|
f@0
|
1 /*
|
|
f@0
|
2 CCmI Editor - A Collaborative Cross-Modal Diagram Editing Tool
|
|
f@0
|
3
|
|
f@0
|
4 Copyright (C) 2002 Cay S. Horstmann (http://horstmann.com)
|
|
f@0
|
5 Copyright (C) 2011 Queen Mary University of London (http://ccmi.eecs.qmul.ac.uk/)
|
|
f@0
|
6
|
|
f@0
|
7 This program is free software: you can redistribute it and/or modify
|
|
f@0
|
8 it under the terms of the GNU General Public License as published by
|
|
f@0
|
9 the Free Software Foundation, either version 3 of the License, or
|
|
f@0
|
10 (at your option) any later version.
|
|
f@0
|
11
|
|
f@0
|
12 This program is distributed in the hope that it will be useful,
|
|
f@0
|
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
f@0
|
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
f@0
|
15 GNU General Public License for more details.
|
|
f@0
|
16
|
|
f@0
|
17 You should have received a copy of the GNU General Public License
|
|
f@0
|
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
f@0
|
19 */
|
|
f@0
|
20
|
|
f@0
|
21 package uk.ac.qmul.eecs.ccmi.gui;
|
|
f@0
|
22
|
|
f@0
|
23 import java.awt.Color;
|
|
f@0
|
24 import java.awt.Graphics2D;
|
|
f@0
|
25 import java.awt.Stroke;
|
|
f@0
|
26 import java.awt.geom.Line2D;
|
|
f@0
|
27 import java.awt.geom.Point2D;
|
|
f@0
|
28 import java.awt.geom.Rectangle2D;
|
|
f@0
|
29 import java.awt.geom.RectangularShape;
|
|
f@0
|
30
|
|
f@0
|
31 /**
|
|
f@0
|
32 A grid to which nodes can be "snapped". The
|
|
f@0
|
33 snapping operation moves a point to the nearest grid point.
|
|
f@0
|
34 */
|
|
f@0
|
35 public class Grid
|
|
f@0
|
36 {
|
|
f@0
|
37 /**
|
|
f@0
|
38 Constructs a grid with no grid points.
|
|
f@0
|
39 */
|
|
f@0
|
40 public Grid()
|
|
f@0
|
41 {
|
|
f@0
|
42 setGrid(0, 0);
|
|
f@0
|
43 }
|
|
f@0
|
44
|
|
f@0
|
45 /**
|
|
f@0
|
46 Sets the grid point distances in x- and y-direction
|
|
f@0
|
47 @param x the grid point distance in x-direction
|
|
f@0
|
48 @param y the grid point distance in y-direction
|
|
f@0
|
49 */
|
|
f@0
|
50 public void setGrid(double x, double y)
|
|
f@0
|
51 {
|
|
f@0
|
52 gridx = x;
|
|
f@0
|
53 gridy = y;
|
|
f@0
|
54 }
|
|
f@0
|
55
|
|
f@0
|
56 /**
|
|
f@0
|
57 Draws this grid inside a rectangle.
|
|
f@0
|
58 @param g2 the graphics context
|
|
f@0
|
59 @param bounds the bounding rectangle
|
|
f@0
|
60 */
|
|
f@0
|
61 public void draw(Graphics2D g2, Rectangle2D bounds)
|
|
f@0
|
62 {
|
|
f@0
|
63 Color PALE_BLUE = new Color(0.9F, 0.8F, 0.9F);
|
|
f@0
|
64 Color oldColor = g2.getColor();
|
|
f@0
|
65 g2.setColor(PALE_BLUE);
|
|
f@0
|
66 Stroke oldStroke = g2.getStroke();
|
|
f@0
|
67 for (double x = bounds.getX(); x < bounds.getMaxX(); x += gridx)
|
|
f@0
|
68 g2.draw(new Line2D.Double(x, bounds.getY(), x, bounds.getMaxY()));
|
|
f@0
|
69 for (double y = bounds.getY(); y < bounds.getMaxY(); y += gridy)
|
|
f@0
|
70 g2.draw(new Line2D.Double(bounds.getX(), y, bounds.getMaxX(), y));
|
|
f@0
|
71 g2.setStroke(oldStroke);
|
|
f@0
|
72 g2.setColor(oldColor);
|
|
f@0
|
73 }
|
|
f@0
|
74
|
|
f@0
|
75 /**
|
|
f@0
|
76 Snaps a point to the nearest grid point
|
|
f@0
|
77 @param p the point to snap. After the call, the
|
|
f@0
|
78 coordinates of p are changed so that p falls on the grid.
|
|
f@0
|
79 */
|
|
f@0
|
80 public void snap(Point2D p)
|
|
f@0
|
81 {
|
|
f@0
|
82 double x;
|
|
f@0
|
83 if (gridx == 0)
|
|
f@0
|
84 x = p.getX();
|
|
f@0
|
85 else
|
|
f@0
|
86 x = Math.round(p.getX() / gridx) * gridx;
|
|
f@0
|
87 double y;
|
|
f@0
|
88 if (gridy == 0)
|
|
f@0
|
89 y = p.getY();
|
|
f@0
|
90 else
|
|
f@0
|
91 y = Math.round(p.getY() / gridy) * gridy;
|
|
f@0
|
92
|
|
f@0
|
93 p.setLocation(x, y);
|
|
f@0
|
94 }
|
|
f@0
|
95
|
|
f@0
|
96 /**
|
|
f@0
|
97 Snaps a rectangle to the nearest grid points
|
|
f@0
|
98 @param r the rectangle to snap. After the call, the
|
|
f@0
|
99 coordinates of r are changed so that all of its corners
|
|
f@0
|
100 falls on the grid.
|
|
f@0
|
101 */
|
|
f@0
|
102 public void snap(RectangularShape r)
|
|
f@0
|
103 {
|
|
f@0
|
104 double x;
|
|
f@0
|
105 double w;
|
|
f@0
|
106 w = r.getWidth();
|
|
f@0
|
107 if (gridx == 0)
|
|
f@0
|
108 {
|
|
f@0
|
109 x = r.getX();
|
|
f@0
|
110 }
|
|
f@0
|
111 else
|
|
f@0
|
112 {
|
|
f@0
|
113 x = Math.round(r.getX() / gridx) * gridx;
|
|
f@0
|
114 // w = Math.ceil(r.getWidth() / (2 * gridx)) * (2 * gridx);
|
|
f@0
|
115 }
|
|
f@0
|
116 double y;
|
|
f@0
|
117 double h;
|
|
f@0
|
118 h = r.getHeight();
|
|
f@0
|
119 if (gridy == 0)
|
|
f@0
|
120 {
|
|
f@0
|
121 y = r.getY();
|
|
f@0
|
122 }
|
|
f@0
|
123 else
|
|
f@0
|
124 {
|
|
f@0
|
125 y = Math.round(r.getY() / gridy) * gridy;
|
|
f@0
|
126 // h = Math.ceil(r.getHeight() / (2 * gridy)) * (2 * gridy);
|
|
f@0
|
127 }
|
|
f@0
|
128
|
|
f@0
|
129 r.setFrame(x, y, w, h);
|
|
f@0
|
130 }
|
|
f@0
|
131
|
|
f@0
|
132 private double gridx;
|
|
f@0
|
133 private double gridy;
|
|
f@0
|
134 }
|
