wrong characters are shown instead of dots in password QLineEdit

Paul Busovikov

I set echoMode as password and expect dots like that

but I got this

to be clear I build it in sandbox debian7 with its own QT 4.8 and launch in mint 17
when I build it in Mint with QT 4.9, all looks fine

maibe something relaited with native xcb?

sierdzio

Qt 4.9? There is no such version.

Weird issue, I'd suspect maybe something to do with fonts? Have you tried with some newer Qt version (5.6 or 5.9) if the problem persists?

Paul Busovikov

I'm sorry 5.8 and 5.9 of course =)

and I forgot to mention that the characters which are returned by displayText() are '\u25cf'
so it is dot, but why does it look so strange

sierdzio

Then it points even stronger to some issue with fonts - the default one seemingly lacks the dot character.

Do other texts in the application look different in both app builds?

J.Hilk

@Paul-Busovikov a wild guess based a recent experience:
Remove the italic from the font.

Paul Busovikov

@sierdzio no, texts in both app look identically
I checked the font and the dot character there is

@J-Hilk doesn't help unfortunately

Paul Busovikov

Also it isn't matter what font I choose.
I took "Ubuntu" font and there were rectangles which look as undefined characters looks like
U+25cf is displayed like that, everywhere ( label lineEdit etc. ) during I build my project in sandbox

sierdzio

Weird! Sorry, but I ran out of ideas how to help here :-(

I've looked through known Qt bugs, the only one remotely related is https://bugreports.qt.io/browse/QTBUG-23626?jql=text ~ "echoMode" but I don't think that's it.

jsulm

@Paul-Busovikov Are you changing anything related to fonts and style in your app? For example style-sheets?

Paul Busovikov

@jsulm yes, I have style-sheet for those widgets, but I've tried same sheets for the build where I have no problem

that is the one of them, can it spoil something?

.QLineEdit
{
    min-height: 32px;
    qtproperty-hsizetype="Maximum";
    border-radius: 2px;
    border-style: solid;
    border-width: 1px;
    border-color: rgb(0,0,0,25%);
    margin-top: 4px;
    margin-bottom: 4px;
}

.QLineEdit::focus
{
    border-color: rgb(0,147,196, 85%);
}

.QLineEdit:hover
{
    border-color: rgb(0,0,0,40%);
}

.QLineEdit:disabled
{
    border-color: rgb(0,0,0,25%);
    background-color: rgb(255,255,255, 50%);
    color: rgb(0,0,0, 50%);
}

jsulm

@Paul-Busovikov I would try without this style-sheet to be sure

Paul Busovikov

@jsulm I've tried without style-sheets, the problem still here

jsulm

@Paul-Busovikov When you start your app do you see any warnings/errors? You build your app on Debian but execute on Mint: did you deploy it (http://doc.qt.io/qt-5/linux-deployment.html)? Could be that it doesn't find the font and falls back to some other font.

Paul Busovikov

@jsulm it does find the font, I saw the differences and features of particular fonts
I deploy it by coping qt libraries (which were used during the compilation in sandbox) and their dependencies and qtplugins and fonts into a path available for app
During the work there are no warnings or errors

Can it be some codec problem? I suppose it is UTF-8 in both cases. How can I check it?
Just printed 10000 characters to see how it looks like

QString s;
for ( int i = 1; i < 10000; ++i )
{
     s.append( QChar(i) );
}
ui->textEdit->setText(s);

There are 2 variants

jsulm

@Paul-Busovikov In the second output you can see that much less characters can be properly shown. To me it really looks like a font issue. Internally QString uses UTF-16.

Paul Busovikov

@jsulm you are right

QFontDatabase().families().join(" | ")

gave me some clue
The first app returned whole list of families and the second one returned the only one which I deployed

QFontDatabase::addApplicationFont( "fontDir/myFont.ttf" );

but I don't understand where both apps are looking for fonts
how can I force the app to look for in /usr/local/fonts not only in my deployed font directory?

Paul Busovikov

And for what reason qt would not use fontconfig ?

Paul Busovikov

I don't figure out why fontconfig don't work
But I have solved this particular issue by adding path to free fonts in QT_QPA_FONTDIR

jsulm

@Paul-Busovikov said in wrong characters are shown instead of dots in password QLineEdit:

And for what reason qt would not use fontconfig ?

For example because it was built without fontconfig support. Did you build Qt by yourself?

Paul Busovikov

@jsulm Thanks for answer. No, I didn't, but I have a log of building

So, as far as I understood it is the reason

[18:57:36] :	 [Step 2/2]      [exec] Qt Gui:
[18:57:36] :	 [Step 2/2]      [exec]   FreeType ............................... yes
[18:57:36] :	 [Step 2/2]      [exec]     Using system FreeType ................ no
[18:57:36] :	 [Step 2/2]      [exec]   HarfBuzz ............................... yes
[18:57:36] :	 [Step 2/2]      [exec]     Using system HarfBuzz ................ no
[18:57:36] :	 [Step 2/2]      [exec]   Fontconfig ............................. no
[18:57:36] :	 [Step 2/2]      [exec]   Image formats:
[18:57:36] :	 [Step 2/2]      [exec]     GIF .................................. yes
[18:57:36] :	 [Step 2/2]      [exec]     ICO .................................. yes
[18:57:36] :	 [Step 2/2]      [exec]     JPEG ................................. yes
[18:57:36] :	 [Step 2/2]      [exec]       Using system libjpeg ............... no
[18:57:36] :	 [Step 2/2]      [exec]     PNG .................................. yes
[18:57:36] :	 [Step 2/2]      [exec]       Using system libpng ................ no

Also for the people who got similar issue there is the way to change password character by style-sheet

lineedit-password-character: 42;