Using template in constructors

[estanisgeyer]

Hi friends,

I have a class that must pass as a parameter in the constructor pointer to a class that inherits from any QWidget. I'm trying to use the concept of templates for this, but I'm having difficulties. When compiling, I have the following error:

undefined reference to `Report: Report (QWidget *, NFePrint *)

The following snippet of code in classes involved:

class Report: public QMainWindow
{
	Q_OBJECT
	public:
		template <typename Tx>
		Report(QWidget *parent = 0, Tx *widgetPrint = 0);
                .....
}
 
template <typename Tx>
Report::Report(QWidget *parent, Tx *widgetPrint)
	:QMainWindow(parent), currentZoom(100)
{
	ui.setupUi(this);
       .......
}
 
void MainWindow::showReport()
{
	NFePrint *nfePrint = new NFePrint;
	Report *r = new Report(this, nfePrint);
	r->show();
}

class Report: public QMainWindow
{
	Q_OBJECT
	public:
		template <typename Tx>
		Report(QWidget *parent = 0, Tx *widgetPrint = 0);
                .....
}

template <typename Tx>
Report::Report(QWidget *parent, Tx *widgetPrint)
	:QMainWindow(parent), currentZoom(100)
{
	ui.setupUi(this);
       .......
}

void MainWindow::showReport()
{
	NFePrint *nfePrint = new NFePrint;
	Report *r = new Report(this, nfePrint);
	r->show();
}

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Thanks,

Marcelo E. Geyer

[lyuts]

Why not use a template class Report?

[estanisgeyer]

Because I have other classes that I pass as a parameter in the constructor

[wysota]

You can't have templates in classes containing Q_OBJECT macros.

[estanisgeyer]

OK, thanks for information.
I'm was resolving problem writing the class for reuse the code.
Thanks,

Marcelo E. Geyer.