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
|
// Copyright 2007 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Represents a gradient to be used with a Graphics implementor.
* @author arv@google.com (Erik Arvidsson)
*/
goog.provide('goog.graphics.LinearGradient');
goog.require('goog.asserts');
goog.require('goog.graphics.Fill');
/**
* Creates an immutable linear gradient fill object.
*
* @param {number} x1 Start X position of the gradient.
* @param {number} y1 Start Y position of the gradient.
* @param {number} x2 End X position of the gradient.
* @param {number} y2 End Y position of the gradient.
* @param {string} color1 Start color of the gradient.
* @param {string} color2 End color of the gradient.
* @param {?number=} opt_opacity1 Start opacity of the gradient, both or neither
* of opt_opacity1 and opt_opacity2 have to be set.
* @param {?number=} opt_opacity2 End opacity of the gradient.
* @constructor
* @extends {goog.graphics.Fill}
*/
goog.graphics.LinearGradient =
function(x1, y1, x2, y2, color1, color2, opt_opacity1, opt_opacity2) {
/**
* Start X position of the gradient.
* @type {number}
* @private
*/
this.x1_ = x1;
/**
* Start Y position of the gradient.
* @type {number}
* @private
*/
this.y1_ = y1;
/**
* End X position of the gradient.
* @type {number}
* @private
*/
this.x2_ = x2;
/**
* End Y position of the gradient.
* @type {number}
* @private
*/
this.y2_ = y2;
/**
* Start color of the gradient.
* @type {string}
* @private
*/
this.color1_ = color1;
/**
* End color of the gradient.
* @type {string}
* @private
*/
this.color2_ = color2;
goog.asserts.assert(
goog.isNumber(opt_opacity1) == goog.isNumber(opt_opacity2),
'Both or neither of opt_opacity1 and opt_opacity2 have to be set.');
/**
* Start opacity of the gradient.
* @type {?number}
* @private
*/
this.opacity1_ = goog.isDef(opt_opacity1) ? opt_opacity1 : null;
/**
* End opacity of the gradient.
* @type {?number}
* @private
*/
this.opacity2_ = goog.isDef(opt_opacity2) ? opt_opacity2 : null;
};
goog.inherits(goog.graphics.LinearGradient, goog.graphics.Fill);
/**
* @return {number} The start X position of the gradient.
*/
goog.graphics.LinearGradient.prototype.getX1 = function() {
return this.x1_;
};
/**
* @return {number} The start Y position of the gradient.
*/
goog.graphics.LinearGradient.prototype.getY1 = function() {
return this.y1_;
};
/**
* @return {number} The end X position of the gradient.
*/
goog.graphics.LinearGradient.prototype.getX2 = function() {
return this.x2_;
};
/**
* @return {number} The end Y position of the gradient.
*/
goog.graphics.LinearGradient.prototype.getY2 = function() {
return this.y2_;
};
/**
* @return {string} The start color of the gradient.
*/
goog.graphics.LinearGradient.prototype.getColor1 = function() {
return this.color1_;
};
/**
* @return {string} The end color of the gradient.
*/
goog.graphics.LinearGradient.prototype.getColor2 = function() {
return this.color2_;
};
/**
* @return {?number} The start opacity of the gradient.
*/
goog.graphics.LinearGradient.prototype.getOpacity1 = function() {
return this.opacity1_;
};
/**
* @return {?number} The end opacity of the gradient.
*/
goog.graphics.LinearGradient.prototype.getOpacity2 = function() {
return this.opacity2_;
};
|
