![]() ![]() ![]() There are several GUI designers for GTK+. GtkInspector can only be invoked after installing the development package libgtk-3-dev/gtk+-devel. ![]() GtkInspector has been introduced with version 3.14. GSK was finally merged into GTK+ version 3.90 released March 2017. GSK lies between the graphical control elements (widgets) and the rendering. GSK is the rendering and scene graph API for GTK+. GDK acts as a wrapper around the low-level functions provided by the underlying windowing and graphics systems. On 2018-Jan-26 at Matthias Clasen gave an overview of the current state of GTK+ 4 development, including a high-level explanation of how rendering and input worked in GTK+ 3, what changes are being made in GTK+ 4 (>3.90), and why. Since GTK+ version 3.0, all the rendering is done using Cairo. Starting with version 2.8, released in 2005, GTK+ began the transition to using Cairo to render the majority of its graphical control elements. Several display engines exist which try to emulate the look of the native widgets on the platform in use. GTK+ can be configured to change the look of the widgets drawn this is done using different display engines. There is also an HTML5 back-end called Broadway. While GTK+ is primarily targeted at windowing systems based upon X11 and Wayland, it works on other platforms, including Microsoft Windows (interfaced with the Windows API), and macOS (interfaced with Quartz). GTK+ is an object-oriented widget toolkit written in the C programming language it uses GObject, that is the GLib object system, for the object orientation. The GTK+ library contains a set of graphical control elements (widgets), version 3.22.16 contains 186 active and 36 deprecated widgets. ![]() GDK contains back-ends to X11, Wayland, Broadway (HTTP), Quartz and GDI and relies on Cairo for the rendering. ![]()
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