QComboBox become ugly when changing main windows background

Question

Before changing:

After changing parent widget styleSheet property to this:

background-color: rgb(5, 34, 78);

I see this:

QComboBox become really different. What happens? How to use regular QComboBox on dark background?

I am using Qt 5.5 without QML.

Setting stylesheet discards style. Try using [QPalette](http://doc.qt.io/qt-5.5/qpalette.html). — Amartel, Jul 29 '15 at 07:03
@Amartel thanks, that work. Can you provide expanded description of happened problem so I will accept your answer? — k06a, Jul 29 '15 at 07:09

score 2 · Accepted Answer · answered Jul 29 '15 at 07:09

You have to set it to the main window only

yourWindow->setStyleSheet("{background-color: #HexNumber}");

or tell the QComboBox to not have style: yourWindow->setStyleSheet("QComboBox{background-color:none}");

or

yourWindow->setStyleSheet("QComboBox#ComboName{background-color:none}");

score 1 · Answer 2 · answered Jul 29 '15 at 08:33

According to manual:

When a style sheet is active, the QStyle returned by QWidget::style() is a wrapper "style sheet" style, not the platform-specific style. The wrapper style ensures that any active style sheet is respected and otherwise forwards the drawing operations to the underlying, platform-specific style (e.g., QWindowsXPStyle on Windows XP).

If all you want is to change some colors, leaving selected style unchanged, the better solution would be to use QPalette.

QComboBox become ugly when changing main windows background

2 Answers2