tempo-plotter Changeset - 07202c91eec0 · protofusion repositories

Changeset - 07202c91eec0

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scalezoomer

0 4 0

Hasan Yavuz ÖZDERYA - 10 years ago 2015-08-27 08:46:48
hy@ozderya.net

use QwtWidgetOverlay for drawing picker overlay

4 files changed with 58 insertions and 41 deletions:

scalepicker.cpp

scalepicker.h

scalezoomer.cpp

scalezoomer.h

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scalepicker.cpp

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@@ @@ -16,27 +16,51 @@ @@
   You should have received a copy of the GNU General Public License
   along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include <QEvent>
 #include <QMouseEvent>
 #include <QPainter>
 #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) :
 class ScalePickerOverlay : public QwtWidgetOverlay
+{
 public:
     ScalePickerOverlay(QWidget* widget, ScalePicker* picker);
 protected:
     virtual void drawOverlay(QPainter*) const;
 private:
     ScalePicker* _picker;
 };
 ScalePickerOverlay::ScalePickerOverlay(QWidget* widget, ScalePicker* picker) :
     QwtWidgetOverlay(widget)
+{
     _picker = picker;
+}
 void ScalePickerOverlay::drawOverlay(QPainter* painter) const
+{
     _picker->drawOverlay(painter);
+}
 ScalePicker::ScalePicker(QwtScaleWidget* scaleWidget, QWidget* canvas) :
     QObject(scaleWidget)
+{
     scaleWidget->installEventFilter(this);
     _scaleWidget = scaleWidget;
     pickerOverlay = new ScalePickerOverlay(canvas, this);
     started = false;
     pressed = false;
+}
 bool ScalePicker::eventFilter(QObject* object, QEvent* event)
+{
@@ @@ -44,12 +68,13 @@ bool ScalePicker::eventFilter(QObject* o @@
         event->type() == QEvent::MouseButtonRelease ||
         event->type() == QEvent::MouseMove)
+    {
         QMouseEvent* mouseEvent = (QMouseEvent*) event;
         double pos = this->position(mouseEvent);
         double posPx = this->positionPx(mouseEvent);
         currentPosPx = posPx;
         if (event->type() == QEvent::MouseButtonPress &&
             mouseEvent->button() == Qt::LeftButton)
+        {
             pressed = true; // not yet started
             firstPos = pos;
@@ @@ -59,39 +84,59 @@ bool ScalePicker::eventFilter(QObject* o @@
+        {
             // 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;
-                qDebug() << "Pick started:" << firstPos;
+                // pickerOverlay->updateOverlay();
                 emit pickStarted(pos);
+            }
             else if (started)
+            {
                 pickerOverlay->updateOverlay();
                 emit picking(firstPos, pos);
+            }
+        }
         else // event->type() == QEvent::MouseButtonRelease
+        {
             if (started)
+            {
                 // finalize
                 started = false;
                 pressed = false;
                 qDebug() << "Picked:" << firstPos << pos;
                 emit picked(firstPos, pos);
+            }
+        }
         return true;
+    }
     else
+    {
         return QObject::eventFilter(object, event);
+    }
+}
 void ScalePicker::drawOverlay(QPainter* painter)
+{
     if (started)
+    {
         QRect rect;
         if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
             _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+        {
             int height = painter->device()->height();
             rect = QRect(firstPosPx, 0, (currentPosPx-firstPosPx), height);
+        }
         else // vertical
+        {
             int width = painter->device()->width();
             rect = QRect(0, firstPosPx, width, (currentPosPx-firstPosPx));
+        }
         painter->drawRect(rect);
+    }
+}
 double ScalePicker::position(QMouseEvent* mouseEvent)
+{
     double pos;
     pos = positionPx(mouseEvent);
     // convert the position of the click to the plot coordinates
     pos = _scaleWidget->scaleDraw()->scaleMap().invTransform(pos);

scalepicker.h

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@@ @@ -19,34 +19,38 @@ @@
 #ifndef SCALEPICKER_H
 #define SCALEPICKER_H
 #include <QObject>
 #include <QMouseEvent>
 #include <QPointF>
 #include <qwt_scale_widget.h>
 #include <qwt_widget_overlay.h>
 class ScalePicker : public QObject
+{
     Q_OBJECT
 public:
     ScalePicker(QwtScaleWidget* scaleWidget);
+    ScalePicker(QwtScaleWidget* scaleWidget, QWidget* canvas);
     virtual bool eventFilter(QObject*, QEvent*);
     void drawOverlay(QPainter*); // called from ScalePickerOverlay
 signals:
     void pickStarted(double pos);
     void picking(double firstPos, double lastPos);
     void picked(double firstPos, double lastPos);
 private:
     QwtScaleWidget* _scaleWidget;
     QwtWidgetOverlay* pickerOverlay; // ScalePickerOverlay
     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; // converted to plot coordinates
     double firstPosPx; // pixel coordinates
     double currentPosPx; // current position in pixel coordinates
 };
 #endif // SCALEPICKER_H

scalezoomer.cpp

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@@ @@ -15,51 +15,26 @@ @@
   You should have received a copy of the GNU General Public License
   along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include <QRectF>
-#include <QtDebug>
 #include "scalezoomer.h"
 ScaleZoomer::ScaleZoomer(QwtPlot* plot, QwtPlotZoomer* zoomer) :
     QObject(plot),
     bottomPicker(plot->axisWidget(QwtPlot::xBottom)),
     leftPicker(plot->axisWidget(QwtPlot::yLeft))
     bottomPicker(plot->axisWidget(QwtPlot::xBottom), plot->canvas()),
     leftPicker(plot->axisWidget(QwtPlot::yLeft), plot->canvas())
+{
     _plot = plot;
     _zoomer = zoomer;
     connect(&bottomPicker, &ScalePicker::pickStarted, this, &ScaleZoomer::bottomPickStarted);
     connect(&bottomPicker, &ScalePicker::picking, this, &ScaleZoomer::bottomPicking);
     connect(&bottomPicker, &ScalePicker::picked, this, &ScaleZoomer::bottomPicked);
     connect(&leftPicker, &ScalePicker::picked, this, &ScaleZoomer::leftPicked);
+}
 void ScaleZoomer::bottomPickStarted(double firstPos)
+{
     double yMin = _plot->axisScaleDiv(QwtPlot::yLeft).lowerBound();
     double yMax = _plot->axisScaleDiv(QwtPlot::yLeft).upperBound();
     rectShape.setRect(QRectF(firstPos, yMin, 2, yMax-yMin));
     rectShape.attach(_plot);
     _plot->replot();
+}
 void ScaleZoomer::bottomPicking(double firstPos, double lastPos)
+{
     double yMin = _plot->axisScaleDiv(QwtPlot::yLeft).lowerBound();
     double yMax = _plot->axisScaleDiv(QwtPlot::yLeft).upperBound();
     if (lastPos > firstPos) {
         rectShape.setRect(QRectF(firstPos, yMin, lastPos-firstPos, yMax-yMin));
+    }
     else
+    {
         rectShape.setRect(QRectF(lastPos, yMin, firstPos-lastPos, yMax-yMin));
+    }
     _plot->replot();
+}
 void ScaleZoomer::bottomPicked(double firstPos, double lastPos)
+{
     QRectF zRect;
     if (lastPos > firstPos)
+    {
         zRect.setLeft(firstPos);
@@ @@ -71,14 +46,12 @@ void ScaleZoomer::bottomPicked(double fi @@
         zRect.setRight(firstPos);
+    }
     zRect.setBottom(_plot->axisScaleDiv(QwtPlot::yLeft).lowerBound());
     zRect.setTop(_plot->axisScaleDiv(QwtPlot::yLeft).upperBound());
     _zoomer->zoom(zRect);
     rectShape.detach();
     _plot->replot();
+}
 void ScaleZoomer::leftPicked(double firstPos, double lastPos)
+{
     QRectF zRect;
     if (lastPos > firstPos)

scalezoomer.h

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@@ @@ -20,13 +20,12 @@ @@
 #ifndef SCALEZOOMER_H
 #define SCALEZOOMER_H
 #include <QObject>
 #include <qwt_plot.h>
 #include <qwt_plot_zoomer.h>
 #include <qwt_plot_shapeitem.h>
 #include "scalepicker.h"
 class ScaleZoomer : public QObject
+{
     Q_OBJECT
@@ @@ -37,16 +36,12 @@ public: @@
 private:
     QwtPlot* _plot;
     QwtPlotZoomer* _zoomer;
     ScalePicker bottomPicker;
     ScalePicker leftPicker;
     QwtPlotShapeItem rectShape;
 private slots:
     void bottomPickStarted(double firstPos);
     void bottomPicked(double firstPos, double lastPos);
     void bottomPicking(double firstPos, double lastPos);
     void leftPicked(double firstPos, double lastPos);
 };
 #endif /* SCALEZOOMER_H */

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