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ItEr22S12CUVistaRecursosTempoPorProxectoItEr21S07: Handling listeners using WeakReferencedListeners.

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This commit is contained in:
Óscar González Fernández 2009-08-18 12:26:56 +02:00
parent ffa7f5ae3a
commit af71c91c39
1 changed files with 14 additions and 18 deletions
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32
ganttzk/src/main/java/org/zkoss/ganttz/TimeTrackerComponent.java
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@ -1,12 +1,10 @@
package org.zkoss.ganttz;
import java.lang.ref.WeakReference;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import org.zkoss.ganttz.util.Interval;
import org.zkoss.ganttz.util.WeakReferencedListeners;
import org.zkoss.ganttz.util.WeakReferencedListeners.IListenerNotification;
import org.zkoss.ganttz.util.zoom.IZoomLevelChangedListener;
import org.zkoss.ganttz.util.zoom.TimeTrackerState;
import org.zkoss.ganttz.util.zoom.ZoomLevel;
@ -25,7 +23,8 @@ public class TimeTrackerComponent extends HtmlMacroComponent {
.year(2012));
}
private List<WeakReference<IZoomLevelChangedListener>> zoomListeners = new LinkedList<WeakReference<IZoomLevelChangedListener>>();
private WeakReferencedListeners<IZoomLevelChangedListener> zoomListeners = WeakReferencedListeners
.create();
private IDatesMapper datesMapper = null;
@ -51,8 +50,7 @@ public class TimeTrackerComponent extends HtmlMacroComponent {
}
public void addZoomListener(IZoomLevelChangedListener listener) {
zoomListeners
.add(new WeakReference<IZoomLevelChangedListener>(listener));
zoomListeners.addListener(listener);
}
public void scrollHorizontalPercentage(int displacement) {
@ -60,17 +58,15 @@ public class TimeTrackerComponent extends HtmlMacroComponent {
"scroll_horizontal", "" + displacement));
}
private void fireZoomChanged(ZoomLevel detailLevel) {
ListIterator<WeakReference<IZoomLevelChangedListener>> listIterator = zoomListeners
.listIterator();
while (listIterator.hasNext()) {
IZoomLevelChangedListener listener = listIterator.next().get();
if (listener == null) {
listIterator.remove();
} else {
listener.zoomLevelChanged(detailLevel);
}
}
private void fireZoomChanged(final ZoomLevel detailLevel) {
zoomListeners
.fireEvent(new IListenerNotification<IZoomLevelChangedListener>() {
@Override
public void doNotify(IZoomLevelChangedListener listener) {
listener.zoomLevelChanged(detailLevel);
}
});
}
public Collection<TimeTrackerState.DetailItem> getDetailsFirstLevel() {