apps/radar/Lucid - working on rubber banding for zoom

codebase/apps/radar/src/Lucid/HorizWidget.cc

@@ -564,7 +564,8 @@ void HorizWidget::mouseReleaseEvent(QMouseEvent *e)
   }
 
   // hide the rubber band
-
+
+  _paintZoomRect();
   _rubberBand->hide();
   update();
 
@@ -2140,6 +2141,7 @@ void HorizWidget::mousePressEvent(QMouseEvent *e)
 
 
     _rubberBand->setGeometry(pos.x(), pos.y(), 0, 0);
+    _paintZoomRect();
     _rubberBand->show();
 
     _mousePressX = pos.x();
@@ -2200,6 +2202,7 @@ void HorizWidget::mouseMoveEvent(QMouseEvent * e)
   newRect = newRect.normalized();
 
   _rubberBand->setGeometry(newRect);
+  _paintZoomRect();
 
 }
 
@@ -2537,3 +2540,19 @@ void HorizWidget::ShowContextMenu(const QPoint &pos/* , RadxVol *vol */)
   contextMenu.exec(this->mapToGlobal(pos));
 }
 
+//////////////////////////////////////////
+// paint the user-selected zoom rectangle
+
+void HorizWidget::_paintZoomRect()
+{
+  QRect zrect = _rubberBand->geometry();
+  cerr << "Zoom rect x, y: "
+       << zrect.x() << ", " << zrect.y() << endl;
+  cerr << "Zoom rect width, height: "
+       << zrect.width() << ", " << zrect.height() << endl;
+  QPainter painter(this);
+  // painter.setCompositionMode(QPainter::RasterOp_SourceXorDestination);
+  painter.setPen(QColor(0xff, 0xff, 0xff));
+  painter.drawRect(zrect);
+}
+

codebase/apps/radar/src/Lucid/HorizWidget.hh

@@ -71,15 +71,18 @@ public:
 
 protected:
   void paintEvent(QPaintEvent *event) override {
+    QRubberBand::paintEvent(event);
+#ifdef NOTNOW
     QPainter painter(this);
     painter.setCompositionMode(QPainter::RasterOp_SourceXorDestination);
     // painter.setRenderHint(QPainter::Antialiasing);
     // Draw border
-    painter.setPen(QColor(0xff, 0xff, 0xff));
+    // painter.setPen(QColor(0xff, 0xff, 0xff));
     // Transparent background
-    // painter.setBrush(Qt::NoBrush);
+    painter.setBrush(Qt::NoBrush);
     // Adjust to stay within bounds    
     painter.drawRect(rect().adjusted(0, 0, -1, -1));
+#endif
   }
 };
 
@@ -454,13 +457,6 @@ class DLL_EXPORT HorizWidget : public QWidget
    */
 
   CustomRubberBand *_rubberBand;
-  QRect _zoomRect;
-
-  /**
-   * @brief The rubber band origin.
-   */
-
-  QPoint _rubberBandOrigin;
 
   /**
    * @brief The current ring spacing in km.  This value is changed when we
@@ -628,6 +624,11 @@ class DLL_EXPORT HorizWidget : public QWidget
   void _doRenderInvalidImages(QPainter &painter,
                               int index, VertWidget *vert);
 
+  // paint the user-selected zoom rectangle
+
+  void _setZoomRectPainter();
+  void _paintZoomRect();
+
 };