1 /* Defines some widget utility functions.
2 Copyright (C) 1992 Lucid, Inc.
4 This file is part of the Lucid Widget Library.
6 The Lucid Widget Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 1, or (at your option)
11 The Lucid Widget Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
29 #include <X11/Xatom.h>
30 #include <X11/IntrinsicP.h>
31 #include <X11/ObjectP.h>
32 #include "lwlib-utils.h"
35 destroy_all_children (Widget widget)
41 children = XtCompositeChildren (widget, &number);
44 /* Unmanage all children and destroy them. They will only be
45 * really destroyed when we get out of DispatchEvent. */
46 for (i = 0; i < (int) number; i++)
48 Widget child = children [i];
49 if (!child->core.being_destroyed)
51 XtUnmanageChild (child);
52 XtDestroyWidget (child);
55 XtFree ((char *) children);
59 /* Redisplay the contents of the widget, without first clearing it. */
61 XtNoClearRefreshWidget (Widget widget)
64 XExposeEvent* ev = &event.xexpose;
69 ev->display = XtDisplay (widget);
70 ev->window = XtWindow (widget);
73 ev->width = widget->core.width;
74 ev->height = widget->core.height;
77 (*widget->core.widget_class->core_class.expose)
78 (widget, &event, (Region)NULL);
83 * Apply a function to all the subwidgets of a given widget recursively.
86 XtApplyToWidgets (Widget w, XtApplyToWidgetsProc proc, XtPointer arg)
88 if (XtIsComposite (w))
90 CompositeWidget cw = (CompositeWidget) w;
91 /* We have to copy the children list before mapping over it, because
92 the procedure might add/delete elements, which would lose badly. */
93 int nkids = cw->composite.num_children;
94 Widget *kids = (Widget *) malloc (sizeof (Widget) * nkids);
96 memcpy (kids, cw->composite.children, sizeof (Widget) * nkids);
97 for (i = 0; i < nkids; i++)
98 /* This prevent us from using gadgets, why is it here? */
99 /* if (XtIsWidget (kids [i])) */
101 /* do the kiddies first in case we're destroying */
102 XtApplyToWidgets (kids [i], proc, arg);
103 proc (kids [i], arg);
111 * Apply a function to all the subwidgets of a given widget recursively.
112 * Stop as soon as the function returns non NULL and returns this as a value.
115 XtApplyUntilToWidgets (Widget w, XtApplyUntilToWidgetsProc proc, XtPointer arg)
118 if (XtIsComposite (w))
120 CompositeWidget cw = (CompositeWidget)w;
122 for (i = 0; i < cw->composite.num_children; i++)
123 if (XtIsWidget (cw->composite.children [i])){
124 result = proc (cw->composite.children [i], arg);
127 result = XtApplyUntilToWidgets (cw->composite.children [i], proc,
138 * Returns a copy of the list of all children of a composite widget
141 XtCompositeChildren (Widget widget, unsigned int* number)
143 CompositeWidget cw = (CompositeWidget)widget;
148 if (!XtIsComposite (widget))
153 n = cw->composite.num_children;
154 result = (Widget*)XtMalloc (n * sizeof (Widget));
156 for (i = 0; i < n; i++)
157 result [i] = cw->composite.children [i];
162 XtWidgetBeingDestroyedP (Widget widget)
164 return widget->core.being_destroyed;
168 XtSafelyDestroyWidget (Widget widget)
172 /* this requires IntrinsicI.h (actually, InitialI.h) */
174 XtAppContext app = XtWidgetToApplicationContext(widget);
176 if (app->dispatch_level == 0)
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;
186 XtDestroyWidget (widget);