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authormensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
committermensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
commite44a7e37b6c7b5961adaffc62b9042b8d442938e (patch)
tree95b67c356e93163467db2451f2b8cce84ed5d582 /includes/js/dojo/dnd/Mover.js
parenta62b9742ee5e28bcec6872d88f50f25b820914f6 (diff)
downloadsemanticscuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.gz
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New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
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+if(!dojo._hasResource["dojo.dnd.Mover"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.dnd.Mover"] = true;
+dojo.provide("dojo.dnd.Mover");
+
+dojo.require("dojo.dnd.common");
+dojo.require("dojo.dnd.autoscroll");
+
+dojo.declare("dojo.dnd.Mover", null, {
+ constructor: function(node, e, host){
+ // summary: an object, which makes a node follow the mouse,
+ // 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,
+ firstEvent = dojo.connect(d, "onmousemove", this, "onFirstMove");
+ this.events = [
+ dojo.connect(d, "onmousemove", this, "onMouseMove"),
+ dojo.connect(d, "onmouseup", this, "onMouseUp"),
+ // cancel text selection and text dragging
+ dojo.connect(d, "ondragstart", dojo, "stopEvent"),
+ dojo.connect(d, "onselectstart", dojo, "stopEvent"),
+ firstEvent
+ ];
+ // notify that the move has started
+ if(h && h.onMoveStart){
+ h.onMoveStart(this);
+ }
+ },
+ // mouse event processors
+ onMouseMove: function(e){
+ // summary: event processor for onmousemove
+ // e: Event: mouse event
+ dojo.dnd.autoScroll(e);
+ var m = this.marginBox;
+ this.host.onMove(this, {l: m.l + e.pageX, t: m.t + e.pageY});
+ },
+ onMouseUp: function(e){
+ if(this.mouseButton == e.button){
+ this.destroy();
+ }
+ },
+ // utilities
+ onFirstMove: function(){
+ // summary: makes the node absolute; it is meant to be called only once
+ var s = this.node.style, l, t;
+ switch(s.position){
+ case "relative":
+ case "absolute":
+ // assume that left and top values are in pixels already
+ l = Math.round(parseFloat(s.left));
+ t = Math.round(parseFloat(s.top));
+ break;
+ default:
+ s.position = "absolute"; // enforcing the absolute mode
+ var m = dojo.marginBox(this.node);
+ l = m.l;
+ t = m.t;
+ break;
+ }
+ this.marginBox.l = l - this.marginBox.l;
+ this.marginBox.t = t - this.marginBox.t;
+ this.host.onFirstMove(this);
+ dojo.disconnect(this.events.pop());
+ },
+ 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 = null;
+ }
+});
+
+}