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- /* The lwlib interface to "xlwmenu" menus.
- Copyright (C) 1992 Lucid, Inc.
-
- 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 1, 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. */
-
- #include "lwlib-Xlw.h"
- #include <X11/StringDefs.h>
- #include <X11/IntrinsicP.h>
- #include <X11/ObjectP.h>
- #include <X11/CompositeP.h>
- #include <X11/Shell.h>
- #include "xlwmenu.h"
-
- /* Menu callbacks */
- static void
- pre_hook (w, client_data, call_data)
- Widget w;
- XtPointer client_data;
- XtPointer call_data;
- {
- widget_instance* instance = (widget_instance*)client_data;
- widget_value* val;
-
- if (w->core.being_destroyed)
- return;
-
- val = lw_get_widget_value_for_widget (instance, w);
- if (instance->info->pre_activate_cb)
- instance->info->pre_activate_cb (w, instance->info->id,
- val ? val->call_data : NULL);
- }
-
- static void
- pick_hook (w, client_data, call_data)
- Widget w;
- XtPointer client_data;
- XtPointer call_data;
- {
- widget_instance* instance = (widget_instance*)client_data;
- widget_value* contents_val = (widget_value*)call_data;
- widget_value* widget_val;
- XtPointer widget_arg;
-
- if (w->core.being_destroyed)
- return;
-
- if (instance->info->selection_cb && contents_val && contents_val->enabled
- && !contents_val->contents)
- instance->info->selection_cb (w, instance->info->id,
- contents_val->call_data);
-
- widget_val = lw_get_widget_value_for_widget (instance, w);
- widget_arg = widget_val ? widget_val->call_data : NULL;
- if (instance->info->post_activate_cb)
- instance->info->post_activate_cb (w, instance->info->id, widget_arg);
-
- }
-
- /* creation functions */
-
- static Widget
- xlw_create_menubar (instance)
- widget_instance* instance;
- {
- Widget widget;
- Arg al[1];
- int ac = 0;
-
- XtSetArg (al[ac], XtNmenu, instance->info->val); ac++;
-
- /* This used to use XtVaCreateWidget, but an old Xt version
- has a bug in XtVaCreateWidget that frees instance->info->name. */
- widget
- = XtCreateWidget (instance->info->name, xlwMenuWidgetClass,
- instance->parent, al, ac);
-
- XtAddCallback (widget, XtNopen, pre_hook, (XtPointer)instance);
- XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
- return widget;
- }
-
- static Widget
- xlw_create_popup_menu (instance)
- widget_instance* instance;
- {
- Widget popup_shell
- = XtCreatePopupShell (instance->info->name, overrideShellWidgetClass,
- instance->parent, NULL, 0);
-
- Widget widget;
- Arg al[2];
- int ac = 0;
-
- XtSetArg (al[ac], XtNmenu, instance->info->val); ac++;
- XtSetArg (al[ac], XtNhorizontal, False); ac++;
-
- /* This used to use XtVaManagedCreateWidget, but an old Xt version
- has a bug in XtVaManagedCreateWidget that frees instance->info->name. */
- widget
- = XtCreateManagedWidget ("popup", xlwMenuWidgetClass,
- popup_shell, al, ac);
-
- XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
-
- return popup_shell;
- }
-
- widget_creation_entry
- xlw_creation_table [] =
- {
- {"menubar", xlw_create_menubar},
- {"popup", xlw_create_popup_menu},
- {NULL, NULL}
- };
-
- Boolean
- lw_lucid_widget_p (widget)
- Widget widget;
- {
- WidgetClass the_class = XtClass (widget);
-
- if (the_class == xlwMenuWidgetClass)
- return True;
- if (the_class == overrideShellWidgetClass)
- return (XtClass (((CompositeWidget)widget)->composite.children [0])
- == xlwMenuWidgetClass);
- return False;
- }
-
- void
- xlw_update_one_widget (instance, widget, val, deep_p)
- widget_instance* instance;
- Widget widget;
- widget_value* val;
- Boolean deep_p;
- {
- XlwMenuWidget mw;
- Arg al[1];
-
- if (XtIsShell (widget))
- mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
- else
- mw = (XlwMenuWidget)widget;
-
- /* This used to use XtVaSetValues, but some old Xt versions
- that have a bug in XtVaCreateWidget might have it here too. */
- XtSetArg (al[0], XtNmenu, instance->info->val);
-
- XtSetValues (widget, al, 1);
- }
-
- void
- xlw_update_one_value (instance, widget, val)
- widget_instance* instance;
- Widget widget;
- widget_value* val;
- {
- return;
- }
-
- void
- xlw_pop_instance (instance, up)
- widget_instance* instance;
- Boolean up;
- {
- }
-
- void
- xlw_popup_menu (widget)
- Widget widget;
- {
- XButtonPressedEvent dummy;
- XlwMenuWidget mw;
-
- if (!XtIsShell (widget))
- return;
-
- mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
-
- dummy.type = ButtonPress;
- dummy.serial = 0;
- dummy.send_event = 0;
- dummy.display = XtDisplay (widget);
- dummy.window = XtWindow (XtParent (widget));
- dummy.time = CurrentTime;
- dummy.button = 0;
- XQueryPointer (dummy.display, dummy.window, &dummy.root,
- &dummy.subwindow, &dummy.x_root, &dummy.y_root,
- &dummy.x, &dummy.y, &dummy.state);
-
- pop_up_menu (mw, &dummy);
- }
-
- /* Destruction of instances */
- void
- xlw_destroy_instance (instance)
- widget_instance* instance;
- {
- if (instance->widget)
- XtDestroyWidget (instance->widget);
- }
-
-