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index.zulzul<zk>
<zscript>
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.Events;
public class CustomFisheye extends org.zkoss.zkex.zul.Fisheye {
public CustomFisheye () {
addClientEvent(CustomFisheye.class, Events.ON_FOCUS, CE_IMPORTANT|CE_REPEAT_IGNORE);
addClientEvent(CustomFisheye.class, Events.ON_BLUR, CE_IMPORTANT|CE_REPEAT_IGNORE);
}
public void service(org.zkoss.zk.au.AuRequest request, boolean everError) {
final String cmd = request.getCommand();
if ("onFocus".equals(cmd)) {
Events.postEvent(new Event("onFocus", this));
}
super.service(request, everError);
}
}
</zscript>
<script type="text/javascript">
/**
* make a component focusable and can handle onCtrlKey event
* by the given component's uuid
*/
function makeFocusable (uuid) {
var wgt = zk.Widget.$('#'+uuid);
overrideFunctions(wgt);
}
/**
* Override several functions to handle the focus/blur event
* and handle the onCtrlKey event
*/
function overrideFunctions (wgt) {
if (wgt) {
var oldClick = wgt.doClick_,
oldFocus = wgt.doFocus_,
oldBlur = wgt.doBlur_,
oldMouseDown = wgt.doMouseDown_;
wgt.doClick_ = function (evt) {
// the focusable anchor not exist, create it
if (!wgt.$n('custom-anchor')) {
createFocusableAnchor(wgt);
// rebind to enable added events
wgt.unbind().bind();
}
// focus the anchor if click on self to trigger the onFocus event
if (jq.isAncestor(wgt.$n(), evt.domTarget))
jq(wgt.$n('custom-anchor')).focus();
// do original function
oldClick.apply(wgt, arguments);
}
wgt.doFocus_ = function (evt) {
if (wgt._isFocused) return;
wgt._isFocused = true;
// do original function
oldFocus.apply(wgt, arguments);
// mantain focus status
if (evt.domTarget == wgt.$n('custom-anchor'))
wgt._focused = true;
wgt.fire('onFocus', {});
}
wgt.doBlur_ = function (evt) {
if (zkex.menu.Fisheye._preventBlur)
return;
wgt._isFocused = null;
// do original function
oldBlur.apply(wgt, arguments);
// mantain focus status
if (evt.domTarget == wgt.$n('custom-anchor'))
wgt._focused = false;
}
wgt.doMouseDown_ = function (evt) {
oldMouseDown.apply(wgt, arguments);
zkex.menu.Fisheye._preventBlur = true;
setTimeout (function () {
zkex.menu.Fisheye._preventBlur = null;
}, 0);
}
}
}
/**
* Create a focusable anchor to make the widget focusable
* and can handle the onCtrlKey event
*/
function createFocusableAnchor (wgt) {
if (wgt) {
// create an anchor that can receive the focus
var anchor = zk.ie || zk.gecko ? document.createElement("a") : document.createElement("button");
// make it focusable
anchor.href = 'javascript:;';
// make it catchable
anchor.id = wgt.uuid + '-custom-anchor';
// make it out of the screen
anchor.style.position = 'absolute';
anchor.style.left = '-3000px';
anchor.style.top = '-3000px';
// make it as a part of the div component
wgt.$n().appendChild(anchor);
// listen to event focus, blur and keydown
wgt.domListen_(anchor, 'onFocus', 'doFocus_')
.domListen_(anchor, 'onKeyDown', 'doKeyDown_')
.domListen_(anchor, 'onBlur', 'doBlur_');
}
}
</script>
<label id="lb" value=" Fish eye focused !" visible="false" />
<div height="450px">
<fisheyebar id="fsb" style="position:absolute;margin:80px 150px;"
attachEdge="top" itemWidth="80" itemHeight="80" itemMaxHeight="160" itemMaxWidth="160">
<fisheye onFocus="lb.setVisible(true);" onBlur="lb.setVisible(false);" use="CustomFisheye"
image="http://www.zkoss.org/zksandbox/img/Centigrade-Widget-Icons/Briefcase-128x128.png" label="Folder">
<attribute name="onCreate">
<!-- make this component focusable and can handle onCtrlKey event -->
Clients.evalJavaScript("makeFocusable('"+self.getUuid()+"')");
</attribute>
</fisheye>
<fisheye onFocus="lb.setVisible(true);" onBlur="lb.setVisible(false);" use="CustomFisheye"
image="http://www.zkoss.org/zksandbox/img/Centigrade-Widget-Icons/ReadingGlass-128x128.png" label="Reading Glasses">
<attribute name="onCreate">
<!-- make this component focusable and can handle onCtrlKey event -->
Clients.evalJavaScript("makeFocusable('"+self.getUuid()+"')");
</attribute>
</fisheye>
</fisheyebar>
</div>
</zk>