Make traces only selectable in the header area

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

diff --git a/pv/view/trace.cpp b/pv/view/trace.cpp
index 3727afa2de246912c8834dc0f3977d5131ec25bc..ee0a4f0e921630b986a090bbdca494fb3849010f 100644 (file)
--- a/pv/view/trace.cpp
+++ b/pv/view/trace.cpp
@@ -41,6 +41,9 @@ namespace view {
 const QPen Trace::AxisPen(QColor(128, 128, 128, 64));
 const int Trace::LabelHitPadding = 2;
 
+const QColor Trace::DarkBGColour(235, 235, 235);    // Quite light grey
+const QColor Trace::BrightBGColour(245, 245, 245);  // Very light grey
+
 Trace::Trace(QString name) :
        name_(name),
        coloured_bg_(true), // Default setting is set in MainWindow::setup_ui()
@@ -77,6 +80,27 @@ void Trace::set_coloured_bg(bool state)
        coloured_bg_ = state;
 }
 
+bool Trace::is_draggable() const
+{
+       const View *const view = owner_->view();
+       assert(view);
+
+       QPoint cursor_pos = view->mapFromGlobal(QCursor::pos());
+
+       // The signal is draggable only in the header area
+       return (cursor_pos.x() <= view->header_size().width());
+}
+
+void Trace::select(bool select)
+{
+       // Trace can only be selected if the mouse cursor is in the header area;
+       // as is_draggable() checks the same thing, we re-use it here
+       if (is_draggable() && select)
+               selected_ = true;
+       else
+               selected_ = false;
+}
+
 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
 {
        const int y = get_visual_y();
@@ -181,19 +205,21 @@ QRectF Trace::hit_box_rect(const ViewItemPaintParams &pp) const
 
 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 {
-       if (coloured_bg_) {
-               p.setPen(QPen(Qt::NoPen));
+       if (coloured_bg_)
                p.setBrush(bgcolour_);
+       else
+               p.setBrush(bgcolour_state_ ? BrightBGColour : DarkBGColour);
 
-               const std::pair<int, int> extents = v_extents();
+       p.setPen(QPen(Qt::NoPen));
 
-               const int x = 0;
-               const int y = get_visual_y() + extents.first;
-               const int w = pp.right() - pp.left();
-               const int h = extents.second - extents.first;
+       const std::pair<int, int> extents = v_extents();
 
-               p.drawRect(x, y, w, h);
-       }
+       const int x = 0;
+       const int y = get_visual_y() + extents.first;
+       const int w = pp.right() - pp.left();
+       const int h = extents.second - extents.first;
+
+       p.drawRect(x, y, w, h);
 }
 
 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)