Subversion Repositories Applications.papyrus

if(!dojo._hasResource["dojo.dnd.Selector"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojo.dnd.Selector"] = true;
dojo.provide("dojo.dnd.Selector");

dojo.require("dojo.dnd.common");
dojo.require("dojo.dnd.Container");

/*
        Container item states:
                ""                      - an item is not selected
                "Selected"      - an item is selected
                "Anchor"        - an item is selected, and is an anchor for a "shift" selection
*/

dojo.declare("dojo.dnd.Selector", dojo.dnd.Container, {
        // summary: a Selector object, which knows how to select its children
        
        constructor: function(node, params){
                // summary: a constructor of the Selector
                // node: Node: node or node's id to build the selector on
                // params: Object: a dict of parameters, recognized parameters are:
                //      singular: Boolean: allows selection of only one element, if true
                //      the rest of parameters are passed to the container
                if(!params){ params = {}; }
                this.singular = params.singular;
                // class-specific variables
                this.selection = {};
                this.anchor = null;
                this.simpleSelection = false;
                // set up events
                this.events.push(
                        dojo.connect(this.node, "onmousedown", this, "onMouseDown"),
                        dojo.connect(this.node, "onmouseup",   this, "onMouseUp"));
        },
        
        // object attributes (for markup)
        singular: false,        // is singular property
        
        // methods
        getSelectedNodes: function(){
                // summary: returns a list (an array) of selected nodes
                var t = new dojo.NodeList();
                var e = dojo.dnd._empty;
                for(var i in this.selection){
                        if(i in e){ continue; }
                        t.push(dojo.byId(i));
                }
                return t;       // Array
        },
        selectNone: function(){
                // summary: unselects all items
                return this._removeSelection()._removeAnchor(); // self
        },
        selectAll: function(){
                // summary: selects all items
                this.forInItems(function(data, id){
                        this._addItemClass(dojo.byId(id), "Selected");
                        this.selection[id] = 1;
                }, this);
                return this._removeAnchor();    // self
        },
        deleteSelectedNodes: function(){
                // summary: deletes all selected items
                var e = dojo.dnd._empty;
                for(var i in this.selection){
                        if(i in e){ continue; }
                        var n = dojo.byId(i);
                        this.delItem(i);
                        dojo._destroyElement(n);
                }
                this.anchor = null;
                this.selection = {};
                return this;    // self
        },
        insertNodes: function(addSelected, data, before, anchor){
                // summary: inserts new data items (see Container's insertNodes method for details)
                // addSelected: Boolean: all new nodes will be added to selected items, if true, no selection change otherwise
                // data: Array: a list of data items, which should be processed by the creator function
                // before: Boolean: insert before the anchor, if true, and after the anchor otherwise
                // anchor: Node: the anchor node to be used as a point of insertion
                var oldCreator = this._normalizedCreator;
                this._normalizedCreator = function(item, hint){
                        var t = oldCreator.call(this, item, hint);
                        if(addSelected){
                                if(!this.anchor){
                                        this.anchor = t.node;
                                        this._removeItemClass(t.node, "Selected");
                                        this._addItemClass(this.anchor, "Anchor");
                                }else if(this.anchor != t.node){
                                        this._removeItemClass(t.node, "Anchor");
                                        this._addItemClass(t.node, "Selected");
                                }
                                this.selection[t.node.id] = 1;
                        }else{
                                this._removeItemClass(t.node, "Selected");
                                this._removeItemClass(t.node, "Anchor");
                        }
                        return t;
                };
                dojo.dnd.Selector.superclass.insertNodes.call(this, data, before, anchor);
                this._normalizedCreator = oldCreator;
                return this;    // self
        },
        destroy: function(){
                // summary: prepares the object to be garbage-collected
                dojo.dnd.Selector.superclass.destroy.call(this);
                this.selection = this.anchor = null;
        },

        // markup methods
        markupFactory: function(params, node){
                params._skipStartup = true;
                return new dojo.dnd.Selector(node, params);
        },

        // mouse events
        onMouseDown: function(e){
                // summary: event processor for onmousedown
                // e: Event: mouse event
                if(!this.current){ return; }
                if(!this.singular && !dojo.dnd.getCopyKeyState(e) && !e.shiftKey && (this.current.id in this.selection)){
                        this.simpleSelection = true;
                        dojo.stopEvent(e);
                        return;
                }
                if(!this.singular && e.shiftKey){
                        if(!dojo.dnd.getCopyKeyState(e)){
                                this._removeSelection();
                        }
                        var c = dojo.query("> .dojoDndItem", this.parent);
                        if(c.length){
                                if(!this.anchor){
                                        this.anchor = c[0];
                                        this._addItemClass(this.anchor, "Anchor");
                                }
                                this.selection[this.anchor.id] = 1;
                                if(this.anchor != this.current){
                                        var i = 0;
                                        for(; i < c.length; ++i){
                                                var node = c[i];
                                                if(node == this.anchor || node == this.current){ break; }
                                        }
                                        for(++i; i < c.length; ++i){
                                                var node = c[i];
                                                if(node == this.anchor || node == this.current){ break; }
                                                this._addItemClass(node, "Selected");
                                                this.selection[node.id] = 1;
                                        }
                                        this._addItemClass(this.current, "Selected");
                                        this.selection[this.current.id] = 1;
                                }
                        }
                }else{
                        if(this.singular){
                                if(this.anchor == this.current){
                                        if(dojo.dnd.getCopyKeyState(e)){
                                                this.selectNone();
                                        }
                                }else{
                                        this.selectNone();
                                        this.anchor = this.current;
                                        this._addItemClass(this.anchor, "Anchor");
                                        this.selection[this.current.id] = 1;
                                }
                        }else{
                                if(dojo.dnd.getCopyKeyState(e)){
                                        if(this.anchor == this.current){
                                                delete this.selection[this.anchor.id];
                                                this._removeAnchor();
                                        }else{
                                                if(this.current.id in this.selection){
                                                        this._removeItemClass(this.current, "Selected");
                                                        delete this.selection[this.current.id];
                                                }else{
                                                        if(this.anchor){
                                                                this._removeItemClass(this.anchor, "Anchor");
                                                                this._addItemClass(this.anchor, "Selected");
                                                        }
                                                        this.anchor = this.current;
                                                        this._addItemClass(this.current, "Anchor");
                                                        this.selection[this.current.id] = 1;
                                                }
                                        }
                                }else{
                                        if(!(this.current.id in this.selection)){
                                                this.selectNone();
                                                this.anchor = this.current;
                                                this._addItemClass(this.current, "Anchor");
                                                this.selection[this.current.id] = 1;
                                        }
                                }
                        }
                }
                dojo.stopEvent(e);
        },
        onMouseUp: function(e){
                // summary: event processor for onmouseup
                // e: Event: mouse event
                if(!this.simpleSelection){ return; }
                this.simpleSelection = false;
                this.selectNone();
                if(this.current){
                        this.anchor = this.current;
                        this._addItemClass(this.anchor, "Anchor");
                        this.selection[this.current.id] = 1;
                }
        },
        onMouseMove: function(e){
                // summary: event processor for onmousemove
                // e: Event: mouse event
                this.simpleSelection = false;
        },
        
        // utilities
        onOverEvent: function(){
                // summary: this function is called once, when mouse is over our container
                this.onmousemoveEvent = dojo.connect(this.node, "onmousemove", this, "onMouseMove");
        },
        onOutEvent: function(){
                // summary: this function is called once, when mouse is out of our container
                dojo.disconnect(this.onmousemoveEvent);
                delete this.onmousemoveEvent;
        },
        _removeSelection: function(){
                // summary: unselects all items
                var e = dojo.dnd._empty;
                for(var i in this.selection){
                        if(i in e){ continue; }
                        var node = dojo.byId(i);
                        if(node){ this._removeItemClass(node, "Selected"); }
                }
                this.selection = {};
                return this;    // self
        },
        _removeAnchor: function(){
                if(this.anchor){
                        this._removeItemClass(this.anchor, "Anchor");
                        this.anchor = null;
                }
                return this;    // self
        }
});

}