tempo-plotter Changeset - e250b5832da0 · protofusion repositories

Changeset - e250b5832da0

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scalezoomer

0 2 0

Hasan Yavuz ÖZDERYA - 10 years ago 2015-09-13 09:03:18
hy@ozderya.net

added picker lines over scale widget

2 files changed with 84 insertions and 4 deletions:

scalepicker.cpp

scalepicker.h

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scalepicker.cpp

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@@ @@ -29,6 +29,7 @@ @@
 // minimum size for pick (in pixels)
 #define MIN_PICK_SIZE (2)
 // TODO: rename to PlotOverlay
 class ScalePickerOverlay : public QwtWidgetOverlay
+{
 public:
@@ @@ -52,12 +53,38 @@ void ScalePickerOverlay::drawOverlay(QPa @@
     _picker->drawOverlay(painter);
+}
 class ScaleOverlay : public QwtWidgetOverlay
+{
 public:
     ScaleOverlay(QWidget* widget, ScalePicker* picker);
 protected:
     virtual void drawOverlay(QPainter*) const;
 private:
     ScalePicker* _picker;
 };
 ScaleOverlay::ScaleOverlay(QWidget* widget, ScalePicker* picker) :
     QwtWidgetOverlay(widget)
+{
     _picker = picker;
+}
 void ScaleOverlay::drawOverlay(QPainter* painter) const
+{
     _picker->drawScaleOverlay(painter);
+}
 ScalePicker::ScalePicker(QwtScaleWidget* scaleWidget, QWidget* canvas) :
     QObject(scaleWidget)
+{
     _scaleWidget = scaleWidget;
     _canvas = canvas;
     scaleWidget->installEventFilter(this);
-    _scaleWidget = scaleWidget;
+    scaleWidget->setMouseTracking(true);
     pickerOverlay = new ScalePickerOverlay(canvas, this);
     scaleOverlay = new ScaleOverlay(scaleWidget, this);
     started = false;
     pressed = false;
+}
@@ @@ -95,6 +122,7 @@ bool ScalePicker::eventFilter(QObject* o @@
                 pickerOverlay->updateOverlay();
                 emit picking(firstPos, pos);
+            }
             scaleOverlay->updateOverlay();
+        }
         else // event->type() == QEvent::MouseButtonRelease
+        {
@@ @@ -118,22 +146,48 @@ void ScalePicker::drawOverlay(QPainter* @@
+{
     if (started)
+    {
         painter->save();
         painter->setPen(_pen);
         QRect rect;
         if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
             _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+        {
             int height = painter->device()->height();
-            rect = QRect(firstPosPx, 0, (currentPosPx-firstPosPx), height);
+            rect = QRect(posCanvasPx(firstPosPx), 0, currentPosPx-firstPosPx, height);
+        }
         else // vertical
+        {
             int width = painter->device()->width();
             rect = QRect(0, firstPosPx, width, (currentPosPx-firstPosPx));
             rect = QRect(0, posCanvasPx(firstPosPx), width, currentPosPx-firstPosPx);
+        }
         painter->drawRect(rect);
         painter->restore();
+    }
+        }
 void ScalePicker::drawScaleOverlay(QPainter* painter)
+{
     painter->save();
         painter->setPen(_pen);
         painter->drawRect(rect);
     if (1)
+    {
         if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
             _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+        {
             int height = painter->device()->height();
             if (started) painter->drawLine(firstPosPx, 0, firstPosPx, height);
             painter->drawLine(currentPosPx, 0, currentPosPx, height);
+    }
         else // vertical
+        {
             int width = painter->device()->width();
             if (started) painter->drawLine(0, firstPosPx, width, firstPosPx);
             painter->drawLine(0, currentPosPx, width, currentPosPx);
+        }
+    }
     painter->restore();
+}
 void ScalePicker::setPen(QPen pen)
@@ @@ -164,3 +218,24 @@ double ScalePicker::positionPx(QMouseEve @@
+    }
     return pos;
+}
 /*
  * Scale widget and canvas widget is not always aligned. Especially
  * when zooming scaleWidget moves around. This causes irregularities
  * when drawing the tracker lines. This function maps scale widgets
  * pixel coordinate to canvas' coordinate.
  */
 double ScalePicker::posCanvasPx(double pos)
+{
     // assumption: scale.width < canvas.width && scale.x > canvas.x
     if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
         _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+    {
         return pos + (_scaleWidget->x() - _canvas->x());
+    }
     else // left or right scale
+    {
         return pos + (_scaleWidget->y() - _canvas->y());
+    }
     return pos;
+}

scalepicker.h

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@@ @@ -23,6 +23,7 @@ @@
 #include <QObject>
 #include <QMouseEvent>
 #include <QPen>
 #include <QWidget>
 #include <qwt_scale_widget.h>
 #include <qwt_widget_overlay.h>
@@ @@ -35,6 +36,7 @@ public: @@
     virtual bool eventFilter(QObject*, QEvent*);
     void drawOverlay(QPainter*); // called from ScalePickerOverlay
     void drawScaleOverlay(QPainter*); // called from ScaleOverlay
     void setPen(QPen pen);
 signals:
@@ @@ -44,7 +46,9 @@ signals: @@
 private:
     QwtScaleWidget* _scaleWidget;
     QWidget* _canvas;
     QwtWidgetOverlay* pickerOverlay; // ScalePickerOverlay
     QwtWidgetOverlay* scaleOverlay;
     QPen _pen;
     bool pressed;
@@ @@ -55,6 +59,7 @@ private: @@
     double position(QMouseEvent*); // returns the axis mouse position relative to plot coordinates
     double positionPx(QMouseEvent*); // returns the axis mouse position in pixels
     double posCanvasPx(double pos); // returns the given position in canvas coordinates
 };
 #endif // SCALEPICKER_H

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