/*
 * YUI Extensions 0.33 RC2
 * Copyright(c) 2006, Jack Slocum.
 */

/**
 * @class YAHOO.ext.grid.CellEditor
 * Base class for all EditorGrid editors
 */
YAHOO.ext.grid.CellEditor = function(element){
    this.colIndex = null;
    this.rowIndex = null;
    this.grid = null;
    this.editing = false;
    this.originalValue = null;
    this.element = getEl(element, true);
    this.element.addClass('ygrid-editor');
    this.element.dom.tabIndex = 1;
    this.initialized = false;
    this.callback = null;
};

YAHOO.ext.grid.CellEditor.prototype = {
    init : function(grid, bodyElement, callback){
        // there's no way for the grid to know if multiple columns 
        // share the same editor so it will try to initialize the 
        // same one over and over
        if(this.initialized) return;
        this.initialized = true;
        this.callback = callback;
        this.grid = grid;
        bodyElement.appendChild(this.element.dom);
        this.initEvents();
    },
    
    initEvents : function(){
        var stopOnEnter = function(e){
            if(e.browserEvent.keyCode == e.RETURN){
                this.stopEditing(true);
            }else if(e.browserEvent.keyCode == e.ESC){
                this.setValue(this.originalValue);
                this.stopEditing(true);
            }
        }
        this.element.mon('keydown', stopOnEnter, this, true);
        this.element.on('blur', this.stopEditing, this, true);
    },

    startEditing : function(value, row, cell){
        this.originalValue = value;
        this.rowIndex = row.rowIndex;
        this.colIndex = cell.columnIndex;
        this.cell = cell;
        this.setValue(value);
        var cellbox = getEl(cell, true).getBox();
        this.fitToCell(cellbox);
        this.editing = true;
        this.show();
    },
     
    stopEditing : function(focusCell){
         if(this.editing){
             this.editing = false;
             var newValue = this.getValue();
             this.hide();
             //if(focusCell){try{this.cell.focus();}catch(e){}}; // try to give the cell focus so keyboard nav still works
             if(this.originalValue != newValue){
                this.callback(newValue, this.rowIndex, this.colIndex);
             }
         }
     },
     
    setValue : function(value){
        this.element.dom.value = value;
    },
    
    getValue : function(){
        return this.element.dom.value;
    },
    
    fitToCell : function(box){
        this.element.setBox(box, true);
    },
    
    show : function(){
        this.element.show();
        this.element.focus();
    },
    
    hide : function(){
        try{
            this.element.dom.blur();
        }catch(e){}
        this.element.hide();
    }
};