[Thunar-dev] Something weird with thumbnailers (transparency and no drop shadow)

Erlend Davidson E.R.M.Davidson at sms.ed.ac.uk
Tue Aug 14 19:56:46 CEST 2007

That fixed it - thanks!

I've been pondering with the idea of introducing a thumbnail for folders 
which contain >= 60% images.  I don't yet know if thunar supports this, 
but first I should probably ask people what they think?  I think it 
might make viewing photograph albums easier.

Also, my flatmate has recently started using thunar/thunar-thumbnailers, 
and while he likes the thumbnails he mentioned that they make it more 
difficult to tell the type of the file.  For example he might have .tex 
.pdf and .dvi files all in the same directory... given that the latter 
two are generated from the .tex, and all three have the same thumbnail 
it is impossible to tell which is the pdf file without looking at the 
file extension.  It can be quite frustrating when you click the wrong 
one and have to wait for eclipse to finish loading.

Would it be possible to have the original file icon in the bottom right 
hand corner of the thumbnail?

Stefan Stuhr wrote:
> On Tue, 2007-08-14 at 15:53 +0100, Erlend Davidson wrote:
>> I've written a thumbnailer for OpenDocument files (which doesn't need 
>> libgsf), but I notice thunar isn't putting the nice border shadow around 
>> the icons thumbnailed using this.  Furthermore, if I go into 
>> ~/.thumbnails/normal and find the actual thumbnail image it has 
>> transparent parts!  The background colour (white) has been made 
>> transparent somehow.
>> My thumbnailer isn't doing it AFAIK, it simply does:
>> unzip -p "$ifile" Thumbnails/thumbnail.png | convert - -scale 
>> "$sizex$size" "png:$ofile"
>> and the original thumbnail.png files in the ODF are not transparent.
> I have just looked in an ODF document on my computer, and the
> Thumbnails/thumbnail.png file (in my document file, at least) definitely
> have a transparent background.
> Try this:
> unzip -p "$ifile" Thumbnails/thumbnail.png | convert - +matte -scale "$sizex$size" "png:$ofile"
> >From the ImageMagick documentation[1]:
> -matte
>         store matte channel if the image has one.
>         If the image does not have a matte channel, create an opaque
>         one.
>         Use +matte to ignore the matte channel and to avoid writing a
>         matte channel in the output file.
> [1]: http://www.imagemagick.org/script/command-line-options.php#matte
>>   My 
>> guess is that the transparency is somehow killing the border.
>> Erlend
> Stefan
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