Question

The QCanvasPixmap class provides pixmaps for QCanvasSprites. More...

#include <qcanvas.h>

Inherits QPixmap.

List of all member functions.

Public Members

• QCanvasPixmap ( constQString&datafilename )
• QCanvasPixmap ( constQImage&image )
• QCanvasPixmap ( constQPixmap&pm, constQPoint&offset )
• ~QCanvasPixmap ()
• int offsetX () const
• int offsetY () const
• void setOffset ( intx, inty )

---

Detailed Description

The QCanvasPixmap class provides pixmaps for QCanvasSprites.

If you want to show a single pixmap on a QCanvas use a QCanvasSprite with just one pixmap.

When pixmaps are inserted into a QCanvasPixmapArray they are held as QCanvasPixmaps. QCanvasSprites are used to show pixmaps on QCanvases and hold their pixmaps in a QCanvasPixmapArray. If you retrieve a frame (pixmap) from a QCanvasSprite it will be returned as a QCanvasPixmap.

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 QImageIO).

QCanvasPixmap can have a hotspot which is defined in terms of an (x, y) offset. When you create a QCanvasPixmap 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 QCanvasPixmap is used in a QCanvasSprite, the offset position is the point at QCanvasItem::x() and QCanvasItem::y(), not the top-left corner of the pixmap.

Note that for QCanvasPixmap objects created by a QCanvasSprite, the position of each QCanvasPixmap object is set so that the hotspot stays in the same position.

See also QCanvasPixmapArray, QCanvasItem, QCanvasSprite, Graphics Classes and Image Processing Classes.

---

Member Function Documentation

QCanvasPixmap::QCanvasPixmap ( constQString&datafilename )

Constructs a QCanvasPixmap that uses the image stored in datafilename.

QCanvasPixmap::QCanvasPixmap ( constQImage&image )

Constructs a QCanvasPixmap from the image image.

QCanvasPixmap::QCanvasPixmap ( constQPixmap&pm, constQPoint&offset )

Constructs a QCanvasPixmap from the pixmap pm using the offset offset.

QCanvasPixmap::~QCanvasPixmap ()

Destroys the pixmap.

int QCanvasPixmap::offsetX () const

Returns the x-offset of the pixmap's hotspot.

See also setOffset().

int QCanvasPixmap::offsetY () const

Returns the y-offset of the pixmap's hotspot.

See also setOffset().

void QCanvasPixmap::setOffset ( intx, inty )

Sets the offset of the pixmap's hotspot to (x, y).

Warning: Do not call this function if any QCanvasSprites are currently showing this pixmap.