spawning multiple windows

[dorukotiv]

Hello,

I am struggling on spawning multiple windows from a one application. Is there a way to do that?

[LeonMatthesKDAB]

Hi, thank you for your interest in CXX-Qt.

Can you please provide more detail about the issue. What code are you currently running? What's the error you get? And are you using the stable version of CXX-Qt (0.6), or working with the main branch?

Creating multiple windows using QML should work as it does in any other Qt/QML application. Please note that if your window isn't the root item of your QML file, you may have to explicitly call show on it.

Example:

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Window 2.15

Item {
    Component.onCompleted: {
        window1.show()
        window2.show()
    }
    ApplicationWindow {
        id: window1
        height: 480
        title: qsTr("First Window")
        visible: true
        width: 640

        Label {
            anchors.fill: parent
            text: "Hello world"
        }
    }
    ApplicationWindow {
        height: 480
        title: qsTr("Second Window")
        visible: true
        width: 640

        id: window2

        Label {
            anchors.fill: parent
            text: "Hello world"
        }
    }
}

[dorukotiv]

Hi, thank you for your interest in CXX-Qt.

Can you please provide more detail about the issue. What code are you currently running? What's the error you get? And are you using the stable version of CXX-Qt (0.6), or working with the main branch?

Creating multiple windows using QML should work as it does in any other Qt/QML application. Please note that if your window isn't the root item of your QML file, you may have to explicitly call show on it.

Example:

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Window 2.15

Item {
    Component.onCompleted: {
        window1.show()
        window2.show()
    }
    ApplicationWindow {
        id: window1
        height: 480
        title: qsTr("First Window")
        visible: true
        width: 640

        Label {
            anchors.fill: parent
            text: "Hello world"
        }
    }
    ApplicationWindow {
        height: 480
        title: qsTr("Second Window")
        visible: true
        width: 640

        id: window2

        Label {
            anchors.fill: parent
            text: "Hello world"
        }
    }
}

Thanks for the answer, that is enough for my question!

However, the issue I had with this is that when I look at a solution to my problem, I find C++ solutions and I panic that it doesn't exist in CXX-Qt. How should I address my problems? If a solution is in C++ code, can I somehow use this solution or should I go through Qt solutions first?

[LeonMatthesKDAB]

Happy to hear that works :)

Some C++ solutions may indeed not work with CXX-Qt immediately. Our goal is not to provide a complete Qt API. Rather we want to give you the tools you need to add the missing bits and pieces yourself.

Take a look at https://cxx.rs/ , which explains the foundation on which CXX-Qt is built. The basic idea is that CXX allows you to make C++ code callable in Rust and vice versa. CXX-Qt expands this functionality so that you can add QObjects in Rust. So you can try wrapping bits of C++ that you need yourself and calling them from Rust.

It's also possible to mix C++ and Rust with CXX-Qt. Take a look at the qml-minimal example, which uses a main.cpp, instead of a Rust file. That should work for pretty much all cases where C++ is normally used.