Java 从JFrame修改独立的JPanel
我有一个JFrame和两个独立的JPanel。其中一个jpanel用JButtons填充,而另一个有两个文本字段。我通过JFrame将鼠标侦听器添加到按钮中,我希望这样,当从第一个JPanel触发事件时,第二个JPanel中的文本字段会发生更改。这两个面板有自己的类。我该怎么做呢Java 从JFrame修改独立的JPanel,java,swing,jframe,jpanel,Java,Swing,Jframe,Jpanel,我有一个JFrame和两个独立的JPanel。其中一个jpanel用JButtons填充,而另一个有两个文本字段。我通过JFrame将鼠标侦听器添加到按钮中,我希望这样,当从第一个JPanel触发事件时,第二个JPanel中的文本字段会发生更改。这两个面板有自己的类。我该怎么做呢 使用MVC,模型视图控制,分离关注点 让保存侦听器的控件更改模型的状态 视图(您的GUI)由控件向其添加侦听器,以便将用户输入传输到控件,从而传输到模型 视图还可以直接将侦听器添加到模型中,以便在模型更改时可以更改其显
编辑
例如:
import java.awt.GridLayout;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.AbstractAction;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.event.SwingPropertyChangeSupport;
public class MvcMain {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
MvcView view = new MvcView();
MvcModel model = new MvcModel();
MvcControl control = new MvcControl(view, model);
view.createAndDisplay();
}
});
}
}
class MvcView {
private MvcModel model;
private ButtonPanel buttonPanel = new ButtonPanel();
private TextFieldPanel textFieldPanel = new TextFieldPanel();
private JPanel mainPanel = new JPanel();
public MvcModel getModel() {
return model;
}
public ButtonPanel getButtonPanel() {
return buttonPanel;
}
public TextFieldPanel getTextFieldPanel() {
return textFieldPanel;
}
public MvcView() {
mainPanel.setLayout(new GridLayout(0, 1));
mainPanel.add(textFieldPanel);
mainPanel.add(buttonPanel);
}
public void setModel(MvcModel model) {
this.model = model;
model.addPropertyChangeListener(new ModelListener());
}
public void createAndDisplay() {
JFrame frame = new JFrame("MVC Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(mainPanel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private class ModelListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (ButtonTitle.class.getCanonicalName().equals(evt.getPropertyName())) {
ButtonTitle newValue = model.getButtonTitle();
textFieldPanel.textFieldSetText(newValue.getTitle());
}
}
}
}
enum ButtonTitle {
START("Start"), STOP("Stop"), PAUSE("Pause");
private String title;
private ButtonTitle(String title) {
this.title = title;
}
public String getTitle() {
return title;
}
}
@SuppressWarnings("serial")
class ButtonPanel extends JPanel {
public ButtonPanel() {
setBorder(BorderFactory.createTitledBorder("Button Panel"));
setLayout(new GridLayout(1, 0, 5, 0));
for (ButtonTitle btnTitle : ButtonTitle.values()) {
add(new JButton(new ButtonAction(btnTitle)));
}
}
private class ButtonAction extends AbstractAction {
private ButtonTitle btnTitle;
public ButtonAction(ButtonTitle btnTitle) {
super(btnTitle.getTitle());
this.btnTitle = btnTitle;
}
public void actionPerformed(java.awt.event.ActionEvent e) {
Object oldValue = null;
ButtonTitle newValue = btnTitle;
ButtonPanel.this.firePropertyChange(
ButtonTitle.class.getCanonicalName(), oldValue, newValue);
};
}
}
@SuppressWarnings("serial")
class TextFieldPanel extends JPanel {
private JTextField textField = new JTextField(15);
public TextFieldPanel() {
setBorder(BorderFactory.createTitledBorder("TextField Panel"));
add(textField);
}
public void textFieldSetText(String text) {
textField.setText(text);
}
}
class MvcControl {
private MvcView view;
private MvcModel model;
public MvcControl(MvcView view, MvcModel model) {
this.view = view;
this.model = model;
view.setModel(model);
view.getButtonPanel().addPropertyChangeListener(new ButtonPanelListener());
}
private class ButtonPanelListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (ButtonTitle.class.getCanonicalName().equals(evt.getPropertyName())) {
ButtonTitle newValue = (ButtonTitle) evt.getNewValue();
model.setButtonTitle(newValue);
}
}
}
}
class MvcModel {
private ButtonTitle buttonTitle;
private SwingPropertyChangeSupport pcSupport = new SwingPropertyChangeSupport(
this);
public void addPropertyChangeListener(PropertyChangeListener listener) {
pcSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
pcSupport.removePropertyChangeListener(listener);
}
public ButtonTitle getButtonTitle() {
return buttonTitle;
}
public void setButtonTitle(ButtonTitle buttonTitle) {
ButtonTitle oldValue = this.buttonTitle;
ButtonTitle newValue = buttonTitle;
this.buttonTitle = buttonTitle;
pcSupport.firePropertyChange(ButtonTitle.class.getCanonicalName(),
oldValue, newValue);
}
}
该示例缺少使用接口,这将允许进一步分离关注点,从而导致更松散的耦合(一件好事)
编辑
例如:
import java.awt.GridLayout;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.AbstractAction;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.event.SwingPropertyChangeSupport;
public class MvcMain {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
MvcView view = new MvcView();
MvcModel model = new MvcModel();
MvcControl control = new MvcControl(view, model);
view.createAndDisplay();
}
});
}
}
class MvcView {
private MvcModel model;
private ButtonPanel buttonPanel = new ButtonPanel();
private TextFieldPanel textFieldPanel = new TextFieldPanel();
private JPanel mainPanel = new JPanel();
public MvcModel getModel() {
return model;
}
public ButtonPanel getButtonPanel() {
return buttonPanel;
}
public TextFieldPanel getTextFieldPanel() {
return textFieldPanel;
}
public MvcView() {
mainPanel.setLayout(new GridLayout(0, 1));
mainPanel.add(textFieldPanel);
mainPanel.add(buttonPanel);
}
public void setModel(MvcModel model) {
this.model = model;
model.addPropertyChangeListener(new ModelListener());
}
public void createAndDisplay() {
JFrame frame = new JFrame("MVC Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(mainPanel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private class ModelListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (ButtonTitle.class.getCanonicalName().equals(evt.getPropertyName())) {
ButtonTitle newValue = model.getButtonTitle();
textFieldPanel.textFieldSetText(newValue.getTitle());
}
}
}
}
enum ButtonTitle {
START("Start"), STOP("Stop"), PAUSE("Pause");
private String title;
private ButtonTitle(String title) {
this.title = title;
}
public String getTitle() {
return title;
}
}
@SuppressWarnings("serial")
class ButtonPanel extends JPanel {
public ButtonPanel() {
setBorder(BorderFactory.createTitledBorder("Button Panel"));
setLayout(new GridLayout(1, 0, 5, 0));
for (ButtonTitle btnTitle : ButtonTitle.values()) {
add(new JButton(new ButtonAction(btnTitle)));
}
}
private class ButtonAction extends AbstractAction {
private ButtonTitle btnTitle;
public ButtonAction(ButtonTitle btnTitle) {
super(btnTitle.getTitle());
this.btnTitle = btnTitle;
}
public void actionPerformed(java.awt.event.ActionEvent e) {
Object oldValue = null;
ButtonTitle newValue = btnTitle;
ButtonPanel.this.firePropertyChange(
ButtonTitle.class.getCanonicalName(), oldValue, newValue);
};
}
}
@SuppressWarnings("serial")
class TextFieldPanel extends JPanel {
private JTextField textField = new JTextField(15);
public TextFieldPanel() {
setBorder(BorderFactory.createTitledBorder("TextField Panel"));
add(textField);
}
public void textFieldSetText(String text) {
textField.setText(text);
}
}
class MvcControl {
private MvcView view;
private MvcModel model;
public MvcControl(MvcView view, MvcModel model) {
this.view = view;
this.model = model;
view.setModel(model);
view.getButtonPanel().addPropertyChangeListener(new ButtonPanelListener());
}
private class ButtonPanelListener implements PropertyChangeListener {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (ButtonTitle.class.getCanonicalName().equals(evt.getPropertyName())) {
ButtonTitle newValue = (ButtonTitle) evt.getNewValue();
model.setButtonTitle(newValue);
}
}
}
}
class MvcModel {
private ButtonTitle buttonTitle;
private SwingPropertyChangeSupport pcSupport = new SwingPropertyChangeSupport(
this);
public void addPropertyChangeListener(PropertyChangeListener listener) {
pcSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
pcSupport.removePropertyChangeListener(listener);
}
public ButtonTitle getButtonTitle() {
return buttonTitle;
}
public void setButtonTitle(ButtonTitle buttonTitle) {
ButtonTitle oldValue = this.buttonTitle;
ButtonTitle newValue = buttonTitle;
this.buttonTitle = buttonTitle;
pcSupport.firePropertyChange(ButtonTitle.class.getCanonicalName(),
oldValue, newValue);
}
}
该示例缺少接口的使用,接口允许进一步分离关注点,从而导致松散的耦合(一件好事)。清晰简洁,示例如下。谢谢大家!@西尔弗:不客气。请注意,我不是专业人士,因此这可能是一个很糟糕的例子。+1然后…但是顺便说一下,有很多MVC版本,有时模型作为swing组件从视图中是不可见的are@nachokk:是的,但是它将被控件观察到,这就是为什么我将“间接”位放在上面的原因。清晰简洁,带有示例。谢谢大家!@西尔弗:不客气。请注意,我不是专业人士,因此这可能是一个很糟糕的例子。+1然后…但是顺便说一下,有很多MVC版本,有时模型作为swing组件从视图中是不可见的are@nachokk:是的,但是控件将观察到它,这就是我将“间接”位置于上方的原因。