Hi again Maurizio.
First and foremost, thanks again for your input; I always appreciate it.
(I checked back in my mail archive, and I have responses from you
dating back to Feb 2019; you've been helping me for a long time. 😊)
Also thanks to Charles, who chimed in as well.
Apparently, the code I posted worked for Charles. He didn't add Exo to
the Windows system, but added it to the PyQt app with
QFontDatabase.addApplicationFont(). I tried it that way, but it still
behaved oddly for me. We are using the same Qt version (6.8.1). He
said he has Win10, while I have Win11. Not sure whether that would
matter.
I've been playing around with this for a few days now, trying to get my
head around it. The post you linked regarding the changes in 6.7 helped
with my understanding a lot. I think I get where QFontDatabase gets its
style names now. As Charles pointed out, when you request an italic
font style (as reported by QFontDatabase), you're getting a named style
from the variable font file, whereas if you use .setItalic(), you're
getting something else (Charles called it 'synthesized italic'). There
is even a comment in the Qt documentation for QFont.setStyleName() that
seems to explicitly discourage mixing the two:
https://doc.qt.io/qt-6/qfont.html#setStyleName
Due to the lower quality of artificially simulated styles, and the lack
of full cross platform support, it is not recommended to use matching by
style name together with matching by style properties
The setup I have is about as 'clean' as it can get. I got this laptop
just about a month ago, and it doesn't have a lot on it that didn't ship
with it. Exo is literally the only font I have installed beyond what
came with Win11.
I see the problem with other fonts as well -- Bahnschrift, for example,
which comes with Windows. If I create a QFont object with
QFontDatabase.font():
f = QFontDatabase.font('Bahnschrift', 'Condensed', 24)
and then apply .setItalic(True) to it, it's italic, but no longer
Condensed.
And actually, the same thing happens if I create the font with QFont()
directly:
f = QFont(
'Bahnschrift Condensed',
pointSize=24
)
Here also, the font is fine initially, but after .setItalic(True) it is
no longer Condensed.
The Bahnschrift file doesn't appear to have any italic styles defined,
so there's no way to ask for italic by style name.
Simulated/synthesized seems to be the only way to get italic Bahnschrift
Condensed. With the setup I have, it doesn't seem to be possible at
all. (The code above works as expected in PyQt5).
Anyway, probably a Qt issue, as you say, and one I'll just have to work
around ...
Thanks again!
/John
------ Original Message ------
>From "Maurizio Berti" <maurizio.berti at gmail.com>
To "John Sturtz" <john at sturtz.org>
Cc pyqt at riverbankcomputing.com
Date 1/5/2025 10:11:01 PM
Subject Re: QFontDatabase/QFont question
>First of all, this almost certainly is a Qt issue, not a PyQt one.
>Then, you have to consider at least the following aspects:
>>- font management and rendering is a quite complex aspect, and its
>results may change a lot depending on the platform;
>- fonts are not always consistent, depending on many aspects;
>- font matching follows arbitrary rules (some of which are based on
>text matching of families or properties);
>- the [infamous] 6.7 version introduced many changes and related
>bugs/inconsistencies, including font management, which got important
>changes (see this related post
><https://www.qt.io/blog/text-improvements-in-qt-6.7>);
>- if you have many fonts installed, the font matching algorithm may
>have issues especially if you installed different versions of the
>"same" font (start by checking how many fonts you've installed that
>match the "exo" family name); using installed fonts along with ones
>added through QFontDatabase may further complicate things;
>>My suggestion is to check again with a *clean* setup (possibly through
>multiple VMs, OSs and configurations) and eventually consider filing a
>detailed report on https://bugreports.qt.io.
>>Regards,
>MaurizioB
>>Il giorno lun 6 gen 2025 alle ore 00:09 John Sturtz <john at sturtz.org>
>ha scritto:
>>Hi again.
>>>>Wondering if anyone can help me understand this behavior that, to me,
>>is unexpected.
>>>>I'm using QFontDatabase to manipulate system fonts. Mostly it seems
>>to work great, and behaves as I expect. I especially like its handy
>>.font() method, that returns a QFont object.
>>>>But in this instance, it's behaving in a way I don't understand. I'm
>>working with a Google font named Exo
>>(https://fonts.google.com/specimen/Exo), which I've installed on my
>>system. QFontDatabase.styles('Exo') produces several (18, to be
>>exact) styles. Screenshot from Windows Font Settings below:
>>>>>>Now what I want to do is create a QFont object of the 'Bold' style,
>>and then just make it Italic. For example:
>>>>>font = QFontDatabase.font('Exo', 'Bold', 24)
>>>font.setItalic(True)
>>>>But after the .setItalic() call, the font object is no longer Bold
>>anymore (it's Thin, the lightest weight of the Exo fonts).
>>>>Sample code is attached (I guess one would have to install the Exo
>>font to test it). Basically, I get the font with
>>QFontDatabase.font(), get and display QFontInfo data for it, and it's
>>what I expect. Then I get the same font again, call .setItalic(True)
>>on it, display QFontInfo, and it's not what I expect:
>>>>>>I do (sort of) understand that the object returned by QFont is
>>requested, and QFontInfo tells you what you actually got. Apparently
>>I didn't get what I requested, but I'm not quite sure why.
>>>>As always, thanks in advance if you can shed any light on this!
>>>>/John
>>>--
>È difficile avere una convinzione precisa quando si parla delle ragioni
>del cuore. - "Sostiene Pereira", Antonio Tabucchi
>http://www.jidesk.net
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‘She has never mentioned her father to me. Was he—well, the sort of man whom the County Club would not have blackballed?’ "We walked by the side of our teams or behind the wagons, we slept on the ground at night, we did our own cooking, we washed our knives by sticking them into the ground rapidly a few times, and we washed our plates with sand and wisps of grass. When we stopped, we arranged our wagons in a circle, and thus formed a 'corral,' or yard, where we drove our oxen to yoke them up. And the corral was often very useful as a fort, or camp, for defending ourselves against the Indians. Do you see that little hollow down there?" he asked, pointing to a depression in the ground a short distance to the right of the train. "Well, in that hollow our wagon-train was kept three days and nights by the Indians. Three days and nights they stayed around, and made several attacks. Two of our men were killed and three were wounded by their arrows, and others had narrow escapes. One arrow hit me on the throat, but I was saved by the knot of my neckerchief, and the point only tore the skin a little. Since that time I have always had a fondness for large neckties. I don't know how many of the Indians we killed, as they carried off their dead and wounded, to save them from being scalped. Next to getting the scalps of their enemies, the most important thing with the Indians is to save their own. We had several fights during our journey, but that one was the worst. Once a little party of us were surrounded in a small 'wallow,' and had a tough time to defend ourselves successfully. Luckily for us, the Indians had no fire-arms then, and their bows and arrows were no match for our rifles. Nowadays they are well armed, but there are[Pg 41] not so many of them, and they are not inclined to trouble the railway trains. They used to do a great deal of mischief in the old times, and many a poor fellow has been killed by them." As dusk came on nearly the whole population of Maastricht, with all their temporary guests, formed an endless procession and went to invoke God's mercy by the Virgin Mary's intercession. They went to Our Lady's Church, in which stands the miraculous statue of Sancta Maria Stella Maris. The procession filled all the principal streets and squares of the town. I took my stand at the corner of the Vrijthof, where all marched past me, men, women, and children, all praying aloud, with loud voices beseeching: "Our Lady, Star of the Sea, pray for us ... pray for us ... pray for us ...!" It had not occurred to her for some hours after Mrs. Campbell had told her of Landor's death that she was free now to give herself to Cairness. She had gasped, indeed, when she did remember it, and had put the thought away, angrily and self-reproachfully. But it returned now, and she felt that she might cling to it. She had been grateful, and she had been faithful, too.[Pg 286] She remembered only that Landor had been kind to her, and forgot that for the last two years she had borne with much harsh coldness, and with a sort of contempt which she felt in her unanalyzing mind to have been entirely unmerited. Gradually she raised herself until she sat quite erect by the side of the mound, the old exultation of her half-wild girlhood shining in her face as she planned the future, which only a few minutes before had seemed so hopeless. After he had gloated over Sergeant Ramsey, Shorty got his men into the road ready to start. Si placed himself in front of the squad and deliberately loaded his musket in their sight. Shorty took his place in the rear, and gave out: The groups about each gun thinned out, as the shrieking fragments of shell mowed down man after man, but the rapidity of the fire did not slacken in the least. One of the Lieutenants turned and motioned with his saber to the riders seated on their horses in the line of limbers under the cover of the slope. One rider sprang from each team and ran up to take the place of men who had fallen. "As long as there's men and women in the world, the men 'ull be top and the women bottom." Then, in the house, the little girls were useful. Mrs. Backfield was not so energetic as she used to be. She had never been a robust woman, and though her husband's care had kept her well and strong, her frame was not equal to Reuben's demands; after fourteen years' hard labour, she suffered from rheumatism, which though seldom acute, was inclined to make her stiff and slow. It was here that Caro and Tilly came in, and Reuben began to appreciate his girls. After all, girls were needed in a house—and as for young men and marriage, their father could easily see that such follies did not spoil their usefulness or take them from him. Caro and Tilly helped their grandmother in all sorts of ways—they dusted, they watched pots, they shelled peas and peeled potatoes, they darned house-linen, they could even make a bed between them. HoME一级毛片视频免费公开
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