<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >How do I catch a combo box change?</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="GTK+ FAQ" HREF="book1.html"><LINK REL="UP" TITLE="Development with GTK+: widget specific questions" HREF="c698.html"><LINK REL="PREVIOUS" TITLE="I don't want the user of my applications to enter text into a GtkCombo. Any idea?" HREF="x743.html"><LINK REL="NEXT" TITLE="How can I define a separation line in a menu?" HREF="x760.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >GTK+ FAQ</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="x743.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Development with GTK+: widget specific questions</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="x760.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="AEN750" >How do I catch a combo box change?</A ></H1 ><P >The entry which is associated to your GtkCombo send a "changed" signal when:</P ><P ></P ><UL ><LI ><P >some text is typed in</P ></LI ><LI ><P >the selection of the combo box is changed</P ></LI ></UL ><P >To catch any combo box change, simply connect your signal handler with</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" > gtk_signal_connect(GTK_COMBO(cb)->entry, "changed", GTK_SIGNAL_FUNC(my_cb_change_handler), NULL);</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="x743.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="book1.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="x760.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >I don't want the user of my applications to enter text into a GtkCombo. Any idea?</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="c698.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >How can I define a separation line in a menu?</TD ></TR ></TABLE ></DIV ></BODY ></HTML >