в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

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2010-05-31T15:18:27Z

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== Adding an InputMap to a Component ==



<source lang="java">
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.KeyStroke;
public class Main {
public static void main(String[] argv) throws Exception {
InputMap inputMap = new InputMap();
inputMap.put(KeyStroke.getKeyStroke("F2"), "actionName");
JButton component = new JButton("button");

inputMap.setParent(component.getInputMap(JComponent.WHEN_FOCUSED));
component.setInputMap(JComponent.WHEN_FOCUSED, inputMap);
}
}</source>



== Disable a character so that no action is invoked ==



<source lang="java">
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
public class Main {
public static void main(String[] argv) {
JTextField component = new JTextField(10);

component.getInputMap(JComponent.WHEN_FOCUSED).put(
KeyStroke.getKeyStroke("typed X"), "none");

JFrame f = new JFrame();
f.add(component);
f.setSize(300, 300);
f.setVisible(true);
}
}</source>



== InputMap javax.swing.JComponent.getInputMap(int condition) ==



<source lang="java">
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.KeyStroke;
public class Main {
public static void main(String[] argv) throws Exception {
JButton component = new JButton();
MyAction action = new MyAction();
component.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("F2"),
action.getValue(Action.NAME));
}
}
class MyAction extends AbstractAction {
public MyAction() {
super("my action");
}
public void actionPerformed(ActionEvent e) {
System.out.println("hi");
}
}</source>



== Install your own action to text component ==



<source lang="java">
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.text.BadLocationException;
import javax.swing.text.JTextComponent;
class InsertAction extends AbstractAction {
public InsertAction() {
super("Insert Space");
}
public void actionPerformed(ActionEvent evt) {
JTextComponent c = (JTextComponent) evt.getSource();
try {
c.getDocument().insertString(c.getCaretPosition(), " space", null);
} catch (BadLocationException e) {
}
}
}
public class Main {
public static void main(String[] argv) {
JTextField component = new JTextField(10);
InsertAction insertSpaceAction = new InsertAction();
component.getInputMap(JComponent.WHEN_FOCUSED).put(
KeyStroke.getKeyStroke(new Character(" "), 0), "none");
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("pressed SPACE"),
insertSpaceAction.getValue(Action.NAME));
component.getActionMap().put(insertSpaceAction.getValue(Action.NAME), insertSpaceAction);
JFrame f = new JFrame();
f.add(component);
f.setSize(300, 300);
f.setVisible(true);
}
}</source>



== Modify a component: press space bar or F2 to move focus to next focusable component. ==



<source lang="java">
import java.awt.ruponent;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.KeyStroke;
public class Main {
public static void main(String[] argv) {
JButton component = new JButton();
NextFocusAction nextFocusAction = new NextFocusAction();
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("SPACE"),
nextFocusAction.getValue(Action.NAME));
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("F2"),
nextFocusAction.getValue(Action.NAME));
component.getActionMap().put(nextFocusAction.getValue(Action.NAME), nextFocusAction);

}
}
class NextFocusAction extends AbstractAction {
public NextFocusAction() {
super("Move Focus Forwards");
}
public void actionPerformed(ActionEvent evt) {
((Component) evt.getSource()).transferFocus();
}
}</source>



== Overriding Default Typed Key Bindings in a JTextComponent ==



<source lang="java">
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
public class Main {
public static void main(String[] argv) {
JTextField component = new JTextField(10);
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("typed a"),
"actionName");
JFrame f = new JFrame();
f.add(component);
f.setSize(300, 300);
f.setVisible(true);
}
}</source>



== Press shift space or shift F2 to move the focus to the previous focusable component. ==



<source lang="java">
import java.awt.ruponent;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.KeyStroke;
public class Main {
public static void main(String[] argv) {
JButton component = new JButton();
PrevFocusAction prevFocusAction = new PrevFocusAction();
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("shift F2"),
prevFocusAction.getValue(Action.NAME));
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("shift SPACE"),
prevFocusAction.getValue(Action.NAME));
component.getActionMap().put(prevFocusAction.getValue(Action.NAME), prevFocusAction);
}
}
class PrevFocusAction extends AbstractAction {
PrevFocusAction() {
super("Move Focus Backwards");
}
public void actionPerformed(ActionEvent evt) {
((Component) evt.getSource()).transferFocusBackward();
}
}</source>



== Prevent the space from being inserted when shift-space is pressed ==



<source lang="java">
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
public class Main {
public static void main(String[] argv) {
JTextField component = new JTextField(10);
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke(new Character(" "), 0), "none");
JFrame f = new JFrame();
f.add(component);
f.setSize(300, 300);
f.setVisible(true);
}
}</source>



== Sharing an InputMap or an ActionMap Between Two Components ==



<source lang="java">
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.text.JTextComponent;
public class Main {
public static void main(String[] argv) {
InputMap im = new JTextArea().getInputMap(JComponent.WHEN_FOCUSED);
im.put(KeyStroke.getKeyStroke("F2"), "actionName");
ActionMap am = new JTextArea().getActionMap();
am.put("actionName", new AbstractAction("actionName") {
public void actionPerformed(ActionEvent evt) {
System.out.println((JTextComponent) evt.getSource());
}
});
im.put(KeyStroke.getKeyStroke("F3"), "actionName2");
am.put("actionName2", new AbstractAction("actionName2") {
public void actionPerformed(ActionEvent evt) {
System.out.println((JTextComponent) evt.getSource());
}
});
JButton component1 = new JButton("button 1");
JButton component2 = new JButton("button 2");
component1.setInputMap(JComponent.WHEN_FOCUSED, im);
component2.setInputMap(JComponent.WHEN_FOCUSED, im);
component1.setActionMap(am);
component2.setActionMap(am);

}
}</source>



== void InputMap.put(KeyStroke keyStroke, Object actionMapKey) ==



<source lang="java">
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.KeyStroke;
public class Main {
public static void main(String[] argv) throws Exception {
JButton component = new JButton();
MyAction action = new MyAction();
component.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("F2"),
action.getValue(Action.NAME));
}
}
class MyAction extends AbstractAction {
public MyAction() {
super("my action");
}
public void actionPerformed(ActionEvent e) {
System.out.println("hi");
}
}</source>

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Admin: 1 версия