QToolBar setstylesheet Problem

[muro345]

i solved the toolbar problem like this:

QToolBar#myToolBar > QWidget {
    background: blue;
}

QToolBar#myToolBar > QWidget {
    background: blue;
}

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if i do this:

QToolBar#myToolBar {
    background: blue;
}

QToolBar#myToolBar {
    background: blue;
}

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only the action buttons get colored.

i got some other problems with style though.
problem appears if I use my own class inherited from QWidget

class my_widget_class : public QWidget
{
Q_OBJECT
 
public:
    my_widget_class(QWidget* );
    QListView * listView;
    void mouseMoveEvent(QMouseEvent* pEvent);
 
};

class my_widget_class : public QWidget
{
Q_OBJECT
        
public:
    my_widget_class(QWidget* );
    QListView * listView;
    void mouseMoveEvent(QMouseEvent* pEvent);
     
};

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implementation looks like this:

my_widget_class*    my_widget;
 
/* some ui code here */
 
my_widget = new my_widget_class (centralWidget);
my_widget->setObjectName("my_widget_00");
my_widget->setGeometry(QRect(100,100,100,200));

my_widget_class*    my_widget;

/* some ui code here */

my_widget = new my_widget_class (centralWidget);
my_widget->setObjectName("my_widget_00");
my_widget->setGeometry(QRect(100,100,100,200));

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the style sheet is like this:

my_widget_classt#my_widget_00 {
     background-color: blue;
     border-style: outset;
     border-width: 2px;
     border-radius: 20px;
     border-color: red;
     font: bold 14px;
     min-width: 10em;
     padding: 6px;
}

my_widget_classt#my_widget_00 {
     background-color: blue;
     border-style: outset;
     border-width: 2px;
     border-radius: 20px;
     border-color: red;
     font: bold 14px;
     min-width: 10em;
     padding: 6px;
}

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i also tried style with QWidget#my_widget

it works if i replace my_widget_class with QWidget in the code (like: "my_widget = new QWidget(centralWidget);" )
is this a normal behaviour? i think it should recognise my new class as QWidget...
i use the same method for my main window class, but this works fine.