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 85 insertions and 5 deletions:

scalepicker.cpp

scalepicker.h

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scalepicker.cpp

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@@ @@ -26,12 +26,13 @@ @@
 #include "scalepicker.h"
 // minimum size for pick (in pixels)
 #define MIN_PICK_SIZE (2)
 // TODO: rename to PlotOverlay
 class ScalePickerOverlay : public QwtWidgetOverlay
+{
 public:
     ScalePickerOverlay(QWidget* widget, ScalePicker* picker);
 protected:
@@ @@ -49,18 +50,44 @@ ScalePickerOverlay::ScalePickerOverlay(Q @@
 void ScalePickerOverlay::drawOverlay(QPainter* painter) const
+{
     _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;
+}
 bool ScalePicker::eventFilter(QObject* object, QEvent* event)
+{
@@ @@ -92,12 +119,13 @@ bool ScalePicker::eventFilter(QObject* o @@
+            }
             else if (started)
+            {
                 pickerOverlay->updateOverlay();
                 emit picking(firstPos, pos);
+            }
             scaleOverlay->updateOverlay();
+        }
         else // event->type() == QEvent::MouseButtonRelease
+        {
             if (started)
+            {
                 // finalize
@@ @@ -115,28 +143,54 @@ bool ScalePicker::eventFilter(QObject* o @@
+}
 void ScalePicker::drawOverlay(QPainter* painter)
+{
     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);
     if (1)
+    {
         painter->setPen(_pen);
         painter->drawRect(rect);
         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)
+{
     _pen = pen;
+}
@@ @@ -161,6 +215,27 @@ double ScalePicker::positionPx(QMouseEve @@
     else // left or right scale
+    {
         pos = mouseEvent->pos().y();
+    }
     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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@@ @@ -20,41 +20,46 @@ @@
 #ifndef SCALEPICKER_H
 #define SCALEPICKER_H
 #include <QObject>
 #include <QMouseEvent>
 #include <QPen>
 #include <QWidget>
 #include <qwt_scale_widget.h>
 #include <qwt_widget_overlay.h>
 class ScalePicker : public QObject
+{
     Q_OBJECT
 public:
     ScalePicker(QwtScaleWidget* scaleWidget, QWidget* canvas);
     virtual bool eventFilter(QObject*, QEvent*);
     void drawOverlay(QPainter*); // called from ScalePickerOverlay
     void drawScaleOverlay(QPainter*); // called from ScaleOverlay
     void setPen(QPen pen);
 signals:
     void pickStarted(double pos);
     void picking(double firstPos, double lastPos);
     void picked(double firstPos, double lastPos);
 private:
     QwtScaleWidget* _scaleWidget;
     QWidget* _canvas;
     QwtWidgetOverlay* pickerOverlay; // ScalePickerOverlay
     QwtWidgetOverlay* scaleOverlay;
     QPen _pen;
     bool pressed;
     bool started;
     double firstPos; // converted to plot coordinates
     double firstPosPx; // pixel coordinates
     double currentPosPx; // current position in pixel coordinates
     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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