C
WORD BtnDraw( void * pObj );
Overview
This function renders the object on the screen using the current parameter settings. Location of the object is determined by the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined by the style scheme set.
The text on the face of the button is drawn on top of the bitmap. Text is always rendered centered on the face of the button.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is started. This is to avoid incomplete object rendering.
Input Parameters
|
Input Parameters |
Description |
|
pB |
Pointer to the object to be rendered. |
Returns
Returns the status of the drawing
- 1 - If the rendering was completed and
- 0 - If the rendering is not yet finished.
Preconditions
Object must be created before this function is called.
Side Effects
none
Example
void MyGOLDraw(){ static OBJ_HEADER *pCurrentObj = NULL; int done; // There are no objects if(GOLGetList() == NULL) return; // If it's last object jump to head if(pCurrentObj == NULL) pCurrentObj = GOLGetList(); done = 0; // this only process Button and Window while(pCurrentObj != NULL){ // check if object state indicates redrawing done = pCurrentObj->draw(pCurrentObj); if(done){ // reset only the state if drawing was finished pCurrentObj->state = 0; }else{ // done processing the list return; } } // go to next object pCurrentObj = pCurrentObj->pNxtObj; } }