Details
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Suggestion
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Resolution: Fixed
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Not Evaluated
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None
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6.7.1
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None
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1c7e8aa0f (dev), 2b1997414 (6.8), 124052699 (6.7)
Description
Link: https://doc.qt.io/qt-6/qtqml-qml-type-compiler.html#using-the-generated-c
In this documentation, we have this snippet.
Here, it creates QQuickWindow and the documentRoot.
However, when I tried qmltc with a simple app, where there's only one QML file(Main.qml) like so: (The project is attached btw. This is tested with Qt 6.7.1 msvc desktop)
import QtQuick Window { width: 640 height: 480 visible: true title: qsTr("Hello World") Rectangle { anchors.centerIn: parent width: 300 height: 300 color: "red" } }
The generated main.h has two classes:
class Main : public QQuickWindowQmlImpl
and
class Main_Rectangle : public QQuickRectangle
If I were to follow the snippet in the documentation, I was supposed to instantiate Main_Retangle and set its parent to QQuickWindow, but since Main_Rectangle's constructor was protected, I couldn't do it. Also, instantiating Main and calling setParentItem() of it didn't work either because it doesn't have setParentItem().
Hense, the snippet ended up like this, where I didn't create QQuickWindow separately and directly instantiate the Main class.
#include <QGuiApplication> #include <QQmlApplicationEngine> #include "main.h" int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); app.setApplicationDisplayName(QStringLiteral("This example is powered by qmltc!")); QQmlEngine e; QScopedPointer<QMLTCTest::Main> window(new QMLTCTest::Main(&e)); window->show(); app.exec(); }
and it worked:
Therefore, I think the snippet should be revised like this:
#include "myapp.h" // include generated C++ header QGuiApplication app(argc, argv); app.setApplicationDisplayName(QStringLiteral("This example is powered by qmltc!")); QQmlEngine e; QScopedPointer<QmltcExample::myApp> window(new QmltcExample::myApp(&e)); // ... window.show(); app.exec();
