Function ComputeMenuGeometry

micropolis-activity/src/tk/tkmenu.c:1339–1477

(clientData)

 *
 * Side effects:
 *	Fields of menu entries are changed to reflect their
 *	current positions, and the size of the menu window
 *	itself may be changed.
 *
 *--------------------------------------------------------------
 */

static void
ComputeMenuGeometry(clientData)
    ClientData clientData;		/* Structure describing menu. */
{
    Menu *menuPtr = (Menu *) clientData;
    register MenuEntry *mePtr;
    XFontStruct *fontPtr;
    int maxLabelWidth, maxSelectorWidth, maxAccelWidth;
    int width, height, selectorSpace, horizMargin;
    int i, y;

    if (menuPtr->tkwin == NULL) {
	return;
    }

    maxLabelWidth = maxSelectorWidth = maxAccelWidth = 0;
    y = menuPtr->borderWidth;

    for (i = 0; i < menuPtr->numEntries; i++) {
	mePtr = menuPtr->entries[i];
	selectorSpace = 0;
	fontPtr = mePtr->fontPtr;
	if (fontPtr == NULL) {
	    fontPtr = menuPtr->fontPtr;
	}

	/*
	 * For each entry, compute the height required by that
	 * particular entry, plus three widths:  the width of the
	 * label, the width to allow for a selector to be displayed
	 * to the left of the label (if any), and the width of the
	 * accelerator to be displayed to the right of the label
	 * (if any).  These sizes depend, of course, on the type
	 * of the entry.
	 */

	if (mePtr->bitmap != None) {
	    unsigned int bitmapWidth, bitmapHeight;

#if defined(USE_XPM3)
	    Tk_SizeOfPixmap(mePtr->bitmap, &bitmapWidth, &bitmapHeight);
#else
	    Tk_SizeOfBitmap(mePtr->bitmap, &bitmapWidth, &bitmapHeight);
#endif
	    mePtr->height = bitmapHeight;
	    width = bitmapWidth;
	    if (mePtr->type == CHECK_BUTTON_ENTRY) {
		selectorSpace = (14*mePtr->height)/10;
		mePtr->selectorDiameter = (65*mePtr->height)/100;
	    } else if (mePtr->type == RADIO_BUTTON_ENTRY) {
		selectorSpace = (14*mePtr->height)/10;