Problem when switching between forms in QML

Hi everybody,
In my Qt project, i use QML for design my GUI. My program have a mainform and a number of .qml GUI file. When i want to show a QML form, i link the mainform.cpp --> to the .QML GUI file respectively.

here is my code

formmain.h

Code:

---

Q_INVOKABLE void configuration() { displayForm("qrc:/UI/frmconfiguration.qml");}
Q_INVOKABLE void mainScreen() { displayForm("qrc:/UI/frmmain.qml");}
    void displayForm(QString qmlFile)
    {
        QDeclarativeView* pView = loadForm(qmlFile);
        setCentralWidget(pView);
        pView->setFocus();
    }

---

formain.cpp

Code:

---

QDeclarativeView* FrmMain::loadForm(QString qmlFile)
{
    QDeclarativeView* pDeclarative = new QDeclarativeView(QUrl(qmlFile));
    pDeclarative->setResizeMode(QDeclarativeView::SizeRootObjectToView);
    pDeclarative->rootContext()->setContextProperty("navigator",this);
    return pDeclarative;
}

---

in the .QML GUI form, when an event buttonpressed occur, the navigator is called. For example when i'm in formmain and button Configuration is pressed, something like below is carry out :

Code:

---

Keys.onEnterPressed : navigator.frmconfiguration()

---

But the problem here is : when i press button Configuration and switch to new Configuration GUI form, the system doesn't focus to this new form unless i use mouse to click on this new form ( Configuration Form )

This bug is very critical for my project , so could anybody help me fix this bug :( i'm very respected for your help :(:(

sincerely