/*
* Copyright (c) 2011, grossmann
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the jo-widgets.org nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package org.jowidgets.spi.impl.controller;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Set;
import org.jowidgets.common.types.Position;
import org.jowidgets.common.widgets.controller.IMouseButtonEvent;
import org.jowidgets.common.widgets.controller.IMouseEvent;
import org.jowidgets.common.widgets.controller.IMouseMotionListener;
import org.jowidgets.common.widgets.controller.IMouseMotionObservable;
import org.jowidgets.util.Assert;
import org.jowidgets.util.event.IObservableCallback;
public class MouseMotionObservable implements IMouseMotionObservable {
private final Set<IMouseMotionListener> listeners;
private final IObservableCallback observableCallback;
public MouseMotionObservable(final IObservableCallback observableCallback) {
Assert.paramNotNull(observableCallback, "observableCallback");
this.listeners = new LinkedHashSet<IMouseMotionListener>();
this.observableCallback = observableCallback;
}
@Override
public void addMouseMotionListener(final IMouseMotionListener listener) {
Assert.paramNotNull(listener, "listener");
listeners.add(listener);
if (listeners.size() == 1) {
observableCallback.onFirstRegistered();
}
}
@Override
public void removeMouseMotionListener(final IMouseMotionListener listener) {
Assert.paramNotNull(listener, "listener");
listeners.remove(listener);
if (listeners.size() == 0) {
observableCallback.onLastUnregistered();
}
}
public final void fireMouseMoved(final Position position) {
fireMouseMoved(new MouseEvent(position));
}
public final void fireMouseMoved(final IMouseEvent event) {
Assert.paramNotNull(event, "event");
for (final IMouseMotionListener listener : new LinkedList<IMouseMotionListener>(listeners)) {
listener.mouseMoved(event);
}
}
public final void fireMouseDragged(final IMouseButtonEvent event) {
Assert.paramNotNull(event, "event");
for (final IMouseMotionListener listener : new LinkedList<IMouseMotionListener>(listeners)) {
listener.mouseDragged(event);
}
}
}