[Qt-interest] QDialog with wrong contentsMargins()

[Kishore Jonnalagadda]

In alomost all my QDialog subclasses (using designer), I find that i need to 
add this to the constructor.

    layout()->setContentsMargins(
        style()->pixelMetric(QStyle::PM_LayoutLeftMargin),
        style()->pixelMetric(QStyle::PM_LayoutTopMargin),
        style()->pixelMetric(QStyle::PM_LayoutRightMargin),
        style()->pixelMetric(QStyle::PM_LayoutBottomMargin));

Without that it uses 11 pixels as the margins which is said to be the common 
default in the docs but is dependent on the style. Here on my system with the 
Oxygen style it should be 4 pixels (which is what is shown in designer when 
designing the dialog). However, i have to explicitly set it with the code 
above.

11 pixels is a bit too much and looks ugly. While i atleast have the option of 
putting the code above for most dialogs, the same i can't do with a QWizard 
(layout() return a NULL).

I'd like to know if my understanding is wrong* or if this is indeed a bug in 
Qt/Oxygen?
-- 
Cheers!
Kishore

* The layout system for widgets is quite complex I yet have not a grasp of how 
things work.