void
reshaping_arc(int x, int y)
{
elastic_arclink();
adjust_pos(x, y, cur_a->point[movedpoint_num].x,
cur_a->point[movedpoint_num].y, &cur_x, &cur_y);
if (movedpoint_num == 1) {
/* middle point */
arc_msg(cur_a->point[0].x, cur_a->point[0].y,
cur_a->point[2].x, cur_a->point[2].y,
cur_x, cur_y);
} else {
/* end point */
altlength_msg(MSG_LENGTH,cur_a->point[1].x,cur_a->point[1].y);
}
elastic_arclink();
}
static void
cancel_movedarcpoint(void)
{
canvas_ref_proc = canvas_locmove_proc = null_proc;
elastic_arclink();
/* erase last lengths if appres.showlengths is true */
erase_lengths();
/* turn back on all relevant markers */
update_markers(new_objmask);
wrapup_movepoint();
}
static void
init_arcpointmoving(void)
{
set_action_on();
/* turn off all markers */
update_markers(0);
cur_x = cur_a->point[movedpoint_num].x;
cur_y = cur_a->point[movedpoint_num].y;
set_cursor(crosshair_cursor);
canvas_locmove_proc = reshaping_arc;
canvas_ref_proc = elastic_arclink;
canvas_leftbut_proc = fix_movedarcpoint;
canvas_rightbut_proc = cancel_movedarcpoint;
elastic_arclink();
/* show current length(s) */
(canvas_locmove_proc)(cur_x, cur_y);
}
static void
fix_movedarcpoint(int x, int y)
{
canvas_ref_proc = canvas_locmove_proc = null_proc;
elastic_arclink();
/* erase last lengths if appres.showlengths is true */
erase_lengths();
adjust_pos(x, y, cur_a->point[movedpoint_num].x,
cur_a->point[movedpoint_num].y, &x, &y);
new_a = copy_arc(cur_a);
relocate_arcpoint(new_a, x, y, movedpoint_num);
change_arc(cur_a, new_a);
/* redraw anything under the old arc */
redisplay_arc(cur_a);
/* and the new one */
redisplay_arc(new_a);
/* turn back on all relevant markers */
update_markers(new_objmask);
wrapup_movepoint();
}
