HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Files · src/piechart/pieslicelabel.cpp

More documentation for pie

Jani Honkonen - - Load All Authors

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             pieslicelabel.cpp
        
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        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
      #include "pieslicelabel.h"

      #include <QPainter>

      #include <qmath.h>

        Jani Honkonen
    
Implementing slice label

              r181
            
      #include <QGraphicsTextItem>

        Jani Honkonen
    
Fix issue with pie label not drawn correctly when first created

              r209
            
      #include <QDebug>

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
      QTCOMMERCIALCHART_BEGIN_NAMESPACE

      #define PI 3.14159265

      PieSliceLabel::PieSliceLabel(QGraphicsItem* parent)

        Jani Honkonen
    
Fix issue with pie label not drawn correctly when first created

              r209
            
          :QGraphicsItem(parent),

          m_armAngle(0),

          m_armLength(0)

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
      {

        Jani Honkonen
    
Fix issue with pie label not drawn correctly when first created

              r209
            
        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
      }

      void PieSliceLabel::paint(QPainter *painter, const QStyleOptionGraphicsItem* /*option*/, QWidget* /*widget*/)

      {

          painter->setPen(m_pen);

        Jani Honkonen
    
Implementing slice label

              r181
            
          painter->drawPath(m_armPath);

          // TODO: do we need a pen for text?

        Jani Honkonen
    
Oops this was not supposed to be here...

              r211
            
          painter->setFont(m_font);

        Jani Honkonen
    
Adjusting slice label

              r210
            
          painter->drawText(m_textRect.bottomLeft(), m_text);

        Jani Honkonen
    
Fix issue with pie label not drawn correctly when first created

              r209
            
          //qDebug() << "PieSliceLabel::paint" << m_text << m_textRect;

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
      }

        Jani Honkonen
    
Implementing slice label

              r181
            
      void PieSliceLabel::updateGeometry()

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
      {

          prepareGeometryChange();

        Jani Honkonen
    
Implementing slice label

              r181
            
          // calculate text size

          QFontMetricsF fm(m_font);

          QRectF textRect = fm.boundingRect(m_text);

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
        Jani Honkonen
    
Implementing slice label

              r181
            
          // calculate path for arm and text start point

          qreal dx = qSin(m_armAngle*(PI/180)) * m_armLength;

          qreal dy = -qCos(m_armAngle*(PI/180)) * m_armLength;

          QPointF parm1 = m_armStartPoint + QPointF(dx, dy);

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
        Jani Honkonen
    
Implementing slice label

              r181
            
          // calculate horizontal arm and text position

          QPointF parm2 = parm1;

          textRect.moveBottomLeft(parm1);

          if (m_armAngle < 180) { // arm swings the other way on the left side

               parm2 += QPointF(m_textRect.width(), 0);

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
          } else {

        Jani Honkonen
    
Implementing slice label

              r181
            
               parm2 += QPointF(-m_textRect.width(),0);

               textRect.moveBottomLeft(parm2);

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
          }

        Jani Honkonen
    
Adjusting slice label

              r210
            
          // add a little offset to text so that it does not touch the arm

          qreal yOffset = m_pen.widthF() ? m_pen.widthF() : 2;

          textRect.translate(0, -yOffset);

        Jani Honkonen
    
Implementing slice label

              r181
            
          // update arm path

          QPainterPath path;

          path.moveTo(m_armStartPoint);

          path.lineTo(parm1);

          path.lineTo(parm2);

          // update paths & rects

          m_armPath = path;

          m_textRect = textRect;

          m_rect = path.boundingRect().united(m_textRect);

        Jani Honkonen
    
Fix issue with pie label not drawn correctly when first created

              r209
            
          //qDebug() << "PieSliceLabel::updateGeometry" << m_text << m_armStartPoint << m_armLength << m_armAngle << m_textRect;

        Jani Honkonen
    
Refactoring piechart API (and internals)

              r174
            
      }

      QTCOMMERCIALCHART_END_NAMESPACE

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Jani Honkonen Refactoring piechart API (and internals)	r174	#include "pieslicelabel.h"
		#include <QPainter>
		#include <qmath.h>
Jani Honkonen Implementing slice label	r181	#include <QGraphicsTextItem>
Jani Honkonen Fix issue with pie label not drawn correctly when first created	r209	#include <QDebug>
Jani Honkonen Refactoring piechart API (and internals)	r174
		QTCOMMERCIALCHART_BEGIN_NAMESPACE

		#define PI 3.14159265

		PieSliceLabel::PieSliceLabel(QGraphicsItem* parent)
Jani Honkonen Fix issue with pie label not drawn correctly when first created	r209	:QGraphicsItem(parent),
		m_armAngle(0),
		m_armLength(0)
Jani Honkonen Refactoring piechart API (and internals)	r174	{
Jani Honkonen Fix issue with pie label not drawn correctly when first created	r209
Jani Honkonen Refactoring piechart API (and internals)	r174	}

		void PieSliceLabel::paint(QPainter painter, const QStyleOptionGraphicsItem /option/, QWidget* /widget/)
		{
		painter->setPen(m_pen);
Jani Honkonen Implementing slice label	r181	painter->drawPath(m_armPath);

		// TODO: do we need a pen for text?
Jani Honkonen Oops this was not supposed to be here...	r211	painter->setFont(m_font);
Jani Honkonen Adjusting slice label	r210	painter->drawText(m_textRect.bottomLeft(), m_text);
Jani Honkonen Fix issue with pie label not drawn correctly when first created	r209
		//qDebug() << "PieSliceLabel::paint" << m_text << m_textRect;
Jani Honkonen Refactoring piechart API (and internals)	r174	}

Jani Honkonen Implementing slice label	r181	void PieSliceLabel::updateGeometry()
Jani Honkonen Refactoring piechart API (and internals)	r174	{
		prepareGeometryChange();

Jani Honkonen Implementing slice label	r181	// calculate text size
		QFontMetricsF fm(m_font);
		QRectF textRect = fm.boundingRect(m_text);
Jani Honkonen Refactoring piechart API (and internals)	r174
Jani Honkonen Implementing slice label	r181	// calculate path for arm and text start point
		qreal dx = qSin(m_armAngle(PI/180)) m_armLength;
		qreal dy = -qCos(m_armAngle(PI/180)) m_armLength;
		QPointF parm1 = m_armStartPoint + QPointF(dx, dy);
Jani Honkonen Refactoring piechart API (and internals)	r174
Jani Honkonen Implementing slice label	r181	// calculate horizontal arm and text position
		QPointF parm2 = parm1;
		textRect.moveBottomLeft(parm1);
		if (m_armAngle < 180) { // arm swings the other way on the left side
		parm2 += QPointF(m_textRect.width(), 0);
Jani Honkonen Refactoring piechart API (and internals)	r174	} else {
Jani Honkonen Implementing slice label	r181	parm2 += QPointF(-m_textRect.width(),0);
		textRect.moveBottomLeft(parm2);
Jani Honkonen Refactoring piechart API (and internals)	r174	}

Jani Honkonen Adjusting slice label	r210	// add a little offset to text so that it does not touch the arm
		qreal yOffset = m_pen.widthF() ? m_pen.widthF() : 2;
		textRect.translate(0, -yOffset);

Jani Honkonen Implementing slice label	r181	// update arm path
		QPainterPath path;
		path.moveTo(m_armStartPoint);
		path.lineTo(parm1);
		path.lineTo(parm2);

		// update paths & rects
		m_armPath = path;
		m_textRect = textRect;
		m_rect = path.boundingRect().united(m_textRect);
Jani Honkonen Fix issue with pie label not drawn correctly when first created	r209
		//qDebug() << "PieSliceLabel::updateGeometry" << m_text << m_armStartPoint << m_armLength << m_armAngle << m_textRect;
Jani Honkonen Refactoring piechart API (and internals)	r174	}

		QTCOMMERCIALCHART_END_NAMESPACE