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index.zulzul<zk>
<html>
Testing instructions:
<ol>
<li>Click 'Select All' button.</li>
<li>Scroll the listbox up and down a few times.</li>
</ol>
Expected results:
<ul>
<li>The scrollbar position should not vibrate when released.</li>
</ul>
</html>
<window apply="pkg$.B65_ZK_1483">
<listbox id="listbox" width="100%" rows="10">
<listhead>
<listheader label="Label" sort="auto" />
</listhead>
</listbox>
<button id="btnSelectAll" label="Select All" />
</window>
</zk>B65_ZK_1483.javajava
import java.util.ArrayList;
import java.util.List;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zk.ui.select.SelectorComposer;
import org.zkoss.zk.ui.select.annotation.Listen;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zul.ListModelList;
import org.zkoss.zul.Listbox;
import org.zkoss.zul.Listitem;
import org.zkoss.zul.ListitemRenderer;
import org.zkoss.zul.Window;
/**
* Bug ZK-1483: Jumpy scrollbar for listbox with rod when items are selected
* @link http://tracker.zkoss.org/browse/ZK-1483
*/
public class B65_ZK_1483 extends SelectorComposer<Window> {
@Wire
private Listbox listbox;
private List<String> elements = getRandomDummyElements(1000);
private ListModelList<String> lmdList;
public final void doAfterCompose(Window comp) throws Exception {
super.doAfterCompose(comp);
lmdList = new ListModelList<String>(elements);
listbox.setModel(lmdList);
listbox.setItemRenderer(new ListitemRenderer<String>() {
public void render(Listitem item, String data, int index) throws Exception {
item.setLabel(data);
}
});
listbox.setMultiple(true);
listbox.setCheckmark(true);
listbox.setAttribute("org.zkoss.zul.listbox.rod", true);
}
private static final List<String> getRandomDummyElements(int nbItems) {
List<String> dummys = new ArrayList<String>(nbItems);
for (int i = 0; i < nbItems; i++) {
dummys.add(String.format("%4d: %s", i, randomAlphabetic(15)));
}
return dummys;
}
private static final String randomAlphabetic(int length) {
StringBuilder sb = new StringBuilder(length);
for (int i=0; i < length; i++) {
sb.append((char) ('A' + (int) (('Z'-'A') * Math.random())));
}
return sb.toString();
}
@Listen(Events.ON_CLICK + " = #btnSelectAll")
public void handlerSelectAllListBox(Event evt) {
lmdList.clearSelection();
lmdList.setSelection(elements);
}
}