com.darwinsys.swingui.ExclusiveEnableGroup Maven / Gradle / Ivy
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Ian Darwin's assorted Java stuff,
assembled as an API.
package com.darwinsys.swingui;
import java.awt.Component;
import java.util.ArrayList;
import java.util.List;
/**
* Manage the "enabled" property on a group of Components,
* such that only one will be enabled.
* May malfunction if you directly invoke setEnabled() on any component.
* NOT THREADSAFE; use single-threadedly.
*/
public class ExclusiveEnableGroup implements java.io.Serializable {
private List groupComps = new ArrayList();
/** Add the Component to the list of managed Components
* @param c The component to be added
*/
public void add(Component c) {
c.setEnabled(false);
groupComps.add(c);
}
/** Enable the given Component; this is the only way you
* should control enabled properties on the components.
* @param targetComp The component to be enabled
*/
public void enable(Component targetComp) {
if (!groupComps.contains(targetComp)) {
throw new IllegalArgumentException(targetComp + " not in list");
}
// Walk the list once, disabling all but the target,
// and enabling the target.
for (Component c : groupComps) {
targetComp.setEnabled(c == targetComp);
}
}
}