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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 | * Lat/Lon plotting functions calcxy* are from GPSDrive | |
7 | * GPSDrive Copyright (C) 2001-2004 Fritz Ganter <ganter@ganter.at> | |
8 | * | |
9 | * Multiple UTM zone patch by Kit Transue <notlostyet@didactek.com> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | * | |
25 | */ | |
26 | ||
27 | #define DEFAULT_BACKGROUND_COLOR "#CCCCCC" | |
28 | ||
29 | #include <gtk/gtk.h> | |
30 | #include <math.h> | |
37614d9e | 31 | #include <stdio.h> |
50a14534 EB |
32 | |
33 | #include "coords.h" | |
34 | #include "vikcoord.h" | |
35 | #include "vikviewport.h" | |
36 | ||
37 | #include "mapcoord.h" | |
38 | ||
39 | /* for ALTI_TO_MPP */ | |
40 | #include "globals.h" | |
41 | #include "googlemaps.h" | |
42 | #include "khmaps.h" | |
43 | ||
44 | static gdouble EASTING_OFFSET = 500000.0; | |
45 | ||
46 | static void viewport_class_init ( VikViewportClass *klass ); | |
47 | static void viewport_init ( VikViewport *vvp ); | |
48 | static void viewport_finalize ( GObject *gob ); | |
49 | static void viewport_utm_zone_check ( VikViewport *vvp ); | |
50 | ||
51 | static gboolean calcxy(double *x, double *y, double lg, double lt, double zero_long, double zero_lat, double pixelfact_x, double pixelfact_y, gint mapSizeX2, gint mapSizeY2 ); | |
52 | static gboolean calcxy_rev(double *lg, double *lt, gint x, gint y, double zero_long, double zero_lat, double pixelfact_x, double pixelfact_y, gint mapSizeX2, gint mapSizeY2 ); | |
53 | double calcR (double lat); | |
54 | ||
55 | static double Radius[181]; | |
56 | static void viewport_init_ra(); | |
57 | ||
58 | static GObjectClass *parent_class; | |
59 | ||
60 | static void viewport_google_rezoom ( VikViewport *vvp ); | |
61 | ||
62 | ||
63 | struct _VikViewport { | |
64 | GtkDrawingArea drawing_area; | |
65 | GdkPixmap *scr_buffer; | |
66 | gint width, height; | |
67 | VikCoord center; | |
68 | VikCoordMode coord_mode; | |
69 | gdouble xmpp, ympp; | |
70 | ||
71 | GdkPixbuf *alpha_pixbuf; | |
72 | guint8 alpha_pixbuf_width; | |
73 | guint8 alpha_pixbuf_height; | |
74 | ||
75 | gdouble utm_zone_width; | |
76 | gboolean one_utm_zone; | |
77 | ||
78 | GdkGC *background_gc; | |
79 | GdkColor background_color; | |
35c7c0ba | 80 | gboolean draw_scale; |
50a14534 EB |
81 | |
82 | /* subset of coord types. lat lon can be plotted in 2 ways, google or exp. */ | |
83 | VikViewportDrawMode drawmode; | |
84 | ||
85 | /* handy conversion factors which make google plotting extremely fast */ | |
86 | gdouble google_calcx_fact; | |
87 | gdouble google_calcy_fact; | |
88 | gdouble google_calcx_rev_fact; | |
89 | gdouble google_calcy_rev_fact; | |
90 | }; | |
91 | ||
92 | static gdouble | |
93 | viewport_utm_zone_width ( VikViewport *vvp ) | |
94 | { | |
95 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
96 | struct LatLon ll; | |
97 | ||
98 | /* get latitude of screen bottom */ | |
99 | struct UTM utm = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
100 | utm.northing -= vvp -> height * vvp -> ympp / 2; | |
101 | a_coords_utm_to_latlon ( &utm, &ll ); | |
102 | ||
103 | /* boundary */ | |
104 | ll.lon = (utm.zone - 1) * 6 - 180 ; | |
105 | a_coords_latlon_to_utm ( &ll, &utm); | |
106 | return fabs ( utm.easting - EASTING_OFFSET ) * 2; | |
107 | } else | |
108 | return 0.0; | |
109 | } | |
110 | ||
111 | ||
112 | GType vik_viewport_get_type (void) | |
113 | { | |
114 | static GType vvp_type = 0; | |
115 | ||
116 | if (!vvp_type) | |
117 | { | |
118 | static const GTypeInfo vvp_info = | |
119 | { | |
120 | sizeof (VikViewportClass), | |
121 | NULL, /* base_init */ | |
122 | NULL, /* base_finalize */ | |
123 | (GClassInitFunc) viewport_class_init, | |
124 | NULL, /* class_finalize */ | |
125 | NULL, /* class_data */ | |
126 | sizeof (VikViewport), | |
127 | 0, | |
128 | (GInstanceInitFunc) viewport_init, | |
129 | }; | |
130 | vvp_type = g_type_register_static ( GTK_TYPE_DRAWING_AREA, "VikViewport", &vvp_info, 0 ); | |
131 | } | |
132 | return vvp_type; | |
133 | } | |
134 | ||
135 | static void viewport_class_init ( VikViewportClass *klass ) | |
136 | { | |
137 | /* Destructor */ | |
138 | GObjectClass *object_class; | |
139 | ||
140 | object_class = G_OBJECT_CLASS (klass); | |
141 | ||
142 | object_class->finalize = viewport_finalize; | |
143 | ||
144 | parent_class = g_type_class_peek_parent (klass); | |
145 | } | |
146 | ||
147 | VikViewport *vik_viewport_new () | |
148 | { | |
149 | return VIK_VIEWPORT ( g_object_new ( VIK_VIEWPORT_TYPE, NULL ) ); | |
150 | } | |
151 | ||
152 | static void viewport_init ( VikViewport *vvp ) | |
153 | { | |
154 | viewport_init_ra(); | |
155 | ||
156 | /* TODO: not static */ | |
157 | vvp->xmpp = 4.0; | |
158 | vvp->ympp = 4.0; | |
159 | vvp->coord_mode = VIK_COORD_UTM; | |
160 | vvp->drawmode = VIK_VIEWPORT_DRAWMODE_UTM; | |
161 | vvp->center.north_south = 0; | |
162 | vvp->center.east_west = -166021; | |
163 | vvp->center.utm_zone = 31; | |
164 | vvp->center.utm_letter = 'N'; | |
165 | vvp->scr_buffer = NULL; | |
166 | vvp->alpha_pixbuf = NULL; | |
167 | vvp->alpha_pixbuf_width = vvp->alpha_pixbuf_height = 0; | |
168 | vvp->utm_zone_width = 0.0; | |
169 | vvp->background_gc = NULL; | |
35c7c0ba | 170 | vvp->draw_scale = TRUE; |
50a14534 EB |
171 | g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL); |
172 | } | |
173 | ||
174 | GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp ) | |
175 | { | |
176 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
177 | *rv = vvp->background_color; | |
178 | return rv; | |
179 | } | |
180 | ||
181 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
182 | const gchar *vik_viewport_get_background_color ( VikViewport *vvp ) | |
183 | { | |
184 | static gchar color[8]; | |
185 | g_snprintf(color, sizeof(color), "#%.2x%.2x%.2x", (int)(vvp->background_color.red/256),(int)(vvp->background_color.green/256),(int)(vvp->background_color.blue/256)); | |
186 | return color; | |
187 | } | |
188 | ||
189 | void vik_viewport_set_background_color ( VikViewport *vvp, const gchar *colorname ) | |
190 | { | |
191 | g_assert ( vvp->background_gc ); | |
192 | gdk_color_parse ( colorname, &(vvp->background_color) ); | |
193 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, &(vvp->background_color) ); | |
194 | } | |
195 | ||
196 | void vik_viewport_set_background_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
197 | { | |
198 | g_assert ( vvp->background_gc ); | |
199 | vvp->background_color = *color; | |
200 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, color ); | |
201 | } | |
202 | ||
203 | ||
204 | GdkGC *vik_viewport_new_gc ( VikViewport *vvp, const gchar *colorname, gint thickness ) | |
205 | { | |
206 | GdkGC *rv; | |
207 | GdkColor color; | |
208 | ||
209 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
210 | gdk_color_parse ( colorname, &color ); | |
211 | gdk_gc_set_rgb_fg_color ( rv, &color ); | |
212 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
213 | return rv; | |
214 | } | |
215 | ||
216 | GdkGC *vik_viewport_new_gc_from_color ( VikViewport *vvp, GdkColor *color, gint thickness ) | |
217 | { | |
218 | GdkGC *rv; | |
219 | ||
220 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
221 | gdk_gc_set_rgb_fg_color ( rv, color ); | |
222 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
223 | return rv; | |
224 | } | |
225 | ||
226 | void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint height ) | |
227 | { | |
228 | vvp->width = width; | |
229 | vvp->height = height; | |
230 | if ( vvp->scr_buffer ) | |
231 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
232 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
233 | } | |
234 | ||
235 | ||
236 | GdkPixmap *vik_viewport_get_pixmap ( VikViewport *vvp ) | |
237 | { | |
238 | return vvp->scr_buffer; | |
239 | } | |
240 | ||
241 | gboolean vik_viewport_configure ( VikViewport *vvp ) | |
242 | { | |
243 | g_return_val_if_fail ( vvp != NULL, TRUE ); | |
244 | ||
245 | vvp->width = GTK_WIDGET(vvp)->allocation.width; | |
246 | vvp->height = GTK_WIDGET(vvp)->allocation.height; | |
247 | ||
248 | if ( vvp->scr_buffer ) | |
249 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
250 | ||
251 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
252 | ||
253 | /* this is down here so it can get a GC (necessary?) */ | |
254 | if ( ! vvp->background_gc ) | |
255 | { | |
256 | vvp->background_gc = vik_viewport_new_gc ( vvp, "", 1 ); | |
257 | vik_viewport_set_background_color ( vvp, DEFAULT_BACKGROUND_COLOR ); /* set to "backup" color in vvp->background_color */ | |
258 | } | |
259 | ||
260 | return FALSE; | |
261 | } | |
262 | ||
263 | static void viewport_finalize ( GObject *gob ) | |
264 | { | |
265 | VikViewport *vvp = VIK_VIEWPORT(gob); | |
266 | ||
267 | g_return_if_fail ( vvp != NULL ); | |
268 | ||
269 | if ( vvp->scr_buffer ) | |
270 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
271 | ||
272 | if ( vvp->alpha_pixbuf ) | |
273 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
274 | ||
275 | if ( vvp->background_gc ) | |
276 | g_object_unref ( G_OBJECT ( vvp->background_gc ) ); | |
277 | ||
278 | G_OBJECT_CLASS(parent_class)->finalize(gob); | |
279 | } | |
280 | ||
281 | void vik_viewport_clear ( VikViewport *vvp ) | |
282 | { | |
283 | g_return_if_fail ( vvp != NULL ); | |
284 | gdk_draw_rectangle(GDK_DRAWABLE(vvp->scr_buffer), vvp->background_gc, TRUE, 0, 0, vvp->width, vvp->height); | |
285 | } | |
286 | ||
35c7c0ba EB |
287 | void vik_viewport_set_draw_scale ( VikViewport *vvp, gboolean draw_scale ) |
288 | { | |
289 | vvp->draw_scale = draw_scale; | |
290 | } | |
291 | ||
292 | gboolean vik_viewport_get_draw_scale ( VikViewport *vvp ) | |
293 | { | |
294 | return vvp->draw_scale; | |
295 | } | |
296 | ||
acaf7113 AF |
297 | void vik_viewport_draw_scale ( VikViewport *vvp ) |
298 | { | |
35c7c0ba EB |
299 | if ( vvp->draw_scale ) { |
300 | VikCoord left, right; | |
301 | gdouble unit, base, diff, old_unit, old_diff, ratio; | |
302 | gint odd, len, PAD = 10, SCSIZE = 5, HEIGHT=10; | |
303 | PangoFontDescription *pfd; | |
304 | PangoLayout *pl; | |
305 | gchar s[128]; | |
acaf7113 | 306 | |
35c7c0ba | 307 | g_return_if_fail ( vvp != NULL ); |
acaf7113 | 308 | |
35c7c0ba EB |
309 | vik_viewport_screen_to_coord ( vvp, 0, vvp->height, &left ); |
310 | vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height, &right ); | |
acaf7113 | 311 | |
35c7c0ba EB |
312 | base = vik_coord_diff ( &left, &right ); // in meters |
313 | ratio = (vvp->width/SCSIZE)/base; | |
acaf7113 | 314 | |
35c7c0ba EB |
315 | unit = 1; |
316 | diff = fabs(base-unit); | |
acaf7113 AF |
317 | old_unit = unit; |
318 | old_diff = diff; | |
35c7c0ba EB |
319 | odd = 1; |
320 | while (diff <= old_diff) { | |
321 | old_unit = unit; | |
322 | old_diff = diff; | |
323 | unit = unit * (odd%2 ? 5 : 2); | |
324 | diff = fabs(base-unit); | |
325 | odd++; | |
326 | } | |
327 | unit = old_unit; | |
328 | len = unit * ratio; | |
acaf7113 | 329 | |
35c7c0ba | 330 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 331 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); |
35c7c0ba | 332 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 333 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); |
35c7c0ba | 334 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 335 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); |
35c7c0ba EB |
336 | if (odd%2) { |
337 | int i; | |
338 | for (i=1; i<5; i++) { | |
339 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
acaf7113 | 340 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
35c7c0ba EB |
341 | } |
342 | } else { | |
343 | int i; | |
344 | for (i=1; i<10; i++) { | |
345 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
346 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
347 | } | |
acaf7113 | 348 | } |
35c7c0ba EB |
349 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); |
350 | pfd = pango_font_description_from_string ("Sans 8"); // FIXME: settable option? global variable? | |
351 | pango_layout_set_font_description (pl, pfd); | |
352 | pango_font_description_free (pfd); | |
353 | ||
354 | if (unit >= 1000) { | |
355 | sprintf(s, "%d km", (int)unit/1000); | |
356 | } else { | |
357 | sprintf(s, "%d m", (int)unit); | |
acaf7113 | 358 | } |
35c7c0ba EB |
359 | pango_layout_set_text(pl, s, -1); |
360 | vik_viewport_draw_layout(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
acaf7113 | 361 | PAD + len + PAD, vvp->height - PAD - 10, pl); |
35c7c0ba | 362 | } |
acaf7113 AF |
363 | } |
364 | ||
50a14534 EB |
365 | void vik_viewport_sync ( VikViewport *vvp ) |
366 | { | |
367 | g_return_if_fail ( vvp != NULL ); | |
368 | gdk_draw_drawable(GTK_WIDGET(vvp)->window, GTK_WIDGET(vvp)->style->bg_gc[0], GDK_DRAWABLE(vvp->scr_buffer), 0, 0, 0, 0, vvp->width, vvp->height); | |
369 | } | |
370 | ||
371 | void vik_viewport_pan_sync ( VikViewport *vvp, gint x_off, gint y_off ) | |
372 | { | |
acaf7113 AF |
373 | gint x, y, wid, hei; |
374 | ||
50a14534 EB |
375 | g_return_if_fail ( vvp != NULL ); |
376 | gdk_draw_drawable(GTK_WIDGET(vvp)->window, GTK_WIDGET(vvp)->style->bg_gc[0], GDK_DRAWABLE(vvp->scr_buffer), 0, 0, x_off, y_off, vvp->width, vvp->height); | |
acaf7113 AF |
377 | |
378 | if (x_off >= 0) { | |
379 | x = 0; | |
380 | wid = x_off; | |
381 | } else { | |
382 | x = vvp->width+x_off; | |
383 | wid = -x_off; | |
384 | } | |
385 | if (y_off >= 0) { | |
386 | y = 0; | |
387 | hei = y_off; | |
388 | } else { | |
389 | y = vvp->height+y_off; | |
390 | hei = -y_off; | |
391 | } | |
392 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), x, 0, wid, vvp->height); | |
393 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), 0, y, vvp->width, hei); | |
50a14534 EB |
394 | } |
395 | ||
396 | void vik_viewport_set_zoom ( VikViewport *vvp, gdouble xympp ) | |
397 | { | |
398 | g_return_if_fail ( vvp != NULL ); | |
399 | if ( xympp >= VIK_VIEWPORT_MIN_ZOOM && xympp <= VIK_VIEWPORT_MAX_ZOOM ) | |
400 | vvp->xmpp = vvp->ympp = xympp; | |
401 | ||
402 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
403 | viewport_utm_zone_check(vvp); | |
404 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
405 | viewport_google_rezoom ( vvp ); | |
406 | } | |
407 | ||
408 | /* or could do factor */ | |
409 | void vik_viewport_zoom_in ( VikViewport *vvp ) | |
410 | { | |
411 | g_return_if_fail ( vvp != NULL ); | |
412 | if ( vvp->xmpp >= (VIK_VIEWPORT_MIN_ZOOM*2) && vvp->ympp >= (VIK_VIEWPORT_MIN_ZOOM*2) ) | |
413 | { | |
414 | vvp->xmpp /= 2; | |
415 | vvp->ympp /= 2; | |
416 | ||
417 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
418 | viewport_google_rezoom ( vvp ); | |
419 | ||
420 | viewport_utm_zone_check(vvp); | |
421 | } | |
422 | } | |
423 | ||
424 | void vik_viewport_zoom_out ( VikViewport *vvp ) | |
425 | { | |
426 | g_return_if_fail ( vvp != NULL ); | |
427 | if ( vvp->xmpp <= (VIK_VIEWPORT_MAX_ZOOM/2) && vvp->ympp <= (VIK_VIEWPORT_MAX_ZOOM/2) ) | |
428 | { | |
429 | vvp->xmpp *= 2; | |
430 | vvp->ympp *= 2; | |
431 | ||
432 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
433 | viewport_google_rezoom ( vvp ); | |
434 | ||
435 | viewport_utm_zone_check(vvp); | |
436 | } | |
437 | } | |
438 | ||
439 | gdouble vik_viewport_get_zoom ( VikViewport *vvp ) | |
440 | { | |
441 | if ( vvp->xmpp == vvp->ympp ) | |
442 | return vvp->xmpp; | |
443 | return 0.0; | |
444 | } | |
445 | ||
446 | gdouble vik_viewport_get_xmpp ( VikViewport *vvp ) | |
447 | { | |
448 | return vvp->xmpp; | |
449 | } | |
450 | ||
451 | gdouble vik_viewport_get_ympp ( VikViewport *vvp ) | |
452 | { | |
453 | return vvp->ympp; | |
454 | } | |
455 | ||
456 | void vik_viewport_set_xmpp ( VikViewport *vvp, gdouble xmpp ) | |
457 | { | |
458 | if ( xmpp >= VIK_VIEWPORT_MIN_ZOOM && xmpp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
459 | vvp->xmpp = xmpp; | |
460 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
461 | viewport_utm_zone_check(vvp); | |
462 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
463 | viewport_google_rezoom ( vvp ); | |
464 | } | |
465 | } | |
466 | ||
467 | void vik_viewport_set_ympp ( VikViewport *vvp, gdouble ympp ) | |
468 | { | |
469 | if ( ympp >= VIK_VIEWPORT_MIN_ZOOM && ympp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
470 | vvp->ympp = ympp; | |
471 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
472 | viewport_utm_zone_check(vvp); | |
473 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
474 | viewport_google_rezoom ( vvp ); | |
475 | } | |
476 | } | |
477 | ||
478 | ||
479 | const VikCoord *vik_viewport_get_center ( VikViewport *vvp ) | |
480 | { | |
481 | g_return_val_if_fail ( vvp != NULL, NULL ); | |
482 | return &(vvp->center); | |
483 | } | |
484 | ||
485 | /* called every time we update coordinates/zoom */ | |
486 | static void viewport_utm_zone_check ( VikViewport *vvp ) | |
487 | { | |
488 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
489 | { | |
490 | struct UTM utm; | |
491 | struct LatLon ll; | |
492 | a_coords_utm_to_latlon ( (struct UTM *) &(vvp->center), &ll ); | |
493 | a_coords_latlon_to_utm ( &ll, &utm ); | |
494 | if ( utm.zone != vvp->center.utm_zone ) | |
495 | *((struct UTM *)(&vvp->center)) = utm; | |
496 | ||
497 | /* misc. stuff so we don't have to check later */ | |
498 | vvp->utm_zone_width = viewport_utm_zone_width ( vvp ); | |
499 | vvp->one_utm_zone = ( vik_viewport_rightmost_zone(vvp) == vik_viewport_leftmost_zone(vvp) ); | |
500 | } | |
501 | } | |
502 | ||
503 | void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll ) | |
504 | { | |
505 | vik_coord_load_from_latlon ( &(vvp->center), vvp->coord_mode, ll ); | |
506 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
507 | viewport_utm_zone_check ( vvp ); | |
508 | } | |
509 | ||
510 | void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm ) | |
511 | { | |
512 | vik_coord_load_from_utm ( &(vvp->center), vvp->coord_mode, utm ); | |
513 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
514 | viewport_utm_zone_check ( vvp ); | |
515 | } | |
516 | ||
517 | void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord ) | |
518 | { | |
519 | vvp->center = *coord; | |
520 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
521 | viewport_utm_zone_check ( vvp ); | |
522 | } | |
523 | ||
524 | void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br ) | |
525 | { | |
526 | g_return_if_fail ( vvp->coord_mode == VIK_COORD_UTM ); | |
527 | ||
528 | /* get center, then just offset */ | |
529 | vik_viewport_center_for_zonen ( vvp, VIK_UTM(ul), zone ); | |
530 | ul->mode = VIK_COORD_UTM; | |
531 | *br = *ul; | |
532 | ||
533 | ul->north_south += (vvp->ympp * vvp->height / 2); | |
534 | ul->east_west -= (vvp->xmpp * vvp->width / 2); | |
535 | br->north_south -= (vvp->ympp * vvp->height / 2); | |
536 | br->east_west += (vvp->xmpp * vvp->width / 2); | |
537 | } | |
538 | ||
539 | void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone) | |
540 | { | |
541 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
542 | *center = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
543 | center->easting -= ( zone - center->zone ) * vvp->utm_zone_width; | |
544 | center->zone = zone; | |
545 | } | |
546 | } | |
547 | ||
548 | gchar vik_viewport_leftmost_zone ( VikViewport *vvp ) | |
549 | { | |
550 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
551 | VikCoord coord; | |
552 | g_assert ( vvp != NULL ); | |
553 | vik_viewport_screen_to_coord ( vvp, 0, 0, &coord ); | |
554 | return coord.utm_zone; | |
555 | } | |
556 | return '\0'; | |
557 | } | |
558 | ||
559 | gchar vik_viewport_rightmost_zone ( VikViewport *vvp ) | |
560 | { | |
561 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
562 | VikCoord coord; | |
563 | g_assert ( vvp != NULL ); | |
564 | vik_viewport_screen_to_coord ( vvp, vvp->width, 0, &coord ); | |
565 | return coord.utm_zone; | |
566 | } | |
567 | return '\0'; | |
568 | } | |
569 | ||
570 | ||
571 | void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y ) | |
572 | { | |
573 | g_return_if_fail ( vvp != NULL ); | |
574 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
575 | /* slightly optimized */ | |
576 | vvp->center.east_west += vvp->xmpp * (x - (vvp->width/2)); | |
577 | vvp->center.north_south += vvp->ympp * ((vvp->height/2) - y); | |
578 | viewport_utm_zone_check ( vvp ); | |
579 | } else { | |
580 | VikCoord tmp; | |
581 | vik_viewport_screen_to_coord ( vvp, x, y, &tmp ); | |
582 | vik_viewport_set_center_coord ( vvp, &tmp ); | |
583 | } | |
584 | } | |
585 | ||
586 | gint vik_viewport_get_width( VikViewport *vvp ) | |
587 | { | |
588 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
589 | return vvp->width; | |
590 | } | |
591 | ||
592 | gint vik_viewport_get_height( VikViewport *vvp ) | |
593 | { | |
594 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
595 | return vvp->height; | |
596 | } | |
597 | ||
598 | void vik_viewport_screen_to_coord ( VikViewport *vvp, int x, int y, VikCoord *coord ) | |
599 | { | |
600 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
601 | int zone_delta; | |
602 | struct UTM *utm = (struct UTM *) coord; | |
603 | coord->mode = VIK_COORD_UTM; | |
604 | ||
605 | g_return_if_fail ( vvp != NULL ); | |
606 | ||
607 | utm->zone = vvp->center.utm_zone; | |
608 | utm->letter = vvp->center.utm_letter; | |
609 | utm->easting = ( ( x - ( vvp->width / 2) ) * vvp->xmpp ) + vvp->center.east_west; | |
610 | zone_delta = floor( (utm->easting - EASTING_OFFSET ) / vvp->utm_zone_width + 0.5 ); | |
611 | utm->zone += zone_delta; | |
612 | utm->easting -= zone_delta * vvp->utm_zone_width; | |
613 | utm->northing = ( ( ( vvp->height / 2) - y ) * vvp->ympp ) + vvp->center.north_south; | |
614 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
615 | coord->mode = VIK_COORD_LATLON; | |
616 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) | |
617 | calcxy_rev(&(coord->east_west), &(coord->north_south), x, y, vvp->center.east_west, vvp->center.north_south, vvp->xmpp * ALTI_TO_MPP, vvp->ympp * ALTI_TO_MPP, vvp->width/2, vvp->height/2); | |
618 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) { | |
619 | /* google */ | |
620 | coord->east_west = (x - (vvp->width/2)) * vvp->google_calcx_rev_fact + vvp->center.east_west; | |
621 | coord->north_south = ((vvp->height/2) - y) * vvp->google_calcy_rev_fact + vvp->center.north_south; | |
622 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_KH ) { | |
623 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
624 | coord->north_south = vvp->center.north_south + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)); | |
625 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { | |
626 | /* FIXMERCATOR */ | |
627 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
628 | coord->north_south = DEMERCLAT ( MERCLAT(vvp->center.north_south) + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) ); | |
629 | ||
630 | #if 0 | |
631 | --> THIS IS JUNK HERE. | |
632 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
633 | ||
634 | (*y - vvp->height/2) / 256 / 65536 * 180 * vvp->ympp = (MERCLAT(center->lat) - MERCLAT(ll->lat); | |
635 | DML((180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) + ML(cl)) = ll | |
636 | #endif | |
637 | } | |
638 | } | |
639 | } | |
640 | ||
641 | void vik_viewport_coord_to_screen ( VikViewport *vvp, const VikCoord *coord, int *x, int *y ) | |
642 | { | |
643 | static VikCoord tmp; | |
644 | g_return_if_fail ( vvp != NULL ); | |
645 | ||
646 | if ( coord->mode != vvp->coord_mode ) | |
647 | { | |
648 | g_warning ( "Have to convert in vik_viewport_coord_to_screen! This should never happen!"); | |
649 | vik_coord_copy_convert ( coord, vvp->coord_mode, &tmp ); | |
650 | coord = &tmp; | |
651 | } | |
652 | ||
653 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
654 | struct UTM *center = (struct UTM *) &(vvp->center); | |
655 | struct UTM *utm = (struct UTM *) coord; | |
656 | if ( center->zone != utm->zone && vvp->one_utm_zone ) | |
657 | { | |
658 | *x = *y = VIK_VIEWPORT_UTM_WRONG_ZONE; | |
659 | return; | |
660 | } | |
661 | ||
662 | *x = ( (utm->easting - center->easting) / vvp->xmpp ) + (vvp->width / 2) - | |
663 | (center->zone - utm->zone ) * vvp->utm_zone_width / vvp->xmpp; | |
664 | *y = (vvp->height / 2) - ( (utm->northing - center->northing) / vvp->ympp ); | |
665 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
666 | struct LatLon *center = (struct LatLon *) &(vvp->center); | |
667 | struct LatLon *ll = (struct LatLon *) coord; | |
668 | double xx,yy; | |
669 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) { | |
670 | calcxy ( &xx, &yy, center->lon, center->lat, ll->lon, ll->lat, vvp->xmpp * ALTI_TO_MPP, vvp->ympp * ALTI_TO_MPP, vvp->width / 2, vvp->height / 2 ); | |
671 | *x = xx; *y = yy; | |
672 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) { | |
673 | /* google */ | |
674 | *x = vvp->google_calcx_fact * (ll->lon - center->lon) + (vvp->width/2); | |
675 | *y = vvp->google_calcy_fact * (center->lat - ll->lat) + (vvp->height/2); | |
676 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_KH ) { | |
677 | /* subtract, convert to KH coords; blow it up by 256 */ | |
678 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
679 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (center->lat - ll->lat))*256.0; | |
680 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { | |
681 | /* FIXMERCATOR: Optimize */ | |
682 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
683 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
684 | } | |
685 | } | |
686 | } | |
687 | ||
d9ffd267 EB |
688 | void a_viewport_clip_line ( gint *x1, gint *y1, gint *x2, gint *y2 ) |
689 | { | |
690 | if ( *x1 > 20000 || *x1 < -20000 ) { | |
691 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
692 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
693 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
694 | } else if ( *y1 > 20000 || *y1 < -20000 ) { | |
695 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
696 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
697 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
698 | } else if ( *x2 > 20000 || *x2 < -20000 ) { | |
699 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
700 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
701 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
37614d9e | 702 | g_print("%f, %d, %d\n", shrinkfactor, *x2, *y2); |
d9ffd267 EB |
703 | } else if ( *y2 > 20000 || *y2 < -20000 ) { |
704 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
705 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
706 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
707 | } | |
708 | } | |
709 | ||
50a14534 EB |
710 | void vik_viewport_draw_line ( VikViewport *vvp, GdkGC *gc, gint x1, gint y1, gint x2, gint y2 ) |
711 | { | |
712 | if ( ! ( ( x1 < 0 && x2 < 0 ) || ( y1 < 0 && y2 < 0 ) || | |
d9ffd267 EB |
713 | ( x1 > vvp->width && x2 > vvp->width ) || ( y1 > vvp->height && y2 > vvp->height ) ) ) { |
714 | /*** clipping, yeah! ***/ | |
715 | a_viewport_clip_line ( &x1, &y1, &x2, &y2 ); | |
716 | gdk_draw_line ( vvp->scr_buffer, gc, x1, y1, x2, y2); | |
717 | } | |
50a14534 EB |
718 | } |
719 | ||
720 | void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 ) | |
721 | { | |
722 | if ( x1 > -10 && x1 < vvp->width + 10 && y1 > -10 && y1 < vvp->height + 10 ) | |
723 | gdk_draw_rectangle ( vvp->scr_buffer, gc, filled, x1, y1, x2, y2); | |
724 | } | |
725 | ||
726 | void vik_viewport_draw_string ( VikViewport *vvp, GdkFont *font, GdkGC *gc, gint x1, gint y1, const gchar *string ) | |
727 | { | |
728 | if ( x1 > -100 && x1 < vvp->width + 100 && y1 > -100 && y1 < vvp->height + 100 ) | |
729 | gdk_draw_string ( vvp->scr_buffer, font, gc, x1, y1, string ); | |
730 | } | |
731 | ||
732 | /* shouldn't use this -- slow -- change the alpha channel instead. */ | |
733 | void vik_viewport_draw_pixbuf_with_alpha ( VikViewport *vvp, GdkPixbuf *pixbuf, gint alpha, | |
734 | gint src_x, gint src_y, gint dest_x, gint dest_y, gint w, gint h ) | |
735 | { | |
736 | gint real_dest_x = MAX(dest_x,0); | |
737 | gint real_dest_y = MAX(dest_y,0); | |
738 | ||
739 | if ( alpha == 0 ) | |
740 | return; /* don't waste your time */ | |
741 | ||
742 | if ( w > vvp->alpha_pixbuf_width || h > vvp->alpha_pixbuf_height ) | |
743 | { | |
744 | if ( vvp->alpha_pixbuf ) | |
745 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
746 | vvp->alpha_pixbuf_width = MAX(w,vvp->alpha_pixbuf_width); | |
747 | vvp->alpha_pixbuf_height = MAX(h,vvp->alpha_pixbuf_height); | |
748 | vvp->alpha_pixbuf = gdk_pixbuf_new ( GDK_COLORSPACE_RGB, FALSE, 8, vvp->alpha_pixbuf_width, vvp->alpha_pixbuf_height ); | |
749 | } | |
750 | ||
751 | w = MIN(w,vvp->width - dest_x); | |
752 | h = MIN(h,vvp->height - dest_y); | |
753 | ||
754 | /* check that we are drawing within boundaries. */ | |
755 | src_x += (real_dest_x - dest_x); | |
756 | src_y += (real_dest_y - dest_y); | |
757 | w -= (real_dest_x - dest_x); | |
758 | h -= (real_dest_y - dest_y); | |
759 | ||
760 | gdk_pixbuf_get_from_drawable ( vvp->alpha_pixbuf, vvp->scr_buffer, NULL, | |
761 | real_dest_x, real_dest_y, 0, 0, w, h ); | |
762 | ||
763 | /* do a composite */ | |
764 | gdk_pixbuf_composite ( pixbuf, vvp->alpha_pixbuf, 0, 0, w, h, -src_x, -src_y, 1, 1, 0, alpha ); | |
765 | ||
766 | /* draw pixbuf_tmp */ | |
767 | vik_viewport_draw_pixbuf ( vvp, vvp->alpha_pixbuf, 0, 0, real_dest_x, real_dest_y, w, h ); | |
768 | } | |
769 | ||
770 | void vik_viewport_draw_pixbuf ( VikViewport *vvp, GdkPixbuf *pixbuf, gint src_x, gint src_y, | |
771 | gint dest_x, gint dest_y, gint w, gint h ) | |
772 | { | |
773 | gdk_draw_pixbuf ( vvp->scr_buffer, | |
774 | // GTK_WIDGET(vvp)->style->black_gc, | |
775 | NULL, | |
776 | pixbuf, | |
777 | src_x, src_y, dest_x, dest_y, w, h, | |
778 | GDK_RGB_DITHER_NONE, 0, 0 ); | |
779 | } | |
780 | ||
781 | void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2 ) | |
782 | { | |
783 | gdk_draw_arc ( vvp->scr_buffer, gc, filled, x, y, width, height, angle1, angle2 ); | |
784 | } | |
785 | ||
786 | ||
787 | void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints ) | |
788 | { | |
789 | gdk_draw_polygon ( vvp->scr_buffer, gc, filled, points, npoints ); | |
790 | } | |
791 | ||
792 | VikCoordMode vik_viewport_get_coord_mode ( const VikViewport *vvp ) | |
793 | { | |
794 | g_assert ( vvp ); | |
795 | return vvp->coord_mode; | |
796 | } | |
797 | ||
798 | static void viewport_set_coord_mode ( VikViewport *vvp, VikCoordMode mode ) | |
799 | { | |
800 | g_return_if_fail ( vvp != NULL ); | |
801 | vvp->coord_mode = mode; | |
802 | vik_coord_convert ( &(vvp->center), mode ); | |
803 | } | |
804 | ||
805 | /* Thanks GPSDrive */ | |
806 | static gboolean calcxy_rev(double *lg, double *lt, gint x, gint y, double zero_long, double zero_lat, double pixelfact_x, double pixelfact_y, gint mapSizeX2, gint mapSizeY2 ) | |
807 | { | |
808 | int px, py; | |
809 | gdouble dif, lat, lon; | |
810 | double Ra = Radius[90+(gint)zero_lat]; | |
811 | ||
812 | px = (mapSizeX2 - x) * pixelfact_x; | |
813 | py = (-mapSizeY2 + y) * pixelfact_y; | |
814 | ||
815 | lat = zero_lat - py / Ra; | |
816 | lat = zero_lat - py / Ra; | |
817 | lon = | |
818 | zero_long - | |
819 | px / (Ra * | |
820 | cos (lat * DEG2RAD)); | |
821 | ||
822 | dif = lat * (1 - (cos ((fabs (lon - zero_long)) * DEG2RAD))); | |
823 | lat = lat - dif / 1.5; | |
824 | lon = | |
825 | zero_long - | |
826 | px / (Ra * | |
827 | cos (lat * DEG2RAD)); | |
828 | ||
829 | *lt = lat; | |
830 | *lg = lon; | |
831 | return (TRUE); | |
832 | } | |
833 | ||
834 | /* Thanks GPSDrive */ | |
835 | static gboolean calcxy(double *x, double *y, double lg, double lt, double zero_long, double zero_lat, double pixelfact_x, double pixelfact_y, gint mapSizeX2, gint mapSizeY2 ) | |
836 | { | |
837 | double dif; | |
838 | double Ra; | |
839 | gint mapSizeX = 2 * mapSizeX2; | |
840 | gint mapSizeY = 2 * mapSizeY2; | |
841 | ||
842 | g_assert ( lt >= -90.0 && lt <= 90.0 ); | |
843 | // lg *= rad2deg; // FIXME, optimize equations | |
844 | // lt *= rad2deg; | |
845 | Ra = Radius[90+(gint)lt]; | |
846 | *x = Ra * | |
847 | cos (lt*DEG2RAD) * (lg - zero_long); | |
848 | *y = Ra * (lt - zero_lat); | |
849 | dif = Ra * RAD2DEG * (1 - (cos ((DEG2RAD * (lg - zero_long))))); | |
850 | *y = *y + dif / 1.85; | |
851 | *x = *x / pixelfact_x; | |
852 | *y = *y / pixelfact_y; | |
853 | *x = mapSizeX2 - *x; | |
854 | *y += mapSizeY2; | |
855 | if ((*x < 0)||(*x >= mapSizeX)||(*y < 0)||(*y >= mapSizeY)) | |
856 | return (FALSE); | |
857 | return (TRUE); | |
858 | } | |
859 | ||
860 | static void viewport_init_ra() | |
861 | { | |
862 | static gboolean done_before = FALSE; | |
863 | if ( !done_before ) | |
864 | { | |
865 | gint i; | |
866 | for ( i = -90; i <= 90; i++) | |
867 | Radius[i+90] = calcR ( (double)i ) * DEG2RAD; | |
868 | done_before = TRUE; | |
869 | } | |
870 | } | |
871 | ||
872 | double calcR (double lat) | |
873 | { | |
874 | double a = 6378.137, r, sc, x, y, z; | |
875 | double e2 = 0.081082 * 0.081082; | |
876 | /* | |
877 | * the radius of curvature of an ellipsoidal Earth in the plane of the | |
878 | * meridian is given by | |
879 | * | |
880 | * R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2) | |
881 | * | |
882 | * | |
883 | * where a is the equatorial radius, b is the polar radius, and e is | |
884 | * the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2) | |
885 | * | |
886 | * a = 6378 km (3963 mi) Equatorial radius (surface to center distance) | |
887 | * b = 6356.752 km (3950 mi) Polar radius (surface to center distance) e | |
888 | * = 0.081082 Eccentricity | |
889 | */ | |
890 | ||
891 | lat = lat * DEG2RAD; | |
892 | sc = sin (lat); | |
893 | x = a * (1.0 - e2); | |
894 | z = 1.0 - e2 * sc * sc; | |
895 | y = pow (z, 1.5); | |
896 | r = x / y; | |
897 | r = r * 1000.0; | |
898 | return r; | |
899 | } | |
900 | ||
901 | gboolean vik_viewport_is_one_zone ( VikViewport *vvp ) | |
902 | { | |
903 | return vvp->coord_mode == VIK_COORD_UTM && vvp->one_utm_zone; | |
904 | } | |
905 | ||
906 | void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout ) | |
907 | { | |
908 | if ( x > -100 && x < vvp->width + 100 && y > -100 && y < vvp->height + 100 ) | |
909 | gdk_draw_layout ( vvp->scr_buffer, gc, x, y, layout ); | |
910 | } | |
911 | ||
912 | void vik_gc_get_fg_color ( GdkGC *gc, GdkColor *dest ) | |
913 | { | |
914 | static GdkGCValues values; | |
915 | gdk_gc_get_values ( gc, &values ); | |
916 | gdk_colormap_query_color ( gdk_colormap_get_system(), values.foreground.pixel, dest ); | |
917 | } | |
918 | ||
919 | GdkFunction vik_gc_get_function ( GdkGC *gc ) | |
920 | { | |
921 | static GdkGCValues values; | |
922 | gdk_gc_get_values ( gc, &values ); | |
923 | return values.function; | |
924 | } | |
925 | ||
926 | void vik_viewport_set_drawmode ( VikViewport *vvp, VikViewportDrawMode drawmode ) | |
927 | { | |
928 | vvp->drawmode = drawmode; | |
929 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
930 | viewport_set_coord_mode ( vvp, VIK_COORD_UTM ); | |
931 | else { | |
932 | viewport_set_coord_mode ( vvp, VIK_COORD_LATLON ); | |
933 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
934 | viewport_google_rezoom ( vvp ); | |
935 | } | |
936 | } | |
937 | ||
938 | VikViewportDrawMode vik_viewport_get_drawmode ( VikViewport *vvp ) | |
939 | { | |
940 | return vvp->drawmode; | |
941 | } | |
942 | ||
943 | static void viewport_google_rezoom ( VikViewport *vvp ) | |
944 | { | |
945 | vvp->google_calcx_fact = (GOOGLEMAPS_ZOOM_ONE_MPP * 65536.0 * 0.7716245833877 / vvp->xmpp); | |
946 | vvp->google_calcy_fact = (GOOGLEMAPS_ZOOM_ONE_MPP * 65536.0 / vvp->ympp); | |
947 | vvp->google_calcx_rev_fact = 1 / vvp->google_calcx_fact; | |
948 | vvp->google_calcy_rev_fact = 1 / vvp->google_calcy_fact; | |
949 | } |