tempo-plotter Changeset - 2b6c00b1d12e · protofusion repositories

Changeset - 2b6c00b1d12e

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Hasan Yavuz ÖZDERYA - 9 years ago 2017-02-25 10:23:12
hy@ozderya.net

keep tracker text contained in canvas

2 files changed with 42 insertions and 26 deletions:

src/scalepicker.cpp

src/scalepicker.h

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src/scalepicker.cpp

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@@ @@ -160,125 +160,139 @@ bool ScalePicker::eventFilter(QObject* o @@
         pickerOverlay->updateOverlay();
         return true;
+    }
     else
+    {
         return QObject::eventFilter(object, event);
+    }
+}
 const int TEXT_MARGIN = 4;
 void ScalePicker::drawPlotOverlay(QPainter* painter)
+{
     const double FILL_ALPHA = 0.2;
     painter->save();
     painter->setPen(_pen);
     if (started)
+    {
         QColor color = _pen.color();
         color.setAlphaF(FILL_ALPHA);
         painter->setBrush(color);
         QRect rect;
         QwtText text(QString("%1").arg(position(currentPosPx)));
         auto tSize = text.textSize(painter->font());
         QPointF tTopLeft;
         if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
             _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+        {
             int canvasHeight = painter->device()->height();
             int pickWidth = currentPosPx-firstPosPx;
             rect = QRect(posCanvasPx(firstPosPx), 0, pickWidth, canvasHeight);
+        }
         else // vertical
+        {
             int canvasWidth = painter->device()->width();
             int pickHeight = currentPosPx-firstPosPx;
             rect = QRect(0, posCanvasPx(firstPosPx), canvasWidth, pickHeight);
+        }
         painter->drawRect(rect);
         text.draw(painter, pickTrackerTextRect(painter, rect, tSize));
+    }
     else if (_scaleWidget->underMouse())
+    {
         // draw tracker text centered on cursor
         int canvasPosPx = posCanvasPx(currentPosPx);
         QwtText text(QString("%1").arg(position(currentPosPx)));
         auto tsize = text.textSize(painter->font());
         QPointF topLeft;
         if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale)
+        {
             int height = painter->device()->height();
             topLeft = QPointF(canvasPosPx-tsize.width()/2, height-tsize.height());
+        }
         else if (_scaleWidget->alignment() == QwtScaleDraw::TopScale)
+        {
             topLeft = QPointF(canvasPosPx-tsize.width()/2, 0);
+        }
         else if (_scaleWidget->alignment() == QwtScaleDraw::LeftScale)
+        {
             topLeft = QPointF(TEXT_MARGIN, canvasPosPx-tsize.height()/2);
+        }
         else                    // right scale
+        {
             int width = painter->device()->width();
             topLeft = QPointF(width-tsize.width()-TEXT_MARGIN, canvasPosPx-tsize.height()/2);
+        }
         text.draw(painter, QRectF(topLeft, tsize));
         text.draw(painter, trackerTextRect(painter, currentPosPx, tsize));
+    }
     painter->restore();
+}
 QRectF ScalePicker::pickTrackerTextRect(QPainter* painter, QRect pickRect, QSizeF textSize)
 QRectF ScalePicker::trackerTextRect(QPainter* painter, int posPx, QSizeF textSize) const
+{
     int canvasPosPx = posCanvasPx(posPx);
     QPointF topLeft;
     if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
         _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+    {
         int left = canvasPosPx - textSize.width() / 2;
         int canvasWidth = painter->device()->width();
         left = std::max(TEXT_MARGIN, left);
         left = std::min(double(left), canvasWidth - textSize.width() - TEXT_MARGIN);
         int top = 0;
         if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale)
+        {
             top = painter->device()->height() - textSize.height();
+        }
         topLeft = QPointF(left, top);
+    }
     else                        // left/right scales
+    {
         int top = canvasPosPx-textSize.height() / 2;
         int canvasHeight = painter->device()->height();
         top = std::max(0, top);
         top = std::min(double(top), canvasHeight - textSize.height());
         int left = TEXT_MARGIN;
         if (_scaleWidget->alignment() == QwtScaleDraw::RightScale)
+        {
             left = painter->device()->width() - textSize.width();
+        }
         topLeft = QPointF(left, top);
+    }
     return QRectF(topLeft, textSize);
+}
 QRectF ScalePicker::pickTrackerTextRect(QPainter* painter, QRect pickRect, QSizeF textSize) const
+{
     qreal left = 0;
     int pickLength = currentPosPx - firstPosPx;
     QPointF topLeft;
     if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale ||
         _scaleWidget->alignment() == QwtScaleDraw::TopScale)
+    {
         int canvasWidth = painter->device()->width();
         if (pickLength > 0)
+        {
             left = pickRect.right() + TEXT_MARGIN;
+        }
         else
+        {
             left = pickRect.right() - (textSize.width() + TEXT_MARGIN);
+        }
         // make sure text is not off the canvas
         if (left < TEXT_MARGIN)
+        {
             left = std::max(0, pickRect.right()) + TEXT_MARGIN;
+        }
         else if (left + textSize.width() + TEXT_MARGIN > canvasWidth)
+        {
             left = std::min(pickRect.right(), canvasWidth) - (textSize.width() + TEXT_MARGIN);
+        }
         if (_scaleWidget->alignment() == QwtScaleDraw::BottomScale)
+        {
             int canvasHeight = painter->device()->height();
             topLeft = QPointF(left, canvasHeight - textSize.height());
+        }
         else                // top scale
+        {
             topLeft = QPointF(left, 0);
+        }
+    }
     else                        // left/right scale
+    {
         int canvasHeight = painter->device()->height();
         int top = 0;
         if (pickLength > 0)
+        {
             top = pickRect.bottom();
+        }
@@ @@ -344,76 +358,76 @@ void ScalePicker::drawTriangle(QPainter* @@
             {0, 0},
             {-trsize/tan60 , trsize},
             {trsize/tan60 , trsize}
         };
     painter->save();
     painter->setPen(Qt::NoPen);
     painter->setBrush(_scaleWidget->palette().windowText());
     painter->setRenderHint(QPainter::Antialiasing);
     painter->translate(position, MARGIN);
     painter->drawPolygon(points, TRIANGLE_NUM_POINTS);
     painter->restore();
+}
 void ScalePicker::setPen(QPen pen)
+{
     _pen = pen;
+}
 // convert the position of the click to the plot coordinates
 double ScalePicker::position(double posPx)
+{
     return _scaleWidget->scaleDraw()->scaleMap().invTransform(posPx);
+}
 int 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)
+double ScalePicker::posCanvasPx(double pos) const
+{
     // 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;
+}
 void ScalePicker::updateSnapPoints()
+{
     auto allTicks = _scaleWidget->scaleDraw()->scaleDiv().ticks(QwtScaleDiv::MajorTick) +
         _scaleWidget->scaleDraw()->scaleDiv().ticks(QwtScaleDiv::MediumTick) +
         _scaleWidget->scaleDraw()->scaleDiv().ticks(QwtScaleDiv::MinorTick);
     snapPoints.clear();
     for(auto t : allTicks)
+    {
         // `round` is used because `allTicks` is double but `snapPoints` is int
         snapPoints << round(_scaleWidget->scaleDraw()->scaleMap().transform(t));
+    }
+}

src/scalepicker.h

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Show inline comments

@@ @@ -16,58 +16,60 @@ @@
   You should have received a copy of the GNU General Public License
   along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
 */
 #ifndef SCALEPICKER_H
 #define SCALEPICKER_H
 #include <QObject>
 #include <QMouseEvent>
 #include <QPen>
 #include <QWidget>
 #include <QList>
 #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 drawPlotOverlay(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; // will be PlotOverlay
     QwtWidgetOverlay* scaleOverlay;  // will be ScaleOverlay
     QPen _pen;
     bool pressed;
     bool started;
     double firstPos; // converted to plot coordinates
     double firstPosPx; // pixel coordinates
     double currentPosPx; // current position in pixel coordinates
     QList<int> snapPoints;
     double position(double); // returns the axis mouse position relative to plot coordinates
     int positionPx(QMouseEvent*); // returns the axis mouse position in pixels
     double posCanvasPx(double pos); // returns the given position in canvas coordinates
+    double posCanvasPx(double pos) const; // returns the given position in canvas coordinates
     void drawTriangle(QPainter* painter, int position);
 private slots:
     /// Returns tracker text position
     QRectF trackerTextRect(QPainter* painter, int posPx, QSizeF textSize) const;
     /// Returns the text position for tracker text shown during picking
     QRectF pickTrackerTextRect(QPainter* painter, QRect pickRect, QSizeF textSize);
+    QRectF pickTrackerTextRect(QPainter* painter, QRect pickRect, QSizeF textSize) const;
     void updateSnapPoints();
 };
 #endif // SCALEPICKER_H

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