如何使 QCheckBox 只读，但不灰显

Question

Any good way to make a checkbox readonly, but also not grayed-out (hardly visible).

1. I have used setEnabled(bool) which works, but the checkbox then is grayed-out and hardly readable
2. I can react on a toggle signal and reset the state. But I would need a kind of flag to determine if the box is read-only and then reset the check state, means I need to create my own CheckBox class.

3. setCheckable does not work either, it does not allow me to set a checked state at all:

    cb = this->ui->cb_RealWorld->isCheckable(); this->ui->cb_RealWorld->setCheckable(true); this->ui->cb_RealWorld->setChecked(someValue); this->ui->cb_RealWorld->setCheckable(cb);

So the best thing I have is to use enable/disable and accept the grayed out style.

------- Edit -------

Following the stylesheet examples I was hoping I could set the style of a disabled checkbox like the one of an enabled. Failed so far to do so. More specific: Changing the icon like in the examples does not work for me, maybe because I am using Windows and the icons are not available under the path as in the examples.

---

PS: Related, but no answer here

Disabling a QCheckbox in a tricky way
Qt - How to disable QCheckBox while retaining checked state?

Answer 1

Following the below my code:

this->ui->cb_RealWorld->setAttribute(Qt::WA_TransparentForMouseEvents);
this->ui->cb_RealWorld->setFocusPolicy(Qt::NoFocus);

Answer 2

This is Devopia's solution as a function:

void SetReadOnly(QCheckBox* checkBox, bool readOnly)
{
   checkBox->setAttribute(Qt::WA_TransparentForMouseEvents, readOnly);
   checkBox->setFocusPolicy(readOnly ? Qt::NoFocus : Qt::StrongFocus);
}

Answer 3

在 Windows 上，请记住#include "windows.h"并设置如下标志：

this->ui->cb_RealWorld->setWindowFlags(this->ui->cb_RealWorld->windowFlags() | Qt::WindowTransparentForInput);

Answer 4

Inherit from QCheckBox and override nextCheckState method https://doc.qt.io/qt-5/qcheckbox.html#nextCheckState do the trick.

void ReadOnlyCheckBox::nextCheckState()
{

}