This class is provided for Forms compatibility. It provides 2D input.
It would be useful if this could be put atop another widget so that the
crosshairs are on top, but this is not implemented. The color of the
crosshairs is selection_color().
Creates a new Fl_Positioner widget using the given position,
size, and label string. The default boxtype is FL_NO_BOX.
Deletes the widget.
Returns the current position in x and y.
Gets or sets the X axis bounds.
Sets the stepping value for the X axis.
Gets or sets the X axis coordinate.
Gets or sets the Y axis bounds.
Sets the stepping value for the Y axis.
Gets or sets the Y axis coordinate.