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/* The lwlib interface to "xlwmenu" menus.
Copyright (C) 1992, 1994 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 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. */
#include <stdlib.h> /* for abort () */
#include <limits.h>
#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"
#include "xlwscrollbar.h"
/* Menu callbacks */
static void
pre_hook (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 0
/* #### - this code used to (for some random back_asswards reason) pass
the expression below in the call_data slot. For incremental menu
construction, this needs to go. I can't even figure out why it was done
this way in the first place...it's just a historical wierdism. --Stig */
call_data = (val ? val->call_data : NULL);
#endif
if (val && val->call_data)
abort(); /* #### - the call_data for the top_level
"menubar" widget_value used to be passed
back to the pre_hook. */
if (instance->info->pre_activate_cb)
instance->info->pre_activate_cb (w, instance->info->id, call_data);
}
static void
pick_hook (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;
LWLIB_ID id;
lw_callback post_activate_cb;
if (w->core.being_destroyed)
return;
/* Grab these values before running any functions, in case running
the selection_cb causes the widget to be destroyed. */
id = instance->info->id;
post_activate_cb = instance->info->post_activate_cb;
widget_val = lw_get_widget_value_for_widget (instance, w);
widget_arg = widget_val ? widget_val->call_data : NULL;
if (instance->info->selection_cb &&
contents_val &&
contents_val->enabled &&
!contents_val->contents)
instance->info->selection_cb (w, id, contents_val->call_data);
if (post_activate_cb)
post_activate_cb (w, id, widget_arg);
}
/* creation functions */
#ifdef MENUBARS_LUCID
static Widget
xlw_create_menubar (widget_instance* instance)
{
Widget widget =
XtVaCreateWidget (instance->info->name, xlwMenuWidgetClass,
instance->parent,
XtNmenu, instance->info->val,
0);
XtAddCallback (widget, XtNopen, pre_hook, (XtPointer)instance);
XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
return widget;
}
static Widget
xlw_create_popup_menu (widget_instance* instance)
{
Widget popup_shell =
XtCreatePopupShell (instance->info->name, overrideShellWidgetClass,
instance->parent, NULL, 0);
Widget widget =
XtVaCreateManagedWidget ("popup", xlwMenuWidgetClass,
popup_shell,
XtNmenu, instance->info->val,
XtNhorizontal, False,
0);
XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
return popup_shell;
}
#endif /* MENUBARS_LUCID */
#ifdef SCROLLBARS_LUCID
static void
xlw_scrollbar_callback (Widget widget, XtPointer closure, XtPointer call_data)
{
widget_instance *instance = (widget_instance *) closure;
LWLIB_ID id;
XlwScrollBarCallbackStruct *data =
(XlwScrollBarCallbackStruct *) call_data;
scroll_event event_data;
scrollbar_values *val =
(scrollbar_values *) instance->info->val->scrollbar_data;
double percent;
if (!instance || widget->core.being_destroyed)
return;
id = instance->info->id;
percent = (double) (data->value - 1) / (double) (INT_MAX - 1);
event_data.slider_value =
(int) (percent * (double) (val->maximum - val->minimum)) + val->minimum;
if (event_data.slider_value > (val->maximum - val->slider_size))
event_data.slider_value = val->maximum - val->slider_size;
else if (event_data.slider_value < val->minimum)
event_data.slider_value = val->minimum;
if (data->event)
{
switch (data->event->xany.type)
{
case KeyPress:
case KeyRelease:
event_data.time = data->event->xkey.time;
break;
case ButtonPress:
case ButtonRelease:
event_data.time = data->event->xbutton.time;
break;
case MotionNotify:
event_data.time = data->event->xmotion.time;
break;
case EnterNotify:
case LeaveNotify:
event_data.time = data->event->xcrossing.time;
break;
default:
event_data.time = 0;
break;
}
}
else
event_data.time = 0;
switch (data->reason)
{
case XmCR_DECREMENT:
event_data.action = SCROLLBAR_LINE_UP;
break;
case XmCR_INCREMENT:
event_data.action = SCROLLBAR_LINE_DOWN;
break;
case XmCR_PAGE_DECREMENT:
event_data.action = SCROLLBAR_PAGE_UP;
break;
case XmCR_PAGE_INCREMENT:
event_data.action = SCROLLBAR_PAGE_DOWN;
break;
case XmCR_TO_TOP:
event_data.action = SCROLLBAR_TOP;
break;
case XmCR_TO_BOTTOM:
event_data.action = SCROLLBAR_BOTTOM;
break;
case XmCR_DRAG:
event_data.action = SCROLLBAR_DRAG;
break;
case XmCR_VALUE_CHANGED:
event_data.action = SCROLLBAR_CHANGE;
break;
default:
event_data.action = SCROLLBAR_CHANGE;
break;
}
if (instance->info->pre_activate_cb)
instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
}
/* #### Does not yet support horizontal scrollbars. */
static Widget
xlw_create_scrollbar (widget_instance *instance, int vertical)
{
Arg al[20];
int ac = 0;
Widget scrollbar;
XtSetArg (al[ac], XmNminimum, 1); ac++;
XtSetArg (al[ac], XmNmaximum, INT_MAX); ac++;
XtSetArg (al[ac], XmNincrement, 1); ac++;
XtSetArg (al[ac], XmNpageIncrement, 1); ac++;
if (vertical)
{
XtSetArg (al[ac], XmNorientation, XmVERTICAL); ac++;
}
else
{
XtSetArg (al[ac], XmNorientation, XmHORIZONTAL); ac++;
}
scrollbar =
XtCreateWidget (instance->info->name, xlwScrollBarWidgetClass, instance->parent, al, ac);
XtAddCallback(scrollbar, XmNdecrementCallback, xlw_scrollbar_callback,
(XtPointer) instance);
XtAddCallback(scrollbar, XmNdragCallback, xlw_scrollbar_callback,
(XtPointer) instance);
XtAddCallback(scrollbar, XmNincrementCallback, xlw_scrollbar_callback,
(XtPointer) instance);
XtAddCallback(scrollbar, XmNpageDecrementCallback, xlw_scrollbar_callback,
(XtPointer) instance);
XtAddCallback(scrollbar, XmNpageIncrementCallback, xlw_scrollbar_callback,
(XtPointer) instance);
XtAddCallback(scrollbar, XmNtoBottomCallback, xlw_scrollbar_callback,
(XtPointer) instance);
XtAddCallback(scrollbar, XmNtoTopCallback, xlw_scrollbar_callback,
(XtPointer) instance);
XtAddCallback(scrollbar, XmNvalueChangedCallback, xlw_scrollbar_callback,
(XtPointer) instance);
return scrollbar;
}
static Widget
xlw_create_vertical_scrollbar (widget_instance *instance)
{
return xlw_create_scrollbar (instance, 1);
}
static Widget
xlw_create_horizontal_scrollbar (widget_instance *instance)
{
return xlw_create_scrollbar (instance, 0);
}
#endif /* SCROLLBARS_LUCID */
static void
xlw_update_scrollbar (widget_instance *instance, Widget widget,
widget_value *val)
{
if (val->scrollbar_data)
{
scrollbar_values *data = val->scrollbar_data;
int widget_sliderSize, widget_val;
int new_sliderSize, new_value;
double percent;
/*
* First size and position the scrollbar widget.
*/
XtVaSetValues (widget,
XtNx, data->scrollbar_x,
XtNy, data->scrollbar_y,
XtNwidth, data->scrollbar_width,
XtNheight, data->scrollbar_height,
0);
/*
* Now the size the scrollbar's slider.
*/
XtVaGetValues (widget,
XmNsliderSize, &widget_sliderSize,
XmNvalue, &widget_val,
0);
percent = (double) data->slider_size /
(double) (data->maximum - data->minimum);
percent = (percent > 1.0 ? 1.0 : percent);
new_sliderSize = (int) ((double) (INT_MAX - 1) * percent);
percent = (double) (data->slider_position - data->minimum) /
(double) (data->maximum - data->minimum);
percent = (percent > 1.0 ? 1.0 : percent);
new_value = (int) ((double) (INT_MAX - 1) * percent);
if (new_sliderSize > (INT_MAX - 1))
new_sliderSize = INT_MAX - 1;
if (new_sliderSize < 1)
new_sliderSize = 1;
if (new_value > (INT_MAX - new_sliderSize))
new_value = INT_MAX - new_sliderSize;
else if (new_value < 1)
new_value = 1;
if (new_sliderSize != widget_sliderSize || new_value != widget_val)
XlwScrollBarSetValues (widget, new_value, new_sliderSize, 1, 1, False);
}
}
widget_creation_entry
xlw_creation_table [] =
{
#ifdef MENUBARS_LUCID
{"menubar", xlw_create_menubar},
{"popup", xlw_create_popup_menu},
#endif
#ifdef SCROLLBARS_LUCID
{"vertical-scrollbar", xlw_create_vertical_scrollbar},
{"horizontal-scrollbar", xlw_create_horizontal_scrollbar},
#endif
{NULL, NULL}
};
Boolean
lw_lucid_widget_p (Widget widget)
{
WidgetClass the_class = XtClass (widget);
if (the_class == xlwMenuWidgetClass)
return True;
if (the_class == xlwScrollBarWidgetClass)
return True;
if (the_class == overrideShellWidgetClass)
return
XtClass (((CompositeWidget)widget)->composite.children [0])
== xlwMenuWidgetClass;
return False;
}
void
xlw_update_one_widget (widget_instance* instance, Widget widget,
widget_value* val, Boolean deep_p)
{
WidgetClass class;
XlwMenuWidget mw;
class = XtClass (widget);
if (class == xlwMenuWidgetClass)
{
if (XtIsShell (widget))
mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
else
mw = (XlwMenuWidget)widget;
XtVaSetValues (widget, XtNmenu, val, 0);
}
else if( class == xlwScrollBarWidgetClass )
{
xlw_update_scrollbar (instance, widget, val);
}
}
void
xlw_update_one_value (widget_instance* instance, Widget widget,
widget_value* val)
{
return;
}
void
xlw_pop_instance (widget_instance* instance, Boolean up)
{
}
void
xlw_popup_menu (Widget widget, XEvent *event)
{
XlwMenuWidget mw;
if (!XtIsShell (widget))
return;
if (event->type == ButtonPress || event->type == ButtonRelease)
{
mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
xlw_pop_up_menu (mw, (XButtonPressedEvent *)event);
}
else
abort ();
}
/* Destruction of instances */
void
xlw_destroy_instance (widget_instance* instance)
{
if (instance->widget)
XtDestroyWidget (instance->widget);
}
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