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/*
* OverlapMan.h -- Track label overlap avoidance manager header file
*
* Authors :
* Creation date :
*
* $Id$
*/
/*
* Copyright (c) 1993 - 1999 CENA --
*
* This code is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This code 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this code; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _OverlapMan_h
#define _OverlapMan_h
#include <string.h>
#include <math.h>
/*
* This is the interface with the zinc widget. To substitute
* a different overlap manager, it is necessary to conform to
* this API.
*/
void
OmRegister(void *w,
void *(*_fnext_track)(void *ptr,
void *item,
int *x, int *y,
int *sv_dx, int *sv_dy,
/* Fri Oct 13 15:16:13 2000
int *label_x, int *label_y,
int *label_width, int *label_height,
*/
int *rho, int *theta,
int *visibility),
void (*_fset_label_angle)(void *ptr, void *item, int theta),
void (*_fquery_label_pos)(void *ptr, void *item, int theta,
int *x, int *y, int *w, int *h));
void
OmUnregister(void *w);
void
OmProcessOverlap(void *zinc,
int width,
int height,
double scale);
/*
* These are overlap manager public functions used
* to set various parameters controlling the algorithm
* behavior.
*/
void
OmSetParam(double repulsion,
double repulsion_bearing,
double friction,
double best_position_attraction,
double screen_edge_repulsion);
void
OmGetParam(double *repulsion,
double *repulsion_bearing,
double *friction,
double *best_position_attraction,
double *screen_edge_repulsion);
void
OmGetMinParam(double *min_repulsion,
double *min_repulsion_bearing,
double *min_friction,
double *min_best_position_attraction,
double *min_screen_edge_repulsion);
void
OmGetMaxParam(double *max_repulsion,
double *max_repulsion_bearing,
double *max_friction,
double *max_best_position_attraction,
double *max_screen_edge_repulsion);
#endif /* _OverlapMan_h */
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