Help Needed for Win32 GtkAda "Paste" to Clipboard

* Help Needed for Win32 GtkAda "Paste" to Clipboard
@ 2001-03-05  2:06 Warren W. Gay VE3WWG
  2001-03-05 10:09 ` David C. Hoos, Sr.
  0 siblings, 1 reply; 2+ messages in thread
From: Warren W. Gay VE3WWG @ 2001-03-05  2:06 UTC (permalink / raw)

Ok.. I surrender. I've beat my brain against the wall to much
on this one already....

What I want to do, is paste a password(string) from my GtkAda 
key_chain app, to the Windows clipboard. I've seen some
pretty complicated Drag and Drop code etc., and even some cut
and paste code in C, for Gtk+.  However, I am still not getting
very far in my attempt to paste a simple string to the clipboard.

If someone has better GtkAda instructions/example code somewhere,
that would help. The GtkAda documentation doesn't tell you enough,
and what I could find, the examples don't cut it either. Even worse,
I suspect that the "procedure" has changed, but the documentation
has not kept pace.

DESCRIPTION:

In my Main_Win_Pkg, I have:

  The_Clipboard: Gdk_Selection;

delcared in the spec. It is initialized, with:

  The_Clipboard := Gdk.Property.Atom.Itern("CLIPBOARD");

Later, after the windows 'n widgets are created, I have:

   Add_Target(Main_Win.Ed_Password,The_Clipboard,Target_String,1);

   Return_Callback.Connect
     (Main_Win.Ed_Password, "selection_clear_event",                        
On_Cb_Copy_Password_Selection_Clear_Event'Access);

   Entry_Callback.Connect
     (Main_Win.Ed_Password, "selection_get", 
      On_Cb_Copy_Password_Selection_Get'Access);

The widget Main_Win.Ed_Password is a Gtk_Entry widget.

With these calls in place, I now finally get the "selection_get" event
and callback (the C example I had used a checkbox, but they don't get
these events anymore it seems).

The On_Cb_Copy_Password_Selection_Get callback, looks as follows:

   procedure On_Cb_Copy_Password_Selection_Get
     (Object : access Gtk_Entry_Record'Class;
      Params : Gtk.Arguments.Gtk_Args)
   is
      Data :   Selection_Data := Selection_Data( To_C_Proxy(Params,1) );
      Arg2 : Guint := To_Guint (Params, 2);
      Arg3 : Guint := To_Guint (Params, 3);
   begin
      Selection_Data_Set(Data,Selection_Type_String,8,"<TEST-PASTE>");
   end On_Cb_Copy_Password_Selection_Get;

The ownership of the clipboard is established in the toggle-button's
callback as follows:

Flg := Owner_Set(Gtk_Widget(Main_Win.Ed_Password),The_Clipboard);

With this code, I now get a paste of the string "<TEST-PASTE>" to 
appear in notepad. HOWEVER, when I select a piece
of text in notepad (or anywhere else), I do _NOT_ get the 
"selection_clear_event" callback event.

Even worse, when I exit my
app, and restart it, then attempt to paste into the same notepad (that
was still running), it then pauses for a time, and then brings up a
printer dialog after I have pressed Shift-INS in notepad. Clearly, things
are not working correctly yet.

These experiences are occurring under Windows 2000, using GNAT 3.13p
using GtkAda 1.2.10.

I get the feeling that the whole cut and paste "procedure" underwent
some change in GtkAda and/or Gtk+, but can find mightly little 
documentation on this. I only need to "copy" a string to the clipboard.
Nothing else.

TIA, Warren.
-- 
Warren W. Gay VE3WWG
http://members.home.net/ve3wwg

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