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, 17 insertions, 0 deletions

diff --git a/src/imports/controlsimpl/controlsimpl.pro b/src/imports/controlsimpl/controlsimpl.pro
new file mode 100644
index 00000000..70f3e170
--- /dev/null
+++ b/src/imports/controlsimpl/controlsimpl.pro
@@ -0,0 +1,17 @@
+TARGET = qtquickcontrols2implplugin
+TARGETPATH = QtQuick/Controls.2/impl
+IMPORT_VERSION = 2.$$QT_MINOR_VERSION
+
+QT += qml quick
+QT_PRIVATE += core-private gui-private qml-private quick-private quicktemplates2-private quickcontrols2-private quickcontrols2impl-private
+
+DEFINES += QT_NO_CAST_TO_ASCII QT_NO_CAST_FROM_ASCII
+
+OTHER_FILES += \
+    qmldir
+
+SOURCES += \
+    $$PWD/qtquickcontrols2implplugin.cpp
+
+CONFIG += no_cxx_module
+load(qml_plugin)