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Dynamically change your gnome desktop wallpaper - Alexis Métaireau </title>
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<h1 class="post-title">Dynamically change your gnome desktop wallpaper</h1>
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<time datetime="2010-10-11T00:00:00+02:00">11 octobre 2010</time>
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<p>In gnome, you can can use a <span class="caps">XML</span> file to have a dynamic wallpaper. It’s
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not so easy, and you can’t just tell: use the pictures in this folder to
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do so.</p>
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<p>You can have a look to the git repository if you want:
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<a href="http://github.com/ametaireau/gnome-background-generator">http://github.com/ametaireau/gnome-background-generator</a></p>
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<p>Some time ago, I’ve made a little python script to ease that, and you
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can now use it too. It’s named “gnome-background-generator”, and you can
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install it via pip for instance.</p>
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<div class="highlight"><pre><span></span><code>shell
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$ pip install gnome-background-generator
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</code></pre></div>
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<p>Then, you have just to use it this way:</p>
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<div class="highlight"><pre><span></span><code><span class="n">shell</span>
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<span class="n">$ gnome-background-generator -p ~/Images/walls -s</span>
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<span class="n">/home/alexis/Images/walls/dynamic-wallpaper.xml generated</span>
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</code></pre></div>
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<p>Here is a extract of the `—help`:</p>
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<div class="highlight"><pre><span></span><code><span class="n">shell</span>
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<span class="o">$</span><span class="w"> </span><span class="n">gnome</span><span class="o">-</span><span class="n">background</span><span class="o">-</span><span class="n">generator</span><span class="w"> </span><span class="o">--</span><span class="n">help</span>
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<span class="n">usage</span><span class="p">:</span><span class="w"> </span><span class="n">gnome</span><span class="o">-</span><span class="n">background</span><span class="o">-</span><span class="n">generator</span><span class="w"> </span><span class="p">[</span><span class="o">-</span><span class="n">h</span><span class="p">]</span><span class="w"> </span><span class="p">[</span><span class="o">-</span><span class="n">p</span><span class="w"> </span><span class="n">PATH</span><span class="p">]</span><span class="w"> </span><span class="p">[</span><span class="o">-</span><span class="n">o</span><span class="w"> </span><span class="n">OUTPUT</span><span class="p">]</span>
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<span class="w"> </span><span class="p">[</span><span class="o">-</span><span class="n">t</span><span class="w"> </span><span class="n">TRANSITION_TIME</span><span class="p">]</span><span class="w"> </span><span class="p">[</span><span class="o">-</span><span class="n">d</span><span class="w"> </span><span class="n">DISPLAY_TIME</span><span class="p">]</span><span class="w"> </span><span class="p">[</span><span class="o">-</span><span class="n">s</span><span class="p">]</span>
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<span class="w"> </span><span class="p">[</span><span class="o">-</span><span class="n">b</span><span class="p">]</span>
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<span class="n">A</span><span class="w"> </span><span class="n">simple</span><span class="w"> </span><span class="n">command</span><span class="w"> </span><span class="n">line</span><span class="w"> </span><span class="k">tool</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">generate</span><span class="w"> </span><span class="n">an</span><span class="w"> </span><span class="n">XML</span><span class="w"> </span><span class="n">file</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">use</span><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">gnome</span>
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<span class="n">wallpapers</span><span class="p">,</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">have</span><span class="w"> </span><span class="n">dynamic</span><span class="w"> </span><span class="n">walls</span>
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<span class="n">optional</span><span class="w"> </span><span class="n">arguments</span><span class="p">:</span>
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<span class="w"> </span><span class="o">-</span><span class="n">h</span><span class="p">,</span><span class="w"> </span><span class="o">--</span><span class="n">help</span><span class="w"> </span><span class="n">show</span><span class="w"> </span><span class="n">this</span><span class="w"> </span><span class="n">help</span><span class="w"> </span><span class="n">message</span><span class="w"> </span><span class="ow">and</span><span class="w"> </span><span class="n">exit</span>
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<span class="w"> </span><span class="o">-</span><span class="n">p</span><span class="w"> </span><span class="n">PATH</span><span class="p">,</span><span class="w"> </span><span class="o">--</span><span class="n">path</span><span class="w"> </span><span class="n">PATH</span><span class="w"> </span><span class="n">Path</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">look</span><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">pictures</span><span class="o">.</span><span class="w"> </span><span class="n">If</span><span class="w"> </span><span class="n">no</span><span class="w"> </span><span class="n">output</span><span class="w"> </span><span class="k">is</span>
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<span class="w"> </span><span class="n">specified</span><span class="p">,</span><span class="w"> </span><span class="n">will</span><span class="w"> </span><span class="n">be</span><span class="w"> </span><span class="n">used</span><span class="w"> </span><span class="n">too</span><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="n">outputing</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">dynamic</span><span class="o">-</span>
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<span class="w"> </span><span class="n">wallpaper</span><span class="o">.</span><span class="n">xml</span><span class="w"> </span><span class="n">file</span><span class="o">.</span><span class="w"> </span><span class="n">Default</span><span class="w"> </span><span class="n">value</span><span class="w"> </span><span class="k">is</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">current</span>
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<span class="w"> </span><span class="n">directory</span><span class="w"> </span><span class="p">(</span><span class="o">.</span><span class="p">)</span>
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<span class="w"> </span><span class="o">-</span><span class="n">o</span><span class="w"> </span><span class="n">OUTPUT</span><span class="p">,</span><span class="w"> </span><span class="o">--</span><span class="n">output</span><span class="w"> </span><span class="n">OUTPUT</span>
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<span class="w"> </span><span class="n">Output</span><span class="w"> </span><span class="n">filename</span><span class="o">.</span><span class="w"> </span><span class="n">If</span><span class="w"> </span><span class="n">no</span><span class="w"> </span><span class="n">filename</span><span class="w"> </span><span class="k">is</span><span class="w"> </span><span class="n">specified</span><span class="p">,</span><span class="w"> </span><span class="n">a</span>
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<span class="w"> </span><span class="n">dynamic</span><span class="o">-</span><span class="n">wallpaper</span><span class="o">.</span><span class="n">xml</span><span class="w"> </span><span class="n">file</span><span class="w"> </span><span class="n">will</span><span class="w"> </span><span class="n">be</span><span class="w"> </span><span class="n">generated</span><span class="w"> </span><span class="ow">in</span><span class="w"> </span><span class="n">the</span>
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<span class="w"> </span><span class="n">path</span><span class="w"> </span><span class="n">containing</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">pictures</span><span class="o">.</span><span class="w"> </span><span class="n">You</span><span class="w"> </span><span class="n">can</span><span class="w"> </span><span class="n">also</span><span class="w"> </span><span class="n">use</span><span class="w"> </span><span class="s2">"-"</span><span class="w"> </span><span class="n">to</span>
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<span class="w"> </span><span class="n">display</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">xml</span><span class="w"> </span><span class="ow">in</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">stdout</span><span class="o">.</span>
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<span class="w"> </span><span class="o">-</span><span class="n">t</span><span class="w"> </span><span class="n">TRANSITION_TIME</span><span class="p">,</span><span class="w"> </span><span class="o">--</span><span class="n">transition</span><span class="o">-</span><span class="n">time</span><span class="w"> </span><span class="n">TRANSITION_TIME</span>
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<span class="w"> </span><span class="n">Time</span><span class="w"> </span><span class="p">(</span><span class="ow">in</span><span class="w"> </span><span class="n">seconds</span><span class="p">)</span><span class="w"> </span><span class="n">transitions</span><span class="w"> </span><span class="n">must</span><span class="w"> </span><span class="n">last</span><span class="w"> </span><span class="p">(</span><span class="n">default</span><span class="w"> </span><span class="n">value</span>
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<span class="w"> </span><span class="k">is</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="n">seconds</span><span class="p">)</span>
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<span class="w"> </span><span class="o">-</span><span class="n">d</span><span class="w"> </span><span class="n">DISPLAY_TIME</span><span class="p">,</span><span class="w"> </span><span class="o">--</span><span class="n">display</span><span class="o">-</span><span class="n">time</span><span class="w"> </span><span class="n">DISPLAY_TIME</span>
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<span class="w"> </span><span class="n">Time</span><span class="w"> </span><span class="p">(</span><span class="ow">in</span><span class="w"> </span><span class="n">seconds</span><span class="p">)</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="n">picture</span><span class="w"> </span><span class="n">must</span><span class="w"> </span><span class="n">be</span><span class="w"> </span><span class="n">displayed</span><span class="o">.</span><span class="w"> </span><span class="n">Default</span>
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<span class="w"> </span><span class="n">value</span><span class="w"> </span><span class="k">is</span><span class="w"> </span><span class="mi">900</span><span class="w"> </span><span class="p">(</span><span class="mi">15</span><span class="n">mn</span><span class="p">)</span>
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<span class="w"> </span><span class="o">-</span><span class="n">s</span><span class="p">,</span><span class="w"> </span><span class="o">--</span><span class="n">set</span><span class="o">-</span><span class="n">background</span><span class="w"> </span><span class="s1">'''try to set the background using gnome-appearance-</span>
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<span class="s1"> properties</span>
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<span class="s1"> -b, --debug</span>
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</code></pre></div>
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