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Diffstat (limited to 'usr/local/www/draglist.js')
-rwxr-xr-x | usr/local/www/draglist.js | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/usr/local/www/draglist.js b/usr/local/www/draglist.js new file mode 100755 index 0000000..a8651ec --- /dev/null +++ b/usr/local/www/draglist.js @@ -0,0 +1,295 @@ +// ---------------------------------------------------------------------------- +// (c) Copyright, DTLink, LLC 1997-2005 +// http://www.dtlink.com +// +// DragList - Drag and Drop Ordered Lists +// +// Javascript Support file for formVista <draglist> fvml tag. +// +// For more information please see: +// +// http://www.formvista.com/otherprojects/draglist.html +// +// For questions or comments please contact us at: +// +// http://www.formvista.com/contact.html +// +// LICENSE: This file is governed by the new BSD license. For more information +// please see the LICENSE.txt file accompanying this package. +// +// REVISION HISTORY: +// +// 2004-11-12 YmL: +// . initial revision. +// +// 2005-05-28 YmL: +// . pulled out of formVista, relicensed and packaged as a standalone implementation. +// +// 2005-06-02 mtmosier: +// . added horizontal dragging support. +// +// ------------------------ + +/** +* constructor for dragList class +*/ + +function fv_dragList( name ) + { + + // name of this dragList. Must match the id of the root DIV tag. + + this.dragListRootId = name; + + // array of item offsets + + this.offsetsX = new Array(); + this.offsetsY = new Array(); + + } + +// ---------------------------------------------- + +/** +* setup the draglist prior to use +* +* @param string orientation defaults to vert. if set to "horz" renders horizontally. +* @param string itemTagName. if null defaults to "div". Can be "span". +*/ + +fv_dragList.prototype.setup = function( orientation, itemTagName ) + { + + var horizontal; + + if ( orientation == "horz" ) + horizontal = true; + else + horizontal = false; + + this.listRoot = document.getElementById( this.dragListRootId ); + this.listItems = this.getListItems( itemTagName ); + + for (var i = 0; i < this.listItems.length; i++) + { + + if ( this.listItems[i] == undefined ) + continue; + + if ( horizontal ) + { + Drag.init(this.listItems[i], null, null, null, 0, 0); + } + else + { + Drag.init(this.listItems[i], null, 0, 0, null, null); + } + + // --------------------------------------------------- + // on drag method + + this.listItems[i].onDrag = function( x, y, thisElem ) + { + + x = thisElem.offsetLeft; + y = thisElem.offsetTop; + + // this is a callback from the dom-drag code. From within this + // function "this" does not refer to the fv_draglist function. + + draglist = getDragList( thisElem ); + + draglist.recalcOffsets( itemTagName ); + + var pos = draglist.getCurrentOffset( thisElem, itemTagName ); + + //var listItems = this.getListItems( itemTagName ); + + // if bottom edge is below top of lower item. + + var testMoveUp; + var testMoveDown; + if ( horizontal ) + { + testMoveUp = (x + draglist.getDivWidth(thisElem) > draglist.offsetsX[pos + 1] + draglist.getDivWidth( draglist.listItems[pos + 1] )); + testMoveDown = x < draglist.offsetsX[pos - 1]; + } + else + { + testMoveUp = (y + draglist.getDivHeight(thisElem) > draglist.offsetsY[pos + 1] + draglist.getDivHeight( draglist.listItems[pos + 1] )); + testMoveDown = y < draglist.offsetsY[pos - 1]; + } + + if (( pos != draglist.listItems.length - 1) && testMoveUp ) + { + draglist.listRoot.removeChild(thisElem); + + if ( pos + 1 == draglist.listItems.length ) + { + draglist.listRoot.appendChild( thisElem ); + } + else + { + draglist.listRoot.insertBefore(thisElem, draglist.listItems[pos+1]); + } + + thisElem.style["top"] = "0px"; + thisElem.style["left"] = "0px"; + } + else if ( pos != 0 && testMoveDown ) + { + draglist.listRoot.removeChild(thisElem); + draglist.listRoot.insertBefore(thisElem, draglist.listItems[pos-1]); + thisElem.style["top"] = "0px"; + thisElem.style["left"] = "0px"; + } + + }; + + this.listItems[i].onDragEnd = function(x,y,thisElem) + { + thisElem.style["top"] = "0px"; + thisElem.style["left"] = "0px"; + } + + } // end of for loop. + + this.recalcOffsets( itemTagName ); + + } // end of setup. + +// ---------------------------------------------- + + +/** +* update the order value fields and submit the form. +*/ + +fv_dragList.prototype.do_submit = function( formName, dragListRootId ) + { + + var listOrderItems = this.listRoot.getElementsByTagName("input"); + + for (var i = 0; i < listOrderItems.length; i++) + { + listOrderItems[i].value = i; + } + + expr = "document." + formName + ".submit()"; + + eval( expr ); + } + +// ---------------------------------------------- +// "Private" methods. +// ---------------------------------------------- + +fv_dragList.prototype.recalcOffsets = function( itemTagName ) + { + var listItems = this.getListItems( itemTagName ); + + for (var i = 0; i < listItems.length; i++) + { + this.offsetsX[i] = listItems[i].offsetLeft; + this.offsetsY[i] = listItems[i].offsetTop; + } + } + +fv_dragList.prototype.getCurrentOffset = function(elem, itemTagName) + { + var listItems = this.getListItems( itemTagName ); + + for (var i = 0; i < listItems.length; i++) + { + if (listItems[i] == elem) + { + return i; + } + } + } + +fv_dragList.prototype.getDivWidth = function(elem) + { + + if (( elem == undefined) || ( elem.offsetWidth == undefined )) + return( 0 ); + + value = elem.offsetWidth; + if (isNaN(value)) + { + value = 0; + } + + return( value ); + } + +fv_dragList.prototype.getDivHeight = function(elem) + { + + if (( elem == undefined) || ( elem.offsetHeight == undefined )) + return( 0 ); + + value = elem.offsetHeight; + if (isNaN(value)) + { + value = 25; + } + + return( value ); + } + +/** +* return list of draggable items +*/ + +fv_dragList.prototype.getListItems = function( itemTagName ) + { + if ( itemTagName == undefined ) + { + itemTagName = "div"; + } + + var listItems = this.listRoot.getElementsByTagName( itemTagName ); + + return( listItems ); + } + +// end of draglist class definition. + +// ------------------------------------- + +/** +* add a new dragList to the list of draglists on this page +* +* This implementatoin supports multiple managed draglists on +* a single page. The index is contained in a global dragListIndex +* array that must be declared in the page. +*/ + +function addDragList( draglist ) + { + dragListIndex[ draglist.dragListRootId ] = draglist; + } + +// ------------------------------------------------------- + +/** +* given a draggable div element, return the draglist it belongs to +* +* @see fv_draglist.prototype.setup +* @todo this should probably be a method inside the draglist class. +*/ + +function getDragList( elem ) + { + + // given a list item return the drag list it belongs to. + + var draglistContainer = elem.parentNode; + + var draglist = dragListIndex[ draglistContainer.id ]; + + return( draglist ); + } + +// END |