I may be completely imagining this, but I could have sworn there was a way to make individual Run (or Parapgraph) elements in a RichTextBox read-only. I also could have sworn I tried a method for doing this out myself a few weeks ago and was satisfied with the results - I vaguely remember it looked something like this:
<RichTextBox x:Name="richTextBox"
AcceptsTab="True"
AcceptsReturn="True"
FontFamily="Courier New"
FontSize="14">
<FlowDocument>
<Paragraph>
<Run IsReadOnly="True">I wish this was read-only!</Run>
</Paragraph>
</FlowDocument>
</RichTextBox>
Now, a few weeks later, I go to try to make Run elements read-only in a RichTextBox only to find it doesn't seem to be possible.
This post on the MSDN forums seems to confirm that.
Did I completely imagine this? Or is there a way to do what I want to do?
Alright, I've come up with a solution that works for my case - but may not work for everyone who wants something like this. It's messy, but it does the job.
I'm not going to accept my own answer for a few days, just in case someone else has a better way of accomplishing this.
Here we go, first, the XAML:
<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1"
Height="500"
Width="600">
<DockPanel LastChildFill="True">
<RichTextBox x:Name="rtb"
FontFamily="Courier New"
FontSize="14"
PreviewKeyDown="rtb_PreviewKeyDown">
<FlowDocument>
<Paragraph>
<InlineUIContainer Unloaded="InlineUIContainer_Unloaded">
<TextBlock FontFamily="Courier New" FontSize="14">This line of text is not editable.</TextBlock>
</InlineUIContainer>
<Run Foreground="Blue">But this is editable.</Run>
</Paragraph>
</FlowDocument>
</RichTextBox>
</DockPanel>
</Window>
And the code behind:
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
namespace WpfApplication1
{
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
private void InlineUIContainer_Unloaded(object sender, RoutedEventArgs e)
{
(sender as InlineUIContainer).Unloaded -= new RoutedEventHandler(InlineUIContainer_Unloaded);
TextBlock tb = new TextBlock();
tb.FontFamily = new FontFamily("Courier New");
tb.FontSize = 14;
tb.Text = "This line of text is not editable.";
TextPointer tp = rtb.CaretPosition.GetInsertionPosition(LogicalDirection.Forward);
InlineUIContainer iuic = new InlineUIContainer(tb, tp);
iuic.Unloaded += new RoutedEventHandler(InlineUIContainer_Unloaded);
}
private void rtb_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
var newPointer = rtb.Selection.Start.InsertLineBreak();
rtb.Selection.Select(newPointer, newPointer);
e.Handled = true;
}
}
}
}
My solution relies on the fact that when an InlineUIContainer
is removed from the UI, it's Unloaded()
method is called. At that point, I simply reinsert the deleted InlineUIContainer
at the current caret position.
As with any hack, there are a bunch of disadvantages. The disadvantages I'm finding are the following:
InlineUIContainer
. That is a little limiting for this solution.InlineUIContainer.Unloaded()
keeps firing everytime the Enter key is pressed. Not fun, but it works for my case.It's not a great solution, but I think it will work for me. Like I said, I'm not going to mark this as an answer to my own question yet - hopefully someone else will have a better way of doing this.