public void AddPlaceHolder()
{
AddLabel("Place Holder");
var binding = new Binding("PlaceholderKey");
var grid = new Grid();
grid.RowDefinitions.Add(new RowDefinition());
grid.ColumnDefinitions.Add(new ColumnDefinition());
grid.ColumnDefinitions.Add(new ColumnDefinition
{
Width = GridLength.Auto
});
var textBox = new TextBox();
textBox.SetBinding(TextBox.TextProperty, binding);
textBox.VerticalAlignment = VerticalAlignment.Center;
grid.Children.Add(textBox);
textBox.SetValue(Grid.ColumnProperty, 0);
var button = new Button
{
Content = "Browse",
Width = 75,
Height = 23,
Margin = new Thickness(2, 0, 0, 0)
};
button.Click += delegate
{
var container = RenderingItem.RenderingContainer;
if (container == null)
{
return;
}
var key = RenderingItem.PlaceholderKey.ToString();
var dialog = new PlaceholderDialog();
dialog.Initialize(Resources.Browse, key, container);
if (AppHost.Shell.ShowDialog(dialog) != true)
{
return;
}
RenderingItem.PlaceholderKey = new PlaceHolderKey(dialog.SelectedValue);
UpdateTarget();
};
grid.Children.Add(button);
button.SetValue(Grid.ColumnProperty, 1);
Grid.Children.Add(grid);
bindings.Add(BindingOperations.GetBindingExpressionBase(textBox, TextBox.TextProperty));
}
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
Assert.ArgumentNotNull(context, nameof(context));
Assert.ArgumentNotNull(provider, nameof(provider));
var instance = context.Instance;
if (instance == null)
{
return(value);
}
IEnumerable <RenderingItem> renderingItems = null;
var renderingItem = instance as RenderingItem;
if (renderingItem != null)
{
renderingItems = new[]
{
renderingItem
};
}
var objects = instance as object[];
if (objects != null)
{
renderingItems = objects.OfType <RenderingItem>();
}
if (renderingItems == null || !renderingItems.Any())
{
return(value);
}
var container = renderingItems.First().RenderingContainer;
if (container == null)
{
return(value);
}
var key = string.Empty;
var placeHolderKey = value as PlaceHolderKey;
if (placeHolderKey != null)
{
key = placeHolderKey.Key ?? string.Empty;
}
var dialog = new PlaceholderDialog();
dialog.Initialize(Resources.Browse, key, container);
if (AppHost.Shell.ShowDialog(dialog) != true)
{
return(value);
}
return(new PlaceHolderKey(dialog.SelectedValue));
}
