void OnExpressionEditorLoaded(object sender, RoutedEventArgs e)
{
ExpressionTextBox expressionTextBox = sender as ExpressionTextBox;
Fx.Assert(expressionTextBox != null, "sender should be userControl");
//bind ExpressionProperty of Expression textbox to ModelItem.Condition
Binding b = new Binding();
ArgumentToExpressionConverter argumentToExpressionConverter = new ArgumentToExpressionConverter();
b.Converter = argumentToExpressionConverter;
b.Mode = BindingMode.TwoWay;
b.Source = this.ModelItem;
b.Path = new PropertyPath("Condition");
if (BindingOperations.GetBinding(expressionTextBox, ExpressionTextBox.ExpressionProperty) != null)
{
BindingOperations.ClearBinding(expressionTextBox, ExpressionTextBox.ExpressionProperty);
}
expressionTextBox.SetBinding(ExpressionTextBox.ExpressionProperty, b);
//bind OwnerActivityProperty of Expression textbox to ModelItem
Binding b1 = new Binding();
b1.Source = this.ModelItem;
if (BindingOperations.GetBinding(expressionTextBox, ExpressionTextBox.OwnerActivityProperty) != null)
{
BindingOperations.ClearBinding(expressionTextBox, ExpressionTextBox.OwnerActivityProperty);
}
expressionTextBox.SetBinding(ExpressionTextBox.OwnerActivityProperty, b1);
}
private void UpdateBinding()
{
if (ExpressionTextBox == null || SelectedCell == null)
{
return;
}
ExpressionTextBox.GetBindingExpression(TextBox.TextProperty)?.UpdateSource();
BindingOperations.ClearBinding(ExpressionTextBox, TextBox.TextProperty);
Binding textBinding = null;
if (SelectedCell.IsEditable)
{
textBinding = new Binding("Text")
{
Source = SelectedCell.ContentBox,
Mode = BindingMode.TwoWay,
UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
};
}
else
{
textBinding = new Binding("ExpressionStr")
{
Source = SelectedCell.DataContext,
Mode = BindingMode.OneWay,
UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
};
}
ExpressionTextBox.SetBinding(TextBox.TextProperty, textBinding);
}