58ffcfb10e
Iterating over children and ancestors of an actor is a relatively common operation. Currently, you only have one option: start a for() loop, get the first child of the actor, and advance to the next sibling for the list of children; or start a for() loop and advance to the parent of the actor. These operations can be easily done through the ClutterActor API, but they all require going through the public API, and performing multiple type checks on the arguments. Along with the DOM API, it would be nice to have an ancillary, utility API that uses an iterator structure to hold the state, and can be advanced in a loop. https://bugzilla.gnome.org/show_bug.cgi?id=668669
310 lines
13 KiB
C
310 lines
13 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#ifndef __CLUTTER_TYPES_H__
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#define __CLUTTER_TYPES_H__
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#include <cairo.h>
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#include <clutter/clutter-enums.h>
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G_BEGIN_DECLS
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/* these macros are used to mark deprecated functions, and thus have to be
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* exposed in a public header.
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*
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* do *not* use them in other libraries depending on Clutter: use G_DEPRECATED
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* and G_DEPRECATED_FOR, or use your own wrappers around them.
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*/
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#ifdef CLUTTER_DISABLE_DEPRECATION_WARNINGS
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#define CLUTTER_DEPRECATED
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#define CLUTTER_DEPRECATED_FOR(f)
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#else
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#define CLUTTER_DEPRECATED G_DEPRECATED
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#define CLUTTER_DEPRECATED_FOR(f) G_DEPRECATED_FOR(f)
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#endif
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/* some structures are meant to be opaque and still be allocated on the stack;
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* in order to avoid people poking at their internals, we use this macro to
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* ensure that users don't accidentally access a struct private members.
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*
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* we use the CLUTTER_COMPILATION define to allow us easier access, though.
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*/
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#ifdef CLUTTER_COMPILATION
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#define CLUTTER_PRIVATE_FIELD(x) x
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#else
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#define CLUTTER_PRIVATE_FIELD(x) clutter_private_ ## x
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#endif
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#define CLUTTER_TYPE_ACTOR_BOX (clutter_actor_box_get_type ())
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#define CLUTTER_TYPE_FOG (clutter_fog_get_type ())
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#define CLUTTER_TYPE_GEOMETRY (clutter_geometry_get_type ())
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#define CLUTTER_TYPE_KNOT (clutter_knot_get_type ())
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#define CLUTTER_TYPE_MARGIN (clutter_margin_get_type ())
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#define CLUTTER_TYPE_PAINT_VOLUME (clutter_paint_volume_get_type ())
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#define CLUTTER_TYPE_PERSPECTIVE (clutter_perspective_get_type ())
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#define CLUTTER_TYPE_VERTEX (clutter_vertex_get_type ())
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typedef struct _ClutterActor ClutterActor;
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typedef struct _ClutterStage ClutterStage;
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typedef struct _ClutterContainer ClutterContainer; /* dummy */
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typedef struct _ClutterChildMeta ClutterChildMeta;
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typedef struct _ClutterLayoutMeta ClutterLayoutMeta;
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typedef struct _ClutterActorMeta ClutterActorMeta;
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typedef struct _ClutterLayoutManager ClutterLayoutManager;
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typedef struct _ClutterActorIter ClutterActorIter;
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typedef struct _ClutterAlpha ClutterAlpha;
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typedef struct _ClutterAnimatable ClutterAnimatable; /* dummy */
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typedef struct _ClutterAnimator ClutterAnimator;
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typedef struct _ClutterState ClutterState;
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typedef struct _ClutterTimeline ClutterTimeline;
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typedef struct _ClutterAction ClutterAction;
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typedef struct _ClutterConstraint ClutterConstraint;
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typedef struct _ClutterEffect ClutterEffect;
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typedef struct _ClutterPath ClutterPath;
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typedef struct _ClutterActorBox ClutterActorBox;
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typedef struct _ClutterColor ClutterColor;
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typedef struct _ClutterFog ClutterFog;
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typedef struct _ClutterGeometry ClutterGeometry;
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typedef struct _ClutterKnot ClutterKnot;
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typedef struct _ClutterMargin ClutterMargin;
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typedef struct _ClutterPerspective ClutterPerspective;
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typedef struct _ClutterVertex ClutterVertex;
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typedef struct _ClutterBehaviour ClutterBehaviour;
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typedef struct _ClutterShader ClutterShader;
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typedef union _ClutterEvent ClutterEvent;
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/**
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* ClutterPaintVolume:
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*
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* <structname>ClutterPaintVolume</structname> is an opaque structure
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* whose members cannot be directly accessed.
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*
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* A <structname>ClutterPaintVolume</structname> represents an
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* a bounding volume whos internal representation isn't defined but
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* can be set and queried in terms of an axis aligned bounding box.
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*
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* Other internal representation and methods for describing the
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* bounding volume may be added in the future.
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*
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* Since: 1.4
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*/
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typedef struct _ClutterPaintVolume ClutterPaintVolume;
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/**
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* ClutterVertex:
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* @x: X coordinate of the vertex
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* @y: Y coordinate of the vertex
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* @z: Z coordinate of the vertex
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*
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* Vertex of an actor in 3D space, expressed in pixels
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*
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* Since: 0.4
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*/
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struct _ClutterVertex
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{
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gfloat x;
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gfloat y;
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gfloat z;
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};
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GType clutter_vertex_get_type (void) G_GNUC_CONST;
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ClutterVertex *clutter_vertex_new (gfloat x,
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gfloat y,
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gfloat z);
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ClutterVertex *clutter_vertex_copy (const ClutterVertex *vertex);
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void clutter_vertex_free (ClutterVertex *vertex);
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gboolean clutter_vertex_equal (const ClutterVertex *vertex_a,
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const ClutterVertex *vertex_b);
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/**
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* ClutterActorBox:
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* @x1: X coordinate of the top left corner
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* @y1: Y coordinate of the top left corner
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* @x2: X coordinate of the bottom right corner
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* @y2: Y coordinate of the bottom right corner
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*
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* Bounding box of an actor. The coordinates of the top left and right bottom
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* corners of an actor. The coordinates of the two points are expressed in
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* pixels with sub-pixel precision
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*/
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struct _ClutterActorBox
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{
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gfloat x1;
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gfloat y1;
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gfloat x2;
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gfloat y2;
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};
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GType clutter_actor_box_get_type (void) G_GNUC_CONST;
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ClutterActorBox *clutter_actor_box_new (gfloat x_1,
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gfloat y_1,
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gfloat x_2,
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gfloat y_2);
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ClutterActorBox *clutter_actor_box_copy (const ClutterActorBox *box);
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void clutter_actor_box_free (ClutterActorBox *box);
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gboolean clutter_actor_box_equal (const ClutterActorBox *box_a,
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const ClutterActorBox *box_b);
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gfloat clutter_actor_box_get_x (const ClutterActorBox *box);
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gfloat clutter_actor_box_get_y (const ClutterActorBox *box);
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gfloat clutter_actor_box_get_width (const ClutterActorBox *box);
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gfloat clutter_actor_box_get_height (const ClutterActorBox *box);
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void clutter_actor_box_get_origin (const ClutterActorBox *box,
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gfloat *x,
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gfloat *y);
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void clutter_actor_box_get_size (const ClutterActorBox *box,
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gfloat *width,
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gfloat *height);
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gfloat clutter_actor_box_get_area (const ClutterActorBox *box);
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gboolean clutter_actor_box_contains (const ClutterActorBox *box,
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gfloat x,
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gfloat y);
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void clutter_actor_box_from_vertices (ClutterActorBox *box,
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const ClutterVertex verts[]);
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void clutter_actor_box_interpolate (const ClutterActorBox *initial,
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const ClutterActorBox *final,
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gdouble progress,
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ClutterActorBox *result);
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void clutter_actor_box_clamp_to_pixel (ClutterActorBox *box);
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void clutter_actor_box_union (const ClutterActorBox *a,
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const ClutterActorBox *b,
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ClutterActorBox *result);
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void clutter_actor_box_set_origin (ClutterActorBox *box,
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gfloat x,
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gfloat y);
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void clutter_actor_box_set_size (ClutterActorBox *box,
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gfloat width,
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gfloat height);
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/**
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* ClutterGeometry:
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* @x: X coordinate of the top left corner of an actor
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* @y: Y coordinate of the top left corner of an actor
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* @width: width of an actor
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* @height: height of an actor
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*
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* The rectangle containing an actor's bounding box, measured in pixels.
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*/
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struct _ClutterGeometry
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{
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/*< public >*/
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gint x;
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gint y;
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guint width;
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guint height;
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};
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GType clutter_geometry_get_type (void) G_GNUC_CONST;
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void clutter_geometry_union (const ClutterGeometry *geometry_a,
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const ClutterGeometry *geometry_b,
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ClutterGeometry *result);
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gboolean clutter_geometry_intersects (const ClutterGeometry *geometry0,
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const ClutterGeometry *geometry1);
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/**
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* ClutterKnot:
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* @x: X coordinate of the knot
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* @y: Y coordinate of the knot
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*
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* Point in a path behaviour.
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*
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* Since: 0.2
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*/
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struct _ClutterKnot
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{
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gint x;
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gint y;
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};
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GType clutter_knot_get_type (void) G_GNUC_CONST;
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ClutterKnot *clutter_knot_copy (const ClutterKnot *knot);
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void clutter_knot_free (ClutterKnot *knot);
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gboolean clutter_knot_equal (const ClutterKnot *knot_a,
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const ClutterKnot *knot_b);
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GType clutter_paint_volume_get_type (void) G_GNUC_CONST;
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ClutterPaintVolume *clutter_paint_volume_copy (const ClutterPaintVolume *pv);
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void clutter_paint_volume_free (ClutterPaintVolume *pv);
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void clutter_paint_volume_set_origin (ClutterPaintVolume *pv,
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const ClutterVertex *origin);
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void clutter_paint_volume_get_origin (const ClutterPaintVolume *pv,
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ClutterVertex *vertex);
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void clutter_paint_volume_set_width (ClutterPaintVolume *pv,
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gfloat width);
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gfloat clutter_paint_volume_get_width (const ClutterPaintVolume *pv);
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void clutter_paint_volume_set_height (ClutterPaintVolume *pv,
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gfloat height);
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gfloat clutter_paint_volume_get_height (const ClutterPaintVolume *pv);
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void clutter_paint_volume_set_depth (ClutterPaintVolume *pv,
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gfloat depth);
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gfloat clutter_paint_volume_get_depth (const ClutterPaintVolume *pv);
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void clutter_paint_volume_union (ClutterPaintVolume *pv,
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const ClutterPaintVolume *another_pv);
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gboolean clutter_paint_volume_set_from_allocation (ClutterPaintVolume *pv,
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ClutterActor *actor);
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/**
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* ClutterMargin:
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* @left: the margin from the left
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* @right: the margin from the right
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* @top: the margin from the top
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* @bottom: the margin from the bottom
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*
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* A representation of the components of a margin.
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*
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* Since: 1.10
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*/
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struct _ClutterMargin
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{
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float left;
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float right;
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float top;
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float bottom;
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};
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GType clutter_margin_get_type (void) G_GNUC_CONST;
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ClutterMargin * clutter_margin_new (void) G_GNUC_MALLOC;
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ClutterMargin * clutter_margin_copy (const ClutterMargin *margin_);
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void clutter_margin_free (ClutterMargin *margin_);
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G_END_DECLS
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#endif /* __CLUTTER_TYPES_H__ */
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