SliderExample.java

/*******************************************************************************
 *
 * 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.example.slider.client;

import com.example.slider.client.widget.slider.RangeSlider;
import com.example.slider.client.widget.slider.Slider;
import com.example.slider.client.widget.slider.SliderEvent;
import com.example.slider.client.widget.slider.SliderListener;
import com.example.slider.client.widget.slider.SliderOption;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.json.client.JSONNumber;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class SliderExample implements EntryPoint, SliderListener
{

    private Slider m_slider;
    private RangeSlider m_rangeSlider;
    private Slider m_stepSlider;
    private Slider m_multiSlider;
    
    private Label m_sliderLabel;
    private Label m_rangeSliderLabel;
    private Label m_stepSliderLabel;
    private Label m_multiSliderLabel;
    
    /**
     * This is the entry point method.
     */
    public void onModuleLoad()
    {
        /*
         * Create a slider with default behavior:
         * minimum possible value of 0, maximum possible value of 100,
         * default value of 25
         */
        Label sliderLabel = new Label("Value:");
        m_sliderLabel = new Label("0");
        m_sliderLabel.addStyleName("slider-values");
        m_slider = new Slider("slider");
        RootPanel.get("sliderContainer").add(sliderLabel);
        RootPanel.get("sliderContainer").add(m_sliderLabel);
        RootPanel.get("sliderContainer").add(m_slider);
        m_slider.addListener(this);

        /*
         * Create a RangeSlider with:
         * minimum possible value of 0, maximum possible value of 100,
         * default range of 25-40
         */
        Label rangeLabel = new Label("Price range:");
        m_rangeSliderLabel = new Label("$25 - $40");
        m_rangeSliderLabel.addStyleName("slider-values");
        m_rangeSlider = new RangeSlider("range", 0, 100, 25, 40);
        RootPanel.get("rangeContainer").add(rangeLabel);
        RootPanel.get("rangeContainer").add(m_rangeSliderLabel);
        RootPanel.get("rangeContainer").add(m_rangeSlider);
        m_rangeSlider.addListener(this);

        /*
         * Create a slider with:
         * minimum possible value of 50, maximum possible value of 500,
         * default 100, and step of 50
         * and 
         */
        Label stepLabel = new Label("Donation amount ($50 increments):");
        m_stepSliderLabel = new Label("$200");
        m_stepSliderLabel.addStyleName("slider-values");
        JSONObject options = Slider.getOptions(50, 500, new int[]{200});
        options.put(SliderOption.STEP.toString(), new JSONNumber(50));
        m_stepSlider = new Slider("step", options);
        RootPanel.get("stepContainer").add(stepLabel);
        RootPanel.get("stepContainer").add(m_stepSliderLabel);
        RootPanel.get("stepContainer").add(m_stepSlider);
        m_stepSlider.addListener(this);
        
        /*
         * Create a slider with:
         * minimum possible value of 0, maximum possible value of 100,
         * default values of 25, 50, and 75
         */
        Label multiLabel = new Label("Values:");
        m_multiSliderLabel = new Label("25, 50, 75");
        m_multiSliderLabel.addStyleName("slider-values");
        m_multiSlider = new Slider("multi", 0, 100, new int[]{25, 50, 75});
        RootPanel.get("multiContainer").add(multiLabel);
        RootPanel.get("multiContainer").add(m_multiSliderLabel);
        RootPanel.get("multiContainer").add(m_multiSlider);
        m_multiSlider.addListener(this);        
    }

    @Override
    public void onChange(SliderEvent e)
    {
        //We don't need to do anything, because everything is done in onSlide in this example
    }

    @Override
    public boolean onSlide(SliderEvent e)
    {
        Slider source = e.getSource();
        if (source == m_slider) {
            m_sliderLabel.setText("" + e.getValues()[0]);
        } else if (source == m_rangeSlider) {
            m_rangeSliderLabel.setText("$" + e.getValues()[0] + " - $" + e.getValues()[1]);
        } else if (source == m_stepSlider) {
            m_stepSliderLabel.setText("$" + e.getValues()[0]);
        } else if (source == m_multiSlider) {
            m_multiSliderLabel.setText(e.getValues()[0] + ", " + e.getValues()[1]  + ", " + e.getValues()[2]);
        } 
        return true;
    }

    @Override
    public void onStart(SliderEvent e)
    {
        // We are not going to do anything onStart
    }

    @Override
    public void onStop(SliderEvent e)
    {
        // We are not going to do anything onStop        
    }
}