// Update font family list based on selection.
// Return list item if there's an exact match, or null if not.
private FontFamilyListItem SelectFontFamilyListItem(FontFamily family)
{
FontFamilyListItem listItem = fontFamilyList.SelectedItem as FontFamilyListItem;
if (listItem != null && listItem.FontFamily.Equals(family))
{
// Already selected
return(listItem);
}
else if (SelectListItem(fontFamilyList, FontFamilyListItem.GetDisplayName(family)))
{
// Exact match found
return(fontFamilyList.SelectedItem as FontFamilyListItem);
}
else
{
// Not in the list
return(null);
}
}
// Handle changes to the SelectedFontFamily property
private void OnSelectedFontFamilyChanged(FontFamily family)
{
// If the family list is not valid do nothing for now.
// We'll be called again after the list is initialized.
if (_familyListValid)
{
// Select the family in the list; this will return null if the family is not in the list.
FontFamilyListItem item = SelectFontFamilyListItem(family);
// Set the text box to the family name, if it isn't already.
string displayName = (item != null) ? item.ToString() : FontFamilyListItem.GetDisplayName(family);
if (string.Compare(fontFamilyTextBox.Text, displayName, true, CultureInfo.CurrentCulture) != 0)
{
fontFamilyTextBox.Text = displayName;
}
// The typeface list is no longer valid; update it in the background to improve responsiveness.
InvalidateTypefaceList();
}
}
