10 #ifndef QWT_PLOT_RASTERITEM_H 
   11 #define QWT_PLOT_RASTERITEM_H 
   13 #include "qwt_global.h" 
   14 #include "qwt_plot_item.h" 
   15 #include "qwt_interval.h" 
   76         PaintInDeviceResolution = 1
 
   89     void setAlpha( 
int alpha );
 
   95     void invalidateCache();
 
   97     virtual void draw( QPainter *p,
 
   99         const QRectF &rect ) 
const;
 
  101     virtual QRectF pixelHint( 
const QRectF & ) 
const;
 
  121     virtual QImage renderImage( 
const QwtScaleMap &xMap,
 
  123         const QSize &imageSize ) 
const = 0;
 
  127         const QSize &imageSize, 
double pixelSize) 
const;
 
  136         const QRectF &imageArea, 
const QRectF &paintRect,
 
  137         const QSize &imageSize, 
bool doCache) 
const;