Is it possible to pass parameters to a slot that were not emitted by a signal?

[kramed]

Hi. I have numerous checkboxes that are each linked with a respective Spinbox. What I am trying to accomplish, with minimal code, is to append a suffix to the spinbox when the checkbox is checked. I have 8 sets of checkboxes/spinboxes and I am trying to make them utilize a single slot to accomplish my needs. I have tried the following by it seems a slot will not take a parameter unless it is emited by the accompanying signal. I was told briefly that QSignalMapper may be able to fit my needs but I am unsure. Any guidance would be appreciated! Thanks.

Connection:

QCheckBox* check_[8];
    	QDoubleSpinBox* grade_SpinBox_[8];
 
 
for (int i = 1; i <= 8; i++)
{
               connect(checkbox_[i], SIGNAL(toggled(bool)), this, SLOT(append_suffix(bool, [i])));	
}

QCheckBox* check_[8];
    	QDoubleSpinBox* grade_SpinBox_[8];


for (int i = 1; i <= 8; i++)
{
               connect(checkbox_[i], SIGNAL(toggled(bool)), this, SLOT(append_suffix(bool, [i])));	
}

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Slot:

void MainWindow::append_suffix(bool clicked, int checkboxnum)
{
		if (clicked == false)
		{
			grade_SpinBox_[checkboxnum]->setSuffix(QApplication::translate("MainWindow", "%", 0, QApplication::UnicodeUTF8));				
		}
		else
		{
			ass_grade_SpinBox_[checkboxnum]->setSuffix(QApplication::translate("MainWindow", "", 0, QApplication::UnicodeUTF8));		
		}
}

void MainWindow::append_suffix(bool clicked, int checkboxnum)
{
		if (clicked == false)
		{
			grade_SpinBox_[checkboxnum]->setSuffix(QApplication::translate("MainWindow", "%", 0, QApplication::UnicodeUTF8));				
		}
		else
		{
			ass_grade_SpinBox_[checkboxnum]->setSuffix(QApplication::translate("MainWindow", "", 0, QApplication::UnicodeUTF8));		
		}
}

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[jpn]

Yes, you could use QSignalMapper like this:

// QCheckBox* check_[8];
 
{
	QSignalMapper* mapper = new QSignalMapper(this);
	for (int i = 0; i < 8; ++i)
	{
		mapper->setMapping(check_[i], i);
		connect(check_[i], SIGNAL(toggled(bool)), mapper, SLOT(map()));
	}
	connect(mapper, SIGNAL(mapped(int)), this, SLOT(append_suffix(int)));
}
 
void append_suffix(int i)
{
	if (check_[i]->isChecked())
	{
		// ...
	}
	else
	{
		// ...
	}
}

// QCheckBox* check_[8];

{
	QSignalMapper* mapper = new QSignalMapper(this);
	for (int i = 0; i < 8; ++i)
	{
		mapper->setMapping(check_[i], i);
		connect(check_[i], SIGNAL(toggled(bool)), mapper, SLOT(map()));
	}
	connect(mapper, SIGNAL(mapped(int)), this, SLOT(append_suffix(int)));
}

void append_suffix(int i)
{
	if (check_[i]->isChecked())
	{
		// ...
	}
	else
	{
		// ...
	}
}

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[kramed]

Man, jpn, you are great. Two days in a row you have helped me greatly. TT should hire you to help with the documentation, your examples are much easier to follow. Thank you!