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-define("dojo/dnd/Mover", ["../main", "../Evented", "../touch", "./common", "./autoscroll"], function(dojo, Evented, touch) {
- // module:
- // dojo/dnd/Mover
- // summary:
- // TODOC
-
-
-dojo.declare("dojo.dnd.Mover", [Evented], {
- constructor: function(node, e, host){
- // summary:
- // an object which makes a node follow the mouse, or touch-drag on touch devices.
- // Used as a default mover, and as a base class for custom movers.
- // node: Node
- // a node (or node's id) to be moved
- // e: Event
- // a mouse event, which started the move;
- // only pageX and pageY properties are used
- // host: Object?
- // object which implements the functionality of the move,
- // and defines proper events (onMoveStart and onMoveStop)
- this.node = dojo.byId(node);
- this.marginBox = {l: e.pageX, t: e.pageY};
- this.mouseButton = e.button;
- var h = (this.host = host), d = node.ownerDocument;
- this.events = [
- // At the start of a drag, onFirstMove is called, and then the following two
- // connects are disconnected
- dojo.connect(d, touch.move, this, "onFirstMove"),
-
- // These are called continually during the drag
- dojo.connect(d, touch.move, this, "onMouseMove"),
-
- // And these are called at the end of the drag
- dojo.connect(d, touch.release, this, "onMouseUp"),
-
- // cancel text selection and text dragging
- dojo.connect(d, "ondragstart", dojo.stopEvent),
- dojo.connect(d.body, "onselectstart", dojo.stopEvent)
- ];
- // notify that the move has started
- if(h && h.onMoveStart){
- h.onMoveStart(this);
- }
- },
- // mouse event processors
- onMouseMove: function(e){
- // summary:
- // event processor for onmousemove/ontouchmove
- // e: Event
- // mouse/touch event
- dojo.dnd.autoScroll(e);
- var m = this.marginBox;
- this.host.onMove(this, {l: m.l + e.pageX, t: m.t + e.pageY}, e);
- dojo.stopEvent(e);
- },
- onMouseUp: function(e){
- if(dojo.isWebKit && dojo.isMac && this.mouseButton == 2 ?
- e.button == 0 : this.mouseButton == e.button){ // TODO Should condition be met for touch devices, too?
- this.destroy();
- }
- dojo.stopEvent(e);
- },
- // utilities
- onFirstMove: function(e){
- // summary:
- // makes the node absolute; it is meant to be called only once.
- // relative and absolutely positioned nodes are assumed to use pixel units
- var s = this.node.style, l, t, h = this.host;
- switch(s.position){
- case "relative":
- case "absolute":
- // assume that left and top values are in pixels already
- l = Math.round(parseFloat(s.left)) || 0;
- t = Math.round(parseFloat(s.top)) || 0;
- break;
- default:
- s.position = "absolute"; // enforcing the absolute mode
- var m = dojo.marginBox(this.node);
- // event.pageX/pageY (which we used to generate the initial
- // margin box) includes padding and margin set on the body.
- // However, setting the node's position to absolute and then
- // doing dojo.marginBox on it *doesn't* take that additional
- // space into account - so we need to subtract the combined
- // padding and margin. We use getComputedStyle and
- // _getMarginBox/_getContentBox to avoid the extra lookup of
- // the computed style.
- var b = dojo.doc.body;
- var bs = dojo.getComputedStyle(b);
- var bm = dojo._getMarginBox(b, bs);
- var bc = dojo._getContentBox(b, bs);
- l = m.l - (bc.l - bm.l);
- t = m.t - (bc.t - bm.t);
- break;
- }
- this.marginBox.l = l - this.marginBox.l;
- this.marginBox.t = t - this.marginBox.t;
- if(h && h.onFirstMove){
- h.onFirstMove(this, e);
- }
-
- // Disconnect onmousemove and ontouchmove events that call this function
- dojo.disconnect(this.events.shift());
- },
- destroy: function(){
- // summary:
- // stops the move, deletes all references, so the object can be garbage-collected
- dojo.forEach(this.events, dojo.disconnect);
- // undo global settings
- var h = this.host;
- if(h && h.onMoveStop){
- h.onMoveStop(this);
- }
- // destroy objects
- this.events = this.node = this.host = null;
- }
-});
-
-return dojo.dnd.Mover;
-});