Mercurial > hg > xemacs-beta
annotate lwlib/lwlib-utils.c @ 5585:86d6adeb1cf4
Refactor check for Xaw3d.
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Fri, 14 Oct 2011 03:54:46 +0900 |
| parents | ade4c7e2c6cb |
| children |
| rev | line source |
|---|---|
| 428 | 1 /* Defines some widget utility functions. |
| 2 Copyright (C) 1992 Lucid, Inc. | |
| 3 | |
| 4 This file is part of the Lucid Widget Library. | |
| 5 | |
|
5422
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
6 The Lucid Widget Library is free software: you can redistribute it |
|
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
7 and/or modify it under the terms of the GNU General Public License as |
|
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
8 published by the Free Software Foundation, either version 3 of the |
|
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
9 License, or (at your option) any later version. |
| 428 | 10 |
|
5422
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
11 The Lucid Widget Library is distributed in the hope that it will be |
|
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
12 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
14 General Public License for more details. |
| 428 | 15 |
| 16 You should have received a copy of the GNU General Public License | |
|
5422
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
17 along with the Lucid Widget Library. If not, see |
|
ade4c7e2c6cb
Migrate lwlib/ to GPLv3.
Mike Sperber <sperber@deinprogramm.de>
parents:
2286
diff
changeset
|
18 <http://www.gnu.org/licenses/>. */ |
| 428 | 19 |
| 20 #include <config.h> | |
| 21 #include <stdlib.h> | |
| 22 #include <string.h> | |
| 23 #include <memory.h> | |
| 24 #ifdef HAVE_UNISTD_H | |
| 25 #include <unistd.h> | |
| 26 #endif | |
| 27 | |
| 28 #include <X11/Xatom.h> | |
| 29 #include <X11/IntrinsicP.h> | |
| 30 #include <X11/ObjectP.h> | |
| 31 #include "lwlib-utils.h" | |
| 32 | |
| 33 void | |
| 34 destroy_all_children (Widget widget) | |
| 35 { | |
| 36 Widget* children; | |
| 37 unsigned int number; | |
| 38 int i; | |
| 39 | |
| 40 children = XtCompositeChildren (widget, &number); | |
| 41 if (children) | |
| 42 { | |
| 43 /* Unmanage all children and destroy them. They will only be | |
| 44 * really destroyed when we get out of DispatchEvent. */ | |
| 487 | 45 for (i = 0; i < (int) number; i++) |
| 428 | 46 { |
| 47 Widget child = children [i]; | |
| 48 if (!child->core.being_destroyed) | |
| 49 { | |
| 50 XtUnmanageChild (child); | |
| 51 XtDestroyWidget (child); | |
| 52 } | |
| 53 } | |
| 54 XtFree ((char *) children); | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 /* Redisplay the contents of the widget, without first clearing it. */ | |
| 59 void | |
| 60 XtNoClearRefreshWidget (Widget widget) | |
| 61 { | |
| 62 XEvent event; | |
| 63 XExposeEvent* ev = &event.xexpose; | |
| 64 | |
| 65 ev->type = Expose; | |
| 66 ev->serial = 0; | |
| 67 ev->send_event = 0; | |
| 68 ev->display = XtDisplay (widget); | |
| 69 ev->window = XtWindow (widget); | |
| 70 ev->x = 0; | |
| 71 ev->y = 0; | |
| 72 ev->width = widget->core.width; | |
| 73 ev->height = widget->core.height; | |
| 74 ev->count = 0; | |
| 75 | |
| 76 (*widget->core.widget_class->core_class.expose) | |
| 77 (widget, &event, (Region)NULL); | |
| 78 } | |
| 79 | |
| 80 | |
| 81 /* | |
| 82 * Apply a function to all the subwidgets of a given widget recursively. | |
| 83 */ | |
| 84 void | |
| 85 XtApplyToWidgets (Widget w, XtApplyToWidgetsProc proc, XtPointer arg) | |
| 86 { | |
| 87 if (XtIsComposite (w)) | |
| 88 { | |
| 89 CompositeWidget cw = (CompositeWidget) w; | |
| 90 /* We have to copy the children list before mapping over it, because | |
| 91 the procedure might add/delete elements, which would lose badly. */ | |
| 92 int nkids = cw->composite.num_children; | |
| 93 Widget *kids = (Widget *) malloc (sizeof (Widget) * nkids); | |
| 94 int i; | |
| 95 memcpy (kids, cw->composite.children, sizeof (Widget) * nkids); | |
| 96 for (i = 0; i < nkids; i++) | |
| 97 /* This prevent us from using gadgets, why is it here? */ | |
| 98 /* if (XtIsWidget (kids [i])) */ | |
| 99 { | |
| 100 /* do the kiddies first in case we're destroying */ | |
| 101 XtApplyToWidgets (kids [i], proc, arg); | |
| 102 proc (kids [i], arg); | |
| 103 } | |
| 104 free (kids); | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 | |
| 109 /* | |
| 110 * Apply a function to all the subwidgets of a given widget recursively. | |
| 111 * Stop as soon as the function returns non NULL and returns this as a value. | |
| 112 */ | |
| 113 void * | |
| 114 XtApplyUntilToWidgets (Widget w, XtApplyUntilToWidgetsProc proc, XtPointer arg) | |
| 115 { | |
| 116 void* result; | |
| 117 if (XtIsComposite (w)) | |
| 118 { | |
| 119 CompositeWidget cw = (CompositeWidget)w; | |
| 120 int i; | |
| 647 | 121 for (i = 0; i < (int) cw->composite.num_children; i++) |
| 122 if (XtIsWidget (cw->composite.children[i])) | |
| 123 { | |
| 124 result = proc (cw->composite.children[i], arg); | |
| 125 if (result) | |
| 126 return result; | |
| 127 result = XtApplyUntilToWidgets (cw->composite.children[i], proc, | |
| 128 arg); | |
| 129 if (result) | |
| 130 return result; | |
| 131 } | |
| 428 | 132 } |
| 133 return NULL; | |
| 134 } | |
| 135 | |
| 136 | |
| 137 /* | |
| 138 * Returns a copy of the list of all children of a composite widget | |
| 139 */ | |
| 140 Widget * | |
| 141 XtCompositeChildren (Widget widget, unsigned int* number) | |
| 142 { | |
| 143 CompositeWidget cw = (CompositeWidget)widget; | |
| 144 Widget* result; | |
| 145 int n; | |
| 146 int i; | |
| 147 | |
| 148 if (!XtIsComposite (widget)) | |
| 149 { | |
| 150 *number = 0; | |
| 151 return NULL; | |
| 152 } | |
| 153 n = cw->composite.num_children; | |
| 154 result = (Widget*)XtMalloc (n * sizeof (Widget)); | |
| 155 *number = n; | |
| 156 for (i = 0; i < n; i++) | |
| 157 result [i] = cw->composite.children [i]; | |
| 158 return result; | |
| 159 } | |
| 160 | |
| 161 Boolean | |
| 162 XtWidgetBeingDestroyedP (Widget widget) | |
| 163 { | |
| 164 return widget->core.being_destroyed; | |
| 165 } | |
| 166 | |
| 167 void | |
| 2286 | 168 XtSafelyDestroyWidget (Widget UNUSED (widget)) |
| 428 | 169 { |
| 170 #if 0 | |
| 171 | |
| 172 /* this requires IntrinsicI.h (actually, InitialI.h) */ | |
| 173 | |
| 174 XtAppContext app = XtWidgetToApplicationContext(widget); | |
| 175 | |
| 176 if (app->dispatch_level == 0) | |
| 177 { | |
| 178 app->dispatch_level = 1; | |
| 179 XtDestroyWidget (widget); | |
| 180 /* generates an event so that the event loop will be called */ | |
| 181 XChangeProperty (XtDisplay (widget), XtWindow (widget), | |
| 182 XA_STRING, XA_STRING, 32, PropModeAppend, NULL, 0); | |
| 183 app->dispatch_level = 0; | |
| 184 } | |
| 185 else | |
| 186 XtDestroyWidget (widget); | |
| 187 | |
| 188 #else | |
| 189 abort (); | |
| 190 #endif | |
| 191 } |