QML Slider implementation guide bound value when using a custom property type in Qt 6.5
I'm performance testing and I've been researching this but I'm working with an scenario with a QML Slider not updating its bound property value correctly when the property is of a custom type... I created a custom type `Volume` that encapsulates an integer value and provides some additional functionality for clamping the values between a minimum and maximum range. However, when I try to bind the Slider's value to an instance of this `Volume` type, the slider does not reflect the changes properly. The value seems to be exploring at its initial state. Here's how I've defined my custom `Volume` type: ```cpp class Volume : public QObject { Q_OBJECT Q_PROPERTY(int value READ value WRITE setValue NOTIFY valueChanged) public: Volume(int min, int max, QObject *parent = nullptr) : QObject(parent), min(min), max(max), currentValue(min) {} int value() const { return currentValue; } void setValue(int newValue) { if (newValue < min || newValue > max) return; if (currentValue != newValue) { currentValue = newValue; emit valueChanged(); } } signals: void valueChanged(); private: int currentValue; int min; int max; }; ``` In my QML, I'm trying to use this custom type like this: ```qml import QtQuick 2.15 import MyApp 1.0 Rectangle { width: 200 height: 200 Volume { id: volumeControl; min: 0; max: 100; } Slider { id: volumeSlider from: volumeControl.min to: volumeControl.max onValueChanged: volumeControl.value = value value: volumeControl.value } } ``` I've tried debugging and noticed that the `valueChanged` signal is emitted when I manipulate the Slider, but the visual Slider itself does not move, nor does it update the bound value in the `Volume` object. I've also ensured that the `Volume` object is created before the Slider and that I have imported it correctly in QML. Is there something I might be missing in the binding? Should I be using a different approach to connect the Slider to this custom type? Any help would be appreciated! Any advice would be much appreciated. This is my first time working with Javascript 3.9.