/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2016 Neil C Smith.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details.
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* You should have received a copy of the GNU General Public License version 2
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*
*
* Linking this work statically or dynamically with other modules is making a
* combined work based on this work. Thus, the terms and conditions of the GNU
* General Public License cover the whole combination.
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* As a special exception, the copyright holders of this work give you permission
* to link this work with independent modules to produce an executable,
* regardless of the license terms of these independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
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* derived from or based on this work. If you modify this work, you may extend
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* If you do not wish to do so, delete this exception statement from your version.
*
* Please visit http://neilcsmith.net if you need additional information or
* have any questions.
*
*
* This class is derived from code in NetBeans Visual Library.
* Original copyright notice follows.
*
* Copyright 1997-2009 Sun Microsystems, Inc. All rights reserved.
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* General Public License Version 2 only ("GPL") or the Common
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package net.neilcsmith.praxis.live.graph;
import java.awt.Point;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import org.netbeans.api.visual.action.CycleFocusProvider;
import org.netbeans.api.visual.widget.Scene;
import org.netbeans.api.visual.widget.Widget;
/**
*
* @author Neil C Smith (http://neilcsmith.net)
*/
class PraxisCycleFocusProvider implements CycleFocusProvider {
@Override
public boolean switchPreviousFocus(Widget widget) {
Scene scene = widget.getScene();
return scene instanceof PraxisGraphScene && switchFocus((PraxisGraphScene<?>) scene, false);
}
@Override
public boolean switchNextFocus(Widget widget) {
Scene scene = widget.getScene();
return scene instanceof PraxisGraphScene && switchFocus((PraxisGraphScene<?>) scene, true);
}
private boolean switchFocus(PraxisGraphScene<?> scene, boolean forward) {
Object focused = scene.getFocusedObject();
List<Object> nodes = new ArrayList<>(scene.getNodes());
if (nodes.isEmpty()) {
return false;
}
nodes.sort(new LayoutComparator(scene));
int curIdx = nodes.indexOf(focused);
if (forward) {
curIdx++;
if (curIdx >= nodes.size()) {
focused = nodes.get(0);
} else {
focused = nodes.get(curIdx);
}
} else {
curIdx--;
if (curIdx < 0) {
focused = nodes.get(nodes.size() - 1);
} else {
focused = nodes.get(curIdx);
}
}
scene.setFocusedObject(focused);
return true;
}
static class LayoutComparator implements Comparator<Object> {
private final static int TOLERANCE = 100;
private final PraxisGraphScene<?> scene;
LayoutComparator(PraxisGraphScene<?> scene) {
this.scene = scene;
}
@Override
public int compare(Object o1, Object o2) {
if (o1 == o2) {
return 0;
}
Widget w1 = scene.findWidget(o1);
Widget w2 = scene.findWidget(o2);
Point w1p = w1.getLocation();
Point w2p = w2.getLocation();
if (Math.abs(w1p.y - w2p.y) < TOLERANCE) {
return (w1p.x < w2p.x ? -1 : 1);
} else {
return w1p.y < w2p.y ? -1 : 1;
}
}
}
}