切換之間的三個狀態JToggleButton中

Question

我如何能實現三態切換按鈕？我使用的是eclipse和windowBuilder，我編寫的程序必須具有三態按鈕。我用JToggleButtons和他們的兩個狀態兩個BU不能實現第三個狀態。我能做什麼？

P.S.我想要三個圖標狀態。

Answer 1

也許你可以看看com.jidesoft.swing.TristateCheckBox使用的代碼：
請參閱TristateCheckBox.java。

它從JToggleButton繼承並有三種不同的圖標狀態。

/** 
* Maintenance tip - There were some tricks to getting this code 
* working: 
* <p/> 
* 1. You have to overwite addMouseListener() to do nothing 
* 2. You have to add a mouse event on mousePressed by calling 
* super.addMouseListener() 
* 3. You have to replace the UIActionMap for the keyboard event 
* "pressed" with your own one. 
* 4. You have to remove the UIActionMap for the keyboard event 
* "released". 
* 5. You have to grab focus when the next state is entered, 
* otherwise clicking on the component won't get the focus. 
* 6. You have to make a TristateDecorator as a button model that 
* wraps the original button model and does state management. 
* 
* @author Dr. Heinz M. Kabutz 
*/ 
public class TristateCheckBox extends JCheckBox {