The Q3CanvasPixmap class provides pixmaps for Q3CanvasSprites. 更多...
| 头： | #include <Q3CanvasPixmap> |
| 继承： | QPixmap |
| Q3CanvasPixmap (const QString & datafilename ) | |
| Q3CanvasPixmap (const QImage & image ) | |
| Q3CanvasPixmap (const QPixmap & pm , const QPoint & offset ) | |
| ~Q3CanvasPixmap () | |
| int | offsetX () const |
| int | offsetY () const |
| void | setOffset (int x , int y ) |
The Q3CanvasPixmap class provides pixmaps for Q3CanvasSprites.
If you want to show a single pixmap on a Q3Canvas use a Q3CanvasSprite with just one pixmap.
When pixmaps are inserted into a Q3CanvasPixmapArray they are held as Q3CanvasPixmaps. Q3CanvasSprite s are used to show pixmaps on Q3Canvas es and hold their pixmaps in a Q3CanvasPixmapArray . If you retrieve a frame (pixmap) from a Q3CanvasSprite it will be returned as a Q3CanvasPixmap .
The pixmap is a QPixmap and can only be set in the constructor. There are three different constructors, one taking a QPixmap , one a QImage and one a file name that refers to a file in any supported file format (see QImageReader ).
Q3CanvasPixmap can have a hotspot which is defined in terms of an (x, y) offset. When you create a Q3CanvasPixmap from a PNG file or from a QImage that has a QImage::offset (), the offset() is initialized appropriately, otherwise the constructor leaves it at (0, 0). You can set it later using setOffset (). When the Q3CanvasPixmap is used in a Q3CanvasSprite , the offset position is the point at Q3CanvasItem::x () 和 Q3CanvasItem::y (), not the top-left corner of the pixmap.
Note that for Q3CanvasPixmap objects created by a Q3CanvasSprite , the position of each Q3CanvasPixmap object is set so that the hotspot stays in the same position.
另请参阅 Q3CanvasPixmapArray , Q3CanvasItem , Q3CanvasSprite , QtCanvas ，和 Porting to Graphics View .
构造 Q3CanvasPixmap that uses the image stored in datafilename .
构造 Q3CanvasPixmap from the image image .
构造 Q3CanvasPixmap from the pixmap pm using the offset offset .
销毁像素图。
Returns the x-offset of the pixmap's hotspot.
另请参阅 setOffset ().
Returns the y-offset of the pixmap's hotspot.
另请参阅 setOffset ().
Sets the offset of the pixmap's hotspot to ( x , y ).
警告： Do not call this function if any Q3CanvasSprites are currently showing this pixmap.
