ImageGear Professional v18.2 > API Reference Guide > ART Component API Reference > ART Component Callback Functions Reference > LPFNIG_ART_CREATENOTIFYFUNC |
This function is called by the library after a mark is created.
Copy Code
|
|
---|---|
typedef BOOL (ACCUAPI* LPFNART_CREATENOTIFYFUNC)( HIGEAR hIGear, LPVOID lpPrivate, ART_MARK_INDEX hMarkIndex, LPART_MARK_ATTRIBUTES lpMarkAttr ); |
Name | Type | Description |
hIGear | HIGEAR | HIGEAR handle to the image. |
lpPrivate | LPVOID | A far pointer to the private callback data. |
hMarkIndex | ART_MARK_INDEX | The index identifier for the mark just created. |
lpMarkAttr | LPART_MARK_ATTRIBUTES | A far pointer to an ART-defined attribute structure of type ART_MARK_ATTRIBUTES. |
Returns TRUE - mark is created; FALSE - mark isn't created.
All pixel formats supported by ImageGear Professional.
None
Copy Code
|
|
---|---|
BOOL ACCUAPI ARTCreateNotify( HIGEAR hIGear, LPVOID lpPrivate, ART_MARK_INDEX hMarkIndex, const LPART_MARK_ATTRIBUTES lpMarkAttr) { /* add a named block to each mark that gets created */ ART_mark_block_create(hIGear, hMarkIndex, myBlockName, myBlockData, myBlockSize); return TRUE; } |
If the callback function returns TRUE, the mark is created; if it returns FALSE, the mark is not created. This callback gives you the opportunity to determine whether a mark is created or not.
The callback for "Pre-create" happens before the end user draws the mark. For example, if the user is drawing a line, LPFNIG_ART_PRECREATENOTIFYFUNC is called when the mouse is pressed. If this callback returns TRUE, then the point where the mouse was pressed becomes the first end-point of the line. The point where the user releases the mouse button becomes the second end-point. At this time LPFNIG_ART_CREATENOTIFYFUNC is called.
In order to use this callback, it must be registered with ART using the function ART_callback_register(). |