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41 lines
3.4 KiB
JavaScript
41 lines
3.4 KiB
JavaScript
//\/////
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//\ overLIB Draggable Plugin
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//\
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//\ You may not remove or change this notice.
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//\ Copyright Erik Bosrup 1998-2003. All rights reserved.
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//\ Contributors are listed on the homepage.
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//\ See http://www.bosrup.com/web/overlib/ for details.
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//\/////
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if(typeof olInfo=='undefined'||typeof olInfo.meets=='undefined'||!olInfo.meets(4.14))alert('overLIB 4.14 or later is required for the Draggable Plugin.');else{registerCommands('draggable,altcut,dragimg');
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if(typeof ol_draggable=='undefined')var ol_draggable=0;if(typeof ol_altcut=='undefined')var ol_altcut=0;if(typeof ol_dragimg=='undefined')var ol_dragimg='';
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var o3_draggable=0,o3_altcut=0,o3_dragimg='',olImgLeft,olImgTop,olImgObj,olMseMv;
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function setDragVariables(){o3_draggable=ol_draggable;o3_altcut=ol_altcut;o3_dragimg=ol_dragimg;olImgObj=null;}
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function parseDragExtras(pf,i,ar){var k=i;if(k<ar.length){if(ar[k]==DRAGGABLE){eval(pf+'draggable=('+pf+'draggable==0)?1:0');return k;}
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if(ar[k]==ALTCUT){eval(pf+'altcut=('+pf+'altcut==0)?1:0');return k;}
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if(ar[k]==DRAGIMG){eval(pf+'dragimg="'+ar[++k]+'"');return k;}}
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return-1;}
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function startDrag(){
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if(o3_draggable){if(o3_sticky&&(o3_frame==ol_frame))initDrag();else o3_draggable=0;}}
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function stopDrag(){if(o3_draggable)endDrag();}
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function initDrag(){olMseMv=capExtent.onmousemove;if(olNs4){document.captureEvents(Event.MOUSEDOWN|Event.CLICK);document.onmousedown=grabEl;document.onclick=function(e){return routeEvent(e);}
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}else{over.onmousedown=grabEl;}
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if(o3_dragimg)chkForImgSupport(o3_dragimg);return true;}
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function chkForImgSupport(dragImg){if(dragImg){if(typeof getAnchorObjRef!='undefined')olImgObj=getAnchorObjRef(dragImg);if(olImgObj==null)o3_dragimg='';}}
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function setCursor(on){if(olNs4)return;over.style.cursor=(on?'move':'auto');}
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function chkCursorPosition(Obj,XPos,YPos){if(Obj){o3_anchorx=o3_anchory=0;o3_anchoralign='UL';getAnchorLocation(Obj);if(XPos<olImgLeft||XPos>(olImgLeft+Obj.width)||YPos<olImgTop||YPos>(olImgTop+Obj.height))return false;}
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return true;}
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function grabEl(e){var e=(e)?e:event;var X,Y;var cKy=(olNs4?e.modifiers&Event.ALT_MASK:(!olOp?e.altKey:e.ctrlKey));if((o3_altcut?!cKy:cKy)){
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X=(e.pageX||eval('e.clientX+o3_frame.'+docRoot+'.scrollLeft'));Y=(e.pageY||eval('e.clientY+o3_frame.'+docRoot+'.scrollTop'));if(chkCursorPosition(olImgObj,X,Y)){if(olNs4)document.captureEvents(Event.MOUSEUP);capExtent.onmousemove=moveEl;document.onmouseup=function(){setCursor(0);if(olIe4)over.onselectstart=null;capExtent.onmousemove=olMseMv;}
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setCursor(1);if(olIe4)over.onselectstart=function(){return false;}
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if(olNs4){cX=X
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cY=Y
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}else{
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cX=X-(olNs4?over.left:parseInt(over.style.left));cY=Y-(olNs4?over.top:parseInt(over.style.top));}
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return(olNs4?routeEvent(e):false);}
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}else setCursor(0);}
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function moveEl(e){var e=(e)?e:event;var dX,dY,X,Y;
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X=(e.pageX||eval('e.clientX+o3_frame.'+docRoot+'.scrollLeft'));Y=(e.pageY||eval('e.clientY+o3_frame.'+docRoot+'.scrollTop'));if(chkCursorPosition(olImgObj,X,Y)){if(olNs4){dX=X-cX;cX=X;dY=Y-cY;cY=Y;over.moveBy(dX,dY);}else
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repositionTo(over,X-cX,Y-cY);}}
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function endDrag(obj){if(olNs4){document.releaseEvents(Event.MOUSEDOWN|Event.MOUSEUP|Event.CLICK);document.onmousedown=document.onclick=null;}else{if(!obj)obj=over;obj.onmousedown=null;}
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document.onmouseup=null;}
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registerRunTimeFunction(setDragVariables);registerCmdLineFunction(parseDragExtras);registerHook("disp",startDrag,FBEFORE);registerHook("hideObject",stopDrag,FAFTER);if(olInfo.meets(4.14))registerNoParameterCommands('draggable,altcut');}
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