com.google.gwt.visualization.client.events.OnMouseOverHandler.java Source code

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Here is the source code for com.google.gwt.visualization.client.events.OnMouseOverHandler.java

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/*
 * Copyright 2009 Google Inc.
 * 
 * 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.google.gwt.visualization.client.events;

import com.google.gwt.ajaxloader.client.Properties;
import com.google.gwt.ajaxloader.client.Properties.TypeException;

/**
 * This class handles onmouseover events for visualizations such as
 * browsercharts.
 */
public abstract class OnMouseOverHandler extends Handler {
    /**
     * The onmouseover event is fired when the mouse is over data displayed in the
     * visualization.
     */
    public static class OnMouseOverEvent {
        private int row;
        private int column;

        public OnMouseOverEvent(int row, int column) {
            this.row = row;
            this.column = column;
        }

        public int getColumn() {
            return column;
        }

        public int getRow() {
            return row;
        }
    }

    public abstract void onMouseOverEvent(OnMouseOverEvent event);

    @Override
    protected void onEvent(Properties properties) throws TypeException {
        Double boxedRow = properties.getNumber("row");
        int row = boxedRow == null ? -1 : boxedRow.intValue();
        Double boxedColumn = properties.getNumber("column");
        int column = boxedColumn == null ? -1 : boxedColumn.intValue();
        onMouseOverEvent(new OnMouseOverEvent(row, column));
    }
}