QQmlApplicationEngine is a class from the Qt Toolkit which provides a convenient way to load an application from a single QML file.
Documentation can be found here (Qt5).
Questions tagged [qqmlapplicationengine]
67 questions
2
votes
1 answer
Use QQuickView or QQmlApplicationEngine to switch between pages from ApplicationWindow
I'd like to use an ApplicationWindow as a main file and be able to switch to other QML files from C++ with QQuickView::setSource(const QUrl & url). Basically it would do this:
start-up => loads main.qml (ApplicationWindow) => click on help button =>…
Grégoire Borel
- 1,880
- 3
- 33
- 55
1
vote
1 answer
QQmlApplicationEngine failed to load component when I'm trying to use external library (canlib) import
I'm constructing an application via Python as backend and QT QML as frontend.
I use Win10, PyCharm 2022.3.1 (Community Edition), Pyside6 and QT Design Studio (not QT Creator). All libraries installed by pip using terminal or through PyCharm library…
Alexander Poverennov
- 11
- 2
1
vote
1 answer
"TypeError: Property 'someFunction' of object [object Object] is not a function" and "TypeError: Type error" when exposing C++ class to QML
I keep getting this error for some reason. Everything seems to work when I use this to pass a C++ class instance to QML.
main.cpp:
QQmlApplicationEngine engine;
gui::Wallet wallet;
engine.rootContext()->setContextProperty("Wallet", &wallet);
But…
Jack Kinnof
- 11
- 4
1
vote
1 answer
Error in getting the root object from QQmlApplicationEngine in Component.onCompleted
I try to get the root object after window having completed, but I get a error:
QmlObj = self.engine.rootObjects()[0]
Error: list index out of range
The strange thing is that it works when I try to call foo.init_window() after the MouseArea having…
lxchx
- 25
- 5
1
vote
0 answers
trying to communicate arduino to pc via qserialport
to connect arduino to PC after creating a qtquick based application, I created arduino.cpp and arduino.h files. There is something wrong in the code but I can't get it and resolve it. Please, if someone can help, here are the .cpp and .h files. I…
Sabrine Elhadji
- 19
- 2
1
vote
1 answer
How to find the source of a recursive rearrange in QML
I updated my QML application from Qt 5.12 to Qt 5.15.
My application loads its qml sources using the following code:
auto* engine = new QQmlApplicationEngine(this);
...
engine->load(QUrl("qrc:/main.qml"));
When engine->load is called, I now get the…
FourtyTwo
- 1,616
- 2
- 15
- 43
1
vote
1 answer
Is there any way to embed a QWidget inside a QQmlApplicationEngine or QQuickView?
I found a way to embed a QWidget in a QML, by using QQuickWidget render (anchoring, the QWidget with the QQuickWidget position), but I am trying to do the same using QQuickView/QmlApplicationEngine, which uses a different rendering system, and the…
laurapons
- 971
- 13
- 32
1
vote
1 answer
QQmlApplicationEngine::loadData() works on DEBUG, but fails on RELEASE
(Qt 5.12.2( mingw 7.3 32-bit ) Windows 8 64-bit)
The next code works on DEBUG, but fails on RELEASE mode:
#include
#include
#include
#include
#include
#include…
user3182094
- 21
- 6
1
vote
1 answer
how to import a QML Component resource in a QML file
I have the following directory structure:
ui/
|- resources.qrc
|- qml/
|- main_window_presenter.qml
|- MyPresenter.qml
resources.qrc contents:
qml/MyPresenter.qml
…
Alp
- 553
- 11
- 30
1
vote
1 answer
Dynamically created Custom QML object not visible
I have a custom QML item called "Cell.qml" which I'd like to insert dynamically in my root window and make it visible. I also tried changing the z property, but I couldn't fix it, the object is still invisible (even tough the output of…
Felipe Vieira
- 13
- 3
1
vote
3 answers
QML Image not displaying in Application
I am having trouble displaying a simple image into my application.
Here's the main.py:
import sys
from PyQt5.QtQml import QQmlApplicationEngine
from PyQt5.QtGui import QGuiApplication
from PyQt5.QtCore import QObject, QUrl
if __name__ ==…
HaR
- 987
- 7
- 23
1
vote
0 answers
QML WebEngineView.runJavaScript failed to run HTML Java Script method
Work environment : Windows 7 64 bit, QT 5.8 64 bit, Compiler : VS2015 64 bit.
Using WebEngineView I am loading HTML page, HTML have Script function
function OnClick()
{
document.getElementById('txtName').value = "10";
}
But Using…
Sandip
- 51
- 11
1
vote
1 answer
PyQt: How to get the root object from QQmlApplicationEngine
I try to display a dynamic object using PyQt and QML, But I get this error:
win = engine.rootObjects()[0]
IndexError: list index out of range
Here is my code PyQt:
import sys
import os
from PyQt5.QtWidgets import QApplication
from PyQt5.QtQml…
karahman
- 11
- 1
- 4
1
vote
1 answer
QtQml installation in Raspberry pi
I am stuck with one error while building PyQt5 for rasberry pi. I was successfully able to run the application which uses QQmlApplicationEngine on Windows Desktop. Now I wanted to run the same application in Raspberry pi 3. I build the PyQt5…
ryuk
- 47
- 2
- 7
1
vote
3 answers
How does one change the model property of a TableView in qml from c++
I am relatively new to QT, so any help would be greatly appreciated!
I am working on a Qt Quick Application, making use of the QQmlApplicationEngine for the UI. I made a subclass of QAbstractTableModel and implemented the necessary functions and…
thats_nice
- 21
- 4