Ubuntu之下如何开启壁纸自动切换

1. 选择一个图片文件夹，将需要用到的壁纸放在该文件下

2. 在该文件夹下运行如下脚本：

   #!/usr/bin/env python
   # -*- coding: utf-8 -*-
   # Name: slidexml.py
   # Author: EthanZ6174
   # Email: <[e-mail]>
   # Site: http://www.noslog.com
   # Licence: GPLv3
   # Version: 091127
   
   import glob, os
   import shutil
   import time
   
   
   curdir = os.getcwd()
   os.chdir(curdir)
   currentFilelist = glob.glob('*.*')
   currentImageFiles = glob.glob('*.jpg')
   
   currentTime = time.localtime()
   length = len(currentImageFiles)
   
   for i in currentFilelist:
    if i == 'backgroundslide.xml':
     os.remove(i)
   
   f = file('backgroundslide.xml', 'w')
   
   f.write('<background>\n')
   f.write('\t<starttime>\n')
   f.write('\t\t<year>' + str(currentTime.tm_year) + '</year>\n')
   f.write('\t\t<month>' + str(currentTime.tm_mon) + '</month>\n')
   f.write('\t\t<day>' + str(currentTime.tm_mday) + '</day>\n')
   f.write('\t\t<hour>' + str(currentTime.tm_hour) + '</hour>\n')
   f.write('\t\t<minute>' + str(currentTime.tm_min) + '</minute>\n')
   f.write('\t\t<second>' + str(currentTime.tm_sec) + '</second>\n')
   f.write('\t</starttime>\n')
   f.write('<!--This animation will start at the time it created-->\n')
   
   for i in currentImageFiles:
    length = length - 1
    print length
    #print curdir
    #print currentImageFiles[1]
    f.write('\t<static>\n')
    f.write('\t\t<duration>595.0</duration>\n')
    f.write('\t\t<file>' + curdir + '/' + currentImageFiles[length] +'</file>\n')
    f.write('\t</static>\n')
    f.write('\t<transition>\n')
    f.write('\t\t<duration>5.0</duration>\n')
    f.write('\t\t<from>' + curdir + '/' + currentImageFiles[length] + '</from>\n')
    if length >= 1:
     f.write('\t\t<to>' + curdir + '/' + currentImageFiles[length-1] + '</to>\n')
    if length <1:
     f.write('\t\t<to>' + curdir + '/' + currentImageFiles[len(currentImageFiles)-1] + '</to>\n')
    f.write('\t</transition>\n')
   
   f.write('</background>\n')
   f.close()

    3. 将生成的background.xml加入桌面背景选择中

附录：

<background> 
  <starttime>   <!-- starttime标签设置动画（幻灯片）开始的时间，可根据自己制作的时间设定，这个应该不影响实际要实现的功能 -->
    <year>2009</year> 
    <month>08</month> 
    <day>04</day> 
    <hour>00</hour> 
    <minute>00</minute> 
    <second>00</second> 
  </starttime> 
<!-- This animation will start at midnight. -->   <!-- "animation"动画的意思 -->
  <static>  <!-- "static"静态的意思 -->
    <duration>1800.0</duration>  <!-- duration标签设置持续的时间，以秒为单位。--> 
    <file>/usr/share/backgrounds/cosmos/cloud.jpg</file> <!-- file标签指定壁纸存放的路径 -->
  </static> 
  <transition> <!--"transition"切换的意思 -->
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/cloud.jpg</from><!--from ... to从壁纸A切换到壁纸B。--> 
    <to>/usr/share/backgrounds/cosmos/comet.jpg</to> 
  </transition> 
  <static> 
    <duration>1800.0</duration> 
    <file>/usr/share/backgrounds/cosmos/comet.jpg</file> 
  </static> 
  <transition> 
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/comet.jpg</from> 
    <to>/usr/share/backgrounds/cosmos/earth-horizon.jpg</to> 
  </transition> 
  <static> 
    <duration>1800.0</duration> 
    <file>/usr/share/backgrounds/cosmos/earth-horizon.jpg</file> 
  </static> 
  <transition> 
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/earth-horizon.jpg</from> 
    <to>/usr/share/backgrounds/cosmos/blue-marble-west.jpg</to> 
  </transition> 
  <static> 
    <duration>1800.0</duration> 
    <file>/usr/share/backgrounds/cosmos/blue-marble-west.jpg</file> 
  </static> 
  <transition> 
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/blue-marble-west.jpg</from> 
    <to>/usr/share/backgrounds/cosmos/galaxy-ngc3370.jpg</to> 
  </transition> 
  <static> 
    <duration>1800.0</duration> 
    <file>/usr/share/backgrounds/cosmos/galaxy-ngc3370.jpg</file> 
  </static> 
  <transition> 
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/galaxy-ngc3370.jpg</from> 
    <to>/usr/share/backgrounds/cosmos/helix-nebula.jpg</to> 
  </transition> 
  <static> 
    <duration>1800.0</duration> 
    <file>/usr/share/backgrounds/cosmos/helix-nebula.jpg</file> 
  </static> 
  <transition> 
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/helix-nebula.jpg</from> 
    <to>/usr/share/backgrounds/cosmos/jupiter.jpg</to> 
  </transition> 
  <static> 
    <duration>1800.0</duration> 
    <file>/usr/share/backgrounds/cosmos/jupiter.jpg</file> 
  </static> 
  <transition> 
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/jupiter.jpg</from> 
    <to>/usr/share/backgrounds/cosmos/sombrero.jpg</to> 
  </transition> 
  <static> 
    <duration>1800.0</duration> 
    <file>/usr/share/backgrounds/cosmos/sombrero.jpg</file> 
  </static> 
  <transition> 
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/sombrero.jpg</from> 
    <to>/usr/share/backgrounds/cosmos/whirlpool.jpg</to> 
  </transition> 
  <static> 
    <duration>1800.0</duration> 
    <file>/usr/share/backgrounds/cosmos/whirlpool.jpg</file> 
  </static> 
  <transition> 
    <duration>5.0</duration> 
    <from>/usr/share/backgrounds/cosmos/whirlpool.jpg</from> 
    <to>/usr/share/backgrounds/cosmos/cloud.jpg</to> 
  </transition> 
</background>