com.tractionsoftware.gwt.demo.singlelistbox.client.SingleListBoxDemo.java Source code

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Here is the source code for com.tractionsoftware.gwt.demo.singlelistbox.client.SingleListBoxDemo.java

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/*
 * Copyright 2010 Traction Software, 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 com.tractionsoftware.gwt.demo.singlelistbox.client;

import java.util.Date;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.RootPanel;
import com.tractionsoftware.gwt.user.client.ui.SingleListBox;

public class SingleListBoxDemo implements EntryPoint {

    private ListBox eventListBox;
    private SingleListBox singleListBox;

    @Override
    public void onModuleLoad() {

        eventListBox = new ListBox(true);
        eventListBox.setVisibleItemCount(20);
        RootPanel.get("eventlog").add(eventListBox);

        singleListBox = new SingleListBox();
        singleListBox.addItem("Apples");
        singleListBox.addItem("Bananas");
        singleListBox.addItem("Oranges");
        singleListBox.addItem("Pears");
        singleListBox.addValueChangeHandler(new ValueChangeHandler<String>() {
            @Override
            public void onValueChange(ValueChangeEvent<String> event) {
                addEvent("ValueChangeEvent: " + event.getValue());
            }
        });
        Panel select = RootPanel.get("select");
        select.add(singleListBox);

        Panel toggle = RootPanel.get("toggle");
        toggle.add(createSetAddMissingValue(true));
        toggle.add(createSetAddMissingValue(false));

        Panel controls1 = RootPanel.get("controls1");
        controls1.add(createSelectButton("Bananas"));
        controls1.add(createSelectButton("Pears"));

        Panel controls2 = RootPanel.get("controls2");
        controls2.add(createSelectButton("Kiwis"));
        controls2.add(createSelectButton("Watermelons"));
    }

    private void addEvent(String event) {
        eventListBox.insertItem(new Date() + " - " + event, 0);
    }

    private Button createSelectButton(final String value) {
        Button ret = new Button("setValue(\"" + value + "\",true)");
        ret.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                singleListBox.setValue(value, true);
            }
        });
        return ret;
    }

    private Button createSetAddMissingValue(final boolean addMissingValue) {
        Button ret = new Button("setAddMissingValue(" + addMissingValue + ")");
        ret.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                singleListBox.setAddMissingValue(addMissingValue);
            }
        });
        return ret;
    }

}