Hi, ok it was easier than I thought. Creating an hbox and attaching textures was the correct thing, I suppose. The width and height would have been calculated on that hbox.
I attach the sample program, if someone would ever need that. regards, Massimo On 12/13/2010 12:48 AM, Massimo Cora' wrote:
Hi, I'm trying to subclass ClutterActor to create a composite actor. The resulting actor would be really simple because composed by an horizontal box with three textures loaded. I'm a bit confused by the docs and because I don't have a clean simple example on how to do it. On my code I've tried to implement map, unmap, get_preferred_width, get_preferred_height, paint, allocate, and also pick, but I wasn't able to have it displayed. Can you please point me to something specific? thanks and regards, Massimo Corà _______________________________________________ clutter-app-devel-list mailing list [email protected] http://lists.clutter-project.org/listinfo/clutter-app-devel-list
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */ /* * * Copyright (C) Massimo Cora' 2010 <[email protected]> * */ #include "test-subclassing.h" struct _SelectionSongPriv { ClutterActor *foo_plus; ClutterActor *foo_minus; ClutterActor *hbox; ClutterLayoutManager *layout_hbox; }; #define PLUS_TEX "./button-plus.png" #define MINUS_TEX "./button-minus.png" #define SELECTION_SONG_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \ SELECTION_TYPE_SONG, SelectionSongPriv)) G_DEFINE_TYPE (SelectionSong, selection_song, CLUTTER_TYPE_ACTOR); static void selection_song_init (SelectionSong *object) { SelectionSongPriv *priv; priv = SELECTION_SONG_GET_PRIVATE (object); priv->layout_hbox = clutter_box_layout_new (); priv->hbox = clutter_box_new (priv->layout_hbox); priv->foo_plus = clutter_texture_new_from_file (PLUS_TEX, NULL); priv->foo_minus = clutter_texture_new_from_file (MINUS_TEX, NULL); clutter_box_layout_pack (CLUTTER_BOX_LAYOUT (priv->layout_hbox), priv->foo_plus, FALSE, FALSE, /* x-fill */ FALSE, /* y-fill */ CLUTTER_BOX_ALIGNMENT_START, CLUTTER_BOX_ALIGNMENT_CENTER); clutter_box_layout_pack (CLUTTER_BOX_LAYOUT (priv->layout_hbox), priv->foo_minus, FALSE, FALSE, /* x-fill */ FALSE, /* y-fill */ CLUTTER_BOX_ALIGNMENT_END, CLUTTER_BOX_ALIGNMENT_CENTER); clutter_actor_set_parent (priv->hbox, CLUTTER_ACTOR (object)); } static void selection_song_finalize (GObject *object) { /* TODO: Add deinitalization code here */ G_OBJECT_CLASS (selection_song_parent_class)->finalize (object); } static void selection_song_map (ClutterActor *object) { SelectionSongPriv *priv; priv = SELECTION_SONG_GET_PRIVATE (object); CLUTTER_ACTOR_CLASS (selection_song_parent_class)->map (object); DEBUG_PRINT ("map called"); clutter_actor_map (priv->hbox); } static void selection_song_unmap (ClutterActor *object) { SelectionSongPriv *priv; priv = SELECTION_SONG_GET_PRIVATE (object); CLUTTER_ACTOR_CLASS (selection_song_parent_class)->unmap (object); DEBUG_PRINT ("unmap called"); clutter_actor_unmap (priv->hbox); } static void selection_song_get_preferred_width (ClutterActor *actor, gfloat for_height, gfloat *min_width_p, gfloat *natural_width_p) { SelectionSongPriv *priv; priv = SELECTION_SONG_GET_PRIVATE (actor); DEBUG_PRINT ("get_preferred_width [%f]", for_height); *natural_width_p = *min_width_p = clutter_actor_get_width (priv->hbox); } static void selection_song_get_preferred_height (ClutterActor *actor, gfloat for_width, gfloat *min_height_p, gfloat *natural_height_p) { SelectionSongPriv *priv; priv = SELECTION_SONG_GET_PRIVATE (actor); DEBUG_PRINT ("get_preferred_height [%f]", for_width); *natural_height_p = *min_height_p = clutter_actor_get_height (priv->hbox); } static void selection_song_paint (ClutterActor *actor) { SelectionSongPriv *priv; priv = SELECTION_SONG_GET_PRIVATE (actor); clutter_actor_paint (priv->hbox); } static void selection_song_allocate (ClutterActor *actor, const ClutterActorBox *box, ClutterAllocationFlags flags) { SelectionSongPriv *priv; ClutterActorClass *parent_class; priv = SELECTION_SONG_GET_PRIVATE (actor); parent_class = CLUTTER_ACTOR_CLASS (selection_song_parent_class); parent_class->allocate (actor, box, flags); clutter_actor_allocate (priv->hbox, box, flags); } static void selection_song_class_init (SelectionSongClass *klass) { GObjectClass* object_class = G_OBJECT_CLASS (klass); ClutterActorClass* actor_class = CLUTTER_ACTOR_CLASS (klass); object_class->finalize = selection_song_finalize; actor_class->map = selection_song_map; actor_class->unmap = selection_song_unmap; actor_class->get_preferred_width = selection_song_get_preferred_width; actor_class->get_preferred_height = selection_song_get_preferred_height; actor_class->paint = selection_song_paint; actor_class->allocate = selection_song_allocate; g_type_class_add_private (klass, sizeof (SelectionSongPriv)); } SelectionSong * selection_song_new () { return g_object_new (SELECTION_TYPE_SONG, NULL); } int main (int argc, char ** argv) { ClutterStage *stage; ClutterActor *actor; clutter_init (&argc, &argv); actor = CLUTTER_ACTOR (selection_song_new ()); stage = CLUTTER_STAGE (clutter_stage_get_default ()); clutter_container_add (CLUTTER_CONTAINER (stage), actor, NULL); clutter_actor_show ( CLUTTER_ACTOR (stage)); clutter_main(); return 0; }
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */ /* * * Copyright (C) Massimo Cora' 2010 <[email protected]> * */ #ifndef _SELECTION_SONG_H_ #define _SELECTION_SONG_H_ #include <glib-object.h> #include <glib.h> #include <gio/gio.h> #include <clutter/clutter.h> #if defined (__GNUC__) && (__GNUC__ >= 3) && !defined(__STRICT_ANSI__) #define DEBUG_PRINT(format, ...) g_debug ("%s:%d (%s) " format, __FILE__, __LINE__, G_STRFUNC, ##__VA_ARGS__) #else #define DEBUG_PRINT g_debug #endif G_BEGIN_DECLS #define SELECTION_TYPE_SONG (selection_song_get_type ()) #define SELECTION_SONG(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SELECTION_TYPE_SONG, SelectionSong)) #define SELECTION_SONG_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), SELECTION_TYPE_SONG, SelectionSongClass)) #define SELECTION_IS_SONG(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SELECTION_TYPE_SONG)) #define SELECTION_IS_SONG_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), SELECTION_TYPE_SONG)) #define SELECTION_SONG_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), SELECTION_TYPE_SONG, SelectionSongClass)) typedef struct _SelectionSongClass SelectionSongClass; typedef struct _SelectionSong SelectionSong; typedef struct _SelectionSongPriv SelectionSongPriv; struct _SelectionSongClass { ClutterActorClass parent_class; }; struct _SelectionSong { ClutterActor parent_instance; SelectionSongPriv *priv; }; SelectionSong * selection_son_new (); GType selection_song_get_type (void) G_GNUC_CONST; G_END_DECLS #endif /* _SELECTION_SONG_H_ */
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