/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.isis.viewer.dnd.interaction;
import org.apache.isis.core.commons.util.ToString;
import org.apache.isis.viewer.dnd.drawing.Location;
import org.apache.isis.viewer.dnd.drawing.Offset;
import org.apache.isis.viewer.dnd.drawing.Padding;
import org.apache.isis.viewer.dnd.view.InternalDrag;
import org.apache.isis.viewer.dnd.view.View;
import org.apache.isis.viewer.dnd.view.Viewer;
public class SimpleInternalDrag extends DragImpl implements InternalDrag {
private final Location location;
// TODO replace Location with Offset
private final Location offset;
private final View view;
/**
* Creates a new drag event. The source view has its pickup(), and then,
* exited() methods called on it. The view returned by the pickup method
* becomes this event overlay view, which is moved continuously so that it
* tracks the pointer,
*
* @param view
* the view over which the pointer was when this event started
* @param location
* the location within the viewer (the Frame/Applet/Window etc)
*
* TODO combine the two constructors
*/
public SimpleInternalDrag(final View view, final Location location) {
this.view = view;
this.location = new Location(location);
offset = view.getAbsoluteLocation();
final Padding targetPadding = view.getPadding();
final Padding containerPadding = view.getView().getPadding();
offset.add(containerPadding.getLeft() - targetPadding.getLeft(), containerPadding.getTop() - targetPadding.getTop());
this.location.subtract(offset);
}
public SimpleInternalDrag(final View view, final Offset off) {
this.view = view;
location = new Location();
offset = new Location(off.getDeltaX(), off.getDeltaY());
final Padding targetPadding = view.getPadding();
final Padding containerPadding = view.getView().getPadding();
offset.add(containerPadding.getLeft() - targetPadding.getLeft(), containerPadding.getTop() - targetPadding.getTop());
this.location.subtract(offset);
}
@Override
public void cancel(final Viewer viewer) {
view.dragCancel(this);
}
@Override
public void drag(final View target, final Location location, final int mods) {
this.location.setX(location.getX());
this.location.setY(location.getY());
this.location.subtract(offset);
view.drag(this);
}
@Override
public void end(final Viewer viewer) {
view.dragTo(this);
}
/**
* Gets the location of the pointer relative to the view.
*/
@Override
public Location getLocation() {
return new Location(location);
}
@Override
public View getOverlay() {
return null;
}
@Override
public String toString() {
final ToString s = new ToString(this, super.toString());
s.append("location", location);
s.append("relative", getLocation());
return s.toString();
}
}