我在弄清楚如何使用事件处理程序以在 2 个面板之间删除和重绘时遇到问题。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class PanelSwitcherView extends JFrame {
private JPanel panel1, panel2;
public PanelSwitcherView() {
super("Panel Switching Test");
Font font = new Font("SansSerif", Font.BOLD, 30);
panel1 = new JPanel();
panel1.setLayout(new GridLayout(2, 2, 5, 5));
font = new Font("Serif", Font.ITALIC, 30);
panel2 = new JPanel();
panel2.setLayout(new BorderLayout());
在这里我决定添加一个测试 ActionListener 但不确定是否正确使用
font = new Font("Monospaced", Font.BOLD + Font.ITALIC, 30);
JButton button = new JButton("Switch Panels");
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
System.out.print("Test");
PanelSwitcherModel.switchPanel(); // used to make value of whichpanel 1 or 2
}
});
button.setFont(font);
add(button, BorderLayout.NORTH);
add(panel1, BorderLayout.CENTER);
}
也不完全确定如何使用它
public void displayPanel(int whichPanel) {
remove(panel1);
remove(panel2);
if (whichPanel == 1) {
System.out.println("Should display panel1");
add(panel1, BorderLayout.CENTER);
} else {
System.out.println("Should display panel2");
add(panel2, BorderLayout.CENTER);
}
validate();
repaint();
}
我的控制器(下面的类)
public void register(PanelSwitcherController controller) {
}
问题主要出在这里,我是这里的新手,我是否以某种方式将我的 ActionListener 移到这里?如何访问其他类以将面板选项的数字从 1 更改为 2?
import java.awt.event.*;
public class PanelSwitcherController implements ActionListener{
public PanelSwitcherController(PanelSwitcherView view,
PanelSwitcherModel model) {
}
public void actionPerformed(ActionEvent e) {
}
}