Simple QQuickWidget example doesn't fill rect?

patrickkidd

The following example doesn't show the Rectangle. Maybe because the root object is not properly resized with the parent despite QQuickWidget.SizeRootObjectToView being set? Same results (none) QQuickWidget is the parent or if the QWidget subclass is the parent.

I imagine I'm missing something simple here...

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtQml import *
from PyQt5.QtQuick import *
from PyQt5.QtQuickWidgets import *

class Parent(QWidget):

    def __init__(self):
        super().__init__()

        self.qml = QQuickWidget()
        self.qml.setResizeMode(QQuickWidget.SizeRootObjectToView)
        self.qml.setSource(QUrl.fromLocalFile('./main.qml'))
        self.qml.show()
        Layout = QVBoxLayout(self)
        Layout.addWidget(self.qml)
        Layout.setContentsMargins(0, 0, 0, 0)


app = QApplication(sys.argv)

if True:
    parent = QQuickWidget()
    parent.setResizeMode(QQuickWidget.SizeRootObjectToView)
    parent.setSource(QUrl.fromLocalFile('./main.qml'))
    parent.resize(400, 600)
    parent.show()
else:
    parent = Parent()
    parent.resize(800, 600)
    parent.show()

app.exec()

import QtQuick 2.10
import QtQuick.Controls 2.3


    Rectangle {
        color: '#aa0000ff'
        anchors.fill: parent
        onHeightChanged: print('***', width, height)
    }