1.7.3 BLOX.BCanvasObject: widget protocol

create

If the object has not been created yet and has been initialized correctly, insert it for real in the parent canvas

created

Answer whether the object is just a placeholder or has already been inserted for real in the parent canvas

lower

Move the item to the lowest position in the display list. Child widgets always obscure other item types, and the stacking order of window items is determined by sending methods to the widget object directly.

raise

Move the item to the highest position in the display list. Child widgets always obscure other item types, and the stacking order of window items is determined by sending methods to the widget object directly.

redraw

Force the object to be displayed in the parent canvas, creating it if it has not been inserted for real in the parent, and refresh its position if it has changed.

remove

Remove the object from the canvas

show

Ensure that the object is visible in the center of the canvas, scrolling it if necessary.