[lazarus] Forms inside a library

[Marc Weustink]

At 02:24 17-3-2003 +1100, Steve Gatenby wrote:
>Is it possible to display forms contained in a library (lib***.so) ?
>I can use libraries for all non-graphical functions without problems, but 
>fail with "Gtk-Warning **: gtk_type_create(): type 'LCLWinapiWidget 
>already exists"
>
>Any ideas on this ??

At the time I wrote LCLWinapiWidget I wasn't a gtk expert (and that's still 
the case :), so the code there is merely based on examples and some GTK 
internals (I used gtkedit ? as an example).

However looking at it now I can imagine your problem. I wrote a little 
patch based on dox, but couldn't test it. So I didn't commit it to cvs. If 
you aply the patch and it works, please let me know.

Marc

<patch>
Index: gtkwinapiwindow.pp
===================================================================
RCS file: /FPC/CVS/projects/lazarus/lcl/interfaces/gtk/gtkwinapiwindow.pp,v
retrieving revision 1.43
diff -u -r1.43 gtkwinapiwindow.pp
--- gtkwinapiwindow.pp  30 Dec 2002 17:24:08 -0000      1.43
+++ gtkwinapiwindow.pp  16 Mar 2003 23:33:36 -0000
@@ -331,10 +331,11 @@
  end;

  function GTKAPIWidgetClient_GetType: Guint;
  const
+  TYPE_NAME = 'LCLWinapiClient';
    TheType: Guint = 0;
    Info: TGTKTypeInfo = (
-    type_name: 'LCLWinapiClient';
+    type_name: TYPE_NAME;
      object_size: SizeOf(TGTKAPIWidgetClient)+100;
      class_size: SizeOf(TGTKAPIWidgetClientClass)+100;
      class_init_func: @GTKAPIWidgetClient_ClassInit;
@@ -344,8 +345,12 @@
      base_class_init_func: nil;
    );
  begin
-  if (TheType = 0) then
-    TheType := gtk_type_unique(gtk_fixed_type, at Info);
+  if (TheType = 0)
+  then begin
+    TheType := gtk_type_from_name(TYPE_NAME);
+    if TheType = 0
+    then TheType := gtk_type_unique(gtk_fixed_type, at Info);
+  end;
    Result := TheType;
  end;

@@ -674,9 +679,10 @@

  function GTKAPIWidget_GetType: Guint;
  const
+  WAW_NAME = 'LCLWinapiWidget';
    wawType: Guint = 0;
    wawInfo: TGTKTypeInfo = (
-    type_name: 'LCLWinapiWidget';
+    type_name: WAW_NAME;
      object_size: SizeOf(TGTKAPIWidget)+100; // a TGTKScrolledWindow
      class_size: SizeOf(TGTKAPIWidgetClass)+100;
      class_init_func: @GTKAPIWidget_ClassInit;
@@ -687,7 +693,11 @@
    );
  begin
    if (wawType = 0)
-  then wawType := gtk_type_unique(gtk_scrolled_window_get_type, @wawInfo);
+  then begin
+    wawType := gtk_type_from_name(WAW_NAME);
+    if wawType = 0
+    then wawType := gtk_type_unique(gtk_scrolled_window_get_type, @wawInfo);
+  end;
    Result := wawType;
  end;
</patch>