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
|
//>>built
define("dojox/image/Magnifier", ["dojo/_base/declare", "dojo/dom-construct", "dojo/_base/window", "dojox/gfx", "dojox/gfx/canvas", "./MagnifierLite"], function(declare, construct, window, gfx, canvas, MagnifierLite){
return declare("dojox.image.Magnifier", MagnifierLite, {
// summary:
// Adds magnification on a portion of an image element, using `dojox.gfx`
//
// description:
// An unobtrusive way to add an unstyled overlay
// above the srcNode image element. The overlay/glass is a
// scaled version of the src image (so larger images sized down
// are clearer).
//
// over-ride the _createGlass method to create your custom surface,
// being sure to create an img node on that surface.
_createGlass: function(){
// summary: create the glassNode, and an img on a dojox.gfx surface
// images are hard to make into workable templates, so just add outer overlay
// and skip using dijit._Templated
this.glassNode = construct.create('div', {
style: {
height: this.glassSize + "px",
width: this.glassSize + "px"
},
className: "glassNode"
}, window.body());
this.surfaceNode = construct.create('div', null, this.glassNode);
gfx.switchTo('canvas');
this.surface = canvas.createSurface(this.surfaceNode, this.glassSize, this.glassSize);
this.img = this.surface.createImage({
src: this.domNode.src,
width: this._zoomSize.w,
height: this._zoomSize.h
});
},
_placeGlass: function(e){
// summary: position the overlay centered under the cursor
var x = e.pageX - 2,
y = e.pageY - 2,
xMax = this.offset.x + this.offset.w + 2,
yMax = this.offset.y + this.offset.h + 2
;
// with svg, our mouseout connection to the image surface doesn't
// fire, so we'r have to manually calculate offsets
if(x < this.offset.x || y < this.offset.y || x > xMax || y > yMax){
this._hideGlass();
}else{
this.inherited(arguments);
}
},
_setImage: function(e){
// summary: set the image's offset in the clipping window relative to the mouse position
var xOff = (e.pageX - this.offset.x) / this.offset.w,
yOff = (e.pageY - this.offset.y) / this.offset.h,
x = (this._zoomSize.w * xOff * -1)+(this.glassSize*xOff),
y = (this._zoomSize.h * yOff * -1)+(this.glassSize*yOff)
;
// set the image offset
this.img.setShape({ x: x, y: y });
}
});
});
|
