Introduce type based overload of Qt.createComponent

Add type based createComponent overloads based on
QQmlComponent::loadFromModule. They provide a way to instantiate a
component by its type, specified by  a URI and typename pair.
This enables creating Components for inline component types and C++ only
types.
Support for directly passing the type is deferred to a later commit, as
it needs some care to work together with the compiler.

As the string based overload matches a mistaken call to the URL based
createComponent with parent and mode swapped (due to anything being
convertible to string), we add a check to detect this specific error
case and give a helpful error message.

[ChangeLog][QtQml] Qt.createComponent now supports creating a Component
from its module and type name (passed as strings).

Task-number: QTBUG-97156
Fixes: QTBUG-26278
Change-Id: I89e7430fe02d52f57230bfa1b0bfbcbfd0ead4b7
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp b/tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp
index 2922b02643..f591a87dcb 100644
--- a/tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp
+++ b/tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp
@@ -1964,11 +1964,11 @@ void tst_qqmlecmascript::componentCreation_data()
         << "null";
     QTest::newRow("invalidSecondArg")
         << "invalidSecondArg"
-        << "" // We cannot catch this case as coercing a string to a number is valid in JavaScript
+        << ":40: TypeError: Invalid arguments; did you swap mode and parent"
         << "";
     QTest::newRow("invalidThirdArg")
         << "invalidThirdArg"
-        << ":45: TypeError: Passing incompatible arguments to C++ functions from JavaScript is not allowed."
+        << ":45: TypeError: Invalid arguments; did you swap mode and parent"
         << "";
     QTest::newRow("invalidMode")
         << "invalidMode"