How can I tell if a freetext annotation contains more text than what's displayed?

[Aaron]

Q:

I want to detect whenever a freetext annotation contains more text than what's displayed in its appearance, so that I can indicate that to my users.  How can I detect that?

A:

Code similar to the following should work for you:

Page first_page = doc.GetPage(1);

FreeText ft = FreeText.Create(doc, new Rect(10, 10, 100, 100));

String contents = "asdf asdf asdf asdf asdf";

int num_visible_chars = 0;

ft.SetContents(contents);

first_page.AnnotPushBack(ft);

ft.RefreshAppearance();

Obj app_stm = ft.GetAppearance();

if (app_stm != null)

{ 

ElementReader reader = new ElementReader(); 

reader.Begin(app_stm); 

Element element; 

while ((element = reader.Next()) != null) 

{

if (Element.Type.e_text != element.GetType()) continue;

Matrix2D ctm = element.GetCTM();

Matrix2D text_mtx = element.GetTextMatrix();

Matrix2D mtx = ctm * text_mtx;

double x, y;

for (CharIterator itr = element.GetCharIterator(); itr.HasNext(); itr.Next()) 

{

num_visible_chars++;

x = itr.Current().x;

y = itr.Current().y; 

mtx = ctm * text_mtx;

mtx.Mult(ref x, ref y);

Console.WriteLine("{3} Position of {2}: x={0:f} y={1:f}", x, y, itr.Current().char_code, num_visible_chars);

}

}

if (contents.Length > num_visible_chars) Console.WriteLine("It seems the contents are larger than what is displayed within the annotation");

reader.End();

}