ReferenceError: "something" is not defined in QML

Question

I have Main.qml file like this:

import QtQuick 2.0    

Rectangle {
    color: ggg.Colors.notificationMouseOverColor
    width: 1024
    height: 768
}

in python file, i have this(i use form PyQt5):

App = QGuiApplication(sys.argv)
View = QQuickView()
View.setSource(QUrl('views/sc_side/Main.qml'))
Context = View.rootContext()

GlobalConfig = Config('sc').getGlobalConfig()
print (GlobalConfig, type(GlobalConfig))
Context.setContextProperty('ggg', GlobalConfig)

View.setResizeMode(QQuickView.SizeRootObjectToView)
View.showFullScreen()
sys.exit(App.exec_())

this python code print this for config:

{'Colors': {'chatInputBackgroundColor': '#AFAFAF', 'sideButtonSelectedColor': '#4872E8', 'sideButtonTextColor': '#787878', 'sideButtonSelectedTextColor': '#E2EBFC', 'sideButtonMouseOverColor': '#DDDDDD', 'buttonBorderColor': '#818181', 'notificationMouseOverColor': '#383838', }} <class 'dict'>

when i run this code, my rectangle color change correctly, but i have this error:

file:///.../views/sc_side/Main.qml:6: ReferenceError: ggg is not defined

but i don't know why this error happend, how i can fix this error?

Answer 1

You need to set the context property before you call View.setSource, otherwise at the moment the qml file is read the property ggg is indeed not defined.

Try this:

App = QGuiApplication(sys.argv)
View = QQuickView()
Context = View.rootContext()

GlobalConfig = Config('sc').getGlobalConfig()
print (GlobalConfig, type(GlobalConfig))
Context.setContextProperty('ggg', GlobalConfig)

View.setSource(QUrl('views/sc_side/Main.qml'))    
View.setResizeMode(QQuickView.SizeRootObjectToView)
View.showFullScreen()
sys.exit(App.exec_())

Disclaimer: without knowing what Config is, I can't say if it will really work without any other modification.