I have tried this code:
def open_color_dialog(self, label):
dialog = QColorDialog()
dialog.setOption(QColorDialog.ShowAlphaChannel, on=True)
print(dialog.testOption(QColorDialog.ShowAlphaChannel)) #returning True
color = dialog.getColor()
if color.isValid():
label.setStyleSheet("background-color:" + color.name() + ";")
But this code didn't work. How can I show alpha channel?
The problems are:
The dialog
object of the QColorDialog class has been created but you use the static QColorDialog::getColor()
method that creates a new QColorDialog object that is displayed.
def open_color_dialog(self, label): dialog = QColorDialog() dialog.setOption(QColorDialog.ShowAlphaChannel, on=True) if dialog.exec_() == QDialog.Accepted: color = dialog.selectedColor() if color.isValid(): #...
or
def open_color_dialog(self, label): color = QColorDialog.getColor(options=QColorDialog.ShowAlphaChannel) if color.isValid(): #...
The name
method of QColorDialog by default will return only rgb, if you want to get argb then you must use QColor.HexArgb as parameter:
label.setStyleSheet( "background-color:{};".format(color.name(QColor.HexArgb)) )
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.