org.unitime.timetable.gwt.client.aria.AriaButton.java Source code

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Here is the source code for org.unitime.timetable.gwt.client.aria.AriaButton.java

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/*
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 *
 * The Apereo Foundation licenses this file to you 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 org.unitime.timetable.gwt.client.aria;

import org.unitime.timetable.gwt.client.ToolBox;
import org.unitime.timetable.gwt.client.widgets.UniTimeHeaderPanel;

import com.google.gwt.aria.client.Roles;
import com.google.gwt.event.dom.client.BlurEvent;
import com.google.gwt.event.dom.client.BlurHandler;
import com.google.gwt.event.dom.client.FocusEvent;
import com.google.gwt.event.dom.client.FocusHandler;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.user.client.ui.Button;

/**
 * @author Tomas Muller
 */
public class AriaButton extends Button implements HasAriaLabel {
    private boolean iFocused = false;

    public AriaButton() {
        super();
    }

    public AriaButton(String html) {
        super(html);
        setAriaLabel(UniTimeHeaderPanel.stripAccessKey(html).replace(" ", " ").replace("‑", "-"));
        Character accessKey = UniTimeHeaderPanel.guessAccessKey(html);
        if (accessKey != null)
            setAccessKey(accessKey);
        ToolBox.setMinWidth(getElement().getStyle(), "75px");
        addFocusHandler(new FocusHandler() {
            @Override
            public void onFocus(FocusEvent event) {
                iFocused = true;
            }
        });
        addBlurHandler(new BlurHandler() {
            @Override
            public void onBlur(BlurEvent event) {
                iFocused = false;
            }
        });
    }

    public AriaButton(ImageResource image, String html) {
        super(html);
        super.setHTML("<img src='" + image.getSafeUri().asString()
                + "' class='gwt-Image'></img><span class='gwt-Label' style='padding-left: 5px;'>" + html
                + "</span>");
        addStyleName("unitime-ImageButton");
        setAriaLabel(UniTimeHeaderPanel.stripAccessKey(html));
        Character accessKey = UniTimeHeaderPanel.guessAccessKey(html);
        if (accessKey != null)
            setAccessKey(accessKey);
        ToolBox.setMinWidth(getElement().getStyle(), "75px");
        addFocusHandler(new FocusHandler() {
            @Override
            public void onFocus(FocusEvent event) {
                iFocused = true;
            }
        });
        addBlurHandler(new BlurHandler() {
            @Override
            public void onBlur(BlurEvent event) {
                iFocused = false;
            }
        });
    }

    public AriaButton(String html, ImageResource image) {
        super(html);
        super.setHTML("<span class='gwt-Label' style='padding-right: 5px;'>" + html + "</span><img src='"
                + image.getSafeUri().asString() + "' class='gwt-Image'></img>");
        addStyleName("unitime-ImageButton");
        setAriaLabel(UniTimeHeaderPanel.stripAccessKey(html));
        Character accessKey = UniTimeHeaderPanel.guessAccessKey(html);
        if (accessKey != null)
            setAccessKey(accessKey);
        ToolBox.setMinWidth(getElement().getStyle(), "75px");
        addFocusHandler(new FocusHandler() {
            @Override
            public void onFocus(FocusEvent event) {
                iFocused = true;
            }
        });
        addBlurHandler(new BlurHandler() {
            @Override
            public void onBlur(BlurEvent event) {
                iFocused = false;
            }
        });
    }

    @Override
    public void setHTML(String html) {
        super.setHTML(html);
        setAriaLabel(UniTimeHeaderPanel.stripAccessKey(html));
        Character accessKey = UniTimeHeaderPanel.guessAccessKey(html);
        if (accessKey != null)
            setAccessKey(accessKey);
    }

    @Override
    public void setAriaLabel(String text) {
        if (text == null || text.isEmpty())
            Roles.getButtonRole().removeAriaLabelledbyProperty(getElement());
        else
            Roles.getButtonRole().setAriaLabelProperty(getElement(), text);
    }

    @Override
    public String getAriaLabel() {
        return Roles.getButtonRole().getAriaLabelProperty(getElement());
    }

    public boolean isFocused() {
        return iFocused;
    }
}