org.sakaiproject.sitestats.tool.wicket.widget.WidgetTabs.java Source code

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Here is the source code for org.sakaiproject.sitestats.tool.wicket.widget.WidgetTabs.java

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/**
 * $URL$
 * $Id$
 *
 * Copyright (c) 2006-2009 The Sakai Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ECL-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 org.sakaiproject.sitestats.tool.wicket.widget;

import java.util.ArrayList;
import java.util.List;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.ajax.AbstractDefaultAjaxBehavior;
import org.apache.wicket.ajax.AjaxChannel;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.IAjaxIndicatorAware;
import org.apache.wicket.ajax.attributes.AjaxRequestAttributes;
import org.apache.wicket.extensions.ajax.markup.html.IndicatingAjaxFallbackLink;
import org.apache.wicket.extensions.markup.html.tabs.AbstractTab;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.list.Loop;
import org.apache.wicket.markup.html.list.LoopItem;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.Model;

public class WidgetTabs extends Panel implements IAjaxIndicatorAware {
    private static final long serialVersionUID = 1L;
    private LoadSelectedTabBehavior loadSelectedTabBehavior = null;
    private List<AbstractTab> tabs;

    public WidgetTabs(String id, List<AbstractTab> tabs) {
        this(id, tabs, -1);
    }

    public WidgetTabs(String id, List<AbstractTab> tabs, int selectedTab) {
        super(id, new Model(Integer.valueOf(-1)));
        setOutputMarkupId(true);
        setVersioned(false);
        this.setTabs(tabs);
        if (this.tabs == null) {
            this.tabs = new ArrayList<AbstractTab>();
        }

        // tabs   
        Loop tabLoop = new Loop("tabs", tabs.size()) {
            private static final long serialVersionUID = 1L;

            @Override
            protected void populateItem(LoopItem item) {
                int index = item.getIndex();
                AbstractTab tab = ((AbstractTab) WidgetTabs.this.tabs.get(index));

                int selected = getSelectedTab();
                if (index == selected) {
                    item.add(new AttributeModifier("class", new Model("tabsel")));
                }

                final WebMarkupContainer titleLink = newLink("link", index);
                titleLink.add(new Label("title", tab.getTitle()));
                item.add(titleLink);
            }
        };
        add(tabLoop);

        // add ajax behavior
        loadSelectedTabBehavior = new LoadSelectedTabBehavior();
        add(loadSelectedTabBehavior);

        // select initial tab
        setSelectedTab(selectedTab, false);
    }

    protected void onBeforeRender() {
        super.onBeforeRender();
        if (!hasBeenRendered() && getSelectedTab() == -1) {
            setSelectedTab(0, false);
        }
    }

    public void setTabs(List<AbstractTab> tabs) {
        this.tabs = tabs;
    }

    public List<AbstractTab> getTabs() {
        return tabs;
    }

    public void setSelectedTab(int selectedTab) {
        setSelectedTab(selectedTab, true);
    }

    public void setSelectedTab(int selectedTab, boolean showTabContents) {
        if (selectedTab < 0 || selectedTab >= tabs.size()) {
            throw new IndexOutOfBoundsException();
        }
        setDefaultModelObject(Integer.valueOf(selectedTab));
        AbstractTab tab = getTabs().get(selectedTab);
        WebMarkupContainer tabContents = null;
        if (showTabContents) {
            tabContents = tab.getPanel("tabContents");
        } else {
            tabContents = new WebMarkupContainer("tabContents");
        }
        if (get("tabContents") == null) {
            add(tabContents);
        } else {
            replace(tabContents);
        }
    }

    public int getSelectedTab() {
        return ((Integer) getDefaultModelObject()).intValue();
    }

    public String getLoadSelectedTabScript() {
        return loadSelectedTabBehavior.getScript();

    }

    protected WebMarkupContainer newLink(String linkId, final int index) {
        return new IndicatingAjaxFallbackLink(linkId) {
            private static final long serialVersionUID = 1L;

            public void onClick(AjaxRequestTarget target) {
                setSelectedTab(index);
                if (target != null) {
                    target.add(WidgetTabs.this);
                    target.appendJavaScript("setMainFrameHeightNoScroll(window.name, 0, 100);");
                }
                onAjaxUpdate(target);
            }
        };
    }

    protected void onAjaxUpdate(AjaxRequestTarget target) {
    }

    public String getAjaxIndicatorMarkupId() {
        return null;
    }

    private class LoadSelectedTabBehavior extends AbstractDefaultAjaxBehavior {
        private static final long serialVersionUID = 1L;

        @Override
        protected void respond(AjaxRequestTarget target) {
            setSelectedTab(getSelectedTab());
            target.add(WidgetTabs.this);
            target.appendJavaScript("setMainFrameHeightNoScroll(window.name);");
        }

        public String getScript() {
            StringBuilder buff = new StringBuilder();
            buff.append("wicketAjaxGet('");
            buff.append(getCallbackUrl());
            buff.append(",function() {}, function() {}");
            buff.append(",null, '").append(getAttributes().getChannel().getName()).append("'");
            buff.append(")");
            return buff.toString();
        }

        @Override
        protected void updateAjaxAttributes(AjaxRequestAttributes attributes) {
            super.updateAjaxAttributes(attributes);

            attributes.setChannel(new AjaxChannel(getId()));
        }
    }
}