gtk 3.98.0

[Matthias Clasen <install-module master gnome org>]

About gtk
=========

GTK is a multi-platform toolkit for creating graphical user
interfaces. Offering a complete set of widgets, GTK is suitable for
projects ranging from small one-off tools to complete application
suites.

GTK has been designed from the ground up to support a range of
languages, not only C/C++. Using GTK from languages such as Perl and
Python (especially in combination with the Glade GUI builder) provides
an effective method of rapid application development.

GTK is free software and part of the GNU Project. However, the
licensing terms for GTK, the GNU LGPL, allow it to be used by all
developers, including those developing proprietary software, without
any license fees or royalties.

News
====

  While this release gets significantly closer to what we aim for in GTK 4,
  there are still a few big items outstanding that we are currently working
  on:

  - Event controllers for keyboard shortcuts
  - Movable popovers
  - Row-recycling list and grid views
  - Revamped accessibility infrastructure
  - Animation API

  We will do further 3.98.x snapshots as these land.

  *****************

* The DND refactoring has been completed. The GTK API for DND has been turned
  into event controllers: GtkDragSource and GtkDropTarget. Support for file
  transfers via file transfer portal has been added for both DND and the clipboard.

* Child surfaces have been removed. GDK only supports toplevel and popup surfaces
  now. The client-side window implementation has been removed too. On the GTK side,
  the GtkNative interface has been introduced for widgets that have their own
  surface. This cleanup is not 100% complete yet.

* Global positions and related apis such as gdk_surface_move are no longer available.
  
* A constraint-based layout manager has been added.

* Many classes have been made explicitly non-subclassable, and the widget hierarchy
  has been simplified, by making widgets derive directly from GtkWidget instead of
  a container.

* Menu-related changes:
 - GtkMenu, GtkMenuBar and related classes have been removed. They are being replaced
   by GMenu and popover-based variants. Popover menus can now do traditional, nested
   menus, and model buttons show accelerators.
 - Context menus are no longer created with ::populate-popup signals, but use menu
   models and actions.
 - Widget actions can be created in class_init, with gtk_widget_class_install_action.
 - GtkToolbar has been removed as well.

* Text-related changed:
 - Text cursor blinking has been made smooth.
 - GtkTextView is caching rendernodes for the visible text range now, improving the
   scrolling performance of text.
 - Add a simple undo stack for text edits has been added.

* The native Win32 filechooser backend supports choices.

* GtkTreeView renders tree and grid lines with textures.

* GtkEmojiChooser has been made public.

* GtkGestureMultiPress has been renamed to GtkGestureClick.

* GtkWidget has api to handle style classes: gtk_widget_add_style_class.
  This is the first step towards moving away from GtkStyleContext.

* X11-specific changes:
 - XI2 is now mandatory
 - The xim input method has been removed

* Wayland-specific changes:
 - The loading of cursor themes has been improved to load cursors on demand,
   and no longer relies on libwayland-cursor.

* The GL renderer is now sharing icon and glyph caches for all surfaces,
  and has better support for blurring and shadow rendering.

* Performance-related changes:
 - GTK provides profiling information for Sysprof when launched with GTK_TRACE=1.
 - Css computation has been optimized
 - Css lookups are using a Bloom filter
 - Icon loading IO has been moved to a thread




Download
========
https://download.gnome.org/sources/gtk/3.98/gtk-3.98.0.tar.xz (12.1M)
  sha256sum: d5fbe6c29ebd47c791c3537376bb0cdf85ae559cc164cd1957b1b397b89dc2ae