C
#define IsObjUpdated(pObj) (((OBJ_HEADER *)pObj)->state & 0xfc00)
Overview
This macro tests if the object is pending to be redrawn. This is done by testing the 6 MSBits of object�s state to detect if the object must be redrawn.
Input Parameters
|
Input Parameters |
Description |
|
pObj |
Pointer to the object of interest. |
Returns
Returns a nonzero value if the object needs to be redrawn. Zero if not.
Preconditions
none
Side Effects
none
Example
int DrawButtonWindowOnly() { static OBJ_HEADER *pCurrentObj = NULL; SHORT done = 0; if (pCurrentObj == NULL) pCurrentObj = GOLGetList(); // get current list while(pCurrentObj != NULL){ if(IsObjUpdated(pCurrentObj)){ done = pCurrentObj->draw(pCurrentObj); // reset state of object if done if (done) GOLDrawComplete(pCurrentObj) // Return if not done. This means that BtnDraw() // was terminated prematurely by device busy status // and must be recalled to finish rendering of // objects in the list that have new states. else return 0; } // go to the next object in the list pCurrentObj = pCurrentObj->pNxtObj; } return 1; }