本文整理汇总了C++中ImageWindow::ZoomFactor方法的典型用法代码示例。如果您正苦于以下问题：C++ ImageWindow::ZoomFactor方法的具体用法？C++ ImageWindow::ZoomFactor怎么用？C++ ImageWindow::ZoomFactor使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ImageWindow的用法示例。
在下文中一共展示了ImageWindow::ZoomFactor方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: DynamicPaint
void AnnotationInterface::DynamicPaint( const View& v, VectorGraphics& g, const DRect& r ) const
{
// we need valid view and annotation must be placed
if ( view == 0 || v != *view || !annotationPlaced )
return;
// are we painting to rect with annotation?
if ( !totalRect.Intersects( r ) )
return;
// get the image window
ImageWindow w = view->Window();
// render annotation to bitmap if needed
if ( annotationBmp.IsNull() )
{
relPosX = 0;
relPosY = 0;
annotationBmp = AnnotationRenderer::CreateAnnotationBitmap( instance, relPosX, relPosY, true );
screenBmp = Bitmap::Null();
}
// compute viewport coordinates of annotation text
int posX = instance.annotationPositionX - relPosX;
int posY = instance.annotationPositionY - relPosY;
w.ImageToViewport( posX, posY );
// compute zoom factor
int zoomFactor = w.ZoomFactor();
double z = (zoomFactor < 0) ? -1.0/zoomFactor : double( zoomFactor );
// draw bitmap, scaled according to zoom factor
Rect zr( RoundI( annotationBmp.Width()*z ), RoundI( annotationBmp.Height()*z ) );
if ( screenBmp.IsNull() || zr != screenBmp.Bounds() )
if ( zoomFactor < 0 )
screenBmp = annotationBmp.Scaled( z );
else
screenBmp = annotationBmp;
if ( zoomFactor < 0 )
g.DrawBitmap( posX, posY, screenBmp );
else
g.DrawScaledBitmap( zr.MovedTo( posX, posY ), screenBmp );
}