30eda4ab5fad8e1433b9260c41c19309a2afcb72
[redakcja.git] / project / static / js / views / split.js
1 /*globals View*/
2
3 // Split view inspired by jQuery Splitter Plugin http://methvin.com/splitter/
4 var SplitView = View.extend({
5   _className: 'SplitView',
6   splitbarClass: 'splitview-splitbar',
7   activeClass: 'splitview-active',
8   overlayClass: 'splitview-overlay',
9   element: null,
10   model: null,
11   zombie: null,
12   leftViewOffset: 0,
13   
14   // Cache
15   _splitbarWidth: 0,
16   
17   init: function(element, model) {
18     this._super(element, model, null);
19     this.element.css('position', 'relative');
20     this._resizingSubviews = false;    
21     
22     this.views = $(">*", this.element[0]).css({
23         position: 'absolute',                     // positioned inside splitter container
24         'z-index': 1,                                           // splitbar is positioned above
25         '-moz-outline-style': 'none',   // don't show dotted outline
26       overflow: 'auto'
27     });
28     
29     this.leftView = $(this.views[0]);
30     this.rightView = $(this.views[1]);
31     
32     this.splitbar = $(this.views[2] || '<div></div>')
33       .insertAfter(this.leftView)
34       .css({
35         position: 'absolute',
36         'user-select': 'none',
37         '-webkit-user-select': 'none',
38         '-khtml-user-select': 'none',
39         '-moz-user-select': 'none',
40         'z-index': 100
41       })
42       .attr('unselectable', 'on')
43       .addClass(this.splitbarClass)
44       .bind('mousedown.splitview', this.beginResize.bind(this));
45     
46     this._splitbarWidth = this.splitbar.outerWidth();
47     
48     // Solomon's algorithm ;-)
49     this.resplit(this.element.width() / 2);
50   },
51     
52   beginResize: function(event) {
53     this.zombie = this.zombie || this.splitbar.clone(false).insertAfter(this.leftView);
54     this.overlay = this.overlay || $('<div></div>').addClass(this.overlayClass).css({
55         position: 'absolute',
56         width: this.element.width(),
57         height: this.element.height(),
58         top: this.element.position().top,
59         left: this.element.position().left
60       }).appendTo(this.element);
61     this.views.css("-webkit-user-select", "none"); // Safari selects A/B text on a move
62     this.splitbar.addClass(this.activeClass);
63     this.leftViewOffset = this.leftView[0].offsetWidth - event.pageX;
64     
65     $(document)
66       .bind('mousemove.splitview', this.resizeChanged.bind(this))
67       .bind('mouseup.splitview', this.endResize.bind(this));
68   },
69   
70   resizeChanged: function(event) {
71     var newPosition = event.pageX + this.leftViewOffset;
72     newPosition = Math.max(0, Math.min(newPosition, this.element.width() - this._splitbarWidth));
73     this.splitbar.css('left', newPosition);
74   },
75
76   endResize: function(event) {
77     var newPosition = event.pageX + this.leftViewOffset;
78     this.zombie.remove();
79     this.zombie = null;
80     this.overlay.remove();
81     this.overlay = null;
82     this.resplit(newPosition);
83
84     $(document)
85       .unbind('mousemove.splitview')
86       .unbind('mouseup.splitview');
87   },
88
89   resized: function(event) {
90     if (!this._resizingSubviews) {
91       this.resplit(Math.min(this.leftView.width(), this.element.width() - this._splitbarWidth));
92     }
93   },
94   
95   resplit: function(newPosition) {
96     newPosition = Math.max(0, Math.min(newPosition, this.element.width() - this._splitbarWidth));
97     this.splitbar.css('left', newPosition);
98     this.leftView.css({
99       left: 0,
100       width: newPosition
101     });
102     this.rightView.css({
103       left: newPosition + this._splitbarWidth,
104       width: this.element.width() - newPosition - this._splitbarWidth
105     });
106     if (!$.browser.msie) {
107       this._resizingSubviews = true;
108                   $(window).trigger('resize');
109                   this._resizingSubviews = false;
110                 }
111   },
112   
113   dispose: function() {
114     this.splitter.unbind('mousedown.splitview');
115     this._super();
116   }
117 });
118