/// <summary>
/// Creates a combo box with data binding.
/// </summary>
/// <param name="d">The cell definition.</param>
/// <returns>
/// A ComboBox.
/// </returns>
protected virtual FrameworkElement CreateComboBox(SelectorCellDefinition d)
{
var c = new ComboBox
{
IsEditable = d.IsEditable,
Focusable = false, // keep focus on the data grid until the user opens the dropdown
Margin = new Thickness(1, 1, 0, 0),
HorizontalContentAlignment = d.HorizontalAlignment,
VerticalContentAlignment = VerticalAlignment.Center,
Padding = new Thickness(3, 0, 3, 0),
BorderThickness = new Thickness(0)
};
if (d.ItemsSource != null)
{
c.ItemsSource = d.ItemsSource;
}
else
{
if (d.ItemsSourceProperty != null)
{
var itemsSourceBinding = new Binding(d.ItemsSourceProperty);
c.SetBinding(ItemsControl.ItemsSourceProperty, itemsSourceBinding);
}
}
c.DropDownOpened += (s, e) =>
{
// when the dropdown has been opened by F4 or mouse down
// it should be possible to change selection by the arrow keys
// or edit the text (if the property is annotated as editable)
c.Focusable = true;
};
c.DropDownClosed += (s, e) =>
{
// when the dropdown has been closed
// the arrows keys should be used to change cell
// the (undesired) side effect is also that the text cannot be edited (if the property is annotated as editable)
c.Focusable = false;
FocusParentDataGrid(c);
};
var binding = this.CreateBinding(d);
binding.NotifyOnSourceUpdated = true;
c.SetBinding(d.IsEditable ? ComboBox.TextProperty : Selector.SelectedValueProperty, binding);
c.SelectedValuePath = d.SelectedValuePath;
c.DisplayMemberPath = d.DisplayMemberPath;
this.SetIsEnabledBinding(d, c);
this.SetBackgroundBinding(d, c);
return(c);
}
/// <summary>
/// Creates a text block control for a selector cell.
/// </summary>
/// <param name="d">The cell definition.</param>
/// <returns>
/// A TextBlock.
/// </returns>
protected virtual FrameworkElement CreateTextBlockControl(SelectorCellDefinition d)
{
var c = new TextBlockEx
{
HorizontalAlignment = d.HorizontalAlignment,
VerticalAlignment = VerticalAlignment.Center,
Padding = new Thickness(4, 0, 4, 0)
};
var binding = this.CreateOneWayBinding(d);
if (!string.IsNullOrEmpty(d.DisplayMemberPath) && string.IsNullOrEmpty(d.SelectedValuePath))
{
binding.Path.Path += "." + d.DisplayMemberPath;
}
c.SetBinding(TextBlock.TextProperty, binding);
this.SetIsEnabledBinding(d, c);
return(this.CreateContainer(d, c));
}