Register C++ types declaratively

Adapt to the new way of registering C++ types. The types need to be
seen at compile time so that code can be generated that invokes them.

This patch:

- Adds QML_* macros where applicable.
- Adapts the build system files to the new way of registering modules.
- Splits up the QtQuick.Controls[.*].impl files into their own plugins,
  as we can only register one QML module per .pro file.
- Removes C++ type registration calls in every plugin.
- Moves private types from src/quickcontrols2/quickcontrols2.pro
  to src/quickcontrols2/impl/quickcontrols2-impl.pro. Some of these
  types need to be exposed to QML, but quickcontrols2.pro is already in
  use to declare the QtQuick.Controls import (and also provides the
  public C++ QQuickStyle API), and the new QML_IMPORT_NAME/VERSION
  syntax only allows one module per project. As some of the types that
  need to be exposed to QML are also referenced by some C++ code (e.g.
  tests, etc.), we just move all of the private types to the new
  library.

Follow-up patches will register the QML types declaratively.

Task-number: QTBUG-82922
Change-Id: Iaf9ee106237d61701d57a8896f3822304c8151a6
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/src.pro b/src/src.pro
index 7f945ffb..b6d3b850 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -2,7 +2,9 @@ TEMPLATE = subdirs
 SUBDIRS += \
     quicktemplates2 \
     quickcontrols2 \
+    quickcontrols2impl \
     imports
 
 quickcontrols2.depends = quicktemplates2
-imports.depends = quickcontrols2 quicktemplates2
+quickcontrols2impl.depends = quicktemplates2
+imports.depends = quicktemplates2 quickcontrols2 quickcontrols2impl