QwtPlot line thickness

[maluedo]

I've to print two curve one with a pen with size 1 and another with size 4.

The preview it's good, but when printing the thickness of the two curve it's the same (very thin).

I've read a previous thread about this, but sincerely I haven't understand the real problem and how to solve it.

Please help

[Uwe]

QPen::setCosmetic(),

Uwe

[maluedo]

Hi Uwe, thanks for your reply,
I'm trying to apply your suggestion.

This is the code that I use in my QwtPlot class,
when I print on my printer I get ever thin lines.

QPen pen_2 = QPen(Qt::red, 4.0);
	pen_2.setCosmetic(false);
	d_crv2->setPen(pen_2);
	d_crv2->setYAxis(QwtPlot::yLeft);
 
	d_crv2->attach(this);

QPen pen_2 = QPen(Qt::red, 4.0);
	pen_2.setCosmetic(false);
	d_crv2->setPen(pen_2);
	d_crv2->setYAxis(QwtPlot::yLeft);
	
	d_crv2->attach(this);

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Thanks
maluedo

P.S.
the printpreview it's good, but when I print on the printer I get thin lines!

[Uwe]

I'm not sure what you mean by "preview", but I checked the bode example in combination with PDF, Postscript and SVG. In all cases the curve line was scaled according to the resolution of the paint device - looking like on screen.

I also checked Qwt from trunk, that doesn't need to scale manually anymore ( because of using a double based render engine ). The output of the bode example of this version looks ok too.

Try to print a PDF document first and check the lines in a PDF viewer. If they are ok print the PDF document to your printer. Are your lines better then ?

Uwe

[maluedo]

Dear Uwe,
I miss to said that I was building with qwt 5.2, I got the trunk revision and all it's working
fine.

Thanks for your patience
maluedo