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<TITLE>Sharing an InputMap or an ActionMap Between Two Components
(Java Developers Almanac Example)
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<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
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<B><A HREF="../javax.swing/pkg.html#Keystrokes%20and%20Input%20Maps">Keystrokes and Input Maps</A></B><font color="#666666" SIZE="-2">
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<h3>
e860.
Sharing an InputMap or an ActionMap Between Two Components</h3>
By sharing an <code>InputMap</code> or <code>ActionMap</code>, any change to the
shared <code>InputMap</code> or <code>ActionMap</code> will affect all components
sharing the <code>InputMap</code> or <code>ActionMap</code>.
<code>WHEN_FOCUSED</code> and <code>WHEN_ANCESTOR_OF_FOCUSED_COMPONENT</code> types of
<code>InputMap</code>s can be shared. <code>WHEN_IN_FOCUSED_WINDOW</code>
<code>InputMap</code>s cannot be shared.
<pre>
// Get an InputMap from the desired type of component and initialize it
InputMap im = new JTextArea().getInputMap(JComponent.<font color="#0066ff"><i>WHEN_FOCUSED</i></font>);
im.put(KeyStroke.getKeyStroke(<font color="#0066ff"><i>"F2"</i></font>), <font color="#0066ff"><i>"actionName"</i></font>);
// Get an ActionMap from the desired type of component and initialize it
ActionMap am = new JTextArea().getActionMap();
am.put(<font color="#0066ff"><i>"actionName"</i></font>,
new AbstractAction(<font color="#0066ff"><i>"actionName"</i></font>) {
public void actionPerformed(ActionEvent evt) {
<font color="#0066ff"><i>process</i></font>((JTextComponent)evt.getSource());
}
}
);
// Use the shared InputMap and ActionMap
<font color="#0066ff"><i>component1</i></font>.setInputMap(JComponent.<font color="#0066ff"><i>WHEN_FOCUSED</i></font>, im);
<font color="#0066ff"><i>component2</i></font>.setInputMap(JComponent.<font color="#0066ff"><i>WHEN_FOCUSED</i></font>, im);
<font color="#0066ff"><i>component1</i></font>.setActionMap(am);
<font color="#0066ff"><i>component2</i></font>.setActionMap(am);
// Now, any change to the shared InputMap or ActionMap will affect both component1 and component2
im.put(KeyStroke.getKeyStroke(<font color="#0066ff"><i>"F3"</i></font>), <font color="#0066ff"><i>"actionName2"</i></font>);
am.put(<font color="#0066ff"><i>"actionName2"</i></font>,
new AbstractAction(<font color="#0066ff"><i>"actionName2"</i></font>) {
public void actionPerformed(ActionEvent evt) {
<font color="#0066ff"><i>process</i></font>((JTextComponent)evt.getSource());
}
}
);
</pre>
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Related Examples
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e857. <a class="eglink" href="KeyStrokes.html?l=rel">
Creating a KeyStroke and Binding It to an Action
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e858. <a class="eglink" href="Key2Str.html?l=rel">
Converting a KeyStroke to a String
</a>
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e859. <a class="eglink" href="ListKeyBinds.html?l=rel">
Listing the Key Bindings in a Component
</a>
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e861. <a class="eglink" href="FindKeyBind.html?l=rel">
Finding a Key Binding in a Component
</a>
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e862. <a class="eglink" href="ChangeInputMap.html?l=rel">
Adding an InputMap to a Component
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See also:
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Actions">
Actions
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JButton">
JButton
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JCheckBox">
JCheckBox
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JComboBox">
JComboBox
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JDesktop%20and%20JInternalFrame">
JDesktop and JInternalFrame
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JFrame,%20JWindow,%20JDialog">
JFrame, JWindow, JDialog
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JLabel">
JLabel
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JList">
JList
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JProgressBar">
JProgressBar
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JRadioButton">
JRadioButton
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JScrollPane">
JScrollPane
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JSlider">
JSlider
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JSpinner">
JSpinner
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JSplitPane">
JSplitPane
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JTabbedPane">
JTabbedPane
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JToolBar">
JToolBar
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Layout">
Layout
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Look and Feel
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Menus
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Progress%20Monitor">
Progress Monitor
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#The%20Screen">
The Screen
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Tool%20Tips">
Tool Tips
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#UI%20Default%20Values">
UI Default Values
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