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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> | |
31 | ||
32 | #include "coords.h" | |
33 | #include "vikcoord.h" | |
34 | #include "vikwindow.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; | |
80 | GdkGC *scale_bg_gc; | |
81 | gboolean draw_scale; | |
82 | gboolean draw_centermark; | |
83 | ||
84 | /* subset of coord types. lat lon can be plotted in 2 ways, google or exp. */ | |
85 | VikViewportDrawMode drawmode; | |
86 | ||
87 | /* handy conversion factors which make google plotting extremely fast */ | |
88 | gdouble google_calcx_fact; | |
89 | gdouble google_calcy_fact; | |
90 | gdouble google_calcx_rev_fact; | |
91 | gdouble google_calcy_rev_fact; | |
92 | ||
93 | /* trigger stuff */ | |
94 | gpointer trigger; | |
95 | GdkPixmap *snapshot_buffer; | |
96 | gboolean half_drawn; | |
97 | }; | |
98 | ||
99 | static gdouble | |
100 | viewport_utm_zone_width ( VikViewport *vvp ) | |
101 | { | |
102 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
103 | struct LatLon ll; | |
104 | ||
105 | /* get latitude of screen bottom */ | |
106 | struct UTM utm = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
107 | utm.northing -= vvp -> height * vvp -> ympp / 2; | |
108 | a_coords_utm_to_latlon ( &utm, &ll ); | |
109 | ||
110 | /* boundary */ | |
111 | ll.lon = (utm.zone - 1) * 6 - 180 ; | |
112 | a_coords_latlon_to_utm ( &ll, &utm); | |
113 | return fabs ( utm.easting - EASTING_OFFSET ) * 2; | |
114 | } else | |
115 | return 0.0; | |
116 | } | |
117 | ||
118 | ||
119 | GType vik_viewport_get_type (void) | |
120 | { | |
121 | static GType vvp_type = 0; | |
122 | ||
123 | if (!vvp_type) | |
124 | { | |
125 | static const GTypeInfo vvp_info = | |
126 | { | |
127 | sizeof (VikViewportClass), | |
128 | NULL, /* base_init */ | |
129 | NULL, /* base_finalize */ | |
130 | (GClassInitFunc) viewport_class_init, | |
131 | NULL, /* class_finalize */ | |
132 | NULL, /* class_data */ | |
133 | sizeof (VikViewport), | |
134 | 0, | |
135 | (GInstanceInitFunc) viewport_init, | |
136 | }; | |
137 | vvp_type = g_type_register_static ( GTK_TYPE_DRAWING_AREA, "VikViewport", &vvp_info, 0 ); | |
138 | } | |
139 | return vvp_type; | |
140 | } | |
141 | ||
142 | static void viewport_class_init ( VikViewportClass *klass ) | |
143 | { | |
144 | /* Destructor */ | |
145 | GObjectClass *object_class; | |
146 | ||
147 | object_class = G_OBJECT_CLASS (klass); | |
148 | ||
149 | object_class->finalize = viewport_finalize; | |
150 | ||
151 | parent_class = g_type_class_peek_parent (klass); | |
152 | } | |
153 | ||
154 | VikViewport *vik_viewport_new () | |
155 | { | |
156 | VikViewport *vv = VIK_VIEWPORT ( g_object_new ( VIK_VIEWPORT_TYPE, NULL ) ); | |
157 | return vv; | |
158 | } | |
159 | ||
160 | static void viewport_init ( VikViewport *vvp ) | |
161 | { | |
162 | viewport_init_ra(); | |
163 | ||
164 | /* TODO: not static */ | |
165 | vvp->xmpp = 4.0; | |
166 | vvp->ympp = 4.0; | |
167 | vvp->coord_mode = VIK_COORD_LATLON; | |
168 | vvp->drawmode = VIK_VIEWPORT_DRAWMODE_MERCATOR; | |
169 | vvp->center.mode = VIK_COORD_LATLON; | |
170 | vvp->center.north_south = 40.714490; | |
171 | vvp->center.east_west = -74.007130; | |
172 | vvp->center.utm_zone = 31; | |
173 | vvp->center.utm_letter = 'N'; | |
174 | vvp->scr_buffer = NULL; | |
175 | vvp->alpha_pixbuf = NULL; | |
176 | vvp->alpha_pixbuf_width = vvp->alpha_pixbuf_height = 0; | |
177 | vvp->utm_zone_width = 0.0; | |
178 | vvp->background_gc = NULL; | |
179 | vvp->scale_bg_gc = NULL; | |
180 | vvp->draw_scale = TRUE; | |
181 | vvp->draw_centermark = TRUE; | |
182 | ||
183 | vvp->trigger = NULL; | |
184 | vvp->snapshot_buffer = NULL; | |
185 | vvp->half_drawn = FALSE; | |
186 | ||
187 | g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL); | |
188 | ||
189 | GTK_WIDGET_SET_FLAGS(vvp, GTK_CAN_FOCUS); /* allow VVP to have focus -- enabling key events, etc */ | |
190 | } | |
191 | ||
192 | GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp ) | |
193 | { | |
194 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
195 | *rv = vvp->background_color; | |
196 | return rv; | |
197 | } | |
198 | ||
199 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
200 | const gchar *vik_viewport_get_background_color ( VikViewport *vvp ) | |
201 | { | |
202 | static gchar color[8]; | |
203 | 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)); | |
204 | return color; | |
205 | } | |
206 | ||
207 | void vik_viewport_set_background_color ( VikViewport *vvp, const gchar *colorname ) | |
208 | { | |
209 | g_assert ( vvp->background_gc ); | |
210 | gdk_color_parse ( colorname, &(vvp->background_color) ); | |
211 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, &(vvp->background_color) ); | |
212 | } | |
213 | ||
214 | void vik_viewport_set_background_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
215 | { | |
216 | g_assert ( vvp->background_gc ); | |
217 | vvp->background_color = *color; | |
218 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, color ); | |
219 | } | |
220 | ||
221 | ||
222 | GdkGC *vik_viewport_new_gc ( VikViewport *vvp, const gchar *colorname, gint thickness ) | |
223 | { | |
224 | GdkGC *rv; | |
225 | GdkColor color; | |
226 | ||
227 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
228 | gdk_color_parse ( colorname, &color ); | |
229 | gdk_gc_set_rgb_fg_color ( rv, &color ); | |
230 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
231 | return rv; | |
232 | } | |
233 | ||
234 | GdkGC *vik_viewport_new_gc_from_color ( VikViewport *vvp, GdkColor *color, gint thickness ) | |
235 | { | |
236 | GdkGC *rv; | |
237 | ||
238 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
239 | gdk_gc_set_rgb_fg_color ( rv, color ); | |
240 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
241 | return rv; | |
242 | } | |
243 | ||
244 | void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint height ) | |
245 | { | |
246 | vvp->width = width; | |
247 | vvp->height = height; | |
248 | if ( vvp->scr_buffer ) | |
249 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
250 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
251 | ||
252 | /* TODO trigger: only if this is enabled !!! */ | |
253 | if ( vvp->snapshot_buffer ) | |
254 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
255 | vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
256 | } | |
257 | ||
258 | ||
259 | GdkPixmap *vik_viewport_get_pixmap ( VikViewport *vvp ) | |
260 | { | |
261 | return vvp->scr_buffer; | |
262 | } | |
263 | ||
264 | gboolean vik_viewport_configure ( VikViewport *vvp ) | |
265 | { | |
266 | g_return_val_if_fail ( vvp != NULL, TRUE ); | |
267 | ||
268 | vvp->width = GTK_WIDGET(vvp)->allocation.width; | |
269 | vvp->height = GTK_WIDGET(vvp)->allocation.height; | |
270 | ||
271 | if ( vvp->scr_buffer ) | |
272 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
273 | ||
274 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
275 | ||
276 | /* TODO trigger: only if enabled! */ | |
277 | if ( vvp->snapshot_buffer ) | |
278 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
279 | ||
280 | vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
281 | /* TODO trigger */ | |
282 | ||
283 | /* this is down here so it can get a GC (necessary?) */ | |
284 | if ( ! vvp->background_gc ) | |
285 | { | |
286 | vvp->background_gc = vik_viewport_new_gc ( vvp, "", 1 ); | |
287 | vik_viewport_set_background_color ( vvp, DEFAULT_BACKGROUND_COLOR ); /* set to "backup" color in vvp->background_color */ | |
288 | } | |
289 | if ( !vvp->scale_bg_gc) { | |
290 | vvp->scale_bg_gc = vik_viewport_new_gc(vvp, "grey", 3); | |
291 | } | |
292 | ||
293 | return FALSE; | |
294 | } | |
295 | ||
296 | static void viewport_finalize ( GObject *gob ) | |
297 | { | |
298 | VikViewport *vvp = VIK_VIEWPORT(gob); | |
299 | ||
300 | g_return_if_fail ( vvp != NULL ); | |
301 | ||
302 | if ( vvp->scr_buffer ) | |
303 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
304 | ||
305 | if ( vvp->snapshot_buffer ) | |
306 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
307 | ||
308 | if ( vvp->alpha_pixbuf ) | |
309 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
310 | ||
311 | if ( vvp->background_gc ) | |
312 | g_object_unref ( G_OBJECT ( vvp->background_gc ) ); | |
313 | ||
314 | if ( vvp->scale_bg_gc ) { | |
315 | g_object_unref ( G_OBJECT ( vvp->scale_bg_gc ) ); | |
316 | vvp->scale_bg_gc = NULL; | |
317 | } | |
318 | ||
319 | G_OBJECT_CLASS(parent_class)->finalize(gob); | |
320 | } | |
321 | ||
322 | void vik_viewport_clear ( VikViewport *vvp ) | |
323 | { | |
324 | g_return_if_fail ( vvp != NULL ); | |
325 | gdk_draw_rectangle(GDK_DRAWABLE(vvp->scr_buffer), vvp->background_gc, TRUE, 0, 0, vvp->width, vvp->height); | |
326 | } | |
327 | ||
328 | void vik_viewport_set_draw_scale ( VikViewport *vvp, gboolean draw_scale ) | |
329 | { | |
330 | vvp->draw_scale = draw_scale; | |
331 | } | |
332 | ||
333 | gboolean vik_viewport_get_draw_scale ( VikViewport *vvp ) | |
334 | { | |
335 | return vvp->draw_scale; | |
336 | } | |
337 | ||
338 | void vik_viewport_draw_scale ( VikViewport *vvp ) | |
339 | { | |
340 | if ( vvp->draw_scale ) { | |
341 | VikCoord left, right; | |
342 | gdouble unit, base, diff, old_unit, old_diff, ratio; | |
343 | gint odd, len, PAD = 10, SCSIZE = 5, HEIGHT=10; | |
344 | PangoFontDescription *pfd; | |
345 | PangoLayout *pl; | |
346 | gchar s[128]; | |
347 | ||
348 | g_return_if_fail ( vvp != NULL ); | |
349 | ||
350 | vik_viewport_screen_to_coord ( vvp, 0, vvp->height, &left ); | |
351 | vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height, &right ); | |
352 | ||
353 | base = vik_coord_diff ( &left, &right ); // in meters | |
354 | ratio = (vvp->width/SCSIZE)/base; | |
355 | ||
356 | unit = 1; | |
357 | diff = fabs(base-unit); | |
358 | old_unit = unit; | |
359 | old_diff = diff; | |
360 | odd = 1; | |
361 | while (diff <= old_diff) { | |
362 | old_unit = unit; | |
363 | old_diff = diff; | |
364 | unit = unit * (odd%2 ? 5 : 2); | |
365 | diff = fabs(base-unit); | |
366 | odd++; | |
367 | } | |
368 | unit = old_unit; | |
369 | len = unit * ratio; | |
370 | ||
371 | /* white background */ | |
372 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
373 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); | |
374 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
375 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); | |
376 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
377 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); | |
378 | /* black scale */ | |
379 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
380 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); | |
381 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
382 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); | |
383 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
384 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); | |
385 | if (odd%2) { | |
386 | int i; | |
387 | for (i=1; i<5; i++) { | |
388 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
389 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
390 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
391 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
392 | } | |
393 | } else { | |
394 | int i; | |
395 | for (i=1; i<10; i++) { | |
396 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
397 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
398 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
399 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
400 | } | |
401 | } | |
402 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); | |
403 | pfd = pango_font_description_from_string ("Sans 8"); // FIXME: settable option? global variable? | |
404 | pango_layout_set_font_description (pl, pfd); | |
405 | pango_font_description_free (pfd); | |
406 | ||
407 | if (unit >= 1000) { | |
408 | sprintf(s, "%d km", (int)unit/1000); | |
409 | } else { | |
410 | sprintf(s, "%d m", (int)unit); | |
411 | } | |
412 | pango_layout_set_text(pl, s, -1); | |
413 | vik_viewport_draw_layout(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
414 | PAD + len + PAD, vvp->height - PAD - 10, pl); | |
415 | } | |
416 | } | |
417 | ||
418 | void vik_viewport_set_draw_centermark ( VikViewport *vvp, gboolean draw_centermark ) | |
419 | { | |
420 | vvp->draw_centermark = draw_centermark; | |
421 | } | |
422 | ||
423 | gboolean vik_viewport_get_draw_centermark ( VikViewport *vvp ) | |
424 | { | |
425 | return vvp->draw_centermark; | |
426 | } | |
427 | ||
428 | void vik_viewport_draw_centermark ( VikViewport *vvp ) | |
429 | { | |
430 | if ( !vvp->draw_centermark ) | |
431 | return; | |
432 | ||
433 | const int len = 30; | |
434 | const int gap = 4; | |
435 | int center_x = vvp->width/2; | |
436 | int center_y = vvp->height/2; | |
437 | GdkGC * black_gc = GTK_WIDGET(&vvp->drawing_area)->style->black_gc; | |
438 | ||
439 | /* white back ground */ | |
440 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x - len, center_y, center_x - gap, center_y); | |
441 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x + gap, center_y, center_x + len, center_y); | |
442 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y - len, center_x, center_y - gap); | |
443 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y + gap, center_x, center_y + len); | |
444 | /* black fore ground */ | |
445 | vik_viewport_draw_line(vvp, black_gc, center_x - len, center_y, center_x - gap, center_y); | |
446 | vik_viewport_draw_line(vvp, black_gc, center_x + gap, center_y, center_x + len, center_y); | |
447 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y - len, center_x, center_y - gap); | |
448 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y + gap, center_x, center_y + len); | |
449 | ||
450 | } | |
451 | ||
452 | void vik_viewport_sync ( VikViewport *vvp ) | |
453 | { | |
454 | g_return_if_fail ( vvp != NULL ); | |
455 | 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); | |
456 | } | |
457 | ||
458 | void vik_viewport_pan_sync ( VikViewport *vvp, gint x_off, gint y_off ) | |
459 | { | |
460 | gint x, y, wid, hei; | |
461 | ||
462 | g_return_if_fail ( vvp != NULL ); | |
463 | 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); | |
464 | ||
465 | if (x_off >= 0) { | |
466 | x = 0; | |
467 | wid = x_off; | |
468 | } else { | |
469 | x = vvp->width+x_off; | |
470 | wid = -x_off; | |
471 | } | |
472 | if (y_off >= 0) { | |
473 | y = 0; | |
474 | hei = y_off; | |
475 | } else { | |
476 | y = vvp->height+y_off; | |
477 | hei = -y_off; | |
478 | } | |
479 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), x, 0, wid, vvp->height); | |
480 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), 0, y, vvp->width, hei); | |
481 | } | |
482 | ||
483 | void vik_viewport_set_zoom ( VikViewport *vvp, gdouble xympp ) | |
484 | { | |
485 | g_return_if_fail ( vvp != NULL ); | |
486 | if ( xympp >= VIK_VIEWPORT_MIN_ZOOM && xympp <= VIK_VIEWPORT_MAX_ZOOM ) | |
487 | vvp->xmpp = vvp->ympp = xympp; | |
488 | ||
489 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
490 | viewport_utm_zone_check(vvp); | |
491 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
492 | viewport_google_rezoom ( vvp ); | |
493 | } | |
494 | ||
495 | /* or could do factor */ | |
496 | void vik_viewport_zoom_in ( VikViewport *vvp ) | |
497 | { | |
498 | g_return_if_fail ( vvp != NULL ); | |
499 | if ( vvp->xmpp >= (VIK_VIEWPORT_MIN_ZOOM*2) && vvp->ympp >= (VIK_VIEWPORT_MIN_ZOOM*2) ) | |
500 | { | |
501 | vvp->xmpp /= 2; | |
502 | vvp->ympp /= 2; | |
503 | ||
504 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
505 | viewport_google_rezoom ( vvp ); | |
506 | ||
507 | viewport_utm_zone_check(vvp); | |
508 | } | |
509 | } | |
510 | ||
511 | void vik_viewport_zoom_out ( VikViewport *vvp ) | |
512 | { | |
513 | g_return_if_fail ( vvp != NULL ); | |
514 | if ( vvp->xmpp <= (VIK_VIEWPORT_MAX_ZOOM/2) && vvp->ympp <= (VIK_VIEWPORT_MAX_ZOOM/2) ) | |
515 | { | |
516 | vvp->xmpp *= 2; | |
517 | vvp->ympp *= 2; | |
518 | ||
519 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
520 | viewport_google_rezoom ( vvp ); | |
521 | ||
522 | viewport_utm_zone_check(vvp); | |
523 | } | |
524 | } | |
525 | ||
526 | gdouble vik_viewport_get_zoom ( VikViewport *vvp ) | |
527 | { | |
528 | if ( vvp->xmpp == vvp->ympp ) | |
529 | return vvp->xmpp; | |
530 | return 0.0; | |
531 | } | |
532 | ||
533 | gdouble vik_viewport_get_xmpp ( VikViewport *vvp ) | |
534 | { | |
535 | return vvp->xmpp; | |
536 | } | |
537 | ||
538 | gdouble vik_viewport_get_ympp ( VikViewport *vvp ) | |
539 | { | |
540 | return vvp->ympp; | |
541 | } | |
542 | ||
543 | void vik_viewport_set_xmpp ( VikViewport *vvp, gdouble xmpp ) | |
544 | { | |
545 | if ( xmpp >= VIK_VIEWPORT_MIN_ZOOM && xmpp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
546 | vvp->xmpp = xmpp; | |
547 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
548 | viewport_utm_zone_check(vvp); | |
549 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
550 | viewport_google_rezoom ( vvp ); | |
551 | } | |
552 | } | |
553 | ||
554 | void vik_viewport_set_ympp ( VikViewport *vvp, gdouble ympp ) | |
555 | { | |
556 | if ( ympp >= VIK_VIEWPORT_MIN_ZOOM && ympp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
557 | vvp->ympp = ympp; | |
558 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
559 | viewport_utm_zone_check(vvp); | |
560 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
561 | viewport_google_rezoom ( vvp ); | |
562 | } | |
563 | } | |
564 | ||
565 | ||
566 | const VikCoord *vik_viewport_get_center ( VikViewport *vvp ) | |
567 | { | |
568 | g_return_val_if_fail ( vvp != NULL, NULL ); | |
569 | return &(vvp->center); | |
570 | } | |
571 | ||
572 | /* called every time we update coordinates/zoom */ | |
573 | static void viewport_utm_zone_check ( VikViewport *vvp ) | |
574 | { | |
575 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
576 | { | |
577 | struct UTM utm; | |
578 | struct LatLon ll; | |
579 | a_coords_utm_to_latlon ( (struct UTM *) &(vvp->center), &ll ); | |
580 | a_coords_latlon_to_utm ( &ll, &utm ); | |
581 | if ( utm.zone != vvp->center.utm_zone ) | |
582 | *((struct UTM *)(&vvp->center)) = utm; | |
583 | ||
584 | /* misc. stuff so we don't have to check later */ | |
585 | vvp->utm_zone_width = viewport_utm_zone_width ( vvp ); | |
586 | vvp->one_utm_zone = ( vik_viewport_rightmost_zone(vvp) == vik_viewport_leftmost_zone(vvp) ); | |
587 | } | |
588 | } | |
589 | ||
590 | void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll ) | |
591 | { | |
592 | vik_coord_load_from_latlon ( &(vvp->center), vvp->coord_mode, ll ); | |
593 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
594 | viewport_utm_zone_check ( vvp ); | |
595 | } | |
596 | ||
597 | void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm ) | |
598 | { | |
599 | vik_coord_load_from_utm ( &(vvp->center), vvp->coord_mode, utm ); | |
600 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
601 | viewport_utm_zone_check ( vvp ); | |
602 | } | |
603 | ||
604 | void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord ) | |
605 | { | |
606 | vvp->center = *coord; | |
607 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
608 | viewport_utm_zone_check ( vvp ); | |
609 | } | |
610 | ||
611 | void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br ) | |
612 | { | |
613 | g_return_if_fail ( vvp->coord_mode == VIK_COORD_UTM ); | |
614 | ||
615 | /* get center, then just offset */ | |
616 | vik_viewport_center_for_zonen ( vvp, VIK_UTM(ul), zone ); | |
617 | ul->mode = VIK_COORD_UTM; | |
618 | *br = *ul; | |
619 | ||
620 | ul->north_south += (vvp->ympp * vvp->height / 2); | |
621 | ul->east_west -= (vvp->xmpp * vvp->width / 2); | |
622 | br->north_south -= (vvp->ympp * vvp->height / 2); | |
623 | br->east_west += (vvp->xmpp * vvp->width / 2); | |
624 | } | |
625 | ||
626 | void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone) | |
627 | { | |
628 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
629 | *center = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
630 | center->easting -= ( zone - center->zone ) * vvp->utm_zone_width; | |
631 | center->zone = zone; | |
632 | } | |
633 | } | |
634 | ||
635 | gchar vik_viewport_leftmost_zone ( VikViewport *vvp ) | |
636 | { | |
637 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
638 | VikCoord coord; | |
639 | g_assert ( vvp != NULL ); | |
640 | vik_viewport_screen_to_coord ( vvp, 0, 0, &coord ); | |
641 | return coord.utm_zone; | |
642 | } | |
643 | return '\0'; | |
644 | } | |
645 | ||
646 | gchar vik_viewport_rightmost_zone ( VikViewport *vvp ) | |
647 | { | |
648 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
649 | VikCoord coord; | |
650 | g_assert ( vvp != NULL ); | |
651 | vik_viewport_screen_to_coord ( vvp, vvp->width, 0, &coord ); | |
652 | return coord.utm_zone; | |
653 | } | |
654 | return '\0'; | |
655 | } | |
656 | ||
657 | ||
658 | void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y ) | |
659 | { | |
660 | g_return_if_fail ( vvp != NULL ); | |
661 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
662 | /* slightly optimized */ | |
663 | vvp->center.east_west += vvp->xmpp * (x - (vvp->width/2)); | |
664 | vvp->center.north_south += vvp->ympp * ((vvp->height/2) - y); | |
665 | viewport_utm_zone_check ( vvp ); | |
666 | } else { | |
667 | VikCoord tmp; | |
668 | vik_viewport_screen_to_coord ( vvp, x, y, &tmp ); | |
669 | vik_viewport_set_center_coord ( vvp, &tmp ); | |
670 | } | |
671 | } | |
672 | ||
673 | gint vik_viewport_get_width( VikViewport *vvp ) | |
674 | { | |
675 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
676 | return vvp->width; | |
677 | } | |
678 | ||
679 | gint vik_viewport_get_height( VikViewport *vvp ) | |
680 | { | |
681 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
682 | return vvp->height; | |
683 | } | |
684 | ||
685 | void vik_viewport_screen_to_coord ( VikViewport *vvp, int x, int y, VikCoord *coord ) | |
686 | { | |
687 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
688 | int zone_delta; | |
689 | struct UTM *utm = (struct UTM *) coord; | |
690 | coord->mode = VIK_COORD_UTM; | |
691 | ||
692 | g_return_if_fail ( vvp != NULL ); | |
693 | ||
694 | utm->zone = vvp->center.utm_zone; | |
695 | utm->letter = vvp->center.utm_letter; | |
696 | utm->easting = ( ( x - ( vvp->width / 2) ) * vvp->xmpp ) + vvp->center.east_west; | |
697 | zone_delta = floor( (utm->easting - EASTING_OFFSET ) / vvp->utm_zone_width + 0.5 ); | |
698 | utm->zone += zone_delta; | |
699 | utm->easting -= zone_delta * vvp->utm_zone_width; | |
700 | utm->northing = ( ( ( vvp->height / 2) - y ) * vvp->ympp ) + vvp->center.north_south; | |
701 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
702 | coord->mode = VIK_COORD_LATLON; | |
703 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) | |
704 | 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); | |
705 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) { | |
706 | /* google */ | |
707 | coord->east_west = (x - (vvp->width/2)) * vvp->google_calcx_rev_fact + vvp->center.east_west; | |
708 | coord->north_south = ((vvp->height/2) - y) * vvp->google_calcy_rev_fact + vvp->center.north_south; | |
709 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_KH ) { | |
710 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
711 | coord->north_south = vvp->center.north_south + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)); | |
712 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { | |
713 | /* FIXMERCATOR */ | |
714 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
715 | coord->north_south = DEMERCLAT ( MERCLAT(vvp->center.north_south) + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) ); | |
716 | ||
717 | #if 0 | |
718 | --> THIS IS JUNK HERE. | |
719 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
720 | ||
721 | (*y - vvp->height/2) / 256 / 65536 * 180 * vvp->ympp = (MERCLAT(center->lat) - MERCLAT(ll->lat); | |
722 | DML((180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) + ML(cl)) = ll | |
723 | #endif | |
724 | } | |
725 | } | |
726 | } | |
727 | ||
728 | void vik_viewport_coord_to_screen ( VikViewport *vvp, const VikCoord *coord, int *x, int *y ) | |
729 | { | |
730 | static VikCoord tmp; | |
731 | g_return_if_fail ( vvp != NULL ); | |
732 | ||
733 | if ( coord->mode != vvp->coord_mode ) | |
734 | { | |
735 | g_warning ( "Have to convert in vik_viewport_coord_to_screen! This should never happen!"); | |
736 | vik_coord_copy_convert ( coord, vvp->coord_mode, &tmp ); | |
737 | coord = &tmp; | |
738 | } | |
739 | ||
740 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
741 | struct UTM *center = (struct UTM *) &(vvp->center); | |
742 | struct UTM *utm = (struct UTM *) coord; | |
743 | if ( center->zone != utm->zone && vvp->one_utm_zone ) | |
744 | { | |
745 | *x = *y = VIK_VIEWPORT_UTM_WRONG_ZONE; | |
746 | return; | |
747 | } | |
748 | ||
749 | *x = ( (utm->easting - center->easting) / vvp->xmpp ) + (vvp->width / 2) - | |
750 | (center->zone - utm->zone ) * vvp->utm_zone_width / vvp->xmpp; | |
751 | *y = (vvp->height / 2) - ( (utm->northing - center->northing) / vvp->ympp ); | |
752 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
753 | struct LatLon *center = (struct LatLon *) &(vvp->center); | |
754 | struct LatLon *ll = (struct LatLon *) coord; | |
755 | double xx,yy; | |
756 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) { | |
757 | 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 ); | |
758 | *x = xx; *y = yy; | |
759 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) { | |
760 | /* google */ | |
761 | *x = vvp->google_calcx_fact * (ll->lon - center->lon) + (vvp->width/2); | |
762 | *y = vvp->google_calcy_fact * (center->lat - ll->lat) + (vvp->height/2); | |
763 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_KH ) { | |
764 | /* subtract, convert to KH coords; blow it up by 256 */ | |
765 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
766 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (center->lat - ll->lat))*256.0; | |
767 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { | |
768 | /* FIXMERCATOR: Optimize */ | |
769 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
770 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
771 | } | |
772 | } | |
773 | } | |
774 | ||
775 | void a_viewport_clip_line ( gint *x1, gint *y1, gint *x2, gint *y2 ) | |
776 | { | |
777 | if ( *x1 > 20000 || *x1 < -20000 ) { | |
778 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
779 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
780 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
781 | } else if ( *y1 > 20000 || *y1 < -20000 ) { | |
782 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
783 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
784 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
785 | } else if ( *x2 > 20000 || *x2 < -20000 ) { | |
786 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
787 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
788 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
789 | g_print("%f, %d, %d\n", shrinkfactor, *x2, *y2); | |
790 | } else if ( *y2 > 20000 || *y2 < -20000 ) { | |
791 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
792 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
793 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
794 | } | |
795 | } | |
796 | ||
797 | void vik_viewport_draw_line ( VikViewport *vvp, GdkGC *gc, gint x1, gint y1, gint x2, gint y2 ) | |
798 | { | |
799 | if ( ! ( ( x1 < 0 && x2 < 0 ) || ( y1 < 0 && y2 < 0 ) || | |
800 | ( x1 > vvp->width && x2 > vvp->width ) || ( y1 > vvp->height && y2 > vvp->height ) ) ) { | |
801 | /*** clipping, yeah! ***/ | |
802 | a_viewport_clip_line ( &x1, &y1, &x2, &y2 ); | |
803 | gdk_draw_line ( vvp->scr_buffer, gc, x1, y1, x2, y2); | |
804 | } | |
805 | } | |
806 | ||
807 | void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 ) | |
808 | { | |
809 | if ( x1 > -10 && x1 < vvp->width + 10 && y1 > -10 && y1 < vvp->height + 10 ) | |
810 | gdk_draw_rectangle ( vvp->scr_buffer, gc, filled, x1, y1, x2, y2); | |
811 | } | |
812 | ||
813 | void vik_viewport_draw_string ( VikViewport *vvp, GdkFont *font, GdkGC *gc, gint x1, gint y1, const gchar *string ) | |
814 | { | |
815 | if ( x1 > -100 && x1 < vvp->width + 100 && y1 > -100 && y1 < vvp->height + 100 ) | |
816 | gdk_draw_string ( vvp->scr_buffer, font, gc, x1, y1, string ); | |
817 | } | |
818 | ||
819 | /* shouldn't use this -- slow -- change the alpha channel instead. */ | |
820 | void vik_viewport_draw_pixbuf_with_alpha ( VikViewport *vvp, GdkPixbuf *pixbuf, gint alpha, | |
821 | gint src_x, gint src_y, gint dest_x, gint dest_y, gint w, gint h ) | |
822 | { | |
823 | gint real_dest_x = MAX(dest_x,0); | |
824 | gint real_dest_y = MAX(dest_y,0); | |
825 | ||
826 | if ( alpha == 0 ) | |
827 | return; /* don't waste your time */ | |
828 | ||
829 | if ( w > vvp->alpha_pixbuf_width || h > vvp->alpha_pixbuf_height ) | |
830 | { | |
831 | if ( vvp->alpha_pixbuf ) | |
832 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
833 | vvp->alpha_pixbuf_width = MAX(w,vvp->alpha_pixbuf_width); | |
834 | vvp->alpha_pixbuf_height = MAX(h,vvp->alpha_pixbuf_height); | |
835 | vvp->alpha_pixbuf = gdk_pixbuf_new ( GDK_COLORSPACE_RGB, FALSE, 8, vvp->alpha_pixbuf_width, vvp->alpha_pixbuf_height ); | |
836 | } | |
837 | ||
838 | w = MIN(w,vvp->width - dest_x); | |
839 | h = MIN(h,vvp->height - dest_y); | |
840 | ||
841 | /* check that we are drawing within boundaries. */ | |
842 | src_x += (real_dest_x - dest_x); | |
843 | src_y += (real_dest_y - dest_y); | |
844 | w -= (real_dest_x - dest_x); | |
845 | h -= (real_dest_y - dest_y); | |
846 | ||
847 | gdk_pixbuf_get_from_drawable ( vvp->alpha_pixbuf, vvp->scr_buffer, NULL, | |
848 | real_dest_x, real_dest_y, 0, 0, w, h ); | |
849 | ||
850 | /* do a composite */ | |
851 | gdk_pixbuf_composite ( pixbuf, vvp->alpha_pixbuf, 0, 0, w, h, -src_x, -src_y, 1, 1, 0, alpha ); | |
852 | ||
853 | /* draw pixbuf_tmp */ | |
854 | vik_viewport_draw_pixbuf ( vvp, vvp->alpha_pixbuf, 0, 0, real_dest_x, real_dest_y, w, h ); | |
855 | } | |
856 | ||
857 | void vik_viewport_draw_pixbuf ( VikViewport *vvp, GdkPixbuf *pixbuf, gint src_x, gint src_y, | |
858 | gint dest_x, gint dest_y, gint w, gint h ) | |
859 | { | |
860 | gdk_draw_pixbuf ( vvp->scr_buffer, | |
861 | // GTK_WIDGET(vvp)->style->black_gc, | |
862 | NULL, | |
863 | pixbuf, | |
864 | src_x, src_y, dest_x, dest_y, w, h, | |
865 | GDK_RGB_DITHER_NONE, 0, 0 ); | |
866 | } | |
867 | ||
868 | void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2 ) | |
869 | { | |
870 | gdk_draw_arc ( vvp->scr_buffer, gc, filled, x, y, width, height, angle1, angle2 ); | |
871 | } | |
872 | ||
873 | ||
874 | void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints ) | |
875 | { | |
876 | gdk_draw_polygon ( vvp->scr_buffer, gc, filled, points, npoints ); | |
877 | } | |
878 | ||
879 | VikCoordMode vik_viewport_get_coord_mode ( const VikViewport *vvp ) | |
880 | { | |
881 | g_assert ( vvp ); | |
882 | return vvp->coord_mode; | |
883 | } | |
884 | ||
885 | static void viewport_set_coord_mode ( VikViewport *vvp, VikCoordMode mode ) | |
886 | { | |
887 | g_return_if_fail ( vvp != NULL ); | |
888 | vvp->coord_mode = mode; | |
889 | vik_coord_convert ( &(vvp->center), mode ); | |
890 | } | |
891 | ||
892 | /* Thanks GPSDrive */ | |
893 | 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 ) | |
894 | { | |
895 | int px, py; | |
896 | gdouble dif, lat, lon; | |
897 | double Ra = Radius[90+(gint)zero_lat]; | |
898 | ||
899 | px = (mapSizeX2 - x) * pixelfact_x; | |
900 | py = (-mapSizeY2 + y) * pixelfact_y; | |
901 | ||
902 | lat = zero_lat - py / Ra; | |
903 | lat = zero_lat - py / Ra; | |
904 | lon = | |
905 | zero_long - | |
906 | px / (Ra * | |
907 | cos (lat * DEG2RAD)); | |
908 | ||
909 | dif = lat * (1 - (cos ((fabs (lon - zero_long)) * DEG2RAD))); | |
910 | lat = lat - dif / 1.5; | |
911 | lon = | |
912 | zero_long - | |
913 | px / (Ra * | |
914 | cos (lat * DEG2RAD)); | |
915 | ||
916 | *lt = lat; | |
917 | *lg = lon; | |
918 | return (TRUE); | |
919 | } | |
920 | ||
921 | /* Thanks GPSDrive */ | |
922 | 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 ) | |
923 | { | |
924 | double dif; | |
925 | double Ra; | |
926 | gint mapSizeX = 2 * mapSizeX2; | |
927 | gint mapSizeY = 2 * mapSizeY2; | |
928 | ||
929 | g_assert ( lt >= -90.0 && lt <= 90.0 ); | |
930 | // lg *= rad2deg; // FIXME, optimize equations | |
931 | // lt *= rad2deg; | |
932 | Ra = Radius[90+(gint)lt]; | |
933 | *x = Ra * | |
934 | cos (lt*DEG2RAD) * (lg - zero_long); | |
935 | *y = Ra * (lt - zero_lat); | |
936 | dif = Ra * RAD2DEG * (1 - (cos ((DEG2RAD * (lg - zero_long))))); | |
937 | *y = *y + dif / 1.85; | |
938 | *x = *x / pixelfact_x; | |
939 | *y = *y / pixelfact_y; | |
940 | *x = mapSizeX2 - *x; | |
941 | *y += mapSizeY2; | |
942 | if ((*x < 0)||(*x >= mapSizeX)||(*y < 0)||(*y >= mapSizeY)) | |
943 | return (FALSE); | |
944 | return (TRUE); | |
945 | } | |
946 | ||
947 | static void viewport_init_ra() | |
948 | { | |
949 | static gboolean done_before = FALSE; | |
950 | if ( !done_before ) | |
951 | { | |
952 | gint i; | |
953 | for ( i = -90; i <= 90; i++) | |
954 | Radius[i+90] = calcR ( (double)i ) * DEG2RAD; | |
955 | done_before = TRUE; | |
956 | } | |
957 | } | |
958 | ||
959 | double calcR (double lat) | |
960 | { | |
961 | double a = 6378.137, r, sc, x, y, z; | |
962 | double e2 = 0.081082 * 0.081082; | |
963 | /* | |
964 | * the radius of curvature of an ellipsoidal Earth in the plane of the | |
965 | * meridian is given by | |
966 | * | |
967 | * R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2) | |
968 | * | |
969 | * | |
970 | * where a is the equatorial radius, b is the polar radius, and e is | |
971 | * the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2) | |
972 | * | |
973 | * a = 6378 km (3963 mi) Equatorial radius (surface to center distance) | |
974 | * b = 6356.752 km (3950 mi) Polar radius (surface to center distance) e | |
975 | * = 0.081082 Eccentricity | |
976 | */ | |
977 | ||
978 | lat = lat * DEG2RAD; | |
979 | sc = sin (lat); | |
980 | x = a * (1.0 - e2); | |
981 | z = 1.0 - e2 * sc * sc; | |
982 | y = pow (z, 1.5); | |
983 | r = x / y; | |
984 | r = r * 1000.0; | |
985 | return r; | |
986 | } | |
987 | ||
988 | gboolean vik_viewport_is_one_zone ( VikViewport *vvp ) | |
989 | { | |
990 | return vvp->coord_mode == VIK_COORD_UTM && vvp->one_utm_zone; | |
991 | } | |
992 | ||
993 | void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout ) | |
994 | { | |
995 | if ( x > -100 && x < vvp->width + 100 && y > -100 && y < vvp->height + 100 ) | |
996 | gdk_draw_layout ( vvp->scr_buffer, gc, x, y, layout ); | |
997 | } | |
998 | ||
999 | void vik_gc_get_fg_color ( GdkGC *gc, GdkColor *dest ) | |
1000 | { | |
1001 | static GdkGCValues values; | |
1002 | gdk_gc_get_values ( gc, &values ); | |
1003 | gdk_colormap_query_color ( gdk_colormap_get_system(), values.foreground.pixel, dest ); | |
1004 | } | |
1005 | ||
1006 | GdkFunction vik_gc_get_function ( GdkGC *gc ) | |
1007 | { | |
1008 | static GdkGCValues values; | |
1009 | gdk_gc_get_values ( gc, &values ); | |
1010 | return values.function; | |
1011 | } | |
1012 | ||
1013 | void vik_viewport_set_drawmode ( VikViewport *vvp, VikViewportDrawMode drawmode ) | |
1014 | { | |
1015 | vvp->drawmode = drawmode; | |
1016 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
1017 | viewport_set_coord_mode ( vvp, VIK_COORD_UTM ); | |
1018 | else { | |
1019 | viewport_set_coord_mode ( vvp, VIK_COORD_LATLON ); | |
1020 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_GOOGLE ) | |
1021 | viewport_google_rezoom ( vvp ); | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | VikViewportDrawMode vik_viewport_get_drawmode ( VikViewport *vvp ) | |
1026 | { | |
1027 | return vvp->drawmode; | |
1028 | } | |
1029 | ||
1030 | static void viewport_google_rezoom ( VikViewport *vvp ) | |
1031 | { | |
1032 | vvp->google_calcx_fact = (GOOGLEMAPS_ZOOM_ONE_MPP * 65536.0 * 0.7716245833877 / vvp->xmpp); | |
1033 | vvp->google_calcy_fact = (GOOGLEMAPS_ZOOM_ONE_MPP * 65536.0 / vvp->ympp); | |
1034 | vvp->google_calcx_rev_fact = 1 / vvp->google_calcx_fact; | |
1035 | vvp->google_calcy_rev_fact = 1 / vvp->google_calcy_fact; | |
1036 | } | |
1037 | ||
1038 | /******** triggering *******/ | |
1039 | void vik_viewport_set_trigger ( VikViewport *vp, gpointer trigger ) | |
1040 | { | |
1041 | vp->trigger = trigger; | |
1042 | } | |
1043 | ||
1044 | gpointer vik_viewport_get_trigger ( VikViewport *vp ) | |
1045 | { | |
1046 | return vp->trigger; | |
1047 | } | |
1048 | ||
1049 | void vik_viewport_snapshot_save ( VikViewport *vp ) | |
1050 | { | |
1051 | gdk_draw_drawable ( vp->snapshot_buffer, vp->background_gc, vp->scr_buffer, 0, 0, 0, 0, -1, -1 ); | |
1052 | } | |
1053 | ||
1054 | void vik_viewport_snapshot_load ( VikViewport *vp ) | |
1055 | { | |
1056 | gdk_draw_drawable ( vp->scr_buffer, vp->background_gc, vp->snapshot_buffer, 0, 0, 0, 0, -1, -1 ); | |
1057 | } | |
1058 | ||
1059 | void vik_viewport_set_half_drawn(VikViewport *vp, gboolean half_drawn) | |
1060 | { | |
1061 | vp->half_drawn = half_drawn; | |
1062 | } | |
1063 | ||
1064 | gboolean vik_viewport_get_half_drawn( VikViewport *vp ) | |
1065 | { | |
1066 | return vp->half_drawn; | |
1067 | } | |
1068 | ||
1069 | ||
1070 | const gchar *vik_viewport_get_drawmode_name(VikViewport *vv, VikViewportDrawMode mode) | |
1071 | { | |
1072 | const gchar *name = NULL; | |
1073 | VikWindow *vw = NULL; | |
1074 | GtkWidget *mode_button; | |
1075 | GtkWidget *label; | |
1076 | ||
1077 | vw = VIK_WINDOW_FROM_WIDGET(vv); | |
1078 | mode_button = vik_window_get_drawmode_button(vw, mode); | |
1079 | label = gtk_bin_get_child(GTK_BIN(mode_button)); | |
1080 | ||
1081 | name = gtk_label_get_text ( GTK_LABEL(label) ); | |
1082 | ||
1083 | return name; | |
1084 | ||
1085 | } | |
1086 | ||
1087 | void vik_viewport_get_min_max_lat_lon ( VikViewport *vp, gdouble *min_lat, gdouble *max_lat, gdouble *min_lon, gdouble *max_lon ) | |
1088 | { | |
1089 | VikCoord tleft, tright, bleft, bright; | |
1090 | ||
1091 | vik_viewport_screen_to_coord ( vp, 0, 0, &tleft ); | |
1092 | vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright ); | |
1093 | vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft ); | |
1094 | vik_viewport_screen_to_coord ( vp, vp->width, vp->height, &bright ); | |
1095 | ||
1096 | vik_coord_convert(&tleft, VIK_COORD_LATLON); | |
1097 | vik_coord_convert(&tright, VIK_COORD_LATLON); | |
1098 | vik_coord_convert(&bleft, VIK_COORD_LATLON); | |
1099 | vik_coord_convert(&bright, VIK_COORD_LATLON); | |
1100 | ||
1101 | *max_lat = MAX(tleft.north_south, tright.north_south); | |
1102 | *min_lat = MIN(bleft.north_south, bright.north_south); | |
1103 | *max_lon = MAX(tright.east_west, bright.east_west); | |
1104 | *min_lon = MIN(tleft.east_west, bleft.east_west); | |
1105 | } |