/*
* Copyright 2012 GWT-Bootstrap
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.gwtbootstrap.client.ui;
import com.github.gwtbootstrap.client.ui.base.IconAnchor;
import com.github.gwtbootstrap.client.ui.base.UnorderedList;
import com.github.gwtbootstrap.client.ui.event.HideEvent;
import com.github.gwtbootstrap.client.ui.event.HideHandler;
import com.github.gwtbootstrap.client.ui.event.ShowEvent;
import com.github.gwtbootstrap.client.ui.event.ShowHandler;
import com.google.gwt.dom.client.Style;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.Widget;
//@formatter:off
/**
* A dropdown that accepts any type of widget.
* <p>
* <h3>UiBinder Usage:</h3>
*
* <pre>
* {@code
* <b:DropdownContainer text="I am the Caption">
* <b:NavHeader>Header</b:NavHeader>
* <b:NavLink>Link 1</b:NavLink>
* <b:NavLink>Link 2</b:NavLink>
* <b:Button>Hey you, I'm a button</b:Button>
* </b:DropdownContainer>
* }
* </pre>
* </p>
*
* @since 2.0.4.0
*
* @author Carlos Alexandro Becker
* @author Cássio de Freitas e Silva
*
* @see <a href="http://twitter.github.com/bootstrap/javascript.html#dropdowns">Bootstrap documentation</a>
* @see DropdownButton
* @see SplitDropdownButton
* @see Dropdown
*/
public class DropdownContainer extends Dropdown {
private UnorderedList menu = new UnorderedList();
private boolean menuVisible;
private HandlerManager handlerManager;
@Override
protected IconAnchor createTrigger() {
final IconAnchor trigger = super.createTrigger();
trigger.addDomHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
if (menuVisible) {
hideContainer();
} else {
showContainer();
}
}
}, ClickEvent.getType());
return trigger;
}
public DropdownContainer() {
this("");
}
public DropdownContainer(String caption) {
super(caption);
for (Widget widget : getChildren()) {
if (widget instanceof UnorderedList) {
menu = (UnorderedList) widget;
break;
}
}
menu.getElement().getStyle().clearDisplay();
menu.getElement().getStyle().setDisplay(Style.Display.NONE);
handlerManager = createHandlerManager();
}
public void showContainer() {
menu.getElement().getStyle().setDisplay(Style.Display.BLOCK);
menuVisible = true;
for (int i = 0; i < handlerManager.getHandlerCount(ShowEvent.getType()); i++) {
ShowHandler sh = handlerManager.getHandler(ShowEvent.getType(), i);
sh.onShow(new ShowEvent(null));
}
}
public void hideContainer() {
menu.getElement().getStyle().setDisplay(Style.Display.NONE);
menuVisible = false;
for (int i = 0; i < handlerManager.getHandlerCount(HideEvent.getType()); i++) {
HideHandler hh = handlerManager.getHandler(HideEvent.getType(), i);
hh.onHide(new HideEvent(null));
}
}
public HandlerRegistration addHideHandler(HideHandler hideHandler) {
return handlerManager.addHandler(HideEvent.getType(), hideHandler);
}
public HandlerRegistration addShowHandler(ShowHandler showHandler) {
return handlerManager.addHandler(ShowEvent.getType(), showHandler);
}
}