tempo-plotter Changeset - a61946d36dde · protofusion repositories

Changeset - a61946d36dde

Parent rev.

Child rev.

[Not reviewed]

default

0 1 0

Hasan Yavuz ÖZDERYA - 9 years ago 2017-02-25 07:39:04
hy@ozderya.net

show tracker text when picking on scales

1 file changed with 36 insertions and 5 deletions:

src/scalepicker.cpp

0 comments (0 inline, 0 general)

src/scalepicker.cpp

➞

Show inline comments

@@ @@ -2,48 +2,49 @@ @@
   Copyright © 2017 Hasan Yavuz Özderya
   This file is part of serialplot.
   serialplot is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
   serialplot is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   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 <qwt_scale_div.h>
 #include <qwt_text.h>
 #include <math.h>
 #include "scalepicker.h"
 // minimum size for pick (in pixels)
 #define MIN_PICK_SIZE (2)
 #define SNAP_DISTANCE (5)
 class PlotOverlay : public QwtWidgetOverlay
+{
 public:
     PlotOverlay(QWidget* widget, ScalePicker* picker);
 protected:
     virtual void drawOverlay(QPainter*) const;
 private:
     ScalePicker* _picker;
 };
 PlotOverlay::PlotOverlay(QWidget* widget, ScalePicker* picker) :
     QwtWidgetOverlay(widget)
+{
@@ @@ -86,132 +87,162 @@ ScalePicker::ScalePicker(QwtScaleWidget* @@
     scaleWidget->installEventFilter(this);
     scaleWidget->setMouseTracking(true);
     pickerOverlay = new PlotOverlay(canvas, this);
     scaleOverlay = new ScaleOverlay(scaleWidget, this);
     started = false;
     pressed = false;
+}
 bool ScalePicker::eventFilter(QObject* object, QEvent* event)
+{
     if (event->type() == QEvent::MouseButtonPress ||
         event->type() == QEvent::MouseButtonRelease ||
         event->type() == QEvent::MouseMove)
+    {
         updateSnapPoints();
         QMouseEvent* mouseEvent = (QMouseEvent*) event;
         int posPx = this->positionPx(mouseEvent);
         // do snapping unless Shift is pressed
         if (! (mouseEvent->modifiers() & Qt::ShiftModifier))
+        {
             for (auto sp : snapPoints)
+            {
-                if (fabs(posPx-sp) <= SNAP_DISTANCE)
+                if (std::abs(posPx-sp) <= SNAP_DISTANCE)
+                {
                     posPx = sp;
                     break;
+                }
+            }
+        }
         double pos = this->position(posPx);
         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);
+            }
             pickerOverlay->updateOverlay();
             scaleOverlay->updateOverlay();
+        }
         else // event->type() == QEvent::MouseButtonRelease
+        {
             pressed = false;
             if (started)
+            {
                 // finalize
                 started = false;
                 emit picked(firstPos, pos);
+            }
+        }
         return true;
+    }
     else if (event->type() == QEvent::Leave)
+    {
         scaleOverlay->updateOverlay();
         pickerOverlay->updateOverlay();
         return true;
+    }
     else
+    {
         return QObject::eventFilter(object, event);
+    }
+}
 void ScalePicker::drawPlotOverlay(QPainter* painter)
+{
     const double FILL_ALPHA = 0.2;
     const int TEXT_MARGIN = 4;
     painter->save();
     painter->setPen(_pen);
     if (started)
+    {
         painter->save();
         painter->setPen(_pen);
         QColor color = _pen.color();
         color.setAlphaF(FILL_ALPHA);
         painter->setBrush(color);
         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();
+    }
     else if (_scaleWidget->underMouse())
+    {
         QwtText text(QString("%1").arg(position(currentPosPx)));
         int canvasPosPx = posCanvasPx(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));
+    }
     painter->restore();
+}
 void ScalePicker::drawScaleOverlay(QPainter* painter)
+{
     painter->save();
     // rotate & adjust coordinate system for vertical drawing
     if (_scaleWidget->alignment() == QwtScaleDraw::LeftScale ||
         _scaleWidget->alignment() == QwtScaleDraw::RightScale) // vertical
+    {
         int width = painter->device()->width();
         painter->rotate(90);
         painter->translate(0, -width);
+    }
     // draw the indicators
     if (started) drawTriangle(painter, firstPosPx);
     if (started || _scaleWidget->underMouse())
+    {
         drawTriangle(painter, currentPosPx);
+    }
     painter->restore();
+}

0 comments (0 inline, 0 general)