]>
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 | * 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 | */ | |
8c00358d GB |
26 | #ifdef HAVE_CONFIG_H |
27 | #include "config.h" | |
28 | #endif | |
50a14534 EB |
29 | |
30 | #define DEFAULT_BACKGROUND_COLOR "#CCCCCC" | |
31 | ||
32 | #include <gtk/gtk.h> | |
8c00358d | 33 | #ifdef HAVE_MATH_H |
50a14534 | 34 | #include <math.h> |
8c00358d | 35 | #endif |
50a14534 EB |
36 | |
37 | #include "coords.h" | |
38 | #include "vikcoord.h" | |
a59e6eb9 | 39 | #include "vikwindow.h" |
50a14534 EB |
40 | #include "vikviewport.h" |
41 | ||
42 | #include "mapcoord.h" | |
43 | ||
44 | /* for ALTI_TO_MPP */ | |
45 | #include "globals.h" | |
50a14534 EB |
46 | |
47 | static gdouble EASTING_OFFSET = 500000.0; | |
48 | ||
49 | static void viewport_class_init ( VikViewportClass *klass ); | |
50 | static void viewport_init ( VikViewport *vvp ); | |
51 | static void viewport_finalize ( GObject *gob ); | |
52 | static void viewport_utm_zone_check ( VikViewport *vvp ); | |
53 | ||
54 | 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 ); | |
55 | 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 ); | |
56 | double calcR (double lat); | |
57 | ||
58 | static double Radius[181]; | |
59 | static void viewport_init_ra(); | |
60 | ||
61 | static GObjectClass *parent_class; | |
62 | ||
50a14534 EB |
63 | |
64 | struct _VikViewport { | |
65 | GtkDrawingArea drawing_area; | |
66 | GdkPixmap *scr_buffer; | |
67 | gint width, height; | |
68 | VikCoord center; | |
69 | VikCoordMode coord_mode; | |
70 | gdouble xmpp, ympp; | |
71 | ||
72 | GdkPixbuf *alpha_pixbuf; | |
73 | guint8 alpha_pixbuf_width; | |
74 | guint8 alpha_pixbuf_height; | |
75 | ||
76 | gdouble utm_zone_width; | |
77 | gboolean one_utm_zone; | |
78 | ||
79 | GdkGC *background_gc; | |
80 | GdkColor background_color; | |
4e485bf3 | 81 | GdkGC *scale_bg_gc; |
35c7c0ba | 82 | gboolean draw_scale; |
c933487f | 83 | gboolean draw_centermark; |
50a14534 EB |
84 | |
85 | /* subset of coord types. lat lon can be plotted in 2 ways, google or exp. */ | |
86 | VikViewportDrawMode drawmode; | |
87 | ||
88 | /* handy conversion factors which make google plotting extremely fast */ | |
89 | gdouble google_calcx_fact; | |
90 | gdouble google_calcy_fact; | |
91 | gdouble google_calcx_rev_fact; | |
92 | gdouble google_calcy_rev_fact; | |
0df66d57 EB |
93 | |
94 | /* trigger stuff */ | |
95 | gpointer trigger; | |
96 | GdkPixmap *snapshot_buffer; | |
97 | gboolean half_drawn; | |
50a14534 EB |
98 | }; |
99 | ||
100 | static gdouble | |
101 | viewport_utm_zone_width ( VikViewport *vvp ) | |
102 | { | |
103 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
104 | struct LatLon ll; | |
105 | ||
106 | /* get latitude of screen bottom */ | |
107 | struct UTM utm = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
108 | utm.northing -= vvp -> height * vvp -> ympp / 2; | |
109 | a_coords_utm_to_latlon ( &utm, &ll ); | |
110 | ||
111 | /* boundary */ | |
112 | ll.lon = (utm.zone - 1) * 6 - 180 ; | |
113 | a_coords_latlon_to_utm ( &ll, &utm); | |
114 | return fabs ( utm.easting - EASTING_OFFSET ) * 2; | |
115 | } else | |
116 | return 0.0; | |
117 | } | |
118 | ||
119 | ||
120 | GType vik_viewport_get_type (void) | |
121 | { | |
122 | static GType vvp_type = 0; | |
123 | ||
124 | if (!vvp_type) | |
125 | { | |
126 | static const GTypeInfo vvp_info = | |
127 | { | |
128 | sizeof (VikViewportClass), | |
129 | NULL, /* base_init */ | |
130 | NULL, /* base_finalize */ | |
131 | (GClassInitFunc) viewport_class_init, | |
132 | NULL, /* class_finalize */ | |
133 | NULL, /* class_data */ | |
134 | sizeof (VikViewport), | |
135 | 0, | |
136 | (GInstanceInitFunc) viewport_init, | |
137 | }; | |
138 | vvp_type = g_type_register_static ( GTK_TYPE_DRAWING_AREA, "VikViewport", &vvp_info, 0 ); | |
139 | } | |
140 | return vvp_type; | |
141 | } | |
142 | ||
143 | static void viewport_class_init ( VikViewportClass *klass ) | |
144 | { | |
145 | /* Destructor */ | |
146 | GObjectClass *object_class; | |
147 | ||
148 | object_class = G_OBJECT_CLASS (klass); | |
149 | ||
150 | object_class->finalize = viewport_finalize; | |
151 | ||
152 | parent_class = g_type_class_peek_parent (klass); | |
153 | } | |
154 | ||
24277274 | 155 | VikViewport *vik_viewport_new () |
50a14534 | 156 | { |
a59e6eb9 | 157 | VikViewport *vv = VIK_VIEWPORT ( g_object_new ( VIK_VIEWPORT_TYPE, NULL ) ); |
a59e6eb9 | 158 | return vv; |
50a14534 EB |
159 | } |
160 | ||
161 | static void viewport_init ( VikViewport *vvp ) | |
162 | { | |
163 | viewport_init_ra(); | |
164 | ||
165 | /* TODO: not static */ | |
166 | vvp->xmpp = 4.0; | |
167 | vvp->ympp = 4.0; | |
6a9ff0ee QT |
168 | vvp->coord_mode = VIK_COORD_LATLON; |
169 | vvp->drawmode = VIK_VIEWPORT_DRAWMODE_MERCATOR; | |
ee180665 | 170 | vvp->center.mode = VIK_COORD_LATLON; |
4b53548b QT |
171 | vvp->center.north_south = 40.714490; |
172 | vvp->center.east_west = -74.007130; | |
50a14534 EB |
173 | vvp->center.utm_zone = 31; |
174 | vvp->center.utm_letter = 'N'; | |
175 | vvp->scr_buffer = NULL; | |
176 | vvp->alpha_pixbuf = NULL; | |
177 | vvp->alpha_pixbuf_width = vvp->alpha_pixbuf_height = 0; | |
178 | vvp->utm_zone_width = 0.0; | |
179 | vvp->background_gc = NULL; | |
4e485bf3 | 180 | vvp->scale_bg_gc = NULL; |
35c7c0ba | 181 | vvp->draw_scale = TRUE; |
c933487f | 182 | vvp->draw_centermark = TRUE; |
0df66d57 EB |
183 | |
184 | vvp->trigger = NULL; | |
185 | vvp->snapshot_buffer = NULL; | |
186 | vvp->half_drawn = FALSE; | |
187 | ||
50a14534 | 188 | g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL); |
165d30aa EB |
189 | |
190 | GTK_WIDGET_SET_FLAGS(vvp, GTK_CAN_FOCUS); /* allow VVP to have focus -- enabling key events, etc */ | |
50a14534 EB |
191 | } |
192 | ||
193 | GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp ) | |
194 | { | |
195 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
196 | *rv = vvp->background_color; | |
197 | return rv; | |
198 | } | |
199 | ||
200 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
201 | const gchar *vik_viewport_get_background_color ( VikViewport *vvp ) | |
202 | { | |
203 | static gchar color[8]; | |
204 | 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)); | |
205 | return color; | |
206 | } | |
207 | ||
208 | void vik_viewport_set_background_color ( VikViewport *vvp, const gchar *colorname ) | |
209 | { | |
210 | g_assert ( vvp->background_gc ); | |
211 | gdk_color_parse ( colorname, &(vvp->background_color) ); | |
212 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, &(vvp->background_color) ); | |
213 | } | |
214 | ||
215 | void vik_viewport_set_background_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
216 | { | |
217 | g_assert ( vvp->background_gc ); | |
218 | vvp->background_color = *color; | |
219 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, color ); | |
220 | } | |
221 | ||
222 | ||
223 | GdkGC *vik_viewport_new_gc ( VikViewport *vvp, const gchar *colorname, gint thickness ) | |
224 | { | |
225 | GdkGC *rv; | |
226 | GdkColor color; | |
227 | ||
228 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
229 | gdk_color_parse ( colorname, &color ); | |
230 | gdk_gc_set_rgb_fg_color ( rv, &color ); | |
231 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
232 | return rv; | |
233 | } | |
234 | ||
235 | GdkGC *vik_viewport_new_gc_from_color ( VikViewport *vvp, GdkColor *color, gint thickness ) | |
236 | { | |
237 | GdkGC *rv; | |
238 | ||
239 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
240 | gdk_gc_set_rgb_fg_color ( rv, color ); | |
241 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
242 | return rv; | |
243 | } | |
244 | ||
245 | void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint height ) | |
246 | { | |
247 | vvp->width = width; | |
248 | vvp->height = height; | |
249 | if ( vvp->scr_buffer ) | |
250 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
251 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
0df66d57 EB |
252 | |
253 | /* TODO trigger: only if this is enabled !!! */ | |
254 | if ( vvp->snapshot_buffer ) | |
255 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
256 | vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
50a14534 EB |
257 | } |
258 | ||
259 | ||
260 | GdkPixmap *vik_viewport_get_pixmap ( VikViewport *vvp ) | |
261 | { | |
262 | return vvp->scr_buffer; | |
263 | } | |
264 | ||
265 | gboolean vik_viewport_configure ( VikViewport *vvp ) | |
266 | { | |
267 | g_return_val_if_fail ( vvp != NULL, TRUE ); | |
268 | ||
269 | vvp->width = GTK_WIDGET(vvp)->allocation.width; | |
270 | vvp->height = GTK_WIDGET(vvp)->allocation.height; | |
271 | ||
272 | if ( vvp->scr_buffer ) | |
273 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
274 | ||
275 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
276 | ||
0df66d57 EB |
277 | /* TODO trigger: only if enabled! */ |
278 | if ( vvp->snapshot_buffer ) | |
279 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
280 | ||
281 | vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
282 | /* TODO trigger */ | |
283 | ||
50a14534 EB |
284 | /* this is down here so it can get a GC (necessary?) */ |
285 | if ( ! vvp->background_gc ) | |
286 | { | |
287 | vvp->background_gc = vik_viewport_new_gc ( vvp, "", 1 ); | |
288 | vik_viewport_set_background_color ( vvp, DEFAULT_BACKGROUND_COLOR ); /* set to "backup" color in vvp->background_color */ | |
289 | } | |
4e485bf3 QT |
290 | if ( !vvp->scale_bg_gc) { |
291 | vvp->scale_bg_gc = vik_viewport_new_gc(vvp, "grey", 3); | |
292 | } | |
50a14534 EB |
293 | |
294 | return FALSE; | |
295 | } | |
296 | ||
297 | static void viewport_finalize ( GObject *gob ) | |
298 | { | |
299 | VikViewport *vvp = VIK_VIEWPORT(gob); | |
300 | ||
301 | g_return_if_fail ( vvp != NULL ); | |
302 | ||
303 | if ( vvp->scr_buffer ) | |
304 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
305 | ||
0df66d57 EB |
306 | if ( vvp->snapshot_buffer ) |
307 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
308 | ||
50a14534 EB |
309 | if ( vvp->alpha_pixbuf ) |
310 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
311 | ||
312 | if ( vvp->background_gc ) | |
313 | g_object_unref ( G_OBJECT ( vvp->background_gc ) ); | |
314 | ||
4e485bf3 QT |
315 | if ( vvp->scale_bg_gc ) { |
316 | g_object_unref ( G_OBJECT ( vvp->scale_bg_gc ) ); | |
317 | vvp->scale_bg_gc = NULL; | |
318 | } | |
319 | ||
50a14534 EB |
320 | G_OBJECT_CLASS(parent_class)->finalize(gob); |
321 | } | |
322 | ||
323 | void vik_viewport_clear ( VikViewport *vvp ) | |
324 | { | |
325 | g_return_if_fail ( vvp != NULL ); | |
326 | gdk_draw_rectangle(GDK_DRAWABLE(vvp->scr_buffer), vvp->background_gc, TRUE, 0, 0, vvp->width, vvp->height); | |
327 | } | |
328 | ||
35c7c0ba EB |
329 | void vik_viewport_set_draw_scale ( VikViewport *vvp, gboolean draw_scale ) |
330 | { | |
331 | vvp->draw_scale = draw_scale; | |
332 | } | |
333 | ||
334 | gboolean vik_viewport_get_draw_scale ( VikViewport *vvp ) | |
335 | { | |
336 | return vvp->draw_scale; | |
337 | } | |
338 | ||
acaf7113 AF |
339 | void vik_viewport_draw_scale ( VikViewport *vvp ) |
340 | { | |
35c7c0ba EB |
341 | if ( vvp->draw_scale ) { |
342 | VikCoord left, right; | |
343 | gdouble unit, base, diff, old_unit, old_diff, ratio; | |
344 | gint odd, len, PAD = 10, SCSIZE = 5, HEIGHT=10; | |
345 | PangoFontDescription *pfd; | |
346 | PangoLayout *pl; | |
347 | gchar s[128]; | |
acaf7113 | 348 | |
35c7c0ba | 349 | g_return_if_fail ( vvp != NULL ); |
acaf7113 | 350 | |
35c7c0ba EB |
351 | vik_viewport_screen_to_coord ( vvp, 0, vvp->height, &left ); |
352 | vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height, &right ); | |
acaf7113 | 353 | |
35c7c0ba EB |
354 | base = vik_coord_diff ( &left, &right ); // in meters |
355 | ratio = (vvp->width/SCSIZE)/base; | |
acaf7113 | 356 | |
35c7c0ba EB |
357 | unit = 1; |
358 | diff = fabs(base-unit); | |
acaf7113 AF |
359 | old_unit = unit; |
360 | old_diff = diff; | |
35c7c0ba EB |
361 | odd = 1; |
362 | while (diff <= old_diff) { | |
363 | old_unit = unit; | |
364 | old_diff = diff; | |
365 | unit = unit * (odd%2 ? 5 : 2); | |
366 | diff = fabs(base-unit); | |
367 | odd++; | |
368 | } | |
369 | unit = old_unit; | |
370 | len = unit * ratio; | |
acaf7113 | 371 | |
4e485bf3 QT |
372 | /* white background */ |
373 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
374 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); | |
375 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
376 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); | |
377 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
378 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); | |
379 | /* black scale */ | |
35c7c0ba | 380 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 381 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); |
35c7c0ba | 382 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 383 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); |
35c7c0ba | 384 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 385 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); |
35c7c0ba EB |
386 | if (odd%2) { |
387 | int i; | |
388 | for (i=1; i<5; i++) { | |
4e485bf3 QT |
389 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
390 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
35c7c0ba | 391 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 392 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
35c7c0ba EB |
393 | } |
394 | } else { | |
395 | int i; | |
396 | for (i=1; i<10; i++) { | |
4e485bf3 QT |
397 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
398 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
35c7c0ba EB |
399 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
400 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
401 | } | |
acaf7113 | 402 | } |
35c7c0ba EB |
403 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); |
404 | pfd = pango_font_description_from_string ("Sans 8"); // FIXME: settable option? global variable? | |
405 | pango_layout_set_font_description (pl, pfd); | |
406 | pango_font_description_free (pfd); | |
407 | ||
408 | if (unit >= 1000) { | |
409 | sprintf(s, "%d km", (int)unit/1000); | |
410 | } else { | |
411 | sprintf(s, "%d m", (int)unit); | |
acaf7113 | 412 | } |
35c7c0ba EB |
413 | pango_layout_set_text(pl, s, -1); |
414 | vik_viewport_draw_layout(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
acaf7113 | 415 | PAD + len + PAD, vvp->height - PAD - 10, pl); |
6278ccc6 | 416 | g_object_unref(pl); |
e6869c62 | 417 | pl = NULL; |
35c7c0ba | 418 | } |
acaf7113 AF |
419 | } |
420 | ||
c933487f QT |
421 | void vik_viewport_set_draw_centermark ( VikViewport *vvp, gboolean draw_centermark ) |
422 | { | |
423 | vvp->draw_centermark = draw_centermark; | |
424 | } | |
425 | ||
426 | gboolean vik_viewport_get_draw_centermark ( VikViewport *vvp ) | |
427 | { | |
428 | return vvp->draw_centermark; | |
429 | } | |
430 | ||
431 | void vik_viewport_draw_centermark ( VikViewport *vvp ) | |
432 | { | |
433 | if ( !vvp->draw_centermark ) | |
434 | return; | |
435 | ||
3df69a6b QT |
436 | const int len = 30; |
437 | const int gap = 4; | |
c933487f QT |
438 | int center_x = vvp->width/2; |
439 | int center_y = vvp->height/2; | |
440 | GdkGC * black_gc = GTK_WIDGET(&vvp->drawing_area)->style->black_gc; | |
441 | ||
442 | /* white back ground */ | |
3df69a6b QT |
443 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x - len, center_y, center_x - gap, center_y); |
444 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x + gap, center_y, center_x + len, center_y); | |
445 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y - len, center_x, center_y - gap); | |
446 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f | 447 | /* black fore ground */ |
3df69a6b QT |
448 | vik_viewport_draw_line(vvp, black_gc, center_x - len, center_y, center_x - gap, center_y); |
449 | vik_viewport_draw_line(vvp, black_gc, center_x + gap, center_y, center_x + len, center_y); | |
450 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y - len, center_x, center_y - gap); | |
451 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f QT |
452 | |
453 | } | |
454 | ||
50a14534 EB |
455 | void vik_viewport_sync ( VikViewport *vvp ) |
456 | { | |
457 | g_return_if_fail ( vvp != NULL ); | |
458 | 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); | |
459 | } | |
460 | ||
461 | void vik_viewport_pan_sync ( VikViewport *vvp, gint x_off, gint y_off ) | |
462 | { | |
acaf7113 AF |
463 | gint x, y, wid, hei; |
464 | ||
50a14534 EB |
465 | g_return_if_fail ( vvp != NULL ); |
466 | 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 |
467 | |
468 | if (x_off >= 0) { | |
469 | x = 0; | |
470 | wid = x_off; | |
471 | } else { | |
472 | x = vvp->width+x_off; | |
473 | wid = -x_off; | |
474 | } | |
475 | if (y_off >= 0) { | |
476 | y = 0; | |
477 | hei = y_off; | |
478 | } else { | |
479 | y = vvp->height+y_off; | |
480 | hei = -y_off; | |
481 | } | |
482 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), x, 0, wid, vvp->height); | |
483 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), 0, y, vvp->width, hei); | |
50a14534 EB |
484 | } |
485 | ||
486 | void vik_viewport_set_zoom ( VikViewport *vvp, gdouble xympp ) | |
487 | { | |
488 | g_return_if_fail ( vvp != NULL ); | |
489 | if ( xympp >= VIK_VIEWPORT_MIN_ZOOM && xympp <= VIK_VIEWPORT_MAX_ZOOM ) | |
490 | vvp->xmpp = vvp->ympp = xympp; | |
491 | ||
492 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
493 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
494 | } |
495 | ||
496 | /* or could do factor */ | |
497 | void vik_viewport_zoom_in ( VikViewport *vvp ) | |
498 | { | |
499 | g_return_if_fail ( vvp != NULL ); | |
500 | if ( vvp->xmpp >= (VIK_VIEWPORT_MIN_ZOOM*2) && vvp->ympp >= (VIK_VIEWPORT_MIN_ZOOM*2) ) | |
501 | { | |
502 | vvp->xmpp /= 2; | |
503 | vvp->ympp /= 2; | |
504 | ||
50a14534 EB |
505 | viewport_utm_zone_check(vvp); |
506 | } | |
507 | } | |
508 | ||
509 | void vik_viewport_zoom_out ( VikViewport *vvp ) | |
510 | { | |
511 | g_return_if_fail ( vvp != NULL ); | |
512 | if ( vvp->xmpp <= (VIK_VIEWPORT_MAX_ZOOM/2) && vvp->ympp <= (VIK_VIEWPORT_MAX_ZOOM/2) ) | |
513 | { | |
514 | vvp->xmpp *= 2; | |
515 | vvp->ympp *= 2; | |
516 | ||
50a14534 EB |
517 | viewport_utm_zone_check(vvp); |
518 | } | |
519 | } | |
520 | ||
521 | gdouble vik_viewport_get_zoom ( VikViewport *vvp ) | |
522 | { | |
523 | if ( vvp->xmpp == vvp->ympp ) | |
524 | return vvp->xmpp; | |
525 | return 0.0; | |
526 | } | |
527 | ||
528 | gdouble vik_viewport_get_xmpp ( VikViewport *vvp ) | |
529 | { | |
530 | return vvp->xmpp; | |
531 | } | |
532 | ||
533 | gdouble vik_viewport_get_ympp ( VikViewport *vvp ) | |
534 | { | |
535 | return vvp->ympp; | |
536 | } | |
537 | ||
538 | void vik_viewport_set_xmpp ( VikViewport *vvp, gdouble xmpp ) | |
539 | { | |
540 | if ( xmpp >= VIK_VIEWPORT_MIN_ZOOM && xmpp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
541 | vvp->xmpp = xmpp; | |
542 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
543 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
544 | } |
545 | } | |
546 | ||
547 | void vik_viewport_set_ympp ( VikViewport *vvp, gdouble ympp ) | |
548 | { | |
549 | if ( ympp >= VIK_VIEWPORT_MIN_ZOOM && ympp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
550 | vvp->ympp = ympp; | |
551 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
552 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
553 | } |
554 | } | |
555 | ||
556 | ||
557 | const VikCoord *vik_viewport_get_center ( VikViewport *vvp ) | |
558 | { | |
559 | g_return_val_if_fail ( vvp != NULL, NULL ); | |
560 | return &(vvp->center); | |
561 | } | |
562 | ||
563 | /* called every time we update coordinates/zoom */ | |
564 | static void viewport_utm_zone_check ( VikViewport *vvp ) | |
565 | { | |
566 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
567 | { | |
568 | struct UTM utm; | |
569 | struct LatLon ll; | |
570 | a_coords_utm_to_latlon ( (struct UTM *) &(vvp->center), &ll ); | |
571 | a_coords_latlon_to_utm ( &ll, &utm ); | |
572 | if ( utm.zone != vvp->center.utm_zone ) | |
573 | *((struct UTM *)(&vvp->center)) = utm; | |
574 | ||
575 | /* misc. stuff so we don't have to check later */ | |
576 | vvp->utm_zone_width = viewport_utm_zone_width ( vvp ); | |
577 | vvp->one_utm_zone = ( vik_viewport_rightmost_zone(vvp) == vik_viewport_leftmost_zone(vvp) ); | |
578 | } | |
579 | } | |
580 | ||
581 | void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll ) | |
582 | { | |
583 | vik_coord_load_from_latlon ( &(vvp->center), vvp->coord_mode, ll ); | |
584 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
585 | viewport_utm_zone_check ( vvp ); | |
586 | } | |
587 | ||
588 | void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm ) | |
589 | { | |
590 | vik_coord_load_from_utm ( &(vvp->center), vvp->coord_mode, utm ); | |
591 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
592 | viewport_utm_zone_check ( vvp ); | |
593 | } | |
594 | ||
595 | void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord ) | |
596 | { | |
597 | vvp->center = *coord; | |
598 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
599 | viewport_utm_zone_check ( vvp ); | |
600 | } | |
601 | ||
602 | void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br ) | |
603 | { | |
604 | g_return_if_fail ( vvp->coord_mode == VIK_COORD_UTM ); | |
605 | ||
606 | /* get center, then just offset */ | |
607 | vik_viewport_center_for_zonen ( vvp, VIK_UTM(ul), zone ); | |
608 | ul->mode = VIK_COORD_UTM; | |
609 | *br = *ul; | |
610 | ||
611 | ul->north_south += (vvp->ympp * vvp->height / 2); | |
612 | ul->east_west -= (vvp->xmpp * vvp->width / 2); | |
613 | br->north_south -= (vvp->ympp * vvp->height / 2); | |
614 | br->east_west += (vvp->xmpp * vvp->width / 2); | |
615 | } | |
616 | ||
617 | void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone) | |
618 | { | |
619 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
620 | *center = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
621 | center->easting -= ( zone - center->zone ) * vvp->utm_zone_width; | |
622 | center->zone = zone; | |
623 | } | |
624 | } | |
625 | ||
626 | gchar vik_viewport_leftmost_zone ( VikViewport *vvp ) | |
627 | { | |
628 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
629 | VikCoord coord; | |
630 | g_assert ( vvp != NULL ); | |
631 | vik_viewport_screen_to_coord ( vvp, 0, 0, &coord ); | |
632 | return coord.utm_zone; | |
633 | } | |
634 | return '\0'; | |
635 | } | |
636 | ||
637 | gchar vik_viewport_rightmost_zone ( VikViewport *vvp ) | |
638 | { | |
639 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
640 | VikCoord coord; | |
641 | g_assert ( vvp != NULL ); | |
642 | vik_viewport_screen_to_coord ( vvp, vvp->width, 0, &coord ); | |
643 | return coord.utm_zone; | |
644 | } | |
645 | return '\0'; | |
646 | } | |
647 | ||
648 | ||
649 | void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y ) | |
650 | { | |
651 | g_return_if_fail ( vvp != NULL ); | |
652 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
653 | /* slightly optimized */ | |
654 | vvp->center.east_west += vvp->xmpp * (x - (vvp->width/2)); | |
655 | vvp->center.north_south += vvp->ympp * ((vvp->height/2) - y); | |
656 | viewport_utm_zone_check ( vvp ); | |
657 | } else { | |
658 | VikCoord tmp; | |
659 | vik_viewport_screen_to_coord ( vvp, x, y, &tmp ); | |
660 | vik_viewport_set_center_coord ( vvp, &tmp ); | |
661 | } | |
662 | } | |
663 | ||
664 | gint vik_viewport_get_width( VikViewport *vvp ) | |
665 | { | |
666 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
667 | return vvp->width; | |
668 | } | |
669 | ||
670 | gint vik_viewport_get_height( VikViewport *vvp ) | |
671 | { | |
672 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
673 | return vvp->height; | |
674 | } | |
675 | ||
676 | void vik_viewport_screen_to_coord ( VikViewport *vvp, int x, int y, VikCoord *coord ) | |
677 | { | |
678 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
679 | int zone_delta; | |
680 | struct UTM *utm = (struct UTM *) coord; | |
681 | coord->mode = VIK_COORD_UTM; | |
682 | ||
683 | g_return_if_fail ( vvp != NULL ); | |
684 | ||
685 | utm->zone = vvp->center.utm_zone; | |
686 | utm->letter = vvp->center.utm_letter; | |
687 | utm->easting = ( ( x - ( vvp->width / 2) ) * vvp->xmpp ) + vvp->center.east_west; | |
688 | zone_delta = floor( (utm->easting - EASTING_OFFSET ) / vvp->utm_zone_width + 0.5 ); | |
689 | utm->zone += zone_delta; | |
690 | utm->easting -= zone_delta * vvp->utm_zone_width; | |
691 | utm->northing = ( ( ( vvp->height / 2) - y ) * vvp->ympp ) + vvp->center.north_south; | |
692 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
693 | coord->mode = VIK_COORD_LATLON; | |
694 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) | |
695 | 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); | |
fd98b156 | 696 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
50a14534 EB |
697 | /* FIXMERCATOR */ |
698 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
699 | coord->north_south = DEMERCLAT ( MERCLAT(vvp->center.north_south) + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) ); | |
700 | ||
701 | #if 0 | |
702 | --> THIS IS JUNK HERE. | |
703 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
704 | ||
705 | (*y - vvp->height/2) / 256 / 65536 * 180 * vvp->ympp = (MERCLAT(center->lat) - MERCLAT(ll->lat); | |
706 | DML((180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) + ML(cl)) = ll | |
707 | #endif | |
708 | } | |
709 | } | |
710 | } | |
711 | ||
712 | void vik_viewport_coord_to_screen ( VikViewport *vvp, const VikCoord *coord, int *x, int *y ) | |
713 | { | |
714 | static VikCoord tmp; | |
715 | g_return_if_fail ( vvp != NULL ); | |
716 | ||
717 | if ( coord->mode != vvp->coord_mode ) | |
718 | { | |
719 | g_warning ( "Have to convert in vik_viewport_coord_to_screen! This should never happen!"); | |
720 | vik_coord_copy_convert ( coord, vvp->coord_mode, &tmp ); | |
721 | coord = &tmp; | |
722 | } | |
723 | ||
724 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
725 | struct UTM *center = (struct UTM *) &(vvp->center); | |
726 | struct UTM *utm = (struct UTM *) coord; | |
727 | if ( center->zone != utm->zone && vvp->one_utm_zone ) | |
728 | { | |
729 | *x = *y = VIK_VIEWPORT_UTM_WRONG_ZONE; | |
730 | return; | |
731 | } | |
732 | ||
733 | *x = ( (utm->easting - center->easting) / vvp->xmpp ) + (vvp->width / 2) - | |
734 | (center->zone - utm->zone ) * vvp->utm_zone_width / vvp->xmpp; | |
735 | *y = (vvp->height / 2) - ( (utm->northing - center->northing) / vvp->ympp ); | |
736 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
737 | struct LatLon *center = (struct LatLon *) &(vvp->center); | |
738 | struct LatLon *ll = (struct LatLon *) coord; | |
739 | double xx,yy; | |
740 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) { | |
741 | 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 ); | |
742 | *x = xx; *y = yy; | |
50a14534 EB |
743 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
744 | /* FIXMERCATOR: Optimize */ | |
745 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
746 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
747 | } | |
748 | } | |
749 | } | |
750 | ||
d9ffd267 EB |
751 | void a_viewport_clip_line ( gint *x1, gint *y1, gint *x2, gint *y2 ) |
752 | { | |
753 | if ( *x1 > 20000 || *x1 < -20000 ) { | |
754 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
755 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
756 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
757 | } else if ( *y1 > 20000 || *y1 < -20000 ) { | |
758 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
759 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
760 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
761 | } else if ( *x2 > 20000 || *x2 < -20000 ) { | |
762 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
763 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
764 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
37614d9e | 765 | g_print("%f, %d, %d\n", shrinkfactor, *x2, *y2); |
d9ffd267 EB |
766 | } else if ( *y2 > 20000 || *y2 < -20000 ) { |
767 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
768 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
769 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
770 | } | |
771 | } | |
772 | ||
50a14534 EB |
773 | void vik_viewport_draw_line ( VikViewport *vvp, GdkGC *gc, gint x1, gint y1, gint x2, gint y2 ) |
774 | { | |
775 | if ( ! ( ( x1 < 0 && x2 < 0 ) || ( y1 < 0 && y2 < 0 ) || | |
d9ffd267 EB |
776 | ( x1 > vvp->width && x2 > vvp->width ) || ( y1 > vvp->height && y2 > vvp->height ) ) ) { |
777 | /*** clipping, yeah! ***/ | |
778 | a_viewport_clip_line ( &x1, &y1, &x2, &y2 ); | |
779 | gdk_draw_line ( vvp->scr_buffer, gc, x1, y1, x2, y2); | |
780 | } | |
50a14534 EB |
781 | } |
782 | ||
783 | void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 ) | |
784 | { | |
785 | if ( x1 > -10 && x1 < vvp->width + 10 && y1 > -10 && y1 < vvp->height + 10 ) | |
786 | gdk_draw_rectangle ( vvp->scr_buffer, gc, filled, x1, y1, x2, y2); | |
787 | } | |
788 | ||
789 | void vik_viewport_draw_string ( VikViewport *vvp, GdkFont *font, GdkGC *gc, gint x1, gint y1, const gchar *string ) | |
790 | { | |
791 | if ( x1 > -100 && x1 < vvp->width + 100 && y1 > -100 && y1 < vvp->height + 100 ) | |
792 | gdk_draw_string ( vvp->scr_buffer, font, gc, x1, y1, string ); | |
793 | } | |
794 | ||
795 | /* shouldn't use this -- slow -- change the alpha channel instead. */ | |
796 | void vik_viewport_draw_pixbuf_with_alpha ( VikViewport *vvp, GdkPixbuf *pixbuf, gint alpha, | |
797 | gint src_x, gint src_y, gint dest_x, gint dest_y, gint w, gint h ) | |
798 | { | |
799 | gint real_dest_x = MAX(dest_x,0); | |
800 | gint real_dest_y = MAX(dest_y,0); | |
801 | ||
802 | if ( alpha == 0 ) | |
803 | return; /* don't waste your time */ | |
804 | ||
805 | if ( w > vvp->alpha_pixbuf_width || h > vvp->alpha_pixbuf_height ) | |
806 | { | |
807 | if ( vvp->alpha_pixbuf ) | |
808 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
809 | vvp->alpha_pixbuf_width = MAX(w,vvp->alpha_pixbuf_width); | |
810 | vvp->alpha_pixbuf_height = MAX(h,vvp->alpha_pixbuf_height); | |
811 | vvp->alpha_pixbuf = gdk_pixbuf_new ( GDK_COLORSPACE_RGB, FALSE, 8, vvp->alpha_pixbuf_width, vvp->alpha_pixbuf_height ); | |
812 | } | |
813 | ||
814 | w = MIN(w,vvp->width - dest_x); | |
815 | h = MIN(h,vvp->height - dest_y); | |
816 | ||
817 | /* check that we are drawing within boundaries. */ | |
818 | src_x += (real_dest_x - dest_x); | |
819 | src_y += (real_dest_y - dest_y); | |
820 | w -= (real_dest_x - dest_x); | |
821 | h -= (real_dest_y - dest_y); | |
822 | ||
823 | gdk_pixbuf_get_from_drawable ( vvp->alpha_pixbuf, vvp->scr_buffer, NULL, | |
824 | real_dest_x, real_dest_y, 0, 0, w, h ); | |
825 | ||
826 | /* do a composite */ | |
827 | gdk_pixbuf_composite ( pixbuf, vvp->alpha_pixbuf, 0, 0, w, h, -src_x, -src_y, 1, 1, 0, alpha ); | |
828 | ||
829 | /* draw pixbuf_tmp */ | |
830 | vik_viewport_draw_pixbuf ( vvp, vvp->alpha_pixbuf, 0, 0, real_dest_x, real_dest_y, w, h ); | |
831 | } | |
832 | ||
833 | void vik_viewport_draw_pixbuf ( VikViewport *vvp, GdkPixbuf *pixbuf, gint src_x, gint src_y, | |
834 | gint dest_x, gint dest_y, gint w, gint h ) | |
835 | { | |
836 | gdk_draw_pixbuf ( vvp->scr_buffer, | |
837 | // GTK_WIDGET(vvp)->style->black_gc, | |
838 | NULL, | |
839 | pixbuf, | |
840 | src_x, src_y, dest_x, dest_y, w, h, | |
841 | GDK_RGB_DITHER_NONE, 0, 0 ); | |
842 | } | |
843 | ||
844 | void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2 ) | |
845 | { | |
846 | gdk_draw_arc ( vvp->scr_buffer, gc, filled, x, y, width, height, angle1, angle2 ); | |
847 | } | |
848 | ||
849 | ||
850 | void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints ) | |
851 | { | |
852 | gdk_draw_polygon ( vvp->scr_buffer, gc, filled, points, npoints ); | |
853 | } | |
854 | ||
855 | VikCoordMode vik_viewport_get_coord_mode ( const VikViewport *vvp ) | |
856 | { | |
857 | g_assert ( vvp ); | |
858 | return vvp->coord_mode; | |
859 | } | |
860 | ||
861 | static void viewport_set_coord_mode ( VikViewport *vvp, VikCoordMode mode ) | |
862 | { | |
863 | g_return_if_fail ( vvp != NULL ); | |
864 | vvp->coord_mode = mode; | |
865 | vik_coord_convert ( &(vvp->center), mode ); | |
866 | } | |
867 | ||
868 | /* Thanks GPSDrive */ | |
869 | 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 ) | |
870 | { | |
871 | int px, py; | |
872 | gdouble dif, lat, lon; | |
873 | double Ra = Radius[90+(gint)zero_lat]; | |
874 | ||
875 | px = (mapSizeX2 - x) * pixelfact_x; | |
876 | py = (-mapSizeY2 + y) * pixelfact_y; | |
877 | ||
878 | lat = zero_lat - py / Ra; | |
879 | lat = zero_lat - py / Ra; | |
880 | lon = | |
881 | zero_long - | |
882 | px / (Ra * | |
883 | cos (lat * DEG2RAD)); | |
884 | ||
885 | dif = lat * (1 - (cos ((fabs (lon - zero_long)) * DEG2RAD))); | |
886 | lat = lat - dif / 1.5; | |
887 | lon = | |
888 | zero_long - | |
889 | px / (Ra * | |
890 | cos (lat * DEG2RAD)); | |
891 | ||
892 | *lt = lat; | |
893 | *lg = lon; | |
894 | return (TRUE); | |
895 | } | |
896 | ||
897 | /* Thanks GPSDrive */ | |
898 | 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 ) | |
899 | { | |
900 | double dif; | |
901 | double Ra; | |
902 | gint mapSizeX = 2 * mapSizeX2; | |
903 | gint mapSizeY = 2 * mapSizeY2; | |
904 | ||
905 | g_assert ( lt >= -90.0 && lt <= 90.0 ); | |
906 | // lg *= rad2deg; // FIXME, optimize equations | |
907 | // lt *= rad2deg; | |
908 | Ra = Radius[90+(gint)lt]; | |
909 | *x = Ra * | |
910 | cos (lt*DEG2RAD) * (lg - zero_long); | |
911 | *y = Ra * (lt - zero_lat); | |
912 | dif = Ra * RAD2DEG * (1 - (cos ((DEG2RAD * (lg - zero_long))))); | |
913 | *y = *y + dif / 1.85; | |
914 | *x = *x / pixelfact_x; | |
915 | *y = *y / pixelfact_y; | |
916 | *x = mapSizeX2 - *x; | |
917 | *y += mapSizeY2; | |
918 | if ((*x < 0)||(*x >= mapSizeX)||(*y < 0)||(*y >= mapSizeY)) | |
919 | return (FALSE); | |
920 | return (TRUE); | |
921 | } | |
922 | ||
923 | static void viewport_init_ra() | |
924 | { | |
925 | static gboolean done_before = FALSE; | |
926 | if ( !done_before ) | |
927 | { | |
928 | gint i; | |
929 | for ( i = -90; i <= 90; i++) | |
930 | Radius[i+90] = calcR ( (double)i ) * DEG2RAD; | |
931 | done_before = TRUE; | |
932 | } | |
933 | } | |
934 | ||
935 | double calcR (double lat) | |
936 | { | |
937 | double a = 6378.137, r, sc, x, y, z; | |
938 | double e2 = 0.081082 * 0.081082; | |
939 | /* | |
940 | * the radius of curvature of an ellipsoidal Earth in the plane of the | |
941 | * meridian is given by | |
942 | * | |
943 | * R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2) | |
944 | * | |
945 | * | |
946 | * where a is the equatorial radius, b is the polar radius, and e is | |
947 | * the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2) | |
948 | * | |
949 | * a = 6378 km (3963 mi) Equatorial radius (surface to center distance) | |
950 | * b = 6356.752 km (3950 mi) Polar radius (surface to center distance) e | |
951 | * = 0.081082 Eccentricity | |
952 | */ | |
953 | ||
954 | lat = lat * DEG2RAD; | |
955 | sc = sin (lat); | |
956 | x = a * (1.0 - e2); | |
957 | z = 1.0 - e2 * sc * sc; | |
958 | y = pow (z, 1.5); | |
959 | r = x / y; | |
960 | r = r * 1000.0; | |
961 | return r; | |
962 | } | |
963 | ||
964 | gboolean vik_viewport_is_one_zone ( VikViewport *vvp ) | |
965 | { | |
966 | return vvp->coord_mode == VIK_COORD_UTM && vvp->one_utm_zone; | |
967 | } | |
968 | ||
969 | void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout ) | |
970 | { | |
971 | if ( x > -100 && x < vvp->width + 100 && y > -100 && y < vvp->height + 100 ) | |
972 | gdk_draw_layout ( vvp->scr_buffer, gc, x, y, layout ); | |
973 | } | |
974 | ||
975 | void vik_gc_get_fg_color ( GdkGC *gc, GdkColor *dest ) | |
976 | { | |
977 | static GdkGCValues values; | |
978 | gdk_gc_get_values ( gc, &values ); | |
979 | gdk_colormap_query_color ( gdk_colormap_get_system(), values.foreground.pixel, dest ); | |
980 | } | |
981 | ||
982 | GdkFunction vik_gc_get_function ( GdkGC *gc ) | |
983 | { | |
984 | static GdkGCValues values; | |
985 | gdk_gc_get_values ( gc, &values ); | |
986 | return values.function; | |
987 | } | |
988 | ||
989 | void vik_viewport_set_drawmode ( VikViewport *vvp, VikViewportDrawMode drawmode ) | |
990 | { | |
991 | vvp->drawmode = drawmode; | |
992 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
993 | viewport_set_coord_mode ( vvp, VIK_COORD_UTM ); | |
994 | else { | |
995 | viewport_set_coord_mode ( vvp, VIK_COORD_LATLON ); | |
50a14534 EB |
996 | } |
997 | } | |
998 | ||
999 | VikViewportDrawMode vik_viewport_get_drawmode ( VikViewport *vvp ) | |
1000 | { | |
1001 | return vvp->drawmode; | |
1002 | } | |
1003 | ||
0df66d57 EB |
1004 | /******** triggering *******/ |
1005 | void vik_viewport_set_trigger ( VikViewport *vp, gpointer trigger ) | |
1006 | { | |
1007 | vp->trigger = trigger; | |
1008 | } | |
1009 | ||
1010 | gpointer vik_viewport_get_trigger ( VikViewport *vp ) | |
1011 | { | |
1012 | return vp->trigger; | |
1013 | } | |
1014 | ||
1015 | void vik_viewport_snapshot_save ( VikViewport *vp ) | |
1016 | { | |
1017 | gdk_draw_drawable ( vp->snapshot_buffer, vp->background_gc, vp->scr_buffer, 0, 0, 0, 0, -1, -1 ); | |
1018 | } | |
1019 | ||
1020 | void vik_viewport_snapshot_load ( VikViewport *vp ) | |
1021 | { | |
1022 | gdk_draw_drawable ( vp->scr_buffer, vp->background_gc, vp->snapshot_buffer, 0, 0, 0, 0, -1, -1 ); | |
1023 | } | |
1024 | ||
1025 | void vik_viewport_set_half_drawn(VikViewport *vp, gboolean half_drawn) | |
1026 | { | |
1027 | vp->half_drawn = half_drawn; | |
1028 | } | |
1029 | ||
1030 | gboolean vik_viewport_get_half_drawn( VikViewport *vp ) | |
1031 | { | |
1032 | return vp->half_drawn; | |
1033 | } | |
1034 | ||
7bc965c0 GB |
1035 | |
1036 | const gchar *vik_viewport_get_drawmode_name(VikViewport *vv, VikViewportDrawMode mode) | |
0c1044e9 | 1037 | { |
7bc965c0 | 1038 | const gchar *name = NULL; |
24277274 | 1039 | VikWindow *vw = NULL; |
7bc965c0 GB |
1040 | GtkWidget *mode_button; |
1041 | GtkWidget *label; | |
24277274 GB |
1042 | |
1043 | vw = VIK_WINDOW_FROM_WIDGET(vv); | |
1044 | mode_button = vik_window_get_drawmode_button(vw, mode); | |
7bc965c0 GB |
1045 | label = gtk_bin_get_child(GTK_BIN(mode_button)); |
1046 | ||
1047 | name = gtk_label_get_text ( GTK_LABEL(label) ); | |
314c1ccc | 1048 | |
7bc965c0 | 1049 | return name; |
314c1ccc QT |
1050 | |
1051 | } | |
7bc965c0 | 1052 | |
0c1044e9 EB |
1053 | void vik_viewport_get_min_max_lat_lon ( VikViewport *vp, gdouble *min_lat, gdouble *max_lat, gdouble *min_lon, gdouble *max_lon ) |
1054 | { | |
1055 | VikCoord tleft, tright, bleft, bright; | |
1056 | ||
1057 | vik_viewport_screen_to_coord ( vp, 0, 0, &tleft ); | |
1058 | vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright ); | |
1059 | vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft ); | |
1060 | vik_viewport_screen_to_coord ( vp, vp->width, vp->height, &bright ); | |
7bc965c0 | 1061 | |
0c1044e9 EB |
1062 | vik_coord_convert(&tleft, VIK_COORD_LATLON); |
1063 | vik_coord_convert(&tright, VIK_COORD_LATLON); | |
1064 | vik_coord_convert(&bleft, VIK_COORD_LATLON); | |
1065 | vik_coord_convert(&bright, VIK_COORD_LATLON); | |
1066 | ||
1067 | *max_lat = MAX(tleft.north_south, tright.north_south); | |
1068 | *min_lat = MIN(bleft.north_south, bright.north_south); | |
1069 | *max_lon = MAX(tright.east_west, bright.east_west); | |
1070 | *min_lon = MIN(tleft.east_west, bleft.east_west); | |
1071 | } |