tempo-plotter Changeset - 6c305182bff3 · protofusion repositories

Changeset - 6c305182bff3

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scalezoomer

0 2 0

Hasan Yavuz ÖZDERYA - 10 years ago 2015-08-26 10:47:31
hy@ozderya.net

make sure pick size is not zero

2 files changed with 37 insertions and 9 deletions:

scalepicker.cpp

scalepicker.h

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scalepicker.cpp

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@@ @@ -22,15 +22,20 @@ @@
 #include <qwt_scale_widget.h>
 #include <qwt_scale_map.h>
 #include <QtDebug>
 #include <math.h>
 #include "scalepicker.h"
 // minimum size for pick (in pixels)
 #define MIN_PICK_SIZE (2)
 ScalePicker::ScalePicker(QwtScaleWidget* scaleWidget) :
     QObject(scaleWidget)
+{
     scaleWidget->installEventFilter(this);
     _scaleWidget = scaleWidget;
     started = false;
     pressed = false;
+}
 bool ScalePicker::eventFilter(QObject* object, QEvent* event)
@@ @@ -41,17 +46,26 @@ bool ScalePicker::eventFilter(QObject* o @@
+    {
         QMouseEvent* mouseEvent = (QMouseEvent*) event;
         double pos = this->position(mouseEvent);
         double posPx = this->positionPx(mouseEvent);
         if (event->type() == QEvent::MouseButtonPress)
         if (event->type() == QEvent::MouseButtonPress &&
             mouseEvent->button() == Qt::LeftButton)
+        {
             pressed = true; // not yet started
             firstPos = pos;
             firstPosPx = posPx;
+        }
         else if (event->type() == QEvent::MouseMove)
+        {
             // make sure pick size is big enough, so that just
             // clicking won't trigger pick
             if (!started && pressed && (fabs(posPx-firstPosPx) > MIN_PICK_SIZE))
+        {
             started = true;
             firstPos = pos;
             qDebug() << "Pick started:" << firstPos;
             emit pickStarted(pos);
+        }
         else if (event->type() == QEvent::MouseMove)
+        {
             if (started)
             else if (started)
+            {
                 emit picking(firstPos, pos);
+            }
@@ @@ -60,7 +74,9 @@ bool ScalePicker::eventFilter(QObject* o @@
+        {
             if (started)
+            {
                 // finalize
                 started = false;
                 pressed = false;
                 qDebug() << "Picked:" << firstPos << pos;
                 emit picked(firstPos, pos);
+            }
@@ @@ -75,7 +91,15 @@ bool ScalePicker::eventFilter(QObject* o @@
 double ScalePicker::position(QMouseEvent* mouseEvent)
+{
     // capture and convert the position of the click to the plot coordinates
     double pos;
     pos = positionPx(mouseEvent);
     // convert the position of the click to the plot coordinates
     pos = _scaleWidget->scaleDraw()->scaleMap().invTransform(pos);
     return pos;
+}
 double ScalePicker::positionPx(QMouseEvent* mouseEvent)
+{
     double pos;
     if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
         _scaleWidget->alignment() == QwtScaleDraw::TopScale)
@@ @@ -86,6 +110,5 @@ double ScalePicker::position(QMouseEvent @@
+    {
         pos = mouseEvent->pos().y();
+    }
     pos = _scaleWidget->scaleDraw()->scaleMap().invTransform(pos);
     return pos;
+}

scalepicker.h

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@@ @@ -22,11 +22,13 @@ @@
 #include <QObject>
 #include <QMouseEvent>
 #include <QPointF>
 #include <qwt_scale_widget.h>
 class ScalePicker : public QObject
+{
     Q_OBJECT
 public:
     ScalePicker(QwtScaleWidget* scaleWidget);
     virtual bool eventFilter(QObject*, QEvent*);
@@ @@ -38,10 +40,13 @@ signals: @@
 private:
     QwtScaleWidget* _scaleWidget;
     double position(QMouseEvent*); // returns the mouse position relative to plot coordinates
     double position(QMouseEvent*); // returns the axis mouse position relative to plot coordinates
     double positionPx(QMouseEvent*); // returns the axis mouse position in pixels
     bool pressed;
     bool started;
     double firstPos;
     double firstPos; // converted to plot coordinates
     double firstPosPx; // pixel coordinates
 };
 #endif // SCALEPICKER_H

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