Details
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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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5.12.2
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None
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Linux with Qt 5.12.2
Windows with Qt 5.14.x
Believed to apply to all platforms/versions.
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Linux/X11,
Windows
Description
Summary:
You cannot set background/foreground colour on the QLineEdit of a QSpinBox, if any ancestor has its background/foreground colour set. This may apply to other attributes, not tested.
I have seen this under Linux with Qt 5.12.2. Someone else has confirmed it is the case under Windows with Qt 5.14.x, so believed to apply to all platforms/versions.
QSpinBox spin = new QSpinBox(whatever); QLineEdit lineEdit = spin->findChild<QLineEdit*>(); Q_ASSERT(lineEdit); lineEdit->setStyleSheet("background-color: blue;");
has no effect.
Example:
#include <QApplication> #include <QLineEdit> #include <QSpinBox> #include <QVBoxLayout> #include <QWidget> int main(int argc, char *argv[]) { QApplication a(argc, argv); QWidget w; QVBoxLayout layout; w.setGeometry(100, 100, 200, 200); w.setLayout(&layout); // commenting in/out next line makes `QLineEdit` in `QSpinBox` ignore/respect its own stylesheet colors // yet standalone `QLineEdit` respects its own stylesheet colors in either case w.setStyleSheet("background-color: yellow; color: green;"); QLineEdit lineEdit; layout.addWidget(&lineEdit); lineEdit.setText("99999"); // standalone `QLineEdit` always respects stylesheet, and behaves correctly lineEdit.setStyleSheet("background-color: cyan; color: red;"); QSpinBox spinBox; layout.addWidget(&spinBox); QLineEdit *spinLineEdit = spinBox.findChild<QLineEdit *>(); spinBox.setMaximum(99999); spinBox.setValue(99999); // `QLineEdit` in `QSpinBox` respects stylesheet, and behaves correctly, *ONLY IF ANCESTOR `QWidget` DOES NOT SPECIFY COLORS* // if parent `QWidget` does specify colors, next line has no effect on it! spinLineEdit->setStyleSheet("background-color: cyan; color: red;"); w.show(); return a.exec(); }
Comments describe behaviour.
With parent/ancestor w.setStyleSheet("background-color: yellow; color: green;"); line enabled, QSpinBox alone goes wrong while comparison QLineEdit works correctly, screenshot:
With parent/ancestor // w.setStyleSheet("background-color: yellow; color: green;"); line commented out, both behave correctly, screenshot:
[And btw if I set the stylesheet on the {{QSpinBox}} itself rather than its embedded line edit then that does work regardless of ancestor widget colours, but that is not what I want. It is an issue on the {{QLineEdit}} embedded in a {{QSpinBox}} only.]
Subclassing and passing your own QLineEdit to QAbstractSpinBox::setLineEdit() does not alter the behaviour.
I am looking for any suggested workaround right now if possible?
