public EditableTextBlockAdorner(EditableTextBlock adornedElement)
: base(adornedElement)
{
myTextBlock = adornedElement;
myTextBox = CreateTextBox(adornedElement);
myCollection = new VisualCollection(this);
myCollection.Add(myTextBox);
}
private TextBox CreateTextBox(EditableTextBlock adornedElement)
{
var textBox = new TextBox();
Binding binding = new Binding("Text")
{
Source = adornedElement,
UpdateSourceTrigger = UpdateSourceTrigger.Explicit
};
textBox.SetBinding(TextBox.TextProperty, binding);
textBox.AcceptsReturn = true;
textBox.MaxLength = adornedElement.MaxLength;
textBox.KeyUp += myTextBox_KeyUp;
textBox.LostFocus += myTextBox_LostFocus;
textBox.SelectAll();
return(textBox);
}
/// <summary>
/// Determines whether [is in edit mode update] [the specified obj].
/// </summary>
private static void IsInEditModeUpdate(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
EditableTextBlock textBlock = obj as EditableTextBlock;
if (textBlock == null)
{
return;
}
//Get the adorner layer of the uielement (here TextBlock)
AdornerLayer layer = AdornerLayer.GetAdornerLayer(textBlock);
//If the IsInEditMode set to true means the user has enabled the edit mode then
//add the adorner to the adorner layer of the TextBlock.
if (textBlock.IsInEditMode)
{
if (null == textBlock.myAdorner)
{
textBlock.myAdorner = new EditableTextBlockAdorner(textBlock);
}
layer.Add(textBlock.myAdorner);
}
else
{
//Remove the adorner from the adorner layer.
Adorner[] adorners = layer.GetAdorners(textBlock);
if (adorners != null)
{
foreach (Adorner adorner in adorners)
{
if (adorner is EditableTextBlockAdorner)
{
layer.Remove(adorner);
}
}
}
}
}