<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >How do I identifiy a widgets top level window or other ancestor? [GTK 2.x]</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+: general questions" HREF="c466.html"><LINK REL="PREVIOUS" TITLE="Why don't the contents of a button move when the button is pressed? Here's a patch to make it work that way... [GTK 2.x]" HREF="x509.html"><LINK REL="NEXT" TITLE="How do I get the Window ID of a GtkWindow? [GTK 2.x]" HREF="x530.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="x509.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Development with GTK+: general questions</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="x530.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="AEN517" >How do I identifiy a widgets top level window or other ancestor? <I CLASS="EMPHASIS" >[GTK 2.x]</I ></A ></H1 ><P >There are a couple of ways to find the top level parent of a widget. The easiest way is to call the <TT CLASS="LITERAL" >gtk_widget_get_toplevel()</TT > function that returns a pointer to a GtkWidget that is the top level window.</P ><P >A more complicated way to do this (but less limited, as it allows the user to get the closest ancestor of a known type) is to use <TT CLASS="LITERAL" >gtk_widget_get_ancestor()</TT > as in:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" > GtkWidget *widget; widget = gtk_widget_get_ancestor(w, GTK_TYPE_WINDOW);</PRE ></TD ></TR ></TABLE ><P >Since virtually all the GTK_TYPEs can be used as the second parameter of this function, you can get any parent widget of a particular widget. Suppose you have an hbox which contains a vbox, which in turn contains some other atomic widget (entry, label, etc. To find the master hbox using the <TT CLASS="LITERAL" >entry</TT > widget simply use:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" > GtkWidget *hbox; hbox = gtk_widget_get_ancestor(w, GTK_TYPE_HBOX);</PRE ></TD ></TR ></TABLE ><P >You can also follow the a widgets ancestry by using the function <TT CLASS="LITERAL" >gtk_widget_get_parent()</TT > that returns a pointer to a widgets parent widget.</P ></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="x509.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="x530.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Why don't the contents of a button move when the button is pressed? Here's a patch to make it work that way... <I CLASS="EMPHASIS" >[GTK 2.x]</I ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="c466.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >How do I get the Window ID of a GtkWindow? <I CLASS="EMPHASIS" >[GTK 2.x]</I ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >