Building heavily on an original post by Minio and the many follow-ups explaining how to do this for OpenOffice:
Since Xmind (mind mapping software) is using a file format similar to that of OpenOffice, I adapted those scripts to also create thumbnails for my Xmind mind maps. It takes a little more effort to set up, because there is no mime type for Xmind files yet.
1. Set up a mime type for Xmind files
Xmind files are reported as application/zip, so we need to add our own mime type:
sudo gedit /usr/share/mime/packages/x-xmind.xmlI just hacked something together quickly, to let the system report files with extension ".xmind" as mime type application/x-xmind:
<?xml version="1.0" encoding="UTF-8"?>
<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
<mime-type type="application/x-xmind">
<comment>Xmind mindmap</comment>
<glob pattern="*.xmind"/>
</mime-type>
</mime-info>After you save this file, update the mime type database:
sudo update-mime-database /usr/share/mime2. Set up the script to make thumbnails of Xmind files
sudo gedit /usr/bin/xmind-thumbnailerAdd the following script, and make sure to check the ICON_PATH variable, to make sure that icon exists there.
The thumbnailer is slightly different from the OpenOffice one: Xmind stores its thumbnail as a JPEG file with big dimensions (my test file had a 2091x973 pixels image). To make the thumbnail more icon-like, I've arbitrarily selected 200px in either direction as the maximum. (The application icon is 36x37 pixels, and should be recognizable in the thumbnail.)
#!/usr/bin/env python
import gnomevfs
import os
import sys
import zipfile
from PIL import Image, ImageEnhance
# Alter these varibles to change thumbnail look
ICON_PATH = "/usr/local/xmind/xmind-logo-36.png" # Change this path to alter icons
ICON_OPACITY = 0.6 #Opacity of the icon (between 0.0 and 1.0)
THUMBNAIL_BACKGROUND_COLOR = "white" # Color of the background
in_file_path = gnomevfs.get_local_path_from_uri(sys.argv[1])
out_file_path = sys.argv[2]
path_without_thumbs = os.getenv("HOME")+"/Templates"
def get_icon(thumbnail_size):
#Load icon
icon = Image.open(ICON_PATH).convert("RGBA")
#Set it's opacity
icon = set_icon_opacity(icon,ICON_OPACITY)
#And set it's position in thumbnail
icon_posx=thumbnail_size[0]-icon.size[0]
icon_posy=thumbnail_size[1]-icon.size[1]
icon_width=thumbnail_size[0]
icon_height=thumbnail_size[1]
return {"image":icon,"position":(icon_posx,icon_posy,icon_width,icon_height)}
def get_basic_thumbnail():
#Find out if the file is not in Templates directory
if in_file_path.find(path_without_thumbs)!=0:
try:
#Extract thumbnail from Xmind file and save it
zip=zipfile.ZipFile(in_file_path,mode="r")
picture=zip.read("Thumbnails/thumbnail.jpg")
zip.close()
thumbnail=open(out_file_path,"w")
thumbnail.write(picture)
thumbnail.write("/n")
thumbnail.close()
#Open saved thumbnail
image=Image.open(out_file_path).convert("RGBA")
if image.size[0]>200:
image = image.resize((200,image.size[1]*200/image.size[0]))
if image.size[1]>200:
image = image.resize((image.size[0]*200/image.size[1],200))
return {"suceeded":True,"image":image,"size":(image.size[0],image.size[1])}
except:
return {"suceeded":False}
else:
return {"suceeded":False}
# Nicked from http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362879
def set_icon_opacity(icon,opacity):
#Returns an image with reduced opacity.
assert opacity >= 0 and opacity <= 1
if icon.mode != 'RGBA':
icon = icon.convert('RGBA')
else:
icon = icon.copy()
alpha = icon.split()[3]
alpha = ImageEnhance.Brightness(alpha).enhance(opacity)
icon.putalpha(alpha)
return icon
thumbnail=get_basic_thumbnail()
if thumbnail["suceeded"]:
background=Image.new("RGB", thumbnail["size"], THUMBNAIL_BACKGROUND_COLOR)
icon=get_icon(thumbnail["size"])
thumbnail=thumbnail["image"]
# Add thumbnail
background.paste(thumbnail, None, thumbnail)
# Add icon
background.paste(icon["image"],icon["position"],icon["image"])
# Save thumbnail
background.save(out_file_path,"PNG")Make the script executable:
sudo chmod +x /usr/bin/xmind-thumbnailer3. Tie the mime type and thumbnailer together
Create the schema file that defines how things fit together, by adding this schema file:
sudo gedit /usr/share/gconf/schemas/xmind.schemasPaste in the following code:
<gconfschemafile>
<schemalist>
<schema>
<key>/schemas/desktop/gnome/thumbnailers/application@x-xmind/enable</key>
<applyto>/desktop/gnome/thumbnailers/application@x-xmind/enable</applyto>
<owner>xmind-thumb</owner>
<type>bool</type>
<default>true</default>
<locale name="C">
<short></short>
<long></long>
</locale>
</schema>
<schema>
<key>/schemas/desktop/gnome/thumbnailers/application@x-xmind/command</key>
<applyto>/desktop/gnome/thumbnailers/application@x-xmind/command</applyto>
<owner>xmind-thumb</owner>
<type>string</type>
<default>/usr/bin/xmind-thumbnailer %u %o</default>
<locale name="C">
<short></short>
<long></long>
</locale>
</schema>
</schemalist>
</gconfschemafile>4. Activate!
Activating this new thumbnailer can be done by rebooting, or by installing the schema and restarting Nautilus:
gconftool-2 --install-schema-file /usr/share/gconf/schemas/xmind.schemas
sudo killall -9 nautilusNote: you run gconftool-2 as "yourself", to get it installed in the right place: your home environment.
THANKS! Minio for starting the OpenOffice thread and supporting it! And everyone else over there for adding their findings! :-)