/*!
sets a region to contain only one rect.
*/
BOOL gdi_set_cliprgn(cliprgn_t *p_rgn, const rect_t *p_rc)
{
cliprc_t *p_nrc = NULL;
if(is_empty_rect(p_rc))
{
return FALSE;
}
// empty rgn, at first
gdi_empty_cliprgn(p_rgn);
// get a new cliprect
p_nrc = gdi_alloc_cliprect(p_rgn->p_heap);
if(p_nrc == NULL)
{
return FALSE;
}
// set cliprect
p_nrc->rc = *p_rc;
p_nrc->p_next = NULL;
p_nrc->p_prev = NULL;
p_rgn->p_head = p_rgn->p_tail = p_nrc;
p_rgn->bound = *p_rc;
return TRUE;
}
tpoint twidget::get_best_size() const
{
if (is_empty_rect(fix_rect_)) {
tpoint result = layout_size_;
if (result == tpoint(0, 0)) {
result = calculate_best_size();
}
return result;
} else {
return tpoint(fix_rect_.w, fix_rect_.h);
}
}
/*!
subtracts a rectangle from a region.
*/
BOOL gdi_subtract_cliprect(cliprgn_t *p_rgn, const rect_t *p_rc)
{
cliprgn_t nrgn;
cliprc_t crc;
if(is_empty_rect(p_rc))
{
return FALSE;
}
crc.rc = *p_rc;
crc.p_next = NULL;
crc.p_prev = NULL;
nrgn.bound = *p_rc;
nrgn.p_head = &crc;
nrgn.p_tail = &crc;
nrgn.p_heap = NULL;
return gdi_subtract_cliprgn(p_rgn, p_rgn, &nrgn);
}
