CollaboramaSource: ajaxGroup.dragableBoxesJS [edit]
/************************************************************************************************************
(C) www.dhtmlgoodies.com, January 2006
This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.
Terms of use:
You are free to use this script as long as the copyright message is kept intact. However, you may not
redistribute, sell or repost it without our permission.
Thank you!
www.dhtmlgoodies.com
Alf Magne Kalleland
************************************************************************************************************/
var rectangleBorderWidth = 2; // Used to set correct size of the rectangle with red dashed border
var useRectangle = true;
var autoScrollSpeed = 4; // Autoscroll speed - Higher = faster
/* Don't change anything below here */
var dragableElementsParentBox;
var opera = navigator.appVersion.indexOf('Opera')>=0?true:false;
var rectangleDiv = false;
var insertionMarkerDiv = false;
var mouse_x;
var mouse_y;
var el_x;
var el_y;
var dragDropTimer = -1; // -1 = no drag, 0-9 = initialization in progress, 10 = dragging
var dragObject = false;
var dragObjectNextObj = false;
var dragableObjectArray = new Array();
var destinationObj = false;
var currentDest = false;
var allowRectangleMove = true;
var insertionMarkerLine;
var dragDropMoveLayer;
var autoScrollActive = false;
var documentHeight = false;
var documentScrollHeight = false;
var dragableAreaWidth = false;
function getTopPos(inputObj)
{
var returnValue = inputObj.offsetTop;
while((inputObj = inputObj.offsetParent) != null){
if(inputObj.tagName!='HTML')returnValue += inputObj.offsetTop;
}
return returnValue;
}
function getLeftPos(inputObj)
{
var returnValue = inputObj.offsetLeft;
while((inputObj = inputObj.offsetParent) != null){
if(inputObj.tagName!='HTML')returnValue += inputObj.offsetLeft;
}
return returnValue;
}
function cancelSelectionEvent()
{
if(dragDropTimer>=0)return false;
return true;
}
function getObjectFromPosition(x,y)
{
var height = dragObject.offsetHeight;
var width = dragObject.offsetWidth;
var indexCurrentDragObject=-5;
for(var no=0;no<dragableObjectArray.length;no++){
ref = dragableObjectArray[no];
if(ref['obj']==dragObject)indexCurrentDragObject=no;
if(no<dragableObjectArray.length-1 && dragableObjectArray[no+1]['obj']==dragObject)indexCurrentDragObject=no+1;
if(ref['obj']==dragObject && useRectangle)continue;
if(x > ref['left'] && y>ref['top'] && x<(ref['left'] + (ref['width']/2)) && y<(ref['top'] + ref['height'])){
if(!useRectangle && dragableObjectArray[no]['obj']==dragObject)return 'self';
if(indexCurrentDragObject==(no-1))return 'self';
return Array(dragableObjectArray[no],no);
}
if(x > (ref['left'] + (ref['width']/2)) && y>ref['top'] && x<(ref['left'] + ref['width']) && y<(ref['top'] + ref['height'])){
if(no<dragableObjectArray.length-1){
if(no==indexCurrentDragObject || (no==indexCurrentDragObject-1)){
return 'self';
}
if(dragableObjectArray[no]['obj']!=dragObject){
return Array(dragableObjectArray[no+1],no+1);
}else{
if(!useRectangle)return 'self';
if(no<dragableObjectArray.length-2)return Array(dragableObjectArray[no+2],no+2);
}
}else{
if(dragableObjectArray[dragableObjectArray.length-1]['obj']!=dragObject)return 'append';
}
}
if(no<dragableObjectArray.length-1){
if(x > (ref['left'] + ref['width']) && y>ref['top'] && y<(ref['top'] + ref['height']) && y<dragableObjectArray[no+1]['top']){
return Array(dragableObjectArray[no+1],no+1);
}
}
}
if(x>ref['left'] && y>(ref['top'] + ref['height']))return 'append';
return false;
}
function initDrag(e)
{
if(document.all)e = event;
mouse_x = e.clientX;
mouse_y = e.clientY;
if(!documentScrollHeight)documentScrollHeight = document.documentElement.scrollHeight + 100;
el_x = getLeftPos(this)/1;
el_y = getTopPos(this)/1;
dragObject = this;
if(useRectangle){
rectangleDiv.style.width = this.clientWidth - (rectangleBorderWidth*2) +'px';
rectangleDiv.style.height = this.clientHeight - (rectangleBorderWidth*2) +'px';
rectangleDiv.className = this.className;
}else{
insertionMarkerLine.style.width = '6px';
}
dragDropTimer = 0;
dragObjectNextObj = false;
if(this.nextSibling){
dragObjectNextObj = this.nextSibling;
if(!dragObjectNextObj.tagName)dragObjectNextObj = dragObjectNextObj.nextSibling;
}
initDragTimer();
return false;
}
function initDragTimer()
{
if(dragDropTimer>=0 && dragDropTimer<10){
dragDropTimer++;
setTimeout('initDragTimer()',5);
return;
}
if(dragDropTimer==10){
if(useRectangle){
dragObject.style.opacity = 0.5;
dragObject.style.filter = 'alpha(opacity=50)';
dragObject.style.cursor = 'default';
}else{
var newObject = dragObject.cloneNode(true);
dragDropMoveLayer.appendChild(newObject);
}
}
}
function autoScroll(direction,yPos)
{
if(document.documentElement.scrollHeight>documentScrollHeight && direction>0)return;
window.scrollBy(0,direction);
if(direction<0){
if(document.documentElement.scrollTop>0){
mouse_y = mouse_y - direction;
if(useRectangle){
dragObject.style.top = (el_y - mouse_y + yPos) + 'px';
}else{
dragDropMoveLayer.style.top = (el_y - mouse_y + yPos) + 'px';
}
}else{
autoScrollActive = false;
}
}else{
if(yPos>(documentHeight-50)){
mouse_y = mouse_y - direction;
if(useRectangle){
dragObject.style.top = (el_y - mouse_y + yPos) + 'px';
}else{
dragDropMoveLayer.style.top = (el_y - mouse_y + yPos) + 'px';
}
}else{
autoScrollActive = false;
}
}
if(autoScrollActive)setTimeout('autoScroll('+direction+',' + yPos + ')',5);
}
function moveDragableElement(e)
{
if(document.all)e = event;
if(dragDropTimer<10)return;
if(!allowRectangleMove)return false;
if(e.clientY<50 || e.clientY>(documentHeight-50)){
if(e.clientY<50 && !autoScrollActive){
autoScrollActive = true;
autoScroll((autoScrollSpeed*-1),e.clientY);
}
if(e.clientY>(documentHeight-50) && document.documentElement.scrollHeight<=documentScrollHeight && !autoScrollActive){
autoScrollActive = true;
autoScroll(autoScrollSpeed,e.clientY);
}
}else{
autoScrollActive = false;
}
if(useRectangle){
if(dragObject.style.position!='absolute'){
dragObject.style.position = 'absolute';
setTimeout('repositionDragObjectArray()',50);
}
}
if(useRectangle){
rectangleDiv.style.display='block';
}else{
insertionMarkerDiv.style.display='block';
dragDropMoveLayer.style.display='block';
}
if(useRectangle){
dragObject.style.left = (el_x - mouse_x + e.clientX + Math.max(document.body.scrollLeft,document.documentElement.scrollLeft)) + 'px';
dragObject.style.top = (el_y - mouse_y + e.clientY) + 'px';
}else{
dragDropMoveLayer.style.left = (el_x - mouse_x + e.clientX + Math.max(document.body.scrollLeft,document.documentElement.scrollLeft)) + 'px';
dragDropMoveLayer.style.top = (el_y - mouse_y + e.clientY) + 'px';
}
dest = getObjectFromPosition(e.clientX+Math.max(document.body.scrollLeft,document.documentElement.scrollLeft),e.clientY+Math.max(document.body.scrollTop,document.documentElement.scrollTop));
if(dest!==false && dest!='append' && dest!='self'){
destinationObj = dest[0];
if(currentDest!==destinationObj){
currentDest = destinationObj;
if(useRectangle){
destinationObj['obj'].parentNode.insertBefore(rectangleDiv,destinationObj['obj']);
repositionDragObjectArray();
}else{
if(dest[1]>0 && (dragableObjectArray[dest[1]-1]['obj'].offsetLeft + dragableObjectArray[dest[1]-1]['width'] + dragObject.offsetWidth) < dragableAreaWidth){
insertionMarkerDiv.style.left = (getLeftPos(dragableObjectArray[dest[1]-1]['obj']) + dragableObjectArray[dest[1]-1]['width'] + 2) + 'px';
insertionMarkerDiv.style.top = (getTopPos(dragableObjectArray[dest[1]-1]['obj']) - 2) + 'px';
insertionMarkerLine.style.height = dragableObjectArray[dest[1]-1]['height'] + 'px';
}else{
insertionMarkerDiv.style.left = (getLeftPos(destinationObj['obj']) - 8) + 'px';
insertionMarkerDiv.style.top = (getTopPos(destinationObj['obj']) - 2) + 'px';
insertionMarkerLine.style.height = destinationObj['height'] + 'px';
}
}
}
}
if(dest=='self' || !dest){
insertionMarkerDiv.style.display='none';
destinationObj = dest;
}
if(dest=='append'){
if(useRectangle){
dragableElementsParentBox.appendChild(rectangleDiv);
dragableElementsParentBox.appendChild(document.getElementById('clear'));
}else{
var tmpRef = dragableObjectArray[dragableObjectArray.length-1];
insertionMarkerDiv.style.left = (getLeftPos(tmpRef['obj']) + 2) + tmpRef['width'] + 'px';
insertionMarkerDiv.style.top = (getTopPos(tmpRef['obj']) - 2) + 'px';
insertionMarkerLine.style.height = tmpRef['height'] + 'px';
}
destinationObj = dest;
repositionDragObjectArray();
}
if(useRectangle && !dest){
destinationObj = currentDest;
}
allowRectangleMove = false;
setTimeout('allowRectangleMove=true',50);
}
function stop_dragDropElement()
{
dragDropTimer = -1;
if(destinationObj && destinationObj!='append' && destinationObj!='self'){
destinationObj['obj'].parentNode.insertBefore(dragObject,destinationObj['obj']);
}
if(destinationObj=='append'){
dragableElementsParentBox.appendChild(dragObject);
dragableElementsParentBox.appendChild(document.getElementById('clear'));
}
if(dragObject && useRectangle){
dragObject.style.opacity = 1;
dragObject.style.filter = 'alpha(opacity=100)';
dragObject.style.cursor = 'move';
dragObject.style.position='static';
}
rectangleDiv.style.display='none';
insertionMarkerDiv.style.display='none';
dragObject = false;
currentDest = false;
resetObjectArray();
destinationObj = false;
if(dragDropMoveLayer){
dragDropMoveLayer.style.display='none';
dragDropMoveLayer.innerHTML='';
}
autoScrollActive = false;
documentScrollHeight = document.documentElement.scrollHeight + 100;
}
function cancelEvent()
{
return false;
}
function repositionDragObjectArray()
{
for(var no=0;no<dragableObjectArray.length;no++){
ref = dragableObjectArray[no];
ref['left'] = getLeftPos(ref['obj']);
ref['top'] = getTopPos(ref['obj']);
}
documentScrollHeight = document.documentElement.scrollHeight + 100;
documentHeight = document.documentElement.clientHeight;
}
function resetObjectArray()
{
dragableObjectArray.length=0;
var subDivs = dragableElementsParentBox.getElementsByTagName('*');
var countEl = 0;
for(var no=0;no<subDivs.length;no++){
var attr = subDivs[no].getAttribute('dragableBox');
if(opera)attr = subDivs[no].dragableBox;
if(attr=='true'){
var index = dragableObjectArray.length;
dragableObjectArray[index] = new Array();
ref = dragableObjectArray[index];
ref['obj'] = subDivs[no];
ref['width'] = subDivs[no].offsetWidth;
ref['height'] = subDivs[no].offsetHeight;
ref['left'] = getLeftPos(subDivs[no]);
ref['top'] = getTopPos(subDivs[no]);
ref['index'] = countEl;
countEl++;
}
}
}
/* The saveData function creates a string containing the ids of your dragable elements.
The format of this string is as follow
id of item 1;id of item 2;id of item 3
i.e. a semi colon separated list. The id is something you put in as "id" attribute of your dragable elements.
*/
function saveData()
{
var saveString = "";
for(var no=0;no<dragableObjectArray.length;no++){
if(saveString.length>0)saveString = saveString + ';';
ref = dragableObjectArray[no];
saveString = saveString + ref['obj'].id;
}
alert(saveString); // For demo only
/* Put this item into a hidden form field and then submit the form
example:
document.forms[0].itemOrder.value = saveString;
document.forms[0].submit;
On the server explode the values by use of server side script. Then update your database with the new item order
*/
}
function initdragableElements()
{
dragableElementsParentBox = document.getElementById('dragableElementsParentBox');
insertionMarkerDiv = document.getElementById('insertionMarker');
insertionMarkerLine = document.getElementById('insertionMarkerLine');
dragableAreaWidth = dragableElementsParentBox.offsetWidth;
if(!useRectangle){
dragDropMoveLayer = document.createElement('DIV');
dragDropMoveLayer.id = 'dragDropMoveLayer';
document.body.appendChild(dragDropMoveLayer);
}
var subDivs = dragableElementsParentBox.getElementsByTagName('*');
var countEl = 0;
for(var no=0;no<subDivs.length;no++){
var attr = subDivs[no].getAttribute('dragableBox');
if(opera)attr = subDivs[no].dragableBox;
if(attr=='true'){
subDivs[no].style.cursor='move';
subDivs[no].onmousedown = initDrag;
var index = dragableObjectArray.length;
dragableObjectArray[index] = new Array();
ref = dragableObjectArray[index];
ref['obj'] = subDivs[no];
ref['width'] = subDivs[no].offsetWidth;
ref['height'] = subDivs[no].offsetHeight;
ref['left'] = getLeftPos(subDivs[no]);
ref['top'] = getTopPos(subDivs[no]);
ref['index'] = countEl;
countEl++;
}
}
/* Creating rectangel indicating where item will be dropped */
rectangleDiv = document.createElement('DIV');
rectangleDiv.id='rectangle';
rectangleDiv.style.display='none';
dragableElementsParentBox.appendChild(rectangleDiv);
document.body.onmousemove = moveDragableElement;
document.body.onmouseup = stop_dragDropElement;
document.body.onselectstart = cancelSelectionEvent;
document.body.ondragstart = cancelEvent;
window.onresize = repositionDragObjectArray;
documentHeight = document.documentElement.clientHeight;
}
window.onload = initdragableElements;