ART_edit

ART_edit_undo

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This function reverses any changes made to any mark.

Declaration:

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AT_ERRCOUNT ART_edit_undo(HIGEAR hIGear);

Arguments:

Name	Type	Description
hIGear	HIGEAR	HIGEAR handle to the image.

Return Value:

Returns the number of ImageGear errors that occurred during the function call.

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.

Sample:

Annotation

Example:

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HIGEAR hIGear; /* HIGEAR handle of image / AT_ERRCOUNT nErrcount; / tally of IG errors on / / stack / HWND hWnd; / Windows handle to / / image window */ nErrcount = ART_edit_undo(hIGear); nErrcount = ART_GUI_mark_paint(hIGear, IG_GRP_DEFAULT, ART_INVALID_ID, hWnd, TRUE);

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HIGEAR hIGear; /* HIGEAR handle of image */
AT_ERRCOUNT nErrcount; /* tally of IG errors on */
/* stack  */
HWND hWnd; /* Windows handle to */
/* image window  */
nErrcount = ART_edit_undo(hIGear);
nErrcount = ART_GUI_mark_paint(hIGear, IG_GRP_DEFAULT, 
ART_INVALID_ID, hWnd, TRUE);

Remarks:

Reversible operations include: creation, modification, selection, and deletion of marks. To clear the list of undo operations stored in memory, call ART_edit_undo_clear() function.

An error is set if any of the following conditions are met:

hIGear does not reference a valid ImageGear handle.

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