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<h1 class="SECT1"><a name="AEN651"></a>Connecting Widgets To Each Other</h1>
<p>We have one goal left: Enabling the <span class="GUILABEL">Extra Cheese</span> check box when the <span class="GUILABEL">Anchovies</span> check box is checked as well disabling it when the <span class="GUILABEL">Anchovies</span> check box is unchecked. You might expect that this means more additions to the <tt class="LITERAL">PizzaEntryImpl</tt> class, but this is not the case: We have the fortunate situation here that we can just connect the right signals and slots to each other and have Qt Designer and <b class="COMMAND">uic</b> do the rest.</p>
<p>Start Qt Designer again and load <tt class="FILENAME">pizza.ui</tt>. This time, we do not need to create our own slots but just use predefined ones. So start the connection tool by hitting <b class="KEYCAP">F3</b> or by any other of the previously described means and “draw” a connection between the <span class="GUILABEL">Anchovies</span> check box and the <span class="GUILABEL">Extra Cheese</span>. In the <span class="GUILABEL">Connections</span> dialog that appears, connect the <tt class="LITERAL">toggled(bool)</tt> signal, which is emitted when the <span class="GUILABEL">Anchovies</span> check box is operated, to the <tt class="LITERAL">setEnabled(bool)</tt> slot. Close the dialog with <span class="GUILABEL">OK</span>. That's all! Save your work and compile your program as described in the first section in this tutorial. Run the program and check that it actually does what we wanted.</p>
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