dialog when closing window

[summerfang]

I want to use a dialog when closing the window to make sure that the user really wants to close the current window( I don't want to quit qt, I just want to close the current window. There are also some other windows running in this project. ). And my code is something like

ApplicationWindow {
    id:root
    visible: true
    title: qsTr("Main Window")
    Dialog {
        id: adialog
        title: "Warning"
        standardButtons: StandardButton.Yes |  StandardButton.Cancel
        Label {
            text: "Are you sure to close?"
        }
        onYes:{
            root.close();
        }
    }
  onClosing: {close.accepted = false ;
      adialog.open();}
}

However, when I click the "Yes" on the dialog, it cannot close the window. I also tried to add something like " root.onClosing.close.accepted = true;" to the onYes propery of the dialog, but also failed. Anyone has idea about how to close the window properly using the dialog? thanks!!

[Roumed]

In onYes slot you should call Qt.quit();.
http://doc.qt.io/qt-5/qml-qtqml-qt.html#quit-method

[summerfang]

@Roumed I don't want to quit qt, I just want to close the current window. There are also some other windows running in this project. I'll add this in this question description, thank you for pointing out that.

[Vicky Sharma]

You want quit only application window?

If yes then you may try this 'root.visible = false'

[Roumed]

@summerfang Ow.
If so, I think, there is no one-string-way to solve this problem.
You can use some kind of flag to admit closing from dialog.

[summerfang]

@Roumed Thank you, could you please give me a little more tips about how to set the flag? I tried different methods I could do but no one works...

[Roumed]

Something like this:

ApplicationWindow {
    id:root
    visible: true
    title: qsTr("Main Window")



    Dialog {
        id: adialog
        title: "Warning"
        standardButtons: StandardButton.Yes |  StandardButton.Cancel
        Label {
            text: "Are you sure to close?"
        }
        onYes:{
            root.isCloseAdmitted = true;
            root.close();
        }
    }

    property bool isCloseAdmitted: false
    onClosing: {
        if (!isCloseAdmitted) {
            close.accepted = false ;
            adialog.open();
        }
    }
}

[summerfang]

@Roumed Thanks a lot, I tried this but the window does not close after I clicked "Yes". I must click the "x" once again after the dialog disappears.

[Roumed]

@summerfang My bad.
Dialog blocks closing.

onYes: {
    root.isCloseAdmitted = true;
    close()
    root.close();
}

[summerfang]

@Roumed Oh, so it is! Thank you so much!!