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
|
//>>built
// wrapped by build app
define("dojox/drawing/manager/Canvas", ["dijit","dojo","dojox"], function(dijit,dojo,dojox){
dojo.provide("dojox.drawing.manager.Canvas");
(function(){
dojox.drawing.manager.Canvas = dojox.drawing.util.oo.declare(
// summary:
// Creates a dojox.gfx.surface to be used for Drawing. Note that
// The 'surface' that Drawing uses is actually a dojox.gfx.group.
// This allows for more versatility.
//
// Called internally from a dojox.Drawing.
//
// Note: Surface creation is asynchrous. Connect to
// onSurfaceReady in Drawing.
//
function(/*Object*/options){
dojo.mixin(this, options);
var dim = dojo.contentBox(this.srcRefNode);
this.height = this.parentHeight = dim.h;
this.width = this.parentWidth = dim.w;
this.domNode = dojo.create("div", {id:"canvasNode"}, this.srcRefNode);
dojo.style(this.domNode, {
width:this.width,
height:"auto"
});
dojo.setSelectable(this.domNode, false);
this.id = this.id || this.util.uid("surface");
console.info("create canvas");
this.gfxSurface = dojox.gfx.createSurface(this.domNode, this.width, this.height);
this.gfxSurface.whenLoaded(this, function(){
setTimeout(dojo.hitch(this, function(){
this.surfaceReady = true;
if(dojo.isIE){
//this.gfxSurface.rawNode.parentNode.id = this.id;
}else if(dojox.gfx.renderer == "silverlight"){
this.id = this.domNode.firstChild.id
}else{
//this.gfxSurface.rawNode.id = this.id;
}
this.underlay = this.gfxSurface.createGroup();
this.surface = this.gfxSurface.createGroup();
this.overlay = this.gfxSurface.createGroup();
this.surface.setTransform({dx:0, dy:0,xx:1,yy:1});
this.gfxSurface.getDimensions = dojo.hitch(this.gfxSurface, "getDimensions");
if(options.callback){
options.callback(this.domNode);
}
}),500);
});
this._mouseHandle = this.mouse.register(this);
},
{
// zoom: [readonly] Number
// The amount the canvas is zoomed
zoom:1,
useScrollbars: true,
baseClass:"drawingCanvas",
resize: function(width, height){
// summary:
// Method used to change size of canvas. Potentially
// called from a container like ContentPane. May be
// called directly.
//
this.parentWidth = width;
this.parentHeight = height;
this.setDimensions(width, height);
},
setDimensions: function(width, height, scrollx, scrolly){
// summary:
// Internal. Changes canvas size and sets scroll position.
// Do not call this, use resize().
//
// changing the size of the surface and setting scroll
// if items are off screen
var sw = this.getScrollWidth(); //+ 10;
this.width = Math.max(width, this.parentWidth);
this.height = Math.max(height, this.parentHeight);
if(this.height>this.parentHeight){
this.width -= sw;
}
if(this.width>this.parentWidth){
this.height -= sw;
}
this.mouse.resize(this.width,this.height);
this.gfxSurface.setDimensions(this.width, this.height);
this.domNode.parentNode.scrollTop = scrolly || 0;
this.domNode.parentNode.scrollLeft = scrollx || 0;
if(this.useScrollbars){
//console.info("Set Canvas Scroll", (this.height > this.parentHeight), this.height, this.parentHeight)
dojo.style(this.domNode.parentNode, {
overflowY: this.height > this.parentHeight ? "scroll" : "hidden",
overflowX: this.width > this.parentWidth ? "scroll" : "hidden"
});
}else{
dojo.style(this.domNode.parentNode, {
overflowY: "hidden",
overflowX: "hidden"
});
}
},
setZoom: function(zoom){
// summary:
// Internal. Zooms canvas in and out.
this.zoom = zoom;
this.surface.setTransform({xx:zoom, yy:zoom});
this.setDimensions(this.width*zoom, this.height*zoom)
},
onScroll: function(){
// summary:
// Event fires on scroll.NOT IMPLEMENTED
},
getScrollOffset: function(){
// summary:
// Get the scroll position of the canvas
return {
top:this.domNode.parentNode.scrollTop,
left:this.domNode.parentNode.scrollLeft
}; // Object
},
getScrollWidth: function(){
// summary:
// Special method used to detect the width (and height)
// of the browser scrollbars. Becomes memoized.
//
var p = dojo.create('div');
p.innerHTML = '<div style="width:50px;height:50px;overflow:hidden;position:absolute;top:0;left:-1000px;"><div style="height:100px;"></div>';
var div = p.firstChild;
dojo.body().appendChild(div);
var noscroll = dojo.contentBox(div).h;
dojo.style(div, "overflow", "scroll");
var scrollWidth = noscroll - dojo.contentBox(div).h;
dojo.destroy(div);
this.getScrollWidth = function(){
return scrollWidth;
};
return scrollWidth; // Object
}
}
);
})();
});
|
