-/*
- * Calculate which tiles need to be redrawn after resizing. This is the
- * tiles which (at the new size) are fully contained in the previous area.
- *
- * When shrinking, this is all tiles, but when enlarging, the generated
- * expose events will trigger drawing of the new area.
- */
-static uint_fast32_t resize_helper(Widget w, Dimension *oldsz, int gridsz)
-{
- Dimension new_w, new_h, common_w, common_h;
-
- if (!XtIsRealized(w))
- return 0;
-
- XtVaGetValues(w, XmNwidth, &new_w, XmNheight, &new_h, (char *)NULL);
- common_w = MIN(new_w, oldsz[0]);
- common_h = MIN(new_h, oldsz[1]);
- oldsz[0] = new_w;
- oldsz[1] = new_h;
- new_w /= gridsz;
- new_h /= gridsz;
-
- /* Round down to multiple of tile dimensions */
- common_w = common_w / new_w * new_w;
- common_h = common_h / new_h * new_h;
-
- if (new_w > 0 && new_h > 0)
- return expose_mask(0, 0, common_w, common_h, new_w, new_h);
- return 0;
-}
-