/**
* Sencha GXT 3.0.0 - Sencha for GWT
* Copyright(c) 2007-2012, Sencha, Inc.
* licensing@sencha.com
*
* http://www.sencha.com/products/gxt/license/
*/
package com.sencha.gxt.fx.client;
import java.util.ArrayList;
import java.util.List;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.NodeList;
import com.google.gwt.dom.client.Style.Display;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Window;
import com.sencha.gxt.core.client.dom.Layer;
import com.sencha.gxt.core.client.dom.XDOM;
import com.sencha.gxt.core.client.dom.XElement;
import com.sencha.gxt.core.client.resources.CommonStyles;
import com.sencha.gxt.core.client.util.Rectangle;
/**
* Supports placing a shim over the client window, and optionally just over
* iframes.
*/
public class Shim {
private static Shim instance;
public static Shim get() {
if (instance == null) {
instance = new Shim();
}
return instance;
}
private List<XElement> shims = new ArrayList<XElement>();
private Shim() {
}
/**
* 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) {
XElement body = Document.get().getBody().<XElement> cast();
if (shimIframes) {
NodeList<Element> elements = body.select("iframe:not(.x-noshim)");
shim(elements);
elements = body.select("object:not(.x-noshim)");
shim(elements);
elements = body.select("applet:not(.x-noshim)");
shim(elements);
elements = body.select("embed:not(.x-noshim)");
shim(elements);
} else {
shims.add(createShim(null, 0, 0, Window.getClientWidth(), Window.getClientHeight()));
}
}
public void setStyleAttribute(String attr, String value) {
for (XElement shim : shims) {
shim.getStyle().setProperty(attr, value);
}
}
/**
* Uncovers and removes the shim.
*/
public void uncover() {
while (!shims.isEmpty()) {
shims.get(0).removeFromParent();
shims.remove(0);
}
}
protected XElement createShim(Element element, int left, int top, int width, int height) {
Layer l = new Layer(DOM.createDiv().<XElement> cast());
l.enableShim();
XElement e = l.getElement();
e.hide();
e.addClassName(CommonStyles.get().shim());
e.setSize(width, height);
e.setLeftTop(left, top);
e.setInnerHTML(" ");
Element parent = null;
if (element != null) {
parent = element.getParentElement();
}
if (parent != null) {
parent.appendChild(e);
} else {
Document.get().getBody().appendChild(e);
}
e.getStyle().setDisplay(Display.BLOCK);
if (element != null) {
e.setZIndex(element.<XElement> cast().getZIndex() + 1);
} else {
e.setZIndex(XDOM.getTopZIndex());
}
return e;
}
protected void shim(NodeList<Element> elements) {
for (int i = 0; i < elements.getLength(); i++) {
XElement e = elements.getItem(i).<XElement> cast();
Rectangle bounds = e.getBounds(true);
if (bounds.getHeight() > 0 && bounds.getWidth() > 0 && e.isVisible()) {
shims.add(createShim(e, bounds.getX(), bounds.getY(), bounds.getWidth(), bounds.getHeight()));
}
}
}
}