我想更改QPlainTextEdit
的背景颜色,我该怎么做?
Modify the palette of your plain text edit. Sample program:
#include <QApplication>
#include <QPlainTextEdit>
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
QPlainTextEdit edit;
QPalette p = edit.palette();
p.setColor(QPalette::Active, QPalette::Base, Qt::red);
p.setColor(QPalette::Inactive, QPalette::Base, Qt::red);
edit.setPalette(p);
edit.show();
return app.exec();
}
Substitute whatever color you want, of course.
Slightly confusingly they call it role rather than colour/color.
https://doc.qt.io/qt-5/qwidget.html#setBackgroundRole
hint - if you can't find a function for a particular control, click on show inherited members - most general settings are in qWidget which is the basis for eveything drawn on screen.
If QPlainTextEdit supports style sheets, you could do it like this:
myPlainTextEdit->setStyleSheet("background-color: yellow");
or
qApp->setStyleSheet("QPlainTextEdit {background-color: yellow}");
可能是你需要调用QPlainTextEdit::setBackgroundVisible(true)
。
In order to modify the background, you need to modify the palette of your QPlainTextEdit and to set background visible:
myPlainTextEdit->setPalette(QPalette(/*Select the constructor you need*/));
myPlainTextEdit->setBackgroundVisible(true);
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