progressiveLineGraph.h

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/****************************************************************************
 * Copyright (c) 2017 MAK Technologies, Inc.
 * All rights reserved.
 ****************************************************************************/


#pragma once

#include <portalApp/dllExport.h>

#include <QtCore/QObject>
#include <QtCore/QPair>
#include <QtCore/QMap>
#include <QWidget>
#include <QPixmap>
#include <QImage>
#include <QPen>

#include <utility>
#include <list>


class QPainter;


class DT_DLL_LIBPORTALAPP  DtProgressiveLineGraph  : public QWidget
{  Q_OBJECT;
public:

      DtProgressiveLineGraph( int rangeMin, int rangeMax, bool autoScale, QWidget* parent );

      virtual ~DtProgressiveLineGraph();

      void addSet( int set, QPen pen, int initial, bool valueCentered = false );

      void insertValue( int set, double percent, int value );

      virtual void resetAllValues( int value );

      virtual void resetValues( int set, int value );

      virtual void clearValues( int set );

      virtual void clearAllValues();

      virtual void offsetPercentages( double percentOffset );

      virtual void offsetPercentages( int set, double percentOffset );

      virtual void setRange( int min, int max );

      virtual int rangeMinimum() const;
      virtual int rangeMaximum() const;

      virtual bool autoScale() const;

      virtual void setAutoScale( bool value );

      virtual void setNegativeReflection( bool positive );

      virtual void useBackgroundGradient( bool useIt );

      virtual bool usesBackgroundGradient() const;

      virtual void drawAsVerticalLines( bool useVerticalLines );

      virtual bool usesVerticalLines() const;

      void forceUpdate( bool widgetUpdate );

protected:

      typedef std::list< std::pair<double,int> > PercentValueMap;

      struct Set
      {
         PercentValueMap myValues;
         QPen myPen;
         bool myValuesCentered;
         int myMax;
         int myMin;
      };

      typedef std::map<int,DtProgressiveLineGraph::Set*> SetMap;

      virtual void resizeEvent( QResizeEvent* e );

      virtual void paintEvent( QPaintEvent* );

      virtual void draw( QPainter& painter, const QRect& rect );

      virtual void paintBackground( QPainter& painter );

      virtual int getSeparation() const;

      virtual void paintLines( QPainter& painter, Set& set );

      virtual int desiredRange() const;

      void paintVerticalLines( PercentValueMap& set, QRectF svp, 
         int rangeHeight, QPainter& painter, QPen pen, bool centered);

      void paintConnectedLines( PercentValueMap& set, QRectF svp, 
         int rangeHeight, QPainter& painter, QPen pen );

      int desiredMinimum() const;

      int myInitialMinimumRange;
      int myInitialMaximumRange;

      int myMinimumRange;
      int myMaximumRange;
      bool myAutoScale;
      bool myActive;

      SetMap mySets;
      QPixmap myGradBack;
      QPixmap* myLineBuffer;
      QPolygon* myPointCache;

      bool myUseCachedGraph;
      bool myUseGradient;
      bool myGraphNeedsUpdating;
      bool myUseVerticalLines;
      bool myNegativeReflection;

};