Can I un-check a group of RadioBottoms inside a group box?

问题

radio bottoms inside a group Box will be treated as a group of bottoms. They are mutual exclusive. How can I clean up their check states??

I have several radio bottoms, one of them are checked. How can I "clean" (uncheck) all radio bottoms?? "setChecked" doesn't work within a group, I tried to do following things but failed.

My code is as following, radioButtom is inside a groupBox, and I want to unchecked it. The first setChecked does works, but the second one doesn't, the radioBottom doesn't been unchecked

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    QRadioButton *radioButton;
    ui->setupUi(this);
    radioButton->setChecked(true);
    radioButton->setChecked(false);
}

Where is the problem in my code?

回答1:

The trick is to disable the autoExclusive property before unchecking it, then re-enabling it.

ui->radioButton->setChecked(true);
ui->radioButton->setAutoExclusive(false);
ui->radioButton->setChecked(false);
ui->radioButton->setAutoExclusive(true);

After this, the radioButton is unchecked.

回答2:

In Qt documentation said: A QRadioButton is an option button that can be switched on (checked) or off (unchecked). Radio buttons typically present the user with a "one of many" choice. In a group of radio buttons only one radio button at a time can be checked; if the user selects another button, the previously selected button is switched off. AFAIK I think that you will not be able to check off all QRadioButtons.

In my practice, I have never seen all checked off at once QRadioButtons in one dialog/window. But may be I have mistaken.

As the solution from my side, I may offer you to create one additional QRadioButton, and then hide it, so, when you need to hide all QRadioButton on one widget, you could just setChecked(true) on the hidden one.

Good luck.

来源：https://stackoverflow.com/questions/2816229/can-i-un-check-a-group-of-radiobottoms-inside-a-group-box

标签

c++

qt4

radio-button

groupbox