Classes for canvas display using GTK4.

CAUTION! Highly experimental, constantly changing code

Provides alternative graphics implementation in the ROOT. Allows non-GL painting in GTK4. Implementes:

painting via TVirtualPadPainter interface
canvas menu
status bar
objects context menu
basics graphical editors

To use this class one need to compile ROOT with -Dgtk4canv=ON flag. GTK4 library should be installed on the system. To activate GTK4 canvas in ROOT application one should create .rootrc file with following entries:

Gui.Factory: gtk4

Root.PadEditor: gtk4

For compilation on windows one can use vcpkg to download all necessary gtk4 libraries. When calling cmake, one can provide following arguments:

 -DCMAKE_TOOLCHAIN_FILE="C:\git\vcpkg\scripts\buildsystems\vcpkg.cmake" -DVCPKG_TARGET_TRIPLET=x64-windows

Classes
class	Gtk4CanvasWindow

class	Gtk4DrawArea

class	Gtk4MethodDialog
	Specialized dialog to enter arguments for method exection. More...

class	TGtk4Canvas
	Basic TCanvasImp ABI implementation for Gtk4. More...

class	TGtk4ContextMenu
	This class provides an interface to context-sensitive popup menus. More...

class	TGtk4GedEditor
	TVirtualPadEditor ABI implementation for GTK4. More...

class	TGtk4GuiFactory
	This class is a factory for ROOT GUI components. More...

class	TGtk4PadPainter
	Implement TVirtualPadPainter for Gtk4 graphics. More...