/*
* Copyright (c) 2010 Zhihua (Dennis) Jiang
*
* 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.gwtmobile.ui.client.widgets;
import java.beans.Beans;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.Element;
import com.google.gwt.user.client.ui.Widget;
import com.gwtmobile.ui.client.CSS.StyleNames.Secondary;
import com.gwtmobile.ui.client.utils.Utils;
public class Stack extends PanelBase {
StackHeader _header;
StackContent _content;
public enum StackInitialState { Default, Collapsed, Expanded };
private StackInitialState _initialState = StackInitialState.Default;
private boolean _freezeState = false;
@Override
protected String getDesignTimeMessage() {
return "Add a StackHeader widget and a StackConent widget.";
}
@Override
public void onInitialLoad() {
switch (_initialState) {
case Collapsed:
collapse();
break;
case Expanded:
expand();
break;
default:
if (Beans.isDesignTime()) {
expand();
}
else {
collapse();
}
}
}
@Override
public void add(Widget w) {
if (w instanceof StackHeader) {
if (_header == null) {
_header = (StackHeader) w;
}
else {
assert false: "Stack widget can only contain one StackHeader widget.";
}
}
else if (w instanceof StackContent) {
if (_content == null) {
_content = (StackContent) w;
}
else {
assert false: "Stack widget can only contain one StackContent widget.";
}
}
else if (!isDesignTimeEmptyLabel(w)) {
assert false: "Stack widget can only contain a StackHeader widget a StackContent widget.";
}
super.add(w);
}
public void collapse() {
this.addStyleName(Secondary.Collapsed);
this.removeStyleName(Secondary.Expanded);
Element focus = Utils.getActiveElement();
focus.blur();
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
@Override
public void execute() {
if (_content != null)
_content.setHeight("0px");
}
});
}
public void expand() {
if (isExpended()) {
return;
}
Stack.this.addStyleName(Secondary.Expanded);
Stack.this.removeStyleName(Secondary.Collapsed);
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
@Override
public void execute() {
_content.setHeight(_content.getElement().getScrollHeight() - Utils.getPaddingHeight(_content.getElement()) + "px");
}
});
}
public void toggle() {
if (isFreezeState()) return;
if (!isExpended()) {
expand();
} else {
collapse();
}
}
public boolean isExpended() {
return this.getStyleName().indexOf(Secondary.Expanded) > -1;
}
public StackHeader getHeader() {
return _header;
}
public StackContent getContent() {
return _content;
}
public StackInitialState getInitialState() {
return _initialState;
}
public void setInitialState(StackInitialState initialState) {
this._initialState = initialState;
}
public boolean isFreezeState() {
return _freezeState;
}
public void setFreezeState(boolean freezeState) {
this._freezeState = freezeState;
}
}