QML and Qt Quick

This has been a question of mine for over a year. I resorted to having a factory class that has methods to instantiate various view models (and pass in dependencies) and return the pointer to that view model. This factory would be exposed to QML via singleton or contextProperty at the start of my program. Any QML view can decide which view models it wants and doesn't deal with dependency injection. Here is an example: class ViewModelFactory : public QObject { Q_OBJECT QML_ELEMENT QML_SINGLETON public: Q_INVOKABLE HomeViewModel* createHomeViewModel(QObject* parent = nullptr) { // Inject dependencies from ApplicationModels auto& appModels = ApplicationModels::instance(); return new HomeViewModel(appModels.smartHomeService(), appModels.userService(), parent); } }; Now, the above example makes ApplicationModels a singleton and passes it to the view model, but you could imagine a world where the factory can manage the dependencies without them being singletons. It took a lot of thinking and I gathered this approach by looking at how QtWidgets does things: a very hierarchical object structure where the MainWindow class would contain everything within it and proctor instantiation, DI, and more. QML just has access to what is publicly exposed by the ApplicationModel/factory, and no longer needs access to dependencies for ViewModels to use their desired view model. Note: I have not tested this yet (my fear being that I do NOT know the impact of calling factory methods on init of a Qml component)

The error you're encountering ("QML Image: SSL handshake failed") typically happens when there's a problem establishing a secure connection between the QML application and the server you're trying to connect to. This is often caused by issues with SSL certificates, the server's configuration, or network problems. To resolve this error, you can try the following steps: Check SSL/TLS Configuration: Ensure that the server you're connecting to has a valid SSL certificate. If you're using a self-signed certificate, it may not be trusted by the system. Make sure the certificate is correctly installed. Update QML/Qt and SSL Libraries: Sometimes, outdated libraries can cause compatibility issues. Make sure you're using the latest version of QML, Qt, and SSL libraries (OpenSSL). Verify Network and Proxy Settings: If you're behind a proxy or firewall, ensure the settings are properly configured and not blocking the SSL handshake. Trust Certificates: If the certificate isn't recognized by the system, you may need to manually add the certificate to the trust store. Enable Debugging: You can enable debugging in Qt to get more information about the SSL handshake failure. Set the following environment variable before running your application: ini Copy Edit QT_DEBUG_PLUGINS=1 For more detailed information and troubleshooting, you can refer to the following resources: Qt SSL documentation OpenSSL documentation Common SSL handshake errors Let me know if you need more help!

Ah, didn't read this. Thanks for the hint...

[image: e7e95ae0-e17e-44c2-b1d7-bfe4b1435410.jpg] The complete picture looks like this

Checkable and checked are not components of Button QML. A similar question here; https://forum.qt.io/topic/36479/solved-button-checkable-and-checked-not-working albeit a different answer/outcome from my response. Regardless, I still myself, cannot use checkable or checked with Button.

@SGaist Thank you so much!

It turns out wrapping the child Layout in an Item does the trick. Don't know why and whether this is the best solution import QtQuick import QtQuick.Controls import QtQuick.Layouts Window { height: 300 width: 240 visible: true StackLayout { anchors.fill: parent Item { Layout.fillWidth: true Layout.fillHeight: true ColumnLayout { anchors.fill: parent Rectangle { color: "red" Layout.preferredWidth: 100 Layout.preferredHeight: 50 Layout.alignment: Qt.AlignHCenter // Center within ColumnLayout } // other items } } // other items } }

@VITORdk said in Error: ":\Qt\6.7.3\android_arm64_v8a\include\QtCore\qnamespace.:24:1: error: error: Parse error at "__attribute__"": So I reduced my file to an empty file You can't compile an empty file. Also, I guess your project consists of more than just an empty file. Please provide more information, else nobody knows what you're doing and what the problem is. Did you try to create a new widget project in QtCreator and build it for Android?

Fixed in 6.8.2

I wonder if that forum post is referring to text components that support html to some extent, rather than to QML itself?

Though that page doesn't show any QML examples as far as I can see. I recall having to try a few things when I first wanted to do this a few years ago. I don't know if what I arrived at is the "correct" approach, but the format that I found to work in QML and have stuck to ever since involves using a triple forward slash like this: source: "qrc:///images/my-image.png"

@Praveen-Illa said in Facing an issue with Listview in Repeater: Hi Team, I am trying to control the visibility of the listview control on every button click for respective data model. But, I am getting below errors at "visible: buttonRepeater.model.expanded" Unable to assign [undefined] to bool Edited to emphasize the problem: Repeater { id: buttonRepeater model: groupModel delegate: Column { ListView { visible: buttonRepeater.model.expanded } } } buttonRepeater.model.expanded is attempting to access a property called expanded in buttonRepeater's model, not a role called expanded within a row of the model. Printing the values of buttonRepeater and buttonRepeater.model should make this clear.