/*
* Copyright 2006 Google Inc.
*
* 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 net.pleso.framework.client.ui.controls.tabcontrol;
import java.util.Iterator;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.DeckPanel;
import com.google.gwt.user.client.ui.HasWidgets;
import com.google.gwt.user.client.ui.IndexedPanel;
import com.google.gwt.user.client.ui.SourcesTabEvents;
import com.google.gwt.user.client.ui.TabListener;
import com.google.gwt.user.client.ui.TabListenerCollection;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.ui.WidgetCollection;
/**
* A panel that represents a tabbed set of pages, each of which contains another
* widget. Its child widgets are shown as the user selects the various tabs
* associated with them. The tabs can contain arbitrary HTML.
*
* Modified for "Close tab" button functionality.
*
* <p>
* Note that this widget is not a panel per se, but rather a
* {@link com.google.gwt.user.client.ui.Composite} that aggregates a
* {@link com.google.gwt.user.client.ui.TabBar} and a
* {@link com.google.gwt.user.client.ui.DeckPanel}. It does, however, implement
* {@link com.google.gwt.user.client.ui.HasWidgets}.
* </p>
*
* <h3>CSS Style Rules</h3>
* <ul class='css'>
* <li>.gwt-TabPanel { the tab panel itself }</li>
* <li>.gwt-TabPanelBottom { the bottom section of the tab panel (the deck
* containing the widget) }</li>
* </ul>
*
* <p>
* <h3>Example</h3> {@example com.google.gwt.examples.TabPanelExample}
* </p>
*/
public class TabPanel extends Composite implements TabListener,
SourcesTabEvents, HasWidgets, IndexedPanel, RemoveTabListener {
private WidgetCollection children = new WidgetCollection(this);
private DeckPanel deck = new DeckPanel();
private TabBar tabBar = new TabBar();
private TabListenerCollection tabListeners;
/**
* Creates an empty tab panel.
*/
public TabPanel() {
VerticalPanel panel = new VerticalPanel();
panel.add(tabBar);
panel.add(deck);
panel.setCellHeight(deck, "100%");
tabBar.setWidth("100%");
tabBar.addTabListener(this);
tabBar.setRemoveTabListener(this);
initWidget(panel);
setStyleName("gwt-TabPanel");
deck.setStyleName("gwt-TabPanelBottom");
}
public void add(Widget w) {
throw new UnsupportedOperationException(
"A tabText parameter must be specified with add().");
}
/**
* Adds a widget to the tab panel.
*
* @param w the widget to be added
* @param tabText the text to be shown on its tab
*/
public void add(Widget w, String tabText) {
insert(w, tabText, getWidgetCount());
}
/**
* Adds a widget to the tab panel.
*
* @param w the widget to be added
* @param tabText the text to be shown on its tab
* @param asHTML <code>true</code> to treat the specified text as HTML
*/
public void add(Widget w, String tabText, boolean asHTML) {
insert(w, tabText, asHTML, getWidgetCount());
}
public void addTabListener(TabListener listener) {
if (tabListeners == null) {
tabListeners = new TabListenerCollection();
}
tabListeners.add(listener);
}
public void clear() {
while (getWidgetCount() > 0) {
remove(getWidget(0));
}
}
/**
* Gets the deck panel within this tab panel.
*
* @return the deck panel
*/
public DeckPanel getDeckPanel() {
return deck;
}
/**
* Gets the tab bar within this tab panel.
*
* @return the tab bar
*/
public TabBar getTabBar() {
return tabBar;
}
public Widget getWidget(int index) {
return children.get(index);
}
public int getWidgetCount() {
return children.size();
}
public int getWidgetIndex(Widget widget) {
return children.indexOf(widget);
}
/**
* Inserts a widget into the tab panel.
*
* @param widget the widget to be inserted
* @param tabText the text to be shown on its tab
* @param asHTML <code>true</code> to treat the specified text as HTML
* @param beforeIndex the index before which it will be inserted
*/
public void insert(Widget widget, String tabText, boolean asHTML,
int beforeIndex) {
children.insert(widget, beforeIndex);
tabBar.insertTab(tabText, asHTML, beforeIndex);
deck.insert(widget, beforeIndex);
}
/**
* Inserts a widget into the tab panel.
*
* @param widget the widget to be inserted
* @param tabText the text to be shown on its tab
* @param beforeIndex the index before which it will be inserted
*/
public void insert(Widget widget, String tabText, int beforeIndex) {
insert(widget, tabText, false, beforeIndex);
}
public Iterator iterator() {
return children.iterator();
}
public boolean onBeforeTabSelected(SourcesTabEvents sender, int tabIndex) {
if (tabListeners != null) {
return tabListeners.fireBeforeTabSelected(this, tabIndex);
}
return true;
}
public void onTabSelected(SourcesTabEvents sender, int tabIndex) {
deck.showWidget(tabIndex);
if (tabListeners != null) {
tabListeners.fireTabSelected(this, tabIndex);
}
}
public boolean remove(int index) {
return remove(getWidget(index));
}
/**
* Removes the given widget, and its associated tab.
*
* @param widget the widget to be removed
*/
public boolean remove(Widget widget) {
int index = getWidgetIndex(widget);
if (index == -1) {
return false;
}
children.remove(widget);
deck.remove(widget);
tabBar.removeTab(index);
return true;
}
public void removeTabListener(TabListener listener) {
if (tabListeners != null) {
tabListeners.remove(listener);
}
}
/**
* Programmatically selects the specified tab.
*
* @param index the index of the tab to be selected
*/
public void selectTab(int index) {
tabBar.selectTab(index);
}
private RemoveTabListener removeTabListener = null;
public RemoveTabListener getRemoveTabListener() {
return removeTabListener;
}
public void setRemoveTabListener(RemoveTabListener removeTabListener) {
this.removeTabListener = removeTabListener;
}
public void fireBeforeRemoveTab(int index) {
if (removeTabListener != null){
removeTabListener.fireBeforeRemoveTab(index);
}
}
}