ui: add basic GTK gui (v5)

This is minimalistic and just contains the basic widget infrastructure.  The GUI
consists of a menu and a GtkNotebook.  To start with, the notebook has its tabs
hidden which provides a UI that looks very similar to SDL with the exception of
the menu bar.

The menu bar allows a user to toggle the visibility of the tabs.  Cairo is used
for rendering.

I used gtk-vnc as a reference.  gtk-vnc solves the same basic problems as QEMU
since it was originally written as a remote display for QEMU.  So for the most
part, the approach to rendering and keyboard handling should be pretty solid for
GTK.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1361367806-4599-4-git-send-email-aliguori@us.ibm.com

configure

@@ -226,6 +226,7 @@ coroutine=""
 seccomp=""
 glusterfs=""
 virtio_blk_data_plane=""
+gtk=""
 
 # parse CC options first
 for opt do
@@ -897,6 +898,10 @@ for opt do
   ;;
   --enable-virtio-blk-data-plane) virtio_blk_data_plane="yes"
   ;;
+  --disable-gtk) gtk="no"
+  ;;
+  --enable-gtk) gtk="yes"
+  ;;
   *) echo "ERROR: unknown option $opt"; show_help="yes"
   ;;
   esac
@@ -1635,6 +1640,26 @@ if test "$sparse" != "no" ; then
   fi
 fi
 
+##########################################
+# GTK probe
+
+if test "$gtk" != "no"; then
+    if $pkg_config gtk+-2.0 --modversion >/dev/null 2>/dev/null && \
+       $pkg_config vte --modversion >/dev/null 2>/dev/null; then
+	gtk_cflags=`$pkg_config --cflags gtk+-2.0 2>/dev/null`
+	gtk_libs=`$pkg_config --libs gtk+-2.0 2>/dev/null`
+	vte_cflags=`$pkg_config --cflags vte 2>/dev/null`
+	vte_libs=`$pkg_config --libs vte 2>/dev/null`
+	libs_softmmu="$gtk_libs $vte_libs $libs_softmmu"
+	gtk="yes"
+    else
+	if test "$gtk" = "yes" ; then
+	    feature_not_found "gtk"
+	fi
+	gtk="no"
+    fi
+fi
+
 ##########################################
 # SDL probe
 
@@ -3301,6 +3326,7 @@ if test "$darwin" = "yes" ; then
 fi
 echo "pixman            $pixman"
 echo "SDL support       $sdl"
+echo "GTK support       $gtk"
 echo "curses support    $curses"
 echo "curl support      $curl"
 echo "mingw32 support   $mingw32"
@@ -3591,6 +3617,11 @@ if test "$bluez" = "yes" ; then
   echo "BLUEZ_CFLAGS=$bluez_cflags" >> $config_host_mak
 fi
 echo "GLIB_CFLAGS=$glib_cflags" >> $config_host_mak
+if test "$gtk" = "yes" ; then
+  echo "CONFIG_GTK=y" >> $config_host_mak
+  echo "GTK_CFLAGS=$gtk_cflags" >> $config_host_mak
+  echo "VTE_CFLAGS=$vte_cflags" >> $config_host_mak
+fi
 if test "$xen" = "yes" ; then
   echo "CONFIG_XEN_BACKEND=y" >> $config_host_mak
   echo "CONFIG_XEN_CTRL_INTERFACE_VERSION=$xen_ctrl_version" >> $config_host_mak

include/sysemu/sysemu.h

@@ -89,6 +89,7 @@ typedef enum DisplayType
     DT_DEFAULT,
     DT_CURSES,
     DT_SDL,
+    DT_GTK,
     DT_NOGRAPHIC,
     DT_NONE,
 } DisplayType;

include/ui/console.h

@@ -487,4 +487,8 @@ void curses_display_init(DisplayState *ds, int full_screen);
 int index_from_key(const char *key);
 int index_from_keycode(int code);
 
+/* gtk.c */
+void early_gtk_display_init(void);
+void gtk_display_init(DisplayState *ds);
+
 #endif

ui/Makefile.objs

@@ -13,7 +13,10 @@ common-obj-$(CONFIG_SDL) += sdl.o sdl_zoom.o x_keymap.o
 common-obj-$(CONFIG_COCOA) += cocoa.o
 common-obj-$(CONFIG_CURSES) += curses.o
 common-obj-$(CONFIG_VNC) += $(vnc-obj-y)
+common-obj-$(CONFIG_GTK) += gtk.o
 
 $(obj)/sdl.o $(obj)/sdl_zoom.o: QEMU_CFLAGS += $(SDL_CFLAGS) 
 
 $(obj)/cocoa.o: $(SRC_PATH)/$(obj)/cocoa.m
+
+$(obj)/gtk.o: QEMU_CFLAGS += $(GTK_CFLAGS) $(VTE_CFLAGS)