Improved GOTK3 (go bindings for GTK+3)

Original GOTK3 project provides Go bindings for GTK+3 and dependent projects.

Idea to create a fork from one of the best GTK+3 adaptation for golang was not just add another API functions, but came from the other side - create good application example written in go, which demonstrate modern GTK+ features and in addition provide out-of-the-box code patterns to quickly compose GTK+3 application.

As a results a lot of refactoring was done with original code, to create on the top example application Cool App, which contains many ready to use code samples to build go-application with modern GTK+3 GUI.

Short list of changes made:

Code refactored and reformated for better mix of widgets in corresponding files.
Some amount of errors was fixed including memory leaks.
GOTK3 examples which in original version were located separately, have been integrated here in one project.
New GLIB, GTK+ objects and widgets supported, including GAction, GSimpleAction, GActionMap, GMenuModel, GMenu, GtkActionable, GFile and so on.
CoolApp example application created to demonstrate golang code patterns to build modern GTK+3 application, which include menus, toolbars, actions and others widgets and tools (including pattern for fullscreen wrap/unwrap, preference dialog sample, save/restore settings and so on).

Library successfully tested on both Linux and FreeBSD systems.

Usage

Find example applications in folder "examples".

Among all the examples pay attention to:

Most powerful example: feature-rich "Cool App" application with the newest GTK+3 widgets and helpful code patters. Find more information and application screenshots here.
Large full-featured GUI application: Gorsync Backup.

Documentation

Each package's internal go doc style documentation can be viewed online without installing this package by using the GoDoc site (links to cairo, glib, gdk, and gtk documentation).

Installation

GOTK3 currently requires GTK 3.6-3.24, GLib 2.40-2.70, and Cairo 1.10 or 1.12. A recent Go (1.6 or newer) is also required.

GOTK3 installation and build process support existing GLIB, GTK+3 API variations which might significantly depend on minor version. For instance, some noticeable changes in API was made starting from 3.12. So library support next tags based on golang build constraints approach:

List of supported GLIB tags: glib_2_40, glib_2_42, glib_2_44, glib_2_46, glib_2_48, glib_2_50, glib_2_52, glib_2_54, glib_2_56, glib_2_58, glib_2_60, glib_2_62, glib_2_64, glib_2_66, glib_2_68, glib_2_70.
List of supported GTK tags: gtk_3_6, gtk_3_8, gtk_3_10, gtk_3_12, gtk_3_14, gtk_3_16, gtk_3_18, gtk_3_20, gtk_3_22, gtk_3_24.

Thus, when you trying to get or build library you should specify GTK build tag which correspond to your current GTK+3 version installed on computer. So, it should be:

go {get|build|install} -tags "gtk_$(pkg-config --modversion gtk+-3.0 | tr . _| cut -d '_' -f 1-2)" github.com/d2r2/gotk3/...

, where one of get/build/install should be selected.

If you sure that you have the latest GTK+3 installation (GTK3.24 at the moment), you could run this commands omitting build tag, like this:

go {get|build|install} github.com/d2r2/gotk3/...

And finally the easiest approach is to run bash script:

./build_with_tags.sh

, where --GLIB, --GTK options might be specified to point exact version of GLIB and GTK. If you omit GLIB, GTK options, they will be selected automatically to default versions.

NOTE: Once you made any changes in the library, it's highly recommended to install it before further use, otherwise any derived application will compile for a long-long time, so run in advance:

go install -tags "gtk_$(pkg-config --modversion gtk+-3.0 | tr . _| cut -d '_' -f 1-2)" github.com/d2r2/gotk3/...

, either for Golang which support build cache feature (starting from 1.10), you can run existing build script with same results

./build_with_tags.sh

Additional projects/links used

Projects with GTK+3 UI that inspired to improve the library:

Tilix - tiling terminal emulator for Linux using GTK+ 3.
GNOME/gedit - standard GNOME editor.

Contact

Please use Github issue tracker for filing bugs or feature requests.

License

Modified GOTK3 is licensed under the liberal ISC License, as the original version.

License

d2r2/gotk3

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