Bug 311288

My system is Slackware 14.0 using KDE 4.8.4 (32bit). 
Recently I get the KIMToy source code (Version 1.9.2) from http://kde-apps.org/content/show.php?content=140967, then compile it with these parameters:
cmake -DCMAKE_C_FLAGS:STRING="-O2 -march=i486 -mtune=i686" \
        -DCMAKE_CXX_FLAGS:STRING=="-O2 -march=i486 -mtune=i686" \
        -DCMAKE_INSTALL_PREFIX=/usr \
        -DSYSCONF_INSTALL_DIR=/etc/kde \
        -DLIB_INSTALL_DIR=/usr/lib \
        ..
KIMToy runs well
Then I downloaded some themes from sougou, but I could not get any preview in KIMToy's configure window after I import them.

Reproducible: Always

Steps to Reproduce:
1. download some sougou input method skin files, for example theme.ssf
2. Run KIMToy, click "configure KIMToy"
3. select "Themes" option bar
4. click "install..." and select the theme.ssf, then press confirm
Actual Results:  
In theme preview window, I just get a blank line instead of the preview of the installed new theme.

Expected Results:  
Normally I should see the preview of the installed new theme.