mirror of https://github.com/octoleo/plantuml.git
107 lines
3.5 KiB
Java
107 lines
3.5 KiB
Java
/*
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* Copyright 2003-2004, Franz-Josef Elmer, All rights reserved
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details
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* (http://www.gnu.org/copyleft/lesser.html).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package jcckit.graphic;
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import java.util.Vector;
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/**
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* Container for {@link GraphicalElement GraphicalElements}.
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*
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* @author Franz-Josef Elmer
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*/
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public class GraphicalComposite implements GraphicalElement {
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private final Vector _elements = new Vector();
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private final ClippingShape _clippingShape;
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/**
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* Creates an instance with the specified clipping shape.
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* @param clippingShape Clipping shape or <tt>null</tt> if no clipping.
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*/
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public GraphicalComposite(ClippingShape clippingShape) {
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_clippingShape = clippingShape;
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}
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/**
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* Returns the clipping shape.
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* @return <tt>null</tt> if no clipping should be applied.
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*/
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public ClippingShape getClippingShape() {
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return _clippingShape;
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}
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/**
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* Adds the specified element at the end of the list of elements.
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* @param element Element to be added. <tt>null</tt> is not allowed.
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* @throws NullPointerException if <tt>element == null</tt>
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*/
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public void addElement(GraphicalElement element) {
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if (element == null) {
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throwNullPointerException();
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} else {
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_elements.addElement(element);
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}
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}
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/** Remove all elements. */
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public void removeAllElements() {
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_elements.removeAllElements();
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}
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/**
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* Replaces the specified element at the specified index of
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* the list of elements.
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* @param element New element. <tt>null</tt> is not allowed.
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* @throws NullPointerException if <tt>element == null</tt>
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*/
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public void replaceElementAt(int index, GraphicalElement element) {
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if (element == null) {
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throwNullPointerException();
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} else {
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_elements.setElementAt(element, index);
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}
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}
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private void throwNullPointerException() {
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throw new NullPointerException(
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"A null as an GraphicalElement is not allowed");
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}
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/**
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* Renders all {@link GraphicalElement GraphicalElements} in the sequence
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* they have been added.
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* @param renderer Renderer which implements all renderer interfaces
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* necessary to render the child elements.
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* @throws IllegalArgumentException if <tt>renderer</tt> is not
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* an instance of <tt>GraphicalCompositeRenderer</tt>.
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*/
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public void renderWith(Renderer renderer) {
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if (renderer instanceof GraphicalCompositeRenderer) {
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GraphicalCompositeRenderer r = (GraphicalCompositeRenderer) renderer;
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r.startRendering(this);
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for (int i = 0, n = _elements.size(); i < n; i++) {
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((GraphicalElement) _elements.elementAt(i)).renderWith(r);
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}
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r.finishRendering(this);
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} else {
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throw new IllegalArgumentException(renderer
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+ " does not implements GraphicalCompositeRenderer.");
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}
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}
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}
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