void MButtonGroupPrivate::buttonToggle(bool checked)
{
Q_Q(MButtonGroup);
MButton *button = static_cast<MButton *>(this->sender());
if (!button) {
mWarning("MButtonGroup") << "buttonToggle(): slot unexpectedly called by someone else than MButton";
return;
}
if (!button->isCheckable()) {
mWarning("MButtonGroup") << "buttonToggle(): Cannot check non-checkable button.";
return;
}
if (checked && q->exclusive() && checkedButton) {
exclusive = false;
checkedButton->setChecked(false);
exclusive = true;
}
if (checked) {
checkedButton = button;
} else if (checkedButton == button) {
/* If a button is unchecked and its same as checkedButton, then
checkedButton should be reset as well */
checkedButton = 0;
}
}
void MButtonGroupPrivate::enforceExclusivity()
{
if (!exclusive)
return;
/* In case of exclusive mode:
case 1: If there is no button checked, find the first checkable
button check it.
case 2: If there is more than one button checked,
uncheck all buttons except the first checked one
*/
MButton *checkableButton = 0;
MButton *newCheckedButton = 0;
QList<MButton *>::iterator i = buttonList.begin();
while (i != buttonList.end()) {
MButton *b = *i;
/* Get the first checkable button */
if (b->isCheckable() && checkableButton == 0) {
checkableButton = b;
}
/* Set the first checked button and uncheck the rest */
if (b->isChecked()) {
if (newCheckedButton == 0) {
newCheckedButton = b;
checkedButton = b;
} else {
b->setChecked(false);
}
}
++i;
}
if (checkedButton == 0 && checkableButton != 0) {
/* Make sure that exactly one button is checked */
checkableButton->setChecked(true);
checkedButton = checkableButton;
}
}
