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General Information
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===================

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This is GTK+ version @GTK_VERSION@. 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 projects to
complete application suites.
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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
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developers, including those developing proprietary software, without any
license fees or royalties.
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The official download locations are:
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  ftp://ftp.gtk.org/pub/gtk
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  http://download.gnome.org/sources/gtk+
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The official web site is:
  http://www.gtk.org/

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Information about mailing lists can be found at
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  http://www.gtk.org/mailing-lists.php
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Installation
============

See the file 'INSTALL'
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How to report bugs
==================

Bugs should be reported to the GNOME bug tracking system.
(http://bugzilla.gnome.org, product glib.) You will need
to create an account for yourself.

In the bug report please include:

* Information about your system. For instance:

   - What operating system and version
   - For Linux, what version of the C library

  And anything else you think is relevant.

* How to reproduce the bug.

  If you can reproduce it with one of the test programs that are built
  in the tests/ subdirectory, that will be most convenient.  Otherwise,
  please include a short test program that exhibits the behavior.
  As a last resort, you can also provide a pointer to a larger piece
  of software that can be downloaded.

* If the bug was a crash, the exact text that was printed out
  when the crash occured.

* Further information such as stack traces may be useful, but
  is not necessary.


Patches
=======

Patches should also be submitted to bugzilla.gnome.org. If the
patch fixes an existing bug, add the patch as an attachment
to that bug report.

Otherwise, enter a new bug report that describes the patch,
and attach the patch to that bug report.

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Patches should be in unified diff form. (The -up option to GNU diff)
Even better are git-formatted patches. (Use git format-patch)


Release notes for 3.10
======================

* GDK has been changed to allow only a single screen per display.
  Only the X11 backend had multiple screens before, and multi-screen
  setups (not multi-monitor!) are very rare nowadays. If you really
  need multiple X screens, open them as separate displays.
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* The behavior of GtkBox::expand has been changed to never propagate
  up. Previously, this was happening inconsistently. If you want the
  expand to propagate, use the GtkWidget h/v expand properties.
  If you experience sizing problems with widgets in ported code,
  carefully check the expand and fill flags of your boxes.

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* GtkBin no longer provides default implementations for
  get_height_for_width, subclasses now have to provide their own
  implementation if they need height-for-width functionality.

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Release notes for 3.8
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=====================

* GtkIconInfo has changed from being a boxed type to a GObject. This
  is technically an ABI change, but basically all existing code
  will keep working if its used as a boxed type, and its not
  possible to instantiate GtkIconInfos outside Gtk, so this is not
  expected to be a big problem.
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Release notes for 3.6
=====================

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* The accessibility bridge code that exports accessible objects
  on the bus is now used by default; atk-bridge has been converted
  into a library that GTK+ links against. To void the linking,
  pass --without-atk-bridge when configuring GTK+.

* GDK threading support has been deprecated. It is recommended to
  use g_idle_add(), g_main_context_invoke() and similar funtions
  to make all GTK+ calls from the main thread.

* GTK+ now follows the XDG Base Directory specification for
  user configuration and data files. In detail,
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  * $XDG_CONFIG_HOME/gtk-3.0/custom-papers is the new location
    for $HOME/.gtk-custom-papers
  * $XDG_CONFIG_HOME/gtk-3.0/bookmarks is the new location
    for $HOME/.gtk-bookmarks
  * $XDG_DATA_HOME/themes is preferred over $HOME/.themes
  * $XDG_DATA_HOME/icons is preferred over $HOME/.icons.
  Existing files from the old location will still be read
  if the new location does not exist.

* $HOME/.gtk-3.0 is no longer in the default module load path.
  If you want to load modules from there, add it to the GTK_PATH
  environment variable.

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Release notes for 3.4
=====================

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* Scroll events have been separated from button events, and smooth
  scrolling has been added with a separate event mask. Widgets now
  need to have either GDK_SCROLL_MASK or GDK_SMOOTH_SCROLL_MASK in
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  their event mask to receive scroll events. In addition, the
  GdkScrollDirection enumeration has gained a new member,
  GDK_SCROLL_SMOOTH, so switch statements will have to be amended
  to cover this case.
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* GTK+ now uses <Primary> instead of <Control> in keyboard accelerators,
  for improved cross-platform handling. This should not affect
  applications, unless they parse or create these accelerator
  manually.

* The tacit assumption that the Alt key corresponds to the MOD1
  modifier under X11 is now a hard requirement.

* The beagle search backend for the file chooser has been dropped.
  Tracker is the only supported search backend on Linux now.

* GtkNotebook has been changed to destroy its action widgets when
  it gets destroyed itself. If your application is using action
  widgets in notebooks, you may have to adjust your code to take
  this into account.

* GtkApplication no longer uses the gtk mainloop wrappers, so
  it is no longer possible to use gtk_main_quit() to stop it.

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* The -uninstalled variants of the pkg-config files have been dropped.

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* Excessive dependencies have been culled from Requires: lines
  in .pc files. Dependent modules may have to declare dependencies
  that there were getting 'for free' in the past.


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Release notes for 3.2
=====================

* The accessible implementations for GTK+ widgets have been integrated
  into libgtk itself, and the gail module does not exist anymore. This
  change should not affect applications very much.

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Release notes for 3.0
=====================

* GTK+ 3 is a major new version of GTK+, which is parallel installable
  with GTK+ 2.x. For information about porting applications from GTK+ 2.x
  to GTK+ 3, see the file:

  docs/reference/gtk/html/migrating.html

  Or online at:

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  http://library.gnome.org/devel/gtk/3.0/migrating.html
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* Note that the library sonames in this release have been changed from
  libgtk-3.0 and libgdk-3.0 to libgtk-3 and libgdk-3, to prevent the
  library versions from going backwards, compared to the 2.90/91/99
  releases. Applications will have to be recompiled.