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/*
Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
if(!dojo._hasResource["dojox.drawing.manager.Undo"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.drawing.manager.Undo"] = true;
dojo.provide("dojox.drawing.manager.Undo");
dojox.drawing.manager.Undo = dojox.drawing.util.oo.declare(
// summary
// Handles the Undo in drawing.
// NOTE: Only partially implemented!!! There is very
// little actual undo functionality!
//
function(options){
this.keys = options.keys;
this.undostack = [];
this.redostack = [];
dojo.connect(this.keys, "onKeyDown", this, "onKeyDown");
},
{
onKeyDown: function(evt){
if(!evt.cmmd){ return; }
if(evt.keyCode==90 && !evt.shift){
this.undo();
}else if((evt.keyCode == 90 && evt.shift) || evt.keyCode==89){
this.redo();
}
},
add: function(stack){
//console.log("undo add", stack)
stack.args = dojo.mixin({}, stack.args);
this.undostack.push(stack);
},
apply: function(scope, method, args){
dojo.hitch(scope, method)(args);
},
undo: function(){
var o = this.undostack.pop();
console.log("undo!", o);
if(!o){ return; }
o.before();
this.redostack.push(o);
},
redo: function(){
console.log("redo!");
var o = this.redostack.pop();
if(!o){ return; }
if(o.after){
o.after();
}else{
o.before(); ///??????
}
this.undostack.push(o);
}
}
);
}
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