Get margins of QPushButton

[goldstar2154]

Is there any way to get margins settled via QSS from code?

QSS:

QPushButton {
    background: #E1E1E1;
    border-style: solid;
    border-color: #ADADAD;
    border-width: 1px;
    margin: 5px;
}

Code:

void QDelayPushButton::paintEvent(QPaintEvent* event)
{
    QPushButton::paintEvent(event);
    QPainter painter(this);
    QRect workRect = rect();               // Always return full button rect
    QRect rect2  = contentsRect();         // Always = workRect;
    QMargins margins = contentsMargins();  // Always 0, 0, 0, 0 (no matter what in qss)
    ...
}

Example:

[raven-worx]

@goldstar2154
thats a really strange issue. Maybe also a bug?!
The margin property is supported for the QPushButton widget (see here)
But for QPushButton it indeed returns 0 in all cases, even the margin actually gets applied. See the following example:
For QFrame:

QFrame b;
        b.setStyleSheet( "margin: 10px;" );
    b.show();
    qDebug() << b.geometry() << b.contentsRect() << b.contentsMargins(); // QRect(640,280 640x480) QRect(10,10 620x460) QMargins(10, 10, 10, 10)

Same for QPushButton:

QPushButton b;
        b.setStyleSheet( "margin: 10px;" );
    b.show();
    qDebug() << b.geometry() << b.contentsRect() << b.contentsMargins(); // QRect(640,280 46x35) QRect(0,0 46x35) QMargins(0, 0, 0, 0)

So the behavior is inconsistent. So this would be a interesting question for the dev mailing list or even worth a bugreport IMO.

Although you wouldn't receive a margins value of 5 but of 6 (incl. 1px border width). See box model

[goldstar2154]

Shoud i open bug?) Have developers read this forum?

[raven-worx]

@goldstar2154 said in Get margins of QPushButton:

Shoud i open bug?
Either open a bug or write to the dev mailing list as i wrote.

Have developers read this forum?

no this forum isn't read by the developers. The dev mailing list is.

[zhangsi]

you can call QPushButton::styleSheet function to get margin from string, why not

[raven-worx]

@zhangsi said in Get margins of QPushButton:

you can call QPushButton::styleSheet function to get margin from string, why not

if it just would be that easy...

[CppHamster]

@goldstar2154 , @raven-worx Have you found how to solve this problem with qpushbutton margins in paintevent?

[raven-worx]

@CppHamster
you can try the QStyle way:

void QDelayPushButton::paintEvent(QPaintEvent* event)
{
      QPushButton::paintEvent(event);

      QStyleOptionButton option;
      this->initStyleOption(&option);
      QRect contentsRect = this->style()->subElementRect( QStyle::SE_PushButtonLayoutItem, &option, this );
      ...
}

[CppHamster]

@raven-worx Thank you! But still does not work

[CppHamster]

@raven-worx finally, i've got the contents size by using your advice:
1: QRect contentsRect1 = this->style()->subElementRect( QStyle::SE_PushButtonLayoutItem, &option, this );
2: QRect contentsRect2 = this->style()->subElementRect( QStyle::SE_PushButtonContents, &option, this );
3: QRect contentsRect3 = this->style()->subElementRect( QStyle::SE_PushButtonFocusRect, &option, this );

qDebug() with QPushbutton properties:
width: 134
height: 45
.....
QMargins(0, 0, 0, 0) // <- QMargins margins = this->contentsMargins();
.....
1: QRect(0,0 0x0)
2: QRect(1,1 132x43)
3: QRect(1,1 132x43)

The difference is border width.

[CppHamster]

@goldstar2154 if the code is correct, you can mark this question as "solved"

[goldstar2154]

@CppHamster this code is correct technically, but not logically. If we have contentsMargins() method it shoud work...
P.S. i've marked question as solved, but still think is a bug
P.P.S. and thanks for solution, of course)

[CppHamster]

@goldstar2154 Totally agree with you - there is a obvious bug. But thanks to @raven-worx 's code we've got a way to get a result at least. And "solved" will help in web search:)
Thank you very much for this question:)