# EditorGrid.js

    /**
     * @class Ext.grid.EditorGrid
     * @extends Ext.grid.Grid
     * Class for creating and editable grid.
     * @param {String/HTMLElement/Ext.Element} container The element into which this grid will be rendered -
     * The container MUST have some type of size defined for the grid to fill. The container will be
     * automatically set to position relative if it isn't already.
     * @param {Object} dataSource The data model to bind to
     * @param {Object} colModel The column model with info about this grid's columns
     */
    Ext.grid.EditorGrid = function(container, config){
        Ext.grid.EditorGrid.superclass.constructor.call(this, container, config);
        this.container.addClass("xedit-grid");

        if(!this.selModel){
            this.selModel = new Ext.grid.CellSelectionModel();
        }

        this.activeEditor = null;

    	this.addEvents({
    	    /**
    	     * @event beforeedit
    	     * Fires before cell editing is triggered. The edit event object has the following properties <br />
    	     * <ul style="padding:5px;padding-left:16px;">
    	     * <li>grid - This grid</li>
    	     * <li>record - The record being edited</li>
    	     * <li>field - The field name being edited</li>
    	     * <li>value - The value for the field being edited.</li>
    	     * <li>row - The grid row index</li>
    	     * <li>column - The grid column index</li>
    	     * <li>cancel - Set this to true to cancel the edit or return false from your handler.</li>
    	     * </ul>
    	     * @param {Object} e An edit event (see above for description)
    	     */
    	    "beforeedit" : true,
    	    /**
    	     * @event afteredit
    	     * Fires after a cell is edited. <br />
    	     * <ul style="padding:5px;padding-left:16px;">
    	     * <li>grid - This grid</li>
    	     * <li>record - The record being edited</li>
    	     * <li>field - The field name being edited</li>
    	     * <li>value - The value being set</li>
    	     * <li>originalValue - The original value for the field, before the edit.</li>
    	     * <li>row - The grid row index</li>
    	     * <li>column - The grid column index</li>
    	     * </ul>
    	     * @param {Object} e An edit event (see above for description)
    	     */
    	    "afteredit" : true,
    	    /**
    	     * @event validateedit
    	     * Fires after a cell is edited, but before the value is set in the record. Return false
    	     * to cancel the change. The edit event object has the following properties <br />
    	     * <ul style="padding:5px;padding-left:16px;">
    	     * <li>grid - This grid</li>
    	     * <li>record - The record being edited</li>
    	     * <li>field - The field name being edited</li>
    	     * <li>value - The value being set</li>
    	     * <li>originalValue - The original value for the field, before the edit.</li>
    	     * <li>row - The grid row index</li>
    	     * <li>column - The grid column index</li>
    	     * <li>cancel - Set this to true to cancel the edit or return false from your handler.</li>
    	     * </ul>
    	     * @param {Object} e An edit event (see above for description)
    	     */
    	    "validateedit" : true
    	});
        this.on("bodyscroll", this.stopEditing,  this);
        this.on(this.clicksToEdit == 1 ? "cellclick" : "celldblclick", this.onCellDblClick,  this);
    };

    Ext.extend(Ext.grid.EditorGrid, Ext.grid.Grid, {
        isEditor : true,
        clicksToEdit: 2,
        trackMouseOver: false, // causes very odd FF errors

        onCellDblClick : function(g, row, col){
            this.startEditing(row, col);
        },

        onEditComplete : function(ed, value, startValue){
            this.editing = false;
            this.activeEditor = null;
            ed.un("specialkey", this.selModel.onEditorKey, this.selModel);
            if(String(value) != String(startValue)){
                var r = ed.record;
                var field = this.colModel.getDataIndex(ed.col);
                var e = {
                    grid: this,
                    record: r,
                    field: field,
                    originalValue: startValue,
                    value: value,
                    row: ed.row,
                    column: ed.col,
                    cancel:false
                };
                if(this.fireEvent("validateedit", e) !== false && !e.cancel){
                    r.set(field, e.value);
                    delete e.cancel;
                    this.fireEvent("afteredit", e);
                }
            }
            this.view.focusCell(ed.row, ed.col);
        },

        /**
         * Starts editing the specified for the specified row/column
         * @param {Number} rowIndex
         * @param {Number} colIndex
         */
        startEditing : function(row, col){
            this.stopEditing();
            if(this.colModel.isCellEditable(col, row)){
                this.view.focusCell(row, col);
                var r = this.dataSource.getAt(row);
                var field = this.colModel.getDataIndex(col);
                var e = {
                    grid: this,
                    record: r,
                    field: field,
                    value: r.data[field],
                    row: row,
                    column: col,
                    cancel:false
                };
                if(this.fireEvent("beforeedit", e) !== false && !e.cancel){
                    this.editing = true; // flag for buffering of orphan key strokes
                    (function(){ // complex but required for focus issues in safari, ie and opera
                        var ed = this.colModel.getCellEditor(col, row);
                        ed.row = row;
                        ed.col = col;
                        ed.record = r;
                        ed.on("complete", this.onEditComplete, this, {single: true});
                        ed.on("specialkey", this.selModel.onEditorKey, this.selModel);
                        this.activeEditor = ed;
                        var v = r.data[field];
                        ed.startEdit(this.view.getCell(row, col), v);
                    }).defer(50, this);
                }
            }
        },

        /**
         * Stops any active editing
         */
        stopEditing : function(){
            if(this.activeEditor){
                this.activeEditor.completeEdit();
            }
            this.activeEditor = null;
        }
    });

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