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我正在製作一個帶有擺動的圖形程序，它涉及在框架上放置各種帶有組件的面板。其中之一是帶有按鈕的面板，當選擇選項菜單中的選項時，會完全用具有不同按鈕的不同按鈕替換。我們一直在思考，似乎最好的方法是每次選擇該選項時重新構建框架。正在尋找命令來替換另一個面板
這是代碼中，我建立了主面板中的片段：
import java.awt.Color;
import java.awt.Dimension;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.BorderFactory;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
import com.jtattoo.plaf.graphite.GraphiteLookAndFeel;
import com.nacher.calc.Main;
import com.nacher.calc.controller.Controller;
import net.miginfocom.swing.MigLayout;
/**
*
* @author chema && Sergio
* This Panel contains buttons and textbox to perform the calculator actions
*/
public class PanelCalculator extends JPanel implements PropertyChangeListener {
private static final long serialVersionUID = -8377215712645516042L;
private PanelNumbers panelNumbers;
private PanelScreen panelScreen;
private PanelOptions panelOptions;
private PanelScientific panelScientific;
public Controller controller;
public PanelCalculator(Controller controller) {
this.controller = controller;
//Initialize JTattoo Library
try{
UIManager.setLookAndFeel(new GraphiteLookAndFeel());
}catch(UnsupportedLookAndFeelException ulafe){
System.out.println("JTattoo Graphite failed to set");
}
this.setLayout(new MigLayout("wrap"));
buildComponents();
situateComponents();
//controller = new Controller();
controller.addPropertyChangeListener(panelScreen);//panelScreen escucha al controller
panelOptions.addPropertyChangeListener(controller);//controller escucha al panelOptions
panelNumbers.addPropertyChangeListener(controller);//controller escucha al panelNumbers
panelScreen.addPropertyChangeListener(controller);//controller escucha al panelScreen
}
private void buildComponents(){
this.setPreferredSize(new Dimension(210, 280));
this.setBorder(new EmptyBorder(0, 0, 0, 0));
panelOptions = new PanelOptions();
panelOptions.setBorder(new EmptyBorder(0, 0, 0, 0));
panelOptions.setPreferredSize(new Dimension(200, 50));
panelScreen = new PanelScreen();
panelScreen.setBorder(BorderFactory.createEtchedBorder());
panelScreen.setPreferredSize(new Dimension(200, 40));
panelScreen.setBackground(new Color(255, 255, 255));
panelNumbers = new PanelNumbers();
panelNumbers.setBorder(new EmptyBorder(0, 0, 0, 0));
panelNumbers.setPreferredSize(new Dimension(200, 185));
panelOptions.addPropertyChangeListener(panelScreen);//panelScreen escucha al panelOptions
panelNumbers.addPropertyChangeListener(panelScreen);//panelScreen escucha al panelNumbers
}
private void situateComponents(){
this.add(panelOptions, "span");
this.add(panelScreen, "span");
this.add(panelNumbers, "span");
}
/**
* To build the Scientific Calculator
*/
private void buildScientific() {
//Instantiate the panelScientific
panelScientific = new PanelScientific();
panelScientific.setBorder(new EmptyBorder(0, 0, 0, 0));
panelScientific.setPreferredSize(new Dimension(200, 185));
//Reordering the Panel Calculator
}
@Override
public void propertyChange(PropertyChangeEvent evt) {
String c = evt.getPropertyName();
if (c.equals(Constants.SET_CALC_SCIENTIFIC)) {
System.out.println("Set the Scientific Calculator");
buildScientific();
}
}
}
而這正是我們所建立的框架主類：
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import com.jtattoo.plaf.bernstein.BernsteinLookAndFeel;
import com.jtattoo.plaf.fast.FastLookAndFeel;
import com.jtattoo.plaf.graphite.GraphiteLookAndFeel;
import com.jtattoo.plaf.hifi.HiFiLookAndFeel;
import com.jtattoo.plaf.luna.LunaLookAndFeel;
import com.nacher.calc.controller.Controller;
import com.nacher.calc.ui.Constants;
import com.nacher.calc.ui.ImageConstants;
import com.nacher.calc.ui.PanelCalculator;
public class Main extends JFrame implements PropertyChangeListener {
private static final long serialVersionUID = -4136829057174783241L;
private static Main mySelf;
private static PanelCalculator panelCalc;
public static Controller controller;
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
controller = new Controller();
panelCalc = new PanelCalculator(controller);
controller.addPropertyChangeListener(panelCalc);
mySelf = new Main();
try {
mySelf.setTitle("Calculator");
mySelf.setLocationRelativeTo(null);
mySelf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mySelf.setIconImage(new ImageIcon(mySelf.getClass().getResource(ImageConstants.CALC_IMAGE_THREE)).getImage());
mySelf.getContentPane().add(panelCalc);
mySelf.setResizable(false);
mySelf.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e) {
System.out.println("Quitting the application.");
}
});
mySelf.pack();
mySelf.setVisible(true);
controller.addPropertyChangeListener(mySelf);
}catch(Exception ex) {
System.out.println("The application could not run.");
System.out.println(ex.getMessage());
System.exit(-1);
}
}
什麼命令我應該用'unbuild'框架，然後從頭重建它？有沒有更有效的方法來替換一個面板與另一個？