# HG changeset patch
# User Hasan Yavuz ÖZDERYA <hy@ozderya.net>
# Date 2017-04-13 14:34:19
# Node ID 754420135f2244163fefe5fb5cfff69e32fb69c5
# Parent  e3e70c85583663f108eba4facd88904fce38e1c3

fancy zoom rubberband background

diff --git a/src/zoomer.cpp b/src/zoomer.cpp
--- a/src/zoomer.cpp
+++ b/src/zoomer.cpp
@@ -73,3 +73,25 @@ QwtText Zoomer::trackerTextF(const QPoin
 
     return b;
 }
+
+void Zoomer::drawRubberBand(QPainter* painter) const
+{
+    const double FILL_ALPHA = 0.2;
+
+    QColor color = painter->pen().color();
+    color.setAlphaF(FILL_ALPHA);
+    painter->setBrush(color);
+
+    ScrollZoomer::drawRubberBand(painter);
+}
+
+QRegion Zoomer::rubberBandMask() const
+{
+    const QPolygon pa = selection();
+    if (pa.count() < 2)
+    {
+        return QRegion();
+    }
+    const QRect r = QRect(pa.first(), pa.last()).normalized().adjusted(0, 0, 1, 1);
+    return QRegion(r);
+}
diff --git a/src/zoomer.h b/src/zoomer.h
--- a/src/zoomer.h
+++ b/src/zoomer.h
@@ -37,6 +37,10 @@ signals:
 protected:
     /// Re-implemented to display selection size in the tracker text.
     QwtText trackerTextF(const QPointF &pos) const;
+    /// Re-implemented for alpha background
+    void drawRubberBand(QPainter* painter) const;
+    /// Re-implemented for alpha background (masking is basically disabled)
+    QRegion rubberBandMask() const;
 };
 
 #endif // ZOOMER_H