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Icon Dialog

  • Hello,

    Is it possible to set a Icon to a QML Dialog ?
    It seems that there is nothing in documentation for it :(

    simple Dialog
    On windows, RC_ICONS give only a Icon to the main windows

    Thank in advance

  • @didu
    I don't think this is possible in QtQuick. According to the documentation, the RC_ICONS feature is specific to both MS Windows and the main application window. There, it is not implemented via a component property (which I would consider more natural) but via something I would rather consider a QMakeFile hack. It also seems to rely on the Windows-specific .ico format for icons. Also note that showing icons in dialog titlebars is a feature that may not be common, enabled or available at all on some other platforms. So this feature shouldn't really play a significant role in app(lication) design decisions.

    That said, it should somehow be possible to achieve what you want via the lower level C++ side of the Qt world, using QStyleOptionTitleBar::icon and more general QIcon means. But likely not (yet?) via pure QML / QtQuick / JavaScript.

  • Moderators

    @didu If you are loading the QML from C++ side then you can use setWindowIcon. It will set icon on the title bar for main window as well as all its child windows.

    QGuiApplication app(argc, argv);
    QQmlApplicationEngine engine;

    Dialog invoked from main.qml will have that icon too.

  • @p3c0
    You are right it does. But it is the same behaviour as RC_ICONS ( ).
    main.qml and Dialog"child" have the icon.

    But theDialog in my app, that does not have a Icon, is a "child" of a StackView loaded by main.qml

  • Moderators

    @didu Tested something similar and it works. Can you post some code ?

  • @p3c0 Here is a "simple" test code
    The ProfileNameDialog has no Icon but the main.qml has :'(
    (I made test with and without "app.setWindowIcon")

    RC_ICONS += "logo.ico"


    #include <QApplication>
    #include <QQmlApplicationEngine>
    #include <QIcon>
    int main(int argc, char *argv[])
        QApplication app(argc, argv);
        QQmlApplicationEngine engine;
        return app.exec();


    import QtQuick 2.4
    import QtQuick.Controls 1.3
    import QtQuick.Window 2.2
    import QtQuick.Dialogs 1.2
    ApplicationWindow {
        title: qsTr("Hello World")
        width: 640
        height: 480
        visible: true
        Component {
            id: mainId
            MyMain {
        StackView {
            id: stack
            anchors.fill: parent
        Component.onCompleted: {


    import QtQuick 2.0
    import QtQuick.Controls 1.3
    Rectangle {
        width: 100
        height: 62
        Button {
            text: "Add"
            ProfileNameDialog {
                id: profileInputId
            onClicked: profileInputId.visible = true


    import QtQuick 2.0
    import QtQuick.Controls 1.2
    import QtQuick.Layouts 1.1
    import QtQuick.Dialogs 1.2
    Dialog {
        id: profileInputId
        title: "Profile name"
        visible: false
        standardButtons: StandardButton.Ok | StandardButton.Cancel
        TextField {
            id: profileNameId;
            placeholderText: "Profile name"
            width: parent ? parent.width : implicitWidth
        onAccepted: visible = false
        onRejected: visible = false;

  • Moderators

    @didu Icon specified through RC_ICONS will not be available at runtime in the code. It is used to set the icon for the executable which is created after compiling.
    In your case you need to store the icon in Qt's Resource System by creating a .qrc file. After that it will be accessible from the code. Eg:


    Another quick way to test it ls loading the ico file from a physical location. Eg:


    The above should work too.
    But a more practical approach is to use the Resource files. More info here.

  • @p3c0 Thanks you, you are right I had to use the Resource files.

    Now with the same test code I have provided:
    If I open the Dialog the first time, there is not Icon.
    I close the Dialog.
    I open a second time the Dialog, the Icon set with app.setWindowIconis shown.

    Have you already face such problem ?

  • Moderators

    @didu No. Never. In fact your code works perfectly.

  • @p3c0 Ok Thanks a lot again for your time ! <3

  • Moderators

    @didu You're Welcome :)
    Happy Coding...

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