atk/atkcomponent.h

   1 /* ATK -  Accessibility Toolkit
   2  * Copyright 2001 Sun Microsystems Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifndef __ATK_COMPONENT_H__
  21 #define __ATK_COMPONENT_H__
  22
  23 #if defined(ATK_DISABLE_SINGLE_INCLUDES) && !defined (__ATK_H_INSIDE__) && !defined (ATK_COMPILATION)
  24 #error "Only <atk/atk.h> can be included directly."
  25 #endif
  26
  27 #include <atk/atkobject.h>
  28 #include <atk/atkutil.h>
  29
  30 G_BEGIN_DECLS
  31
  32 /**
  33  *AtkScrollType:
  34  *@ATK_SCROLL_TOP_LEFT: Scroll the object vertically and horizontally to the top
  35  *left corner of the window.
  36  *@ATK_SCROLL_BOTTOM_RIGHT: Scroll the object vertically and horizontally to the
  37  *bottom right corner of the window.
  38  *@ATK_SCROLL_TOP_EDGE: Scroll the object vertically to the top edge of the
  39  window.
  40  *@ATK_SCROLL_BOTTOM_EDGE: Scroll the object vertically to the bottom edge of
  41  *the window.
  42  *@ATK_SCROLL_LEFT_EDGE: Scroll the object vertically and horizontally to the
  43  *left edge of the window.
  44  *@ATK_SCROLL_RIGHT_EDGE: Scroll the object vertically and horizontally to the
  45  *right edge of the window.
  46  *@ATK_SCROLL_ANYWHERE: Scroll the object vertically and horizontally so that
  47  *as much as possible of the object becomes visible. The exact placement is
  48  *determined by the application.
  49  *
  50  * Specifies where an object should be placed on the screen when using scroll_to.
  51  *
  52  * Since: 2.30
  53  **/
  54 typedef enum {
  55   ATK_SCROLL_TOP_LEFT,
  56   ATK_SCROLL_BOTTOM_RIGHT,
  57   ATK_SCROLL_TOP_EDGE,
  58   ATK_SCROLL_BOTTOM_EDGE,
  59   ATK_SCROLL_LEFT_EDGE,
  60   ATK_SCROLL_RIGHT_EDGE,
  61   ATK_SCROLL_ANYWHERE
  62 } AtkScrollType;
  63
  64 /*
  65  * The AtkComponent interface should be supported by any object that is
  66  * rendered on the screen. The interface provides the standard mechanism
  67  * for an assistive technology to determine and set the graphical
  68  * representation of an object.
  69  */
  70
  71 #define ATK_TYPE_COMPONENT                    (atk_component_get_type ())
  72 #define ATK_IS_COMPONENT(obj)                 G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATK_TYPE_COMPONENT)
  73 #define ATK_COMPONENT(obj)                    G_TYPE_CHECK_INSTANCE_CAST ((obj), ATK_TYPE_COMPONENT, AtkComponent)
  74 #define ATK_COMPONENT_GET_IFACE(obj)          (G_TYPE_INSTANCE_GET_INTERFACE ((obj), ATK_TYPE_COMPONENT, AtkComponentIface))
  75
  76 #ifndef _TYPEDEF_ATK_COMPONENT_
  77 #define _TYPEDEF_ATK_COMPONENT_
  78 typedef struct _AtkComponent AtkComponent;
  79 #endif
  80 typedef struct _AtkComponentIface  AtkComponentIface;
  81
  82 /**
  83  * AtkFocusHandler:
  84  * @object: the #AtkObject that receives/lose the focus
  85  * @focus_in: TRUE if the object receives the focus
  86  *
  87  * The type of callback function used for
  88  * atk_component_add_focus_handler() and
  89  * atk_component_remove_focus_handler()
  90  *
  91  * Deprecated: 2.9.4: Deprecated with atk_component_add_focus_handler()
  92  * and atk_component_remove_focus_handler(). See those
  93  * methods for more information.
  94  */
  95 typedef void (*AtkFocusHandler) (AtkObject* object, gboolean focus_in);
  96
  97 typedef struct _AtkRectangle       AtkRectangle;
  98
  99 /**
 100  * AtkRectangle:
 101  * @x: X coordinate of the left side of the rectangle.
 102  * @y: Y coordinate of the top side of the rectangle.
 103  * @width: width of the rectangle.
 104  * @height: height of the rectangle.
 105  *
 106  * A data structure for holding a rectangle. Those coordinates are
 107  * relative to the component top-level parent.
 108  */
 109 struct _AtkRectangle
 110 {
 111   gint x;
 112   gint y;
 113   gint width;
 114   gint height;
 115 };
 116
 117 ATK_AVAILABLE_IN_ALL
 118 GType atk_rectangle_get_type (void);
 119
 120 #define ATK_TYPE_RECTANGLE (atk_rectangle_get_type ())
 121
 122 /**
 123  * AtkComponentIface:
 124  * @add_focus_handler: This virtual function is deprecated since 2.9.4
 125  * and it should not be overriden. See
 126  * atk_component_add_focus_handler() for more information.
 127  * @get_position: This virtual function is deprecated since 2.12 and
 128  * it should not be overriden. Use @get_extents instead.
 129  * @get_size: This virtual function is deprecated since 2.12 and it
 130  * should not be overriden. Use @get_extents instead.
 131  * @remove_focus_handler: This virtual function is deprecated since
 132  * 2.9.4 and it should not be overriden. See
 133  * atk_component_remove_focus_handler() for more information.
 134  */
 135
 136 struct _AtkComponentIface
 137 {
 138   GTypeInterface parent;
 139
 140   guint          (* add_focus_handler)  (AtkComponent          *component,
 141                                          AtkFocusHandler        handler);
 142
 143   gboolean       (* contains)           (AtkComponent          *component,
 144                                          gint                   x,
 145                                          gint                   y,
 146                                          AtkCoordType           coord_type);
 147
 148   AtkObject*    (* ref_accessible_at_point)  (AtkComponent     *component,
 149                                          gint                   x,
 150                                          gint                   y,
 151                                          AtkCoordType           coord_type);
 152   void          (* get_extents)         (AtkComponent          *component,
 153                                          gint                  *x,
 154                                          gint                  *y,
 155                                          gint                  *width,
 156                                          gint                  *height,
 157                                          AtkCoordType          coord_type);
 158   void                     (* get_position)     (AtkComponent   *component,
 159                                                  gint           *x,
 160                                                  gint           *y,
 161                                                  AtkCoordType   coord_type);
 162   void                     (* get_size)                 (AtkComponent   *component,
 163                                                          gint           *width,
 164                                                          gint           *height);
 165   gboolean                 (* grab_focus)               (AtkComponent   *component);
 166   void                     (* remove_focus_handler)      (AtkComponent  *component,
 167                                                           guint         handler_id);
 168   gboolean                 (* set_extents)      (AtkComponent   *component,
 169                                                  gint           x,
 170                                                  gint           y,
 171                                                  gint           width,
 172                                                  gint           height,
 173                                                  AtkCoordType   coord_type);
 174   gboolean                 (* set_position)     (AtkComponent   *component,
 175                                                  gint           x,
 176                                                  gint           y,
 177                                                  AtkCoordType   coord_type);
 178   gboolean                 (* set_size)         (AtkComponent   *component,
 179                                                  gint           width,
 180                                                  gint           height);
 181
 182   AtkLayer                 (* get_layer)        (AtkComponent   *component);
 183   gint                     (* get_mdi_zorder)   (AtkComponent   *component);
 184
 185   /*
 186    * signal handlers
 187    */
 188   void                     (* bounds_changed)   (AtkComponent   *component,
 189                                                  AtkRectangle   *bounds);
 190   gdouble                  (* get_alpha)        (AtkComponent   *component);
 191
 192   /*
 193    * Scrolls this object so it becomes visible on the screen.
 194    * Since ATK 2.30
 195    */
 196   gboolean                (*scroll_to)          (AtkComponent   *component,
 197                                                  AtkScrollType   type);
 198
 199   gboolean                (*scroll_to_point)    (AtkComponent   *component,
 200                                                  AtkCoordType    coords,
 201                                                  gint            x,
 202                                                  gint            y);
 203 };
 204
 205 ATK_AVAILABLE_IN_ALL
 206 GType atk_component_get_type (void);
 207
 208 /* convenience functions */
 209 ATK_DEPRECATED_IN_2_10
 210 guint                atk_component_add_focus_handler      (AtkComponent    *component,
 211                                                            AtkFocusHandler handler);
 212 ATK_AVAILABLE_IN_ALL
 213 gboolean              atk_component_contains               (AtkComponent    *component,
 214                                                             gint            x,
 215                                                             gint            y,
 216                                                             AtkCoordType    coord_type);
 217 ATK_AVAILABLE_IN_ALL
 218 AtkObject*            atk_component_ref_accessible_at_point(AtkComponent    *component,
 219                                                             gint            x,
 220                                                             gint            y,
 221                                                             AtkCoordType    coord_type);
 222 ATK_AVAILABLE_IN_ALL
 223 void                  atk_component_get_extents            (AtkComponent    *component,
 224                                                             gint            *x,
 225                                                             gint            *y,
 226                                                             gint            *width,
 227                                                             gint            *height,
 228                                                             AtkCoordType    coord_type);
 229 ATK_DEPRECATED_IN_2_12_FOR(atk_component_get_extents)
 230 void                  atk_component_get_position           (AtkComponent    *component,
 231                                                             gint            *x,
 232                                                             gint            *y,
 233                                                             AtkCoordType    coord_type);
 234 ATK_DEPRECATED_IN_2_12_FOR(atk_component_get_extents)
 235 void                  atk_component_get_size               (AtkComponent    *component,
 236                                                             gint            *width,
 237                                                             gint            *height);
 238 ATK_AVAILABLE_IN_ALL
 239 AtkLayer              atk_component_get_layer              (AtkComponent    *component);
 240 ATK_AVAILABLE_IN_ALL
 241 gint                  atk_component_get_mdi_zorder         (AtkComponent    *component);
 242 ATK_AVAILABLE_IN_ALL
 243 gboolean              atk_component_grab_focus             (AtkComponent    *component);
 244 ATK_DEPRECATED_IN_2_10
 245 void                  atk_component_remove_focus_handler   (AtkComponent    *component,
 246                                                             guint           handler_id);
 247 ATK_AVAILABLE_IN_ALL
 248 gboolean              atk_component_set_extents            (AtkComponent    *component,
 249                                                             gint            x,
 250                                                             gint            y,
 251                                                             gint            width,
 252                                                             gint            height,
 253                                                             AtkCoordType    coord_type);
 254 ATK_AVAILABLE_IN_ALL
 255 gboolean              atk_component_set_position           (AtkComponent    *component,
 256                                                             gint            x,
 257                                                             gint            y,
 258                                                             AtkCoordType    coord_type);
 259 ATK_AVAILABLE_IN_ALL
 260 gboolean              atk_component_set_size               (AtkComponent    *component,
 261                                                             gint            width,
 262                                                             gint            height);
 263 ATK_AVAILABLE_IN_ALL
 264 gdouble               atk_component_get_alpha              (AtkComponent    *component);
 265
 266 ATK_AVAILABLE_IN_2_30
 267 gboolean              atk_component_scroll_to              (AtkComponent    *component,
 268                                                             AtkScrollType   type);
 269
 270 ATK_AVAILABLE_IN_2_30
 271 gboolean              atk_component_scroll_to_point        (AtkComponent    *component,
 272                                                             AtkCoordType    coords,
 273                                                             gint            x,
 274                                                             gint            y);
 275
 276 G_END_DECLS
 277
 278 #endif /* __ATK_COMPONENT_H__ */