Java Swing, 2nd Edition

The JToggleButton.ToggleButtonModel Class

As we mentioned earlier, JToggleButton does not use the DefaultButtonModel class as its model. ToggleButtonModel, a public static inner class that extends DefaultButtonModel, is used instead.

Properties

ToggleButtonModel modifies the methods for working with the properties listed in Table 5-11. New implementations of isSelected( ) and setSelected( ) use the button’s ButtonGroup (if defined) to keep track of which button is selected, ensuring that even if multiple selected buttons are added to a group, only the first one is considered selected (since the group keeps track of the “officially” selected button). In addition, the setPressed( ) method is redefined to call setSelected( ) when the button is released (if it is armed)

Table 5-11. JToggleButton.ToggleButtonModel properties

Property	Data type	get	is	set	Default value
pressedo	boolean		·	·	false
selectedo	boolean		·	·	false
ooverridden See also properties from DefaultButtonModel (Table 5-3).