<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Arrows</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="GTK+ 2.0 Tutorial" HREF="book1.html"><LINK REL="UP" TITLE="Miscellaneous Widgets" HREF="c753.html"><LINK REL="PREVIOUS" TITLE="Miscellaneous Widgets" HREF="c753.html"><LINK REL="NEXT" TITLE="The Tooltips Object" HREF="x810.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+ 2.0 Tutorial</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="c753.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Miscellaneous Widgets</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="x810.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="SEC-ARROWS" >Arrows</A ></H1 ><P >The Arrow widget draws an arrowhead, facing in a number of possible directions and having a number of possible styles. It can be very useful when placed on a button in many applications. Like the Label widget, it emits no signals.</P ><P >There are only two functions for manipulating an Arrow widget:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >GtkWidget *gtk_arrow_new( GtkArrowType arrow_type, GtkShadowType shadow_type ); void gtk_arrow_set( GtkArrow *arrow, GtkArrowType arrow_type, GtkShadowType shadow_type );</PRE ></TD ></TR ></TABLE ><P >The first creates a new arrow widget with the indicated type and appearance. The second allows these values to be altered retrospectively. The <TT CLASS="LITERAL" >arrow_type</TT > argument may take one of the following values:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" > GTK_ARROW_UP GTK_ARROW_DOWN GTK_ARROW_LEFT GTK_ARROW_RIGHT</PRE ></TD ></TR ></TABLE ><P >These values obviously indicate the direction in which the arrow will point. The <TT CLASS="LITERAL" >shadow_type</TT > argument may take one of these values:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" > GTK_SHADOW_IN GTK_SHADOW_OUT (the default) GTK_SHADOW_ETCHED_IN GTK_SHADOW_ETCHED_OUT</PRE ></TD ></TR ></TABLE ><P >Here's a brief example to illustrate their use.</P ><P ><SPAN CLASS="INLINEMEDIAOBJECT" ><IMG SRC="images/arrow.png"></SPAN ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" > #include <gtk/gtk.h> /* Create an Arrow widget with the specified parameters * and pack it into a button */ static GtkWidget *create_arrow_button( GtkArrowType arrow_type, GtkShadowType shadow_type ) { GtkWidget *button; GtkWidget *arrow; button = gtk_button_new (); arrow = gtk_arrow_new (arrow_type, shadow_type); gtk_container_add (GTK_CONTAINER (button), arrow); gtk_widget_show (button); gtk_widget_show (arrow); return button; } int main( int argc, char *argv[] ) { /* GtkWidget is the storage type for widgets */ GtkWidget *window; GtkWidget *button; GtkWidget *box; /* Initialize the toolkit */ gtk_init (&argc, &argv); /* Create a new window */ window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_title (GTK_WINDOW (window), "Arrow Buttons"); /* It's a good idea to do this for all windows. */ g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL); /* Sets the border width of the window. */ gtk_container_set_border_width (GTK_CONTAINER (window), 10); /* Create a box to hold the arrows/buttons */ box = gtk_hbox_new (FALSE, 0); gtk_container_set_border_width (GTK_CONTAINER (box), 2); gtk_container_add (GTK_CONTAINER (window), box); /* Pack and show all our widgets */ gtk_widget_show (box); button = create_arrow_button (GTK_ARROW_UP, GTK_SHADOW_IN); gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 3); button = create_arrow_button (GTK_ARROW_DOWN, GTK_SHADOW_OUT); gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 3); button = create_arrow_button (GTK_ARROW_LEFT, GTK_SHADOW_ETCHED_IN); gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 3); button = create_arrow_button (GTK_ARROW_RIGHT, GTK_SHADOW_ETCHED_OUT); gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 3); gtk_widget_show (window); /* Rest in gtk_main and wait for the fun to begin! */ gtk_main (); return 0; }</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="c753.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="x810.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Miscellaneous Widgets</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="c753.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >The Tooltips Object</TD ></TR ></TABLE ></DIV ></BODY ></HTML >