Set widget rectangle to specified value and layout widget contents. (Step 2 of two phase layout).
Measure widget according to desired width and height constraints. (Step 1 of two phase layout).
Draw widget at its position to buffer
returns linear layout orientation (Vertical, Horizontal)
sets linear layout orientation
returns number of children of this widget
returns child by index
adds child, returns added item
removes child, returns removed item
removes child by ID, returns removed item
returns index of widget in child list, -1 if passed widget is not a child of this widget