Teo Mrnjavac authored 8 years ago and Philip Müller committed 8 years ago

CAL-390 #close

In order to avoid deep copies, Qt containers over which we iterate must be const
The remaining unported cases require qAsConst (Qt 5.7) or std::as_const (C++17)

This avoids the duplication between the bootloader and grub modules.

This also adds ImageRegistry, a SVG cache, a bunch of utility functions
for shared pixmaps in CalamaresUtilsGui and renames several qrc files
in viewmodules.

startup.

Redone CalamaresWindow without UI file.
Const correctness in ViewStep and plugins.

Renamed ViewPlugin to ViewStep.
Back/Next button status management.
Subpages are now under a ViewStep's jurisdiction, we only forward back/
next signals if a ViewStep says it's got more pages to show. ViewStep
exposes a QWidget* to ViewManager, this QWidget gets added to a stack.
If a ViewStep wishes to show more than one page, it must manage more
pages on its own inside its single QWidget*.

Moved module-related classes to src/calamares/modulesystem.
Fixes to startup code path.
Made ViewPlugins load into ViewManager.
Debug code: ViewManager currently only shows a plugin's prettyName.
Added ViewModule as a subclass of Module. Other kinds of plugins should
be supported in a similar way.

Added ViewManager.
Added dummy Settings class.
Added dummy plugin interface (UI plugins only).
Added dummy greeting plugin.
Added DLLEXPORT macros for UI plugin interface and plugins.