Question

我想通过选择一个来改变2个Jbuttons的图标，然后选择下一个来交换它们的图标。喜欢糖果粉碎或宝石迷阵的东西。我想用动作监听器来完成这个，我该怎么做呢？

这是我的计划的gui：

public class UI implements Runnable {

private JFrame _frame;
private Model _model;
private ArrayList<JButton> _tiles;

public void run() {
    _model = new Model();
    _frame = new JFrame();
    _frame.setLayout(new GridLayout(5,5));

    _tiles = new ArrayList<JButton>();
    for (int i=0; i<25; i++) {
        JButton tile = new JButton();
        tile.setBackground(Color.white);
    //this just pick out random icon file from a folder
        tile.setIcon(_model.randomIcon()); 
        tile.addActionListener(new ButtonBorderHandler(_model,tile));
    //this is the actionlistener that i want to implement the swap on
        tile.addActionListener(new ButtonSwapHandler();
        _tiles.add(tile);
    }

我试过这样做

public class ButtonSwapHandler implements ActionListener{

JButton _button1;
JButton _button2;
Model _model;
UI _ui;

public ButtonSwapHandler(UI u,Model m, JButton b1, JButton b2){
    _model=m;
    _button1=b1;
    _button2=b2;
    _ui =u;
}

@Override
public void actionPerformed(ActionEvent e) {

//this line should give me the position of the first button i press
    int i = _ui.getTiles().indexOf(e.getSource());

//this is the part where i dont know how to keep going
//i want to know where is the 2nd button that i clicked
    int j = _ui.getTiles().indexOf(e.

// this is the method i wrote to make the swap
// it just the Collections.swap(tile,positionOfButton1,postionOfButton2)
    _model.swap(ui._tile,i,j);
}

Answer 1

你的逻辑不太清晰。您正在创建一个5x5网格，您可以在其中填充按钮。

例如：

0  1  2  3  4
5  6  7  8  9
10 11 12 13 14
15 16 17 18 19
20 21 22 23 24

但是，当您点击按钮时，如何确保交换方向？比如说，如果用户点击按钮7，应该选择7的相邻按钮进行交换？

所以，你的逻辑中缺少的是方向。

例如：

如果交换始终发生在左侧立即按钮，您可以像indexOf(selectedButton)-1一样计算交换按钮。同样，只有当该二维网格中的那行具有立即左键时，交换才可能在条件基础上发生。

<强>更新

如果操作只在单击两个按钮后发生，那么您需要再创建一个类，它实际上跟踪点击的按钮数量，然后在count == 2时交换。

以下是一个修改过的示例：

public class ButtonClicksCounter {
    static ArrayList<JButton> _buttonsClicked = new ArrayList<JButton>();
    public static void addButton(JButton btn) {
        _buttonsClicked.add(btn);
    }

    public static int getButtonClicksCount() {
        return _buttonsClicked.size();
    }

    public static void clearButtonClicksCount() {
        _buttonsClicked.clear();
    }

    public ArrayList<JButton> getButtonsClicked() {
        return _buttonsClicked;
    }

}

public class ButtonSwapHandler implements ActionListener{


JButton _button;
Model _model;
UI _ui;

public ButtonSwapHandler(UI u, Model m, JButton b1){
    _model=m;
    _button=b1;
    _ui =u;
}

@Override
public void actionPerformed(ActionEvent e) {
   //Add the button
   ButtonClicksCounter.addButton((JButton)e.getSource());

   //Check if count==2
   if(ButtonClicksCounter.getButtonClicksCount()==2) {
      ArrayList<JButton> buttonsToSwap = ButtonClicksCounter.getButtonsClicked();

      //Get positions
      int i = _ui.getTiles().indexOf(buttonsToSwap[0]);
      int j = _ui.getTiles().indexOf(buttonsToSwap[1]);

      //Swap
      _model.swap(ui._tile,i,j);

      //Clear selection
      ButtonClicksCounter.clearButtonClicksCount();
   }

}

交换2个jbutton

1 个答案: