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    copied!<p>Let's say you have this ui file</p> <pre><code> &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!-- Generated with glade 3.15.3 on Tue Sep 17 10:11:35 2013 --&gt; &lt;interface&gt; &lt;!-- interface-requires gtk+ 3.10 --&gt; &lt;object class="GtkGrid" id="grid2"&gt; &lt;property name="visible"&gt;True&lt;/property&gt; &lt;property name="row_spacing"&gt;12&lt;/property&gt; &lt;property name="row_homogeneous"&gt;True&lt;/property&gt; &lt;child&gt; &lt;object class="GtkLabel" id="label1"&gt; &lt;property name="visible"&gt;True&lt;/property&gt; &lt;property name="label" translatable="yes"&gt;I'm a widget from the new content&lt;/property&gt; &lt;/object&gt; &lt;packing&gt; &lt;property name="left_attach"&gt;0&lt;/property&gt; &lt;property name="top_attach"&gt;0&lt;/property&gt; &lt;property name="width"&gt;1&lt;/property&gt; &lt;property name="height"&gt;1&lt;/property&gt; &lt;/packing&gt; &lt;/child&gt; &lt;child&gt; &lt;object class="GtkLabel" id="label2"&gt; &lt;property name="visible"&gt;True&lt;/property&gt; &lt;property name="label" translatable="yes"&gt;Me too&lt;/property&gt; &lt;/object&gt; &lt;packing&gt; &lt;property name="left_attach"&gt;0&lt;/property&gt; &lt;property name="top_attach"&gt;1&lt;/property&gt; &lt;property name="width"&gt;1&lt;/property&gt; &lt;property name="height"&gt;1&lt;/property&gt; &lt;/packing&gt; &lt;/child&gt; &lt;/object&gt; &lt;object class="GtkWindow" id="window1"&gt; &lt;child&gt; &lt;object class="GtkGrid" id="grid1"&gt; &lt;property name="visible"&gt;True&lt;/property&gt; &lt;child&gt; &lt;object class="GtkButton" id="button1"&gt; &lt;property name="label" translatable="yes"&gt;button&lt;/property&gt; &lt;property name="visible"&gt;True&lt;/property&gt; &lt;/object&gt; &lt;packing&gt; &lt;property name="left_attach"&gt;0&lt;/property&gt; &lt;property name="top_attach"&gt;0&lt;/property&gt; &lt;property name="width"&gt;1&lt;/property&gt; &lt;property name="height"&gt;1&lt;/property&gt; &lt;/packing&gt; &lt;/child&gt; &lt;child&gt; &lt;object class="GtkButton" id="button2"&gt; &lt;property name="label" translatable="yes"&gt;button&lt;/property&gt; &lt;property name="visible"&gt;True&lt;/property&gt; &lt;/object&gt; &lt;packing&gt; &lt;property name="left_attach"&gt;1&lt;/property&gt; &lt;property name="top_attach"&gt;1&lt;/property&gt; &lt;property name="width"&gt;1&lt;/property&gt; &lt;property name="height"&gt;1&lt;/property&gt; &lt;/packing&gt; &lt;/child&gt; &lt;child&gt; &lt;object class="GtkButton" id="button3"&gt; &lt;property name="label" translatable="yes"&gt;button&lt;/property&gt; &lt;property name="visible"&gt;True&lt;/property&gt; &lt;/object&gt; &lt;packing&gt; &lt;property name="left_attach"&gt;2&lt;/property&gt; &lt;property name="top_attach"&gt;2&lt;/property&gt; &lt;property name="width"&gt;1&lt;/property&gt; &lt;property name="height"&gt;1&lt;/property&gt; &lt;/packing&gt; &lt;/child&gt; &lt;/object&gt; &lt;/child&gt; &lt;/object&gt; &lt;/interface&gt; </code></pre> <p>Now, you create you your window as usual:</p> <pre><code> window1 = self.builder.get_object('window2') window1.show_all() </code></pre> <p>If you want to change the content of the window. Then you need to destroy/hide the widget you want to hide.</p> <pre><code> grid1 = self.builder.get_object('grid1') grid1.destroy() grid2 = self.builder.get_object('grid2') window1.add (grid2) </code></pre> <p>And we're all good to go. You can load your second widget hierarchy (<em>grid2</em>, I mean) from the same initial ui file or from a new one. What you need to understand, is that after the <strong>Builder</strong> create the objects from the ui files, it can't modify those further.</p>
 

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