv/view/view.cpp
index 98b5c65dd1fc37f8b3084e5363bb936b4fc1611a..c5465ff3c6ba19eef1cd68ba2082ba40d7f413c4 100644 (file)
--- a/pv/view/view.cpp
+++ b/pv/view/view.cpp
@@ -168,6 +168,22 @@ const QPoint& View::hover_point() const
        return _hover_point;
 }
 
        return _hover_point;
 }
 

+void View::normalize_layout()
+{
+       vector< shared_ptr<Signal> > &sigs = _session.get_signals();
+
+       int v_min = INT_MAX;
+       BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
+               v_min = min(s->get_v_offset(), v_min);
+
+       const int delta = -min(v_min, 0);
+       BOOST_FOREACH(shared_ptr<Signal> s, sigs)
+               s->set_v_offset(s->get_v_offset() + delta);
+
+       verticalScrollBar()->setSliderPosition(_v_offset + delta);
+       v_scroll_value_changed(verticalScrollBar()->sliderPosition());
+}
+

 void View::get_scroll_layout(double &length, double &offset) const
 {
        const shared_ptr<SignalData> sig_data = _session.get_data();
 void View::get_scroll_layout(double &length, double &offset) const
 {
        const shared_ptr<SignalData> sig_data = _session.get_data();


@@ -203,7 +219,8 @@ void View::update_scroll()
        // Set the vertical scrollbar
        verticalScrollBar()->setPageStep(areaSize.height());
        verticalScrollBar()->setRange(0,
        // Set the vertical scrollbar
        verticalScrollBar()->setPageStep(areaSize.height());
        verticalScrollBar()->setRange(0,

-               _viewport->get_total_height() - areaSize.height());
+               _viewport->get_total_height() + SignalMargin -
+               areaSize.height());

 }
 
 void View::reset_signal_layout()
 }
 
 void View::reset_signal_layout()


@@ -214,6 +231,8 @@ void View::reset_signal_layout()
                s->set_v_offset(offset);
                offset += SignalHeight + 2 * SignalMargin;
        }
                s->set_v_offset(offset);
                offset += SignalHeight + 2 * SignalMargin;
        }

+
+       normalize_layout();

 }
 
 bool View::eventFilter(QObject *object, QEvent *event)
 }
 
 bool View::eventFilter(QObject *object, QEvent *event)