private void OnSettingsChanged(DataGrid dataGrid, IFieldMapperGridViewModel fmgvm)
{
if (_updatePending)
{
return;
}
_updatePending = true;
BackgroundTaskManager.DelayedPostIfPossible(
() =>
{
_updatePending = false;
foreach (var column in dataGrid.Columns)
{
var matchingViewModelColumn = fmgvm.Columns.Where(col => col.Header == column.SortMemberPath).FirstOrDefault();
if (matchingViewModelColumn != null)
{
var pfd = new PrivateFieldData();
pfd.DisplayIndex = column.DisplayIndex;
pfd.SortDirection = column.SortDirection;
pfd.Visibility = column.Visibility;
matchingViewModelColumn.InternalProperties = pfd;
}
}
fmgvm.RaiseColumnSettingsChanged();
return(true);
});
}
private void RebuildDataGridColumns(IFieldMapperGridViewModel fmgvm, DataGrid dataGrid, PropertyDescriptor pd, FieldMapperGridControl host, bool updateFromInternalData = false)
{
int idx = 0;
dataGrid.Columns.Clear();
foreach (var column in fmgvm.Columns)
{
DataGridColumn dataGridColumn = null;
if (host.ItemTemplates.ContainsKey(column.Column))
{
dataGridColumn = new DataGridTemplateColumn()
{
CellTemplate = host.ItemTemplates[column.Column]
};
dataGridColumn.SortMemberPath = column.Column;
}
else if (host.ItemTemplates.ContainsKey(String.Empty))
{
dataGridColumn = new DataGridTemplateColumn()
{
CellTemplate = host.ItemTemplates[String.Empty]
};
dataGridColumn.SortMemberPath = column.Column;
}
else if (host.ItemTemplates.ContainsKey("Type:" + column.Type.FullName))
{
dataGridColumn = new CustomBoundColumn()
{
ContentTemplate = host.ItemTemplates["Type:" + column.Type.FullName], Binding = new Binding("Item[" + column.Column + "]")
};
dataGridColumn.SortMemberPath = column.Column;
}
else
{
dataGridColumn = new DataGridTextColumn()
{
Binding = new Binding("Item[" + column.Column + "]")
};
if (column.Type == typeof(DateTime))
{
(dataGridColumn as DataGridTextColumn).Binding.StringFormat = CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern + " " + CultureInfo.CurrentCulture.DateTimeFormat.LongTimePattern;
}
dataGridColumn.SortMemberPath = column.Column;
}
dataGridColumn.Header = column.Header;
dataGridColumn.Visibility = column.Visible ? Visibility.Visible : Visibility.Collapsed;
dataGridColumn.Width = new DataGridLength(column.Width);
pd.AddValueChanged(dataGridColumn, (ox, ax) =>
{
column.SuppressNotifications();
column.Width = dataGridColumn.Width.IsAuto ? dataGridColumn.Width.DisplayValue : dataGridColumn.Width.Value;
column.AllowNotifications();
});
column.PropertyChanged += (ox, ax) =>
{
if (ax.PropertyName == "Visible")
{
if (column.Visible == false)
{
BackgroundTaskManager.DelayedPostIfPossible(() => { RebuildDataGridColumns(fmgvm, dataGrid, pd, host, false); return(true); });
}
}
if (ax.PropertyName == "Width")
{
dataGridColumn.Width = new DataGridLength(column.Width);
}
};
BindingOperations.SetBinding(dataGridColumn, DataGridTemplateColumn.WidthProperty, new Binding()
{
Source = column.Width
});
dataGrid.Columns.Add(dataGridColumn);
++idx;
}
dataGrid.ColumnDisplayIndexChanged += (o, a) => OnSettingsChanged(dataGrid, fmgvm);
dataGrid.ColumnReordered += (o, a) => OnSettingsChanged(dataGrid, fmgvm);
dataGrid.Sorting += (o, a) => OnSettingsChanged(dataGrid, fmgvm);
dataGrid.Items.SortDescriptions.Clear();
foreach (var column in fmgvm.Columns)
{
var dataGridColumn = dataGrid.Columns.Where(item => item.SortMemberPath == column.Header).FirstOrDefault();
if (dataGridColumn == null)
{
continue;
}
var fromInternalData = column.InternalProperties as PrivateFieldData?;
if (fromInternalData != null)
{
try
{
dataGridColumn.SortDirection = fromInternalData.Value.SortDirection;
if (dataGridColumn.SortDirection.HasValue)
{
dataGrid.Items.SortDescriptions.Add(new SortDescription(dataGridColumn.SortMemberPath, dataGridColumn.SortDirection.Value));
}
if (updateFromInternalData)
{
dataGridColumn.Visibility = fromInternalData.Value.Visibility;
}
}
catch (Exception)
{
}
}
}
}