Function GetAlignedPosition

src/widget.cpp:138–156

* Calculate x and y coordinates for an aligned object within a window. * @param r Rectangle of the widget to be drawn in. * @param d Dimension of the object to be drawn. * @param align Alignment of the object. * @return A point containing the position at which to draw. */

 * @return A point containing the position at which to draw.
 */
static inline Point GetAlignedPosition(const Rect &r, const Dimension &d, StringAlignment align)
{
	Point p;
	/* In case we have a RTL language we swap the alignment. */
	if (!(align & SA_FORCE) && _current_text_dir == TD_RTL && (align & SA_HOR_MASK) != SA_HOR_CENTER) align ^= SA_RIGHT;
	switch (align & SA_HOR_MASK) {
		case SA_LEFT:       p.x = r.left; break;
		case SA_HOR_CENTER: p.x = CentreBounds(r.left, r.right, d.width); break;
		case SA_RIGHT:      p.x = r.right + 1 - d.width; break;
		default: NOT_REACHED();
	}
	switch (align & SA_VERT_MASK) {
		case SA_TOP:         p.y = r.top; break;
		case SA_VERT_CENTER: p.y = CentreBounds(r.top, r.bottom, d.height); break;
		case SA_BOTTOM:      p.y = r.bottom + 1 - d.height; break;
		default: NOT_REACHED();
	}
	return p;
}

/**
 * Compute the vertical position of the draggable part of scrollbar