1 |
/*----------------------------------------------------------------------------\ |
2 |
| Range Class | |
3 |
|-----------------------------------------------------------------------------| |
4 |
| Created by Erik Arvidsson | |
5 |
| (http://webfx.eae.net/contact.html#erik) | |
6 |
| For WebFX (http://webfx.eae.net/) | |
7 |
|-----------------------------------------------------------------------------| |
8 |
| Used to model the data used when working with sliders, scrollbars and | |
9 |
| progress bars. Based on the ideas of the javax.swing.BoundedRangeModel | |
10 |
| interface defined by Sun for Java. http://java.sun.com/products/jfc/ | |
11 |
| swingdoc-api-1.0.3/com/sun/java/swing/BoundedRangeModel.html | | |
12 |
|-----------------------------------------------------------------------------| |
13 |
| Copyright (c) 1999 - 2002 Erik Arvidsson | |
14 |
|-----------------------------------------------------------------------------| |
15 |
| This software is provided "as is", without warranty of any kind, express or | |
16 |
| implied, including but not limited to the warranties of merchantability, | |
17 |
| fitness for a particular purpose and noninfringement. In no event shall the | |
18 |
| authors or copyright holders be liable for any claim, damages or other | |
19 |
| liability, whether in an action of contract, tort or otherwise, arising | |
20 |
| from, out of or in connection with the software or the use or other | |
21 |
| dealings in the software. | |
22 |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
23 |
| This software is available under the three different licenses mentioned | |
24 |
| below. To use this software you must chose, and qualify, for one of those. | |
25 |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
26 |
| The WebFX Non-Commercial License http://webfx.eae.net/license.html | |
27 |
| Permits anyone the right to use the software in a non-commercial context | |
28 |
| free of charge. | |
29 |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
30 |
| The WebFX Commercial license http://webfx.eae.net/commercial.html | |
31 |
| Permits the license holder the right to use the software in a commercial | |
32 |
| context. Such license must be specifically obtained, however it's valid for | |
33 |
| any number of implementations of the licensed software. | |
34 |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
35 |
| GPL - The GNU General Public License http://www.gnu.org/licenses/gpl.txt | |
36 |
| Permits anyone the right to use and modify the software without limitations | |
37 |
| as long as proper credits are given and the original and modified source | |
38 |
| code are included. Requires that the final product, software derivate from | |
39 |
| the original source or any software utilizing a GPL component, such as | |
40 |
| this, is also licensed under the GPL license. | |
41 |
|-----------------------------------------------------------------------------| |
42 |
| 2002-10-14 | Original version released | |
43 |
|-----------------------------------------------------------------------------| |
44 |
| Created 2002-10-14 | All changes are in the log above. | Updated 2002-10-14 | |
45 |
\----------------------------------------------------------------------------*/ |
46 |
|
47 |
|
48 |
function Range() { |
49 |
this._value = 0; |
50 |
this._minimum = 0; |
51 |
this._maximum = 100; |
52 |
this._extent = 0; |
53 |
|
54 |
this._isChanging = false; |
55 |
} |
56 |
|
57 |
Range.prototype.setValue = function (value) { |
58 |
value = parseInt(value); |
59 |
if (isNaN(value)) return; |
60 |
if (this._value != value) { |
61 |
if (value + this._extent > this._maximum) |
62 |
this._value = this._maximum - this._extent; |
63 |
else if (value < this._minimum) |
64 |
this._value = this._minimum; |
65 |
else |
66 |
this._value = value; |
67 |
if (!this._isChanging && typeof this.onchange == "function") |
68 |
this.onchange(); |
69 |
} |
70 |
}; |
71 |
|
72 |
Range.prototype.getValue = function () { |
73 |
return this._value; |
74 |
}; |
75 |
|
76 |
Range.prototype.setExtent = function (extent) { |
77 |
if (this._extent != extent) { |
78 |
if (extent < 0) |
79 |
this._extent = 0; |
80 |
else if (this._value + extent > this._maximum) |
81 |
this._extent = this._maximum - this._value; |
82 |
else |
83 |
this._extent = extent; |
84 |
if (!this._isChanging && typeof this.onchange == "function") |
85 |
this.onchange(); |
86 |
} |
87 |
}; |
88 |
|
89 |
Range.prototype.getExtent = function () { |
90 |
return this._extent; |
91 |
}; |
92 |
|
93 |
Range.prototype.setMinimum = function (minimum) { |
94 |
if (this._minimum != minimum) { |
95 |
var oldIsChanging = this._isChanging; |
96 |
this._isChanging = true; |
97 |
|
98 |
this._minimum = minimum; |
99 |
|
100 |
if (minimum > this._value) |
101 |
this.setValue(minimum); |
102 |
if (minimum > this._maximum) { |
103 |
this._extent = 0; |
104 |
this.setMaximum(minimum); |
105 |
this.setValue(minimum) |
106 |
} |
107 |
if (minimum + this._extent > this._maximum) |
108 |
this._extent = this._maximum - this._minimum; |
109 |
|
110 |
this._isChanging = oldIsChanging; |
111 |
if (!this._isChanging && typeof this.onchange == "function") |
112 |
this.onchange(); |
113 |
} |
114 |
}; |
115 |
|
116 |
Range.prototype.getMinimum = function () { |
117 |
return this._minimum; |
118 |
}; |
119 |
|
120 |
Range.prototype.setMaximum = function (maximum) { |
121 |
if (this._maximum != maximum) { |
122 |
var oldIsChanging = this._isChanging; |
123 |
this._isChanging = true; |
124 |
|
125 |
this._maximum = maximum; |
126 |
|
127 |
if (maximum < this._value) |
128 |
this.setValue(maximum - this._extent); |
129 |
if (maximum < this._minimum) { |
130 |
this._extent = 0; |
131 |
this.setMinimum(maximum); |
132 |
this.setValue(this._maximum); |
133 |
} |
134 |
if (maximum < this._minimum + this._extent) |
135 |
this._extent = this._maximum - this._minimum; |
136 |
if (maximum < this._value + this._extent) |
137 |
this._extent = this._maximum - this._value; |
138 |
|
139 |
this._isChanging = oldIsChanging; |
140 |
if (!this._isChanging && typeof this.onchange == "function") |
141 |
this.onchange(); |
142 |
} |
143 |
}; |
144 |
|
145 |
Range.prototype.getMaximum = function () { |
146 |
return this._maximum; |
147 |
}; |