Hi,
A few days ago I was asked to find a way to change the mouse cursor in
a clutter Stage via pyclutter.
As there is no API for this in clutter, and it didn't seems possible
to retrieve X display and X window objects in pyclutter.
I came up with a patch for clutter 1.6.16 and pyclutter.
I only added the X11 backend functions.
Any feedback is appreciated.
Is there an other way to do this without modifying clutter source code ?
(Hiding the cursor and put a Texture where it should be is not a
viable option for me.)
Regards,
Yann Le Hir
diff -r clutter-1.6.16/clutter/clutter-stage.c clutter-1.6.16_modified/clutter/clutter-stage.c
150a151
> guint cursor_type : 1;
170a172
> PROP_CURSOR_TYPE,
1108a1111,1114
> case PROP_CURSOR_TYPE:
> clutter_stage_set_cursor(stage, g_value_get_int(value));
> break;
>
1176a1183,1186
> case PROP_CURSOR_TYPE:
> g_value_set_int (value, priv->cursor_type);
> break;
>
1347a1358,1371
>
> /**
> * ClutterStage:cursor-visible:
> *
> * Whether the mouse pointer should be visible
> */
> pspec = g_param_spec_boolean ("cursor-type",
> P_("Cursor Type"),
> P_("Mouse pointer type on the main stage"),
> TRUE,
> CLUTTER_PARAM_READWRITE);
> g_object_class_install_property (gobject_class,
> PROP_CURSOR_TYPE,
> pspec);
2127a2152,2182
> }
> }
> }
>
> /**
> * clutter_stage_set_cursor:
> * @stage: a #ClutterStage
> * @cursor_type: The id of the cursor to display
> *
> * Change the cursor on the stage window
> */
> void
> clutter_stage_set_cursor (ClutterStage *stage, gint cursor_type)
> {
> ClutterStagePrivate *priv;
>
> g_return_if_fail (CLUTTER_IS_STAGE (stage));
>
> priv = stage->priv;
> if (priv->is_cursor_visible)
> {
> ClutterStageWindow *impl = CLUTTER_STAGE_WINDOW (priv->impl);
> ClutterStageWindowIface *iface;
>
> iface = CLUTTER_STAGE_WINDOW_GET_IFACE (impl);
> if (iface->set_cursor)
> {
> priv->cursor_type = cursor_type;
> iface->set_cursor (impl, cursor_type);
>
> g_object_notify (G_OBJECT (stage), "cursor-type");
diff -r clutter-1.6.16/clutter/clutter-stage.h clutter-1.6.16_modified/clutter/clutter-stage.h
205a206
> void clutter_stage_set_cursor (ClutterStage *stage, gint cursor);
diff -r clutter-1.6.16/clutter/clutter-stage-window.c clutter-1.6.16_modified/clutter/clutter-stage-window.c
49a50,59
> _clutter_stage_window_set_cursor (ClutterStageWindow *window,
> gint cursor)
> {
> CLUTTER_STAGE_WINDOW_GET_IFACE (window)->set_cursor (window,
> cursor);
> }
>
>
>
> void
diff -r clutter-1.6.16/clutter/clutter-stage-window.h clutter-1.6.16_modified/clutter/clutter-stage-window.h
43a44,46
> void (* set_cursor) (ClutterStageWindow *stage_window,
> int cursor);
>
82a86,88
> void _clutter_stage_window_set_cursor (ClutterStageWindow *window,
> int cursor);
>
diff -r clutter-1.6.16/clutter/x11/clutter-stage-x11.c clutter-1.6.16_modified/clutter/x11/clutter-stage-x11.c
373a374,393
> static inline void
> set_cursor (ClutterStageX11 *stage_x11, gint type)
> {
> ClutterBackendX11 *backend_x11 = stage_x11->backend;
>
> if (stage_x11->xwin == None)
> return;
>
> CLUTTER_NOTE (BACKEND, "setting cursor ('%d') over stage window (%u)",
> (int) type,
> (unsigned int) stage_x11->xwin);
>
> Cursor xcursor;
> xcursor = XCreateFontCursor (backend_x11->xdpy,
> type);
> XDefineCursor (backend_x11->xdpy,
> stage_x11->xwin,
> xcursor);
> }
>
559a580,589
> clutter_stage_x11_set_cursor (ClutterStageWindow *stage_window,
> gint type)
> {
> ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (stage_window);
> stage_x11->cursor_type = type;
> set_cursor (stage_x11, type);
> }
>
>
> static void
751a782
> iface->set_cursor = clutter_stage_x11_set_cursor;
diff -r clutter-1.6.16/clutter/x11/clutter-stage-x11.h clutter-1.6.16_modified/clutter/x11/clutter-stage-x11.h
71a72
> gint cursor_type : 1;
73a75
>
diff --git a/clutter/clutter-base.defs b/clutter/clutter-base.defs
index 84fc1e7..d6d7002 100644
--- a/clutter/clutter-base.defs
+++ b/clutter/clutter-base.defs
@@ -5846,6 +5846,18 @@
(return-type "gboolean")
)
+(define-method set_cursor
+ (of-object "ClutterStage")
+ (c-name "clutter_stage_set_cursor")
+ (docstring
+ "Change the cursor on the stage window\n"
+ )
+ (return-type "none")
+ (parameters
+ '("guint" "cursor_type")
+ )
+)
+
(define-method show_cursor
(of-object "ClutterStage")
(c-name "clutter_stage_show_cursor")
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