For the registration to take effect, the qmltypes option is added to CONFIG in the project file and a QML_IMPORT_NAME and QML_IMPORT_MAJOR_VERSION are given:CONFIG + = qmltypes QML_IMPORT_NAME = Example QML_IMPORT_MAJOR_VERSION = 1. A list type contains a list of objects. To write a QML extension plugin: Subclass QQmlEngineExtensionPlugin and use the Q_PLUGIN_METADATA() macro to register the plugin with the Qt meta object system. as ID,NAME,CONTROL-TYPE,LINK at server side using LINQ to XML in C# language. QML is the language; its JavaScript runtime is the custom V4 engine, since Qt 5. Name. qml. If omitted, the object types and JavaScript resources provided by the module will be installed into the global namespace. A component provides a way of defining a new type that we can re-use in other QML files. 2. With the QML file in place, you can load it from Python: 1 # Instance of the Python object 2 bridge = Bridge() 3 4 # Expose the Python object to QML 5 context = engine. qml. qml import QtQuick 2. QML is a markup language (part of the QT framework) like HTML/CSS, with inline JavaScript that can interact with the C++ code of your (QT) application. In Qt, QML is mainly used to describe a visual scene graph, but it is not conceptually limited to this: the QML format is an abstract description of any object tree. In this case the modelData role contains the same data as the named role. QQmlContext 's are essential for passing data to QML components. That’s how class with this macro should. Qt offers various approaches to integrate QML and C++ code in an application. This signal must send string value as parameter (i. See also setSpan() and rowSpan(). Name. . Email. The PieChart class is registered using the QML_ELEMENT macro, to allow it to be used from QML. ** a written agreement between you and The Qt Company. qml (recally that only upper case files lead to exported QML types by default), and change main. Each element of the model represents a row, but these elements may have more than one Rectangle to draw, defined in a role with an array named blocs. If the QML module the type belongs to is imported with a lower version than the one determined this way, the QML type is invisible. Any snippet of QML code can become a component, just by placing it in the file "<Name>. Now, modify Circle. QQmlContext's are essential for passing data to QML components. /** * User just logged in * @param user The user which logged in */ signal loggedIn (User user) Extracting internal elements. Normally, the types exported by a module should be fixed. (Note that date/time values returned from C++ to QML can be formatted through Qt. My guess is this happens because I use as the Connections target: dynamicLoader. A component is a reusable element and QML provides different ways to create components. This is an overloaded function. attributes property string name property int size property variant attributes} Text { text: attributes. If you run the script from your command line, then you’ll get an output similar to the following: Shell. <TypeName> is the type being made available <InitialVersion> is the module version for which the type is to be made available <File> is the (relative) file name of the QML file that defines the type Zero or more object type declarations may. The toplevel CMakeLists. For example, you can use isEmpty() to test whether the queue is empty, and you can traverse a QQueue using QList's iterator classes (for example, QListIterator). The order of the elements in the returned list is the order they are encountered during the preorder traversal. This property was introduced in QtQuick. I'm new in a rather large QML codebase and I want to know the properties of the QML element I click on when running the application, e. The process of creating a new style begins by creating a new subdirectory for the style in a QML import path under the URL-based directory structure QtQuick/VirtualKeyboard/Styles The pro file looks like this: QT += quick CONFIG += c++11 CONFIG += qmltypes QML_IMPORT_NAME = com. an ARGB color value. If the QML module the type belongs to is imported with a lower version than the one determined this way, the QML type is invisible. A QML document defines a hierarchy of objects with a highly-readable, structured layout. QML describes the user interface as a tree of hierarchical elements. Name Classification Description; qmlgloverlay: Filter/QML/Overlay: qmlgloverlay element: qmlglsink: Sink/Video: qmlglsink element: qmlglsrc: Source/Video: qmlglsrc element: Subpages: qmlgloverlay – A filter that renders a QML scene onto a video streamI need margins between elements in QML ListView. As dtech said, you can't access objects in different files as they are no objects yet. 15 and it was a common problem how to achieve the same with CMake. g. Qt Declarative (Quick 2) about summary refs log tree commit diff statsThis can be your own C++ code or the specific implementations of surrounding elements. The. The QML_ELEMENT was originally introduced only for qmake in Qt 5. createComponent ("TestItem. To write a QML extension plugin: Subclass QQmlEngineExtensionPlugin and use the Q_PLUGIN_METADATA() macro to register the plugin with the Qt meta object system. 5. Enums in Qt QML. This function requires a function which provides an instance of the registered C++ class. Item { import MyLib 1. As the name suggests, they allow you to define a new component inside a file. For the registration to take effect, the qmltypes option is added to CONFIG in the project file and a QML_IMPORT_NAME and QML_IMPORT_MAJOR_VERSION are given: QML_IMPORT_NAME = People QML_IMPORT_MAJOR_VERSION = 1 These lines specify the import name and major version for all types exposed to QML. In QML, states are a set of property configurations defined in a State element. Description. XML namespaces are used for providing uniquely named elements and attributes in an XML document. However whenever I control click (Follow symbol) on an Item on the QML editor (in Qt. To allow the implementation of more advanced behavior, QML integrates tightly with imperative JavaScript code. A developer can swap a list view with a grid view with little changes to the data. Usually, C++ types are declared using the QML_ELEMENT and QML_NAMED_ELEMENT() macros and registered via the build system using QML_IMPORT_NAME and QML_IMPORT_MAJOR_VERSION. qml file. It provides the current time through hour and minute properties. This function was introduced in Qt 6. Where a role name would be ambiguous to use, it can be accessed via the model property (e. qrc:/qml/RootWindow. For example ListModel { id: myModel ListElement { text: "Apple" cost: 2. This property holds the name of the object. qml won't be able to create a PieChart. Invoke demonstrates how to use the <invoke> element with generated nested state-machines, where the SCXML file is compiled to a C++ class. QML - How to get children in an item? 1. Loader is a focus scope. qmake Setup. e. qml FramedImage. Use the QML_ELEMENT and QML_NAMED_ELEMENT() macros to declare QML types. qt_add_qml_module(myapp URI hello VERSION 1. qt. 0 of this plugin library, as a QML type called Time. 6. #. 通过这种方法，QML中可以直接访问注册到上下文中的C++类实例，并且是注册到QML的全局（具体是注册到一个 QQuickView或者engine）。以自定义一个Name类，类包括一个data属性为例。需要暴露给QML访问的类需要有特殊的定义： 可以通过右键项目->新建文件->C++Class来添加新类，继承自QObjectUse the name RegisterEnumsFromRelatedTypes with the value false to prevent enums from related types from being registered in this type. In QML, animations are created by applying animation objects to object property values to gradually change them over time. Dial. [singleton] Optional. The basic syntax is. asked Feb 8, 2016 at 22:10. Joins all the string list's strings into a single string with each element separated by the given separator (which can be an empty string). Controls 2. The import name and version given this way form a module that can be imported to access the types. The most important thing to notice is that our ExampleTriangleGeometry class inherits from QQuick3DGeometry and that we call the QML_NAMED_ELEMENT(ExampleTriangleGeometry) macro, making our class accessible in QML. Scope controls which variables an expression can access, and which variable takes precedence when two or more names conflict. Notice that the host and guests properties in BirthdayParty still take instances of Person . QML_SINGLETON combined with QML_ELEMENT or QML_NAMED_ELEMENT registers a singleton type that can be imported from QML, as discussed below. These QML files automatically become available as new QML element types to other QML components and applications in the same directory. This allows you to choose the prefix for QObjects, as the hard-coded qobject:: prefix is now simply the name of the #[cxx_qt::bridge] module. My main problem is: When onClickButton() in main. Qt OpenGL. Marks a QML file as providing a singleton type. The picture below is a screenshot of this program. int QTableView:: columnViewportPosition (int column) const. Elements can be grouped into visual and non-visual elements. Running the Example. It declares a QML type called Time via QML_NAMED_ELEMENT(). ** Licensees holding valid commercial Qt licenses may use this file in. The views used to access data models are described in the Presenting Data with Views overview. The property name is given in the attribute name and the element text is the tooltip. Right click on your qml. import QtQuick 1. With Qt 6. This command defines a QML module that can consist of C++ sources, . Use the QML_ELEMENT and QML_NAMED_ELEMENT() macros to declare QML types. h class Singleton : public QObject { Q_OBJECT Q_PROPERTY(int thing READ thing WRITE setThing NOTIFY thingChanged FINAL). If the data set is static, simple, and/or small, a model written in QML can be. Conversely, required properties can be set in a number of ways from QML or via native means. This QML file looks like this: This QML file looks like this: import QtQuick 2. I have this Listview with an QML Loader as delegate and I would like to access the objectName of the loader. Each QML component is instantiated in a QQmlContext. The parent element can be accessed using the parent keyword; With the import statement you import a QML. qml RESOURCES img/world. There are also a few properties defined through the Q_PROPERTY macro. . Business, Economics, and Finance. 2 (Qt 5. import org. int QTableView:: columnWidth (int column) const. To run the application on your own, press the Run tool on the left side, or select Build > Run from the menu. Dock windows can be moved inside their current area, moved into new areas and floated (e. setContextProperty("con", bridge) 7 8 # Get the path of the current directory, and then add the name 9 # of the QML file, to load it. Buttons" would lead to a module to be imported as "import Ui. Note that all C++ types registered with the QML type system must be QObject-derived, even if they are non-instantiable. The Qt Quick module is the standard library for writing QML applications. This decorator registers a class it is attached to for use in QML under a name different from the class name, using global variables to specify the import name and version. Here, multiple data has been filled with a for loop in two columns of the QML's table, namely what and session_name by putting them in a QVariantMap and then inserting that QVariantMap in QVariantList. Layouts Rectangle { id: root property int num_dots width: 150 height: 150. Using QML_ELEMENT with CMake Posted by dmitriano | QML, QT | There is an example of using QML_ELEMENT in qt5qtdeclarativeexamplesquickscenegraphopenglunderqml. 82 ns (3. A file-based component is created by placing a. [singleton] Optional. The content of my backend. 13. Create an empty folder alongside the main. Item - Basic item element inherited by QML elementsThese extensions allow custom QML types to be made available to the QML engine. import QtQuick 2. 0 import the main Qt QML module import "folderName" import the contents of the folder import "script. qml files, or both. name" QML_IMPORT_MAJOR_VERSION = 1 QML_IMPORT_MINOR_VERSION = 0 #. The QML syntax declaratively describes how to construct an in-memory object tree. Window QML module. AlignRight } (For backwards compatibility, the enumeration value may also be specified as a string, e. Note that all C++ types registered with the QML type system must be QObject-derived, even if they are non-instantiable. This functionality was added in Qt 5. We define the properties we are going to use, and add QML_NAMED_ELEMENT to make it available from QML: class GradientTexture : public QQuick3DTextureData { Q_OBJECT Q_PROPERTY(int height READ height WRITE setHeight NOTIFY heightChanged) Q_PROPERTY (int width. Toggle the play/pause state of the hovered audio or video element. The. These extensions allow custom QML types to be made available to the QML engine. The menu code is in FileMenu. to register a custom enum in QML (which utilizes the new QEnum annotation): class Theme(QObject): @QEnum. 1. With this code I get margin of column of elements, but I need margin between each element: ListModel { id: listModel ListElement { name: "Apple" } ListElement { name: "Banana" } } Component { id: listDelegate Rectangle { width: 250; height: 100 anchors. The import name and version given this way form a module that can be imported to access the types. qml. Finally, the most important change, is the "QML_ELEMENT" macro added to the person. Its use within Qt Creator is described at Using Qt Designer. import QtQuick 1. 1 of the QtQuick. util. Unlike QQuickView, QQmlApplicationEngine does not automatically create a root window. Thankfully, the solution to use QML_ELEMENT with CMake was introduced in Qt 6. 25 } ListElement { text: "Banana" cost: 1. So you cannot create Component as is. Broken QML text editor in Qt Creator when used with qt_add_qml_module. Sep 2018 - Present4 years 10 months. See also pressed and popup. How to use QML_ELEMENT with cmake As of Qt 6. Registering Singleton Objects with a Singleton TypeTo do this, add the QML_ELEMENT or QML_NAMED_ELEMENT macros and the QML_SINGLETON macro to a class containing the properties you want to expose as Q_PROPERTY declarations: // Singleton. It provides the current time through hour and minute properties. qml タイプを宣言するには、 qml_element および qml_named_element マクロを使用します。 プラグイン用のプロジェクト ファイルを作成します。追加： config += qmltypes は、ビルド システムに qml タイプを生成するように指示します。Cluster. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. Detailed Description. If you don’t register the class, app. If you don’t register the class, app. QML provides several types of data models among the built-in set of QML elements. Business, Economics, and Finance. qml" where <Name> is the new element name, and begins with an uppercase letter. Gaël Porté. A value type is one that is passed by value rather than by reference, such as an int or a string. Importing and Using the QtQuick ModuleThe QtObject type is a non-visual element which contains only the objectName property. To use the types, add the following import statement to your . qml won't be able to create a PieChart. , color, Color, COLOR, and cOloR refer to the same property). Start, stop, or pause animations. Add a comment. If the QML module the type belongs to is imported with a lower version than the one determined this way, the QML type is invisible. I am using latest Qt 5. In QML, properties serve many purposes but their main function is to bind to values. This sounds like an XY-problem. This is. This means that everything that you can do with Qt and C++, you can also do with Qt and Python. Use the name RegisterEnumsFromRelatedTypes with the value false to prevent enums from related types from being registered in this type. It declares a QML type called Time via QML_NAMED_ELEMENT(). QML Resource File. QML_ADDED_IN_MINOR_VERSION() only takes effect if the type or namespace is available in QML, by having a QML_ELEMENT, QML_NAMED_ELEMENT(), QML_ANONYMOUS, or QML_INTERFACE macro. qml are copy pasted from the example, so I won't repost them. Advanced Topics Prefixes. If the QML module the type belongs to is imported with a lower version than the one determined this way, the QML type is invisible. 1. , MyPushButton) should use red as their foreground color. This guide will cover three integration methods, qmlRegisterSingletonType<>, rootContext. toString) } onJobDone: { item_qml_id. {"payload":{"allShortcutsEnabled":false,"fileTree":{"examples/quick3d/customgeometry/doc/src":{"items":[{"name":"qtquick3d-examples-customgeometry. The meta object compiler (moc) will find the information given this way. js files. The QML_ELEMENT was originally introduced only for qmake in Qt 5. Changes to Qt Quick QML Types. We define a morph target that corresponds to the one we created in the custom geometry, and do an. qml. If you don't register the class, app. The file that the QFileInfo works on is set in the constructor or later with setFile(). If you just need a load of the same QML items, then simply create them and put them in a Row, Column, Grid or Flow. The types and their QML name are registered with the QML engine with QML_ELEMENT. I want to get the all attribute names of SECTION Element. This chapter adds a color picker to change the color of the text. Currently, we will look only at the simplest form - a file-based component. A list can store QML objects or value type values. The object’s attributes are then declared in the body. File: otherfile. Only use the id property if you intend to reference it somewhere. Configure your build file. cost instead of cost). I need these to identify QML objects within a mixed Qt/QML application for cucumber-cpp step. qml won’t be able to create a PieChart. ompiler: MSVC2019 64Bit. A file-based component is created by placing a QML element in a file and giving the file an element name (e. Registering Singleton Objects with a Singleton Type Detailed Description. Use the QML_ELEMENT and QML_NAMED_ELEMENT() macros to declare QML types. In this case it is better that the root is the Rectangle and that the Repeater is inside a Row (or Column or another similar component): Dice. Currently, we will look only at the simplest form - a file-based component. If the OpenGL scene graph backend is in use, the file search the. The syntax for defining a new signal is: signal <name>[([<type> <parameter name>[,. 8 on Windows. 2. Properties of type list are empty by default. The objectName is a QString property of QObject which defaults to an empty QString. A file-based component is created by placing a QML element in a file and give the file an element name (e. 0. 3 Rectangle { id: root width:800 height:600 ListView { id: listView x: 476 y: 64 width: 110 height: 160 model: myModel ListModel { id. Using default properties, the hierarchy of QtQuick elements. With QML modules, we know that a given QML element can be identified via the name of its module and its type-name. qml RESOURCES img/world. To write a QML extension plugin: Subclass QQmlEngineExtensionPlugin and use the Q_PLUGIN_METADATA() macro to register the plugin with the Qt meta object system. The only difference is that it does not have an id. pro file: QT += qml. For example, the Item class contains a list property named children that. Button. It's composed of the module URI with Plugin appended to it. These extensions allow custom QML types to be made available to the QML engine. This is a beautiful FluentUI component library based on Qt QML. The parent element can be accessed using the parent keyword; With the import statement you import a QML. Returns the column span of the table element at (row, column). QML_ADDED_IN_MINOR_VERSION() only takes effect if the type or namespace is available in QML, by having a QML_ELEMENT, QML_NAMED_ELEMENT(), QML_ANONYMOUS, or QML_INTERFACE macro. (Added in Qt 5. QML_SINGLETON combined with QML_ELEMENT or QML_NAMED_ELEMENT registers a singleton type that can be imported from QML, as discussed below. The QML language only knows of elements, properties, signals and bindings. 0". Register C++ types annotated with QML_ELEMENT. If you don't register the class, app. It provides the current time through hour and minute properties. Declares a QML object type to be made available by the module. Today I do this by specifying top-level properties: property string fontfamily: "Arial" property bool fontbold: false property bool fontitalic: false property int fontpixelsize: 11 property string fontcolor: "White". The syntax for properties is: [default] property <type> <name>[: defaultValue] Elements already possess useful properties but, to create custom properties, precede the property name with the keyword property. Such an approach also makes changing the QML UI difficult without affecting its C++ counterpart. QML provides several types of data models among the built-in set of QML elements. So, changing the QML_IMPORT_NAME to something unique (and including that new name in the QML file) solves this problem. Automatic Detection of File Extension. QDockWidget provides the concept of dock widgets, also know as tool palettes or utility windows. Refer to the documentation for the. QML is a declarative language that lets you design UIs faster than a traditional language, such as C++. The default is 1. Buttons 1. Suppose there is a new TimeModel C++ class that should be made available as a new QML type. I have defined a QML object under MyQMLObject. Currently the main branch supports Qt 6. The following code examples are a small part of the map component in the Map Viewer (QML) example. TimeExample QML extension plugin. The documentation shows the following example of a provider function: QML_SINGLETON combined with QML_ELEMENT or QML_NAMED_ELEMENT registers a singleton type that can be imported from QML, as discussed below. Unless explicitly set, this property is true when either pressed or popup. In another way you can define your Component in 2 ways: in a. Running the Example. Dock windows are secondary windows placed in the dock widget area around the central widget in a QMainWindow. Qt Quick has the notion of models, views, and delegates to display data. 12. If you want to. 12. If you want check if value is present (i. The PieChart class is registered using the QML_ELEMENT macro, to allow it to be used from QML. 12. then you choose either Item or one of its descendats as your root element. Declares a QML object type to be made available by the module. Well, show them. I just have an issue with configuring include directories by target_include_directories, which works well as usual. A ListView has a model, which defines the data to be displayed, and a delegate, which defines how the data should be displayed. E. CMake: One of the strengths of QML and C++ integration is the ability to implement UIs in QML separate from the C++ logic and dataset backend, and this fails if the C++ side starts manipulating QML directly. qml" where is the new component name, beginning with an uppercase letter. In this chapter, we make this example a little bit more dynamic by introducing states and transitions. struct MyStateMachineRegistration { Q_GADGET QML_NAMED_ELEMENT(MyStateMachine) QML_FOREIGN(MyStateMachine) QML_ADDED_IN_VERSION(1, 0) }; Then you can instantiate it in QML, like this: import MyStateMachine 1. library. The QML_FILES, HEADERS, and SOURCES arguments list the files that are part of the module. add_new_obj (myItem. Note that all C++ types registered with the QML type system must be QObject-derived, even if they are non-instantiable. QML FluentUI. When integrating with C++, note that any QQmlListProperty value passed into QML from C++ is automatically converted into a list. Bacon2D - Bacon2D is a framework to ease 2D game development, providing ready-to-use QML elements representing basic game entities needed by most. QtQuick is a framework built on QML. This function was introduced in Qt 4. QML elements with an id are exported as private member variables. 2. Usually, C++ types are declared using the QML_ELEMENT and QML_NAMED_ELEMENT() macros and registered via the build system using QML_IMPORT_NAME and QML_IMPORT_MAJOR_VERSION. Hi, I'm trying to expose my cpp-based class as a qml item with qml cmake api. These extensions allow custom QML types to be made available to the QML engine. Currently, we will focus on the fundamental visual. Focus and Key Events. qml, import the package that contains the C++ element, make a StatedGuiElement {} inside, add your states in QML to it, then you can use StatedGuiElement in your project. QML fill width of parent element. Extending QML Functionalities using C++. Uses QDate::longDayName(). Another great new feature in this release: Connecting to Signals via Rust is now possible!. qrc file can set a prefix to be added to each local file name, given in a <file> element, to get the name by which the file shall be known within the resource system. In addition, animation objects can be applied in different ways. the. 15 and it actually made registering C++ classes more straightforward. Integrating JavaScript. Following the documentation here, I added the following to my . 6) WebEngineView. It defines and implements the language and engine infrastructure, and provides an API to enable application developers to extend the QML language with custom types and integrate QML code with JavaScript and C++. QML_ADDED_IN_MINOR_VERSION() only takes effect if the type or namespace is available in QML, by having a QML_ELEMENT, QML_NAMED_ELEMENT(), QML_ANONYMOUS, or QML_INTERFACE macro. For example: Item { property var idMap: ( { foo:foo, bar:bar }) Rectangle { id:foo } Item { id:bar } function findItemById (id) { return idMap [id]; } Component. Viewed 398 times 1 I am trying to write simple application for sailfish OS, but I got in trouble with interaction with cover. The file is written in XML with the RCC element as root and qresource as the element for resources of all groups. h file: class Person : public QObject { Q_OBJECT Q_PROPERTY(QString name READ name WRITE setName) These extensions allow custom QML types to be made available to the QML engine. I want to expose a list of QStringlist from C++ to Qml and access its elements and their methods from the QML side. 7. If cell widget A is replaced with cell widget B, cell widget A will be deleted. First, we will create a menu containing buttons which will eventually perform different actions. For example, if ApplicationData has a signal named dataChanged(), this signal can be. It has named ranges and adjustable range widths. If the QML module the type belongs to is imported with a lower version than the one determined this way, the QML type is invisible. Components 1. See also QML_IMPLEMENTS_INTERFACES(), QML_ELEMENT, QML_NAMED_ELEMENT(), QML_UNCREATABLE(), and QML_ANONYMOUS. [since 6. A GridView has a model, which defines the data to be displayed, and a delegate, which defines how the data should be displayed. In the snippet we see that the [QML] { GeocodeModel } contains the plugin and two signal handlers. onCompleted: console. If the QML module the type belongs to is imported with a lower version than the one determined this way, the QML type is invisible. I want to create a simple list of GUI elements arranged in a list using PyQt + QML approach. class BirthdayParty : public QObject { Q_OBJECT Q_PROPERTY(Person * host READ host WRITE setHost NOTIFY hostChanged FINAL) Q_PROPERTY( QQmlListProperty <. In this case, a window of 640 x 480 pixels, with a window title “Hello World”. Detailed Description. For example, here is a component that is used by. qml won’t be able to create a PieChart. This ranges from headless services to widget based user interfaces. backend QML_IMPORT_MAJOR_VERSION = 1 The BackEnd class is automatically registered as a type, which is accessible from QML by importing the URL,. Its focus property must be set to true for any of its children to get the active focus. qml file that provides a singleton type needs to have its QT_QML_SINGLETON_TYPE source property set to TRUE to ensure that the singleton command is written into the qmldir file. In QML, property bindings result in a dependency between the properties of different objects. Crypto10. The QtQml and QtQuick modules provides the necessary infrastructure for QML-based UIs. 1. For more details, please visit Use zsh as the default shell on your Mac - Apple Support. This function is called by QML when instantiating this class. qml file: import QtQml 2. component <component name> : BaseType { // declare properties and bindings here } Inside the file, you can then refer to the new component by its name, just like if it. Hi, I just installed Qt 5. Suppose there is a new TimeModel C++ class that should be made available as a new QML type. The alignment is specified by alignment. Detailed Description. For more information on accessing QML objects. It is also possible to access objects via ids as long as you are in component scope that is nested inside the component that has the id, as long as it is not shadowed by anything with the same name. Q_OBJECT QML_NAMED_ELEMENT(SkinGeometry) Q_PROPERTY(QList < QVector3D > positions READ positions WRITE setPositions NOTIFY positionsChanged) Q_PROPERTY. qml. More information about exposing a singleton class to QML can be. I can see the list being created and displayed as expected in QML, however when I want to access the data from python, the list is empty. width = width_qml // here item_qml_id = Item_QMLTYPE_111 (0x1ee54f12312), can i find object using this. CONFIG += qmltypes QML_IMPORT_NAME = Counter QML_IMPORT_MAJOR_VERSION = 1 Even if it is not your only problem, the import. QML_IMPORT_NAME = "com. The former loads the item from a given URL, while the latter instantiates a Component. A bar category axis is implemented using the QBarCategoryAxis class or the BarCategoryAxis QML type.