Java by API/java.awt.event/ActionEvent
Содержание
ActionEvent.ALT_MASK
<source lang="java">
import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame();
Container contentPane = frame.getContentPane();
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Command: " + e.getActionCommand());
int modifiers = e.getModifiers();
System.out.println("\tALT : "
+ checkMod(modifiers, ActionEvent.ALT_MASK));
System.out.println("\tCTRL : "
+ checkMod(modifiers, ActionEvent.CTRL_MASK));
System.out.println("\tMETA : "
+ checkMod(modifiers, ActionEvent.META_MASK));
System.out.println("\tSHIFT: "
+ checkMod(modifiers, ActionEvent.SHIFT_MASK));
Object source = e.getSource();
if (source instanceof JComboBox) {
JComboBox jb = (JComboBox) source;
System.out.println("Combo: " + jb.getSelectedItem());
}
}
private boolean checkMod(int modifiers, int mask) {
return ((modifiers & mask) == mask);
}
};
String flavors[] = { "Item 1", "Item 2", "Item 3"};
JComboBox jc = new JComboBox(flavors);
jc.setMaximumRowCount(4);
jc.setEditable(true);
jc.addActionListener(listener);
contentPane.add(jc, BorderLayout.NORTH);
JButton b = new JButton("Button!");
b.addActionListener(listener);
contentPane.add(b, BorderLayout.CENTER);
JPanel panel = new JPanel();
JLabel label = new JLabel("Label 1: ");
JTextField text = new JTextField("Type your text", 15);
text.addActionListener(listener);
label.setDisplayedMnemonic(KeyEvent.VK_1);
label.setLabelFor(text);
panel.add(label);
panel.add(text);
contentPane.add(panel, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
}
</source>
ActionEvent.CTRL_MASK
<source lang="java">
import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame();
Container contentPane = frame.getContentPane();
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Command: " + e.getActionCommand());
int modifiers = e.getModifiers();
System.out.println("\tALT : "
+ checkMod(modifiers, ActionEvent.ALT_MASK));
System.out.println("\tCTRL : "
+ checkMod(modifiers, ActionEvent.CTRL_MASK));
System.out.println("\tMETA : "
+ checkMod(modifiers, ActionEvent.META_MASK));
System.out.println("\tSHIFT: "
+ checkMod(modifiers, ActionEvent.SHIFT_MASK));
Object source = e.getSource();
if (source instanceof JComboBox) {
JComboBox jb = (JComboBox) source;
System.out.println("Combo: " + jb.getSelectedItem());
}
}
private boolean checkMod(int modifiers, int mask) {
return ((modifiers & mask) == mask);
}
};
String flavors[] = { "Item 1", "Item 2", "Item 3"};
JComboBox jc = new JComboBox(flavors);
jc.setMaximumRowCount(4);
jc.setEditable(true);
jc.addActionListener(listener);
contentPane.add(jc, BorderLayout.NORTH);
JButton b = new JButton("Button!");
b.addActionListener(listener);
contentPane.add(b, BorderLayout.CENTER);
JPanel panel = new JPanel();
JLabel label = new JLabel("Label 1: ");
JTextField text = new JTextField("Type your text", 15);
text.addActionListener(listener);
label.setDisplayedMnemonic(KeyEvent.VK_1);
label.setLabelFor(text);
panel.add(label);
panel.add(text);
contentPane.add(panel, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
}
</source>
ActionEvent: getActionCommand()
<source lang="java">
import java.awt.BorderLayout; import java.awt.ItemSelectable; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JComboBox; import javax.swing.JFrame; public class MainClass {
public static void main(final String args[]) {
final String labels[] = { "A", "B", "C", "D", "E" };
JFrame frame = new JFrame("Selecting JComboBox");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComboBox comboBox = new JComboBox(labels);
frame.add(comboBox, BorderLayout.SOUTH);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
System.out.println("Command: " + actionEvent.getActionCommand());
ItemSelectable is = (ItemSelectable)actionEvent.getSource();
System.out.println(", Selected: " + selectedString(is));
}
};
comboBox.addActionListener(actionListener);
frame.setSize(400, 200);
frame.setVisible(true);
}
static private String selectedString(ItemSelectable is) {
Object selected[] = is.getSelectedObjects();
return ((selected.length == 0) ? "null" : (String)selected[0]);
}
}
</source>
ActionEvent: getModifiers()
<source lang="java">
import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame();
Container contentPane = frame.getContentPane();
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Command: " + e.getActionCommand());
int modifiers = e.getModifiers();
System.out.println("\tALT : "
+ checkMod(modifiers, ActionEvent.ALT_MASK));
System.out.println("\tCTRL : "
+ checkMod(modifiers, ActionEvent.CTRL_MASK));
System.out.println("\tMETA : "
+ checkMod(modifiers, ActionEvent.META_MASK));
System.out.println("\tSHIFT: "
+ checkMod(modifiers, ActionEvent.SHIFT_MASK));
Object source = e.getSource();
if (source instanceof JComboBox) {
JComboBox jb = (JComboBox) source;
System.out.println("Combo: " + jb.getSelectedItem());
}
}
private boolean checkMod(int modifiers, int mask) {
return ((modifiers & mask) == mask);
}
};
String flavors[] = { "Item 1", "Item 2", "Item 3"};
JComboBox jc = new JComboBox(flavors);
jc.setMaximumRowCount(4);
jc.setEditable(true);
jc.addActionListener(listener);
contentPane.add(jc, BorderLayout.NORTH);
JButton b = new JButton("Button!");
b.addActionListener(listener);
contentPane.add(b, BorderLayout.CENTER);
JPanel panel = new JPanel();
JLabel label = new JLabel("Label 1: ");
JTextField text = new JTextField("Type your text", 15);
text.addActionListener(listener);
label.setDisplayedMnemonic(KeyEvent.VK_1);
label.setLabelFor(text);
panel.add(label);
panel.add(text);
contentPane.add(panel, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
}
</source>
ActionEvent: getSource()
<source lang="java">
import java.awt.BorderLayout; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import java.util.Random; import javax.swing.JButton; import javax.swing.JFrame; public class MainClass {
public static void main(String args[]) {
JFrame frame = new JFrame("Button Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JButton button1 = new JButton("Select Me");
final JButton button2 = new JButton("No Select Me");
final Random random = new Random();
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
JButton button = (JButton) actionEvent.getSource();
int red = random.nextInt(255);
int green = random.nextInt(255);
int blue = random.nextInt(255);
button.setBackground(new Color(red, green, blue));
}
};
PropertyChangeListener propertyChangeListener = new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent propertyChangeEvent) {
String property = propertyChangeEvent.getPropertyName();
if ("background".equals(property)) {
button2.setBackground((Color) propertyChangeEvent.getNewValue());
}
}
};
button1.addActionListener(actionListener);
button1.addPropertyChangeListener(propertyChangeListener);
button2.addActionListener(actionListener);
frame.add(button1, BorderLayout.NORTH);
frame.add(button2, BorderLayout.SOUTH);
frame.setSize(300, 100);
frame.setVisible(true);
}
}
</source>
ActionEvent.META_MASK
<source lang="java">
import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame();
Container contentPane = frame.getContentPane();
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Command: " + e.getActionCommand());
int modifiers = e.getModifiers();
System.out.println("\tALT : "
+ checkMod(modifiers, ActionEvent.ALT_MASK));
System.out.println("\tCTRL : "
+ checkMod(modifiers, ActionEvent.CTRL_MASK));
System.out.println("\tMETA : "
+ checkMod(modifiers, ActionEvent.META_MASK));
System.out.println("\tSHIFT: "
+ checkMod(modifiers, ActionEvent.SHIFT_MASK));
Object source = e.getSource();
if (source instanceof JComboBox) {
JComboBox jb = (JComboBox) source;
System.out.println("Combo: " + jb.getSelectedItem());
}
}
private boolean checkMod(int modifiers, int mask) {
return ((modifiers & mask) == mask);
}
};
String flavors[] = { "Item 1", "Item 2", "Item 3"};
JComboBox jc = new JComboBox(flavors);
jc.setMaximumRowCount(4);
jc.setEditable(true);
jc.addActionListener(listener);
contentPane.add(jc, BorderLayout.NORTH);
JButton b = new JButton("Button!");
b.addActionListener(listener);
contentPane.add(b, BorderLayout.CENTER);
JPanel panel = new JPanel();
JLabel label = new JLabel("Label 1: ");
JTextField text = new JTextField("Type your text", 15);
text.addActionListener(listener);
label.setDisplayedMnemonic(KeyEvent.VK_1);
label.setLabelFor(text);
panel.add(label);
panel.add(text);
contentPane.add(panel, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
}
</source>
ActionEvent.SHIFT_MASK
<source lang="java">
import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame();
Container contentPane = frame.getContentPane();
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Command: " + e.getActionCommand());
int modifiers = e.getModifiers();
System.out.println("\tALT : "
+ checkMod(modifiers, ActionEvent.ALT_MASK));
System.out.println("\tCTRL : "
+ checkMod(modifiers, ActionEvent.CTRL_MASK));
System.out.println("\tMETA : "
+ checkMod(modifiers, ActionEvent.META_MASK));
System.out.println("\tSHIFT: "
+ checkMod(modifiers, ActionEvent.SHIFT_MASK));
Object source = e.getSource();
if (source instanceof JComboBox) {
JComboBox jb = (JComboBox) source;
System.out.println("Combo: " + jb.getSelectedItem());
}
}
private boolean checkMod(int modifiers, int mask) {
return ((modifiers & mask) == mask);
}
};
String flavors[] = { "Item 1", "Item 2", "Item 3"};
JComboBox jc = new JComboBox(flavors);
jc.setMaximumRowCount(4);
jc.setEditable(true);
jc.addActionListener(listener);
contentPane.add(jc, BorderLayout.NORTH);
JButton b = new JButton("Button!");
b.addActionListener(listener);
contentPane.add(b, BorderLayout.CENTER);
JPanel panel = new JPanel();
JLabel label = new JLabel("Label 1: ");
JTextField text = new JTextField("Type your text", 15);
text.addActionListener(listener);
label.setDisplayedMnemonic(KeyEvent.VK_1);
label.setLabelFor(text);
panel.add(label);
panel.add(text);
contentPane.add(panel, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
}
</source>
new ActionEvent(Object source, int id, String command)
<source lang="java">
import java.awt.BorderLayout; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.util.EventListener; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JTextField; import javax.swing.event.EventListenerList; public class MainClass {
public static void main(String args[]) {
JFrame frame = new JFrame("Key Text Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
KeyTextComponent keyTextComponent = new KeyTextComponent();
final JTextField textField = new JTextField();
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
String keyText = actionEvent.getActionCommand();
textField.setText(keyText);
}
};
keyTextComponent.addActionListener(actionListener);
frame.add(keyTextComponent, BorderLayout.CENTER);
frame.add(textField, BorderLayout.SOUTH);
frame.setSize(300, 200);
frame.setVisible(true);
}
} class KeyTextComponent extends JComponent {
private EventListenerList actionListenerList = new EventListenerList();
public KeyTextComponent() {
setBackground(Color.CYAN);
KeyListener internalKeyListener = new KeyAdapter() {
public void keyPressed(KeyEvent keyEvent) {
if (actionListenerList != null) {
int keyCode = keyEvent.getKeyCode();
String keyText = KeyEvent.getKeyText(keyCode);
ActionEvent actionEvent = new ActionEvent(this,
ActionEvent.ACTION_PERFORMED, keyText);
fireActionPerformed(actionEvent);
}
}
};
MouseListener internalMouseListener = new MouseAdapter() {
public void mousePressed(MouseEvent mouseEvent) {
requestFocusInWindow();
}
};
addKeyListener(internalKeyListener);
addMouseListener(internalMouseListener);
}
public void addActionListener(ActionListener actionListener) {
actionListenerList.add(ActionListener.class, actionListener);
}
public void removeActionListener(ActionListener actionListener) {
actionListenerList.remove(ActionListener.class, actionListener);
}
protected void fireActionPerformed(ActionEvent actionEvent) {
EventListener listenerList[] = actionListenerList
.getListeners(ActionListener.class);
for (int i = 0, n = listenerList.length; i < n; i++) {
((ActionListener) listenerList[i]).actionPerformed(actionEvent);
}
}
public boolean isFocusable() {
return true;
}
}
</source>
