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<HTML><HEAD><TITLE>Arrows</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.49"><LINKREL="HOME"TITLE="GTK+ 1.2 Tutorial"HREF="gtk-tut.html"><LINKREL="UP"TITLE="Miscellaneous Widgets"HREF="ch-miscwidgets.html"><LINKREL="PREVIOUS"TITLE="Miscellaneous Widgets"HREF="ch-miscwidgets.html"><LINKREL="NEXT"TITLE="The Tooltips Object"HREF="sec-thetooltipsobject.html"></HEAD></head><body bgcolor="#FFFFFF" marginheight=0 marginwidth=0 width="100%"><table cellspacing=6 border=0 cellpadding=0 width="100%"> <tr> <td bgcolor="#FFFFFF" valign=top nowrap> <centeR><A HREF="/"><img src="/images/gtk-logo-rgb.gif" width=107 height=140 border=0></A> <font face="helvetica,lucidia" color="#000000"><BR><BR><b>GTK+<BR>The GIMP Toolkit</b></center><BR><table width=100% cellspacing=0 cellpadding=2 border=0><tr><td bgcolor="#000000"><table width=100% cellspacing=0 cellpadding=4 border=0><tr><td bgcolor="#AAAAEE" nowrap><B>General</B></td></tr><tr><td bgcolor="#FFFFFF" nowrap><A HREF="/">Introduction</A><BR><A HREF="/screenshots/">Screenshots</A><br><A HREF="/download/">Download</A><br><A HREF="/mailinglists.html">Mailing Lists</A><BR><A HREF="/bindings.html">Language Bindings</A><BR><A HREF="http://gtk.themes.org/">Themes</A><BR><A HREF="/bugs.html">Bug Tracker</A><BR></td></tr></table></td></tr></table><BR> <table width=100% cellspacing=0 cellpadding=2 border=0><tr><td bgcolor="#000000"><table width=100% cellspacing=0 cellpadding=4 border=0><tr><td bgcolor="#AAAAEE" nowrap><B>Documentation</B></td></tr><tr><td bgcolor="#FFFFFF" nowrap><A HREF="/faq/">FAQ</A><br><A HREF="/tutorial/">Tutorial</A><BR><A HREF="/api/">API Reference</A><br><A HREF="/books.html">Published Books</A><BR></td></tr></table></td></tr></table><BR> <table width=100% cellspacing=0 cellpadding=2 border=0><tr><td bgcolor="#000000"><table width=100% cellspacing=0 cellpadding=4 border=0><tr><td bgcolor="#AAAAEE" nowrap><B>Projects</B></td></tr><tr><td bgcolor="#FFFFFF" nowrap><A HREF="http://www.pango.org/">Pango</A><BR><A HREF="http://sources.redhat.com/inti/">Inti</A><BR><A HREF="http://www.gnome.org/">GNOME</A><BR><A HREF="http://user.sgic.fi/~tml/gimp/win32/">GTK+ for Win32</A><br><A HREF="http://people.redhat.com/sopwith/gtkfb/">GtkFB (Framebuffer)</A><br><A HREF="http://www.directfb.org/gtk.xml">GTK+ on DirectFB</A><BR><A HREF="/beos/">GTK+ for BeOS</A></td></tr></table></td></tr></table><BR> <table width=100% cellspacing=0 cellpadding=2 border=0><tr><td bgcolor="#000000"><table width=100% cellspacing=0 cellpadding=4 border=0><tr><td bgcolor="#AAAAEE" nowrap><B><B>Applications</B></B></td></tr><tr><td bgcolor="#FFFFFF" nowrap><A HREF="http://www.gimp.org/">GIMP</A><BR><A HREF="http://www.abiword.org/">Abiword</A><BR><A HREF="http://www.lysator.liu.se/~alla/dia/dia.html">Dia</A><BR><A HREF="http://glade.pn.org/">Glade</A><BR><A HREF="http://www.gnucash.org/">GnuCash</A><BR><A HREF="http://www.gnome.org/projects/gnumeric/">Gnumeric</A><BR><BR><A HREF="http://www.gnome.org/applist/">GNOME Software Map</A><br></td></tr></table></td></tr></table><BR> </td> <td bgcolor="#ffffff" valign=top width="99%"><font face="lucida,helvetica"><BODYCLASS="SECT1"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">GTK+ 1.2 Tutorial</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="ch-miscwidgets.html"><<< Previous</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 9. Miscellaneous Widgets</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sec-thetooltipsobject.html">Next >>></A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="SEC-ARROWS">9.2. Arrows</A></H1><P>The Arrow widget draws an arrowhead, facing in a number of possibledirections and having a number of possible styles. It can be veryuseful when placed on a button in many applications. Like the Labelwidget, it emits no signals.</P><P>There are only two functions for manipulating an Arrow widget:</P><TABLEBORDER="0"BGCOLOR="#E0E0E0"WIDTH="100%"><TR><TD><PRECLASS="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 andappearance. The second allows these values to be alteredretrospectively. The <TTCLASS="LITERAL">arrow_type</TT> argument may take one of thefollowing values:</P><TABLEBORDER="0"BGCOLOR="#E0E0E0"WIDTH="100%"><TR><TD><PRECLASS="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 willpoint. The <TTCLASS="LITERAL">shadow_type</TT> argument may take one of these values:</P><TABLEBORDER="0"BGCOLOR="#E0E0E0"WIDTH="100%"><TR><TD><PRECLASS="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><TABLEBORDER="0"BGCOLOR="#E0E0E0"WIDTH="100%"><TR><TD><PRECLASS="PROGRAMLISTING">/* example-start arrow arrow.c */#include <gtk/gtk.h>/* Create an Arrow widget with the specified parameters * and pack it into a button */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. */ gtk_signal_connect (GTK_OBJECT (window), "destroy", GTK_SIGNAL_FUNC (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);}/* example-end */</PRE></TD></TR></TABLE></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="ch-miscwidgets.html"><<< Previous</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="gtk-tut.html">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="sec-thetooltipsobject.html">Next >>></A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Miscellaneous Widgets</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ch-miscwidgets.html">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">The Tooltips Object</TD></TR></TABLE></DIV> </td> </tr></table> </td> </tr></table></body></BODY></HTML>⌨️ 快捷键说明
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