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     this.splitbar = $(this.views[2] || '<div></div>')
  32       .insertAfter(this.leftView)
  33       .css({
  34         position: 'absolute',
  35         'user-select': 'none',
  36         '-webkit-user-select': 'none',
  37         '-khtml-user-select': 'none',
  38         '-moz-user-select': 'none',
  39         'z-index': 100
  40       })
  41       .attr('unselectable', 'on')
  42       .addClass(this.splitbarClass)
  43       .bind('mousedown.splitview', this.beginResize.bind(this));
  44
  45     this._splitbarWidth = this.splitbar.outerWidth();
  46
  47     // Solomon's algorithm ;-)
  48     this.resplit(this.element.width() / 2);
  49   },
  50
  51   beginResize: function(event) {
  52     this.zombie = this.zombie || this.splitbar.clone(false).insertAfter(this.leftView);
  53     this.overlay = this.overlay || $('<div></div>').addClass(this.overlayClass).css({
  54         position: 'absolute',
  55         width: this.element.width(),
  56         height: this.element.height(),
  57         top: this.element.position().top,
  58         left: this.element.position().left
  59       }).appendTo(this.element);
  60     this.views.css("-webkit-user-select", "none"); // Safari selects A/B text on a move
  61     this.splitbar.addClass(this.activeClass);
  62     this.leftViewOffset = this.leftView[0].offsetWidth - event.pageX;
  63
  64     $(document)
  65       .bind('mousemove.splitview', this.resizeChanged.bind(this))
  66       .bind('mouseup.splitview', this.endResize.bind(this));
  67   },
  68
  69   resizeChanged: function(event) {
  70     var newPosition = event.pageX + this.leftViewOffset;
  71     newPosition = Math.max(0, Math.min(newPosition, this.element.width() - this._splitbarWidth));
  72     this.splitbar.css('left', newPosition);
  73   },
  74
  75   endResize: function(event) {
  76     var newPosition = event.pageX + this.leftViewOffset;
  77     this.zombie.remove();
  78     this.zombie = null;
  79     this.overlay.remove();
  80     this.overlay = null;
  81     this.resplit(newPosition);
  82
  83     $(document)
  84       .unbind('mousemove.splitview')
  85       .unbind('mouseup.splitview');
  86   },
  87
  88   resized: function(event) {
  89     if (!this._resizingSubviews) {
  90       this.resplit(Math.min(this.leftView.width(), this.element.width() - this._splitbarWidth));
  91     }
  92   },
  93
  94   resplit: function(newPosition) {
  95     newPosition = Math.max(0, Math.min(newPosition, this.element.width() - this._splitbarWidth));
  96     this.splitbar.css('left', newPosition);
  97     this.leftView.css({
  98       left: 0,
  99       width: newPosition
 100     });
 101     this.rightView.css({
 102       left: newPosition + this._splitbarWidth,
 103       width: this.element.width() - newPosition - this._splitbarWidth
 104     });
 105     if (!$.browser.msie) {
 106       this._resizingSubviews = true;
 107                   $(window).trigger('resize');
 108                   this._resizingSubviews = false;
 109                 }
 110   },
 111
 112   dispose: function() {
 113     this.splitter.unbind('mousedown.splitview');
 114     this._super();
 115   }
 116 });
 117