tempo-plotter Changeset - 23c08728ad2d · protofusion repositories

Changeset - 23c08728ad2d

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scalezoomer

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Hasan Yavuz ÖZDERYA - 10 years ago 2015-09-13 09:20:57
hy@ozderya.net

draw tracker line only when mouse is over

1 file changed with 11 insertions and 0 deletions:

scalepicker.cpp

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scalepicker.cpp

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@@ @@ -89,147 +89,158 @@ ScalePicker::ScalePicker(QwtScaleWidget* @@
+}
 bool ScalePicker::eventFilter(QObject* object, QEvent* event)
+{
     if (event->type() == QEvent::MouseButtonPress ||
         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;
             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;
                 emit pickStarted(pos);
+            }
             else if (started)
+            {
                 pickerOverlay->updateOverlay();
                 emit picking(firstPos, pos);
+            }
             scaleOverlay->updateOverlay();
+        }
         else // event->type() == QEvent::MouseButtonRelease
+        {
             if (started)
+            {
                 // finalize
                 started = false;
                 pressed = false;
                 emit picked(firstPos, pos);
+            }
+        }
         return true;
+    }
     else if (event->type() == QEvent::Leave)
+    {
         scaleOverlay->updateOverlay();
         return true;
+    }
     else
+    {
         return QObject::eventFilter(object, event);
+    }
+}
 void ScalePicker::drawPlotOverlay(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(posCanvasPx(firstPosPx), 0, currentPosPx-firstPosPx, height);
+        }
         else // vertical
+        {
             int width = painter->device()->width();
             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)
+    {
         if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
             _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+        {
             int height = painter->device()->height();
             if (started) painter->drawLine(firstPosPx, 0, firstPosPx, height);
             if (started || _scaleWidget->underMouse())
+            {
             painter->drawLine(currentPosPx, 0, currentPosPx, height);
+        }
+        }
         else // vertical
+        {
             int width = painter->device()->width();
             if (started) painter->drawLine(0, firstPosPx, width, firstPosPx);
             if (started || _scaleWidget->underMouse())
+            {
             painter->drawLine(0, currentPosPx, width, currentPosPx);
+        }
+    }
+    }
     painter->restore();
+}
 void ScalePicker::setPen(QPen pen)
+{
     _pen = pen;
+}
 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);
     return pos;
+}
 double ScalePicker::positionPx(QMouseEvent* mouseEvent)
+{
     double pos;
     if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
         _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+    {
         pos = mouseEvent->pos().x();
+    }
     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
+    {

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