Details
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Bug
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Resolution: Unresolved
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P2: Important
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None
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6.7.0, 6.8.0
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None
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Windows
Description
Setting the background via StyleSheets on a QComboBox or "QComboBox QAbstractItemView" in combination with `setView` leads to the popup not showing at all on windows if inside a QScrollArea.
Everything works as expected if NOT in a QScrollArea and without changing the background via stylesheets.
Potentially related to https://bugreports.qt.io/browse/QTBUG-123722
Tested with "Fusion" and Windows11 styles.
I did not yet test other versions besides 6.5.1 where this worked without any issues.
Reproducible example
#include <QApplication> #include <QTableWidget> #include <QComboBox> #include <QVBoxLayout> #include <QLabel> #include <QScrollArea> int main(int argc, char *argv[]) { QApplication a(argc, argv); a.setStyle("Fusion"); a.setStyleSheet("QComboBox QAbstractItemView { background: red; }"); QComboBox *box = new QComboBox(); QTableWidget *table = new QTableWidget(); table->setColumnCount(2); table->setRowCount(10); box->setModel(table->model()); box->setView(table); QComboBox *box2 = new QComboBox(); for(int i = 0; i < 10; ++i){ QTableWidgetItem *itm = new QTableWidgetItem(); itm->setData(Qt::DisplayRole, "asd"); table->setItem(i, 0, itm); table->setItem(i, 1, new QTableWidgetItem(" - var")); box2->addItem("qwe"); } QFrame *frame = new QFrame(); QVBoxLayout *l = new QVBoxLayout(frame); l->addWidget(new QLabel("Pre")); l->addWidget(box); l->addWidget(box2); l->addWidget(new QLabel("Post")); QScrollArea *area = new QScrollArea(); area->setWidget(frame); area->show(); return a.exec(); }