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<title>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 XML 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><span class="err">shell</span>
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<span class="err">$ pip install gnome-background-generator</span>
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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="err">shell</span>
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<span class="err">$ gnome-background-generator -p ~/Images/walls -s</span>
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<span class="err">/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="err">$</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="c1">--help</span>
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<span class="k">usage</span><span class="p">:</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="p">[</span><span class="o">-</span><span class="n">h</span><span class="p">]</span> <span class="p">[</span><span class="o">-</span><span class="n">p</span> <span class="n">PATH</span><span class="p">]</span> <span class="p">[</span><span class="o">-</span><span class="n">o</span> <span class="k">OUTPUT</span><span class="p">]</span>
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<span class="p">[</span><span class="o">-</span><span class="n">t</span> <span class="n">TRANSITION_TIME</span><span class="p">]</span> <span class="p">[</span><span class="o">-</span><span class="n">d</span> <span class="n">DISPLAY_TIME</span><span class="p">]</span> <span class="p">[</span><span class="o">-</span><span class="n">s</span><span class="p">]</span>
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<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="k">simple</span> <span class="n">command</span> <span class="n">line</span> <span class="n">tool</span> <span class="k">to</span> <span class="n">generate</span> <span class="n">an</span> <span class="n">XML</span> <span class="n">file</span> <span class="k">to</span> <span class="n">use</span> <span class="k">for</span> <span class="n">gnome</span>
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<span class="n">wallpapers</span><span class="p">,</span> <span class="k">to</span> <span class="n">have</span> <span class="k">dynamic</span> <span class="n">walls</span>
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<span class="n">optional</span> <span class="n">arguments</span><span class="p">:</span>
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<span class="o">-</span><span class="n">h</span><span class="p">,</span> <span class="c1">--help show this help message and exit</span>
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<span class="o">-</span><span class="n">p</span> <span class="n">PATH</span><span class="p">,</span> <span class="c1">--path PATH Path to look for the pictures. If no output is</span>
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<span class="n">specified</span><span class="p">,</span> <span class="n">will</span> <span class="n">be</span> <span class="n">used</span> <span class="n">too</span> <span class="k">for</span> <span class="n">outputing</span> <span class="n">the</span> <span class="k">dynamic</span><span class="o">-</span>
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<span class="n">wallpaper</span><span class="p">.</span><span class="n">xml</span> <span class="n">file</span><span class="p">.</span> <span class="k">Default</span> <span class="n">value</span> <span class="k">is</span> <span class="n">the</span> <span class="k">current</span>
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<span class="n">directory</span> <span class="p">(.)</span>
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<span class="o">-</span><span class="n">o</span> <span class="k">OUTPUT</span><span class="p">,</span> <span class="c1">--output OUTPUT</span>
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<span class="k">Output</span> <span class="n">filename</span><span class="p">.</span> <span class="k">If</span> <span class="k">no</span> <span class="n">filename</span> <span class="k">is</span> <span class="n">specified</span><span class="p">,</span> <span class="n">a</span>
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<span class="k">dynamic</span><span class="o">-</span><span class="n">wallpaper</span><span class="p">.</span><span class="n">xml</span> <span class="n">file</span> <span class="n">will</span> <span class="n">be</span> <span class="k">generated</span> <span class="k">in</span> <span class="n">the</span>
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<span class="n">path</span> <span class="n">containing</span> <span class="n">the</span> <span class="n">pictures</span><span class="p">.</span> <span class="n">You</span> <span class="n">can</span> <span class="n">also</span> <span class="n">use</span> <span class="ss">"-"</span> <span class="k">to</span>
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<span class="n">display</span> <span class="n">the</span> <span class="n">xml</span> <span class="k">in</span> <span class="n">the</span> <span class="k">stdout</span><span class="p">.</span>
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<span class="o">-</span><span class="n">t</span> <span class="n">TRANSITION_TIME</span><span class="p">,</span> <span class="c1">--transition-time TRANSITION_TIME</span>
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<span class="k">Time</span> <span class="p">(</span><span class="k">in</span> <span class="n">seconds</span><span class="p">)</span> <span class="n">transitions</span> <span class="n">must</span> <span class="k">last</span> <span class="p">(</span><span class="k">default</span> <span class="n">value</span>
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<span class="k">is</span> <span class="mi">2</span> <span class="n">seconds</span><span class="p">)</span>
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<span class="o">-</span><span class="n">d</span> <span class="n">DISPLAY_TIME</span><span class="p">,</span> <span class="c1">--display-time DISPLAY_TIME</span>
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<span class="k">Time</span> <span class="p">(</span><span class="k">in</span> <span class="n">seconds</span><span class="p">)</span> <span class="n">a</span> <span class="n">picture</span> <span class="n">must</span> <span class="n">be</span> <span class="n">displayed</span><span class="p">.</span> <span class="k">Default</span>
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<span class="n">value</span> <span class="k">is</span> <span class="mi">900</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="o">-</span><span class="n">s</span><span class="p">,</span> <span class="c1">--set-background '''try to set the background using gnome-appearance-</span>
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<span class="n">properties</span>
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<span class="o">-</span><span class="n">b</span><span class="p">,</span> <span class="c1">--debug</span>
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</code></pre></div>
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