185 lines
6.3 KiB
C
185 lines
6.3 KiB
C
/* -*- mode:C; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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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: Tomas Frydrych <tf@openedhand.com>
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* Emmanuele Bassu <ebassi@linux.intel.com>
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*
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* Copyright (C) 2007, 2008 OpenedHand
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* Copyright (C) 2009 Intel Corp.
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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_UNITS_H__
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#define __CLUTTER_UNITS_H__
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#include <glib-object.h>
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#include <cogl/cogl.h>
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G_BEGIN_DECLS
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/**
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* ClutterUnits:
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*
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* An opaque structure, to be used to store sizing and positioning
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* values along with their unit.
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*
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* Since: 1.0
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*/
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typedef struct _ClutterUnits ClutterUnits;
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struct _ClutterUnits
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{
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/*< private >*/
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ClutterUnitType unit_type;
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gfloat value;
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/* pre-filled by the provided constructors */
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/* cached pixel value */
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gfloat pixels;
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/* whether the :pixels field is set */
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guint pixels_set;
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/* the serial coming from the backend, used to evict the cache */
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gint32 serial;
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/* padding for eventual expansion */
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gint32 __padding_1;
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gint64 __padding_2;
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};
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CLUTTER_AVAILABLE_IN_1_0
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GType clutter_units_get_type (void) G_GNUC_CONST;
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CLUTTER_AVAILABLE_IN_1_0
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ClutterUnitType clutter_units_get_unit_type (const ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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gfloat clutter_units_get_unit_value (const ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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ClutterUnits * clutter_units_copy (const ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_free (ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_pixels (ClutterUnits *units,
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gint px);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_em (ClutterUnits *units,
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gfloat em);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_em_for_font (ClutterUnits *units,
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const gchar *font_name,
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gfloat em);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_mm (ClutterUnits *units,
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gfloat mm);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_cm (ClutterUnits *units,
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gfloat cm);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_units_from_pt (ClutterUnits *units,
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gfloat pt);
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CLUTTER_AVAILABLE_IN_1_0
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gfloat clutter_units_to_pixels (ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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gboolean clutter_units_from_string (ClutterUnits *units,
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const gchar *str);
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CLUTTER_AVAILABLE_IN_1_0
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gchar * clutter_units_to_string (const ClutterUnits *units);
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/* shorthands for the constructors */
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#define clutter_units_pixels clutter_units_from_pixels
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#define clutter_units_em clutter_units_from_em
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#define clutter_units_em_for_font clutter_units_from_em_for_font
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#define clutter_units_mm clutter_units_from_mm
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#define clutter_units_cm clutter_units_from_cm
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#define clutter_units_pt clutter_units_from_pt
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#define CLUTTER_TYPE_UNITS (clutter_units_get_type ())
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#define CLUTTER_TYPE_PARAM_UNITS (clutter_param_units_get_type ())
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#define CLUTTER_PARAM_SPEC_UNITS(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), CLUTTER_TYPE_PARAM_UNITS, ClutterParamSpecUnits))
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#define CLUTTER_IS_PARAM_SPEC_UNITS(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), CLUTTER_TYPE_PARAM_UNITS))
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/**
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* CLUTTER_VALUE_HOLDS_UNITS:
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* @x: a #GValue
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*
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* Evaluates to %TRUE if @x holds a #ClutterUnits value
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*
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* Since: 0.8
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*/
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#define CLUTTER_VALUE_HOLDS_UNITS(x) (G_VALUE_HOLDS ((x), CLUTTER_TYPE_UNITS))
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typedef struct _ClutterParamSpecUnits ClutterParamSpecUnits;
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/**
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* ClutterParamSpecUnits: (skip)
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* @default_type: default type
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* @default_value: default value
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* @minimum: lower boundary
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* @maximum: higher boundary
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*
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* #GParamSpec subclass for unit based properties.
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*
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* Since: 1.0
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*/
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struct _ClutterParamSpecUnits
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{
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/*< private >*/
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GParamSpec parent_instance;
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/*< public >*/
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ClutterUnitType default_type;
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gfloat default_value;
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gfloat minimum;
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gfloat maximum;
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};
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CLUTTER_AVAILABLE_IN_1_0
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GType clutter_param_units_get_type (void) G_GNUC_CONST;
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CLUTTER_AVAILABLE_IN_1_0
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GParamSpec * clutter_param_spec_units (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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ClutterUnitType default_type,
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gfloat minimum,
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gfloat maximum,
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gfloat default_value,
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GParamFlags flags);
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CLUTTER_AVAILABLE_IN_1_0
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void clutter_value_set_units (GValue *value,
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const ClutterUnits *units);
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CLUTTER_AVAILABLE_IN_1_0
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const ClutterUnits * clutter_value_get_units (const GValue *value);
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G_END_DECLS
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#endif /* __CLUTTER_UNITS_H__ */
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