QT / QML从主窗口重新打开新窗口

Question

I started working on QT/QML, PyQt Desktop Application. I have some basic knowledge of Qt/QML and all.

I'm trying to modify one Desktop Application already Exists.

Here is I've add one Button in Main Window of Application which Open another Window.

main.qml

Button {
    text: "Open Window"

    Loader{ id: pageLoader }

    onClicked: {
        console.log("Clicked")
        pageLoader.source = "testing.qml"
    }
}

testing.qml

import QtQuick 2.2
import QtQuick.Window 2.2

Window {
    id: win1
    width: 1000;
    height: 1000;
    visible: true;
    visibility: "Maximized"
    color: "#363636";
    title: "First Window";
    Text {
        anchors.centerIn: parent
        text: "Page 1"
    }
    MouseArea{
        anchors.fill: parent;
        onClicked: pageLoader.source="";
    }
}

When I clicked on Button, New Window is open Successfully. But When I closed new Window and Tried to reopen, It'll not open. It just print "Clicked".

Answer 1

Your problem is, that you clear the Loader s source, only when you close the window by clicking on the MouseArea it contains. If you close it with the x -button you don't clear it, so the loader stays active and the source stays the same.

To solve this, you can either make sure, the source changes, when ever you click the open- Button , by having

onClicked: {
    pageLoader.source = ""  // Clearing first
    pageLoader.source = "testing.qml" // Setting again
}

or by using the Window s closing() -signal

onClosing: pageLoader.source = ""