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

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Here is the source code for org.unitime.timetable.gwt.client.aria.ClickableHint.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 com.google.gwt.aria.client.Roles;
import com.google.gwt.dom.client.Document;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.Focusable;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.impl.FocusImpl;

/**
 * @author Tomas Muller
 */
public class ClickableHint extends Label implements HasAriaLabel, Focusable {

    public ClickableHint(String text) {
        super(text);
        getElement().setTabIndex(0);
        setStyleName("unitime-Hint");
        sinkEvents(Event.KEYEVENTS);
        Roles.getLinkRole().set(getElement());
    }

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

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

    @Override
    public int getTabIndex() {
        return getElement().getTabIndex();
    }

    @Override
    public void setTabIndex(int index) {
        getElement().setTabIndex(index);
    }

    @Override
    public void setAccessKey(char key) {
        FocusImpl.getFocusImplForWidget().setAccessKey(getElement(), key);
    }

    @Override
    public void setFocus(boolean focused) {
        if (focused)
            getElement().focus();
        else
            getElement().blur();
    }

    protected void onClick() {
        getElement().dispatchEvent(Document.get().createClickEvent(1, 0, 0, 0, 0, false, false, false, false));
    }

    @Override
    public void onBrowserEvent(Event event) {
        super.onBrowserEvent(event);

        if ((event.getTypeInt() & Event.KEYEVENTS) != 0) {
            int type = DOM.eventGetType(event);
            char keyCode = (char) event.getKeyCode();
            switch (type) {
            case Event.ONKEYUP:
                if (keyCode == ' ' || keyCode == '\n' || keyCode == '\r')
                    onClick();
                break;
            }
        }
    }
}