asquare.gwt.tk.client.ui.behavior.MouseEventImpl.java Source code

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Here is the source code for asquare.gwt.tk.client.ui.behavior.MouseEventImpl.java

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/*
 * Copyright 2007 Mat Gessel <mat.gessel@gmail.com>
 * 
 * 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 asquare.gwt.tk.client.ui.behavior;

import com.google.gwt.user.client.*;
import com.google.gwt.user.client.ui.Widget;

public class MouseEventImpl extends InputEventImpl implements MouseEvent {
    private static final long serialVersionUID = 1L;

    private final int m_clientX, m_clientY;
    private final int m_absoluteX, m_absoluteY;
    private final int m_widgetLeft, m_widgetTop;
    private final int m_widgetX, m_widgetY;

    protected MouseEventImpl(MouseEventImpl e) {
        super(e);
        m_clientX = e.m_clientX;
        m_clientY = e.m_clientY;
        m_absoluteX = e.m_absoluteX;
        m_absoluteY = e.m_absoluteY;
        m_widgetLeft = e.m_widgetLeft;
        m_widgetTop = e.m_widgetTop;
        m_widgetX = e.m_widgetX;
        m_widgetY = e.m_widgetY;
    }

    /**
     * @param source the widget which is receiving the mouse event
     * @param mouseEvent a <code>mousedown</code>, <code>mousemove</code> or <code>mouseup</code> event
     * @param type the DOM event type
     * @param previewPhase <code>true</code> if the event was caught in event preview
     */
    public MouseEventImpl(Widget source, Event mouseEvent, int type, boolean previewPhase) {
        super(source, mouseEvent, type, previewPhase);
        Element e = source.getElement();
        m_clientX = DOM.eventGetClientX(mouseEvent);
        m_clientY = DOM.eventGetClientY(mouseEvent);
        m_absoluteX = Window.getScrollLeft() + m_clientX;
        m_absoluteY = Window.getScrollTop() + m_clientY;
        m_widgetLeft = DOM.getAbsoluteLeft(source.getElement());
        m_widgetTop = DOM.getAbsoluteTop(source.getElement());

        /*
         * Translate the coordinates into the source widget's coordinate space
         * see MouseListenerCollection.fireMouseEvent()
         */
        m_widgetX = m_absoluteX - m_widgetLeft + DOM.getElementPropertyInt(e, "scrollLeft");
        m_widgetY = m_absoluteY - m_widgetTop + DOM.getElementPropertyInt(e, "scrollTop");
    }

    public static boolean isMouseEvent(Event domEvent) {
        return isMouseEvent(DOM.eventGetType(domEvent));
    }

    public static boolean isMouseEvent(int domEventType) {
        return (domEventType & MOUSE_EVENTS) != 0;
    }

    protected int getWidgetLeft() {
        return m_widgetLeft;
    }

    protected int getWidgetTop() {
        return m_widgetTop;
    }

    public int getClientX() {
        return m_clientX;
    }

    public int getClientY() {
        return m_clientY;
    }

    public int getScreenX() {
        return DOM.eventGetScreenX(getDomEvent());
    }

    public int getScreenY() {
        return DOM.eventGetScreenY(getDomEvent());
    }

    public int getWidgetX() {
        return m_widgetX;
    }

    public int getWidgetY() {
        return m_widgetY;
    }

    public Element getFrom() {
        if (getType() != MOUSE_OVER)
            throw new IllegalStateException();

        return DOM.eventGetFromElement(getDomEvent());
    }

    public Element getTo() {
        if (getType() != MOUSE_OUT)
            throw new IllegalStateException();

        return DOM.eventGetToElement(getDomEvent());
    }

    public int getAbsoluteX() {
        return m_absoluteX;
    }

    public int getAbsoluteY() {
        return m_absoluteY;
    }

    @Override
    protected String dumpProperties() {
        return "client(" + m_clientX + ',' + m_clientY + "),widget(" + m_widgetX + ',' + m_widgetY + "),"
                + super.dumpProperties();
    }
}