qml - How to show a window?

twar

There is this book about qml http://qmlbook.github.io/en/ch02/index.html
and when I tried to run this example in qt creator or as ./project_name where project_name is executable file created by qt creator there is no visible window:


Rectangle {
    width: 360
    height: 360
    Text {
        anchors.centerIn: parent
        text: "Hello World"
    }
    MouseArea {
        anchors.fill: parent
        onClicked: {
            Qt.quit();
        }
    }
}

why is that?
Am I missing soething or maybe I have chosen wrong project type (Qt Quick Application - Empty)?
The only way to see the window is to run:
**qmlscene main.qml**

JKSH

@twar said in qml - How to show a window?:

when I tried to run this example in qt creator or as ./project_name where project_name is executable file created by qt creator there is no visible window:
...
why is that?
...
The only way to see the window is to run:
qmlscene main.qml

You used a Rectangle as your application's top-level object. However, a Rectangle needs to be put in an actual window to be seen. To create a window for this file, on the C++ side you must to load your QML file in a QQuickView or QQuickWidget. This is the old way of displaying a QML-based GUI.

Note: qmlscene contains a QQuickView that dynamically loads the QML file that you specify.

The new way does not require QQuickView or QQuickWidget; instead, it lets you define a window directly in QML code. To see it in action, just create a new Qt Quick Application (it doesn't matter which type) and look at the auto-generated code. You'll see that it has a Window at the top-level, not a Rectangle.

EDIT: The auto-generated code is complete. You can run it.

There is this book about qml http://qmlbook.github.io/en/ch02/index.html
...
Am I missing soething or maybe I have chosen wrong project type (Qt Quick Application - Empty)?

That tutorial was written before it was possible to create a Window in QML code.

streetcoder

@JKSH Im following the beginner tutorial and it says to replace the Window object with a Rectangle object to set state, yet when I do that, no graphic is fired when the app is ran. Any idea how I can set the state on a window object or get the rectangle object to show up?

JKSH

@streetcoder said in qml - How to show a window?:

Im following the beginner tutorial and it says to replace the Window object with a Rectangle object to set state, yet when I do that, no graphic is fired when the app is ran. Any idea how I can set the state on a window object or get the rectangle object to show up?

I'm not sure which tutorial you mean. Can you please post your code?

(Also, in the future please open a new thread for new questions)