QStyleOptionButton cloud be set background color?

[qazaq408]

QStyleOptionButton cloud be set background color?

There's a table that's show some information of a group device, I use model+qtableview,one column of the table is show switch for user, and user need the power of control the switch.so i use QStyledItemDelegate to show a button in this column.For better user experience,i hope the switch(QStyleOptionButton)is yellow when the device is running and green when the deivce is stop.

void ChooseWatchObjectDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    QStyleOptionButton btn;
    btn.rect = option.rect;
    bool fg = index.model()->data(index).toBool();
    if(fg == true)
    {
        btn.palette.setBrush(QPalette::Button,QBrush(QColor(Qt::green)));//it doesn't work.....
        btn.text = tr("启动");
    }
    else
    {
        btn.palette.setBrush(QPalette::Background,QBrush(QColor(Qt::red)));//it also doesn't work.....
        btn.text = tr("停止");
    }
    btn.state |= QStyle::State_Enabled;
    painter->setBrush(QColor(Qt::red));  //it's still unuseful...
    if(option.widget != NULL)
        QApplication::style()->drawControl(QStyle::CE_PushButton,&btn,painter);
    else
        option.widget->style();
}

[qazaq408]

I try to use setStyleSheet in the delegate

setStyleSheet("QPushButton{background-color:red}");

it still doesn't work....

[SGaist]

Hi,

You are modifying the painter object but you are then calling the style of QApplication to paint. Why don't use use painter ?

Misread the code.

[edit: SGaist]

[qazaq408]

@SGaist
Thank you..

you mean that's create a new painter?

 painter->setBrush(QColor(Qt::red));  //it's still unuseful...

It doesn't work...

[SGaist]

Sorry, my bad, I misread your code.

What platform are you on ?
With which version of Qt ?

Can you also show what you are currently getting ?

[SGaist]

You might want to call

painter->fillRect(btn.rect, btn.palette.brush(QPalette::Button));

Before drawing the button on top of it.

[qazaq408]

@SGaist
win7 + Qt5.9 + mingw32

I had tried

    if(option.widget != NULL)
    {
        painter->fillRect(btn.rect,btn.palette.brush(QPalette::Button)); //It doesn't work
        QApplication::style()->drawControl(QStyle::CE_PushButton,&btn,painter);
    }
    else
        option.widget->style();

I also tried

    if(option.widget != NULL)
    {
        btn.palette.setBrush(QPalette::Background,QBrush(QColor(Qt::red)));
        painter->fillRect(btn.rect,btn.palette.brush(QPalette::Button));  //unused.......
        QApplication::style()->drawControl(QStyle::CE_PushButton,&btn,painter);
    }
    else
        option.widget->style();

It's a question ~。~

[qazaq408]

Could someone give me help......
on those days,I trid to use a pix to replace the button,but when I clicked the button(It's is a pix in fact),it doesn't look like a button,because the button will changed when it clicked by mouse but pix not
More important,my boss denied my plan that's replace the button by a pix....

[mrjj]

Hi
I think i used QStyle::CE_PushButtonLabel instead to get it to be transparent as
QStyle::CE_PushButton ignored all QBrush.
If that fails too, you could use icon on button to show state.

[JohnMPaine]

@qazaq408 said in QStyleOptionButton cloud be set background color?:

btn.palette.setBrush(QPalette::Background,QBrush(QColor(Qt::red)));
painter->fillRect(btn.rect,btn.palette.brush(QPalette::Button)); //unused.......

Have you tried
painter->fillRect(btn.rect, btn.palette.brush(QPalette::Background));
instead of
painter->fillRect(btn.rect, btn.palette.brush(QPalette::Button));

[qazaq408]

@JohnMPaine
tried....
And then ,the whole button has filled....the txt of button can't be seen.....