Tests if the point at (x, y) is contained in widget.
The coordinates for (x, y) must be in widget coordinates, so (0, 0) is assumed to be the top left of widget's content area.
X coordinate to test, relative to widget's origin
Y coordinate to test, relative to widget's origin
true if widget contains (x, y).
Tests if the point at (x, y) is contained in widget.
The coordinates for (x, y) must be in widget coordinates, so (0, 0) is assumed to be the top left of widget's content area.