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/***************************************************************************/
/***************************************************************************/
/* */
/* (c) 1995-1998. The Regents of the University of California. All */
/* rights reserved. */
/* */
/* This work was produced at the University of California, Lawrence */
/* Livermore National Laboratory (UC LLNL) under contract no. */
/* W-7405-ENG-48 (Contract 48) between the U.S. Department of Energy */
/* (DOE) and The Regents of the University of California (University) */
/* for the operation of UC LLNL. Copyright is reserved to the */
/* University for purposes of controlled dissemination, */
/* commercialization through formal licensing, or other disposition */
/* under terms of Contract 48; DOE policies, regulations and orders; */
/* and U.S. statutes. The rights of the Federal Government are */
/* reserved under Contract 48 subject to the restrictions agreed upon */
/* by the DOE and University. */
/* */
/* */
/* DISCLAIMER */
/* */
/* This software was prepared as an account of work sponsored by an */
/* agency of the United States Government. Neither the United States */
/* Government nor the University of California nor any of their */
/* employees, makes any warranty, express or implied, or assumes any */
/* liability or responsibility for the accuracy, completeness, or */
/* usefulness of any information, apparatus, product, or process */
/* disclosed, or represents that its specific commercial products, */
/* process, or service by trade name, trademark, manufacturer, or */
/* otherwise, does not necessarily constitute or imply its */
/* endorsement, recommendation, or favoring by the United States */
/* Government or the University of California. The views and opinions */
/* of the authors expressed herein do not necessarily state or reflect */
/* those of the United States Government or the University of */
/* California, and shall not be used for advertising or product */
/* endorsement purposes. */
/* */
/* Permission to use, copy, modify and distribute this software and its */
/* documentation for any non-commercial purpose, without fee, is */
/* hereby granted, provided that the above copyright notice and this */
/* permission notice appear in all copies of the software and */
/* supporting documentation, and that all UC LLNL identification in */
/* the user interface remain unchanged. The title to copyright LLNL */
/* XDIR shall at all times remain with The Regents of the University */
/* of California and users agree to preserve same. Users seeking the */
/* right to make derivative works with LLNL XDIR for commercial */
/* purposes may obtain a license from the Lawrence Livermore National */
/* Laboratory's Technology Transfer Office, P.O. Box 808, L-795, */
/* Livermore, CA 94550. */
/* */
/***************************************************************************/
/***************************************************************************/
#include <X11/cursorfont.h>
#include <Xm/Xm.h>
extern Display *display;
struct dialog_list_st {
struct dialog_list_st *next;
struct dialog_list_st *prev;
Widget dialog_widget;
};
struct cursor_stack_st {
int shape;
Cursor cursor;
struct cursor_stack_st *next;
};
static struct cursor_stack_st *cursor_head = NULL;
static struct dialog_list_st *dialog_list_head = NULL;
/*
* change_cursor - Change cursor to "shape", which specifies a character
* in the standard cursor font. A stack of cursors is
* maintained to make it easy to pop back to a previously
* used cursor. Every dialog in use has to indivually
* have its cursor changed.
*/
change_cursor(shape)
int shape;
{
struct cursor_stack_st *cptr;
struct dialog_list_st *dptr;
/* Push new cursor shape onto cursor stack */
cptr = XtNew(struct cursor_stack_st);
cptr->shape = shape;
cptr->cursor = XCreateFontCursor(display, shape);
cptr->next = cursor_head;
cursor_head = cptr;
/* Maybe cursor is already that shape */
if (cptr->next && cptr->shape == cptr->next->shape)
return;
/* Change cursor */
XSync(display, 0);
dptr = dialog_list_head;
while(dptr) {
XDefineCursor(display, XtWindow(dptr->dialog_widget), cptr->cursor);
dptr = dptr->next;
}
XSync(display, 0);
}
/*
* use_busy_cursor - Change cursor to busy cursor shape.
*/
use_busy_cursor()
{
change_cursor(XC_watch);
}
/*
* use_outlines_cursor - Change cursor to shape used when moving outlines.
*/
use_outlines_cursor()
{
change_cursor(XC_fleur);
}
/*
* use_normal_cursor - Change cursor to normal cursor shape.
*/
use_normal_cursor()
{
change_cursor(XC_left_ptr);
}
/*
* restore_prev_cursor - Restore cursor to the previously used shape.
*/
restore_prev_cursor()
{
struct cursor_stack_st *current;
struct dialog_list_st *dptr;
/* Is there anything to pop off the cursor stack? */
if (cursor_head == NULL)
return;
/* Get the current cursor (and pop it off the stack) */
current = cursor_head;
cursor_head = cursor_head->next;
XFreeCursor(display, current->cursor);
/* If cursor stack is now empty, revert to inherited cursor */
if (cursor_head == NULL) {
dptr = dialog_list_head;
while(dptr) {
XUndefineCursor(display, XtWindow(dptr->dialog_widget));
dptr = dptr->next;
}
XtFree((char *)current);
XSync(display, 0);
return;
}
/* Is previous cursor shape same as current current shape? */
if (cursor_head->shape == current->shape) {
XtFree((char *)current);
return;
}
XtFree((char *)current);
/* Change to previous cursor for all dialogs */
dptr = dialog_list_head;
while(dptr) {
XDefineCursor(display, XtWindow(dptr->dialog_widget),
cursor_head->cursor);
dptr = dptr->next;
}
XSync(display, 0);
}
/*
* add_dialog_to_list - Add the dialog referenced by "w_dialog" to the
* list of existing dialogs. This list is used
* by change_cursor() so that it can change the
* cursor for all existing dialogs.
*/
add_dialog_to_list(w_dialog)
Widget w_dialog;
{
struct dialog_list_st *dptr;
/* Don't need to do anything if dialog widget is already in list */
dptr = dialog_list_head;
while (dptr) {
if (w_dialog == dptr->dialog_widget)
return;
dptr = dptr->next;
}
dptr = XtNew(struct dialog_list_st);
dptr->dialog_widget = w_dialog;
dptr->prev = NULL;
dptr->next = dialog_list_head;
if (dialog_list_head)
dialog_list_head->prev = dptr;
dialog_list_head = dptr;
/* If non-inherited cursor currently in use, change cursor right now */
if (cursor_head) {
XSync(display, 0);
XDefineCursor(display, XtWindow(w_dialog), cursor_head->cursor);
XSync(display, 0);
}
}
/*
* remove_dialog_from_list - Remove the dialog referenced by "w_dialog" from
* the list of existing dialogs. This list is used
* by change_cursor() so that it can change the
* cursor for all existing dialogs.
*/
remove_dialog_from_list(w_dialog)
Widget w_dialog;
{
struct dialog_list_st *dptr;
/* Disconnect from linked list */
dptr = dialog_list_head;
while (dptr) {
if (dptr->dialog_widget == w_dialog) {
if (dptr->prev)
dptr->prev->next = dptr->next;
else
dialog_list_head = dptr->next;
if (dptr->next)
dptr->next->prev = dptr->prev;
XtFree((char *)dptr);
return;
}
dptr = dptr->next;
}
fatal_error("Bug in remove_dialog_from_list()");
}
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