115 lines
3.9 KiB
JavaScript
115 lines
3.9 KiB
JavaScript
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if(!dojo._hasResource["dojox.layout.ScrollPane"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojox.layout.ScrollPane"] = true;
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dojo.provide("dojox.layout.ScrollPane");
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dojo.experimental("dojox.layout.ScrollPane");
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dojo.require("dijit.layout._LayoutWidget");
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dojo.require("dijit._Templated");
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dojo.declare("dojox.layout.ScrollPane",
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[dijit.layout._LayoutWidget,dijit._Templated],
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{
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// summary: A pane that "scrolls" its content based on the mouse poisition inside
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//
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// description:
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// A sizable container that takes it's content's natural size and creates
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// a scroll effect based on the relative mouse position. It is an interesting
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// way to display lists of data, or blocks of content, within a confined
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// space.
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//
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// Horizontal scrolling is supported. Combination scrolling is not.
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//
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// FIXME: need to adust the _line somehow, it stops scrolling
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//
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// example:
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// | <div dojoType="dojox.layout.ScrollPane" style="width:150px height:300px;">
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// | <!-- any height content -->
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// | </div>
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//
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// _line: dojo._Line
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// storage for our top and bottom most scrollpoints
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_line: null,
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// _lo: the height of the visible pane
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_lo: null,
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_offset: 15,
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// orientation: String
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// either "horizontal" or "vertical" for scroll orientation.
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orientation: "vertical",
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templateString:"<div class=\"dojoxScrollWindow\" dojoAttachEvent=\"onmouseenter: _enter, onmouseleave: _leave\">\n <div class=\"dojoxScrollWrapper\" style=\"${style}\" dojoAttachPoint=\"wrapper\" dojoAttachEvent=\"onmousemove: _calc\">\n\t<div class=\"dojoxScrollPane\" dojoAttachPoint=\"containerNode\"></div>\n </div>\n <div dojoAttachPoint=\"helper\" class=\"dojoxScrollHelper\"><span class=\"helperInner\">|</span></div>\n</div>\n",
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layout: function(){
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// summary: calculates required sizes. call this if we add/remove content manually, or reload the content.
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dojo.style(this.wrapper,this._dir,this.domNode.style[this._dir]);
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this._lo = dojo.coords(this.wrapper,true);
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this._size = Math.max(0,(this._vertical ?
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(this.containerNode.scrollHeight - this._lo.h) :
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(this.containerNode.scrollWidth - this._lo.w)
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));
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this._line = new dojo._Line(0-this._offset,this._size+(this._offset*2));
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// share a relative position w the scroll offset via a line
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var u = this._lo[(this._vertical?"h":"w")]
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var size = u * (u / Math.max(1,this._size));
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var center = Math.floor(u - size);
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this._helpLine = new dojo._Line(0,center);
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// size the helper
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dojo.style(this.helper,this._dir,Math.floor(size)+"px");
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},
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postCreate: function(){
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this.inherited(arguments);
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// for the helper
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this._showAnim = dojo._fade({ node:this.helper, end:0.5, duration:350 });
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this._hideAnim = dojo.fadeOut({ node:this.helper, duration: 750 });
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// orientation helper
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this._vertical = (this.orientation == "vertical");
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if(!this._vertical){
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dojo.addClass(this.containerNode,"dijitInline");
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this._edge = "left";
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this._dir = "width";
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}else{
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this._dir = "height";
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this._edge = "top";
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}
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this._hideAnim.play();
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dojo.style(this.wrapper,"overflow","hidden");
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},
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_set: function(/* Float */n){
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// summary: set the pane's scroll offset, and position the virtual scroll helper
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this.wrapper[(this._vertical ? "scrollTop" : "scrollLeft")] = Math.floor(this._line.getValue(n));
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dojo.style(this.helper,this._edge,Math.floor(this._helpLine.getValue(n))+"px");
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},
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_calc: function(/* Event */e){
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// summary: calculate the relative offset of the cursor over the node, and call _set
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this._set(this._vertical ?
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((e.pageY-(this._lo.y))/this._lo.h) :
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((e.pageX-(this._lo.x))/this._lo.w)
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);
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},
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_enter: function(e){
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if(this._hideAnim && this._hideAnim.status()=="playing"){ this._hideAnim.stop(); }
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this._showAnim.play();
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},
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_leave: function(e){
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this._hideAnim.play();
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}
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});
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}
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