DragASprite (changes)

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Programmer's Reference Manuals

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» DragASprite

The DragASprite module provides functionality to drag a sprite around the screen using the pointer.

To drag a sprite the following process steps should be followed:

1. Choose a sprite that you wish to use to display when dragging
2. Call the SWI DragASprite_Start to begin the drag. This SWI takes a copy of the sprite so the original can be removed from memory if required
3. When the Wimp sends an indication that the drag has finished via Wimp_Poll, DragASprite_Stop should then be called.

Notes

Because a user may not wish for a sprite to be displayed, for whatever reason, a well written application should always check user preferences to see if a sprite should be displayed, or alternatively just display an outline.

Details

• SWI Calls