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drag.js
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drag.js
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if(!dojo._hasResource["dojox.grid._grid.drag"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.grid._grid.drag"] = true;
dojo.provide("dojox.grid._grid.drag");
// summary:
// utility functions for dragging as used in grid.
// begin closure
(function(){
var dgdrag = dojox.grid.drag = {};
dgdrag.dragging = false;
dgdrag.hysteresis = 2;
dgdrag.capture = function(inElement) {
//console.debug('dojox.grid.drag.capture');
if (inElement.setCapture)
inElement.setCapture();
else {
document.addEventListener("mousemove", inElement.onmousemove, true);
document.addEventListener("mouseup", inElement.onmouseup, true);
document.addEventListener("click", inElement.onclick, true);
}
}
dgdrag.release = function(inElement) {
//console.debug('dojox.grid.drag.release');
if(inElement.releaseCapture){
inElement.releaseCapture();
}else{
document.removeEventListener("click", inElement.onclick, true);
document.removeEventListener("mouseup", inElement.onmouseup, true);
document.removeEventListener("mousemove", inElement.onmousemove, true);
}
}
dgdrag.start = function(inElement, inOnDrag, inOnEnd, inEvent, inOnStart){
if(/*dgdrag.elt ||*/ !inElement || dgdrag.dragging){
console.debug('failed to start drag: bad input node or already dragging');
return;
}
dgdrag.dragging = true;
dgdrag.elt = inElement;
dgdrag.events = {
drag: inOnDrag || dojox.grid.nop,
end: inOnEnd || dojox.grid.nop,
start: inOnStart || dojox.grid.nop,
oldmove: inElement.onmousemove,
oldup: inElement.onmouseup,
oldclick: inElement.onclick
};
dgdrag.positionX = (inEvent && ('screenX' in inEvent) ? inEvent.screenX : false);
dgdrag.positionY = (inEvent && ('screenY' in inEvent) ? inEvent.screenY : false);
dgdrag.started = (dgdrag.position === false);
inElement.onmousemove = dgdrag.mousemove;
inElement.onmouseup = dgdrag.mouseup;
inElement.onclick = dgdrag.click;
dgdrag.capture(dgdrag.elt);
}
dgdrag.end = function(){
//console.debug("dojox.grid.drag.end");
dgdrag.release(dgdrag.elt);
dgdrag.elt.onmousemove = dgdrag.events.oldmove;
dgdrag.elt.onmouseup = dgdrag.events.oldup;
dgdrag.elt.onclick = dgdrag.events.oldclick;
dgdrag.elt = null;
try{
if(dgdrag.started){
dgdrag.events.end();
}
}finally{
dgdrag.dragging = false;
}
}
dgdrag.calcDelta = function(inEvent){
inEvent.deltaX = inEvent.screenX - dgdrag.positionX;
inEvent.deltaY = inEvent.screenY - dgdrag.positionY;
}
dgdrag.hasMoved = function(inEvent){
return Math.abs(inEvent.deltaX) + Math.abs(inEvent.deltaY) > dgdrag.hysteresis;
}
dgdrag.mousemove = function(inEvent){
inEvent = dojo.fixEvent(inEvent);
dojo.stopEvent(inEvent);
dgdrag.calcDelta(inEvent);
if((!dgdrag.started)&&(dgdrag.hasMoved(inEvent))){
dgdrag.events.start(inEvent);
dgdrag.started = true;
}
if(dgdrag.started){
dgdrag.events.drag(inEvent);
}
}
dgdrag.mouseup = function(inEvent){
//console.debug("dojox.grid.drag.mouseup");
dojo.stopEvent(dojo.fixEvent(inEvent));
dgdrag.end();
}
dgdrag.click = function(inEvent){
dojo.stopEvent(dojo.fixEvent(inEvent));
//dgdrag.end();
}
})();
// end closure
}

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drag.js (3 KB)

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