org.openelis.gwt.widget.ScrollableTabBar.java Source code

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Here is the source code for org.openelis.gwt.widget.ScrollableTabBar.java

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/** Exhibit A - UIRF Open-source Based Public Software License.
* 
* The contents of this file are subject to the UIRF Open-source Based
* Public Software License(the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* openelis.uhl.uiowa.edu
* 
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
* 
* The Original Code is OpenELIS code.
* 
* The Initial Developer of the Original Code is The University of Iowa.
* Portions created by The University of Iowa are Copyright 2006-2008. All
* Rights Reserved.
* 
* Contributor(s): ______________________________________.
* 
* Alternatively, the contents of this file marked
* "Separately-Licensed" may be used under the terms of a UIRF Software
* license ("UIRF Software License"), in which case the provisions of a
* UIRF Software License are applicable instead of those above. 
*/
package org.openelis.gwt.widget;

import com.google.gwt.event.logical.shared.BeforeSelectionHandler;
import com.google.gwt.event.logical.shared.HasBeforeSelectionHandlers;
import com.google.gwt.event.logical.shared.HasSelectionHandlers;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.event.logical.shared.SelectionHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.TabBar;
import com.google.gwt.user.client.ui.Widget;

public class ScrollableTabBar extends Composite
        implements HasSelectionHandlers<Integer>, HasBeforeSelectionHandlers<Integer> {

    private TabBar tabBar = new TabBar();
    private TabBarScroller barScroller;

    public ScrollableTabBar() {
        barScroller = new TabBarScroller(tabBar);
        initWidget(barScroller);

        final HasSelectionHandlers<Integer> source = this;
        tabBar.addSelectionHandler(new SelectionHandler<Integer>() {
            public void onSelection(SelectionEvent<Integer> event) {
                SelectionEvent.fire(source, event.getSelectedItem());
                barScroller.scrollToSelected();
            }
        });

    }

    public void selectTab(int index) {
        tabBar.selectTab(index);
    }

    public void setWidth(String width) {
        barScroller.setWidth(width);
    }

    public void setHeight(String height) {
        barScroller.setHeight(height);
    }

    public void addTab(String text) {
        tabBar.addTab(text);
        tabBar.setVisible(true);
    }

    public void addTab(Widget widget) {
        tabBar.addTab(widget);
        tabBar.setVisible(true);
        barScroller.checkScroll();
    }

    public void addTabAndSelect(String text) {
        tabBar.addTab(text);
        selectTab(tabBar.getTabCount() - 1);
        tabBar.setVisible(true);
        barScroller.checkScroll();
    }

    public void addTabAndSelect(Widget widget) {
        tabBar.addTab(widget);
        selectTab(tabBar.getTabCount() - 1);
        tabBar.setVisible(true);
        barScroller.checkScroll();
    }

    public void removeTab(int index) {
        tabBar.removeTab(index);
        if (tabBar.getTabCount() == 0)
            tabBar.setVisible(false);
        barScroller.checkScroll();
    }

    public void clearTabs() {
        while (tabBar.getTabCount() > 0)
            removeTab(0);
        barScroller.checkScroll();
    }

    public TabBar getTabBar() {
        return tabBar;
    }

    public void onSelection(SelectionEvent<Integer> event) {
        selectTab(event.getSelectedItem());

    }

    public HandlerRegistration addSelectionHandler(SelectionHandler<Integer> handler) {
        return addHandler(handler, SelectionEvent.getType());
    }

    public HandlerRegistration addBeforeSelectionHandler(BeforeSelectionHandler<Integer> handler) {
        return tabBar.addBeforeSelectionHandler(handler);
    }
}