Getting the QQuickImageProvider Example run in PySide6

MaKaNu

I have tried to implemented the QQuickImageProvider in our Application. and got prompted with the error:

TypeError: 'PySide6.QtQml.QQmlEngine.addImageProvider' called with wrong argument types:
  PySide6.QtQml.QQmlEngine.addImageProvider(str, ObjectType)
Supported signatures:
  PySide6.QtQml.QQmlEngine.addImageProvider(str, PySide6.QtQml.QQmlImageProviderBase)

So I found following solved Post but it seems not to be the same issue I struggle with.

I translated the given cpp code from the example to following python code:

image_provider.py:

from PySide6.QtQml import QQmlImageProviderBase
from PySide6.QtQuick import QQuickImageProvider
from PySide6.QtCore import QSize
from PySide6.QtGui import QPixmap, QColor


class ColorImageProvider(QQuickImageProvider):
    def __init__(
        self,
        type: QQmlImageProviderBase.ImageType,
        flags: QQmlImageProviderBase.Flags = ...,
    ) -> None:
        super().__init__(type, flags)

    def requestPixmap(self, id: str, size: QSize, requestedSize: QSize) -> QPixmap:
        width, height = 100, 50

        if size:
            size = QSize(width, height)
        pixmap = QPixmap(
            requestedSize.width() if requestedSize.width() > 0 else width,
            requestedSize.height() if requestedSize.height() > 0 else height,
        )
        pixmap.fill(QColor(id).rgba())
        return pixmap

colors.qml:

Column {
    Image { source: "image://colors/yellow" }
    Image { source: "image://colors/red" }
}

main.py:

import sys
from pathlib import Path

from PySide6.QtQuick import QQuickView
from PySide6.QtGui import QGuiApplication

from image_provider import ColorImageProvider

# To be used on the @QmlElement decorator
# (QML_IMPORT_MINOR_VERSION is optional)
QML_IMPORT_NAME = "io.qt.textproperties"
QML_IMPORT_MAJOR_VERSION = 1

if __name__ == "__main__":
    app = QGuiApplication(sys.argv)
    view = QQuickView()
    engine = view.engine()
    engine.addImageProvider("colors", ColorImageProvider)
    qml_file = Path(__file__).parent / "colors.qml"
    view.setSource(qml_file)
    view.show()

    if not engine.rootObjects():
        sys.exit(-1)

    sys.exit(app.exec())

SGaist

Hi and welcome to devnet,

addImageProvider expects an instance of your custom provider not the class.

By the way, in both examples, the subclass have an empty constructor that just call the base class with QQuickImageProvider::Pixmap as parameter, I would implement something similar.

Momo007

Hey ! did you find a solution to this Issue ? because the qt pyside 6 example seems to be broken