1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/**
* $Id: mxCircleLayout.js,v 1.25 2012-08-22 17:26:12 gaudenz Exp $
* Copyright (c) 2006-2010, JGraph Ltd
*/
/**
* Class: mxCircleLayout
*
* Extends <mxGraphLayout> to implement a circluar layout for a given radius.
* The vertices do not need to be connected for this layout to work and all
* connections between vertices are not taken into account.
*
* Example:
*
* (code)
* var layout = new mxCircleLayout(graph);
* layout.execute(graph.getDefaultParent());
* (end)
*
* Constructor: mxCircleLayout
*
* Constructs a new circular layout for the specified radius.
*
* Arguments:
*
* graph - <mxGraph> that contains the cells.
* radius - Optional radius as an int. Default is 100.
*/
function mxCircleLayout(graph, radius)
{
mxGraphLayout.call(this, graph);
this.radius = (radius != null) ? radius : 100;
};
/**
* Extends mxGraphLayout.
*/
mxCircleLayout.prototype = new mxGraphLayout();
mxCircleLayout.prototype.constructor = mxCircleLayout;
/**
* Variable: radius
*
* Integer specifying the size of the radius. Default is 100.
*/
mxCircleLayout.prototype.radius = null;
/**
* Variable: moveCircle
*
* Boolean specifying if the circle should be moved to the top,
* left corner specified by <x0> and <y0>. Default is false.
*/
mxCircleLayout.prototype.moveCircle = false;
/**
* Variable: x0
*
* Integer specifying the left coordinate of the circle.
* Default is 0.
*/
mxCircleLayout.prototype.x0 = 0;
/**
* Variable: y0
*
* Integer specifying the top coordinate of the circle.
* Default is 0.
*/
mxCircleLayout.prototype.y0 = 0;
/**
* Variable: resetEdges
*
* Specifies if all edge points of traversed edges should be removed.
* Default is true.
*/
mxCircleLayout.prototype.resetEdges = true;
/**
* Variable: disableEdgeStyle
*
* Specifies if the STYLE_NOEDGESTYLE flag should be set on edges that are
* modified by the result. Default is true.
*/
mxCircleLayout.prototype.disableEdgeStyle = true;
/**
* Function: execute
*
* Implements <mxGraphLayout.execute>.
*/
mxCircleLayout.prototype.execute = function(parent)
{
var model = this.graph.getModel();
// Moves the vertices to build a circle. Makes sure the
// radius is large enough for the vertices to not
// overlap
model.beginUpdate();
try
{
// Gets all vertices inside the parent and finds
// the maximum dimension of the largest vertex
var max = 0;
var top = null;
var left = null;
var vertices = [];
var childCount = model.getChildCount(parent);
for (var i = 0; i < childCount; i++)
{
var cell = model.getChildAt(parent, i);
if (!this.isVertexIgnored(cell))
{
vertices.push(cell);
var bounds = this.getVertexBounds(cell);
if (top == null)
{
top = bounds.y;
}
else
{
top = Math.min(top, bounds.y);
}
if (left == null)
{
left = bounds.x;
}
else
{
left = Math.min(left, bounds.x);
}
max = Math.max(max, Math.max(bounds.width, bounds.height));
}
else if (!this.isEdgeIgnored(cell))
{
// Resets the points on the traversed edge
if (this.resetEdges)
{
this.graph.resetEdge(cell);
}
if (this.disableEdgeStyle)
{
this.setEdgeStyleEnabled(cell, false);
}
}
}
var r = this.getRadius(vertices.length, max);
// Moves the circle to the specified origin
if (this.moveCircle)
{
left = this.x0;
top = this.y0;
}
this.circle(vertices, r, left, top);
}
finally
{
model.endUpdate();
}
};
/**
* Function: getRadius
*
* Returns the radius to be used for the given vertex count. Max is the maximum
* width or height of all vertices in the layout.
*/
mxCircleLayout.prototype.getRadius = function(count, max)
{
return Math.max(count * max / Math.PI, this.radius);
};
/**
* Function: circle
*
* Executes the circular layout for the specified array
* of vertices and the given radius. This is called from
* <execute>.
*/
mxCircleLayout.prototype.circle = function(vertices, r, left, top)
{
var vertexCount = vertices.length;
var phi = 2 * Math.PI / vertexCount;
for (var i = 0; i < vertexCount; i++)
{
if (this.isVertexMovable(vertices[i]))
{
this.setVertexLocation(vertices[i],
left + r + r * Math.sin(i*phi),
top + r + r * Math.cos(i*phi));
}
}
};
|
