org.unitime.timetable.gwt.client.widgets.HorizontalPanelWithHint.java Source code

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Here is the source code for org.unitime.timetable.gwt.client.widgets.HorizontalPanelWithHint.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.widgets;

import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * @author Tomas Muller
 */
public class HorizontalPanelWithHint extends HorizontalPanel {
    private PopupPanel iHint = null;
    private Timer iShowHint, iHideHint = null;

    public HorizontalPanelWithHint(Widget hint) {
        super();
        iHint = new PopupPanel();
        iHint.setWidget(hint);
        iHint.setStyleName("unitime-PopupHint");
        sinkEvents(Event.ONMOUSEOVER);
        sinkEvents(Event.ONMOUSEOUT);
        sinkEvents(Event.ONMOUSEMOVE);
        iShowHint = new Timer() {
            @Override
            public void run() {
                iHint.show();
            }
        };
        iHideHint = new Timer() {
            @Override
            public void run() {
                iHint.hide();
            }
        };
    }

    public void hideHint() {
        iShowHint.cancel();
        if (iHint.isShowing()) {
            iHint.hide();
        }
    }

    public void onBrowserEvent(Event event) {
        int x = 10 + event.getClientX() + getElement().getOwnerDocument().getScrollLeft();
        int y = 10 + event.getClientY() + getElement().getOwnerDocument().getScrollTop();

        switch (DOM.eventGetType(event)) {
        case Event.ONMOUSEMOVE:
            if (iHint.isShowing()) {
                iHint.setPopupPosition(x, y);
            } else {
                iShowHint.cancel();
                iHint.setPopupPosition(x, y);
                iShowHint.schedule(1000);
            }
            break;
        case Event.ONMOUSEOUT:
            iShowHint.cancel();
            if (iHint.isShowing())
                iHideHint.schedule(1000);
            break;
        }
    }
}