[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
 *
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_MATH_H
#include <math.h>
#endif
#include <glib/gi18n.h>

#include "viking.h"
#include "icons/icons.h"

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 ( VikLayer *vl, VikViewport *vp, gboolean from_file );

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

static VikLayerParam coord_layer_params[] = {
  { "color", VIK_LAYER_PARAM_COLOR, VIK_LAYER_GROUP_NONE, N_("Color:"), VIK_LAYER_WIDGET_COLOR, 0 },
  { "min_inc", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_GROUP_NONE, N_("Minutes Width:"), VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 0 },
  { "line_thickness", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("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",
  &vikcoordlayer_pixbuf,

  NULL,
  0,

  coord_layer_params,
  NUM_PARAMS,
  NULL,
  0,

  VIK_MENU_ITEM_ALL,

  (VikLayerFuncCreate)                  vik_coord_layer_create,
  (VikLayerFuncRealize)                 NULL,
                                        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,

  (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;
  GdkColor *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 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 ) gdk_color_free ( vcl->color ); vcl->color = gdk_color_copy( &(data.c)); 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:
      if (vcl->color)
      {
        rv.c.pixel = vcl->color->pixel;
        rv.c.red = vcl->color->red;
        rv.c.green = vcl->color->green;
        rv.c.blue = vcl->color->blue;
      }
      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 ( VikLayer *vl, VikViewport *vp, gboolean from_file )
{
  VikCoordLayer *vcl = VIK_COORD_LAYER(vl);
  if ( vcl->gc )
    g_object_unref ( G_OBJECT(vcl->gc) );

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

}

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

  InitColor.pixel = 0;
  InitColor.red = 65535;
  InitColor.green = 65535;
  InitColor.blue = 65535;

  vcl->gc = NULL;
  vcl->deg_inc = 1.0/60.0;
  vcl->line_thickness = 3;
  vcl->color = gdk_color_copy (&InitColor);
  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_from_color(vp, vcl->color, vcl->line_thickness);
    GdkGC *mgc = vik_viewport_new_gc_from_color(vp, vcl->color, MAX(vcl->line_thickness/2, 1));
    GdkGC *sgc = vik_viewport_new_gc_from_color(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 )
    gdk_color_free ( vcl->color );
}

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

  gdk_color_parse( color, &InitColor);
  vcl->color = gdk_color_copy( &InitColor );

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

  vcl->gc = vik_viewport_new_gc_from_color ( 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	*/
4c77d5e0 GB	21	#ifdef HAVE_CONFIG_H
	22	#include "config.h"
	23	#endif
8c00358d GB	24
8c00358d GB	25	#ifdef HAVE_MATH_H
80e450c0	26	#include <math.h>
8c00358d	27	#endif
4c77d5e0	28	#include <glib/gi18n.h>
50a14534 EB	29
50a14534 EB	30	#include "viking.h"
5bfafde9	31	#include "icons/icons.h"
50a14534	32
0a6cab71 AF	33	static void coord_layer_marshall( VikCoordLayer vcl, guint8 data, gint len );
0a6cab71 AF	34	static VikCoordLayer coord_layer_unmarshall( guint8 data, gint len, VikViewport *vvp );
50a14534 EB	35	static gboolean coord_layer_set_param ( VikCoordLayer vcl, guint16 id, VikLayerParamData data, VikViewport vp );
	36	static VikLayerParamData coord_layer_get_param ( VikCoordLayer *vcl, guint16 id );
	37	static void coord_layer_update_gc ( VikCoordLayer vcl, VikViewport vp, const gchar *color );
07059501	38	static void coord_layer_post_read ( VikLayer vl, VikViewport vp, gboolean from_file );
50a14534	39
ad0a8c2d	40	static VikLayerParamScale param_scales[] = {
50a14534 EB	41	{ 0.05, 60.0, 0.25, 10 },
	42	{ 1, 10, 1, 0 },
	43	};
	44
ad0a8c2d	45	static VikLayerParam coord_layer_params[] = {
ac68cea3	46	{ "color", VIK_LAYER_PARAM_COLOR, VIK_LAYER_GROUP_NONE, N_("Color:"), VIK_LAYER_WIDGET_COLOR, 0 },
4c77d5e0 GB	47	{ "min_inc", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_GROUP_NONE, N_("Minutes Width:"), VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 0 },
4c77d5e0 GB	48	{ "line_thickness", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Line Thickness:"), VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 1 },
50a14534 EB	49	};
	50
	51
	52	enum { PARAM_COLOR = 0, PARAM_MIN_INC, PARAM_LINE_THICKNESS, NUM_PARAMS };
	53
	54	VikLayerInterface vik_coord_layer_interface = {
	55	"Coord",
5bfafde9	56	&vikcoordlayer_pixbuf,
50a14534 EB	57
	58	NULL,
	59	0,
	60
	61	coord_layer_params,
	62	NUM_PARAMS,
	63	NULL,
	64	0,
	65
5a4a28bf QT	66	VIK_MENU_ITEM_ALL,
5a4a28bf QT	67
50a14534 EB	68	(VikLayerFuncCreate) vik_coord_layer_create,
50a14534 EB	69	(VikLayerFuncRealize) NULL,
94933cb8	70	coord_layer_post_read,
50a14534 EB	71	(VikLayerFuncFree) vik_coord_layer_free,
	72
	73	(VikLayerFuncProperties) NULL,
	74	(VikLayerFuncDraw) vik_coord_layer_draw,
	75	(VikLayerFuncChangeCoordMode) NULL,
	76
20c7a3a0 QT	77	(VikLayerFuncSetMenuItemsSelection) NULL,
	78	(VikLayerFuncGetMenuItemsSelection) NULL,
	79
50a14534 EB	80	(VikLayerFuncAddMenuItems) NULL,
	81	(VikLayerFuncSublayerAddMenuItems) NULL,
	82
	83	(VikLayerFuncSublayerRenameRequest) NULL,
	84	(VikLayerFuncSublayerToggleVisible) NULL,
	85
0a6cab71 AF	86	(VikLayerFuncMarshall) coord_layer_marshall,
0a6cab71 AF	87	(VikLayerFuncUnmarshall) coord_layer_unmarshall,
50a14534 EB	88
	89	(VikLayerFuncSetParam) coord_layer_set_param,
	90	(VikLayerFuncGetParam) coord_layer_get_param,
	91
	92	(VikLayerFuncReadFileData) NULL,
	93	(VikLayerFuncWriteFileData) NULL,
	94
33534cd8	95	(VikLayerFuncDeleteItem) NULL,
50a14534 EB	96	(VikLayerFuncCopyItem) NULL,
	97	(VikLayerFuncPasteItem) NULL,
	98	(VikLayerFuncFreeCopiedItem) NULL,
70a23263	99	(VikLayerFuncDragDropRequest) NULL,
50a14534 EB	100	};
	101
	102	struct _VikCoordLayer {
	103	VikLayer vl;
	104	GdkGC *gc;
	105	gdouble deg_inc;
	106	guint8 line_thickness;
ac68cea3	107	GdkColor *color;
50a14534 EB	108	};
	109
	110	GType vik_coord_layer_get_type ()
	111	{
	112	static GType vcl_type = 0;
	113
	114	if (!vcl_type)
	115	{
	116	static const GTypeInfo vcl_info =
	117	{
	118	sizeof (VikCoordLayerClass),
	119	NULL, /* base_init */
	120	NULL, /* base_finalize */
	121	NULL, /* class init */
	122	NULL, /* class_finalize */
	123	NULL, /* class_data */
	124	sizeof (VikCoordLayer),
	125	0,
	126	NULL /* instance init */
	127	};
	128	vcl_type = g_type_register_static ( VIK_LAYER_TYPE, "VikCoordLayer", &vcl_info, 0 );
	129	}
	130
	131	return vcl_type;
	132	}
	133
0a6cab71 AF	134	static void coord_layer_marshall( VikCoordLayer vcl, guint8 data, gint len )
	135	{
	136	vik_layer_marshall_params ( VIK_LAYER(vcl), data, len );
	137	}
	138
	139	static VikCoordLayer coord_layer_unmarshall( guint8 data, gint len, VikViewport *vvp )
	140	{
	141	VikCoordLayer *rv = vik_coord_layer_new ( vvp );
	142	vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
	143	return rv;
	144	}
	145
50a14534 EB	146	gboolean coord_layer_set_param ( VikCoordLayer vcl, guint16 id, VikLayerParamData data, VikViewport vp )
	147	{
	148	switch ( id )
	149	{
ac68cea3	150	case PARAM_COLOR: if ( vcl->color ) gdk_color_free ( vcl->color ); vcl->color = gdk_color_copy( &(data.c)); break;
50a14534 EB	151	case PARAM_MIN_INC: vcl->deg_inc = data.d / 60.0; break;
	152	case PARAM_LINE_THICKNESS: if ( data.u >= 1 && data.u <= 15 ) vcl->line_thickness = data.u; break;
	153	}
	154	return TRUE;
	155	}
	156
	157	static VikLayerParamData coord_layer_get_param ( VikCoordLayer *vcl, guint16 id )
	158	{
	159	VikLayerParamData rv;
	160	switch ( id )
	161	{
ac68cea3 MA	162	case PARAM_COLOR:
	163	if (vcl->color)
	164	{
	165	rv.c.pixel = vcl->color->pixel;
	166	rv.c.red = vcl->color->red;
	167	rv.c.green = vcl->color->green;
	168	rv.c.blue = vcl->color->blue;
	169	}
	170	break;
50a14534 EB	171	case PARAM_MIN_INC: rv.d = vcl->deg_inc * 60.0; break;
	172	case PARAM_LINE_THICKNESS: rv.i = vcl->line_thickness; break;
	173	}
	174	return rv;
	175	}
	176
07059501	177	static void coord_layer_post_read ( VikLayer vl, VikViewport vp, gboolean from_file )
50a14534	178	{
94933cb8	179	VikCoordLayer *vcl = VIK_COORD_LAYER(vl);
50a14534 EB	180	if ( vcl->gc )
	181	g_object_unref ( G_OBJECT(vcl->gc) );
	182
ac68cea3 MA	183	vcl->gc = vik_viewport_new_gc_from_color ( vp, vcl->color, vcl->line_thickness );
ac68cea3 MA	184
50a14534 EB	185	}
	186
	187	VikCoordLayer *vik_coord_layer_new ( )
	188	{
ac68cea3 MA	189	GdkColor InitColor;
ac68cea3 MA	190
50a14534 EB	191	VikCoordLayer *vcl = VIK_COORD_LAYER ( g_object_new ( VIK_COORD_LAYER_TYPE, NULL ) );
	192	vik_layer_init ( VIK_LAYER(vcl), VIK_LAYER_COORD );
	193
ac68cea3	194	InitColor.pixel = 0;
3750ef3e GB	195	InitColor.red = 65535;
	196	InitColor.green = 65535;
	197	InitColor.blue = 65535;
ac68cea3	198
50a14534 EB	199	vcl->gc = NULL;
	200	vcl->deg_inc = 1.0/60.0;
	201	vcl->line_thickness = 3;
ac68cea3	202	vcl->color = gdk_color_copy (&InitColor);
50a14534 EB	203	return vcl;
	204	}
	205
	206	void vik_coord_layer_draw ( VikCoordLayer *vcl, gpointer data )
	207	{
	208	VikViewport vp = (VikViewport ) data;
80e450c0 AF	209
80e450c0 AF	210	if ( !vcl->gc ) {
50a14534	211	return;
80e450c0 AF	212	}
	213
	214	if ( vik_viewport_get_coord_mode(vp) != VIK_COORD_UTM )
	215	{
	216	VikCoord left, right, left2, right2;
	217	gdouble l, r, i, j;
	218	gint x1, y1, x2, y2, smod = 1, mmod = 1;
	219	gboolean mins = FALSE, secs = FALSE;
ac68cea3 MA	220	GdkGC *dgc = vik_viewport_new_gc_from_color(vp, vcl->color, vcl->line_thickness);
	221	GdkGC *mgc = vik_viewport_new_gc_from_color(vp, vcl->color, MAX(vcl->line_thickness/2, 1));
	222	GdkGC *sgc = vik_viewport_new_gc_from_color(vp, vcl->color, MAX(vcl->line_thickness/5, 1));
80e450c0 AF	223
	224	vik_viewport_screen_to_coord ( vp, 0, 0, &left );
	225	vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &right );
	226	vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &left2 );
	227	vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), vik_viewport_get_height(vp), &right2 );
	228
	229	#define CLINE(gc, c1, c2) { \
	230	vik_viewport_coord_to_screen(vp, (c1), &x1, &y1); \
	231	vik_viewport_coord_to_screen(vp, (c2), &x2, &y2); \
	232	vik_viewport_draw_line (vp, (gc), x1, y1, x2, y2); \
	233	}
	234
	235	l = left.east_west;
	236	r = right.east_west;
	237	if (60*fabs(l-r) < 4) {
	238	secs = TRUE;
	239	smod = MIN(6, (int)ceil(3600*fabs(l-r)/30.0));
	240	}
	241	if (fabs(l-r) < 4) {
	242	mins = TRUE;
	243	mmod = MIN(6, (int)ceil(60*fabs(l-r)/30.0));
	244	}
	245	for (i=floor(l60); i<ceil(r60); i+=1.0) {
	246	if (secs) {
	247	for (j=i60+1; j<(i+1)60; j+=1.0) {
	248	left.east_west = j/3600.0;
	249	left2.east_west = j/3600.0;
	250	if ((int)j % smod == 0) CLINE(sgc, &left, &left2);
	251	}
	252	}
	253	if (mins) {
	254	left.east_west = i/60.0;
	255	left2.east_west = i/60.0;
	256	if ((int)i % mmod == 0) CLINE(mgc, &left, &left2);
	257	}
	258	if ((int)i % 60 == 0) {
	259	left.east_west = i/60.0;
	260	left2.east_west = i/60.0;
	261	CLINE(dgc, &left, &left2);
	262	}
	263	}
	264
	265	vik_viewport_screen_to_coord ( vp, 0, 0, &left );
	266	l = left2.north_south;
	267	r = left.north_south;
	268	for (i=floor(l60); i<ceil(r60); i+=1.0) {
	269	if (secs) {
	270	for (j=i60+1; j<(i+1)60; j+=1.0) {
	271	left.north_south = j/3600.0;
	272	right.north_south = j/3600.0;
	273	if ((int)j % smod == 0) CLINE(sgc, &left, &right);
	274	}
	275	}
	276	if (mins) {
	277	left.north_south = i/60.0;
	278	right.north_south = i/60.0;
	279	if ((int)i % mmod == 0) CLINE(mgc, &left, &right);
	280	}
	281	if ((int)i % 60 == 0) {
	282	left.north_south = i/60.0;
	283	right.north_south = i/60.0;
	284	CLINE(dgc, &left, &right);
	285	}
	286	}
287	#undef CLINE
288	g_object_unref(dgc);
289	g_object_unref(sgc);
290	g_object_unref(mgc);
291	return;
292	}
293
294	if ( vik_viewport_get_coord_mode(vp) == VIK_COORD_UTM )
50a14534 EB	295	{
	296	const struct UTM center = (const struct UTM )vik_viewport_get_center ( vp );
	297	gdouble xmpp = vik_viewport_get_xmpp ( vp ), ympp = vik_viewport_get_ympp ( vp );
	298	guint16 width = vik_viewport_get_width ( vp ), height = vik_viewport_get_height ( vp );
	299	struct LatLon ll, ll2, min, max;
	300	double lon;
	301	int x1, x2;
	302	struct UTM utm;
	303
	304	utm = *center;
	305	utm.northing = center->northing - ( ympp * height / 2 );
	306
	307	a_coords_utm_to_latlon ( &utm, &ll );
	308
	309	utm.northing = center->northing + ( ympp * height / 2 );
	310
	311	a_coords_utm_to_latlon ( &utm, &ll2 );
	312
	313	{
	314	/* find corner coords in lat/lon.
	315	start at whichever is less: top or bottom left lon. goto whichever more: top or bottom right lon
	316	*/
	317	struct LatLon topleft, topright, bottomleft, bottomright;
	318	struct UTM temp_utm;
	319	temp_utm = *center;
	320	temp_utm.easting -= (width/2)*xmpp;
	321	temp_utm.northing += (height/2)*ympp;
	322	a_coords_utm_to_latlon ( &temp_utm, &topleft );
	323	temp_utm.easting += (width*xmpp);
	324	a_coords_utm_to_latlon ( &temp_utm, &topright );
	325	temp_utm.northing -= (height*ympp);
	326	a_coords_utm_to_latlon ( &temp_utm, &bottomright );
	327	temp_utm.easting -= (width*xmpp);
	328	a_coords_utm_to_latlon ( &temp_utm, &bottomleft );
	329	min.lon = (topleft.lon < bottomleft.lon) ? topleft.lon : bottomleft.lon;
	330	max.lon = (topright.lon > bottomright.lon) ? topright.lon : bottomright.lon;
	331	min.lat = (bottomleft.lat < bottomright.lat) ? bottomleft.lat : bottomright.lat;
	332	max.lat = (topleft.lat > topright.lat) ? topleft.lat : topright.lat;
	333	}
	334
	335	lon = ((double) ((long) ((min.lon)/ vcl->deg_inc))) * vcl->deg_inc;
	336	ll.lon = ll2.lon = lon;
	337
	338	for (; ll.lon <= max.lon; ll.lon+=vcl->deg_inc, ll2.lon+=vcl->deg_inc )
	339	{
	340	a_coords_latlon_to_utm ( &ll, &utm );
	341	x1 = ( (utm.easting - center->easting) / xmpp ) + (width / 2);
	342	a_coords_latlon_to_utm ( &ll2, &utm );
	343	x2 = ( (utm.easting - center->easting) / xmpp ) + (width / 2);
	344	vik_viewport_draw_line (vp, vcl->gc, x1, height, x2, 0);
	345	}
	346
	347	utm = *center;
	348	utm.easting = center->easting - ( xmpp * width / 2 );
	349
	350	a_coords_utm_to_latlon ( &utm, &ll );
	351
	352	utm.easting = center->easting + ( xmpp * width / 2 );
	353
	354	a_coords_utm_to_latlon ( &utm, &ll2 );
	355
	356	/* really lat, just reusing a variable */
	357	lon = ((double) ((long) ((min.lat)/ vcl->deg_inc))) * vcl->deg_inc;
	358	ll.lat = ll2.lat = lon;
359
360	for (; ll.lat <= max.lat ; ll.lat+=vcl->deg_inc, ll2.lat+=vcl->deg_inc )
361	{
362	a_coords_latlon_to_utm ( &ll, &utm );
363	x1 = (height / 2) - ( (utm.northing - center->northing) / ympp );
364	a_coords_latlon_to_utm ( &ll2, &utm );
365	x2 = (height / 2) - ( (utm.northing - center->northing) / ympp );
366	vik_viewport_draw_line (vp, vcl->gc, width, x2, 0, x1);
367	}
368	}
369	}
370
371	void vik_coord_layer_free ( VikCoordLayer *vcl )
372	{
373	if ( vcl->gc != NULL )
374	g_object_unref ( G_OBJECT(vcl->gc) );
375
376	if ( vcl->color != NULL )
ac68cea3	377	gdk_color_free ( vcl->color );
50a14534 EB	378	}
	379
	380	static void coord_layer_update_gc ( VikCoordLayer vcl, VikViewport vp, const gchar *color )
	381	{
ac68cea3 MA	382	GdkColor InitColor;
ac68cea3 MA	383
50a14534	384	if ( vcl->color )
ac68cea3	385	gdk_color_free ( vcl->color );
50a14534	386
ac68cea3 MA	387	gdk_color_parse( color, &InitColor);
ac68cea3 MA	388	vcl->color = gdk_color_copy( &InitColor );
50a14534 EB	389
	390	if ( vcl->gc )
	391	g_object_unref ( G_OBJECT(vcl->gc) );
	392
ac68cea3	393	vcl->gc = vik_viewport_new_gc_from_color ( vp, vcl->color, vcl->line_thickness );
50a14534 EB	394	}
	395
	396	VikCoordLayer vik_coord_layer_create ( VikViewport vp )
	397	{
	398	VikCoordLayer *vcl = vik_coord_layer_new ();
	399	coord_layer_update_gc ( vcl, vp, "red" );
	400	return vcl;
	401	}
	402