Remove implicit import of QtQuick.VirtualKeyboard.Components

Background

During review of changes porting virtual keyboard to declarative types registration, there was a debate whether some semi-public components can be moved from QtQuick.VirtualKeyboard namespace to QtQuick.VirtualKeyboard.Components. Such components are used in the keyboard layouts, which are typically not customized by user applications. In some cases, however, it is possible that custom layouts are provided.

It was agreed that the Components are kept as implicit import of QtQuick.VirtualKeyboard until Qt7, where the components will be moved as dependencies. This would mean, that the Qt 6.x would remain backwards compatible, and in Qt7 the users would have to add an explicit

import QtQuick.VirtualKeyboard.Components

to custom layouts.

Special case for EnterKey

Porting to declarative type registration (as opposed to manual type registration) raised a previously hidden conflict in type resolution to surface. The EnterKey type conflicts between:

https://doc.qt.io/qt-6/qml-qtquick-enterkey.html

https://doc.qt.io/qt-6/qml-qtquick-virtualkeyboard-enterkey.html

In a typical keyboard layout, there are following imports:

import QtQuick
import QtQuick.VirtualKeyboard
import QtQuick.Layouts

Since the implicit import is given lower precedence, EnterKey type is resolved to QtQuick.

This issue was resolved by adding a wrapper QML component for EnterKey to QtQuick.VirtualKeyboard, which imports the EnterKey from QtQuick.VirtualKeyboard.Components, giving the component higher precedence.