Custom ContextMenu for images in a RichTextBox - wpf

Question

Users can embed images to a RichTextBox - I add them in an InlineUIContainer.
I've added a custom ContextMenu to the InlineUIContainer, but when right-clicked
the standard RTB-contextmenu (cut, copy, paste) appears - not the custom one.
Why, and how can I fix this?
string fileName = openFileDialog.FileName;
BitmapImage bitmap = new BitmapImage(new Uri(fileName, UriKind.Absolute));
Image image = new Image();
image.Source = bitmap;
image.Width = bitmap.Width;
image.Height = bitmap.Height;
InlineUIContainer pix = new InlineUIContainer(image, rt.CaretPosition);
pix.BaselineAlignment = BaselineAlignment.Center;
pix.ContextMenu = (ContextMenu)this.Resources["imageContext"];

Answer 1

Right, this works - I had to recreate the all the "standard" context menu items, including the spellchecking ones (fortunately I found an example of that : )
private void rt_ContextMenuOpening(object sender, ContextMenuEventArgs e)
{
int index = 0;
MenuItem menuItem;
this.rt.ContextMenu.Items.Clear(); //Clearing the existing items
// right clicked on an image ?
int offZstart, offZend;
activeImg = null;
foreach (Block block in rt.Document.Blocks)
{
Paragraph p = block as Paragraph;
if (p != null)
{
foreach (Inline inline in p.Inlines)
{
InlineUIContainer iuic = inline as InlineUIContainer;
if (iuic != null)
{
offZstart = rt.Selection.Start.GetOffsetToPosition(iuic.ContentStart);
offZend = rt.Selection.End.GetOffsetToPosition(iuic.ContentEnd);
// if (rt.Selection.Contains(iuic.ContentStart))
if ((offZstart == 2 || offZstart == 1) && (offZend == -2 || offZend == -1))
{
if (iuic.Child is Border) // I wrap my images in borders
{
Border border = (Border)iuic.Child;
activeImg = (Image)border.Child;
MenuItem imageMenu = new MenuItem();
imageMenu.Header = "Image..";
this.rt.ContextMenu.Items.Insert(index++, imageMenu);
MenuItem borderItem = new MenuItem();
borderItem.Header = "Border";
borderItem.Click += imgBorderWidth;
imageMenu.Items.Add(borderItem);
MenuItem marginItem = new MenuItem();
marginItem.Header = "Margin";
marginItem.Click += imgMarginWidth;
imageMenu.Items.Add(marginItem);
MenuItem paddingItem = new MenuItem();
paddingItem.Header = "Padding";
paddingItem.Click += imgPaddingWidth;
imageMenu.Items.Add(paddingItem);
}
}
}
}
}
}
// spellchecking
SpellingError spellingError = this.rt.GetSpellingError(this.rt.CaretPosition);
if (spellingError != null && spellingError.Suggestions.Count() >= 1)
{
//Creating the suggestions menu items.
foreach (string suggestion in spellingError.Suggestions)
{
menuItem = new MenuItem();
menuItem.Header = suggestion;
menuItem.FontWeight = FontWeights.Bold;
menuItem.Command = EditingCommands.CorrectSpellingError;
menuItem.CommandParameter = suggestion;
menuItem.CommandTarget = this.rt;
this.rt.ContextMenu.Items.Insert(index++, menuItem);
}
//Getting the word to add/ignore
var word = this.rt.GetSpellingErrorRange(this.rt.CaretPosition);
this.rt.ContextMenu.Items.Insert(index++, new Separator());
//Adding the IgnoreAll menu item
MenuItem IgnoreAllMenuItem = new MenuItem();
IgnoreAllMenuItem.Header = "Ignore All ''"+word.Text+"''";
IgnoreAllMenuItem.Command = EditingCommands.IgnoreSpellingError;
IgnoreAllMenuItem.CommandTarget = this.rt;
this.rt.ContextMenu.Items.Insert(index++, IgnoreAllMenuItem);
this.rt.ContextMenu.Items.Insert(index++, new Separator());
//Add as new word in dictionary
MenuItem AddToDictionary = new MenuItem();
AddToDictionary.Header = "Add ''" + word.Text + "'' to dictionary";
AddToDictionary.Command = EditingCommands.IgnoreSpellingError;
AddToDictionary.CommandTarget = this.rt;
AddToDictionary.Click += (object o, RoutedEventArgs rea) =>
{
//this.AddToDictionary(word.Text);
MessageBox.Show("Want to add ''" + word.Text + "'' to dictionary\n- but don't know how..");
};
this.rt.ContextMenu.Items.Insert(index++, AddToDictionary);
this.rt.ContextMenu.Items.Insert(index++, new Separator());
}
//Cut
MenuItem cutMenuItem = new MenuItem();
cutMenuItem.Command = ApplicationCommands.Cut;
this.rt.ContextMenu.Items.Insert(index++, cutMenuItem);
//Copy
MenuItem copyMenuItem = new MenuItem();
copyMenuItem.Command = ApplicationCommands.Copy;
this.rt.ContextMenu.Items.Insert(index++, copyMenuItem);
//Paste
MenuItem pasteMenuItem = new MenuItem();
pasteMenuItem.Command = ApplicationCommands.Paste;
this.rt.ContextMenu.Items.Insert(index++, pasteMenuItem);
this.rt.ContextMenu.Items.Insert(index++, new Separator());
//Delete
MenuItem deleteMenuItem = new MenuItem();
deleteMenuItem.Command = EditingCommands.Delete;
this.rt.ContextMenu.Items.Insert(index++, deleteMenuItem);
this.rt.ContextMenu.Items.Insert(index++, new Separator());
//Select All
MenuItem selectAllMenuItem = new MenuItem();
selectAllMenuItem.Command = ApplicationCommands.SelectAll;
this.rt.ContextMenu.Items.Insert(index++, selectAllMenuItem);
}