Fix #771 by using black with alpha instead of an opaque grey

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

diff --git a/pv/view/trace.cpp b/pv/view/trace.cpp
index a96b0327e0e6ffd6f5364876b928ebaa87077daf..ea443f23b91cebf4ddb141b64ae3ef4af705b357 100644 (file)
--- a/pv/view/trace.cpp
+++ b/pv/view/trace.cpp
@@ -21,7 +21,7 @@
 #include <extdef.h>
 
 #include <assert.h>
-#include <math.h>
+#include <cmath>
 
 #include <QApplication>
 #include <QFormLayout>
@@ -38,13 +38,18 @@
 namespace pv {
 namespace view {
 
-const QPen Trace::AxisPen(QColor(128, 128, 128, 64));
+const QPen Trace::AxisPen(QColor(0, 0, 0, 30*256/100));
 const int Trace::LabelHitPadding = 2;
 
+const int Trace::ColourBGAlpha = 8*256/100;
+const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10*255/100);
+const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15*255/100);
+
 Trace::Trace(QString name) :
        name_(name),
-       popup_(NULL),
-       popup_form_(NULL)
+       coloured_bg_(true), // Default setting is set in MainWindow::setup_ui()
+       popup_(nullptr),
+       popup_form_(nullptr)
 {
 }
 
@@ -66,6 +71,14 @@ QColor Trace::colour() const
 void Trace::set_colour(QColor colour)
 {
        colour_ = colour;
+
+       bgcolour_ = colour;
+       bgcolour_.setAlpha(ColourBGAlpha);
+}
+
+void Trace::set_coloured_bg(bool state)
+{
+       coloured_bg_ = state;
 }
 
 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
@@ -163,17 +176,33 @@ QRectF Trace::label_rect(const QRectF &rect) const
                label_size.height());
 }
 
-QRectF Trace::hit_box_rect(const QRectF &rect) const
+void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 {
-       const float h = QFontMetrics(QApplication::font()).height();
-       return QRectF(rect.left(), get_visual_y() - h / 2.0f,
-               rect.width(), h);
+       if (coloured_bg_)
+               p.setBrush(bgcolour_);
+       else
+               p.setBrush(bgcolour_state_ ? BrightGrayBGColour : DarkGrayBGColour);
+
+       p.setPen(QPen(Qt::NoPen));
+
+       const std::pair<int, int> extents = v_extents();
+
+       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)
 {
+       p.setRenderHint(QPainter::Antialiasing, false);
+
        p.setPen(AxisPen);
-       p.drawLine(QPointF(pp.left(), y + 0.5f), QPointF(pp.right(), y + 0.5f));
+       p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
+
+       p.setRenderHint(QPainter::Antialiasing, true);
 }
 
 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
@@ -219,8 +248,8 @@ void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 
 void Trace::on_popup_closed()
 {
-       popup_ = NULL;
-       popup_form_ = NULL;
+       popup_ = nullptr;
+       popup_form_ = nullptr;
 }
 
 void Trace::on_text_changed(const QString &text)
@@ -236,7 +265,7 @@ void Trace::on_colour_changed(const QColor &colour)
        set_colour(colour);
 
        if (owner_)
-               owner_->row_item_appearance_changed(true, false);
+               owner_->row_item_appearance_changed(true, true);
 }
 
 } // namespace view