我正在使用 Model View Controller 算法创建一个。如果我在 Controller 类中定义了 JButton 的实例。例如,我有:一个用于重置、退出、撤消、重做和设置的按钮。
我已经实现了他们的actionListeners。在我的 Controller 类中,是 actionPerformed() 方法所在的位置。我实现了所有 5 个按钮。现在按钮已设置为启用。但是,当重做和撤消被禁用并且我按下重置按钮时,它们将保持禁用状态。如何重置重做和撤消按钮的状态。
这是我的 GameController 类,特别是 actionPerformed:
public void actionPerformed(ActionEvent e) {
if (e.getSource() instanceof DotButton) {
try {
undo.push((GameModel) gameModel.clone());
} catch (CloneNotSupportedException g) {
g.printStackTrace();
}
if(gameModel.getNumberOfSteps()==0){
int row = ((DotButton)(e.getSource())).getRow();
int column = ((DotButton)(e.getSource())).getColumn();
gameModel.capture(row,column);
gameModel.step();
}
selectColor(((DotButton)(e.getSource())).getColor());
} else if (e.getSource() instanceof JButton) {
JButton clicked = (JButton)(e.getSource());
if (clicked.getText().equals("Quit")) {
/*try {
serialization.serialize(gameModel, "savedGame.ser");
} catch (IOException f) {
f.printStackTrace();
}*/
System.exit(0);
} else if (clicked.getText().equals("Reset")){
reset();
if (clicked.getText().equals("Redo")) {
clicked.setEnabled(true);
}
if (clicked.getText().equals("Undo")) {
clicked.setEnabled(true);
}
} else if (clicked.getText().equals("Redo")) {
if (redo.isEmpty()) {
clicked.setEnabled(false);
}
try {
redo();
} catch (CloneNotSupportedException g) {
g.printStackTrace();
}
}
else if (clicked.getText().equals("Undo")) {
if (undo.isEmpty()) {
clicked.setEnabled(false);
}
try {
undo();
} catch (CloneNotSupportedException g) {
g.printStackTrace();
}
}
else if (clicked.getText().equals("Settings")) {
gameView.settingsMenu();
}
} else if (e.getSource() instanceof JRadioButton) {
JRadioButton clickedR = (JRadioButton)(e.getSource());
if (clickedR.getText().equals("Torus")) {
setting1 = true;
}
if (clickedR.getText().equals("Diagonal")) {
setting2 = true;
}
}
这是我创建按钮的 GameView 类:
public GameView(GameModel model, GameController gameController){
super("Flood it -- the ITI 1121 version");
this.gameModel = model;
this.gameController = gameController;
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBackground(Color.WHITE);
JPanel panel = new JPanel();
panel.setBackground(Color.WHITE);
panel.setLayout(new GridLayout(gameModel.getSize(), gameModel.getSize()));
panel.setBorder(BorderFactory.createEmptyBorder(20, 20, 0, 20));
board = new DotButton[gameModel.getSize()][gameModel.getSize()];
for (int row = 0; row < gameModel.getSize(); row++) {
for (int column = 0; column < gameModel.getSize(); column++) {
board[row][column] = new DotButton(row, column, gameModel.getColor(row,column),
(gameModel.getSize() < 26 ? DotButton.MEDIUM_SIZE : DotButton.SMALL_SIZE));
board[row][column].addActionListener(gameController);
panel.add(board[row][column]);
}
}
add(panel, BorderLayout.CENTER);
buttons = new JButton[5];
buttons[0] = new JButton("Reset");
buttons[1] = new JButton("Quit");
buttons[2] = new JButton("Undo");
buttons[3] = new JButton("Redo");
buttons[4] = new JButton("Settings");
for (JButton button : buttons) {
button.setFocusPainted(false);
button.addActionListener(gameController);
}
JPanel settingsPanel = new JPanel();
settingsPanel.setBackground(Color.WHITE);
settingsPanel.add(buttons[2]);
settingsPanel.add(buttons[3]);
settingsPanel.add(buttons[4]);
JPanel control = new JPanel();
control.setBackground(Color.WHITE);
scoreLabel = new JLabel();
control.add(scoreLabel);
control.add(buttons[0]);
control.add(buttons[1]);
add(settingsPanel, BorderLayout.NORTH);
add(control, BorderLayout.SOUTH);
pack();
setVisible(true);
}
我应该在 GameController 类以及 GameView 中创建 JButton 实例吗?
最佳答案
这个条件永远不可能满足
} else if (clicked.getText().equals("Reset")){
reset();
if (clicked.getText().equals("Redo")) {
如果第一个 if
语句为 true
,则第二个语句永远不可能为 true
关于java - 重置按钮java,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43037325/