Turning my comment into a proper answer: this is usually done by two methods: Get the root object of your QML scene through a view if you use QQuickView or just the QQmlApplicationEngine directly. This next step can be omitted for root objects, but for “qml objects” in general, you will need to have the … Read more
In other words, you have a class emitting a signal carrying a QImage and want to update an item in QML with that image? There are various solutions, none of which involves “converting a QImage to a QUrl” (whatever that means, surely you don’t need to get a data URL carrying your image data…) Use … Read more
A built-in official solution exists as of Qt 5 thanks to the QtGraphicalEffects module and I’m quite surprised to find out that no one provided such a simple solution. If you are targeting Qt 6.x QtGraphicalEffects is unfortunately deprecated so jump to the second part of the answer which proposes a solution independent of QtGraphicalEffects. … Read more
For any C++ code to be called from QML, it must reside inside a QObject. What you need to do is create a QObject descended class with your function, register it to QML, instantiate it in your QML and call the function. Note also that you have to mark your function with Q_INVOKABLE. Code: #ifndef … Read more
If the property values can change, then QML needs a NOTIFY signal so it can know when they have changed and update property bindings. If they can’t change, add CONSTANT to your property declaration, for example: Q_PROPERTY(QString simplified READ simplified CONSTANT). In your case, there are set methods, which implies the properties can change, but … Read more
QML is primarily intended for mobile platforms. Due to its youth and its concern for varied platform interface conventions, it lacks standard controls like buttons and combo boxes (but see the Components project). If you’re on mobile, or your UI requires a highly customized visual style, QML might be worth considering. Be prepared for a … Read more
You can wrap the enum in a class which derives from QObject (and that you expose to QML): style.hpp : #ifndef STYLE_HPP #define STYLE_HPP #include <QtGlobal> #if QT_VERSION < QT_VERSION_CHECK(5,0,0) // Qt 4 #include <QDeclarativeEngine> #else // Qt 5 #include <QQmlEngine> #endif // Required derivation from QObject class StyleClass : public QObject { Q_OBJECT public: … Read more
You should use Connections in this case (maybe it’s the only way to connect). Put your object myObj to QML file by setContextProperty qmlVectorForm->rootContext()->setContextProperty(“YourObject”, myOb); Your signal is finishedGatheringDataForItem(QString signalString) In QML file, add Connectios likes below: Connections { target: YourObject onFinishedGatheringDataForItem: { qmlString = signalString } }
Generally, usage of implicitHeight/Width only makes sense within reusable components. It gives a hint, of the natural size of the Item without enforcing this size. Let’s take a Image as an example. The natural size of the image would map one pixel from the image file to one pixel on the screen. But it allows … Read more
QML is the name of the language (just like C++, which is another language…) QtQuick is a toolkit for QML, allowing to develop graphical interface in QML language (there are other toolkits for QML, some are graphical like Sailfish Silica or BlackBerry Cascade, and some are non-graphical like QBS which is a replacement for QMake/CMake/make…) … Read more