the custom type from C++ is not visible in QML, but project compiles and works as expected

Anton1978

another problem:
the custom type from C++ is not visible in QML and causes an error, although the project compiles and works as expected
Here's the whole project:

cmake_minimum_required(VERSION 3.16)
project(Test03 VERSION 0.1 LANGUAGES CXX)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
find_package(Qt6 6.5 REQUIRED COMPONENTS Quick QuickControls2)
qt_standard_project_setup(REQUIRES 6.5)

qt_add_executable(appTest03
    main.cpp
)

qt_add_qml_module(appTest03
    URI Test03
    VERSION 1.0
    QML_FILES
        Main.qml
        RESOURCES
        QML_FILES
        SOURCES filecalculator.h filecalculator.cpp
)

# Qt for iOS sets MACOSX_BUNDLE_GUI_IDENTIFIER automatically since Qt 6.1.
# If you are developing for iOS or macOS you should consider setting an
# explicit, fixed bundle identifier manually though.
set_target_properties(appTest03 PROPERTIES
#    MACOSX_BUNDLE_GUI_IDENTIFIER com.example.appTest03
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
    MACOSX_BUNDLE TRUE
    WIN32_EXECUTABLE TRUE
)

target_link_libraries(appTest03
    PRIVATE Qt6::Quick Qt6::QuickControls2
)

include(GNUInstallDirs)
install(TARGETS appTest03
    BUNDLE DESTINATION .
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)

c++ header

#ifndef FILECALCULATOR_H
#define FILECALCULATOR_H

#include <QObject>
#include <qqml.h>

class FileCalculator : public QObject
{
    Q_OBJECT
    Q_PROPERTY(int calc READ calc WRITE setCalc NOTIFY calcChanged FINAL)
    QML_ELEMENT

public:
    explicit FileCalculator();
    int calc() const;
    void setCalc(int newCalc);
    Q_INVOKABLE void setFile(QString file);
signals:
    void calcChanged();
private:
    int m_calc = 0;
    QString _fileName = "";
};
#endif // FILECALCULATOR_H

qml file

import QtQuick
import QtQuick.Layouts
import QtQuick.Controls 2.4
//import FileCalculator //error - it doesn’t compile, but if you remove the line then everything is fine

Window {
    id: windowID
    visible: true
    maximumHeight : 500
    maximumWidth : 500
    minimumHeight : 500
    minimumWidth : 500

    FileCalculator{ //error - but if you ignore it, it will compile and everything works as it should, why the error?
        id: fcID
    }

    Column{
        anchors.centerIn: parent
        spacing: 25
        Rectangle{
            id: monitorID
            color: "lightblue"
            width: 250
            height: 50
            radius: 10
            Text{
                anchors.centerIn: parent
                text: fcID.calc
            }
        }

        Rectangle{
            id: filedownloaderID
            color: "lightgreen"
            width: 250
            height: 50
            radius: 10
            Text{
                id: fdtID
                anchors.centerIn: parent
                text: "Drag the file here"
            }
            DropArea{
                id: dropAreaID
                anchors.fill: parent
                onDropped: function(drop) {
                    console.log(drop.urls[0]);
                    fcID.setFile(drop.urls[0]);
                    filedownloaderID.color = "lightgray";
                    fdtID.text = "File selected"
                    dropAreaID.enabled = false
                }
            }
        }
    }
}

why - FileCalculator{ //error - but if you ignore it, it will compile and everything works as it should, why the error?

Axel Spoerl

My bad. You have to import the URI, so it should actually be

import Test03

Axel Spoerl

The CMake file adds filecalculator.h and filecalculator.cpp to appTest03.
That's why they compile. The import statement has to be:

import appTest03

Anton1978

if - import appTest03 - it doesn't compile, error - QML module NOT found

Axel Spoerl

My bad. You have to import the URI, so it should actually be

import Test03