--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlib/lwlib-Xaw.c	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,612 @@
+/* The lwlib interface to Athena widgets.
+   Copyright (C) 1993, 1994 Free Software Foundation, 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 <stdio.h>
+
+#include "lwlib-Xaw.h"
+
+#include <X11/StringDefs.h>
+#include <X11/IntrinsicP.h>
+#include <X11/CoreP.h>
+#include <X11/Shell.h>
+
+#ifdef SCROLLBARS_ATHENA
+#include <X11/Xaw/Scrollbar.h>
+#endif
+#ifdef DIALOGS_ATHENA
+#include <X11/Xaw/Dialog.h>
+#include <X11/Xaw/Form.h>
+#include <X11/Xaw/Command.h>
+#include <X11/Xaw/Label.h>
+#endif
+
+#include <X11/Xatom.h>
+
+static void xaw_generic_callback (Widget, XtPointer, XtPointer);
+
+
+Boolean
+lw_xaw_widget_p (Widget widget)
+{
+  return (0
+#ifdef SCROLLBARS_ATHENA
+	  || XtIsSubclass (widget, scrollbarWidgetClass)
+#endif
+#ifdef DIALOGS_ATHENA
+	  || XtIsSubclass (widget, dialogWidgetClass)
+#endif
+	  );
+}
+
+#ifdef SCROLLBARS_ATHENA
+static void
+xaw_update_scrollbar (widget_instance *instance, Widget widget,
+		      widget_value *val)
+{
+  if (val->scrollbar_data)
+    {
+      scrollbar_values *data = val->scrollbar_data;
+      float widget_shown, widget_topOfThumb;
+      float new_shown, new_topOfThumb;
+
+      /*
+       * 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,
+		     XtNtopOfThumb, &widget_topOfThumb,
+		     XtNshown, &widget_shown,
+		     0);
+
+      new_shown = (double) data->slider_size /
+	(double) (data->maximum - data->minimum);
+
+      new_topOfThumb = (double) (data->slider_position - data->minimum) /
+	(double) (data->maximum - data->minimum);
+
+      if (new_shown > 1.0)
+	new_shown = 1.0;
+      if (new_shown < 0)
+	new_shown = 0;
+
+      if (new_topOfThumb > 1.0)
+	new_topOfThumb = 1.0;
+      if (new_topOfThumb < 0)
+	new_topOfThumb = 0;
+
+      if (new_shown != widget_shown || new_topOfThumb != widget_topOfThumb)
+	XawScrollbarSetThumb (widget, new_topOfThumb, new_shown);
+    }
+}
+#endif /* SCROLLBARS_ATHENA */
+
+void
+xaw_update_one_widget (widget_instance *instance, Widget widget,
+		       widget_value *val, Boolean deep_p)
+{
+  if (0)
+    ;
+#ifdef SCROLLBARS_ATHENA
+  else if (XtIsSubclass (widget, scrollbarWidgetClass))
+    {
+      xaw_update_scrollbar (instance, widget, val);
+    }
+#endif
+#ifdef DIALOGS_ATHENA
+  else if (XtIsSubclass (widget, dialogWidgetClass))
+      {
+	XtVaSetValues (widget, XtNlabel, val->contents->value, 0);
+      }
+  else if (XtIsSubclass (widget, commandWidgetClass))
+    {
+      Dimension bw = 0;
+      XtVaGetValues (widget, XtNborderWidth, &bw, 0);
+      if (bw == 0)
+	/* Don't let buttons end up with 0 borderwidth, that's ugly...
+	   Yeah, all this should really be done through app-defaults files
+	   or fallback resources, but that's a whole different can of worms
+	   that I don't feel like opening right now.  Making Athena widgets
+	   not look like shit is just entirely too much work.
+	 */
+	XtVaSetValues (widget, XtNborderWidth, 1, 0);
+
+      XtVaSetValues (widget,
+		     XtNlabel, val->value,
+		     XtNsensitive, val->enabled,
+		     /* Force centered button text.  Se above. */
+		     XtNjustify, XtJustifyCenter,
+		     0);
+
+      XtRemoveAllCallbacks (widget, XtNcallback);
+      XtAddCallback (widget, XtNcallback, xaw_generic_callback, instance);
+    }
+#endif
+}
+
+void
+xaw_update_one_value (widget_instance *instance, Widget widget,
+		      widget_value *val)
+{
+  /* This function is not used by the scrollbars and those are the only
+     Athena widget implemented at the moment so do nothing. */
+  return;
+}
+
+void
+xaw_destroy_instance (widget_instance *instance)
+{
+#ifdef DIALOGS_ATHENA
+  if (XtIsSubclass (instance->widget, dialogWidgetClass))
+    /* Need to destroy the Shell too. */
+    XtDestroyWidget (XtParent (instance->widget));
+  else
+#endif
+    XtDestroyWidget (instance->widget);
+}
+
+void
+xaw_popup_menu (Widget widget, XEvent *event)
+{
+  /* An Athena menubar has not been implemented. */
+  return;
+}
+
+void
+xaw_pop_instance (widget_instance *instance, Boolean up)
+{
+  Widget widget = instance->widget;
+
+  if (up)
+    {
+#ifdef DIALOGS_ATHENA
+      if (XtIsSubclass (widget, dialogWidgetClass))
+	{
+	  /* For dialogs, we need to call XtPopup on the parent instead
+	     of calling XtManageChild on the widget.
+	     Also we need to hack the shell's WM_PROTOCOLS to get it to
+	     understand what the close box is supposed to do!!
+	   */
+	  Display *dpy = XtDisplay (widget);
+	  Widget shell = XtParent (widget);
+	  Atom props [2];
+	  int i = 0;
+	  props [i++] = XInternAtom (dpy, "WM_DELETE_WINDOW", False);
+	  XChangeProperty (dpy, XtWindow (shell),
+			   XInternAtom (dpy, "WM_PROTOCOLS", False),
+			   XA_ATOM, 32, PropModeAppend,
+			   (unsigned char *) props, i);
+
+	  /* Center the widget in its parent.  Why isn't this kind of crap
+	     done automatically?  I thought toolkits were supposed to make
+	     life easier?
+	   */
+	  {
+	    unsigned int x, y, w, h;
+	    Widget topmost = instance->parent;
+	    w = shell->core.width;
+	    h = shell->core.height;
+	    while (topmost->core.parent && XtIsRealized (topmost->core.parent))
+	      topmost = topmost->core.parent;
+	    if (topmost->core.width < w) x = topmost->core.x;
+	    else x = topmost->core.x + ((topmost->core.width - w) / 2);
+	    if (topmost->core.height < h) y = topmost->core.y;
+	    else y = topmost->core.y + ((topmost->core.height - h) / 2);
+	    XtMoveWidget (shell, x, y);
+	  }
+
+	  /* Finally, pop it up. */
+	  XtPopup (shell, XtGrabNonexclusive);
+	}
+      else
+#endif /* DIALOGS_ATHENA */
+	XtManageChild (widget);
+    }
+  else
+    {
+#ifdef DIALOGS_ATHENA
+      if (XtIsSubclass (widget, dialogWidgetClass))
+	XtUnmanageChild (XtParent (widget));
+      else
+#endif
+	XtUnmanageChild (widget);
+    }
+}
+
+
+#ifdef DIALOGS_ATHENA
+/* Dialog boxes */
+
+static char overrideTrans[] =
+	"<Message>WM_PROTOCOLS: lwlib_delete_dialog()";
+static XtActionProc wm_delete_window (Widget shell, XtPointer closure,
+				      XtPointer call_data);
+static XtActionsRec xaw_actions [] = {
+  {"lwlib_delete_dialog", (XtActionProc) wm_delete_window}
+};
+static Boolean actions_initted = False;
+
+static Widget
+make_dialog (CONST char* name, Widget parent, Boolean pop_up_p,
+	     CONST char* shell_title, CONST char* icon_name,
+             Boolean text_input_slot,
+	     Boolean radio_box, Boolean list,
+	     int left_buttons, int right_buttons)
+{
+  Arg av [20];
+  int ac = 0;
+  int i, bc;
+  char button_name [255];
+  Widget shell;
+  Widget dialog;
+  Widget button;
+  XtTranslations override;
+
+  if (! pop_up_p) abort (); /* not implemented */
+  if (text_input_slot) abort (); /* not implemented */
+  if (radio_box) abort (); /* not implemented */
+  if (list) abort (); /* not implemented */
+
+  if (! actions_initted)
+    {
+      XtAppContext app = XtWidgetToApplicationContext (parent);
+      XtAppAddActions (app, xaw_actions,
+		       sizeof (xaw_actions) / sizeof (xaw_actions[0]));
+      actions_initted = True;
+    }
+
+  override = XtParseTranslationTable (overrideTrans);
+
+  ac = 0;
+  XtSetArg (av[ac], XtNtitle, shell_title); ac++;
+  XtSetArg (av[ac], XtNallowShellResize, True); ac++;
+  XtSetArg (av[ac], XtNtransientFor, parent); ac++;
+  shell = XtCreatePopupShell ("dialog", transientShellWidgetClass,
+			      parent, av, ac);
+  XtOverrideTranslations (shell, override);
+
+  ac = 0;
+  dialog = XtCreateManagedWidget (name, dialogWidgetClass, shell, av, ac);
+
+  bc = 0;
+  button = 0;
+  for (i = 0; i < left_buttons; i++)
+    {
+      ac = 0;
+      XtSetArg (av [ac], XtNfromHoriz, button); ac++;
+      XtSetArg (av [ac], XtNleft, XtChainLeft); ac++;
+      XtSetArg (av [ac], XtNright, XtChainLeft); ac++;
+      XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
+      XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
+      XtSetArg (av [ac], XtNresizable, True); ac++;
+      sprintf (button_name, "button%d", ++bc);
+      button = XtCreateManagedWidget (button_name, commandWidgetClass,
+				      dialog, av, ac);
+    }
+  if (right_buttons)
+    {
+      /* Create a separator
+
+	 I want the separator to take up the slack between the buttons on
+	 the right and the buttons on the left (that is I want the buttons
+	 after the separator to be packed against the right edge of the
+	 window) but I can't seem to make it do it.  
+       */
+      ac = 0;
+      XtSetArg (av [ac], XtNfromHoriz, button); ac++;
+/*  XtSetArg (av [ac], XtNfromVert, XtNameToWidget (dialog, "label")); ac++; */
+      XtSetArg (av [ac], XtNleft, XtChainLeft); ac++;
+      XtSetArg (av [ac], XtNright, XtChainRight); ac++;
+      XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
+      XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
+      XtSetArg (av [ac], XtNlabel, ""); ac++;
+      XtSetArg (av [ac], XtNwidth, 30); ac++;	/* #### aaack!! */
+      XtSetArg (av [ac], XtNborderWidth, 0); ac++;
+      XtSetArg (av [ac], XtNshapeStyle, XmuShapeRectangle); ac++;
+      XtSetArg (av [ac], XtNresizable, False); ac++;
+      XtSetArg (av [ac], XtNsensitive, False); ac++;
+      button = XtCreateManagedWidget ("separator",
+				      /* labelWidgetClass, */
+				      /* This has to be Command to fake out
+					 the Dialog widget... */
+				      commandWidgetClass,
+				      dialog, av, ac);
+    }
+  for (i = 0; i < right_buttons; i++)
+    {
+      ac = 0;
+      XtSetArg (av [ac], XtNfromHoriz, button); ac++;
+      XtSetArg (av [ac], XtNleft, XtChainRight); ac++;
+      XtSetArg (av [ac], XtNright, XtChainRight); ac++;
+      XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
+      XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
+      XtSetArg (av [ac], XtNresizable, True); ac++;
+      sprintf (button_name, "button%d", ++bc);
+      button = XtCreateManagedWidget (button_name, commandWidgetClass,
+				      dialog, av, ac);
+    }
+
+  return dialog;
+}
+
+Widget
+xaw_create_dialog (widget_instance* instance)
+{
+  char *name = instance->info->type;
+  Widget parent = instance->parent;
+  Widget widget;
+  Boolean pop_up_p = instance->pop_up_p;
+  CONST char *shell_name = 0;
+  CONST char *icon_name = 0;
+  Boolean text_input_slot = False;
+  Boolean radio_box = False;
+  Boolean list = False;
+  int total_buttons;
+  int left_buttons = 0;
+  int right_buttons = 1;
+
+  switch (name [0]) {
+  case 'E': case 'e':
+    icon_name = "dbox-error";
+    shell_name = "Error";
+    break;
+
+  case 'I': case 'i':
+    icon_name = "dbox-info";
+    shell_name = "Information";
+    break;
+
+  case 'L': case 'l':
+    list = True;
+    icon_name = "dbox-question";
+    shell_name = "Prompt";
+    break;
+
+  case 'P': case 'p':
+    text_input_slot = True;
+    icon_name = "dbox-question";
+    shell_name = "Prompt";
+    break;
+
+  case 'Q': case 'q':
+    icon_name = "dbox-question";
+    shell_name = "Question";
+    break;
+  }
+  
+  total_buttons = name [1] - '0';
+
+  if (name [3] == 'T' || name [3] == 't')
+    {
+      text_input_slot = False;
+      radio_box = True;
+    }
+  else if (name [3])
+    right_buttons = name [4] - '0';
+  
+  left_buttons = total_buttons - right_buttons;
+  
+  widget = make_dialog (name, parent, pop_up_p,
+			shell_name, icon_name, text_input_slot, radio_box,
+			list, left_buttons, right_buttons);
+
+  return widget;
+}
+#endif /* DIALOGS_ATHENA */
+
+
+static void
+xaw_generic_callback (Widget widget, XtPointer closure, XtPointer call_data)
+{
+  widget_instance *instance = (widget_instance *) closure;
+  Widget instance_widget;
+  LWLIB_ID id;
+  XtPointer user_data;
+
+  lw_internal_update_other_instances (widget, closure, call_data);
+
+  if (! instance)
+    return;
+  if (widget->core.being_destroyed)
+    return;
+
+  instance_widget = instance->widget;
+  if (!instance_widget)
+    return;
+
+  id = instance->info->id;
+
+#if 0
+  user_data = NULL;
+  XtVaGetValues (widget, XtNuserData, &user_data, 0);
+#else
+  /* Damn!  Athena doesn't give us a way to hang our own data on the
+     buttons, so we have to go find it...  I guess this assumes that
+     all instances of a button have the same call data. */
+  {
+    widget_value *val = instance->info->val->contents;
+    char *name = XtName (widget);
+    while (val)
+      {
+	if (val->name && !strcmp (val->name, name))
+	  break;
+	val = val->next;
+      }
+    if (! val) abort ();
+    user_data = val->call_data;
+  }
+#endif
+
+  if (instance->info->selection_cb)
+    instance->info->selection_cb (widget, id, user_data);
+}
+
+#ifdef DIALOGS_ATHENA
+
+static XtActionProc
+wm_delete_window (Widget shell, XtPointer closure, XtPointer call_data)
+{
+  LWLIB_ID id;
+  Widget *kids = 0;
+  Widget widget;
+  if (! XtIsSubclass (shell, shellWidgetClass))
+    abort ();
+  XtVaGetValues (shell, XtNchildren, &kids, 0);
+  if (!kids || !*kids)
+    abort ();
+  widget = kids [0];
+  if (! XtIsSubclass (widget, dialogWidgetClass))
+    abort ();
+  id = lw_get_widget_id (widget);
+  if (! id) abort ();
+
+  {
+    widget_info *info = lw_get_widget_info (id);
+    if (! info) abort ();
+    if (info->selection_cb)
+      info->selection_cb (widget, id, (XtPointer) -1);
+  }
+
+  lw_destroy_all_widgets (id);
+  return NULL;
+}
+
+#endif /* DIALOGS_ATHENA */
+
+
+/* Scrollbars */
+
+#ifdef SCROLLBARS_ATHENA
+static void
+xaw_scrollbar_scroll (Widget widget, XtPointer closure, XtPointer call_data)
+{
+  widget_instance *instance = (widget_instance *) closure;
+  LWLIB_ID id;
+  scroll_event event_data;
+
+  if (!instance || widget->core.being_destroyed)
+    return;
+
+  id = instance->info->id;
+  event_data.slider_value = (int) call_data;
+  event_data.time = 0;
+
+  if ((int) call_data > 0)
+    event_data.action = SCROLLBAR_PAGE_DOWN;
+  else
+    event_data.action = SCROLLBAR_PAGE_UP;
+
+  if (instance->info->pre_activate_cb)
+    instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
+}
+
+static void
+xaw_scrollbar_jump (Widget widget, XtPointer closure, XtPointer call_data)
+{
+  widget_instance *instance = (widget_instance *) closure;
+  LWLIB_ID id;
+  scroll_event event_data;
+  scrollbar_values *val =
+    (scrollbar_values *) instance->info->val->scrollbar_data;
+  float percent;
+
+  if (!instance || widget->core.being_destroyed)
+    return;
+
+  id = instance->info->id;
+
+  percent = * (float *) call_data;
+  event_data.slider_value =
+    (int) (percent * (float) (val->maximum - val->minimum)) + val->minimum;
+
+  event_data.time = 0;
+  event_data.action = SCROLLBAR_DRAG;
+
+  if (instance->info->pre_activate_cb)
+    instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
+}
+
+static Widget
+xaw_create_scrollbar (widget_instance *instance, int vertical)
+{
+  Arg av[20];
+  int ac = 0;
+  Widget scrollbar;
+
+  /* #### This is tacked onto the with and height and completely
+     screws our geometry management.  We should probably make the
+     top-level aware of this so that people could have a border but so
+     few people use the Athena scrollbar now that it really isn't
+     worth the effort, at least not at the moment. */
+  XtSetArg (av [ac], XtNborderWidth, 0); ac++;
+  if (vertical)
+    {
+      XtSetArg (av [ac], XtNorientation, XtorientVertical); ac++;
+    }
+  else
+    {
+      XtSetArg (av [ac], XtNorientation, XtorientHorizontal); ac++;
+    }
+
+  scrollbar =
+    XtCreateWidget (instance->info->name, scrollbarWidgetClass,
+		    instance->parent, av, ac);
+
+  XtRemoveAllCallbacks (scrollbar, "jumpProc");
+  XtRemoveAllCallbacks (scrollbar, "scrollProc");
+
+  XtAddCallback (scrollbar, "jumpProc", xaw_scrollbar_jump,
+		 (XtPointer) instance);
+  XtAddCallback (scrollbar, "scrollProc", xaw_scrollbar_scroll,
+		 (XtPointer) instance);
+
+  return scrollbar;
+}
+
+static Widget
+xaw_create_vertical_scrollbar (widget_instance *instance)
+{
+  return xaw_create_scrollbar (instance, 1);
+}
+
+static Widget
+xaw_create_horizontal_scrollbar (widget_instance *instance)
+{
+  return xaw_create_scrollbar (instance, 0);
+}
+#endif /* SCROLLBARS_ATHENA */
+
+widget_creation_entry
+xaw_creation_table [] =
+{
+#ifdef SCROLLBARS_ATHENA
+  {"vertical-scrollbar",	xaw_create_vertical_scrollbar},
+  {"horizontal-scrollbar",	xaw_create_horizontal_scrollbar},
+#endif
+  {NULL, NULL}
+};