/*
* Ext GWT 2.2.4 - Ext for GWT
* Copyright(c) 2007-2010, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
package com.extjs.gxt.ui.client.widget;
import java.util.ArrayList;
import java.util.List;
import com.extjs.gxt.ui.client.core.El;
import com.extjs.gxt.ui.client.core.XDOM;
import com.extjs.gxt.ui.client.util.Rectangle;
import com.google.gwt.dom.client.NodeList;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.Window;
/**
* An class that supports placing a shim over the client window, and optionally
* just over IFrames.
* <p/>
* Used by Draggable, Resizable and SplitBar
*/
public class Shim {
private static Shim instance;
private Shim() {
}
private List<El> shims = new ArrayList<El>();
/**
* Creates and covers the area with a Shim. If shimIframes is true will only
* covers IFrames.
*
* @param shimIframes true if you want to cover only Iframes
*/
public void cover(boolean shimIframes) {
if (shimIframes) {
NodeList<Element> elements = XDOM.getBodyEl().select("iframe:not(.x-noshim)");
shim(elements);
elements = XDOM.getBodyEl().select("object:not(.x-noshim)");
shim(elements);
elements = XDOM.getBodyEl().select("applet:not(.x-noshim)");
shim(elements);
elements = XDOM.getBodyEl().select("embed:not(.x-noshim)");
shim(elements);
} else {
shims.add(createShim(null, 0, 0, Window.getClientWidth(), Window.getClientHeight()));
}
}
public static Shim get() {
if (instance == null) {
instance = new Shim();
}
return instance;
}
public void setStyleAttribute(String attr, String value) {
for (El shim : shims) {
shim.setStyleAttribute(attr, value);
}
}
/**
* Uncovers and removes the shim.
*/
public void uncover() {
while (!shims.isEmpty()) {
shims.get(0).remove();
shims.remove(0);
}
}
protected El createShim(Element element, int left, int top, int width, int height) {
Layer shim = new Layer();
shim.hide();
shim.enableShim();
shim.addStyleName("x-drag-overlay");
shim.setSize(width, height);
shim.setLeftTop(left, top);
shim.update(" ");
El parent = null;
if (element != null) {
parent = El.fly(element).getParent();
}
if (parent != null) {
parent.appendChild(shim.dom);
} else {
XDOM.getBody().appendChild(shim.dom);
}
shim.show();
if (element != null) {
shim.setZIndex(El.fly(element).getZIndex() + 1);
} else {
shim.setZIndex(XDOM.getTopZIndex());
}
return shim;
}
protected void shim(NodeList<Element> elements) {
for (int i = 0; i < elements.getLength(); i++) {
Element e = elements.getItem(i);
Rectangle bounds = El.fly(e).getBounds(true);
if (bounds.height > 0 && bounds.width > 0 && El.fly(e).isVisible()) {
shims.add(createShim(e, bounds.x, bounds.y, bounds.width, bounds.height));
}
}
}
}