QML and Qt Quick

https://doc.qt.io/qt-6/qtqml-syntax-signals.html#connecting-signals-to-methods-and-signals Signal objects have a connect() method to a connect a signal either to a method or another signal. When a signal is connected to a method, the method is automatically invoked whenever the signal is emitted. This mechanism enables a signal to be received by a method instead of a signal handler. Eg: Item { id: item onComponentCompleted: item.xChanged.connect(function(x) { console.log("x = " + x); }) }

@JKSH yep, that did it. Thanks.

@JoeCFD can you write it as a code please ?

Hi and welcome to devnet, From the top of my head, you would need to implement a custom image provider that creates a QImage from your raw files.

@TomZ As @JoeCFD suggested we also hi light the item which is selected. This continue to hilight when the item is moved.

Thanks for the explanations. We learn something new every day.

@Qt-embedded-developer you could do this using Javascript in QML if you really wanted to. You would need to write a recursive function to traverse the folders. You set the current folder by setting the folder property of the model. The number of items in the current folder is given by count. The items may be queried using get(index, property). See the documentation for the available properties. However, do you want to do this? Models are usually used to drive a visual component such as a tree view that is written in a declarative style so that you don't need to explicitly loop over all files. If you want to do something like that it might make more sense to do it in your C++ back end and use the appropriate Qt utility classes for querying the filesystem.

engine->rootContext()->setContextProperty( "myKeyEventFilter", &myKeyEventFilter ); in your qml file connect myKeyEventFilter to its signal and then call a func in SystemController.

@sampath02 Can you please provide more context to your question? To load a file into RAM you simply read it (using QFile for example). "and when pngs are updated what happens in RAM?" - updated by whom and where?

you can specify that an existing property should be required without redeclaring it : https://doc.qt.io/qt-6/qtqml-syntax-objectattributes.html#required-properties In your case: required selected

@Tauqueer no my parent is rectangle and child also rectangle

@SPlatten the same way, literally :D you can give each and every item has an objectName property https://doc.qt.io/qt-6/qml-qtqml-qtobject.html

@kkoehne , thank you.

@SPlatten you haven't created an instance of DataMngr. You are trying to call validateTag on the component type.