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Merge "Issue #2079 add dispose method to ModeListener" into development

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Lee Venable 2013-06-17 11:19:34 -05:00 • committed by Gerrit Code Review
commit d6c1b38c30
1 changed files with 20 additions and 0 deletions
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20
cave/com.raytheon.viz.ui/src/com/raytheon/viz/ui/dialogs/ModeListener.java
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@ -20,6 +20,8 @@
package com.raytheon.viz.ui.dialogs;
import java.lang.ref.WeakReference;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.PaintEvent;
@ -49,6 +51,7 @@ import com.raytheon.viz.core.mode.CAVEMode;
* Date Ticket# Engineer Description
* ---------- ---------- ----------- --------------------------
* 12/20/07 561 Dan Fitch Initial Creation.
* 6/7/2013 mnash Implementation for Chris Golden to allow instances to be garbage collected.
* </pre>
*
* @author Dan Fitch
@ -65,10 +68,27 @@ public class ModeListener implements PaintListener {
DEFAULT_SWT_FORE = disp.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND);
}
private WeakReference<Composite> comp;
public ModeListener(Composite comp) {
this.comp = new WeakReference<Composite>(comp);
comp.addPaintListener(this);
}
/**
* Dispose of this mode listener.
*/
public void dispose() {
// If the composite is still reachable and it has not
// been disposed, remove this listener; then delete
// the reference.
Composite comp = this.comp.get();
if ((comp != null) && (comp.isDisposed() == false)) {
comp.removePaintListener(this);
}
this.comp = null;
}
@Override
public void paintControl(PaintEvent paintevent) {
Color bgColor = CAVEMode.getBackgroundColor();