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140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/* Defines some widget utility functions.
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Copyright (C) 1992 Lucid, Inc.
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Copyright (C) 1994, 2001-2018 Free Software Foundation, Inc.
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This file is part of the Lucid Widget Library.
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The Lucid Widget Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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The Lucid Widget Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <setjmp.h>
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#include <lisp.h>
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#include <X11/Xatom.h>
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#include <X11/IntrinsicP.h>
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#include <X11/ObjectP.h>
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#include "lwlib-utils.h"
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#include "lwlib.h"
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/* Redisplay the contents of the widget, without first clearing it. */
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void
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XtNoClearRefreshWidget (Widget widget)
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{
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XEvent event;
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event.type = Expose;
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event.xexpose.serial = 0;
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event.xexpose.send_event = 0;
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event.xexpose.display = XtDisplay (widget);
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event.xexpose.window = XtWindow (widget);
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event.xexpose.x = 0;
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event.xexpose.y = 0;
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event.xexpose.width = widget->core.width;
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event.xexpose.height = widget->core.height;
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event.xexpose.count = 0;
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(*widget->core.widget_class->core_class.expose)
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(widget, &event, (Region)NULL);
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}
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/*
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* Apply a function to all the subwidgets of a given widget recursively.
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*/
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void
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XtApplyToWidgets (Widget w, XtApplyToWidgetsProc proc, XtPointer arg)
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{
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if (XtIsComposite (w))
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{
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CompositeWidget cw = (CompositeWidget) w;
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/* We have to copy the children list before mapping over it, because
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the procedure might add/delete elements, which would lose badly.
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*/
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int nkids = cw->composite.num_children;
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Widget *kids = (Widget *) xmalloc (sizeof (Widget) * nkids);
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int i;
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memcpy ((char *) kids, (char *) cw->composite.children,
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sizeof (Widget) * nkids);
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for (i = 0; i < nkids; i++)
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/* This prevent us from using gadgets, why is it here? */
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/* if (XtIsWidget (kids [i])) */
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{
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/* do the kiddies first in case we're destroying */
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XtApplyToWidgets (kids [i], proc, arg);
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proc (kids [i], arg);
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}
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xfree (kids);
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}
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}
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/*
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* Apply a function to all the subwidgets of a given widget recursively.
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* Stop as soon as the function returns non NULL and returns this as a value.
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*/
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void *
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XtApplyUntilToWidgets (Widget w, XtApplyUntilToWidgetsProc proc, XtPointer arg)
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{
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void* result;
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if (XtIsComposite (w))
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{
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CompositeWidget cw = (CompositeWidget)w;
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int i;
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for (i = 0; i < cw->composite.num_children; i++)
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if (XtIsWidget (cw->composite.children [i])){
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result = proc (cw->composite.children [i], arg);
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if (result)
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return result;
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result = XtApplyUntilToWidgets (cw->composite.children [i], proc,
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arg);
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if (result)
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return result;
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}
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}
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return NULL;
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}
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/*
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* Returns a copy of the list of all children of a composite widget
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*/
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Widget *
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XtCompositeChildren (Widget widget, unsigned int *number)
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{
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CompositeWidget cw = (CompositeWidget)widget;
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Widget* result;
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int n;
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int i;
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if (!XtIsComposite (widget))
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{
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*number = 0;
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return NULL;
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}
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n = cw->composite.num_children;
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result = (Widget*)(void*)XtMalloc (n * sizeof (Widget));
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*number = n;
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for (i = 0; i < n; i++)
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result [i] = cw->composite.children [i];
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return result;
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}
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Boolean
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XtWidgetBeingDestroyedP (Widget widget)
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{
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return widget->core.being_destroyed;
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}
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