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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
|
/*
Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
dojo._xdResourceLoaded(function(dojo, dijit, dojox){
return {depends: [["provide", "dojox.drawing.util.common"],
["require", "dojox.math.round"]],
defineResource: function(dojo, dijit, dojox){if(!dojo._hasResource["dojox.drawing.util.common"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.drawing.util.common"] = true;
dojo.provide("dojox.drawing.util.common");
dojo.require("dojox.math.round");
(function(){
var uidMap = {};
var start = 0;
dojox.drawing.util.common = {
// summary:
// A collection of common methods used for DojoX Drawing.
// This singleton is accessible in most Drawing classes
// as this.util
//
// NOTE:
// A lot of functions use a EventObject
// as an argument. An attempt was made to accept
// either that object or a list of numbers. That wasn't
// finished (it didn't work well in all cases) but is
// likely to happen in the future.
// In cases where you are not sending a Mouse object,
// form your argument like so:
// var obj = {
// start:{
// x:Number, // start x
// y:Number // start y
// },
// x: Number, // end x
// y:Number // end y
// }
//
//
radToDeg: function(/*Numer*/n){
// summary:
// Convert the passed number to degrees.
return (n*180)/Math.PI; // Number
},
degToRad: function(/*Numer*/n){
// summary:
// Convert the passed number to radians.
return (n*Math.PI)/180; // Number
},
angle: function(/*EventObject*/obj, /* ? Float */snap){
// summary:
// Return angle based on mouse object
// arguments:
// obj: EventObject
// Manager.Mouse event.
// snap: Float
// Returns nearest angle within snap limits
//
//obj = this.argsToObj.apply(this, arguments);
if(snap){
snap = snap/180;
var radians = this.radians(obj),
seg = Math.PI * snap,
rnd = dojox.math.round(radians/seg),
new_radian = rnd*seg;
return dojox.math.round(this.radToDeg(new_radian)); // Whole Number
}else{
return this.radToDeg(this.radians(obj)); // Float
}
},
oppAngle: function(/*Angle*/ang){
(ang+=180) > 360 ? ang = ang - 360 : ang;
return ang;
},
radians: function(/*EventObject*/o){
// summary:
// Return the radians derived from the coordinates
// in the Mouse object.
//
//var o = this.argsToObj.apply(this, arguments);
return Math.atan2(o.start.y-o.y,o.x-o.start.x);
},
length: function(/*EventObject*/o){
// summary:
// Return the length derived from the coordinates
// in the Mouse object.
//
return Math.sqrt(Math.pow(o.start.x-o.x, 2)+Math.pow(o.start.y-o.y, 2));
},
lineSub: function(/*Number*/x1, /*Number*/y1, /*Number*/x2, /*Number*/y2, /*Number*/amt){
// summary:
// Subtract an amount from a line
// description:
// x1,y1,x2,y2 represents the Line. 'amt' represents the amount
// to subtract from it.
//
var len = this.distance(this.argsToObj.apply(this, arguments));
len = len < amt ? amt : len;
var pc = (len-amt)/len;
var x = x1 - (x1-x2) * pc;
var y = y1 - (y1-y2) * pc;
return {x:x, y:y}; // Object
},
argsToObj: function(){
// summary:
// Attempts to determine in a Mouse Object
// was passed or indiviual numbers. Returns
// an object.
//
var a = arguments;
if(a.length < 4){ return a[0]; }
return {
start:{
x:a[0],
y:a[1]
},
x:a[2],
y:a[3]//,
//snap:a[4]
}; // Object
},
distance: function(/*EventObject or x1,y1,x2,y2*/){
// summary:
// Return the length derived from the coordinates
// in the Mouse object. Different from util.length
// in that this always returns an absolute value.
//
var o = this.argsToObj.apply(this, arguments);
return Math.abs(Math.sqrt(Math.pow(o.start.x-o.x, 2)+Math.pow(o.start.y-o.y, 2))); // Number
},
slope:function(/*Object*/p1, /*Object*/p2){
// summary:
// Given two poits of a line, returns the slope.
if(!(p1.x-p2.x)){ return 0; }
return ((p1.y-p2.y)/(p1.x-p2.x)); // Number
},
pointOnCircle: function(/*Number*/cx, /*Number*/cy, /*Number*/radius, /*Number*/angle){
// summary:
// A *very* helpful method. If you know the center
// (or starting) point, length and angle, find the
// x,y point at the end of that line.
//
var radians = angle * Math.PI / 180.0;
var x = radius * Math.cos(radians);
var y = radius * Math.sin(radians);
return {
x:cx+x,
y:cy-y
}; // Object
},
constrainAngle: function(/*EventObject*/obj, /*Number*/min, /*Number*/max){
// summary:
// Ensures the angle in the Mouse Object is within the
// min and max limits. If not one of those limits is used.
// Returns an x,y point for the angle used.
//
var angle = this.angle(obj);
if(angle >= min && angle <= max){
return obj; // Object
}
var radius = this.length(obj);
var new_angle = angle > max ? max : min - angle < 100 ? min : max;
return this.pointOnCircle(obj.start.x,obj.start.y,radius, new_angle); // Object
},
snapAngle: function(/*EventObject*/obj, /*Float*/ca){
// summary:
// Snaps a line to the nearest angle
// obj: Mouse object (see dojox.drawing.Mouse)
// ca: Fractional amount to snap to
// A decimal number fraction of a half circle
// .5 would snap to 90 degrees
// .25 would snap to 45 degrees
// .125 would snap to 22.5 degrees, etc.
//
var radians = this.radians(obj),
radius = this.length(obj),
seg = Math.PI * ca,
rnd = Math.round(radians/seg),
new_radian = rnd*seg,
new_angle = this.radToDeg(new_radian),
pt = this.pointOnCircle(obj.start.x,obj.start.y,radius,new_angle);
return pt; // Object
},
// helpers
idSetStart: function(num){
start=num;
},
uid: function(/* ? String */str){
// summary:
// Creates a unique ID.
// arguments:
// str: String
// If provided, kept in a map, incremented
// and used in the id. Otherwise 'shape' is used.
//
str = str || "shape";
uidMap[str] = uidMap[str]===undefined ? start : uidMap[str] + 1;
return str + uidMap[str]; // String
},
abbr: function(type){
// summary:
// Converts a namespace (typically a tool or a stencil) into
// an abbreviation
return type.substring(type.lastIndexOf(".")+1).charAt(0).toLowerCase()
+ type.substring(type.lastIndexOf(".")+2);
},
mixin: function(o1, o2){
// TODO: make faster
//return dojo.mixin(dojo.clone(o1), dojo.clone(o2));
},
objects:{}, //private?
register: function(/*Object*/obj){
// summary:
// Since util is the only Singleton in Drawing (besides
// keys) it is used to help connect the Drawing object
// the Toolbar. Since multiple drawings can be on one
// page, this function serves a little more use than
// on first apearance.
this.objects[obj.id] = obj;
},
byId: function(/*String*/id){
// summary:
// Get an object that was registered with util.register
//
return this.objects[id];
},
attr: function(/* Object */ elem, /* property */ prop, /* ? value */ value, squelchErrors){
// summary:
// Helper function to attach attributes to SVG and VML raw nodes.
//
if(!elem){ return false; }
try{
// util is a crappy check, but we need to tell the diff
// between a Drawing shape and a GFX shape
if(elem.shape && elem.util){
elem = elem.shape;
}
if(!value && prop=="id" && elem.target){
var n = elem.target;
while(!dojo.attr(n, "id")){
n = n.parentNode;
}
return dojo.attr(n, "id");
}
if(elem.rawNode || elem.target){
var args = Array.prototype.slice.call(arguments);
args[0] = elem.rawNode || elem.target;
return dojo.attr.apply(dojo, args);
}
return dojo.attr(elem, "id");
}catch(e){
if(!squelchErrors){
// For debugging only. These errors actually cause errors in IE's console
//console.error("BAD ATTR: prop:", prop, "el:", elem)
//console.error(e)
//console.trace();
}
return false;
}
}
};
})();
}
}};});
|
