Re: Qt/WinFree bugs

Angus Leeming wrote:
> Michael Schmitt wrote:
> 
>> Dear Christian and all Qt developers,
>>
>> I would like to tell you that the LyX team has released a series of 
>> pre-releases for LyX 1.3.6 on Windows.
>>
>> You can find the latest version at
>>
>>  http://wiki.lyx.org/Windows/LyX136pre
>>
>> The LyX community has also generated a short list of Qt/WinFree bugs 
>> which you can find on the same page.
>
> Section "Apparent Qt/WinFree bugs" at the bottom of the page.
> I've attached two tiny programs that demonstrate two of the bugs. Maybe 
> they'll help...

I think that the attached program demonstrates two bugs. One, definitely, 
in Qt/WinFree and one, possibly, in LyX.

The problem lies with the QFont style hint (which isn't useful on *nix 
because the OS doesn't support it). On my WinXP box, the compiled program 
returns:

     Serif: Arial [MS]
     SansSerif: Arial [MS]
     TypeWriter: Arial [MS]

I think that the Qt/WinFree bug is clear; different style hints should 
return different fonts.

The LyX bug, if bug it is, is a little more subtle. Other Qt libraries (eg 
Qt Non-Commercial 3.2.1) apparently return the font name without the 
foundary on QFontInfo::family(). Ie, "Arial" rather than "Arial [MS]".

It's trivial for me to handle this difference but I'd like to establish 
what Qt/WinFree *should* be returning here. The docs don't make it clear, 
to me at least.

Regards,
Angus

#include <qapplication.h>
#include <qpushbutton.h>

#include <cstdlib>
#include <iostream>
#include <sstream>
#include <string>

using std::string;

template <class Target, class Source>
Target convert(Source arg);


template<>
int convert<int>(char * cptr)
{
	return strtol(cptr, 0, 10);
}


int usage(string const & name)
{
	std::cerr << "Usage: " << name
		  << " [1-3]\nwhere 1==times,2==helvetica,3==courier\n";
	return 1;
}

int main( int argc, char **argv )
{
	if (argc != 2)
		return usage(argv[0]);

	int const choice = convert<int>(argv[1]);
	QFont::StyleHint font_hint = QFont::Serif;
	string font_name = "Serif";
	switch (choice) {
	case 1:
		font_hint = QFont::Serif;
		font_name = "Serif";
		break;
	case 2:
		font_hint = QFont::SansSerif;
		font_name = "SansSerif";
		break;
	case 3:
		font_hint = QFont::TypeWriter;
		font_name = "TypeWriter";
		break;
	default:
		return usage(argv[0]);
	}

	QApplication a( argc, argv );

	// Try the hint
	QFont font;
	font.setStyleHint(font_hint);
	QFontInfo fi(font);

	std::ostringstream ss;
	ss << font_name << " = " << fi.family();

	QPushButton hello( ss.str(), 0 );
	hello.resize( 200, 30 );

	a.setMainWidget( &hello );
	hello.show();
	return a.exec();
}