QToolbar stylesheet

[Gianluca86]

Hello everyone, when a toolbar has too many buttons or resizing the window, you see a button to display the missing buttons. (See image below)
Screenshot
I wanted to know if it is possible to increase the width. Looking at the documentation I found nothing, maybe I have not tried the exact name.
Thank you

[Ni.Sumi]

@Gianluca86 said:

I wanted to know if it is possible to increase the width

This you can do using set Geometry, toolbar->setGeometry(x,y,width,height)

Are you looking some thing like resize the toolbar basing on the mainWindow size? or fixed width of toolbar?

[Gianluca86]

No, maybe I explained badly. I will not enlarge the toolbar, but the size of the ">>" button that is circled in red in the image.

[raven-worx]

@Gianluca86
example QSS selector:

QToolBar > QToolBarExtension#qt_toolbar_ext_button {
    ...
}

now you can play around with the min-width, margin, etc properties

[Gianluca86]

I tried:

MainToolBar.setStyleSheet("QToolBar > QToolBarExtension#qt_toolbar_ext_button { background-color: red; min-width: 28px;}");

It seems to work, but cuts the button.
Screenshot

[raven-worx]

@Gianluca86
ah sorry my fault.
This can't be achieved with QSS only.
You would need to subclass QProxyStyle and reimplement pixelMetric().
In there return the desired value for QStyle::PM_ToolBarExtensionExtent

But i am afraid you can't use QProxyStyle in combination with stylesheets (anywhere in the parent hierarchy), since they rid themselves out mutually.

[Gianluca86]

Ok, I tried this:

// MyStyle.h
#include <QStyle>

class MyStyle : public QStyle
{
public:
    MyStyle();
    virtual int pixelMetric(PixelMetric pm, const QStyleOption* option, const QWidget* widget) const ;
};

// MYStyle.cpp
#include "MyStyle.h"

MyStyle::MyStyle()
{

}

int MyStyle::pixelMetric(PixelMetric pm, const QStyleOption* option, const QWidget* widget) const
{
  if (pm == QStyle::PM_ToolBarExtensionExtent)
    return 50; 
  return QStyle::pixelMetric(pm, option, widget);
}

Is it correct?

The line

return QStyle::pixelMetric(pm, option, widget);

give me this error:
error: undefined reference to `QStyle::pixelMetric(QStyle::PixelMetric, QStyleOption const*, QWidget const*) const'