git.pond.sub.org Git - eow/blob - static/dojo-release-1.1.1/dojox/grid/_grid/drag.js

   1 if(!dojo._hasResource["dojox.grid._grid.drag"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
   2 dojo._hasResource["dojox.grid._grid.drag"] = true;
   3 dojo.provide("dojox.grid._grid.drag");
   4
   5 // summary:
   6 //      utility functions for dragging as used in grid.
   7 // begin closure
   8 (function(){
   9
  10 var dgdrag = dojox.grid.drag = {};
  11
  12 dgdrag.dragging = false;
  13 dgdrag.hysteresis = 2;
  14
  15 dgdrag.capture = function(inElement) {
  16         //console.debug('dojox.grid.drag.capture');
  17         if (inElement.setCapture)
  18                 inElement.setCapture();
  19         else {
  20                 document.addEventListener("mousemove", inElement.onmousemove, true);
  21                 document.addEventListener("mouseup", inElement.onmouseup, true);
  22                 document.addEventListener("click", inElement.onclick, true);
  23         }
  24 }
  25
  26 dgdrag.release = function(inElement) {
  27         //console.debug('dojox.grid.drag.release');
  28         if(inElement.releaseCapture){
  29                 inElement.releaseCapture();
  30         }else{
  31                 document.removeEventListener("click", inElement.onclick, true);
  32                 document.removeEventListener("mouseup", inElement.onmouseup, true);
  33                 document.removeEventListener("mousemove", inElement.onmousemove, true);
  34         }
  35 }
  36
  37 dgdrag.start = function(inElement, inOnDrag, inOnEnd, inEvent, inOnStart){
  38         if(/*dgdrag.elt ||*/ !inElement || dgdrag.dragging){
  39                 console.debug('failed to start drag: bad input node or already dragging');
  40                 return;
  41         }
  42         dgdrag.dragging = true;
  43         dgdrag.elt = inElement;
  44         dgdrag.events = {
  45                 drag: inOnDrag || dojox.grid.nop,
  46                 end: inOnEnd || dojox.grid.nop,
  47                 start: inOnStart || dojox.grid.nop,
  48                 oldmove: inElement.onmousemove,
  49                 oldup: inElement.onmouseup,
  50                 oldclick: inElement.onclick
  51         };
  52         dgdrag.positionX = (inEvent && ('screenX' in inEvent) ? inEvent.screenX : false);
  53         dgdrag.positionY = (inEvent && ('screenY' in inEvent) ? inEvent.screenY : false);
  54         dgdrag.started = (dgdrag.position === false);
  55         inElement.onmousemove = dgdrag.mousemove;
  56         inElement.onmouseup = dgdrag.mouseup;
  57         inElement.onclick = dgdrag.click;
  58         dgdrag.capture(dgdrag.elt);
  59 }
  60
  61 dgdrag.end = function(){
  62         //console.debug("dojox.grid.drag.end");
  63         dgdrag.release(dgdrag.elt);
  64         dgdrag.elt.onmousemove = dgdrag.events.oldmove;
  65         dgdrag.elt.onmouseup = dgdrag.events.oldup;
  66         dgdrag.elt.onclick = dgdrag.events.oldclick;
  67         dgdrag.elt = null;
  68         try{
  69                 if(dgdrag.started){
  70                         dgdrag.events.end();
  71                 }
  72         }finally{
  73                 dgdrag.dragging = false;
  74         }
  75 }
  76
  77 dgdrag.calcDelta = function(inEvent){
  78         inEvent.deltaX = inEvent.screenX - dgdrag.positionX;
  79         inEvent.deltaY = inEvent.screenY - dgdrag.positionY;
  80 }
  81
  82 dgdrag.hasMoved = function(inEvent){
  83         return Math.abs(inEvent.deltaX) + Math.abs(inEvent.deltaY) > dgdrag.hysteresis;
  84 }
  85
  86 dgdrag.mousemove = function(inEvent){
  87         inEvent = dojo.fixEvent(inEvent);
  88         dojo.stopEvent(inEvent);
  89         dgdrag.calcDelta(inEvent);
  90         if((!dgdrag.started)&&(dgdrag.hasMoved(inEvent))){
  91                 dgdrag.events.start(inEvent);
  92                 dgdrag.started = true;
  93         }
  94         if(dgdrag.started){
  95                 dgdrag.events.drag(inEvent);
  96         }
  97 }
  98
  99 dgdrag.mouseup = function(inEvent){
 100         //console.debug("dojox.grid.drag.mouseup");
 101         dojo.stopEvent(dojo.fixEvent(inEvent));
 102         dgdrag.end();
 103 }
 104
 105 dgdrag.click = function(inEvent){
 106         dojo.stopEvent(dojo.fixEvent(inEvent));
 107         //dgdrag.end();
 108 }
 109
 110 })();
 111 // end closure
 112
 113 }