title: Javafx : SplitPane resize children
body: <p>I fave an .fxml file, in which I have added some <code>TitledPane</code> but I cannot resize them in the application. Here is the code: </p>
  
  <pre><code>&lt;ScrollPane AnchorPane.topAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.bottomAnchor="0.0"
              AnchorPane.leftAnchor="0.0"&gt;
      &lt;SplitPane orientation="VERTICAL" fx:id="splitPane"&gt;
          &lt;TitledPane&gt;
              &lt;TextArea fx:id="taTop" wrapText="true" editable="false" prefHeight="100"/&gt;
          &lt;/TitledPane&gt;
          &lt;TitledPane&gt;
              &lt;TableView fx:id="tableFrist" minHeight="120" maxHeight="120"&gt;
                  &lt;columns&gt;
                      &lt;TableColumn fx:id="column" prefWidth="200"/&gt;
                  &lt;/columns&gt;
              &lt;/TableView&gt;
          &lt;/TitledPane&gt;
          &lt;TitledPane&gt;
              &lt;TreeTableView fx:id="tableSecond"&gt;
                  &lt;columns&gt;
                      &lt;TreeTableColumn fx:id="columnTreeS" prefWidth="200"/&gt;
                  &lt;/columns&gt;
              &lt;/TreeTableView&gt;
          &lt;/TitledPane&gt;
          &lt;TitledPane&gt;
              &lt;TreeTableView fx:id="tableThird"&gt;
                  &lt;columns&gt;
                      &lt;TreeTableColumn fx:id="columnTreeT" prefWidth="200"/&gt;
                  &lt;/columns&gt;
              &lt;/TreeTableView&gt;
          &lt;/TitledPane&gt;
          &lt;TitledPane&gt;
              &lt;TextArea fx:id="taBot" wrapText="true" editable="false"/&gt;
          &lt;/TitledPane&gt;
      &lt;/SplitPane&gt;
  &lt;/ScrollPane&gt;
  </code></pre>
  
  <p>What did I miss, or why I cannot resise the panes?</p>