Chinese font issue with Qt 4.8.4 under CE 6

-vix-

I installed Simplified Chinese on Win CE6 successfully.
I can properly see Chinese text inside a txt document on Win CE 6.

I developed a test application in Qt where I use Roboto Condensed font for latin symbols. As far as I know, this font doesn't contain Chinese symbols (but I can be wrong).

When I build my application for desktop, Chinese symbols are displayed properly; maybe some kind of "font substitution" (font fallback) or another Qt mechanism takes place.

When I build my application for Win CE 6, Chinese symbols are shown as squares.

From Qt documentation, the following code

QFontDatabase fontDB;
fontDB.writingSystems();

returns a sorted list of the available writing systems. This is list generated from information about all installed fonts on the system.

On my Win7 desktop QFontDatabase::SimplifiedChinese appears in the list.

On Win CE6 it doesn't appear even if I installed Simplified Chinese.

As a consequence,

even if fontDB.families() returns a list containing SimSun both on my desktop and on Win CE6
fontDB.families(QFontDatabase::SimplifiedChinese) returns SimSun on my desktop and an empty list on Win CE6

I searched inside Qt resources and I found topics on issues similar to this one: I found some suggestions, but none of them works for me.

SGaist

Hi,

What did you try ?
What result did you get ?
Did you consider updating your Qt version to the latest version of available of the 4 series (4.8.7) ?

-vix-

Hi,

I installed SimSun font on Win CE 6 and I can see Chinese symbols inside a txt document on Win CE 6.
I installed my Qt application, but Chinese symbols are shown as empty squares. If I compile the same application for Desktop target, Chinese fonts are shown properly.
This is why I investigated QFontDatabas.

I've been investigating if I can update Qt to 4.8.7.
Iìm not sure if this requires an update to SDK for the specific target too.

SGaist

Did you add the font to QFontDatabase ?

-vix-

No I didn't, because fontDB.families() returns a list containing SimSun font both on my desktop and on Win CE6.
Is it necessary adding it explictly to QFontDatabase?

-vix-

I was able to fix the issue.
It was necessary to configure Font Linking for Roboto Condensed font as described here.

On Desktop this configuration is not necessary.

SGaist

Glad you found out and thanks for sharing !

Since you have it working now, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)