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ledmeter.h Example File
graphicsview/portedasteroids/ledmeter.h

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 /*
  * KAsteroids - Copyright (c) Martin R. Jones 1997
  *
  * Part of the KDE project
  */

 #ifndef __LEDMETER_H__
 #define __LEDMETER_H__

 #include <q3frame.h>
 #include <q3ptrlist.h>
 //Added by qt3to4:
 #include <QResizeEvent>

 class KALedMeter : public Q3Frame
 {
     Q_OBJECT
 public:
     KALedMeter( QWidget *parent );

     int range() const { return mRange; }
     void setRange( int r );

     int count() const { return mCount; }
     void setCount( int c );

     int value () const { return mValue; }

     void addColorRange( int pc, const QColor &c );

 public slots:
     void setValue( int v );

 protected:
     virtual void resizeEvent( QResizeEvent * );
     virtual void drawContents( QPainter * );
     void calcColorRanges();

 protected:
     struct ColorRange
     {
         int mPc;
         int mValue;
         QColor mColor;
     };

     int mRange;
     int mCount;
     int mCurrentCount;
     int mValue;
     Q3PtrList<ColorRange> mCRanges;
 };

 #endif


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Qt 4.3.5