[andy/viking.git] / src / vikcoordlayer.c

/*
 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
 *
 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <math.h>

#include "viking.h"
#include "vikcoordlayer_pixmap.h"

static VikCoordLayer *coord_layer_copy ( VikCoordLayer *vcl, gpointer vp );
static void coord_layer_marshall( VikCoordLayer *vcl, guint8 **data, gint *len );
static VikCoordLayer *coord_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp );
static gboolean coord_layer_set_param ( VikCoordLayer *vcl, guint16 id, VikLayerParamData data, VikViewport *vp );
static VikLayerParamData coord_layer_get_param ( VikCoordLayer *vcl, guint16 id );
static void coord_layer_update_gc ( VikCoordLayer *vcl, VikViewport *vp, const gchar *color );
static void coord_layer_post_read ( VikCoordLayer *vcl, VikViewport *vp );

VikLayerParamScale param_scales[] = {
  { 0.05, 60.0, 0.25, 10 },
  { 1, 10, 1, 0 },
};

VikLayerParam coord_layer_params[] = {
  { "color", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, "Color:", VIK_LAYER_WIDGET_ENTRY },
  { "min_inc", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_GROUP_NONE, "Minutes Width:", VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 0 },
  { "line_thickness", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, "Line Thickness:", VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 1 },
};


enum { PARAM_COLOR = 0, PARAM_MIN_INC, PARAM_LINE_THICKNESS, NUM_PARAMS };

VikLayerInterface vik_coord_layer_interface = {
  "Coord",
  &coordlayer_pixbuf,

  NULL,
  0,

  coord_layer_params,
  NUM_PARAMS,
  NULL,
  0,

  VIK_MENU_ITEM_ALL,

  (VikLayerFuncCreate)                  vik_coord_layer_create,
  (VikLayerFuncRealize)                 NULL,
  (VikLayerFuncPostRead)                coord_layer_post_read,
  (VikLayerFuncFree)                    vik_coord_layer_free,

  (VikLayerFuncProperties)              NULL,
  (VikLayerFuncDraw)                    vik_coord_layer_draw,
  (VikLayerFuncChangeCoordMode)         NULL,

  (VikLayerFuncSetMenuItemsSelection)   NULL,
  (VikLayerFuncGetMenuItemsSelection)   NULL,

  (VikLayerFuncAddMenuItems)            NULL,
  (VikLayerFuncSublayerAddMenuItems)    NULL,

  (VikLayerFuncSublayerRenameRequest)   NULL,
  (VikLayerFuncSublayerToggleVisible)   NULL,

  (VikLayerFuncCopy)                    coord_layer_copy,
  (VikLayerFuncMarshall)		coord_layer_marshall,
  (VikLayerFuncUnmarshall)		coord_layer_unmarshall,

  (VikLayerFuncSetParam)                coord_layer_set_param,
  (VikLayerFuncGetParam)                coord_layer_get_param,

  (VikLayerFuncReadFileData)            NULL,
  (VikLayerFuncWriteFileData)           NULL,

  (VikLayerFuncDeleteItem)              NULL,
  (VikLayerFuncCopyItem)                NULL,
  (VikLayerFuncPasteItem)               NULL,
  (VikLayerFuncFreeCopiedItem)          NULL,
  (VikLayerFuncDragDropRequest)		NULL,
};

struct _VikCoordLayer {
  VikLayer vl;
  GdkGC *gc;
  gdouble deg_inc;
  guint8 line_thickness;
  gchar *color;
};

GType vik_coord_layer_get_type ()
{
  static GType vcl_type = 0;

  if (!vcl_type)
  {
    static const GTypeInfo vcl_info =
    {
      sizeof (VikCoordLayerClass),
      NULL, /* base_init */
      NULL, /* base_finalize */
      NULL, /* class init */
      NULL, /* class_finalize */
      NULL, /* class_data */
      sizeof (VikCoordLayer),
      0,
      NULL /* instance init */
    };
    vcl_type = g_type_register_static ( VIK_LAYER_TYPE, "VikCoordLayer", &vcl_info, 0 );
  }

  return vcl_type;
}

static VikCoordLayer *coord_layer_copy ( VikCoordLayer *vcl, gpointer vp )
{
  VikCoordLayer *rv = vik_coord_layer_new ( );

  rv->color = g_strdup ( vcl->color );
  rv->deg_inc = vcl->deg_inc;
  rv->line_thickness = vcl->line_thickness;
  rv->gc = vcl->gc;
  g_object_ref ( rv->gc );
  return rv;
}

static void coord_layer_marshall( VikCoordLayer *vcl, guint8 **data, gint *len )
{
  vik_layer_marshall_params ( VIK_LAYER(vcl), data, len );
}

static VikCoordLayer *coord_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp )
{
  VikCoordLayer *rv = vik_coord_layer_new ( vvp );
  vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
  return rv;
}

gboolean coord_layer_set_param ( VikCoordLayer *vcl, guint16 id, VikLayerParamData data, VikViewport *vp )
{
  switch ( id )
  {
    case PARAM_COLOR: if ( vcl->color ) g_free ( vcl->color ); vcl->color = g_strdup ( data.s ); break;
    case PARAM_MIN_INC: vcl->deg_inc = data.d / 60.0; break;
    case PARAM_LINE_THICKNESS: if ( data.u >= 1 && data.u <= 15 ) vcl->line_thickness = data.u; break;
  }
  return TRUE;
}

static VikLayerParamData coord_layer_get_param ( VikCoordLayer *vcl, guint16 id )
{
  VikLayerParamData rv;
  switch ( id )
  {
    case PARAM_COLOR: rv.s = vcl->color ? vcl->color : ""; break;
    case PARAM_MIN_INC: rv.d = vcl->deg_inc * 60.0; break;
    case PARAM_LINE_THICKNESS: rv.i = vcl->line_thickness; break;
  }
  return rv;
}

static void coord_layer_post_read ( VikCoordLayer *vcl, VikViewport *vp )
{
  if ( vcl->gc )
    g_object_unref ( G_OBJECT(vcl->gc) );

  vcl->gc = vik_viewport_new_gc ( vp, vcl->color, vcl->line_thickness );
}

VikCoordLayer *vik_coord_layer_new ( )
{
  VikCoordLayer *vcl = VIK_COORD_LAYER ( g_object_new ( VIK_COORD_LAYER_TYPE, NULL ) );
  vik_layer_init ( VIK_LAYER(vcl), VIK_LAYER_COORD );

  vcl->gc = NULL;
  vcl->deg_inc = 1.0/60.0;
  vcl->line_thickness = 3;
  vcl->color = NULL;
  return vcl;
}

void vik_coord_layer_draw ( VikCoordLayer *vcl, gpointer data )
{
  VikViewport *vp = (VikViewport *) data;

  if ( !vcl->gc ) {
    return;
  }

  if ( vik_viewport_get_coord_mode(vp) != VIK_COORD_UTM ) 
  {
    VikCoord left, right, left2, right2;
    gdouble l, r, i, j;
    gint x1, y1, x2, y2, smod = 1, mmod = 1;
    gboolean mins = FALSE, secs = FALSE;
    GdkGC *dgc = vik_viewport_new_gc(vp, vcl->color, vcl->line_thickness);
    GdkGC *mgc = vik_viewport_new_gc(vp, vcl->color, MAX(vcl->line_thickness/2, 1));
    GdkGC *sgc = vik_viewport_new_gc(vp, vcl->color, MAX(vcl->line_thickness/5, 1));

    vik_viewport_screen_to_coord ( vp, 0, 0, &left );
    vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &right );
    vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &left2 );
    vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), vik_viewport_get_height(vp), &right2 );

#define CLINE(gc, c1, c2) { \
	  vik_viewport_coord_to_screen(vp, (c1), &x1, &y1);  \
	  vik_viewport_coord_to_screen(vp, (c2), &x2, &y2);  \
	  vik_viewport_draw_line (vp, (gc), x1, y1, x2, y2); \
	}

    l = left.east_west;
    r = right.east_west;
    if (60*fabs(l-r) < 4) {
      secs = TRUE;
      smod = MIN(6, (int)ceil(3600*fabs(l-r)/30.0));
    }
    if (fabs(l-r) < 4) {
      mins = TRUE;
      mmod = MIN(6, (int)ceil(60*fabs(l-r)/30.0));
    }
    for (i=floor(l*60); i<ceil(r*60); i+=1.0) {
      if (secs) {
	for (j=i*60+1; j<(i+1)*60; j+=1.0) {
	  left.east_west = j/3600.0;
	  left2.east_west = j/3600.0;
	  if ((int)j % smod == 0) CLINE(sgc, &left, &left2);
	}
      }
      if (mins) {
	left.east_west = i/60.0;
	left2.east_west = i/60.0;
	if ((int)i % mmod == 0) CLINE(mgc, &left, &left2);
      }
      if ((int)i % 60 == 0) {
	left.east_west = i/60.0;
	left2.east_west = i/60.0;
	CLINE(dgc, &left, &left2);
      }
    }

    vik_viewport_screen_to_coord ( vp, 0, 0, &left );
    l = left2.north_south;
    r = left.north_south;
    for (i=floor(l*60); i<ceil(r*60); i+=1.0) {
      if (secs) {
	for (j=i*60+1; j<(i+1)*60; j+=1.0) {
	  left.north_south = j/3600.0;
	  right.north_south = j/3600.0;
	  if ((int)j % smod == 0) CLINE(sgc, &left, &right);
	}
      }
      if (mins) {
	left.north_south = i/60.0;
	right.north_south = i/60.0;
	if ((int)i % mmod == 0) CLINE(mgc, &left, &right);
      }
      if ((int)i % 60 == 0) {
	left.north_south = i/60.0;
	right.north_south = i/60.0;
	CLINE(dgc, &left, &right);
      }
    }
#undef CLINE
    g_object_unref(dgc);
    g_object_unref(sgc);
    g_object_unref(mgc);
    return;
  }

  if ( vik_viewport_get_coord_mode(vp) == VIK_COORD_UTM ) 
  {
    const struct UTM *center = (const struct UTM *)vik_viewport_get_center ( vp );
    gdouble xmpp = vik_viewport_get_xmpp ( vp ), ympp = vik_viewport_get_ympp ( vp );
    guint16 width = vik_viewport_get_width ( vp ), height = vik_viewport_get_height ( vp );
    struct LatLon ll, ll2, min, max;
    double lon;
    int x1, x2;
    struct UTM utm;

    utm = *center;
    utm.northing = center->northing - ( ympp * height / 2 );

    a_coords_utm_to_latlon ( &utm, &ll );

    utm.northing = center->northing + ( ympp * height / 2 );

    a_coords_utm_to_latlon ( &utm, &ll2 );

    {
      /* find corner coords in lat/lon.
        start at whichever is less: top or bottom left lon. goto whichever more: top or bottom right lon
      */
      struct LatLon topleft, topright, bottomleft, bottomright;
      struct UTM temp_utm;
      temp_utm = *center;
      temp_utm.easting -= (width/2)*xmpp;
      temp_utm.northing += (height/2)*ympp;
      a_coords_utm_to_latlon ( &temp_utm, &topleft );
      temp_utm.easting += (width*xmpp);
      a_coords_utm_to_latlon ( &temp_utm, &topright );
      temp_utm.northing -= (height*ympp);
      a_coords_utm_to_latlon ( &temp_utm, &bottomright );
      temp_utm.easting -= (width*xmpp);
      a_coords_utm_to_latlon ( &temp_utm, &bottomleft );
      min.lon = (topleft.lon < bottomleft.lon) ? topleft.lon : bottomleft.lon;
      max.lon = (topright.lon > bottomright.lon) ? topright.lon : bottomright.lon;
      min.lat = (bottomleft.lat < bottomright.lat) ? bottomleft.lat : bottomright.lat;
      max.lat = (topleft.lat > topright.lat) ? topleft.lat : topright.lat;
    }

    lon = ((double) ((long) ((min.lon)/ vcl->deg_inc))) * vcl->deg_inc;
    ll.lon = ll2.lon = lon;

    for (; ll.lon <= max.lon; ll.lon+=vcl->deg_inc, ll2.lon+=vcl->deg_inc )
    {
      a_coords_latlon_to_utm ( &ll, &utm );
      x1 = ( (utm.easting - center->easting) / xmpp ) + (width / 2);
      a_coords_latlon_to_utm ( &ll2, &utm );
      x2 = ( (utm.easting - center->easting) / xmpp ) + (width / 2);
      vik_viewport_draw_line (vp, vcl->gc, x1, height, x2, 0);
    }

    utm = *center;
    utm.easting = center->easting - ( xmpp * width / 2 );

    a_coords_utm_to_latlon ( &utm, &ll );

    utm.easting = center->easting + ( xmpp * width / 2 );

    a_coords_utm_to_latlon ( &utm, &ll2 );

    /* really lat, just reusing a variable */
    lon = ((double) ((long) ((min.lat)/ vcl->deg_inc))) * vcl->deg_inc;
    ll.lat = ll2.lat = lon;

    for (; ll.lat <= max.lat ; ll.lat+=vcl->deg_inc, ll2.lat+=vcl->deg_inc )
    {
      a_coords_latlon_to_utm ( &ll, &utm );
      x1 = (height / 2) - ( (utm.northing - center->northing) / ympp );
      a_coords_latlon_to_utm ( &ll2, &utm );
      x2 = (height / 2) - ( (utm.northing - center->northing) / ympp );
      vik_viewport_draw_line (vp, vcl->gc, width, x2, 0, x1);
    }
  }
}

void vik_coord_layer_free ( VikCoordLayer *vcl )
{
  if ( vcl->gc != NULL )
    g_object_unref ( G_OBJECT(vcl->gc) );

  if ( vcl->color != NULL )
    g_free ( vcl->color );
}

static void coord_layer_update_gc ( VikCoordLayer *vcl, VikViewport *vp, const gchar *color )
{
  if ( vcl->color )
    g_free ( vcl->color );

  vcl->color = g_strdup ( color );

  if ( vcl->gc )
    g_object_unref ( G_OBJECT(vcl->gc) );

  vcl->gc = vik_viewport_new_gc ( vp, vcl->color, vcl->line_thickness );
}

VikCoordLayer *vik_coord_layer_create ( VikViewport *vp )
{
  VikCoordLayer *vcl = vik_coord_layer_new ();
  coord_layer_update_gc ( vcl, vp, "red" );
  return vcl;
}
Commit	Line	Data
50a14534 EB	1	/*
	2	* viking -- GPS Data and Topo Analyzer, Explorer, and Manager
	3	*
	4	* Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
80e450c0	21	#include <math.h>
50a14534 EB	22
	23	#include "viking.h"
	24	#include "vikcoordlayer_pixmap.h"
	25
	26	static VikCoordLayer coord_layer_copy ( VikCoordLayer vcl, gpointer vp );
0a6cab71 AF	27	static void coord_layer_marshall( VikCoordLayer vcl, guint8 data, gint len );
0a6cab71 AF	28	static VikCoordLayer coord_layer_unmarshall( guint8 data, gint len, VikViewport *vvp );
50a14534 EB	29	static gboolean coord_layer_set_param ( VikCoordLayer vcl, guint16 id, VikLayerParamData data, VikViewport vp );
	30	static VikLayerParamData coord_layer_get_param ( VikCoordLayer *vcl, guint16 id );
	31	static void coord_layer_update_gc ( VikCoordLayer vcl, VikViewport vp, const gchar *color );
	32	static void coord_layer_post_read ( VikCoordLayer vcl, VikViewport vp );
	33
	34	VikLayerParamScale param_scales[] = {
	35	{ 0.05, 60.0, 0.25, 10 },
	36	{ 1, 10, 1, 0 },
	37	};
	38
	39	VikLayerParam coord_layer_params[] = {
	40	{ "color", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, "Color:", VIK_LAYER_WIDGET_ENTRY },
	41	{ "min_inc", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_GROUP_NONE, "Minutes Width:", VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 0 },
	42	{ "line_thickness", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, "Line Thickness:", VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 1 },
	43	};
	44
	45
	46	enum { PARAM_COLOR = 0, PARAM_MIN_INC, PARAM_LINE_THICKNESS, NUM_PARAMS };
	47
	48	VikLayerInterface vik_coord_layer_interface = {
	49	"Coord",
	50	&coordlayer_pixbuf,
	51
	52	NULL,
	53	0,
	54
	55	coord_layer_params,
	56	NUM_PARAMS,
	57	NULL,
	58	0,
	59
5a4a28bf QT	60	VIK_MENU_ITEM_ALL,
5a4a28bf QT	61
50a14534 EB	62	(VikLayerFuncCreate) vik_coord_layer_create,
	63	(VikLayerFuncRealize) NULL,
	64	(VikLayerFuncPostRead) coord_layer_post_read,
	65	(VikLayerFuncFree) vik_coord_layer_free,
	66
	67	(VikLayerFuncProperties) NULL,
	68	(VikLayerFuncDraw) vik_coord_layer_draw,
	69	(VikLayerFuncChangeCoordMode) NULL,
	70
20c7a3a0 QT	71	(VikLayerFuncSetMenuItemsSelection) NULL,
	72	(VikLayerFuncGetMenuItemsSelection) NULL,
	73
50a14534 EB	74	(VikLayerFuncAddMenuItems) NULL,
	75	(VikLayerFuncSublayerAddMenuItems) NULL,
	76
	77	(VikLayerFuncSublayerRenameRequest) NULL,
	78	(VikLayerFuncSublayerToggleVisible) NULL,
	79
	80	(VikLayerFuncCopy) coord_layer_copy,
0a6cab71 AF	81	(VikLayerFuncMarshall) coord_layer_marshall,
0a6cab71 AF	82	(VikLayerFuncUnmarshall) coord_layer_unmarshall,
50a14534 EB	83
	84	(VikLayerFuncSetParam) coord_layer_set_param,
	85	(VikLayerFuncGetParam) coord_layer_get_param,
	86
	87	(VikLayerFuncReadFileData) NULL,
	88	(VikLayerFuncWriteFileData) NULL,
	89
33534cd8	90	(VikLayerFuncDeleteItem) NULL,
50a14534 EB	91	(VikLayerFuncCopyItem) NULL,
	92	(VikLayerFuncPasteItem) NULL,
	93	(VikLayerFuncFreeCopiedItem) NULL,
70a23263	94	(VikLayerFuncDragDropRequest) NULL,
50a14534 EB	95	};
	96
	97	struct _VikCoordLayer {
	98	VikLayer vl;
	99	GdkGC *gc;
	100	gdouble deg_inc;
	101	guint8 line_thickness;
	102	gchar *color;
	103	};
	104
	105	GType vik_coord_layer_get_type ()
	106	{
	107	static GType vcl_type = 0;
	108
	109	if (!vcl_type)
	110	{
	111	static const GTypeInfo vcl_info =
	112	{
	113	sizeof (VikCoordLayerClass),
	114	NULL, /* base_init */
	115	NULL, /* base_finalize */
	116	NULL, /* class init */
	117	NULL, /* class_finalize */
	118	NULL, /* class_data */
	119	sizeof (VikCoordLayer),
	120	0,
	121	NULL /* instance init */
	122	};
	123	vcl_type = g_type_register_static ( VIK_LAYER_TYPE, "VikCoordLayer", &vcl_info, 0 );
	124	}
	125
	126	return vcl_type;
	127	}
	128
	129	static VikCoordLayer coord_layer_copy ( VikCoordLayer vcl, gpointer vp )
	130	{
	131	VikCoordLayer *rv = vik_coord_layer_new ( );
	132
	133	rv->color = g_strdup ( vcl->color );
	134	rv->deg_inc = vcl->deg_inc;
	135	rv->line_thickness = vcl->line_thickness;
	136	rv->gc = vcl->gc;
	137	g_object_ref ( rv->gc );
	138	return rv;
	139	}
	140
0a6cab71 AF	141	static void coord_layer_marshall( VikCoordLayer vcl, guint8 data, gint len )
	142	{
	143	vik_layer_marshall_params ( VIK_LAYER(vcl), data, len );
	144	}
	145
	146	static VikCoordLayer coord_layer_unmarshall( guint8 data, gint len, VikViewport *vvp )
	147	{
	148	VikCoordLayer *rv = vik_coord_layer_new ( vvp );
	149	vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
	150	return rv;
	151	}
	152
50a14534 EB	153	gboolean coord_layer_set_param ( VikCoordLayer vcl, guint16 id, VikLayerParamData data, VikViewport vp )
	154	{
	155	switch ( id )
	156	{
	157	case PARAM_COLOR: if ( vcl->color ) g_free ( vcl->color ); vcl->color = g_strdup ( data.s ); break;
	158	case PARAM_MIN_INC: vcl->deg_inc = data.d / 60.0; break;
	159	case PARAM_LINE_THICKNESS: if ( data.u >= 1 && data.u <= 15 ) vcl->line_thickness = data.u; break;
	160	}
	161	return TRUE;
	162	}
	163
	164	static VikLayerParamData coord_layer_get_param ( VikCoordLayer *vcl, guint16 id )
	165	{
	166	VikLayerParamData rv;
	167	switch ( id )
	168	{
	169	case PARAM_COLOR: rv.s = vcl->color ? vcl->color : ""; break;
	170	case PARAM_MIN_INC: rv.d = vcl->deg_inc * 60.0; break;
	171	case PARAM_LINE_THICKNESS: rv.i = vcl->line_thickness; break;
	172	}
	173	return rv;
	174	}
	175
	176	static void coord_layer_post_read ( VikCoordLayer vcl, VikViewport vp )
	177	{
	178	if ( vcl->gc )
	179	g_object_unref ( G_OBJECT(vcl->gc) );
	180
	181	vcl->gc = vik_viewport_new_gc ( vp, vcl->color, vcl->line_thickness );
	182	}
	183
	184	VikCoordLayer *vik_coord_layer_new ( )
	185	{
	186	VikCoordLayer *vcl = VIK_COORD_LAYER ( g_object_new ( VIK_COORD_LAYER_TYPE, NULL ) );
	187	vik_layer_init ( VIK_LAYER(vcl), VIK_LAYER_COORD );
	188
	189	vcl->gc = NULL;
	190	vcl->deg_inc = 1.0/60.0;
	191	vcl->line_thickness = 3;
	192	vcl->color = NULL;
	193	return vcl;
	194	}
	195
	196	void vik_coord_layer_draw ( VikCoordLayer *vcl, gpointer data )
	197	{
	198	VikViewport vp = (VikViewport ) data;
80e450c0 AF	199
80e450c0 AF	200	if ( !vcl->gc ) {
50a14534	201	return;
80e450c0 AF	202	}
	203
	204	if ( vik_viewport_get_coord_mode(vp) != VIK_COORD_UTM )
	205	{
	206	VikCoord left, right, left2, right2;
	207	gdouble l, r, i, j;
	208	gint x1, y1, x2, y2, smod = 1, mmod = 1;
	209	gboolean mins = FALSE, secs = FALSE;
	210	GdkGC *dgc = vik_viewport_new_gc(vp, vcl->color, vcl->line_thickness);
	211	GdkGC *mgc = vik_viewport_new_gc(vp, vcl->color, MAX(vcl->line_thickness/2, 1));
	212	GdkGC *sgc = vik_viewport_new_gc(vp, vcl->color, MAX(vcl->line_thickness/5, 1));
	213
	214	vik_viewport_screen_to_coord ( vp, 0, 0, &left );
	215	vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &right );
	216	vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &left2 );
	217	vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), vik_viewport_get_height(vp), &right2 );
	218
	219	#define CLINE(gc, c1, c2) { \
	220	vik_viewport_coord_to_screen(vp, (c1), &x1, &y1); \
	221	vik_viewport_coord_to_screen(vp, (c2), &x2, &y2); \
	222	vik_viewport_draw_line (vp, (gc), x1, y1, x2, y2); \
	223	}
	224
	225	l = left.east_west;
	226	r = right.east_west;
	227	if (60*fabs(l-r) < 4) {
	228	secs = TRUE;
	229	smod = MIN(6, (int)ceil(3600*fabs(l-r)/30.0));
	230	}
	231	if (fabs(l-r) < 4) {
	232	mins = TRUE;
	233	mmod = MIN(6, (int)ceil(60*fabs(l-r)/30.0));
	234	}
	235	for (i=floor(l60); i<ceil(r60); i+=1.0) {
	236	if (secs) {
	237	for (j=i60+1; j<(i+1)60; j+=1.0) {
	238	left.east_west = j/3600.0;
	239	left2.east_west = j/3600.0;
	240	if ((int)j % smod == 0) CLINE(sgc, &left, &left2);
	241	}
	242	}
	243	if (mins) {
	244	left.east_west = i/60.0;
	245	left2.east_west = i/60.0;
	246	if ((int)i % mmod == 0) CLINE(mgc, &left, &left2);
	247	}
	248	if ((int)i % 60 == 0) {
	249	left.east_west = i/60.0;
	250	left2.east_west = i/60.0;
	251	CLINE(dgc, &left, &left2);
	252	}
	253	}
	254
	255	vik_viewport_screen_to_coord ( vp, 0, 0, &left );
	256	l = left2.north_south;
	257	r = left.north_south;
	258	for (i=floor(l60); i<ceil(r60); i+=1.0) {
	259	if (secs) {
	260	for (j=i60+1; j<(i+1)60; j+=1.0) {
	261	left.north_south = j/3600.0;
	262	right.north_south = j/3600.0;
	263	if ((int)j % smod == 0) CLINE(sgc, &left, &right);
	264	}
	265	}
266	if (mins) {
267	left.north_south = i/60.0;
268	right.north_south = i/60.0;
269	if ((int)i % mmod == 0) CLINE(mgc, &left, &right);
270	}
271	if ((int)i % 60 == 0) {
272	left.north_south = i/60.0;
273	right.north_south = i/60.0;
274	CLINE(dgc, &left, &right);
275	}
276	}
277	#undef CLINE
278	g_object_unref(dgc);
279	g_object_unref(sgc);
280	g_object_unref(mgc);
281	return;
282	}
283
284	if ( vik_viewport_get_coord_mode(vp) == VIK_COORD_UTM )
50a14534 EB	285	{
	286	const struct UTM center = (const struct UTM )vik_viewport_get_center ( vp );
	287	gdouble xmpp = vik_viewport_get_xmpp ( vp ), ympp = vik_viewport_get_ympp ( vp );
	288	guint16 width = vik_viewport_get_width ( vp ), height = vik_viewport_get_height ( vp );
	289	struct LatLon ll, ll2, min, max;
	290	double lon;
	291	int x1, x2;
	292	struct UTM utm;
	293
	294	utm = *center;
	295	utm.northing = center->northing - ( ympp * height / 2 );
	296
	297	a_coords_utm_to_latlon ( &utm, &ll );
	298
	299	utm.northing = center->northing + ( ympp * height / 2 );
	300
	301	a_coords_utm_to_latlon ( &utm, &ll2 );
	302
	303	{
	304	/* find corner coords in lat/lon.
	305	start at whichever is less: top or bottom left lon. goto whichever more: top or bottom right lon
	306	*/
	307	struct LatLon topleft, topright, bottomleft, bottomright;
	308	struct UTM temp_utm;
	309	temp_utm = *center;
	310	temp_utm.easting -= (width/2)*xmpp;
	311	temp_utm.northing += (height/2)*ympp;
	312	a_coords_utm_to_latlon ( &temp_utm, &topleft );
	313	temp_utm.easting += (width*xmpp);
	314	a_coords_utm_to_latlon ( &temp_utm, &topright );
	315	temp_utm.northing -= (height*ympp);
	316	a_coords_utm_to_latlon ( &temp_utm, &bottomright );
	317	temp_utm.easting -= (width*xmpp);
	318	a_coords_utm_to_latlon ( &temp_utm, &bottomleft );
	319	min.lon = (topleft.lon < bottomleft.lon) ? topleft.lon : bottomleft.lon;
	320	max.lon = (topright.lon > bottomright.lon) ? topright.lon : bottomright.lon;
	321	min.lat = (bottomleft.lat < bottomright.lat) ? bottomleft.lat : bottomright.lat;
	322	max.lat = (topleft.lat > topright.lat) ? topleft.lat : topright.lat;
	323	}
	324
	325	lon = ((double) ((long) ((min.lon)/ vcl->deg_inc))) * vcl->deg_inc;
	326	ll.lon = ll2.lon = lon;
	327
	328	for (; ll.lon <= max.lon; ll.lon+=vcl->deg_inc, ll2.lon+=vcl->deg_inc )
	329	{
	330	a_coords_latlon_to_utm ( &ll, &utm );
	331	x1 = ( (utm.easting - center->easting) / xmpp ) + (width / 2);
	332	a_coords_latlon_to_utm ( &ll2, &utm );
	333	x2 = ( (utm.easting - center->easting) / xmpp ) + (width / 2);
	334	vik_viewport_draw_line (vp, vcl->gc, x1, height, x2, 0);
	335	}
	336
	337	utm = *center;
	338	utm.easting = center->easting - ( xmpp * width / 2 );
	339
	340	a_coords_utm_to_latlon ( &utm, &ll );
	341
	342	utm.easting = center->easting + ( xmpp * width / 2 );
	343
	344	a_coords_utm_to_latlon ( &utm, &ll2 );
	345
	346	/* really lat, just reusing a variable */
	347	lon = ((double) ((long) ((min.lat)/ vcl->deg_inc))) * vcl->deg_inc;
	348	ll.lat = ll2.lat = lon;
349
350	for (; ll.lat <= max.lat ; ll.lat+=vcl->deg_inc, ll2.lat+=vcl->deg_inc )
351	{
352	a_coords_latlon_to_utm ( &ll, &utm );
353	x1 = (height / 2) - ( (utm.northing - center->northing) / ympp );
354	a_coords_latlon_to_utm ( &ll2, &utm );
355	x2 = (height / 2) - ( (utm.northing - center->northing) / ympp );
356	vik_viewport_draw_line (vp, vcl->gc, width, x2, 0, x1);
357	}
358	}
359	}
360
361	void vik_coord_layer_free ( VikCoordLayer *vcl )
362	{
363	if ( vcl->gc != NULL )
364	g_object_unref ( G_OBJECT(vcl->gc) );
365
366	if ( vcl->color != NULL )
367	g_free ( vcl->color );
368	}
369
370	static void coord_layer_update_gc ( VikCoordLayer vcl, VikViewport vp, const gchar *color )
371	{
372	if ( vcl->color )
373	g_free ( vcl->color );
374
375	vcl->color = g_strdup ( color );
376
377	if ( vcl->gc )
378	g_object_unref ( G_OBJECT(vcl->gc) );
379
380	vcl->gc = vik_viewport_new_gc ( vp, vcl->color, vcl->line_thickness );
381	}
382
383	VikCoordLayer vik_coord_layer_create ( VikViewport vp )
384	{
385	VikCoordLayer *vcl = vik_coord_layer_new ();
386	coord_layer_update_gc ( vcl, vp, "red" );
387	return vcl;
388	}
389