com.sciencegadgets.client.ui.ToggleSlide.java Source code

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Here is the source code for com.sciencegadgets.client.ui.ToggleSlide.java

Source

/*******************************************************************************
 *     This file is part of ScienceGadgets, a collection of educational tools
 *     Copyright (C) 2012-2015 by John Gralyan
 *
 *     ScienceGadgets is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU Affero General Public License as
 *     published by the Free Software Foundation, either version 3 of
 *     the License, or (at your option) any later version.
 *
 *     ScienceGadgets is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU Affero General Public License for more details.
 *
 *     You should have received a copy of the GNU Affero General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *     
 *     Contact us at info@sciencegadgets.org
 *******************************************************************************/
package com.sciencegadgets.client.ui;

import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.Style;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.HasClickHandlers;
import com.google.gwt.event.dom.client.HasTouchStartHandlers;
import com.google.gwt.event.dom.client.TouchStartEvent;
import com.google.gwt.event.dom.client.TouchStartHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HTML;
import com.sciencegadgets.client.Moderator;

public class ToggleSlide extends FlowPanel implements HasClickHandlers, HasTouchStartHandlers {
    HTML firstOption = new HTML();
    HTML secondOption = new HTML();
    HTML selectedOption = null;

    public ToggleSlide(String first, String second, boolean firstIsSelected, ClickHandler clickHandler) {
        this(first, second, firstIsSelected);
        addClickHandler(clickHandler);
    }

    public ToggleSlide(String first, String second, boolean firstIsSelected) {
        this();
        setOptions(first, second, firstIsSelected);
    }

    /**
     * Be sure to set the options with {@link #setOptions(String, String, boolean)}
     */
    public ToggleSlide() {

        this.addStyleName(CSS.TOGGLE_SLIDE);

        firstOption.addStyleName(CSS.TOGGLE_OPTION);
        secondOption.addStyleName(CSS.TOGGLE_OPTION);

        this.add(firstOption);
        this.add(secondOption);

        if (Moderator.isTouch) {
            addTouchStartHandler(new TouchStartHandler() {
                @Override
                public void onTouchStart(TouchStartEvent event) {
                    toggle();
                }
            });
        } else {
            addClickHandler(new ClickHandler() {
                @Override
                public void onClick(ClickEvent event) {
                    toggle();
                }
            });
        }

    }

    private void toggle() {
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {

            @Override
            public void execute() {
                if (firstOption.equals(selectedOption)) {
                    selectedOption = secondOption;
                    secondOption.addStyleName(CSS.TOGGLE_OPTION_SELECTED);
                    firstOption.removeStyleName(CSS.TOGGLE_OPTION_SELECTED);
                } else {
                    selectedOption = firstOption;
                    firstOption.addStyleName(CSS.TOGGLE_OPTION_SELECTED);
                    secondOption.removeStyleName(CSS.TOGGLE_OPTION_SELECTED);

                }
            }
        });

    }

    public void enable(boolean enable) {
        Style style = getElement().getStyle();
        if (enable) {
            style.clearColor();
        } else {
            style.setColor("gray");
        }
    }

    public void setOptions(String first, String second, boolean firstIsSelected) {
        firstOption.setText(first);
        secondOption.setText(second);
        setOptions(firstIsSelected);

    }

    public void setOptionsHtml(String first, String second, boolean firstIsSelected) {
        firstOption.setHTML(first);
        secondOption.setHTML(second);
        setOptions(firstIsSelected);
    }

    public void setOptions(SafeHtml first, SafeHtml second, boolean firstIsSelected) {
        firstOption.setHTML(first);
        secondOption.setHTML(second);
        setOptions(firstIsSelected);
    }

    private void setOptions(boolean firstIsSelected) {

        if (firstIsSelected) {
            selectedOption = firstOption;
            firstOption.addStyleName(CSS.TOGGLE_OPTION_SELECTED);
        } else {
            selectedOption = secondOption;
            secondOption.addStyleName(CSS.TOGGLE_OPTION_SELECTED);
        }
    }

    public boolean isFistSelected() {
        return firstOption.equals(selectedOption);
    }

    @Override
    public HandlerRegistration addClickHandler(ClickHandler handler) {
        return addDomHandler(handler, ClickEvent.getType());
    }

    @Override
    public HandlerRegistration addTouchStartHandler(TouchStartHandler handler) {
        return addDomHandler(handler, TouchStartEvent.getType());
    }
}