Pileus Git - ~andy/gtk/blob - gtk/gtkcellareacontext.h

   1 /* gtkcellareacontext.h
   2  *
   3  * Copyright (C) 2010 Openismus GmbH
   4  *
   5  * Authors:
   6  *      Tristan Van Berkom <tristanvb@openismus.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public
  19  * License along with this library; if not, write to the
  20  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21  * Boston, MA 02111-1307, USA.
  22  */
  23
  24 #if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
  25 #error "Only <gtk/gtk.h> can be included directly."
  26 #endif
  27
  28 #ifndef __GTK_CELL_AREA_CONTEXT_H__
  29 #define __GTK_CELL_AREA_CONTEXT_H__
  30
  31 #include <gtk/gtkcellarea.h>
  32
  33 G_BEGIN_DECLS
  34
  35 #define GTK_TYPE_CELL_AREA_CONTEXT            (gtk_cell_area_context_get_type ())
  36 #define GTK_CELL_AREA_CONTEXT(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_CELL_AREA_CONTEXT, GtkCellAreaContext))
  37 #define GTK_CELL_AREA_CONTEXT_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_CELL_AREA_CONTEXT, GtkCellAreaContextClass))
  38 #define GTK_IS_CELL_AREA_CONTEXT(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_CELL_AREA_CONTEXT))
  39 #define GTK_IS_CELL_AREA_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_CELL_AREA_CONTEXT))
  40 #define GTK_CELL_AREA_CONTEXT_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CELL_AREA_CONTEXT, GtkCellAreaContextClass))
  41
  42 typedef struct _GtkCellAreaContextPrivate       GtkCellAreaContextPrivate;
  43 typedef struct _GtkCellAreaContextClass         GtkCellAreaContextClass;
  44
  45 struct _GtkCellAreaContext
  46 {
  47   /*< private >*/
  48   GObject parent_instance;
  49
  50   GtkCellAreaContextPrivate *priv;
  51 };
  52
  53 /**
  54  * GtkCellAreaContextClass:
  55  * @allocate: This tells the context that an allocation width or height (or both)
  56  * have been decided for a group of rows. The context should store any allocations
  57  * for internally aligned cells at this point so that they dont need to be
  58  * recalculated at gtk_cell_area_render() time.
  59  * @reset: Clear any previously stored information about requested and allocated
  60  * sizes for the context.
  61  */
  62 struct _GtkCellAreaContextClass
  63 {
  64   /*< private >*/
  65   GObjectClass parent_class;
  66
  67   /*< public >*/
  68   void    (* allocate)                       (GtkCellAreaContext *context,
  69                                               gint                width,
  70                                               gint                height);
  71   void    (* reset)                          (GtkCellAreaContext *context);
  72   void    (* get_preferred_height_for_width) (GtkCellAreaContext *context,
  73                                               gint                width,
  74                                               gint               *minimum_height,
  75                                               gint               *natural_height);
  76   void    (* get_preferred_width_for_height) (GtkCellAreaContext *context,
  77                                               gint                height,
  78                                               gint               *minimum_width,
  79                                               gint               *natural_width);
  80
  81   /*< private >*/
  82   /* Padding for future expansion */
  83   void (*_gtk_reserved1) (void);
  84   void (*_gtk_reserved2) (void);
  85   void (*_gtk_reserved3) (void);
  86   void (*_gtk_reserved4) (void);
  87 };
  88
  89 GType        gtk_cell_area_context_get_type              (void) G_GNUC_CONST;
  90
  91 /* Main apis */
  92 GtkCellArea *gtk_cell_area_context_get_area                        (GtkCellAreaContext *context);
  93 void         gtk_cell_area_context_allocate                        (GtkCellAreaContext *context,
  94                                                                     gint                width,
  95                                                                     gint                height);
  96 void         gtk_cell_area_context_reset                           (GtkCellAreaContext *context);
  97
  98 /* Apis for GtkCellArea clients to consult cached values for a series of GtkTreeModel rows */
  99 void         gtk_cell_area_context_get_preferred_width            (GtkCellAreaContext *context,
 100                                                                    gint               *minimum_width,
 101                                                                    gint               *natural_width);
 102 void         gtk_cell_area_context_get_preferred_height           (GtkCellAreaContext *context,
 103                                                                    gint               *minimum_height,
 104                                                                    gint               *natural_height);
 105 void         gtk_cell_area_context_get_preferred_height_for_width (GtkCellAreaContext *context,
 106                                                                    gint                width,
 107                                                                    gint               *minimum_height,
 108                                                                    gint               *natural_height);
 109 void         gtk_cell_area_context_get_preferred_width_for_height (GtkCellAreaContext *context,
 110                                                                    gint                height,
 111                                                                    gint               *minimum_width,
 112                                                                    gint               *natural_width);
 113 void         gtk_cell_area_context_get_allocation                 (GtkCellAreaContext *context,
 114                                                                    gint               *width,
 115                                                                    gint               *height);
 116
 117 /* Apis for GtkCellArea implementations to update cached values for multiple GtkTreeModel rows */
 118 void         gtk_cell_area_context_push_preferred_width  (GtkCellAreaContext *context,
 119                                                           gint                minimum_width,
 120                                                           gint                natural_width);
 121 void         gtk_cell_area_context_push_preferred_height (GtkCellAreaContext *context,
 122                                                           gint                minimum_height,
 123                                                           gint                natural_height);
 124
 125 G_END_DECLS
 126
 127 #endif /* __GTK_CELL_AREA_CONTEXT_H__ */