home *** CD-ROM | disk | FTP | other *** search
- /* A general interface to the widgets of different toolkits.
- Copyright (C) 1992, 1993, 1994 Lucid, Inc.
- Copyright (C) 1995 Tinker Systems and INS Engineering Corp.
-
- This file is part of the Lucid Widget Library.
-
- The Lucid Widget Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- The Lucid Widget Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #ifdef NeXT
- #undef __STRICT_BSD__ /* ick */
- #endif
-
- #include <stdlib.h>
- #include <unistd.h>
- #include <sys/types.h>
- #include <string.h>
- #include <stdio.h>
- #include <X11/StringDefs.h>
- #include "lwlib-internal.h"
- #include "lwlib-utils.h"
-
- #if defined(__GNUC__) && !defined(alloca)
- #define alloca __builtin_alloca
- #endif
-
- #if ((!__GNUC__) && !defined(__hpux)) && !defined(_AIX) && !defined (_SCO_DS)
- #include <alloca.h>
- #endif
-
- #ifdef __SUNPRO_C
- void *__builtin_alloca (unsigned int);
- #endif
-
- #if defined(_AIX)
- #pragma alloca
- #endif
-
- #ifdef BROKEN_SUNOS_HEADERS
- extern void * memset (void *, int, int);
- extern int strcasecmp (char *, char *);
- extern int fprintf (FILE *, CONST char *, ...);
- #endif
-
- #ifdef NEED_LUCID
- #include "lwlib-Xlw.h"
- #endif
- #ifdef NEED_MOTIF
- #include "lwlib-Xm.h"
- #endif
- #ifdef NEED_ATHENA
- #include "lwlib-Xaw.h"
- #endif
-
- /* #### Does a check need to be put back in here to make sure we have
- sufficient defines to function properly or are the checks in the
- makefile sufficient? */
-
- /* List of all widgets managed by the library. Note that each "widget"
- listed here may actually be a tree of widgets; for example, a
- single entry here might represent a single menubar or popup menu,
- each of which might be implemented with a tree of widgets.
- */
- static widget_info *all_widget_info = NULL;
-
-
- /* Forward declarations */
- static void
- instantiate_widget_instance (widget_instance *instance);
-
-
- /* utility functions for widget_instance and widget_info */
- static char *
- safe_strdup (CONST char *s)
- {
- char *result;
- if (! s) return 0;
- result = (char *) malloc (strlen (s) + 1);
- if (! result)
- return 0;
- strcpy (result, s);
- return result;
- }
-
- static void
- safe_free_str (char *s)
- {
- if (s) free (s);
- }
-
- static widget_value *widget_value_free_list = 0;
-
- widget_value *
- malloc_widget_value (void)
- {
- widget_value *wv;
- if (widget_value_free_list)
- {
- wv = widget_value_free_list;
- widget_value_free_list = wv->free_list;
- wv->free_list = 0;
- }
- else
- {
- wv = (widget_value *) malloc (sizeof (widget_value));
- }
- if (wv)
- {
- memset (wv, 0, sizeof (widget_value));
- }
- return wv;
- }
-
- /* this is analogous to free(). It frees only what was allocated
- by malloc_widget_value(), and no substructures.
- */
- void
- free_widget_value (widget_value *wv)
- {
- if (wv->free_list)
- abort ();
- wv->free_list = widget_value_free_list;
- widget_value_free_list = wv;
- }
-
- static void free_widget_value_tree (widget_value *wv);
-
- static void
- free_widget_value_contents (widget_value *wv)
- {
- if (wv->name) free (wv->name);
- if (wv->value) free (wv->value);
- if (wv->key) free (wv->key);
-
- /* #### - all of this 0xDEADBEEF stuff should be unnecessary
- in production code... it should be conditionalized. */
- wv->name = wv->value = wv->key = (char *) 0xDEADBEEF;
-
- if (wv->toolkit_data && wv->free_toolkit_data)
- {
- free (wv->toolkit_data);
- wv->toolkit_data = (void *) 0xDEADBEEF;
- }
- if (wv->scrollbar_data)
- {
- free (wv->scrollbar_data);
- wv->scrollbar_data = NULL;
- }
- if (wv->contents && (wv->contents != (widget_value*)1))
- {
- free_widget_value_tree (wv->contents);
- wv->contents = (widget_value *) 0xDEADBEEF;
- }
- if (wv->next)
- {
- free_widget_value_tree (wv->next);
- wv->next = (widget_value *) 0xDEADBEEF;
- }
- }
-
- static void
- free_widget_value_tree (widget_value *wv)
- {
- if (!wv)
- return;
-
- free_widget_value_contents (wv);
- free_widget_value (wv);
- }
-
- static void
- copy_scrollbar_values (widget_value *val, widget_value *copy)
- {
- if (!copy->scrollbar_data)
- copy->scrollbar_data =
- (scrollbar_values *) malloc (sizeof (scrollbar_values));
-
- if (val->scrollbar_data)
- *copy->scrollbar_data = *val->scrollbar_data;
- else
- memset (copy->scrollbar_data, 0, sizeof (scrollbar_values));
- }
-
- /*
- * Return true if old->scrollbar_data were not equivalent
- * to new->scrollbar_data.
- */
- static Boolean
- merge_scrollbar_values (widget_value *old, widget_value *new)
- {
- Boolean changed = False;
-
- if (new->scrollbar_data && !old->scrollbar_data)
- {
- copy_scrollbar_values (new, old);
- changed = True;
- }
- else if (!new->scrollbar_data && old->scrollbar_data)
- {
- free (old->scrollbar_data);
- old->scrollbar_data = NULL;
- }
- else if (new->scrollbar_data && old->scrollbar_data)
- {
- scrollbar_values *old_sb = old->scrollbar_data;
- scrollbar_values *new_sb = new->scrollbar_data;
- #define FROB(field) if (old_sb->field != new_sb->field) changed = True
- FROB (line_increment);
- FROB (page_increment);
- FROB (minimum);
- FROB (maximum);
- FROB (slider_size);
- FROB (slider_position);
- FROB (scrollbar_width);
- FROB (scrollbar_height);
- FROB (scrollbar_x);
- FROB (scrollbar_y);
- #undef FROB
- *old_sb = *new_sb;
- }
-
- return changed;
- }
-
- /* Make a complete copy of a widget_value tree. Store CHANGE into
- the widget_value tree's `change' field. */
-
- static widget_value *
- copy_widget_value_tree (widget_value *val, change_type change)
- {
- widget_value *copy;
-
- if (!val)
- return NULL;
- if (val == (widget_value *) 1)
- return val;
-
- copy = malloc_widget_value ();
- if (copy)
- {
- /* #### - don't seg fault *here* if out of memory. Menus will be
- truncated inexplicably. */
- copy->type = val->type;
- copy->name = safe_strdup (val->name);
- copy->value = safe_strdup (val->value);
- copy->key = safe_strdup (val->key);
- copy->enabled = val->enabled;
- copy->selected = val->selected;
- copy->edited = False;
- copy->change = change;
- copy->contents = copy_widget_value_tree (val->contents, change);
- copy->call_data = val->call_data;
- copy->next = copy_widget_value_tree (val->next, change);
- copy->toolkit_data = NULL;
- copy->free_toolkit_data = False;
- copy_scrollbar_values (val, copy);
- }
- return copy;
- }
-
- /* This function is used to implement incremental menu construction. */
-
- widget_value *
- replace_widget_value_tree (widget_value *node, widget_value *newtree)
- {
- widget_value *copy;
-
- if (!node || !newtree)
- abort ();
-
- copy = copy_widget_value_tree (newtree, STRUCTURAL_CHANGE);
-
- free_widget_value_contents (node);
- *node = *copy;
- free_widget_value (copy); /* free the node, but not its contents. */
- return node;
- }
-
- static widget_info *
- allocate_widget_info (CONST char *type, CONST char *name,
- LWLIB_ID id, widget_value *val,
- lw_callback pre_activate_cb, lw_callback selection_cb,
- lw_callback post_activate_cb)
- {
- widget_info *info = (widget_info *) malloc (sizeof (widget_info));
- info->type = safe_strdup (type);
- info->name = safe_strdup (name);
- info->id = id;
- info->val = copy_widget_value_tree (val, STRUCTURAL_CHANGE);
- info->busy = False;
- info->pre_activate_cb = pre_activate_cb;
- info->selection_cb = selection_cb;
- info->post_activate_cb = post_activate_cb;
- info->instances = NULL;
-
- info->next = all_widget_info;
- all_widget_info = info;
-
- return info;
- }
-
- static void
- free_widget_info (widget_info *info)
- {
- safe_free_str (info->type);
- safe_free_str (info->name);
- free_widget_value_tree (info->val);
- memset ((void*)info, 0xDEADBEEF, sizeof (widget_info));
- free (info);
- }
-
- static void
- mark_widget_destroyed (Widget widget, XtPointer closure, XtPointer call_data)
- {
- widget_instance *instance = (widget_instance*)closure;
-
- /* be very conservative */
- if (instance->widget == widget)
- instance->widget = NULL;
- }
-
- static widget_instance *
- allocate_widget_instance (widget_info *info, Widget parent, Boolean pop_up_p)
- {
- widget_instance *instance =
- (widget_instance *) malloc (sizeof (widget_instance));
- instance->parent = parent;
- instance->pop_up_p = pop_up_p;
- instance->info = info;
- instance->next = info->instances;
- info->instances = instance;
-
- instantiate_widget_instance (instance);
-
- XtAddCallback (instance->widget, XtNdestroyCallback,
- mark_widget_destroyed, (XtPointer)instance);
- return instance;
- }
-
- static void
- free_widget_instance (widget_instance *instance)
- {
- memset ((void *) instance, 0xDEADBEEF, sizeof (widget_instance));
- free (instance);
- }
-
- static widget_info *
- get_widget_info (LWLIB_ID id, Boolean remove_p)
- {
- widget_info *info;
- widget_info *prev;
- for (prev = NULL, info = all_widget_info;
- info;
- prev = info, info = info->next)
- if (info->id == id)
- {
- if (remove_p)
- {
- if (prev)
- prev->next = info->next;
- else
- all_widget_info = info->next;
- }
- return info;
- }
- return NULL;
- }
-
- /* Internal function used by the library dependent implementation to get the
- widget_value for a given widget in an instance */
- widget_info *
- lw_get_widget_info (LWLIB_ID id)
- {
- return get_widget_info (id, 0);
- }
-
- static int
- map_widget_values (widget_value *value, int (*mapfunc) (widget_value *value,
- void *closure),
- void *closure)
- {
- int retval = 0;
-
- if (value->contents)
- retval = map_widget_values (value->contents, mapfunc, closure);
- if (retval)
- return retval;
-
- if (value->next)
- retval = map_widget_values (value->next, mapfunc, closure);
- if (retval)
- return retval;
-
- return (mapfunc) (value, closure);
- }
-
- int
- lw_map_widget_values (LWLIB_ID id, int (*mapfunc) (widget_value *value,
- void *closure),
- void *closure)
- {
- widget_info *info = get_widget_info (id, 0);
-
- if (!info)
- abort ();
-
- if (info->val)
- return map_widget_values (info->val, mapfunc, closure);
- return 0;
- }
-
- static widget_instance *
- get_widget_instance (Widget widget, Boolean remove_p)
- {
- widget_info *info;
- widget_instance *instance;
- widget_instance *prev;
- for (info = all_widget_info; info; info = info->next)
- for (prev = NULL, instance = info->instances;
- instance;
- prev = instance, instance = instance->next)
- if (instance->widget == widget)
- {
- if (remove_p)
- {
- if (prev)
- prev->next = instance->next;
- else
- info->instances = instance->next;
- }
- return instance;
- }
- return (widget_instance *) 0;
- }
-
- static widget_instance*
- find_instance (LWLIB_ID id, Widget parent, Boolean pop_up_p)
- {
- widget_info *info = get_widget_info (id, False);
- widget_instance *instance;
-
- if (info)
- for (instance = info->instances; instance; instance = instance->next)
- if (instance->parent == parent && instance->pop_up_p == pop_up_p)
- return instance;
-
- return NULL;
- }
-
-
- /* utility function for widget_value */
- static Boolean
- safe_strcmp (CONST char *s1, CONST char *s2)
- {
- if (!!s1 ^ !!s2) return True;
- return (s1 && s2) ? strcmp (s1, s2) : s1 ? False : !!s2;
- }
-
- static int
- max (int i1, int i2)
- {
- return i1 > i2 ? i1 : i2;
- }
-
-
- #if 0
- # define EXPLAIN(name, oc, nc, desc, a1, a2) \
- printf ("Change: \"%s\"\tmax(%s=%d,%s=%d)\t%s %d %d\n", \
- name, \
- (oc == NO_CHANGE ? "none" : \
- (oc == INVISIBLE_CHANGE ? "invisible" : \
- (oc == VISIBLE_CHANGE ? "visible" : \
- (oc == STRUCTURAL_CHANGE ? "structural" : "???")))), \
- oc, \
- (nc == NO_CHANGE ? "none" : \
- (nc == INVISIBLE_CHANGE ? "invisible" : \
- (nc == VISIBLE_CHANGE ? "visible" : \
- (nc == STRUCTURAL_CHANGE ? "structural" : "???")))), \
- nc, desc, a1, a2)
- #else
- # define EXPLAIN(name, oc, nc, desc, a1, a2)
- #endif
-
-
- static widget_value *
- merge_widget_value (widget_value *val1, widget_value *val2, int level)
- {
- change_type change;
- widget_value *merged_next;
- widget_value *merged_contents;
-
- if (!val1)
- {
- if (val2)
- return copy_widget_value_tree (val2, STRUCTURAL_CHANGE);
- else
- return NULL;
- }
- if (!val2)
- {
- free_widget_value_tree (val1);
- return NULL;
- }
-
- change = NO_CHANGE;
-
- if (val1->type != val2->type)
- {
- EXPLAIN (val1->name, change, STRUCTURAL_CHANGE, "type change",
- val1->type, val2->type);
- change = max (change, STRUCTURAL_CHANGE);
- val1->type = val2->type;
- }
- if (safe_strcmp (val1->name, val2->name))
- {
- EXPLAIN (val1->name, change, STRUCTURAL_CHANGE, "name change",
- val1->name, val2->name);
- change = max (change, STRUCTURAL_CHANGE);
- safe_free_str (val1->name);
- val1->name = safe_strdup (val2->name);
- }
- if (safe_strcmp (val1->value, val2->value))
- {
- EXPLAIN (val1->name, change, VISIBLE_CHANGE, "value change",
- val1->value, val2->value);
- change = max (change, VISIBLE_CHANGE);
- safe_free_str (val1->value);
- val1->value = safe_strdup (val2->value);
- }
- if (safe_strcmp (val1->key, val2->key))
- {
- EXPLAIN (val1->name, change, VISIBLE_CHANGE, "key change",
- val1->key, val2->key);
- change = max (change, VISIBLE_CHANGE);
- safe_free_str (val1->key);
- val1->key = safe_strdup (val2->key);
- }
- if (val1->enabled != val2->enabled)
- {
- EXPLAIN (val1->name, change, VISIBLE_CHANGE, "enablement change",
- val1->enabled, val2->enabled);
- change = max (change, VISIBLE_CHANGE);
- val1->enabled = val2->enabled;
- }
- if (val1->selected != val2->selected)
- {
- EXPLAIN (val1->name, change, VISIBLE_CHANGE, "selection change",
- val1->selected, val2->selected);
- change = max (change, VISIBLE_CHANGE);
- val1->selected = val2->selected;
- }
- if (val1->call_data != val2->call_data)
- {
- EXPLAIN (val1->name, change, INVISIBLE_CHANGE, "call-data change",
- val1->call_data, val2->call_data);
- change = max (change, INVISIBLE_CHANGE);
- val1->call_data = val2->call_data;
- }
- if (merge_scrollbar_values (val1, val2))
- {
- EXPLAIN (val1->name, change, VISIBLE_CHANGE, "scrollbar change", 0, 0);
- change = max (change, VISIBLE_CHANGE);
- }
-
- if (level > 0)
- {
- merged_contents =
- merge_widget_value (val1->contents, val2->contents, level - 1);
-
- if (val1->contents && !merged_contents)
- {
- EXPLAIN (val1->name, change, INVISIBLE_CHANGE, "(contents gone)",
- 0, 0);
- change = max (change, INVISIBLE_CHANGE);
- }
- else if (merged_contents && merged_contents->change != NO_CHANGE)
- {
- EXPLAIN (val1->name, change, INVISIBLE_CHANGE, "(contents change)",
- 0, 0);
- change = max (change, INVISIBLE_CHANGE);
- }
-
- val1->contents = merged_contents;
- }
-
- merged_next = merge_widget_value (val1->next, val2->next, level);
-
- if (val1->next && !merged_next)
- {
- EXPLAIN (val1->name, change, STRUCTURAL_CHANGE, "(following gone)",
- 0, 0);
- change = max (change, STRUCTURAL_CHANGE);
- }
- else if (merged_next)
- {
- if (merged_next->change)
- {
- EXPLAIN (val1->name, change, merged_next->change, "(following change)",
- 0, 0);
- }
- change = max (change, merged_next->change);
- }
-
- val1->next = merged_next;
-
- val1->change = change;
-
- if (change > NO_CHANGE && val1->toolkit_data)
- {
- if (val1->free_toolkit_data)
- free (val1->toolkit_data);
- val1->toolkit_data = NULL;
- }
-
- return val1;
- }
-
-
- /* modifying the widgets */
- static Widget
- name_to_widget (widget_instance *instance, CONST char *name)
- {
- Widget widget = NULL;
-
- if (!instance->widget)
- return NULL;
-
- if (!strcmp (XtName (instance->widget), name))
- widget = instance->widget;
- else
- {
- int length = strlen (name) + 2;
- char *real_name = (char *) alloca (length);
- real_name [0] = '*';
- strcpy (real_name + 1, name);
-
- widget = XtNameToWidget (instance->widget, real_name);
- }
- return widget;
- }
-
- static void
- set_one_value (widget_instance *instance, widget_value *val, Boolean deep_p)
- {
- Widget widget = name_to_widget (instance, val->name);
-
- if (widget)
- {
- #ifdef NEED_LUCID
- if (lw_lucid_widget_p (instance->widget))
- xlw_update_one_widget (instance, widget, val, deep_p);
- #endif
- #ifdef NEED_MOTIF
- if (lw_motif_widget_p (instance->widget))
- xm_update_one_widget (instance, widget, val, deep_p);
- #endif
- #ifdef NEED_ATHENA
- if (lw_xaw_widget_p (instance->widget))
- xaw_update_one_widget (instance, widget, val, deep_p);
- #endif
- }
- }
-
- static void
- update_one_widget_instance (widget_instance *instance, Boolean deep_p)
- {
- widget_value *val;
-
- if (!instance->widget)
- /* the widget was destroyed */
- return;
-
- for (val = instance->info->val; val; val = val->next)
- if (val->change != NO_CHANGE)
- set_one_value (instance, val, deep_p);
- }
-
- static void
- update_all_widget_values (widget_info *info, Boolean deep_p)
- {
- widget_instance *instance;
- widget_value *val;
-
- for (instance = info->instances; instance; instance = instance->next)
- update_one_widget_instance (instance, deep_p);
-
- for (val = info->val; val; val = val->next)
- val->change = NO_CHANGE;
- }
-
- void
- lw_modify_all_widgets (LWLIB_ID id, widget_value *val, Boolean deep_p)
- {
- widget_info *info = get_widget_info (id, False);
- widget_value *new_val;
- widget_value *next_new_val;
- widget_value *cur;
- widget_value *prev;
- widget_value *next;
- int found;
-
- if (!info)
- return;
-
- for (new_val = val; new_val; new_val = new_val->next)
- {
- next_new_val = new_val->next;
- new_val->next = NULL;
- found = False;
- for (prev = NULL, cur = info->val; cur; prev = cur, cur = cur->next)
- if (!strcmp (cur->name, new_val->name))
- {
- found = True;
- next = cur->next;
- cur->next = NULL;
- cur = merge_widget_value (cur, new_val, deep_p ? 1000 : 1);
- if (prev)
- prev->next = cur ? cur : next;
- else
- info->val = cur ? cur : next;
- if (cur)
- cur->next = next;
- break;
- }
- if (!found)
- {
- /* Could not find it, add it */
- if (prev)
- prev->next = copy_widget_value_tree (new_val, STRUCTURAL_CHANGE);
- else
- info->val = copy_widget_value_tree (new_val, STRUCTURAL_CHANGE);
- }
- new_val->next = next_new_val;
- }
-
- update_all_widget_values (info, deep_p);
- }
-
-
- /* creating the widgets */
-
- static void
- initialize_widget_instance (widget_instance *instance)
- {
- widget_value *val;
-
- for (val = instance->info->val; val; val = val->next)
- val->change = STRUCTURAL_CHANGE;
-
- update_one_widget_instance (instance, True);
-
- for (val = instance->info->val; val; val = val->next)
- val->change = NO_CHANGE;
- }
-
-
- static widget_creation_function
- find_in_table (CONST char *type, widget_creation_entry *table)
- {
- widget_creation_entry *cur;
- for (cur = table; cur->type; cur++)
- if (!strcasecmp (type, cur->type))
- return cur->function;
- return NULL;
- }
-
- static Boolean
- dialog_spec_p (CONST char *name)
- {
- /* return True if name matches [EILPQeilpq][1-9][Bb] or
- [EILPQeilpq][1-9][Bb][Rr][1-9] */
- if (!name)
- return False;
-
- switch (name [0])
- {
- case 'E': case 'I': case 'L': case 'P': case 'Q':
- case 'e': case 'i': case 'l': case 'p': case 'q':
- if (name [1] >= '0' && name [1] <= '9')
- {
- if (name [2] != 'B' && name [2] != 'b')
- return False;
- if (!name [3])
- return True;
- if ((name [3] == 'T' || name [3] == 't') && !name [4])
- return True;
- if ((name [3] == 'R' || name [3] == 'r')
- && name [4] >= '0' && name [4] <= '9' && !name [5])
- return True;
- return False;
- }
- else
- return False;
-
- default:
- return False;
- }
- }
-
- static void
- instantiate_widget_instance (widget_instance *instance)
- {
- widget_creation_function function = NULL;
-
- #ifdef NEED_LUCID
- if (!function)
- function = find_in_table (instance->info->type, xlw_creation_table);
- #endif
- #ifdef NEED_MOTIF
- if (!function)
- function = find_in_table (instance->info->type, xm_creation_table);
- #endif
- #ifdef NEED_ATHENA
- if (!function)
- function = find_in_table (instance->info->type, xaw_creation_table);
- #endif
-
- if (!function)
- {
- if (dialog_spec_p (instance->info->type))
- {
- #ifdef DIALOGS_MOTIF
- if (!function)
- function = xm_create_dialog;
- #endif
- #ifdef DIALOGS_ATHENA
- if (!function)
- function = xaw_create_dialog;
- #endif
- #ifdef DIALOGS_LUCID
- /* not yet (not ever?) */
- #endif
- }
- }
-
- if (!function)
- {
- fprintf (stderr, "No creation function for widget type %s\n",
- instance->info->type);
- abort ();
- }
-
- instance->widget = (*function) (instance);
-
- if (!instance->widget)
- abort ();
-
- /* XtRealizeWidget (instance->widget);*/
- }
-
- void
- lw_register_widget (CONST char *type, CONST char *name,
- LWLIB_ID id, widget_value *val,
- lw_callback pre_activate_cb, lw_callback selection_cb,
- lw_callback post_activate_cb)
- {
- if (!get_widget_info (id, False))
- allocate_widget_info (type, name, id, val, pre_activate_cb, selection_cb,
- post_activate_cb);
- }
-
- Widget
- lw_get_widget (LWLIB_ID id, Widget parent, Boolean pop_up_p)
- {
- widget_instance *instance;
-
- instance = find_instance (id, parent, pop_up_p);
- return instance ? instance->widget : NULL;
- }
-
- Widget
- lw_make_widget (LWLIB_ID id, Widget parent, Boolean pop_up_p)
- {
- widget_instance *instance;
- widget_info *info;
-
- instance = find_instance (id, parent, pop_up_p);
- if (!instance)
- {
- info = get_widget_info (id, False);
- if (!info)
- return NULL;
- instance = allocate_widget_instance (info, parent, pop_up_p);
- initialize_widget_instance (instance);
- }
- if (!instance->widget)
- abort ();
- return instance->widget;
- }
-
- Widget
- lw_create_widget (CONST char *type, CONST char *name,
- LWLIB_ID id, widget_value *val,
- Widget parent, Boolean pop_up_p, lw_callback pre_activate_cb,
- lw_callback selection_cb, lw_callback post_activate_cb)
- {
- lw_register_widget (type, name, id, val, pre_activate_cb, selection_cb,
- post_activate_cb);
- return lw_make_widget (id, parent, pop_up_p);
- }
-
-
- /* destroying the widgets */
- static void
- destroy_one_instance (widget_instance *instance)
- {
- /* Remove the destroy callback on the widget; that callback will try to
- dereference the instance object (to set its widget slot to 0, since the
- widget is dead.) Since the instance is now dead, we don't have to worry
- about the fact that its widget is dead too.
-
- This happens in the Phase2Destroy of the widget, so this callback would
- not have been run until arbitrarily long after the instance was freed.
- */
- if (instance->widget)
- XtRemoveCallback (instance->widget, XtNdestroyCallback,
- mark_widget_destroyed, (XtPointer)instance);
-
- if (instance->widget)
- {
- /* The else are pretty tricky here, including the empty statement
- at the end because it would be very bad to destroy a widget
- twice. */
- #ifdef NEED_LUCID
- if (lw_lucid_widget_p (instance->widget))
- xlw_destroy_instance (instance);
- else
- #endif
- #ifdef NEED_MOTIF
- if (lw_motif_widget_p (instance->widget))
- xm_destroy_instance (instance);
- else
- #endif
- #ifdef NEED_ATHENA
- if (lw_xaw_widget_p (instance->widget))
- xaw_destroy_instance (instance);
- else
- #endif
- {
- /* do not remove the empty statement */
- ;
- }
- }
-
- free_widget_instance (instance);
- }
-
- void
- lw_destroy_widget (Widget w)
- {
- widget_instance *instance = get_widget_instance (w, True);
-
- if (instance)
- {
- widget_info *info = instance->info;
- /* instance has already been removed from the list; free it */
- destroy_one_instance (instance);
- /* if there are no instances left, free the info too */
- if (!info->instances)
- lw_destroy_all_widgets (info->id);
- }
- }
-
- void
- lw_destroy_all_widgets (LWLIB_ID id)
- {
- widget_info *info = get_widget_info (id, True);
- widget_instance *instance;
- widget_instance *next;
-
- if (info)
- {
- for (instance = info->instances; instance; )
- {
- next = instance->next;
- destroy_one_instance (instance);
- instance = next;
- }
- free_widget_info (info);
- }
- }
-
- void
- lw_destroy_everything ()
- {
- while (all_widget_info)
- lw_destroy_all_widgets (all_widget_info->id);
- }
-
- void
- lw_destroy_all_pop_ups ()
- {
- widget_info *info;
- widget_info *next;
- widget_instance *instance;
-
- for (info = all_widget_info; info; info = next)
- {
- next = info->next;
- instance = info->instances;
- if (instance && instance->pop_up_p)
- lw_destroy_all_widgets (info->id);
- }
- }
-
- Widget
- lw_raise_all_pop_up_widgets (void)
- {
- widget_info *info;
- widget_instance *instance;
- Widget result = NULL;
-
- for (info = all_widget_info; info; info = info->next)
- for (instance = info->instances; instance; instance = instance->next)
- if (instance->pop_up_p)
- {
- Widget widget = instance->widget;
- if (widget)
- {
- if (XtIsManaged (widget)
- #ifdef NEED_MOTIF
- /* What a complete load of crap!!!!
- When a dialogShell is on the screen, it is not managed!
- */
- || (lw_motif_widget_p (instance->widget) &&
- XtIsManaged (first_child (widget)))
- #endif
- )
- {
- if (!result)
- result = widget;
- XMapRaised (XtDisplay (widget), XtWindow (widget));
- }
- }
- }
- return result;
- }
-
- static void
- lw_pop_all_widgets (LWLIB_ID id, Boolean up)
- {
- widget_info *info = get_widget_info (id, False);
- widget_instance *instance;
-
- if (info)
- for (instance = info->instances; instance; instance = instance->next)
- if (instance->pop_up_p && instance->widget)
- {
- #ifdef NEED_LUCID
- if (lw_lucid_widget_p (instance->widget))
- {
- XtRealizeWidget (instance->widget);
- xlw_pop_instance (instance, up);
- }
- #endif
- #ifdef NEED_MOTIF
- if (lw_motif_widget_p (instance->widget))
- {
- XtRealizeWidget (instance->widget);
- xm_pop_instance (instance, up);
- }
- #endif
- #ifdef NEED_ATHENA
- if (lw_xaw_widget_p (instance->widget))
- {
- XtRealizeWidget (XtParent (instance->widget));
- XtRealizeWidget (instance->widget);
- xaw_pop_instance (instance, up);
- }
- #endif
- }
- }
-
- void
- lw_pop_up_all_widgets (LWLIB_ID id)
- {
- lw_pop_all_widgets (id, True);
- }
-
- void
- lw_pop_down_all_widgets (LWLIB_ID id)
- {
- lw_pop_all_widgets (id, False);
- }
-
- void
- lw_popup_menu (Widget widget, XEvent *event)
- {
- #ifdef NEED_LUCID
- if (lw_lucid_widget_p (widget))
- xlw_popup_menu (widget, event);
- #endif
- #ifdef NEED_MOTIF
- if (lw_motif_widget_p (widget))
- xm_popup_menu (widget, event);
- #endif
- #ifdef NEED_ATHENA
- if (lw_xaw_widget_p (widget))
- xaw_popup_menu (widget, event); /* not implemented */
- #endif
- }
-
- /* get the values back */
- static Boolean
- get_one_value (widget_instance *instance, widget_value *val)
- {
- Widget widget = name_to_widget (instance, val->name);
-
- if (widget)
- {
- #ifdef NEED_LUCID
- if (lw_lucid_widget_p (instance->widget))
- xlw_update_one_value (instance, widget, val);
- #endif
- #ifdef NEED_MOTIF
- if (lw_motif_widget_p (instance->widget))
- xm_update_one_value (instance, widget, val);
- #endif
- #ifdef NEED_ATHENA
- if (lw_xaw_widget_p (instance->widget))
- xaw_update_one_value (instance, widget, val);
- #endif
- return True;
- }
- else
- return False;
- }
-
- Boolean
- lw_get_some_values (LWLIB_ID id, widget_value *val_out)
- {
- widget_info *info = get_widget_info (id, False);
- widget_instance *instance;
- widget_value *val;
- Boolean result = False;
-
- if (!info)
- return False;
-
- instance = info->instances;
- if (!instance)
- return False;
-
- for (val = val_out; val; val = val->next)
- if (get_one_value (instance, val))
- result = True;
-
- return result;
- }
-
- widget_value*
- lw_get_all_values (LWLIB_ID id)
- {
- widget_info *info = get_widget_info (id, False);
- widget_value *val = info->val;
- if (lw_get_some_values (id, val))
- return val;
- else
- return NULL;
- }
-
- /* internal function used by the library dependent implementation to get the
- widget_value for a given widget in an instance */
- widget_value*
- lw_get_widget_value_for_widget (widget_instance *instance, Widget w)
- {
- char *name = XtName (w);
- widget_value *cur;
- for (cur = instance->info->val; cur; cur = cur->next)
- if (!strcmp (cur->name, name))
- return cur;
- return NULL;
- }
-
-
- /* update other instances value when one thing changed */
- /* This function can be used as a an XtCallback for the widgets that get
- modified to update other instances of the widgets. Closure should be the
- widget_instance. */
- void
- lw_internal_update_other_instances (Widget widget, XtPointer closure,
- XtPointer call_data)
- {
- /* To forbid recursive calls */
- static Boolean updating;
-
- widget_instance *instance = (widget_instance*)closure;
- char *name = XtName (widget);
- widget_info *info;
- widget_instance *cur;
- widget_value *val;
-
- /* never recurse as this could cause infinite recursions. */
- if (updating)
- return;
-
- /* protect against the widget being destroyed */
- if (XtWidgetBeingDestroyedP (widget))
- return;
-
- /* Return immediately if there are no other instances */
- info = instance->info;
- if (!info->instances->next)
- return;
-
- updating = True;
-
- for (val = info->val; val && strcmp (val->name, name); val = val->next);
-
- if (val && get_one_value (instance, val))
- for (cur = info->instances; cur; cur = cur->next)
- if (cur != instance)
- set_one_value (cur, val, True);
-
- updating = False;
- }
-
-
-
- /* get the id */
-
- LWLIB_ID
- lw_get_widget_id (Widget w)
- {
- widget_instance *instance = get_widget_instance (w, False);
-
- return instance ? instance->info->id : 0;
- }
-
-
- /* set the keyboard focus */
- void
- lw_set_keyboard_focus (Widget parent, Widget w)
- {
- #ifdef NEED_MOTIF
- xm_set_keyboard_focus (parent, w);
- #else
- XtSetKeyboardFocus (parent, w);
- #endif
- }
-
-
- /* Show busy */
- static void
- show_one_widget_busy (Widget w, Boolean flag)
- {
- Pixel foreground = 0;
- Pixel background = 1;
- Widget widget_to_invert = XtNameToWidget (w, "*sheet");
- if (!widget_to_invert)
- widget_to_invert = w;
-
- XtVaGetValues (widget_to_invert,
- XtNforeground, &foreground,
- XtNbackground, &background,
- 0);
- XtVaSetValues (widget_to_invert,
- XtNforeground, background,
- XtNbackground, foreground,
- 0);
- }
-
- void
- lw_show_busy (Widget w, Boolean busy)
- {
- widget_instance *instance = get_widget_instance (w, False);
- widget_info *info;
- widget_instance *next;
-
- if (instance)
- {
- info = instance->info;
- if (info->busy != busy)
- {
- for (next = info->instances; next; next = next->next)
- if (next->widget)
- show_one_widget_busy (next->widget, busy);
- info->busy = busy;
- }
- }
- }
-