1 | /* |
---|
2 | * Ext JS Library 2.2.1 |
---|
3 | * Copyright(c) 2006-2009, Ext JS, LLC. |
---|
4 | * licensing@extjs.com |
---|
5 | * |
---|
6 | * http://extjs.com/license |
---|
7 | */ |
---|
8 | |
---|
9 | Ext.dd.DragTracker = function(config){ |
---|
10 | Ext.apply(this, config); |
---|
11 | this.addEvents( |
---|
12 | 'mousedown', |
---|
13 | 'mouseup', |
---|
14 | 'mousemove', |
---|
15 | 'dragstart', |
---|
16 | 'dragend', |
---|
17 | 'drag' |
---|
18 | ); |
---|
19 | |
---|
20 | this.dragRegion = new Ext.lib.Region(0,0,0,0); |
---|
21 | |
---|
22 | if(this.el){ |
---|
23 | this.initEl(this.el); |
---|
24 | } |
---|
25 | } |
---|
26 | |
---|
27 | Ext.extend(Ext.dd.DragTracker, Ext.util.Observable, { |
---|
28 | active: false, |
---|
29 | tolerance: 5, |
---|
30 | autoStart: false, |
---|
31 | |
---|
32 | initEl: function(el){ |
---|
33 | this.el = Ext.get(el); |
---|
34 | el.on('mousedown', this.onMouseDown, this, |
---|
35 | this.delegate ? {delegate: this.delegate} : undefined); |
---|
36 | }, |
---|
37 | |
---|
38 | destroy : function(){ |
---|
39 | this.el.un('mousedown', this.onMouseDown, this); |
---|
40 | }, |
---|
41 | |
---|
42 | onMouseDown: function(e, target){ |
---|
43 | if(this.fireEvent('mousedown', this, e) !== false && this.onBeforeStart(e) !== false){ |
---|
44 | this.startXY = this.lastXY = e.getXY(); |
---|
45 | this.dragTarget = this.delegate ? target : this.el.dom; |
---|
46 | e.preventDefault(); |
---|
47 | var doc = Ext.getDoc(); |
---|
48 | doc.on('mouseup', this.onMouseUp, this); |
---|
49 | doc.on('mousemove', this.onMouseMove, this); |
---|
50 | doc.on('selectstart', this.stopSelect, this); |
---|
51 | if(this.autoStart){ |
---|
52 | this.timer = this.triggerStart.defer(this.autoStart === true ? 1000 : this.autoStart, this); |
---|
53 | } |
---|
54 | } |
---|
55 | }, |
---|
56 | |
---|
57 | onMouseMove: function(e, target){ |
---|
58 | e.preventDefault(); |
---|
59 | var xy = e.getXY(), s = this.startXY; |
---|
60 | this.lastXY = xy; |
---|
61 | if(!this.active){ |
---|
62 | if(Math.abs(s[0]-xy[0]) > this.tolerance || Math.abs(s[1]-xy[1]) > this.tolerance){ |
---|
63 | this.triggerStart(); |
---|
64 | }else{ |
---|
65 | return; |
---|
66 | } |
---|
67 | } |
---|
68 | this.fireEvent('mousemove', this, e); |
---|
69 | this.onDrag(e); |
---|
70 | this.fireEvent('drag', this, e); |
---|
71 | }, |
---|
72 | |
---|
73 | onMouseUp: function(e){ |
---|
74 | var doc = Ext.getDoc(); |
---|
75 | doc.un('mousemove', this.onMouseMove, this); |
---|
76 | doc.un('mouseup', this.onMouseUp, this); |
---|
77 | doc.un('selectstart', this.stopSelect, this); |
---|
78 | e.preventDefault(); |
---|
79 | this.clearStart(); |
---|
80 | this.active = false; |
---|
81 | delete this.elRegion; |
---|
82 | this.fireEvent('mouseup', this, e); |
---|
83 | this.onEnd(e); |
---|
84 | this.fireEvent('dragend', this, e); |
---|
85 | }, |
---|
86 | |
---|
87 | triggerStart: function(isTimer){ |
---|
88 | this.clearStart(); |
---|
89 | this.active = true; |
---|
90 | this.onStart(this.startXY); |
---|
91 | this.fireEvent('dragstart', this, this.startXY); |
---|
92 | }, |
---|
93 | |
---|
94 | clearStart : function(){ |
---|
95 | if(this.timer){ |
---|
96 | clearTimeout(this.timer); |
---|
97 | delete this.timer; |
---|
98 | } |
---|
99 | }, |
---|
100 | |
---|
101 | stopSelect : function(e){ |
---|
102 | e.stopEvent(); |
---|
103 | return false; |
---|
104 | }, |
---|
105 | |
---|
106 | onBeforeStart : function(e){ |
---|
107 | |
---|
108 | }, |
---|
109 | |
---|
110 | onStart : function(xy){ |
---|
111 | |
---|
112 | }, |
---|
113 | |
---|
114 | onDrag : function(e){ |
---|
115 | |
---|
116 | }, |
---|
117 | |
---|
118 | onEnd : function(e){ |
---|
119 | |
---|
120 | }, |
---|
121 | |
---|
122 | getDragTarget : function(){ |
---|
123 | return this.dragTarget; |
---|
124 | }, |
---|
125 | |
---|
126 | getDragCt : function(){ |
---|
127 | return this.el; |
---|
128 | }, |
---|
129 | |
---|
130 | getXY : function(constrain){ |
---|
131 | return constrain ? |
---|
132 | this.constrainModes[constrain].call(this, this.lastXY) : this.lastXY; |
---|
133 | }, |
---|
134 | |
---|
135 | getOffset : function(constrain){ |
---|
136 | var xy = this.getXY(constrain); |
---|
137 | var s = this.startXY; |
---|
138 | return [s[0]-xy[0], s[1]-xy[1]]; |
---|
139 | }, |
---|
140 | |
---|
141 | constrainModes: { |
---|
142 | 'point' : function(xy){ |
---|
143 | |
---|
144 | if(!this.elRegion){ |
---|
145 | this.elRegion = this.getDragCt().getRegion(); |
---|
146 | } |
---|
147 | |
---|
148 | var dr = this.dragRegion; |
---|
149 | |
---|
150 | dr.left = xy[0]; |
---|
151 | dr.top = xy[1]; |
---|
152 | dr.right = xy[0]; |
---|
153 | dr.bottom = xy[1]; |
---|
154 | |
---|
155 | dr.constrainTo(this.elRegion); |
---|
156 | |
---|
157 | return [dr.left, dr.top]; |
---|
158 | } |
---|
159 | } |
---|
160 | }); |
---|