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comparison dwtx/draw2d/PolylineDecoration.d @ 98:95307ad235d9

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Added Draw2d code, still work in progress
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 00:52:14 +0200
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96:b492ba44e44d 98:95307ad235d9
1 /*******************************************************************************
2 * Copyright (c) 2000, 2005 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module dwtx.draw2d.PolylineDecoration;
14
15 import dwt.dwthelper.utils;
16
17 import dwtx.draw2d.geometry.Point;
18 import dwtx.draw2d.geometry.PointList;
19 import dwtx.draw2d.geometry.Transform;
20 import dwtx.draw2d.Polyline;
21 import dwtx.draw2d.RotatableDecoration;
22 import dwtx.draw2d.ColorConstants;
23
24 /**
25 * A decorative Figure intended to be placed on a {@link Polyline}. It has the default
26 * shape of right-pointing triangle.
27 */
28 public class PolylineDecoration
29 : Polyline
30 , RotatableDecoration
31 {
32
33 /** A triangle template_ */
34 public static const PointList TRIANGLE_TIP;
35
36 static this() {
37 TRIANGLE_TIP = new PointList();
38 TRIANGLE_TIP.addPoint(-1, 1);
39 TRIANGLE_TIP.addPoint(0, 0);
40 TRIANGLE_TIP.addPoint(-1, -1);
41 }
42
43 private Point location;
44 private PointList template_;
45 private Transform transform;
46
47 /**
48 * Constructs a PolylineDecoration. Defaults the PolylineDecoration to fill its region
49 * with black.
50 *
51 * @since 2.0
52 */
53 public this() {
54 location = new Point();
55 template_ = TRIANGLE_TIP;
56 transform = new Transform();
57 setBackgroundColor(ColorConstants.black);
58 setScale(7, 3);
59 }
60
61 /**
62 * @see Polyline#getPoints()
63 */
64 public PointList getPoints() {
65 if (points is null) {
66 points = new PointList();
67 for (int i = 0; i < template_.size(); i++)
68 points.addPoint(transform.getTransformed(template_.getPoint(i)));
69 }
70 return points;
71 }
72
73 /**
74 * @see IFigure#setLocation(Point)
75 */
76 public void setLocation(Point p) {
77 points = null;
78 bounds = null;
79 location.setLocation(p);
80 transform.setTranslation(p.x, p.y);
81 }
82
83 /**
84 * Sets the PolylineDecoration's point template_. This template_ is an outline of the
85 * PolylineDecoration's region. (The default value is TRIANGLE_TIP which is a triangle
86 * whose tip is pointing to the right).
87 *
88 * @param pl the template_
89 * @since 2.0
90 */
91 public void setTemplate(PointList pl) {
92 erase();
93 template_ = pl;
94 points = null;
95 bounds = null;
96 repaint();
97 }
98
99 /**
100 * Sets the amount of scaling to be done along X and Y axes on the PolylineDecoration's
101 * template_.
102 *
103 * @param x the x scale
104 * @param y the y scale
105 * @since 2.0
106 */
107 public void setScale(double x, double y) {
108 points = null;
109 bounds = null;
110 transform.setScale(x, y);
111 }
112
113 /**
114 * @see RotatableDecoration#setReferencePoint(Point)
115 */
116 public void setReferencePoint(Point ref_) {
117 Point pt = Point.SINGLETON;
118 pt.setLocation(ref_);
119 pt.negate().translate(location);
120 setRotation(Math.atan2(pt.y, pt.x));
121 }
122
123 /**
124 * Sets the angle by which rotation is to be done on the PolylineDecoration.
125 *
126 * @param angle the angle of rotation
127 * @since 2.0
128 */
129 public void setRotation(double angle) {
130 points = null;
131 bounds = null;
132 transform.setRotation(angle);
133 }
134
135 }