A canvas sprite is an object which can contain any number of images (referred to as frames), only one of which is current, i.e. displayed, at any one time. The images can be passed in the constructor or set or changed later with setSequence(). If you subclass TQCanvasSprite you can change the frame that is displayed periodically, e.g. whenever TQCanvasItem::advance(1) is called to create the effect of animation.
The current frame can be set with setFrame() or with move(). The number of frames available is given by frameCount(). The bounding rectangle of the current frame is returned by boundingRect().
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The current frame's image can be retrieved with image(); use imageAdvanced() to retrieve the image for the frame that will be shown after advance(1) is called. Use the image() overload passing it an integer index to retrieve a particular image from the list of frames.
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Use width() and height() to retrieve the dimensions of the current frame.
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Use leftEdge() and rightEdge() to retrieve the current frame's left-hand and right-hand x-coordinates respectively. Use bottomEdge() and topEdge() to retrieve the current frame's bottom and top y-coordinates respectively. These functions have an overload which will accept an integer frame number to retrieve the coordinates of a particular frame.
Like any other canvas item, canvas sprites can be moved with move() which sets the x and y coordinates and the frame number, as well as with TQCanvasItem::move() and TQCanvasItem::moveBy(), or by setting coordinates with TQCanvasItem::setX(), TQCanvasItem::setY() and TQCanvasItem::setZ().
\fCTQCanvasSprite::Oscillate\fR - at each advance the frame number will be incremented by 1 up to the frame count then decremented to by 1 to 0, repeating this sequence forever.
Returns the y-coordinate of the current bottom edge of the sprite. (This may change as the sprite animates since different frames may have different bottom edges.)
Returns the bounding rectangle for the image in the sprite's current frame. This assumes that the images are tightly cropped (i.e. do not have transparent pixels all along a side).
Returns the x-coordinate of the current left edge of the sprite. (This may change as the sprite animates since different frames may have different left edges.)
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See also rightEdge(), bottomEdge(), and topEdge().
Set the position of the sprite to \fInx\fR, \fIny\fR and the current frame to \fInf\fR. \fInf\fR will be ignored if it is larger than frameCount() or smaller than 0.
Returns the x-coordinate of the current right edge of the sprite. (This may change as the sprite animates since different frames may have different right edges.)
Sets the animation frame used for displaying the sprite to \fIf\fR, an index into the TQCanvasSprite's TQCanvasPixmapArray. The call will be ignored if \fIf\fR is larger than frameCount() or smaller than 0.
Sets the animation characteristics for the sprite.
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For \fItype\fR == Cycle, the frames will increase by \fIstep\fR at each advance, modulo the frameCount().
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For \fItype\fR == Oscillate, the frames will increase by \fIstep\fR at each advance, up to the frameCount(), then decrease by \fIstep\fR back to 0, repeating forever.
