14. Transitioning from GtkAda 2 to GtkAda 3

14.1. General

GtkAda 3.x is a binding to the C library gtk+ 3.x. This is a major release, with several incompatible changes. Most of those incompatibilities are due to major changes in the C library. Mostly, the gtk+ developers have performed a general cleanup, removing old types and subprograms that were rarely used and belong to more specialized libraries.

They have also made significant changes in the internals of the library. A lot of these changes should not impact typical user code, although they will if you are writting your own container widgets.

The gtk+ developers have documented various things that will likely need to be changed in user applications. The page at http://developer.gnome.org/gtk3/3.3/gtk-migrating-2-to-3.html provides a migration guide. Its code samples are in C, but should be applicable to Ada quite easily.

GtkAda itself has also undergone its own changes. One of the most significants is that most of the binding is now automatically generated from XML files provided by the gtk+ developers. This ensures that the binding is much more complete than it was before, and will be much easier to evolve when new releases of gtk+ are made available.

It also means that users can, theoritically at least, automatically bind a number of libraries from the gtk+/GNOME ecosystem. The automatic generation relies on XML files, called GIR files from their .gir extension. If you wish to parse other files, you should likely modify the toplevel Makefile (the generate target), as well as the file contrib/data.py to list which types should be bound. We do not necessarily encourage you to generate your own bindings, and this generation is likely to be more than just modifying one or two files…

14.1.1. Interfaces

One other advantage of the automatic generation is that it allows us to provide more advanced feature in the binding.

For instance, gtk+ has the notion of interfaces (which play a similar role to Ada05 interfaces).

In GtkAda interfaces no longer require an explicit “with” of the interface package, and a cast to the interface type (with “-” and “+”). Instead, each package now contains the list of subprograms inherited from the various interfaces.

So basically, all subprograms inherited from an interface become available as primitive operations in the types that implement the interface.

We also expect to simplify the handling of signals and signal handlers.

14.1.2. Ada 2012

GtkAda 3 makes use of Ada 2012 and requires GtkAda applications to be compiled in Ada 2012 mode (e.g. using the -gnat2012 switch).

This makes it possible to use the object-dotted notation when calling primitive operations. For instance, the following code:

Gtk.Window.Set_Default_Size (Window, 800, 600);

can be replaced with:

Window.Set_Default_Size (800, 600);

14.2. Pango

14.2.1. Pango.Font

The type Pango_Font_Metrics is now declared in its own package Pango.Font_Metrics.

The type Pango_Font_Face is now declared in its own package Pango.Font_Face.

The type Pango_Font_Family is now declared in its own package Pango.Font_Family.

The type Pango_Language is now declared in its own package Pango.Language.

14.3. Glib

14.3.1. Glib.Object

Initialize_Class_Record’s profile was changed to follow more closely what is done for C applications. The previous implementation prevented applications from implementing interfaces because some internal gtk+ data had to be initialized too early. See glib-object.ads for an extensive documentation.

14.3.2. Glib.G_Icon

This type is now a GType_Interface. Instead of using Null_G_Icon, use Glib.Types.Null_Interface.

14.4. Gdk

14.4.1. Gdk.Bitmap

This package has been removed: Cairo packages should be used for drawing, and Gdk.Pixbuf for representing image data in memory.

14.4.2. Gdk.Color

Alloc no longer exists, and is not necessary since all drawing is now done internally using Cairo which directly manipulates red/green/blue.

14.4.3. Gdk.Cursor

The Gdk_New function working on Gdk_Pixmap has been removed. Use Gdk.Pixbuf.Gdk_New_From_Pixbuf to create a cursor from a pixbuf.

The Gdk_New function working on a String has also been removed.

A Gdk_Cursor is now derived from a Glib.Object. This has little impact on programs, except that Null_Cursor can be replaced simply by “null”.

Destroy was removed, and should be replaced with Unref.

14.4.4. Gdk.Dnd

The functions for handling Drag_Contexts have been moved to new package Gdk.Drag_Contexts.

The Gdk_Drag_Context itself now inherits from GObject, which means that it no longer requires its own Ref/Unref functions.

Drag_Find_Window has been removed, use Drag_Find_Window_For_Screen instead.

Drag_Get_Protocol has been replaced with Drag_Context_Get_Protocol.

14.4.5. Gdk.Drawable

All Draw_* subprograms have been removed: use Cairo for low-level drawing.

The type Gdk_Drawable no longer exists.

14.4.6. Gdk.Event

A lot of the getters (and all of the setters) were removed. Instead, the Gdk_Event type fields can now be edited directly. This is slightly more efficient, and more importantly better documents which fields are valid for which event types.

The APIs to Get_Message_Type, Set_Message_Type, Get_Data, and Set_Data have been removed without replacement.

Get_Graphics_Expose and Send_Client_Message have been removed with no replacement.

Deep_Copy was removed. It is now possible to simply use “:-” on the record type itself.

Get and Peek are now functions instead of procedures with a single out parameter.

Is_Created has been removed (you can compare with null) Send_Client_Message_To_All has been removed (deprecated in gtk+)

Allocate has been removed. Instead, users should directly use Gdk.Event.Gdk_New and set the appropriate fields.

Get_X and Get_Y were replaced by Get_Coords. Get_X_Root and Get_Y_Root were replaced by Get_Root_Coords

Get_Button, Get_State, Get_Key_Val and Get_Keycode were kept (so you do not have to directly access the field of Gdk_Event). However, they no longer raise an exception if you pass them an invalid event type, but return an out-of-range value.

14.4.7. Gdk.Font

This package has been removed: use Pango.Font for fonts manipulation, Cairo.Font_Face and Cairo.Font_Options for text rendering.

14.4.8. Gdk.GC

This package has been removed: Cairo packages should be used for drawing.

14.4.9. Gdk.Image

This package has been removed: use a Gdk.Pixbuf instead.

14.4.10. Gdk.Main

Set_Locale functions are no longer needed and have been removed.

Functions Set_Use_Xshm and Get_Use_Xshm have been removed.

14.4.11. Gdk.Pixbuf

Render_Threshold_Alpha, Render_To_Drawable, Render_To_Drawable_Alpha, Render_Pixmap_And_Mask, Render_Pixmap_And_Mask_For_Colormap have been removed.

Use APIs provided by Gdk.Cairo to draw a pixbuf on a Gdk_Drawable.

Get_From_Drawable has been removed, use Get_From_Surface or Get_From_Window.

14.4.12. Gdk.Pixmap

This package has been removed: Cairo packages should be used for drawing, and Gdk.Pixbuf for representing image data in memory.

14.4.13. Gdk.Region

This package has been removed and replaced with Cairo_Region.

14.4.14. Gdk.RGB

This package is deprecated in gtk3. Use Pixmaps/Cairo for drawing, and use Gdk.Pixbuf for offscreen image manipulation and rendering to drawables.

Instead of Gdk.Rgb.Get_Cmap, use Gtk.Widget.Get_Default_Colormap.

14.4.15. Gdk.Window

A Gdk_Window now derives from GObject. This is mostly transparent for applications, unless you are passing a Gdk_Window directly to C code, in which case you must use Get_Object() on it.

Copy_Area and Set_Back_Pixmap have been removed: use Gdk_Drawable and Gdk.Cairo functions instead.

Clear_Area and Clear_Area_E were removed. Use Cairo for all drawings.

Get_Desk_Relative_Origin: this function has been removed without a replacement.

Get_Toplevels has been removed, use Gtk.Window.List_Toplevels instead.

Set_Hints has been removed. Depending on what you are trying to do, use Gtk.Window.Resize, Gtk.Window.Set_Size_Request, Gtk.Window.Move, Gtk.Window.Parse_Geometry, and Gtk.Window.Set_Geometry_Hints.

Window_At_Pointer was renamed to At_Pointer.

Get_Origin is now a procedure, because the return value had no meaning anyway.

Get_Geometry: no longer returns the color depth of the window, which is no longer relevant to gtk+.

The first parameter of the various methods was renamed “Self" instead of “window” to avoid a number of cases where we would end up with duplicate parameter names.

14.4.16. Gdk.Window_Attr

Parameter “Colormap" has been removed from procedure Gdk_New. This parameter: is no longer needed.

Set_Colormap and Get_Colormap should no longer be needed and have been removed as well.

14.5. Gtk

14.5.1. Gtk.Action

Block_Activate_From, Unblock_Activate_From, Connect_Proxy, Disconnect_Proxy: these obsolete subprograms have been removed without a replacement.

Get_Action has been removed without a replacement.

Convert has been removed, use Glib.Object.Get_User_Data instead.

14.5.2. Gtk.Aspect_Frame

Direct accessors Get_Xalign, Get_Yalign and Get_Ratio have been removed: use the corresponding properties instead.

14.5.3. Gtk.Assistant

The values in Gtk_Assistant_Page_Type were renamed for consistency, removing their Gtk_ prefix.

The package Generic_Assistant_Functions has been renamed to Set_Forward_Page_Func_User_Data.

14.5.4. Gtk.Builder

Add_From_File now returns a Guint and the error as a parameter.

Get_Widget has been removed (use Get_Object instead, and cast to the appropriate type)

14.5.5. Gtk.Button_Box

Set_Child_Size was removed. Equivalent behavior can only be done by changing the theme properties child-min-width and child-min-height.

14.5.6. Gtk.Cell_Layout

Get_Cell_Renderers has been renamed to Get_Cells.

14.5.7. Gtk.Cell_Renderer

The Render subprogram is now called with a Cairo_Context rather than a Gdk_Window.

14.5.8. Gtk.Cell_View

Get_Cell_Renderers is obsolete, use the Gtk.Cell_Layout interface and Gtk.Cell_Layout.Get_Cells.

14.5.9. Gtk.Clist

This widget has been removed: use a Gtk.Tree_View instead.

14.5.10. Gtk.Container

Procedure Propagate_Expose has been removed and will be replaced with Propagate_Draw.

Class_Find_Child_Property, Class_list_Child_Properties and Class_Install_Child_Property are no longer bound.

Children was removed (use Get_Children instead).

14.5.11. Gtk.Color_Button

The function Get_Color returning Gdk.Color.Gdk_Color is now a procedure with an out parameter.

14.5.12. Gtk.Color_Selection

Get_Color and Set_Color have been removed: use Get_Current_Color and Set_Current_Color instead.

14.5.13. Gtk.Color_Selection_Dialog

Subprogram Get_Colorsel has been renamed Get_Color_Selection, to match the Gtk+ naming.

Get_OK_Button, Get_Cancel_Button, Get_Help_Button have been removed. Instead, use:

Gtk_Button (Glib.Properties.Get_Property (Dialog, Ok_Button_Property)),
Gtk_Button (Glib.Properties.Get_Property (Dialog, Cancel_Button_Property)),
Gtk_Button (Glib.Properties.Get_Property (Dialog, Help_Button_Property))

14.5.14. Gtk.Combo

This widget has been removed: use a Gtk.Combo_Box instead.

14.5.15. Gtk.Combo_Box

The “text only” variant has been moved to the new package Gtk.Combo_Box_Text.

14.5.16. Gtk.Combo_Box_Entry

This widget has been removed: use a Gtk.Combo_Box instead.

14.5.17. Gtk.Clipboard

The base type is now a GObject_Record instead of an opaque type: use the GObject facilities for lifecycle management.

There are now separate “User_Data" generic version for callback-based methods.

14.5.18. Gtk.Ctree

This widget has been removed: use a Gtk.Tree_View instead.

14.5.19. Gtk.Curve

This widget has been removed, with no direct replacement. Use drawing functionality from Cairo instead.

14.5.20. Gtk.Dialog

Subprogram Get_Vbox was replaced with Get_Content_Area.

Subprogram Set_Has_Separator has been removed: use the corresponding flag in the call to Gtk_New/Initialize instead.

14.5.21. Gtk.Dnd

Source_Set_Icon has been removed: use Source_Set_Icon_Pixbuf instead. Set_Icon_Pixmap has been removed: use Set_Icon_Pixbuf instead.

Obsolete Set_Default_Icon working on Gdk.Pixmap has been removed without a replacement.

14.5.22. Gtk.Editable

The type representing a Gtk_Editable_Record has been changed from a Widget (which is a GObject) to an interface (a System.Address). Therefore the Gtk_Editable_Record type has been eliminated. User code referencing only the Gtk_Editable type should function unchanged.

Code using the tag as a test before converting a widget to a Gtk.Editable can now work using the Implements_Editable package.

For instance, if Widget is a GObject_Record, the following code:

if Widget.all in Gtk_Editable_Record'Class then
   Cut_Clipboard (Gtk_Editable (Widget));

becomes:

if Is_A (Widget.Get_Type, Gtk.Editable.Get_Type) then
   Cut_Clipboard`` (+Widget);

where the function “+” is defined by instantiating Implements_Editable:

package Implements_Editable is new Glib.Types.Implements
  (Gtk.Editable.Gtk_Editable, GObject_Record, GObject);
function "+"
  (Widget : access GObject_Record'Class)
   return Gtk.Editable.Gtk_Editable
   renames Implements_Editable.To_Interface;

The Select_Region subprogram parameter name The_End has been normalized to End_Pos.

14.5.23. Gtk.Entry_Completion

The “match-selected” and “cursor-on-match” signals were erroneously given the internal filter model instead of the users model. This oversight has been fixed in GTK+ 3; if you have handlers for these signals, they will likely need slight adjustments.

14.5.24. Gtk.Enums

The following types were removed:

``GtkAnchorType``
``GtkCurveType``
``GtkMetricType``
``GtkGridLines``
``GtkUpdateType``
``GtkVisibility``
``GtkSideType``
``GtkMatchType``
``GtkPreviewType``
``GtkSubmenuDirection``
``GtkSubmenuPlacement``
``GtkTreeViewMode``

Gtk_Icon_Size is no longer an enumeration type, but an integer, so that new sizes can be defined through Gtk.Icon_Factory.Icon_Size_Register.

14.5.25. Gtk.File_Chooser_Button

Subprograms Gtk_New_With_Backend and Initialize_With_Backend have been removed: use Gtk_New and Initialize instead.

14.5.26. Gtk.File_Chooser_Dialog

Subprograms Gtk_New_With_Backend and Initialize_With_Backend have been removed: use Gtk_New and Initialize instead.

14.5.28. Gtk.File_Selection

This package has been replaced by Gtk.File_Chooser. You may also use Gtkada.File_Selection for a simple interface to the Gtk.File_Chooser.

14.5.29. Gtk.Fixed

Subprograms Set_Has_Windows and Get_Has_Windows are now in Gtk.Widget.

14.5.30. Gtk.Gamma_Curve

This widget has been removed without any replacement.

14.5.31. Gtk.GC

This package has been removed: Cairo packages should be used for drawing.

14.5.32. Gtk.GEntry

The names for Gtk_Entry_Record parameters have been normalized across the board to “The_Entry".

Append_Text has been removed: use Set_Text and Get_Text instead.

14.5.33. Gtk.GRange

Set_Update_Policy has been removed, with no replacement. If you require delayed updates, you will need to code it yourself.

14.5.34. Gtk.Handle_Box

This package is now marked as deprecated in C, and is likely to be removed in future versions of gtk+, so we encourage you to stop using it as well.

14.5.35. Gtk.HRuler

This widget has been removed without any replacement.

14.5.36. Gtk.Icon_Factory

Gtk_Icon_Set and Gtk_Icon_Source have been moved to their own packages. Functions Gtk_New are now procedures.

14.5.37. Gtk.Image

The subprograms working with Gdk_Pixmap have been removed, use the variants working on Gdk_Pixbuf instead.

14.5.39. Gtk.Input_Dialog

This package is no longer part of gtk+, so this binding has been removed without replacement.

14.5.40. Gtk.Item

This obsolete package has been removed with no replacement.

14.5.41. Gtk.Item_Factory

This obsolete package has been removed in favor of Gtk.UI_Manager.

14.5.42. Gtk.Layout

Get_Width and Get_Height have been removed, use Get_Size instead.

14.5.43. Gtk.Link_Button

All widget parameter names have been normalized to “Self".

The Set_Uri_Hook function has been eliminated, and along with it the Uri_Func type and the Generic_Uri_Hook package. Register a callback for the button’s “clicked” signal instead.

14.5.44. Gtk.List_Item

This widget has been removed: use a Gtk.Tree_View instead.

14.5.45. Gtk.Main

Do_Event was renamed Main_Do_Event.

Grab_Add and Grab_Removed are available in Gtk.Widget (as was already: the case with gtk2).

The Quit package has been removed without replacement.

The Idle and Timeout handling been removed: use equivalent functions in package Glib.Main instead.

14.5.47. Gtk.Menu_Item

For subprogram Set_Right_Justified, the parameter “Justify" has been renamed to “Right_Justified".

The obsolete procedures Remove_Submenu, Set_Right_Justify, and Right_Justify have been removed. Instead, use Set_Submenu, Set_Right_Justified, or Set_Right_Justified with Justify-True, respectively.

Calling Gtk_New with one Menu_Item argument has the same effect now as before. However, from this version on, if a Label argument exists (even if set to “”), a Gtk_Label child will be created with the given value.

14.5.49. Gtk.Notebook

Get_Children has been removed: call Gtk.Container.Get_Children instead.

Set_Tab_Label_Packing has been removed (this is left under control of the theme).

Set_Page has been removed, use Set_Current_Page instead.

Insert_Page now returns the number of the page that has been inserted.

14.5.50. Gtk.List

This package has been removed: use a Gtk_Tree_View instead.

14.5.51. Gtk.Object

Gtk.Object has been removed in gtk+-3.

The following subprograms and declarations are now in Gtk.Widget:

``Flags``
``Unset_Flags``

``Floating``
``In_Destruction_Is_Set``

``Signal_Destroy``

The subprogram Gtk.Object.Sink has been removed: use Glib.Object.Ref_Sink: instead.

14.5.52. Gtk.Old_Editable

This obsolescent API has been removed, use Gtk.Editable where relevant.

14.5.54. Gtk.Pixmap

This widget has been removed and is generally replaced with a Gtk.Image.

14.5.55. Gtk.Preview

This widget has been removed without replacement.

14.5.56. Gtk.Print_Operation

Get_Status was renames to Get_Status_String when it returns a string, to match the gtk+ API.

14.5.57. Gtk.Progress

This widget has been removed without any replacement.

14.5.58. Gtk.Progress_Bar

This widget is now derived from Gtk.Widget directly, rather than from Gtk.Progress (which has been removed).

The enumeration type Gtk_Progress_Bar_Orientation has been removed, and this widget now implements the Gtk_Orientable interface. To fully achieve the same functionality as the GtkAda 2.x Get_Orientation/ Set_Orientation subprograms, it is now necessary to call Get_Orientation/Set_Orientation along with Get_Inverted/Set_Inverted.

Procedure Set_Pulse_Step's “Step" parameter has been renamed to “Formal."

Set_Ellipsize and Get_Ellipsize parameter names have been normalized from “Pbar" to “Progress_Bar".

If you intend to show text over the progress bar, you need to call Set_Text as before, but also call Set_Show_Text(True).

14.5.59. Gtk.Rc

This package is now mostly obsolete. The gtk+ library no longer supports the *.rc files, since it uses CSS-like files instead.

14.5.60. Gtk.Recent_Manager

The type Gtk_Recent_Info is now bound in its own package.

14.5.61. Gtk.Ruler

This widget has been removed without any replacement.

14.5.62. Gtk.Settings

Properties are now named with the suffix “_Property”. For instance, Gtk_Theme_Name is now Gtk_Theme_Name_Property.

14.5.63. Gtk.Scale_Button

This package now conforms to the API conventions practiced throughout the rest of the toolkit. Gtk_New is implemented as a procedure rather than as a function, and the use of GNAT.Strings.String_List replaces Gtkada.Types.Chars_Ptr_Array throughout.

14.5.64. Gtk.Selection

This package has been renamed Gtk.Selection_Data, for homogeneity with the naming conventions.

Gtk.Selection.Selection_Data is now called Gtk.Selection_Data.Gtk_Selection_Data.

Handling of Target_Lists has been moved to the new package Gtk.Target_List, along with Target_Entry_Array.

The type Gtk_Target_Entry has been moved to the new package Gtk.Target_Entry.

The way of obtaining the selection data from callbacks using the Args/GValues approach has changed, from:

Data  : constant Gtk.Selection.Selection_Data :-
  Gtk.Selection.Selection_Data (Get_Proxy (Nth (Args, 2)));

to:

Data  : constant Gtk.Selection_Data.Gtk_Selection_Data :-
  From_Object (Get_Address (Nth (Args, 2)));

The type Target_Flags has been moved to Gtk.Enums.Gtk_Target_Flags.

The flag corresponding to Target_No_Constraint has been removed: use the value 0 instead.

14.5.65. Gtk.Scrolled_Window

Set_Policy's parameters were renamed to Hscrollbar_Policy and Vscrollbar_Policy instead of H_Scrollbar_Policy and V_Scrollbar_Policy.

14.5.66. Gtk.Socket / Gtk.Plug

The binding for these two packages was removed. They are not portable across platforms, and require access to the low-level X11 window ID, for which we do not provide a binding.

14.5.67. Gtk.Status_Icon

Status_Icon widget parameter names have been normalized to “Status_Icon".

Get_Blinking and Set_Blinking have been removed, it is no longer possible to make the status icon blink.

14.5.68. Gtk.Style

All functions based on Gdk.GC or Gdk.Pixmap have been removed. This package is deprecated (but not removed yet) in gtk3 Use functions in Gtk.Style_Context instead.

A number of drawing functions have been removed: use the Paint_* functions instead.

Replace a call to Get_Font with:

with Gtk.Style_Context;  use Gtk.Style_Context;
Get_Style_Context (Widget).Get_Font (Gtk_State_Flags_Normal);

14.5.69. Gtk.Text

This obsolescent API has been removed: use a Gtk.Text_View/Gtk.Text_Buffer instead.

14.5.70. Gtk.Text_Attributes

Set_Fg_Stipple, Get_Fg_Stipple, Set_Bg_Stipple, Get_Bg_Stipple have been removed without a replacement.

14.5.71. Gtk.Text_View

The functions Get/Set_Disable_Scroll_On_Focus have no effect in recent versions of gtk+ and have been removed.

14.5.72. Gtk.Tree_Dnd

This package was removed, and its contents split into Gtk.Tree_Drag_Source and Gtk.Tree_Drag_Source.

The `Drag_Dest_` and `Drag_Source_` prefixes were removed from the subprogram, so for instance Drag_Dest_Drag_Data_Received has become Drag_Data_Received.

14.5.73. Gtk.Tree_Model

A Gtk_Tree_Model is now an interface (implemented by Gtk_List_Store and Gtk_Tree_Store), no longer a tagged type. It means that in callbacks that receive a Gtk_Tree_Model parameter, you can no longer cast this parameter to a Gtk_Tree_Store for instance. Instead, you need to do the following:

--  Model is the parameter, of type Gtk_Tree_Model
Tree : constant Gtk_Tree_Store :- Gtk_Tree_Store (-Model);

Gtk_New, for a Gtk_Tree_Path, are now procedures instead of functions, to follow the usual GtkAda convention.

Gtk_Tree_Row_Reference has been moved to its own package Gtk.Tree_Row_Reference.

Gtk_New and Gtk_New_First (for a tree path) now take a “out” parameter, for consistency with the rest of the API.

14.5.74. Gtk.Tree_View_Column

Get_Cell_Renderers is obsolete, use the Gtk.Cell_Layout interface and Gtk.Cell_Layout.Get_Cells.

14.5.75. Gtk.Tips_Query

This obsolete package has been removed.

14.5.76. Gtk.Tool_Item

Set_Tooltip has been removed: use Set_Tooltip_Text and Set_Tooltip_Markup instead.

14.5.78. Gtk.Tooltips

The package Gtk.Tooltips has been removed, in favor of Gtk.Tooltip.

For creating simple tooltips on all GtkAda widgets, the easiest is to use Gtk.Widget.Set_Tooltip_Text or Gtk.Set_Tooltip_Markup. See the example in testgtk/create_tooltip.adb.

14.5.79. Gtk.Tree_View

Procedure Create_Row_Drag_Icon now returns a Cairo_Surface.

Get_Hadjustment, Set_Hadjustment, Get_Vadjustment, Set_Vadjustment have been removed: use the equivalent properties.

Widget_To_Tree_Coords and Tree_To_Widget_Coords have been removed: use Convert_Widget_To_Tree_Coords and Convert_Tree_To_Widget_Coords.

14.5.80. Gtk.VRuler

This widget has been removed without any replacement.

14.5.81. Gtk.Widget

The old Draw function no longer exists, and should be replaced with calls to Queue_Draw_Area. However, a new Draw function was added with a different profile and different semantic.

Function```Get_Snapshot`` has been removed. Draw should be used instead.

Hide_All has been removed: use Hide instead.

Set_Extension_Events and End_Extension_Events are no longer needed and have been removed.

Set_Colormap and Get_Colormap are no longer needed and have been removed.

Set_Scroll_Adjustments has been removed without a replacement.

Shape_Combine_Mask, Input_Shape_Combine_Mask and Reset_Shapes have been removed without replacements.

Set_Uposition has been removed: use the properties of the containing widget to fix the position of contained widgets. The functions in Gtk.Window, for instance Gtk.Window.Move, should be used for top-level widgets.

Set_USize has been removed: use Set_Size_Request instead.

Size_Request is now obsolescent. The recommend replacement is to use Get_Preferred_Width and Get_Preferred_Height.

Set_Default_Colormap, Get_Default_Colormap, Push_Colormap and Pop_Colormap were removed. They are no longer needed, since all drawing is done through Cairo which doesn’t use a colormap but directly the red/green/blue components.

Queue_Clear and Queue_Clear_Area have been removed, call Queue_Draw and Queue_Draw_Area instead.

The signal “expose_event” no longer exists. It has been replaced with the “draw” signal which provides a preconfigured Cairo_Context suitable for the drawing (including the clip area that is used to speed up the rendering).

Activate is now a function.

Child_Focus: removed default value for Direction parameter (was Dir_Tab_Forward)

Get_Allocation_Height and Get_Allocation_Width are now named Get_Allocated_Height and Get_Allocated_Width.

Get_Allocation_X and Get_Allocation_Y were removed, and can be accessed through Get_Allocation.X and Get_Allocation.Y instead.

A lot of flags (Can_Focus, Can_Default,...) now have explicit setters and getters. This removed a number of subprograms, like:

``Double_Buffered_Is_Set`` (see ``Get_Double_Buffered)``
``Can_Focus_Is_Set`` (see ``Get_Can_Focus)``
``Mapped_Is_Set`` (see ``Get_Mapped)``
``Realized_Is_Set`` (see ``Get_Realized)``
``Has_Default_Is_Set`` (see ``Has_Default)``
``Has_Focus_Is_Set`` (see ``Has_Focus)``
``Has_Grab_Is_Set`` (see ``Has_Grab)``
``Rc_Style_Is_Set`` (see ``Has_Rc_Style)``
``In_Destruction_Is_Set`` (see ``In_Destruction)``
``Drawable_Is_Set`` (see ``Is_Drawable)``
``No_Window_Is_Set`` (see ``Has_Window)``

Size_Allocate now takes an “in out” parameter for the allocation

Set_Flags was renamed Set_State_Flags Unset_Flags was renamed Unset_State_Flags Flags and Flag_Is_Set must be replaced with a call to Get_State_Flags

Get_Child_Requisition is now a procedure with an in out parameter. It is obsolescent.

Default_Motion_Notify_Event was removed.

Has_Default_Motion_Notify_Handler was removed.

Get_Default_Visual was removed.

Restore_Default_Style was removed (use Set_Style with a null parameter instead).

Class_Find_Style_Property, Class_List_Style_Properties and Class_Install_Style_Property were removed. They are mostly of interest when writting theme engines.

Class_Path and Path were replaced with Get_Path.

Allow_Shrink_Property and Allow_Grow_Property have been removed: use: Get_Hexpand and Get_Vexpand instead.

Render_Icon has been replaced by Render_Icon_Pixbuf.

14.5.82. Gtk.Window

Set_Has_Frame, Get_Has_Frame, Set_Frame_Dimensions, Get_Frame_Dimensions: these special-purpose subprograms have been removed without replacement.

Get_Gravity, Set_Gravity: these have been removed, use the property Gravity_Property instead.

Resize no longer accepts parameters set to -1 to indicate the preferred size of the window. This was a GtkAda extension, which can be achieved using Get_Preferred_Size and passing the result to Size.

Group_Add_Window was renamed to Add_Window. Group_Remove_Window was renamed to Remove_Window. Group_List_Windows was renames to List_Windows.

Initialize now has the same default value for its The_Type parameter as Gtk_New.

14.6. GtkAda

14.6.1. Gtkada.MDI

Set_Dnd_Message no longer has a special handling for “#”, which was: used to indicate whether the window would be preserved or hidden when changing perspectives. Instead, a different color is used to highlight the target area (and this highlighting is now done using transparency).

14.6.2. Gtkada.Properties

This package has been removed. It used to provide a dialog allowing you to view and edit the properties of widgets in your application, live. This is now provided directly by third parties through the GtkParasite tool. See http://code.google.com/p/gtkparasite/

14.7. Gnome

14.7.1. Gnome.App_Bar

Subprogram Appbar_Get_Progress has been removed without replacement.

14.7.2. Gnome.Gentry

This package has been removed without replacement.

14. Transitioning from GtkAda 2 to GtkAda 3

14.1. General

14.1.1. Interfaces

14.1.2. Ada 2012

14.2. Pango

14.2.1. Pango.Font

14.3. Glib

14.3.1. Glib.Object

14.3.2. Glib.G_Icon

14.4. Gdk

14.4.1. Gdk.Bitmap

14.4.2. Gdk.Color

14.4.3. Gdk.Cursor

14.4.4. Gdk.Dnd

14.4.5. Gdk.Drawable

14.4.6. Gdk.Event

14.4.7. Gdk.Font

14.4.8. Gdk.GC

14.4.9. Gdk.Image

14.4.10. Gdk.Main

14.4.11. Gdk.Pixbuf

14.4.12. Gdk.Pixmap

14.4.13. Gdk.Region

14.4.14. Gdk.RGB

14.4.15. Gdk.Window

14.4.16. Gdk.Window_Attr

14.5. Gtk

14.5.1. Gtk.Action

14.5.2. Gtk.Aspect_Frame

14.5.3. Gtk.Assistant

14.5.4. Gtk.Builder

14.5.5. Gtk.Button_Box

14.5.6. Gtk.Cell_Layout

14.5.7. Gtk.Cell_Renderer

14.5.8. Gtk.Cell_View

14.5.9. Gtk.Clist

14.5.10. Gtk.Container

14.5.11. Gtk.Color_Button

14.5.12. Gtk.Color_Selection

14.5.13. Gtk.Color_Selection_Dialog

14.5.14. Gtk.Combo

14.5.15. Gtk.Combo_Box

14.5.16. Gtk.Combo_Box_Entry

14.5.17. Gtk.Clipboard

14.5.18. Gtk.Ctree

14.5.19. Gtk.Curve

14.5.20. Gtk.Dialog

14.5.21. Gtk.Dnd

14.5.22. Gtk.Editable

14.5.23. Gtk.Entry_Completion

14.5.24. Gtk.Enums

14.5.25. Gtk.File_Chooser_Button

14.5.26. Gtk.File_Chooser_Dialog

14.5.27. Gtk.File_Chooser_Widget

14.5.28. Gtk.File_Selection

14.5.29. Gtk.Fixed

14.5.30. Gtk.Gamma_Curve

14.5.31. Gtk.GC

14.5.32. Gtk.GEntry

14.5.33. Gtk.GRange

14.5.34. Gtk.Handle_Box

14.5.35. Gtk.HRuler

14.5.36. Gtk.Icon_Factory

14.5.37. Gtk.Image

14.5.38. Gtk.Image_Menu_Item

14.5.39. Gtk.Input_Dialog

14.5.40. Gtk.Item

14.5.41. Gtk.Item_Factory

14.5.42. Gtk.Layout

14.5.43. Gtk.Link_Button

14.5.44. Gtk.List_Item

14.5.45. Gtk.Main

14.5.46. Gtk.Menu

14.5.47. Gtk.Menu_Item

14.5.48. Gtk.Menu_Tool_Button

14.5.49. Gtk.Notebook

14.5.50. Gtk.List

14.5.51. Gtk.Object

14.5.52. Gtk.Old_Editable

14.5.53. Gtk.Option_Menu