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#ifndef lint
static char SccsId[] = "%W% %G%";
#endif
/* Module: csrdraw.c (Cursor Draw)
* Purpose: Display and draw the software cursor
* Subroutine: disp_cursor() returns: void
* Subroutine: erase_cursor() returns: void
* Subroutine: draw_cursor() returns: void
* Subroutine: draw_annuli() returns: void
* Subroutine: draw_point()
* Subroutine: erase_point()
* Xlib calls: XDrawLines(), XDrawRectangles()
* Copyright: 1989 Smithsonian Astrophysical Observatory
* You may do anything you like with this file except remove
* this copyright. The Smithsonian Astrophysical Observatory
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
* Modified: {0} Michael VanHilst initial version 4 June 1989
* {1} MVH added text cursor support 1 Jan 1991
* {n} <who> -- <does what> -- <when>
*/
#include <stdio.h> /* stderr, NULL, etc. */
#include <X11/Xlib.h> /* X window stuff */
#include <X11/Xutil.h> /* X window manager stuff */
#include "hfiles/color.h" /* Cursor colors needed by Cursor.h */
#include "hfiles/cursor.h" /* Define cursor parameter structures */
#include "hfiles/constant.h" /* Define codes */
extern struct colorRec color; /* Need to know color.gcset */
#ifdef ANSIC
/* Exported declarations must be centralized before ANSI C can be used */
void disp_cursor( struct cursorRec *cursor);
void erase_cursor( struct cursorRec *cursor);
void draw_cursor( struct cursorRec *cursor, GCspec *draw);
void draw_annuli( struct cursorRec *cursor, GCspec *draw);
#else
GC set_gc();
void draw_annuli(), draw_cursor(), draw_point(), erase_point();
void draw_textcursor();
#endif
/* Subroutine: disp_cursor
* Purpose: Draw the software cursor, if it is to be visible
*/
#ifdef ANSIC
void disp_cursor ( struct cursorRec *cursor )
#else
void disp_cursor ( cursor )
struct cursorRec *cursor;
#endif
{
/* If there are annuli, draw them */
if( cursor->annuli ) {
draw_annuli(cursor, cursor->draw);
} else {
if( cursor->point_cnt || cursor->rectangle_cnt )
draw_cursor(cursor, cursor->draw);
}
}
/* Subroutine: erase_cursor
* Purpose: Undraw the cursor
*/
#ifdef ANSIC
void erase_cursor ( struct cursorRec *cursor )
#else
void erase_cursor ( cursor )
struct cursorRec *cursor;
#endif
{
if( cursor->point_cnt || cursor->rectangle_cnt )
draw_cursor(cursor, &color.gcset.undraw);
}
/* Subroutine: draw_cursor
* Purpose: Draw a cursor as indicated
*/
#ifdef ANSIC
void draw_cursor ( struct cursorRec *cursor, GCspec *draw )
#else
void draw_cursor ( cursor, draw )
struct cursorRec *cursor;
GCspec *draw;
#endif
{
GC gc;
if( cursor->type == COP_Text ) {
draw_textcursor(cursor, draw);
return;
}
gc = set_gc(draw);
/* Draw the cursor */
if( cursor->point_cnt > 0 )
XDrawLines(cursor->win.display, cursor->win.ID, gc,
cursor->points, cursor->point_cnt, CoordModeOrigin);
else if( cursor->point_cnt < 0 )
XDrawSegments(cursor->win.display, cursor->win.ID, gc,
(XSegment *)cursor->points, -cursor->point_cnt);
if( cursor->rectangle_cnt )
XDrawRectangles(cursor->win.display, cursor->win.ID, gc,
cursor->rectangles, cursor->rectangle_cnt);
}
/* Subroutine: draw_annuli
* Purpose: Draw all annuli in specified color and function
*/
#ifdef ANSIC
void draw_annuli ( struct cursorRec *cursor, GCspec *draw )
#else
void draw_annuli ( cursor, draw )
struct cursorRec *cursor;
GCspec *draw;
#endif
{
struct cursorRec *annulus;
GC gc;
gc = set_gc(draw);
/* Draw the cursor */
annulus = cursor->next_annulus;
while( annulus != NULL ) {
if( annulus->point_cnt )
XDrawLines(annulus->win.display, annulus->win.ID, gc,
annulus->points, annulus->point_cnt, CoordModeOrigin);
annulus = annulus->next_annulus;
}
}
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