/// <summary>
/// Update the view from the view model
/// </summary>
private void UpdateFromViewModel()
{
if (DataContext is TextFormatterViewModel)
{
// Update the View from the ViewModel (ideally we would automatically data-bind to the RichTextBox,
// but this does not appear to be supported, so we do it manually here).
var textForDisplay = ((TextFormatterViewModel)DataContext).FormattedText;
BlockCollection blocks = MainTextBox.Document.Blocks;
for (int i = 0; i < blocks.Count && i < textForDisplay.Count; ++i)
{
if (blocks.ElementAt <Block>(i) is Paragraph)
{
// Clear all of the inlines from the paragraph and then add them back from textForDisplay
Paragraph p = (Paragraph)blocks.ElementAt <Block>(i);
p.Inlines.Clear();
foreach (var txtElem in textForDisplay[i])
{
p.Inlines.Add(new Run(txtElem.Item1)
{
Foreground = txtElem.Item2 ? Brushes.Red : Brushes.Black
});
}
}
}
}
}
/// <summary>
/// Removes an item at a specific index for a block collection.
/// </summary>
public static void RemoveAt(this BlockCollection collection, int index)
{
if (index == -1 || collection.Count == 0)
{
return;
}
collection.Remove(collection.ElementAt(index));
}
/// <summary>
/// Adds an item at a specific index for a block collection.
/// </summary>
public static void AddAt(this BlockCollection collection, int index, Block item)
{
if (index == -1)
{
return;
}
if (collection.Count == 0)
{
collection.Add(item);
return;
}
index = Math.Min(index, collection.Count - 1);
collection.InsertAfter(collection.ElementAt(index), item);
}
