Updates the bounding box of a shape
Bool XkbComputeShapeBounds (\^XkbShapePtr shape\^);
- shape
shape to be examined
Xkb provides a number of convenience functions to help use a keyboard geometry. These include functions to return the bounding box of a shape's top surface and to update the bounding box of a shape row or section.
A shape is made up of a number of outlines. Each outline is a polygon made up of a number of points. The bounding box of a shape is a rectangle that contains all the outlines of that shape.
A ShapeRec contains a BoundsRec that describes the bounds of the shape. If you add or delete an outline to or from a shape, the bounding box must be updated.
XkbComputeShapeBounds updates the BoundsRec contained in the shape by examining all the outlines of the shape and setting the BoundsRec to the minimum x and minimum y, and maximum x and maximum y values found in those outlines. XkbComputeShapeBounds returns False if shape is NULL or if there are no outlines for the shape; otherwise, it returns True.
If you add or delete a key to or from a row, or if you update the shape of one of the keys in that row, you may need to update the bounding box of that row. To update the bounding box of a row, use XkbComputeRowBounds.
typedef struct _XkbShape { Atom name; /\(** shape's name */ unsigned short num_outlines; /\(** number of outlines for the shape */ unsigned short sz_outlines; /\(** size of the outlines array */ XkbOutlinePtr outlines; /\(** array of outlines for the shape */ XkbOutlinePtr approx; /\(** pointer into the array to the approximating outline */ XkbOutlinePtr primary; /\(** pointer into the array to the primary outline */ XkbBoundsRec bounds; /\(** bounding box for the shape; encompasses all outlines */ } XkbShapeRec, *XkbShapePtr; typedef struct _XkbBounds { short x1,y1; /\(** upper left corner of the bounds, in mm/10 */ short x2,y2; /\(** lower right corner of the bounds, in mm/10 */ } XkbBoundsRec, *XkbBoundsPtr;