javascript - Moving elements - Udvikleren.dk - Programmering, webdesign og grafik

Tags: javascript
Bruger #14015 @ 07.09.08 22:34
Hej Udviklere.

Nogen som ved/ligger inde med nogle artikler om hvordan man kan flytte elementer, sådan live, lige som på facebook når man skal tilpasse sin profil, hvor man flytter rundt på ting og sager?

Lige som i denne video: http://www.secia.dk/teaser.swf - kig igennem ind til menupunkterne.

Hvor findes der artikler omkring det?
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Bruger #10216 @ 07.09.08 22:59
4.283
http://www.google.dk/search?client=firefox-a&rls=org.mozilla%3Ada%3Aofficial&channel=s&hl=da&q=drag+and+drop+javascript&meta=&btnG=Google-s%C3%B8gning
Bruger #13251 @ 27.09.08 17:40
Hej igen, undskyld jeg ikke har svaret.

Google er altid din ven ;o)
- men her er linket; http://jquery.com (mit foretrukne, resten må du selv finde på google)
Bruger #14015 @ 08.09.08 08:35
Hej Gnu.

Tusind tak, - vidste jo ikke helt hvad jeg skulle søge under.

Jeg brugte det øverste link, men det virker ikke helt?
JScript kode
 <html>
 <head>
 <script type="text/javascript">
 <!--
 // iMouseDown represents the current mouse button state: up or down
 /*
 lMouseState represents the previous mouse button state so that we can
 check for button clicks and button releases:
 
 if(iMouseDown && !lMouseState) // button just clicked!
 if(!iMouseDown && lMouseState) // button just released!
 */
 var mouseOffset = null;
 var iMouseDown  = false;
 var lMouseState = false;
 var dragObject  = null;
 
 // Demo 0 variables
 var DragDrops   = [];
 var curTarget   = null;
 var lastTarget  = null;
 var dragHelper  = null;
 var tempDiv     = null;
 var rootParent  = null;
 var rootSibling = null;
 
 Number.prototype.NaN0=function(){return isNaN(this)?0:this;}
 
 function CreateDragContainer(){
     /*
     Create a new "Container Instance" so that items from one "Set" can not
     be dragged into items from another "Set"
     */
     var cDrag        = DragDrops.length;
     DragDrops[cDrag] = [];
 
     /*
     Each item passed to this function should be a "container".  Store each
     of these items in our current container
     */
     for(var i=0; i<arguments.length; i++){
         var cObj = arguments[i];
         DragDrops[cDrag].push(cObj);
         cObj.setAttribute('DropObj', cDrag);
 
         /*
         Every top level item in these containers should be draggable.  Do this
         by setting the DragObj attribute on each item and then later checking
         this attribute in the mouseMove function
         */
         for(var j=0; j<cObj.childNodes.length; j++){
 
             // Firefox puts in lots of #text nodes...skip these
             if(cObj.childNodes[j].nodeName=='#text') continue;
 
             cObj.childNodes[j].setAttribute('DragObj', cDrag);
         }
     }
 }
 
 function mouseMove(ev){
     ev         = ev || window.event;
 
     /*
     We are setting target to whatever item the mouse is currently on
 
     Firefox uses event.target here, MSIE uses event.srcElement
     */
     var target   = ev.target || ev.srcElement;
     var mousePos = mouseCoords(ev);
 
     // mouseOut event - fires if the item the mouse is on has changed
     if(lastTarget && (target!==lastTarget)){
         // reset the classname for the target element
         var origClass = lastTarget.getAttribute('origClass');
         if(origClass) lastTarget.className = origClass;
     }
 
     /*
     dragObj is the grouping our item is in (set from the createDragContainer function).
     if the item is not in a grouping we ignore it since it can't be dragged with this
     script.
     */
     var dragObj = target.getAttribute('DragObj');
 
      // if the mouse was moved over an element that is draggable
     if(dragObj!=null){
 
         // mouseOver event - Change the item's class if necessary
         if(target!=lastTarget){
             var oClass = target.getAttribute('overClass');
             if(oClass){
                 target.setAttribute('origClass', target.className);
                 target.className = oClass;
             }
         }
 
         // if the user is just starting to drag the element
         if(iMouseDown && !lMouseState){
             // mouseDown target
             curTarget     = target;
 
             // Record the mouse x and y offset for the element
             rootParent    = curTarget.parentNode;
             rootSibling   = curTarget.nextSibling;
 
             mouseOffset   = getMouseOffset(target, ev);
 
             // We remove anything that is in our dragHelper DIV so we can put a new item in it.
             for(var i=0; i<dragHelper.childNodes.length; i++) dragHelper.removeChild(dragHelper.childNodes[i]);
 
             // Make a copy of the current item and put it in our drag helper.
             dragHelper.appendChild(curTarget.cloneNode(true));
             dragHelper.style.display = 'block';
 
             // set the class on our helper DIV if necessary
             var dragClass = curTarget.getAttribute('dragClass');
             if(dragClass){
                 dragHelper.firstChild.className = dragClass;
             }
 
             // disable dragging from our helper DIV (it's already being dragged)
             dragHelper.firstChild.removeAttribute('DragObj');
 
             /*
             Record the current position of all drag/drop targets related
             to the element.  We do this here so that we do not have to do
             it on the general mouse move event which fires when the mouse
             moves even 1 pixel.  If we don't do this here the script
             would run much slower.
             */
             var dragConts = DragDrops[dragObj];
 
             /*
             first record the width/height of our drag item.  Then hide it since
             it is going to (potentially) be moved out of its parent.
             */
             curTarget.setAttribute('startWidth',  parseInt(curTarget.offsetWidth));
             curTarget.setAttribute('startHeight', parseInt(curTarget.offsetHeight));
             curTarget.style.display  = 'none';
 
             // loop through each possible drop container
             for(var i=0; i<dragConts.length; i++){
                 with(dragConts[i]){
                     var pos = getPosition(dragConts[i]);
 
                     /*
                     save the width, height and position of each container.
 
                     Even though we are saving the width and height of each
                     container back to the container this is much faster because
                     we are saving the number and do not have to run through
                     any calculations again.  Also, offsetHeight and offsetWidth
                     are both fairly slow.  You would never normally notice any
                     performance hit from these two functions but our code is
                     going to be running hundreds of times each second so every
                     little bit helps!
 
                     Note that the biggest performance gain here, by far, comes
                     from not having to run through the getPosition function
                     hundreds of times.
                     */
                     setAttribute('startWidth',  parseInt(offsetWidth));
                     setAttribute('startHeight', parseInt(offsetHeight));
                     setAttribute('startLeft',   pos.x);
                     setAttribute('startTop',    pos.y);
                 }
 
                 // loop through each child element of each container
                 for(var j=0; j<dragConts[i].childNodes.length; j++){
                     with(dragConts[i].childNodes[j]){
                         if((nodeName=='#text') || (dragConts[i].childNodes[j]==curTarget)) continue;
 
                         var pos = getPosition(dragConts[i].childNodes[j]);
 
                         // save the width, height and position of each element
                         setAttribute('startWidth',  parseInt(offsetWidth));
                         setAttribute('startHeight', parseInt(offsetHeight));
                         setAttribute('startLeft',   pos.x);
                         setAttribute('startTop',    pos.y);
                     }
                 }
             }
         }
     }
 
     // If we get in here we are dragging something
     if(curTarget){
         // move our helper div to wherever the mouse is (adjusted by mouseOffset)
         dragHelper.style.top  = mousePos.y - mouseOffset.y;
         dragHelper.style.left = mousePos.x - mouseOffset.x;
 
         var dragConts  = DragDrops[curTarget.getAttribute('DragObj')];
         var activeCont = null;
 
         var xPos = mousePos.x - mouseOffset.x + (parseInt(curTarget.getAttribute('startWidth')) /2);
         var yPos = mousePos.y - mouseOffset.y + (parseInt(curTarget.getAttribute('startHeight'))/2);
 
         // check each drop container to see if our target object is "inside" the container
         for(var i=0; i<dragConts.length; i++){
             with(dragConts[i]){
                 if(((getAttribute('startLeft'))                               < xPos) &&
                     ((getAttribute('startTop'))                                < yPos) &&
                     ((getAttribute('startLeft') + getAttribute('startWidth'))  > xPos) &&
                     ((getAttribute('startTop')  + getAttribute('startHeight')) > yPos)){
 
                         /*
                         our target is inside of our container so save the container into
                         the activeCont variable and then exit the loop since we no longer
                         need to check the rest of the containers
                         */
                         activeCont = dragConts[i];
 
                         // exit the for loop
                         break;
                 }
             }
         }
 
         // Our target object is in one of our containers.  Check to see where our div belongs
         if(activeCont){
             // beforeNode will hold the first node AFTER where our div belongs
             var beforeNode = null;
 
             // loop through each child node (skipping text nodes).
             for(var i=activeCont.childNodes.length-1; i>=0; i--){
                 with(activeCont.childNodes[i]){
                     if(nodeName=='#text') continue;
 
                     // if the current item is "After" the item being dragged
                     if(
                         curTarget != activeCont.childNodes[i]                              &&
                         ((getAttribute('startLeft') + getAttribute('startWidth'))  > xPos) &&
                         ((getAttribute('startTop')  + getAttribute('startHeight')) > yPos)){
                             beforeNode = activeCont.childNodes[i];
                     }
                 }
             }
 
             // the item being dragged belongs before another item
             if(beforeNode){
                 if(beforeNode!=curTarget.nextSibling){
                     activeCont.insertBefore(curTarget, beforeNode);
                 }
 
             // the item being dragged belongs at the end of the current container
             } else {
                 if((curTarget.nextSibling) || (curTarget.parentNode!=activeCont)){
                     activeCont.appendChild(curTarget);
                 }
             }
 
             // make our drag item visible
             if(curTarget.style.display!=''){
                 curTarget.style.display  = '';
             }
         } else {
 
             // our drag item is not in a container, so hide it.
             if(curTarget.style.display!='none'){
                 curTarget.style.display  = 'none';
             }
         }
     }
 
     // track the current mouse state so we can compare against it next time
     lMouseState = iMouseDown;
 
     // mouseMove target
     lastTarget  = target;
 
     // track the current mouse state so we can compare against it next time
     lMouseState = iMouseDown;
 
     // this helps prevent items on the page from being highlighted while dragging
     return false;
 }
 
 function mouseUp(ev){
     if(curTarget){
         // hide our helper object - it is no longer needed
         dragHelper.style.display = 'none';
 
         // if the drag item is invisible put it back where it was before moving it
         if(curTarget.style.display == 'none'){
             if(rootSibling){
                 rootParent.insertBefore(curTarget, rootSibling);
             } else {
                 rootParent.appendChild(curTarget);
             }
         }
 
         // make sure the drag item is visible
         curTarget.style.display = '';
     }
     curTarget  = null;
     iMouseDown = false;
 }
 
 function mouseDown(){
     iMouseDown = true;
     if(lastTarget){
         return false;
     }
 }
 
 document.onmousemove = mouseMove;
 document.onmousedown = mouseDown;
 document.onmouseup   = mouseUp;
 
 window.onload = function(){
     // Create our helper object that will show the item while dragging
     dragHelper = document.createElement('DIV');
     dragHelper.style.cssText = 'position:absolute;display:none;';
         
     CreateDragContainer(
         document.getElementById('DragContainer1'),
         document.getElementById('DragContainer2'),
         document.getElementById('DragContainer3')
     );
 
     document.body.appendChild(dragHelper);
 }
 //-->
 </script>
 </head>
 <body>
 
 <div class="DragContainer" id="DragContainer1">
     <div class="DragBox" id="Item1"  overClass="OverDragBox" dragClass="DragDragBox">Item #1</div>
     <div class="DragBox" id="Item2"  overClass="OverDragBox" dragClass="DragDragBox">Item #2</div>
     <div class="DragBox" id="Item3"  overClass="OverDragBox" dragClass="DragDragBox">Item #3</div>
     <div class="DragBox" id="Item4"  overClass="OverDragBox" dragClass="DragDragBox">Item #4</div>
 </div>
 <div class="DragContainer" id="DragContainer2">
     <div class="DragBox" id="Item5"  overClass="OverDragBox" dragClass="DragDragBox">Item #5</div>
     <div class="DragBox" id="Item6"  overClass="OverDragBox" dragClass="DragDragBox">Item #6</div>
     <div class="DragBox" id="Item7"  overClass="OverDragBox" dragClass="DragDragBox">Item #7</div>
     <div class="DragBox" id="Item8"  overClass="OverDragBox" dragClass="DragDragBox">Item #8</div>
 </div>
 <div class="DragContainer" id="DragContainer3">
     <div class="DragBox" id="Item9"  overClass="OverDragBox" dragClass="DragDragBox">Item #9</div>
     <div class="DragBox" id="Item10" overClass="OverDragBox" dragClass="DragDragBox">Item #10</div>
     <div class="DragBox" id="Item11" overClass="OverDragBox" dragClass="DragDragBox">Item #11</div>
     <div class="DragBox" id="Item12" overClass="OverDragBox" dragClass="DragDragBox">Item #12</div>
 </div>
 </body>
 </html>
Den kan ikke flytte elementerne ?
Bruger #13251 @ 22.09.08 21:43
Hej Mattias.

Jeg ville bruge et Javascript library (Prototype, jQuery, Mochikit, Yahoo.UI).

Det sparer dig for kode, og tid.

|x|c0rtz ;o)
Bruger #14015 @ 23.09.08 21:00
Hej Mikkel.

Hvad mener du?

Link?
..

er helt væk
Moving elements

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