コード例 #1
0
        /// <summary>
        /// Need to close current popup and open popup if current item has invalid property.
        /// </summary>
        /// <param name="sender">Ignored.</param>
        /// <param name="e">DataGridItemCancelEventArgs.</param>
        private void _CollectionViewSourceBeginningEdit(object sender, DataGridItemCancelEventArgs e)
        {
            // Do not show callout, when pointing on invalid cell.
            _StopTimer();

            // If callout pointing at another item - close it.
            if (_InvalidItem != e.Item && _Callout.IsOpen)
            {
                _ClosePopup(true);
                _callout = new Callout();
            }

            // Remember edited item and subscribe to it's property changed event.
            _InvalidItem = e.Item as IDataErrorInfo;
            (e.Item as INotifyPropertyChanged).PropertyChanged += new PropertyChangedEventHandler
                (_EditedItemPropertyChanged);

            // If current column have error.
            if (_dataGrid.CurrentColumn != null &&
                !string.IsNullOrEmpty((e.Item as IDataErrorInfo)[_dataGrid.CurrentColumn.FieldName]))
            {
                // If callout is pointing at another column - close it.
                if (_column != _dataGrid.CurrentColumn)
                {
                    _ClosePopup(true);
                    _callout = new Callout();
                }

                // If callout closed - open it and point at current cell.
                if (!_Callout.IsOpen)
                {
                    // Detect column to show callout.
                    var column = _dataGrid.CurrentColumn;
                    if (Address.IsAddressPropertyName(column.FieldName))
                        column = _GetFirstAddressColumn();

                    _InitCallout(column);
                }
            }
            // If callout closed - seek for item's invalid properties.
            else if (!_Callout.IsOpen && !string.IsNullOrEmpty(_InvalidItem.Error))
                _ShowCalloutOnInvalidItem(e.Item as IDataErrorInfo);

            // Subscribe to cell property changed events. Doing so we will know when user change active cell.
            DataRow row = _dataGrid.GetContainerFromItem(e.Item) as DataRow;

            // If grid view is table flow - even in editing state row can be null.
            if (row != null)
                foreach (var cell in row.Cells)
                    cell.PropertyChanged += new PropertyChangedEventHandler(_CellPropertyChanged);
        }
コード例 #2
0
 /// <summary>
 /// Close current popup, set new popup to _callout field.
 /// </summary>
 /// <param name="animate">Animate closing or not.</param>
 private void _ClosePopup(bool animate)
 {
     _Callout.Close(animate);
     _callout = new Callout();
 }