/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
/**
 * @class Ext.grid.EditorGridPanel
 * @extends Ext.grid.GridPanel
 * <p>This class extends the {@link Ext.grid.GridPanel GridPanel Class} to provide cell editing
 * on selected {@link Ext.grid.Column columns}. The editable columns are specified by providing
 * an {@link Ext.grid.ColumnModel#editor editor} in the {@link Ext.grid.Column column configuration}.</p>
 * <p>Editability of columns may be controlled programatically by inserting an implementation
 * of {@link Ext.grid.ColumnModel#isCellEditable isCellEditable} into the
 * {@link Ext.grid.ColumnModel ColumnModel}.</p>
 * <p>Editing is performed on the value of the <i>field</i> specified by the column's
 * <tt>{@link Ext.grid.ColumnModel#dataIndex dataIndex}</tt> in the backing {@link Ext.data.Store Store}
 * (so if you are using a {@link Ext.grid.ColumnModel#setRenderer renderer} in order to display
 * transformed data, this must be accounted for).</p>
 * <p>If a value-to-description mapping is used to render a column, then a {@link Ext.form.Field#ComboBox ComboBox}
 * which uses the same {@link Ext.form.Field#valueField value}-to-{@link Ext.form.Field#displayFieldField description}
 * mapping would be an appropriate editor.</p>
 * If there is a more complex mismatch between the visible data in the grid, and the editable data in
 * the {@link Edt.data.Store Store}, then code to transform the data both before and after editing can be
 * injected using the {@link #beforeedit} and {@link #afteredit} events.
 * @constructor
 * @param {Object} config The config object
 * @xtype editorgrid
 */
Ext.grid.EditorGridPanel = Ext.extend(Ext.grid.GridPanel, {
    /**
     * @cfg {Number} clicksToEdit
     * <p>The number of clicks on a cell required to display the cell's editor (defaults to 2).</p>
     * <p>Setting this option to 'auto' means that mousedown <i>on the selected cell</i> starts
     * editing that cell.</p>
     */
    clicksToEdit: 2,

    /**
    * @cfg {Boolean} forceValidation
    * True to force validation even if the value is unmodified (defaults to false)
    */
    forceValidation: false,

    // private
    isEditor : true,
    // private
    detectEdit: false,

    /**
     * @cfg {Boolean} autoEncode
     * True to automatically HTML encode and decode values pre and post edit (defaults to false)
     */
    autoEncode : false,

    /**
     * @cfg {Boolean} trackMouseOver @hide
     */
    // private
    trackMouseOver: false, // causes very odd FF errors

    // private
    initComponent : function(){
        Ext.grid.EditorGridPanel.superclass.initComponent.call(this);

        if(!this.selModel){
            /**
             * @cfg {Object} selModel Any subclass of AbstractSelectionModel that will provide the selection model for
             * the grid (defaults to {@link Ext.grid.CellSelectionModel} if not specified).
             */
            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",
            /**
             * @event afteredit
             * Fires after a cell is edited. 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>
             * </ul>
             *
             * <pre><code>
grid.on('afteredit', afterEdit, this );

function afterEdit(e) {
    // execute an XHR to send/commit data to the server, in callback do (if successful):
    e.record.commit();
};
             * </code></pre>
             * @param {Object} e An edit event (see above for description)
             */
            "afteredit",
            /**
             * @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>
             * Usage example showing how to remove the red triangle (dirty record indicator) from some
             * records (not all).  By observing the grid's validateedit event, it can be cancelled if
             * the edit occurs on a targeted row (for example) and then setting the field's new value
             * in the Record directly:
             * <pre><code>
grid.on('validateedit', function(e) {
  var myTargetRow = 6;

  if (e.row == myTargetRow) {
    e.cancel = true;
    e.record.data[e.field] = e.value;
  }
});
             * </code></pre>
             * @param {Object} e An edit event (see above for description)
             */
            "validateedit"
        );
    },

    // private
    initEvents : function(){
        Ext.grid.EditorGridPanel.superclass.initEvents.call(this);

        this.getGridEl().on('mousewheel', this.stopEditing.createDelegate(this, [true]), this);
        this.on('columnresize', this.stopEditing, this, [true]);

        if(this.clicksToEdit == 1){
            this.on("cellclick", this.onCellDblClick, this);
        }else {
            var view = this.getView();
            if(this.clicksToEdit == 'auto' && view.mainBody){
                view.mainBody.on('mousedown', this.onAutoEditClick, this);
            }
            this.on('celldblclick', this.onCellDblClick, this);
        }
    },

    onResize : function(){
        Ext.grid.EditorGridPanel.superclass.onResize.apply(this, arguments);
        var ae = this.activeEditor;
        if(this.editing && ae){
            ae.realign(true);
        }
    },

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

    // private
    onAutoEditClick : function(e, t){
        if(e.button !== 0){
            return;
        }
        var row = this.view.findRowIndex(t),
            col = this.view.findCellIndex(t);
        if(row !== false && col !== false){
            this.stopEditing();
            if(this.selModel.getSelectedCell){ // cell sm
                var sc = this.selModel.getSelectedCell();
                if(sc && sc[0] === row && sc[1] === col){
                    this.startEditing(row, col);
                }
            }else{
                if(this.selModel.isSelected(row)){
                    this.startEditing(row, col);
                }
            }
        }
    },

    // private
    onEditComplete : function(ed, value, startValue){
        this.editing = false;
        this.lastActiveEditor = this.activeEditor;
        this.activeEditor = null;

        var r = ed.record,
            field = this.colModel.getDataIndex(ed.col);
        value = this.postEditValue(value, startValue, r, field);
        if(this.forceValidation === true || String(value) !== String(startValue)){
            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 && String(value) !== String(startValue)){
                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.ensureVisible(row, col, true);
            var r = this.store.getAt(row),
                field = this.colModel.getDataIndex(col),
                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;
                var ed = this.colModel.getCellEditor(col, row);
                if(!ed){
                    return;
                }
                if(!ed.rendered){
                    ed.parentEl = this.view.getEditorParent(ed);
                    ed.on({
                        scope: this,
                        render: {
                            fn: function(c){
                                c.field.focus(false, true);
                            },
                            single: true,
                            scope: this
                        },
                        specialkey: function(field, e){
                            this.getSelectionModel().onEditorKey(field, e);
                        },
                        complete: this.onEditComplete,
                        canceledit: this.stopEditing.createDelegate(this, [true])
                    });
                }
                Ext.apply(ed, {
                    row     : row,
                    col     : col,
                    record  : r
                });
                this.lastEdit = {
                    row: row,
                    col: col
                };
                this.activeEditor = ed;
                if (ed.field.isXType('checkbox')) {
                    ed.allowBlur = false;
                    this.setupCheckbox(ed.field);    
                }
                // Set the selectSameEditor flag if we are reusing the same editor again and
                // need to prevent the editor from firing onBlur on itself.
                ed.selectSameEditor = (this.activeEditor == this.lastActiveEditor);
                var v = this.preEditValue(r, field);
                ed.startEdit(this.view.getCell(row, col).firstChild, Ext.isDefined(v) ? v : '');

                // Clear the selectSameEditor flag
                (function(){
                    delete ed.selectSameEditor;
                }).defer(50);
            }
        }
    },
    
    setupCheckbox: function(field){
        var me = this,
            fn = function() {
                field.el.on('click', me.onCheckClick, me, {single: true});
            };
        if (field.rendered) {
            fn();
        } else {
            field.on('render', fn, null, {single: true});
        }
    },
    
    onCheckClick: function(){
        var ed = this.activeEditor;
        ed.allowBlur = true;
        ed.field.focus(false, 10);   
    },

    // private
    preEditValue : function(r, field){
        var value = r.data[field];
        return this.autoEncode && Ext.isString(value) ? Ext.util.Format.htmlDecode(value) : value;
    },

    // private
    postEditValue : function(value, originalValue, r, field){
        return this.autoEncode && Ext.isString(value) ? Ext.util.Format.htmlEncode(value) : value;
    },

    /**
     * Stops any active editing
     * @param {Boolean} cancel (optional) True to cancel any changes
     */
    stopEditing : function(cancel){
        if(this.editing){
            // Store the lastActiveEditor to check if it is changing
            var ae = this.lastActiveEditor = this.activeEditor;
            if(ae){
                ae[cancel === true ? 'cancelEdit' : 'completeEdit']();
                this.view.focusCell(ae.row, ae.col);
            }
            this.activeEditor = null;
        }
        this.editing = false;
    }
});
Ext.reg('editorgrid', Ext.grid.EditorGridPanel);