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/*
* Copyright (c) 2010, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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 (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package javafx.scene.shape;
import com.sun.javafx.collections.TrackableObservableList;
import com.sun.javafx.geom.BaseBounds;
import com.sun.javafx.geom.Path2D;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.javafx.scene.DirtyBits;
import com.sun.javafx.scene.NodeHelper;
import com.sun.javafx.scene.shape.PolygonHelper;
import com.sun.javafx.scene.shape.ShapeHelper;
import com.sun.javafx.sg.prism.NGNode;
import com.sun.javafx.sg.prism.NGPolygon;
import com.sun.javafx.sg.prism.NGShape;
import javafx.collections.ListChangeListener.Change;
import javafx.collections.ObservableList;
import javafx.scene.Node;
import javafx.scene.paint.Paint;
/**
* Creates a polygon, defined by an array of x,y coordinates. The Polygon
* class is similar to the Polyline class, except that the Polyline class
* is not automatically closed.
*
* @since JavaFX 2.0
*/
public class Polygon extends Shape {
static {
PolygonHelper.setPolygonAccessor(new PolygonHelper.PolygonAccessor() {
@Override
public NGNode doCreatePeer(Node node) {
return ((Polygon) node).doCreatePeer();
}
@Override
public void doUpdatePeer(Node node) {
((Polygon) node).doUpdatePeer();
}
@Override
public BaseBounds doComputeGeomBounds(Node node,
BaseBounds bounds, BaseTransform tx) {
return ((Polygon) node).doComputeGeomBounds(bounds, tx);
}
@Override
public com.sun.javafx.geom.Shape doConfigShape(Shape shape) {
return ((Polygon) shape).doConfigShape();
}
});
}
private final Path2D shape = new Path2D();
{
// To initialize the class helper at the begining each constructor of this class
PolygonHelper.initHelper(this);
}
/**
* Creates an empty instance of Polygon.
*/
public Polygon() {
}
/**
* Creates a new instance of Polygon.
* @param points the coordinates of the polygon vertices
*/
public Polygon(double... points) {
if (points != null) {
for (double p : points) {
this.getPoints().add(p);
}
}
}
/**
* Defines the coordinates of the polygon vertices.
*
* @defaultValue empty
*/
private final ObservableList points = new TrackableObservableList<>() {
@Override
protected void onChanged(Change c) {
NodeHelper.markDirty(Polygon.this, DirtyBits.NODE_GEOMETRY);
NodeHelper.geomChanged(Polygon.this);
}
};
/**
* Gets the coordinates of the {@code Polygon} vertices.
* @return An observable list of vertices of this {@code Polygon}
*/
public final ObservableList getPoints() { return points; }
/*
* Note: This method MUST only be called via its accessor method.
*/
private NGNode doCreatePeer() {
return new NGPolygon();
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private BaseBounds doComputeGeomBounds(BaseBounds bounds, BaseTransform tx) {
if (getMode() == NGShape.Mode.EMPTY || getPoints().size() <= 1) {
return bounds.makeEmpty();
}
if (getPoints().size() == 2) {
if (getMode() == NGShape.Mode.FILL || getStrokeType() == StrokeType.INSIDE) {
return bounds.makeEmpty();
}
double upad = getStrokeWidth();
if (getStrokeType() == StrokeType.CENTERED) {
upad /= 2.0f;
}
return computeBounds(bounds, tx, upad, 0.5f,
getPoints().get(0), getPoints().get(1), 0.0f, 0.0f);
} else {
return computeShapeBounds(bounds, tx, ShapeHelper.configShape(this));
}
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private Path2D doConfigShape() {
double p1 = getPoints().get(0);
double p2 = getPoints().get(1);
shape.reset();
shape.moveTo((float)p1, (float)p2);
final int numValidPoints = getPoints().size() & ~1;
for (int i = 2; i < numValidPoints; i += 2) {
p1 = getPoints().get(i); p2 = getPoints().get(i+1);
shape.lineTo((float)p1, (float)p2);
}
shape.closePath();
return shape;
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private void doUpdatePeer() {
if (NodeHelper.isDirty(this, DirtyBits.NODE_GEOMETRY)) {
final int numValidPoints = getPoints().size() & ~1;
float points_array[] = new float[numValidPoints];
for (int i = 0; i < numValidPoints; i++) {
points_array[i] = (float)getPoints().get(i).doubleValue();
}
final NGPolygon peer = NodeHelper.getPeer(this);
peer.updatePolygon(points_array);
}
}
/**
* Returns a string representation of this {@code Polygon} object.
* @return a string representation of this {@code Polygon} object.
*/
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("Polygon[");
String id = getId();
if (id != null) {
sb.append("id=").append(id).append(", ");
}
sb.append("points=").append(getPoints());
sb.append(", fill=").append(getFill());
Paint stroke = getStroke();
if (stroke != null) {
sb.append(", stroke=").append(stroke);
sb.append(", strokeWidth=").append(getStrokeWidth());
}
return sb.append("]").toString();
}
}
