<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >How do I create a pixmap without having my window being realized/shown?</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="How do I render pixels (image data) to the screen?" HREF="x675.html"><LINK REL="NEXT" TITLE="How do I do drag-and-drop?" HREF="x687.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="x675.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="x687.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="AEN681" >How do I create a pixmap without having my window being realized/shown?</A ></H1 ><P >Functions such as <TT CLASS="LITERAL" >gdk_pixmap_create_from_xpm()</TT > require a valid window as a parameter. During the initialisation phase of an application, a valid window may not be available without showing a window, which may be inappropriate. In order to avoid this, a function such as <TT CLASS="LITERAL" >gdk_pixmap_colormap_create_from_xpm</TT > can be used, as in:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" > char *pixfile = "foo.xpm"; GtkWidget *top, *box, *pixw; GdkPixmap *pixmap, *pixmap_mask; top = gtk_window_new (GKT_WINDOW_TOPLEVEL); box = gtk_hbox_new (FALSE, 4); gtk_conainer_add (GTK_CONTAINER(top), box); pixmap = gdk_pixmap_colormap_create_from_xpm ( NULL, gtk_widget_get_colormap(top), &pixmap_mask, NULL, pixfile); pixw = gtk_pixmap_new (pixmap, pixmap_mask); g_object_unref (pixmap); g_object_unref (pixmap_mask);</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="x675.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="x687.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >How do I render pixels (image data) to the screen?</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 do drag-and-drop?</TD ></TR ></TABLE ></DIV ></BODY ></HTML >