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annotate lwlib/lwlib-internal.h @ 4975:c5cb3cb79110

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author Ben Wing <ben@xemacs.org>
date Fri, 05 Feb 2010 04:27:45 -0600
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1 /* Implementation-specific definitions for the Lucid Widget Library.
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2 Copyright (C) 1992 Lucid, Inc.
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3 Copyright (C) 2000 Ben Wing.
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4
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5 This file is part of the Lucid Widget Library.
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6
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7 The Lucid Widget Library is free software; you can redistribute it and/or
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8 modify it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 1, or (at your option)
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10 any later version.
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11
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12 The Lucid Widget Library is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor,
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20 Boston, MA 02110-1301, USA. */
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21
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22 #ifndef INCLUDED_lwlib_internal_h_
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23 #define INCLUDED_lwlib_internal_h_
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24
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25 #include "lwlib.h"
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26
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27 #ifdef USE_ASSERTIONS
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28 /* Highly dubious kludge */
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29 /* (thanks, Jamie, I feel better now -- ben) */
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30 EXTERN_C void assert_failed (const char *, int, const char *);
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31 # define abort() (assert_failed (__FILE__, __LINE__, "abort()"))
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32 # define assert(x) ((x) ? (void) 0 : assert_failed (__FILE__, __LINE__, #x))
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33 #else
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34 # ifdef DEBUG_XEMACS
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35 # define assert(x) ((x) ? (void) 0 : (void) abort ())
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36 # else
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37 # define assert(x) ((void) 0)
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38 # endif
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39 #endif
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40
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41 /* This represents a single widget within a widget tree. All the
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42 widgets in a widget tree are chained through the `next' field.
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43 `info' is a back pointer to the widget tree. */
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44
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45 typedef struct _widget_instance
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46 {
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47 Widget widget;
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48 Widget parent;
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49 Boolean pop_up_p;
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50 struct _widget_info* info;
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51 struct _widget_instance* next;
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52 } widget_instance;
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53
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54 /* This represents a single widget tree, such as a single menubar.
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55 The global variable `all_widget_info' lists all widget trees,
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56 chained through the `next' field of this structure. */
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57
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58 typedef struct _widget_info
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59 {
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60 char* type;
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61 char* name;
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62 LWLIB_ID id;
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63 widget_value* val;
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64 Boolean busy;
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65 lw_callback pre_activate_cb;
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66 lw_callback selection_cb;
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67 lw_callback post_activate_cb;
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68 struct _widget_instance* instances;
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69 struct _widget_info* next;
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70 } widget_info;
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71
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72 typedef Widget
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73 (*widget_creation_function) (widget_instance* instance);
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74
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75 typedef struct _widget_creation_entry
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76 {
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77 const char* type;
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78 widget_creation_function function;
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79 } widget_creation_entry;
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80
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81 /* update all other instances of a widget. Can be used in a callback when
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82 a widget has been used by the user */
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83 void
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84 lw_internal_update_other_instances (Widget widget, XtPointer closure,
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85 XtPointer call_data);
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86
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87 /* get the widget_value for a widget in a given instance */
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88 widget_value*
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89 lw_get_widget_value_for_widget (widget_instance* instance, Widget w);
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90
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91 widget_info *lw_get_widget_info (LWLIB_ID id);
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92
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93 #endif /* INCLUDED_lwlib_internal_h_ */