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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);
- }
-
-