printing: use sensible font-size in profiles

The font-size in printed profiles is based on the size of the profile
in the main window. This makes no sense. Why should changing the
window size change the font-size on printouts?

Matter of fact, when making shrinking the height of the window to
its minimum, comical printouts are obtained (font way too big).

Therefore use an arbitrary rule: Say that profiles 600 pixels high
look reasonable and then scale up to the actual size on the printout.

This may need some tweaking for high-DPI mode. But that seems not
to be supported on desktop anyway?

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

1 files changed, 6 insertions, 2 deletions

diff --git a/desktop-widgets/printer.cpp b/desktop-widgets/printer.cpp
index ff5a65b93..49135d79c 100644
--- a/desktop-widgets/printer.cpp
+++ b/desktop-widgets/printer.cpp
@@ -150,8 +150,12 @@ void Printer::render(int pages)
 
 	QSize originalSize = profile->size();
 	if (collection.count() > 0) {
-		printFontScale = (double)collection.at(0).geometry().size().height() / (double)profile->size().height();
-		profile->resize(collection.at(0).geometry().size());
+		// A "standard" profile has about 600 pixels in height.
+		// Scale the fonts in the printed profile accordingly.
+		// This is arbitrary, but it seems to work reasonably.
+		QSize size = collection[0].geometry().size();
+		printFontScale = size.height() / 600.0;
+		profile->resize(size);
 	}
 	profile->setFontPrintScale(printFontScale);