IlvBitmapAnimationHandler Class Reference

Animation handler class. More...

#include <ilviews/base/port.h>

Public Member Functions
virtual void	drawFrame (IlvPort *dst, IlvPalette *palette, const IlvRect &rect, IlUInt frame, const IlvRegion *clip, IlvPosition alignment, IlBoolean transparent) const =0
	Called to draw the specified frame. More...
virtual IlUInt	getFrameDelay (IlUInt frame) const =0
	Returns the delay between the specified frame and the next frame. More...
virtual IlUInt	getFramesCount () const =0
	Returns the number of frames of the animation. More...
virtual IlBoolean	isLastFrame (IlUInt frame) const
	Returns IlTrue if the specified frame is the last one. More...

Detailed Description

Animation handler class.

Library: display

The IlvBitmapAnimationHandler class is an abstract class that handles animation of IlvBitmap. objects. It defines several virtual methods that need to be redefined in subclasses. The animation is supported by the following objects: IlvIcon, IlvTransparentIcon, and IlvGadgetItem.

See Also

IlvBitmap

Member Function Documentation

virtual void IlvBitmapAnimationHandler::drawFrame ( IlvPort *  dst, IlvPalette *  palette, const IlvRect &  rect, IlUInt  frame, const IlvRegion *  clip, IlvPosition  alignment, IlBoolean  transparent  ) const

pure virtual

Called to draw the specified frame.

Parameters

dst	The port in which the drawing should be done.
palette	The palette.
rect	The bounding box of the bitmap.
frame	The frame index.
clip	The clip.
alignment	The alignment of the bitmap inside rect.
transparent	A Boolean value specifying whether the drawing should be transparent.

virtual IlUInt IlvBitmapAnimationHandler::getFrameDelay ( IlUInt  frame ) const

pure virtual

Returns the delay between the specified frame and the next frame.

Parameters

frame

The frame index.

Returns

The delay between the specified frame and the next frame.

See Also

getFramesCount

virtual IlUInt IlvBitmapAnimationHandler::getFramesCount ( ) const

pure virtual

Returns the number of frames of the animation.

If you do not know how many frames your animation will have, redefine this member function to return (IlUInt)-1. Then you need to redefine the isLastFrame method.

Returns

The number of frames of the animation.

See Also

isLastFrame

virtual IlBoolean IlvBitmapAnimationHandler::isLastFrame ( IlUInt  frame ) const

virtual

Returns IlTrue if the specified frame is the last one.

The default implementation calls getFramesCount and compares the returned value with frame. You can override this member function if you do not know how many frames your animation will have.

Parameters

frame

The frame index.

Returns

IlTrue if frame is the last frame.

See Also

getFramesCount