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50a14534 EB |
1 | /* |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
a482007a | 4 | * Copyright (C) 2003-2007, Evan Battaglia <gtoevan@gmx.net> |
50a14534 EB |
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" | |
480fb7e1 RN |
31 | #define DEFAULT_HIGHLIGHT_COLOR "#EEA500" |
32 | /* Default highlight in orange */ | |
50a14534 EB |
33 | |
34 | #include <gtk/gtk.h> | |
8c00358d | 35 | #ifdef HAVE_MATH_H |
50a14534 | 36 | #include <math.h> |
8c00358d | 37 | #endif |
82aa018d GB |
38 | #ifdef HAVE_STRING_H |
39 | #include <string.h> | |
40 | #endif | |
50a14534 EB |
41 | |
42 | #include "coords.h" | |
43 | #include "vikcoord.h" | |
a59e6eb9 | 44 | #include "vikwindow.h" |
50a14534 EB |
45 | #include "vikviewport.h" |
46 | ||
47 | #include "mapcoord.h" | |
48 | ||
49 | /* for ALTI_TO_MPP */ | |
50 | #include "globals.h" | |
50a14534 EB |
51 | |
52 | static gdouble EASTING_OFFSET = 500000.0; | |
53 | ||
26336cf0 GB |
54 | static gint PAD = 10; |
55 | ||
50a14534 EB |
56 | static void viewport_finalize ( GObject *gob ); |
57 | static void viewport_utm_zone_check ( VikViewport *vvp ); | |
58 | ||
59 | 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 ); | |
60 | 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 ); | |
61 | double calcR (double lat); | |
62 | ||
63 | static double Radius[181]; | |
64 | static void viewport_init_ra(); | |
65 | ||
66 | static GObjectClass *parent_class; | |
67 | ||
50a14534 EB |
68 | |
69 | struct _VikViewport { | |
70 | GtkDrawingArea drawing_area; | |
71 | GdkPixmap *scr_buffer; | |
72 | gint width, height; | |
73 | VikCoord center; | |
74 | VikCoordMode coord_mode; | |
75 | gdouble xmpp, ympp; | |
76 | ||
77 | GdkPixbuf *alpha_pixbuf; | |
78 | guint8 alpha_pixbuf_width; | |
79 | guint8 alpha_pixbuf_height; | |
80 | ||
81 | gdouble utm_zone_width; | |
82 | gboolean one_utm_zone; | |
83 | ||
84 | GdkGC *background_gc; | |
85 | GdkColor background_color; | |
4e485bf3 | 86 | GdkGC *scale_bg_gc; |
82aa018d GB |
87 | |
88 | GSList *copyrights; | |
26336cf0 | 89 | GSList *logos; |
82aa018d GB |
90 | |
91 | /* Wether or not display OSD info */ | |
35c7c0ba | 92 | gboolean draw_scale; |
c933487f | 93 | gboolean draw_centermark; |
2afcef36 | 94 | gboolean draw_highlight; |
480fb7e1 RN |
95 | GdkGC *highlight_gc; |
96 | GdkColor highlight_color; | |
50a14534 EB |
97 | |
98 | /* subset of coord types. lat lon can be plotted in 2 ways, google or exp. */ | |
99 | VikViewportDrawMode drawmode; | |
100 | ||
0df66d57 EB |
101 | /* trigger stuff */ |
102 | gpointer trigger; | |
103 | GdkPixmap *snapshot_buffer; | |
104 | gboolean half_drawn; | |
50a14534 EB |
105 | }; |
106 | ||
107 | static gdouble | |
108 | viewport_utm_zone_width ( VikViewport *vvp ) | |
109 | { | |
110 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
111 | struct LatLon ll; | |
112 | ||
113 | /* get latitude of screen bottom */ | |
114 | struct UTM utm = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
115 | utm.northing -= vvp -> height * vvp -> ympp / 2; | |
116 | a_coords_utm_to_latlon ( &utm, &ll ); | |
117 | ||
118 | /* boundary */ | |
119 | ll.lon = (utm.zone - 1) * 6 - 180 ; | |
120 | a_coords_latlon_to_utm ( &ll, &utm); | |
121 | return fabs ( utm.easting - EASTING_OFFSET ) * 2; | |
122 | } else | |
123 | return 0.0; | |
124 | } | |
125 | ||
eb560cd6 | 126 | G_DEFINE_TYPE (VikViewport, vik_viewport, GTK_TYPE_DRAWING_AREA) |
50a14534 | 127 | |
eb560cd6 GB |
128 | static void |
129 | vik_viewport_class_init ( VikViewportClass *klass ) | |
50a14534 EB |
130 | { |
131 | /* Destructor */ | |
132 | GObjectClass *object_class; | |
133 | ||
134 | object_class = G_OBJECT_CLASS (klass); | |
135 | ||
136 | object_class->finalize = viewport_finalize; | |
137 | ||
138 | parent_class = g_type_class_peek_parent (klass); | |
139 | } | |
140 | ||
24277274 | 141 | VikViewport *vik_viewport_new () |
50a14534 | 142 | { |
a59e6eb9 | 143 | VikViewport *vv = VIK_VIEWPORT ( g_object_new ( VIK_VIEWPORT_TYPE, NULL ) ); |
a59e6eb9 | 144 | return vv; |
50a14534 EB |
145 | } |
146 | ||
eb560cd6 GB |
147 | static void |
148 | vik_viewport_init ( VikViewport *vvp ) | |
50a14534 EB |
149 | { |
150 | viewport_init_ra(); | |
151 | ||
5210c3d3 GB |
152 | struct UTM utm; |
153 | struct LatLon ll; | |
154 | ll.lat = a_vik_get_default_lat(); | |
155 | ll.lon = a_vik_get_default_long(); | |
156 | a_coords_latlon_to_utm ( &ll, &utm ); | |
157 | ||
50a14534 EB |
158 | /* TODO: not static */ |
159 | vvp->xmpp = 4.0; | |
160 | vvp->ympp = 4.0; | |
6a9ff0ee QT |
161 | vvp->coord_mode = VIK_COORD_LATLON; |
162 | vvp->drawmode = VIK_VIEWPORT_DRAWMODE_MERCATOR; | |
ee180665 | 163 | vvp->center.mode = VIK_COORD_LATLON; |
5210c3d3 GB |
164 | vvp->center.north_south = ll.lat; |
165 | vvp->center.east_west = ll.lon; | |
166 | vvp->center.utm_zone = (int)utm.zone; | |
167 | vvp->center.utm_letter = utm.letter; | |
50a14534 EB |
168 | vvp->scr_buffer = NULL; |
169 | vvp->alpha_pixbuf = NULL; | |
170 | vvp->alpha_pixbuf_width = vvp->alpha_pixbuf_height = 0; | |
171 | vvp->utm_zone_width = 0.0; | |
172 | vvp->background_gc = NULL; | |
480fb7e1 | 173 | vvp->highlight_gc = NULL; |
4e485bf3 | 174 | vvp->scale_bg_gc = NULL; |
82aa018d GB |
175 | |
176 | vvp->copyrights = NULL; | |
177 | ||
35c7c0ba | 178 | vvp->draw_scale = TRUE; |
c933487f | 179 | vvp->draw_centermark = TRUE; |
2afcef36 | 180 | vvp->draw_highlight = TRUE; |
0df66d57 EB |
181 | |
182 | vvp->trigger = NULL; | |
183 | vvp->snapshot_buffer = NULL; | |
184 | vvp->half_drawn = FALSE; | |
185 | ||
50a14534 | 186 | g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL); |
165d30aa EB |
187 | |
188 | GTK_WIDGET_SET_FLAGS(vvp, GTK_CAN_FOCUS); /* allow VVP to have focus -- enabling key events, etc */ | |
50a14534 EB |
189 | } |
190 | ||
191 | GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp ) | |
192 | { | |
193 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
194 | *rv = vvp->background_color; | |
195 | return rv; | |
196 | } | |
197 | ||
198 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
199 | const gchar *vik_viewport_get_background_color ( VikViewport *vvp ) | |
200 | { | |
201 | static gchar color[8]; | |
202 | 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)); | |
203 | return color; | |
204 | } | |
205 | ||
206 | void vik_viewport_set_background_color ( VikViewport *vvp, const gchar *colorname ) | |
207 | { | |
52aa15a7 | 208 | g_assert ( vvp && vvp->background_gc ); |
b244bc6a GB |
209 | if ( gdk_color_parse ( colorname, &(vvp->background_color) ) ) |
210 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, &(vvp->background_color) ); | |
211 | else | |
212 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
213 | } |
214 | ||
215 | void vik_viewport_set_background_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
216 | { | |
52aa15a7 | 217 | g_assert ( vvp && vvp->background_gc ); |
50a14534 EB |
218 | vvp->background_color = *color; |
219 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, color ); | |
220 | } | |
221 | ||
480fb7e1 RN |
222 | GdkColor *vik_viewport_get_highlight_gdkcolor ( VikViewport *vvp ) |
223 | { | |
224 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
225 | *rv = vvp->highlight_color; | |
226 | return rv; | |
227 | } | |
228 | ||
229 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
230 | const gchar *vik_viewport_get_highlight_color ( VikViewport *vvp ) | |
231 | { | |
232 | static gchar color[8]; | |
233 | g_snprintf(color, sizeof(color), "#%.2x%.2x%.2x", (int)(vvp->highlight_color.red/256),(int)(vvp->highlight_color.green/256),(int)(vvp->highlight_color.blue/256)); | |
234 | return color; | |
235 | } | |
236 | ||
237 | void vik_viewport_set_highlight_color ( VikViewport *vvp, const gchar *colorname ) | |
238 | { | |
239 | g_assert ( vvp->highlight_gc ); | |
240 | gdk_color_parse ( colorname, &(vvp->highlight_color) ); | |
241 | gdk_gc_set_rgb_fg_color ( vvp->highlight_gc, &(vvp->highlight_color) ); | |
242 | } | |
243 | ||
244 | void vik_viewport_set_highlight_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
245 | { | |
246 | g_assert ( vvp->highlight_gc ); | |
247 | vvp->highlight_color = *color; | |
248 | gdk_gc_set_rgb_fg_color ( vvp->highlight_gc, color ); | |
249 | } | |
250 | ||
251 | GdkGC *vik_viewport_get_gc_highlight ( VikViewport *vvp ) | |
252 | { | |
253 | return vvp->highlight_gc; | |
254 | } | |
50a14534 | 255 | |
04f36d92 RN |
256 | void vik_viewport_set_highlight_thickness ( VikViewport *vvp, gint thickness ) |
257 | { | |
258 | // Otherwise same GDK_* attributes as in vik_viewport_new_gc | |
259 | gdk_gc_set_line_attributes ( vvp->highlight_gc, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
260 | } | |
261 | ||
50a14534 EB |
262 | GdkGC *vik_viewport_new_gc ( VikViewport *vvp, const gchar *colorname, gint thickness ) |
263 | { | |
b244bc6a | 264 | GdkGC *rv = NULL; |
50a14534 EB |
265 | GdkColor color; |
266 | ||
267 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
b244bc6a GB |
268 | if ( gdk_color_parse ( colorname, &color ) ) |
269 | gdk_gc_set_rgb_fg_color ( rv, &color ); | |
270 | else | |
271 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
272 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); |
273 | return rv; | |
274 | } | |
275 | ||
276 | GdkGC *vik_viewport_new_gc_from_color ( VikViewport *vvp, GdkColor *color, gint thickness ) | |
277 | { | |
278 | GdkGC *rv; | |
279 | ||
280 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
281 | gdk_gc_set_rgb_fg_color ( rv, color ); | |
282 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
283 | return rv; | |
284 | } | |
285 | ||
286 | void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint height ) | |
287 | { | |
288 | vvp->width = width; | |
289 | vvp->height = height; | |
290 | if ( vvp->scr_buffer ) | |
291 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
292 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
0df66d57 EB |
293 | |
294 | /* TODO trigger: only if this is enabled !!! */ | |
295 | if ( vvp->snapshot_buffer ) | |
296 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
297 | vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
50a14534 EB |
298 | } |
299 | ||
300 | ||
301 | GdkPixmap *vik_viewport_get_pixmap ( VikViewport *vvp ) | |
302 | { | |
303 | return vvp->scr_buffer; | |
304 | } | |
305 | ||
306 | gboolean vik_viewport_configure ( VikViewport *vvp ) | |
307 | { | |
308 | g_return_val_if_fail ( vvp != NULL, TRUE ); | |
309 | ||
310 | vvp->width = GTK_WIDGET(vvp)->allocation.width; | |
311 | vvp->height = GTK_WIDGET(vvp)->allocation.height; | |
312 | ||
313 | if ( vvp->scr_buffer ) | |
314 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
315 | ||
316 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
317 | ||
0df66d57 EB |
318 | /* TODO trigger: only if enabled! */ |
319 | if ( vvp->snapshot_buffer ) | |
320 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
321 | ||
322 | vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
323 | /* TODO trigger */ | |
324 | ||
50a14534 | 325 | /* this is down here so it can get a GC (necessary?) */ |
e8e82387 | 326 | if ( !vvp->background_gc ) |
50a14534 | 327 | { |
348e8666 | 328 | vvp->background_gc = vik_viewport_new_gc ( vvp, DEFAULT_BACKGROUND_COLOR, 1 ); |
e8e82387 | 329 | vik_viewport_set_background_color ( vvp, DEFAULT_BACKGROUND_COLOR ); |
50a14534 | 330 | } |
480fb7e1 RN |
331 | if ( ! vvp->highlight_gc ) |
332 | { | |
333 | vvp->highlight_gc = vik_viewport_new_gc ( vvp, DEFAULT_HIGHLIGHT_COLOR, 1 ); | |
334 | vik_viewport_set_highlight_color ( vvp, DEFAULT_HIGHLIGHT_COLOR ); | |
335 | } | |
4e485bf3 QT |
336 | if ( !vvp->scale_bg_gc) { |
337 | vvp->scale_bg_gc = vik_viewport_new_gc(vvp, "grey", 3); | |
338 | } | |
50a14534 EB |
339 | |
340 | return FALSE; | |
341 | } | |
342 | ||
343 | static void viewport_finalize ( GObject *gob ) | |
344 | { | |
345 | VikViewport *vvp = VIK_VIEWPORT(gob); | |
346 | ||
347 | g_return_if_fail ( vvp != NULL ); | |
348 | ||
349 | if ( vvp->scr_buffer ) | |
350 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
351 | ||
0df66d57 EB |
352 | if ( vvp->snapshot_buffer ) |
353 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
354 | ||
50a14534 EB |
355 | if ( vvp->alpha_pixbuf ) |
356 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
357 | ||
358 | if ( vvp->background_gc ) | |
359 | g_object_unref ( G_OBJECT ( vvp->background_gc ) ); | |
360 | ||
480fb7e1 RN |
361 | if ( vvp->highlight_gc ) |
362 | g_object_unref ( G_OBJECT ( vvp->highlight_gc ) ); | |
363 | ||
4e485bf3 QT |
364 | if ( vvp->scale_bg_gc ) { |
365 | g_object_unref ( G_OBJECT ( vvp->scale_bg_gc ) ); | |
366 | vvp->scale_bg_gc = NULL; | |
367 | } | |
368 | ||
50a14534 EB |
369 | G_OBJECT_CLASS(parent_class)->finalize(gob); |
370 | } | |
371 | ||
33e0e500 GB |
372 | /** |
373 | * vik_viewport_clear: | |
374 | * @vvp: self object | |
375 | * | |
376 | * Clear the whole viewport. | |
377 | */ | |
50a14534 EB |
378 | void vik_viewport_clear ( VikViewport *vvp ) |
379 | { | |
380 | g_return_if_fail ( vvp != NULL ); | |
381 | gdk_draw_rectangle(GDK_DRAWABLE(vvp->scr_buffer), vvp->background_gc, TRUE, 0, 0, vvp->width, vvp->height); | |
82aa018d | 382 | vik_viewport_reset_copyrights ( vvp ); |
26336cf0 | 383 | vik_viewport_reset_logos ( vvp ); |
50a14534 EB |
384 | } |
385 | ||
33e0e500 GB |
386 | /** |
387 | * vik_viewport_set_draw_scale: | |
388 | * @vvp: self | |
389 | * @draw_scale: new value | |
390 | * | |
391 | * Enable/Disable display of scale. | |
392 | */ | |
35c7c0ba EB |
393 | void vik_viewport_set_draw_scale ( VikViewport *vvp, gboolean draw_scale ) |
394 | { | |
395 | vvp->draw_scale = draw_scale; | |
396 | } | |
397 | ||
398 | gboolean vik_viewport_get_draw_scale ( VikViewport *vvp ) | |
399 | { | |
400 | return vvp->draw_scale; | |
401 | } | |
402 | ||
acaf7113 AF |
403 | void vik_viewport_draw_scale ( VikViewport *vvp ) |
404 | { | |
c53eda9a GB |
405 | g_return_if_fail ( vvp != NULL ); |
406 | ||
35c7c0ba EB |
407 | if ( vvp->draw_scale ) { |
408 | VikCoord left, right; | |
409 | gdouble unit, base, diff, old_unit, old_diff, ratio; | |
26336cf0 | 410 | gint odd, len, SCSIZE = 5, HEIGHT=10; |
35c7c0ba EB |
411 | PangoLayout *pl; |
412 | gchar s[128]; | |
acaf7113 | 413 | |
35c7c0ba EB |
414 | vik_viewport_screen_to_coord ( vvp, 0, vvp->height, &left ); |
415 | vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height, &right ); | |
acaf7113 | 416 | |
6f9336aa RN |
417 | vik_units_distance_t dist_units = a_vik_get_units_distance (); |
418 | switch (dist_units) { | |
419 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
420 | base = vik_coord_diff ( &left, &right ); // in meters | |
421 | break; | |
422 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a | 423 | // in 0.1 miles (copes better when zoomed in as 1 mile can be too big) |
433b3f7f | 424 | base = VIK_METERS_TO_MILES(vik_coord_diff ( &left, &right )) * 10.0; |
6f9336aa RN |
425 | break; |
426 | default: | |
427 | base = 1; // Keep the compiler happy | |
428 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
429 | } | |
35c7c0ba | 430 | ratio = (vvp->width/SCSIZE)/base; |
acaf7113 | 431 | |
35c7c0ba EB |
432 | unit = 1; |
433 | diff = fabs(base-unit); | |
acaf7113 AF |
434 | old_unit = unit; |
435 | old_diff = diff; | |
35c7c0ba EB |
436 | odd = 1; |
437 | while (diff <= old_diff) { | |
438 | old_unit = unit; | |
439 | old_diff = diff; | |
440 | unit = unit * (odd%2 ? 5 : 2); | |
441 | diff = fabs(base-unit); | |
442 | odd++; | |
443 | } | |
444 | unit = old_unit; | |
445 | len = unit * ratio; | |
acaf7113 | 446 | |
4e485bf3 QT |
447 | /* white background */ |
448 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
449 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); | |
450 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
451 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); | |
452 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
453 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); | |
454 | /* black scale */ | |
ff37db21 | 455 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 456 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); |
ff37db21 | 457 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 458 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); |
ff37db21 | 459 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 460 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); |
35c7c0ba EB |
461 | if (odd%2) { |
462 | int i; | |
463 | for (i=1; i<5; i++) { | |
4e485bf3 QT |
464 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
465 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
ff37db21 | 466 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 467 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
35c7c0ba EB |
468 | } |
469 | } else { | |
470 | int i; | |
471 | for (i=1; i<10; i++) { | |
4e485bf3 QT |
472 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
473 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
ff37db21 | 474 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
35c7c0ba EB |
475 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
476 | } | |
acaf7113 | 477 | } |
35c7c0ba | 478 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); |
ff37db21 | 479 | pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc); |
35c7c0ba | 480 | |
6f9336aa RN |
481 | switch (dist_units) { |
482 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
483 | if (unit >= 1000) { | |
484 | sprintf(s, "%d km", (int)unit/1000); | |
485 | } else { | |
486 | sprintf(s, "%d m", (int)unit); | |
487 | } | |
488 | break; | |
489 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a RN |
490 | // Handle units in 0.1 miles |
491 | if (unit < 10.0) { | |
492 | sprintf(s, "%0.1f miles", unit/10.0); | |
493 | } | |
494 | else if ((int)unit == 10.0) { | |
495 | sprintf(s, "1 mile"); | |
6f9336aa RN |
496 | } |
497 | else { | |
8d772d8a | 498 | sprintf(s, "%d miles", (int)(unit/10.0)); |
6f9336aa RN |
499 | } |
500 | break; | |
501 | default: | |
502 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
acaf7113 | 503 | } |
35c7c0ba | 504 | pango_layout_set_text(pl, s, -1); |
ff37db21 | 505 | vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 506 | PAD + len + PAD, vvp->height - PAD - 10, pl); |
6278ccc6 | 507 | g_object_unref(pl); |
e6869c62 | 508 | pl = NULL; |
35c7c0ba | 509 | } |
acaf7113 AF |
510 | } |
511 | ||
82aa018d GB |
512 | void vik_viewport_draw_copyright ( VikViewport *vvp ) |
513 | { | |
514 | g_return_if_fail ( vvp != NULL ); | |
515 | ||
82aa018d GB |
516 | PangoLayout *pl; |
517 | PangoRectangle ink_rect, logical_rect; | |
518 | gchar s[128] = ""; | |
519 | ||
520 | /* compute copyrights string */ | |
521 | guint len = g_slist_length ( vvp->copyrights ); | |
15a0bd14 | 522 | |
82aa018d GB |
523 | int i; |
524 | for (i = 0 ; i < len ; i++) | |
525 | { | |
15a0bd14 RN |
526 | // Stop when buffer is full |
527 | int slen = strlen ( s ); | |
528 | if ( slen >= 127 ) | |
529 | break; | |
530 | ||
82aa018d | 531 | gchar *copyright = g_slist_nth_data ( vvp->copyrights, i ); |
15a0bd14 RN |
532 | |
533 | // Only use part of this copyright that fits in the available space left | |
534 | // remembering 1 character is left available for the appended space | |
535 | int clen = strlen ( copyright ); | |
536 | if ( slen + clen > 126 ) { | |
537 | clen = 126 - slen; | |
538 | } | |
539 | ||
540 | strncat ( s, copyright, clen ); | |
82aa018d GB |
541 | strcat ( s, " " ); |
542 | } | |
543 | ||
544 | /* create pango layout */ | |
545 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); | |
ff37db21 | 546 | pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc); |
82aa018d GB |
547 | pango_layout_set_alignment ( pl, PANGO_ALIGN_RIGHT ); |
548 | ||
549 | /* Set the text */ | |
550 | pango_layout_set_text(pl, s, -1); | |
551 | ||
552 | /* Use maximum of half the viewport width */ | |
56cb1807 | 553 | pango_layout_set_width ( pl, ( vvp->width / 2 ) * PANGO_SCALE ); |
82aa018d | 554 | pango_layout_get_pixel_extents(pl, &ink_rect, &logical_rect); |
ff37db21 | 555 | vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
56cb1807 | 556 | vvp->width / 2, vvp->height - logical_rect.height, pl); |
82aa018d GB |
557 | |
558 | /* Free memory */ | |
559 | g_object_unref(pl); | |
560 | pl = NULL; | |
561 | } | |
562 | ||
33e0e500 GB |
563 | /** |
564 | * vik_viewport_set_draw_centermark: | |
565 | * @vvp: self object | |
566 | * @draw_centermark: new value | |
567 | * | |
568 | * Enable/Disable display of center mark. | |
569 | */ | |
c933487f QT |
570 | void vik_viewport_set_draw_centermark ( VikViewport *vvp, gboolean draw_centermark ) |
571 | { | |
572 | vvp->draw_centermark = draw_centermark; | |
573 | } | |
574 | ||
575 | gboolean vik_viewport_get_draw_centermark ( VikViewport *vvp ) | |
576 | { | |
577 | return vvp->draw_centermark; | |
578 | } | |
579 | ||
580 | void vik_viewport_draw_centermark ( VikViewport *vvp ) | |
581 | { | |
c53eda9a GB |
582 | g_return_if_fail ( vvp != NULL ); |
583 | ||
c933487f QT |
584 | if ( !vvp->draw_centermark ) |
585 | return; | |
586 | ||
3df69a6b QT |
587 | const int len = 30; |
588 | const int gap = 4; | |
c933487f QT |
589 | int center_x = vvp->width/2; |
590 | int center_y = vvp->height/2; | |
ff37db21 | 591 | GdkGC * black_gc = gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc; |
c933487f QT |
592 | |
593 | /* white back ground */ | |
3df69a6b QT |
594 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x - len, center_y, center_x - gap, center_y); |
595 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x + gap, center_y, center_x + len, center_y); | |
596 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y - len, center_x, center_y - gap); | |
597 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f | 598 | /* black fore ground */ |
3df69a6b QT |
599 | vik_viewport_draw_line(vvp, black_gc, center_x - len, center_y, center_x - gap, center_y); |
600 | vik_viewport_draw_line(vvp, black_gc, center_x + gap, center_y, center_x + len, center_y); | |
601 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y - len, center_x, center_y - gap); | |
602 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f QT |
603 | |
604 | } | |
605 | ||
26336cf0 GB |
606 | void vik_viewport_draw_logo ( VikViewport *vvp ) |
607 | { | |
608 | g_return_if_fail ( vvp != NULL ); | |
609 | ||
26336cf0 GB |
610 | guint len = g_slist_length ( vvp->logos ); |
611 | gint x = vvp->width - PAD; | |
612 | gint y = PAD; | |
613 | int i; | |
614 | for (i = 0 ; i < len ; i++) | |
615 | { | |
616 | GdkPixbuf *logo = g_slist_nth_data ( vvp->logos, i ); | |
617 | gint width = gdk_pixbuf_get_width ( logo ); | |
618 | gint height = gdk_pixbuf_get_height ( logo ); | |
619 | vik_viewport_draw_pixbuf ( vvp, logo, 0, 0, x - width, y, width, height ); | |
620 | x = x - width - PAD; | |
621 | } | |
2afcef36 | 622 | } |
26336cf0 | 623 | |
2afcef36 RN |
624 | void vik_viewport_set_draw_highlight ( VikViewport *vvp, gboolean draw_highlight ) |
625 | { | |
626 | vvp->draw_highlight = draw_highlight; | |
627 | } | |
628 | ||
629 | gboolean vik_viewport_get_draw_highlight ( VikViewport *vvp ) | |
630 | { | |
631 | return vvp->draw_highlight; | |
26336cf0 GB |
632 | } |
633 | ||
50a14534 EB |
634 | void vik_viewport_sync ( VikViewport *vvp ) |
635 | { | |
636 | g_return_if_fail ( vvp != NULL ); | |
ff37db21 | 637 | gdk_draw_drawable(GTK_WIDGET(vvp)->window, gtk_widget_get_style(GTK_WIDGET(vvp))->bg_gc[0], GDK_DRAWABLE(vvp->scr_buffer), 0, 0, 0, 0, vvp->width, vvp->height); |
50a14534 EB |
638 | } |
639 | ||
640 | void vik_viewport_pan_sync ( VikViewport *vvp, gint x_off, gint y_off ) | |
641 | { | |
acaf7113 AF |
642 | gint x, y, wid, hei; |
643 | ||
50a14534 | 644 | g_return_if_fail ( vvp != NULL ); |
ff37db21 | 645 | gdk_draw_drawable(GTK_WIDGET(vvp)->window, gtk_widget_get_style(GTK_WIDGET(vvp))->bg_gc[0], GDK_DRAWABLE(vvp->scr_buffer), 0, 0, x_off, y_off, vvp->width, vvp->height); |
acaf7113 AF |
646 | |
647 | if (x_off >= 0) { | |
648 | x = 0; | |
649 | wid = x_off; | |
650 | } else { | |
651 | x = vvp->width+x_off; | |
652 | wid = -x_off; | |
653 | } | |
654 | if (y_off >= 0) { | |
655 | y = 0; | |
656 | hei = y_off; | |
657 | } else { | |
658 | y = vvp->height+y_off; | |
659 | hei = -y_off; | |
660 | } | |
661 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), x, 0, wid, vvp->height); | |
662 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), 0, y, vvp->width, hei); | |
50a14534 EB |
663 | } |
664 | ||
665 | void vik_viewport_set_zoom ( VikViewport *vvp, gdouble xympp ) | |
666 | { | |
667 | g_return_if_fail ( vvp != NULL ); | |
668 | if ( xympp >= VIK_VIEWPORT_MIN_ZOOM && xympp <= VIK_VIEWPORT_MAX_ZOOM ) | |
669 | vvp->xmpp = vvp->ympp = xympp; | |
670 | ||
671 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
672 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
673 | } |
674 | ||
675 | /* or could do factor */ | |
676 | void vik_viewport_zoom_in ( VikViewport *vvp ) | |
677 | { | |
678 | g_return_if_fail ( vvp != NULL ); | |
679 | if ( vvp->xmpp >= (VIK_VIEWPORT_MIN_ZOOM*2) && vvp->ympp >= (VIK_VIEWPORT_MIN_ZOOM*2) ) | |
680 | { | |
681 | vvp->xmpp /= 2; | |
682 | vvp->ympp /= 2; | |
683 | ||
50a14534 EB |
684 | viewport_utm_zone_check(vvp); |
685 | } | |
686 | } | |
687 | ||
688 | void vik_viewport_zoom_out ( VikViewport *vvp ) | |
689 | { | |
690 | g_return_if_fail ( vvp != NULL ); | |
691 | if ( vvp->xmpp <= (VIK_VIEWPORT_MAX_ZOOM/2) && vvp->ympp <= (VIK_VIEWPORT_MAX_ZOOM/2) ) | |
692 | { | |
693 | vvp->xmpp *= 2; | |
694 | vvp->ympp *= 2; | |
695 | ||
50a14534 EB |
696 | viewport_utm_zone_check(vvp); |
697 | } | |
698 | } | |
699 | ||
700 | gdouble vik_viewport_get_zoom ( VikViewport *vvp ) | |
701 | { | |
702 | if ( vvp->xmpp == vvp->ympp ) | |
703 | return vvp->xmpp; | |
704 | return 0.0; | |
705 | } | |
706 | ||
707 | gdouble vik_viewport_get_xmpp ( VikViewport *vvp ) | |
708 | { | |
709 | return vvp->xmpp; | |
710 | } | |
711 | ||
712 | gdouble vik_viewport_get_ympp ( VikViewport *vvp ) | |
713 | { | |
714 | return vvp->ympp; | |
715 | } | |
716 | ||
717 | void vik_viewport_set_xmpp ( VikViewport *vvp, gdouble xmpp ) | |
718 | { | |
719 | if ( xmpp >= VIK_VIEWPORT_MIN_ZOOM && xmpp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
720 | vvp->xmpp = xmpp; | |
721 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
722 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
723 | } |
724 | } | |
725 | ||
726 | void vik_viewport_set_ympp ( VikViewport *vvp, gdouble ympp ) | |
727 | { | |
728 | if ( ympp >= VIK_VIEWPORT_MIN_ZOOM && ympp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
729 | vvp->ympp = ympp; | |
730 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
731 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
732 | } |
733 | } | |
734 | ||
735 | ||
736 | const VikCoord *vik_viewport_get_center ( VikViewport *vvp ) | |
737 | { | |
738 | g_return_val_if_fail ( vvp != NULL, NULL ); | |
739 | return &(vvp->center); | |
740 | } | |
741 | ||
742 | /* called every time we update coordinates/zoom */ | |
743 | static void viewport_utm_zone_check ( VikViewport *vvp ) | |
744 | { | |
745 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
746 | { | |
747 | struct UTM utm; | |
748 | struct LatLon ll; | |
749 | a_coords_utm_to_latlon ( (struct UTM *) &(vvp->center), &ll ); | |
750 | a_coords_latlon_to_utm ( &ll, &utm ); | |
751 | if ( utm.zone != vvp->center.utm_zone ) | |
752 | *((struct UTM *)(&vvp->center)) = utm; | |
753 | ||
754 | /* misc. stuff so we don't have to check later */ | |
755 | vvp->utm_zone_width = viewport_utm_zone_width ( vvp ); | |
756 | vvp->one_utm_zone = ( vik_viewport_rightmost_zone(vvp) == vik_viewport_leftmost_zone(vvp) ); | |
757 | } | |
758 | } | |
759 | ||
760 | void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll ) | |
761 | { | |
762 | vik_coord_load_from_latlon ( &(vvp->center), vvp->coord_mode, ll ); | |
763 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
764 | viewport_utm_zone_check ( vvp ); | |
765 | } | |
766 | ||
767 | void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm ) | |
768 | { | |
769 | vik_coord_load_from_utm ( &(vvp->center), vvp->coord_mode, utm ); | |
770 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
771 | viewport_utm_zone_check ( vvp ); | |
772 | } | |
773 | ||
774 | void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord ) | |
775 | { | |
776 | vvp->center = *coord; | |
777 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
778 | viewport_utm_zone_check ( vvp ); | |
779 | } | |
780 | ||
781 | void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br ) | |
782 | { | |
783 | g_return_if_fail ( vvp->coord_mode == VIK_COORD_UTM ); | |
784 | ||
785 | /* get center, then just offset */ | |
786 | vik_viewport_center_for_zonen ( vvp, VIK_UTM(ul), zone ); | |
787 | ul->mode = VIK_COORD_UTM; | |
788 | *br = *ul; | |
789 | ||
790 | ul->north_south += (vvp->ympp * vvp->height / 2); | |
791 | ul->east_west -= (vvp->xmpp * vvp->width / 2); | |
792 | br->north_south -= (vvp->ympp * vvp->height / 2); | |
793 | br->east_west += (vvp->xmpp * vvp->width / 2); | |
794 | } | |
795 | ||
796 | void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone) | |
797 | { | |
798 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
799 | *center = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
800 | center->easting -= ( zone - center->zone ) * vvp->utm_zone_width; | |
801 | center->zone = zone; | |
802 | } | |
803 | } | |
804 | ||
805 | gchar vik_viewport_leftmost_zone ( VikViewport *vvp ) | |
806 | { | |
807 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
808 | VikCoord coord; | |
809 | g_assert ( vvp != NULL ); | |
810 | vik_viewport_screen_to_coord ( vvp, 0, 0, &coord ); | |
811 | return coord.utm_zone; | |
812 | } | |
813 | return '\0'; | |
814 | } | |
815 | ||
816 | gchar vik_viewport_rightmost_zone ( VikViewport *vvp ) | |
817 | { | |
818 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
819 | VikCoord coord; | |
820 | g_assert ( vvp != NULL ); | |
821 | vik_viewport_screen_to_coord ( vvp, vvp->width, 0, &coord ); | |
822 | return coord.utm_zone; | |
823 | } | |
824 | return '\0'; | |
825 | } | |
826 | ||
827 | ||
828 | void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y ) | |
829 | { | |
830 | g_return_if_fail ( vvp != NULL ); | |
831 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
832 | /* slightly optimized */ | |
833 | vvp->center.east_west += vvp->xmpp * (x - (vvp->width/2)); | |
834 | vvp->center.north_south += vvp->ympp * ((vvp->height/2) - y); | |
835 | viewport_utm_zone_check ( vvp ); | |
836 | } else { | |
837 | VikCoord tmp; | |
838 | vik_viewport_screen_to_coord ( vvp, x, y, &tmp ); | |
839 | vik_viewport_set_center_coord ( vvp, &tmp ); | |
840 | } | |
841 | } | |
842 | ||
843 | gint vik_viewport_get_width( VikViewport *vvp ) | |
844 | { | |
845 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
846 | return vvp->width; | |
847 | } | |
848 | ||
849 | gint vik_viewport_get_height( VikViewport *vvp ) | |
850 | { | |
851 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
852 | return vvp->height; | |
853 | } | |
854 | ||
855 | void vik_viewport_screen_to_coord ( VikViewport *vvp, int x, int y, VikCoord *coord ) | |
856 | { | |
c53eda9a GB |
857 | g_return_if_fail ( vvp != NULL ); |
858 | ||
50a14534 EB |
859 | if ( vvp->coord_mode == VIK_COORD_UTM ) { |
860 | int zone_delta; | |
861 | struct UTM *utm = (struct UTM *) coord; | |
862 | coord->mode = VIK_COORD_UTM; | |
863 | ||
50a14534 EB |
864 | utm->zone = vvp->center.utm_zone; |
865 | utm->letter = vvp->center.utm_letter; | |
866 | utm->easting = ( ( x - ( vvp->width / 2) ) * vvp->xmpp ) + vvp->center.east_west; | |
867 | zone_delta = floor( (utm->easting - EASTING_OFFSET ) / vvp->utm_zone_width + 0.5 ); | |
868 | utm->zone += zone_delta; | |
869 | utm->easting -= zone_delta * vvp->utm_zone_width; | |
870 | utm->northing = ( ( ( vvp->height / 2) - y ) * vvp->ympp ) + vvp->center.north_south; | |
871 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
872 | coord->mode = VIK_COORD_LATLON; | |
d587678a GB |
873 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
874 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
875 | coord->north_south = vvp->center.north_south + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)); | |
876 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) | |
50a14534 | 877 | 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 | 878 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
50a14534 EB |
879 | /* FIXMERCATOR */ |
880 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
881 | coord->north_south = DEMERCLAT ( MERCLAT(vvp->center.north_south) + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) ); | |
882 | ||
883 | #if 0 | |
884 | --> THIS IS JUNK HERE. | |
885 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
886 | ||
887 | (*y - vvp->height/2) / 256 / 65536 * 180 * vvp->ympp = (MERCLAT(center->lat) - MERCLAT(ll->lat); | |
888 | DML((180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) + ML(cl)) = ll | |
889 | #endif | |
890 | } | |
891 | } | |
892 | } | |
893 | ||
894 | void vik_viewport_coord_to_screen ( VikViewport *vvp, const VikCoord *coord, int *x, int *y ) | |
895 | { | |
896 | static VikCoord tmp; | |
897 | g_return_if_fail ( vvp != NULL ); | |
898 | ||
899 | if ( coord->mode != vvp->coord_mode ) | |
900 | { | |
901 | g_warning ( "Have to convert in vik_viewport_coord_to_screen! This should never happen!"); | |
902 | vik_coord_copy_convert ( coord, vvp->coord_mode, &tmp ); | |
903 | coord = &tmp; | |
904 | } | |
905 | ||
906 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
907 | struct UTM *center = (struct UTM *) &(vvp->center); | |
908 | struct UTM *utm = (struct UTM *) coord; | |
909 | if ( center->zone != utm->zone && vvp->one_utm_zone ) | |
910 | { | |
911 | *x = *y = VIK_VIEWPORT_UTM_WRONG_ZONE; | |
912 | return; | |
913 | } | |
914 | ||
915 | *x = ( (utm->easting - center->easting) / vvp->xmpp ) + (vvp->width / 2) - | |
916 | (center->zone - utm->zone ) * vvp->utm_zone_width / vvp->xmpp; | |
917 | *y = (vvp->height / 2) - ( (utm->northing - center->northing) / vvp->ympp ); | |
918 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
919 | struct LatLon *center = (struct LatLon *) &(vvp->center); | |
920 | struct LatLon *ll = (struct LatLon *) coord; | |
921 | double xx,yy; | |
d587678a GB |
922 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
923 | /* FIXMERCATOR: Optimize */ | |
924 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
925 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (center->lat - ll->lat))*256.0; | |
926 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) { | |
50a14534 EB |
927 | 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 ); |
928 | *x = xx; *y = yy; | |
50a14534 EB |
929 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
930 | /* FIXMERCATOR: Optimize */ | |
931 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
932 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
933 | } | |
934 | } | |
935 | } | |
936 | ||
d9ffd267 EB |
937 | void a_viewport_clip_line ( gint *x1, gint *y1, gint *x2, gint *y2 ) |
938 | { | |
939 | if ( *x1 > 20000 || *x1 < -20000 ) { | |
940 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
941 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
942 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
943 | } else if ( *y1 > 20000 || *y1 < -20000 ) { | |
944 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
945 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
946 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
947 | } else if ( *x2 > 20000 || *x2 < -20000 ) { | |
948 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
949 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
950 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
d9ffd267 EB |
951 | } else if ( *y2 > 20000 || *y2 < -20000 ) { |
952 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
953 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
954 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
955 | } | |
956 | } | |
957 | ||
50a14534 EB |
958 | void vik_viewport_draw_line ( VikViewport *vvp, GdkGC *gc, gint x1, gint y1, gint x2, gint y2 ) |
959 | { | |
960 | if ( ! ( ( x1 < 0 && x2 < 0 ) || ( y1 < 0 && y2 < 0 ) || | |
d9ffd267 EB |
961 | ( x1 > vvp->width && x2 > vvp->width ) || ( y1 > vvp->height && y2 > vvp->height ) ) ) { |
962 | /*** clipping, yeah! ***/ | |
963 | a_viewport_clip_line ( &x1, &y1, &x2, &y2 ); | |
964 | gdk_draw_line ( vvp->scr_buffer, gc, x1, y1, x2, y2); | |
965 | } | |
50a14534 EB |
966 | } |
967 | ||
968 | void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 ) | |
969 | { | |
add30ebe RN |
970 | // Using 32 as half the default waypoint image size, so this draws ensures the highlight gets done |
971 | if ( x1 > -32 && x1 < vvp->width + 32 && y1 > -32 && y1 < vvp->height + 32 ) | |
50a14534 EB |
972 | gdk_draw_rectangle ( vvp->scr_buffer, gc, filled, x1, y1, x2, y2); |
973 | } | |
974 | ||
975 | void vik_viewport_draw_string ( VikViewport *vvp, GdkFont *font, GdkGC *gc, gint x1, gint y1, const gchar *string ) | |
976 | { | |
977 | if ( x1 > -100 && x1 < vvp->width + 100 && y1 > -100 && y1 < vvp->height + 100 ) | |
978 | gdk_draw_string ( vvp->scr_buffer, font, gc, x1, y1, string ); | |
979 | } | |
980 | ||
981 | /* shouldn't use this -- slow -- change the alpha channel instead. */ | |
982 | void vik_viewport_draw_pixbuf_with_alpha ( VikViewport *vvp, GdkPixbuf *pixbuf, gint alpha, | |
983 | gint src_x, gint src_y, gint dest_x, gint dest_y, gint w, gint h ) | |
984 | { | |
985 | gint real_dest_x = MAX(dest_x,0); | |
986 | gint real_dest_y = MAX(dest_y,0); | |
987 | ||
988 | if ( alpha == 0 ) | |
989 | return; /* don't waste your time */ | |
990 | ||
991 | if ( w > vvp->alpha_pixbuf_width || h > vvp->alpha_pixbuf_height ) | |
992 | { | |
993 | if ( vvp->alpha_pixbuf ) | |
994 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
995 | vvp->alpha_pixbuf_width = MAX(w,vvp->alpha_pixbuf_width); | |
996 | vvp->alpha_pixbuf_height = MAX(h,vvp->alpha_pixbuf_height); | |
997 | vvp->alpha_pixbuf = gdk_pixbuf_new ( GDK_COLORSPACE_RGB, FALSE, 8, vvp->alpha_pixbuf_width, vvp->alpha_pixbuf_height ); | |
998 | } | |
999 | ||
1000 | w = MIN(w,vvp->width - dest_x); | |
1001 | h = MIN(h,vvp->height - dest_y); | |
1002 | ||
1003 | /* check that we are drawing within boundaries. */ | |
1004 | src_x += (real_dest_x - dest_x); | |
1005 | src_y += (real_dest_y - dest_y); | |
1006 | w -= (real_dest_x - dest_x); | |
1007 | h -= (real_dest_y - dest_y); | |
1008 | ||
1009 | gdk_pixbuf_get_from_drawable ( vvp->alpha_pixbuf, vvp->scr_buffer, NULL, | |
1010 | real_dest_x, real_dest_y, 0, 0, w, h ); | |
1011 | ||
1012 | /* do a composite */ | |
1013 | gdk_pixbuf_composite ( pixbuf, vvp->alpha_pixbuf, 0, 0, w, h, -src_x, -src_y, 1, 1, 0, alpha ); | |
1014 | ||
1015 | /* draw pixbuf_tmp */ | |
1016 | vik_viewport_draw_pixbuf ( vvp, vvp->alpha_pixbuf, 0, 0, real_dest_x, real_dest_y, w, h ); | |
1017 | } | |
1018 | ||
1019 | void vik_viewport_draw_pixbuf ( VikViewport *vvp, GdkPixbuf *pixbuf, gint src_x, gint src_y, | |
1020 | gint dest_x, gint dest_y, gint w, gint h ) | |
1021 | { | |
1022 | gdk_draw_pixbuf ( vvp->scr_buffer, | |
ff37db21 RN |
1023 | NULL, |
1024 | pixbuf, | |
50a14534 EB |
1025 | src_x, src_y, dest_x, dest_y, w, h, |
1026 | GDK_RGB_DITHER_NONE, 0, 0 ); | |
1027 | } | |
1028 | ||
1029 | void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2 ) | |
1030 | { | |
1031 | gdk_draw_arc ( vvp->scr_buffer, gc, filled, x, y, width, height, angle1, angle2 ); | |
1032 | } | |
1033 | ||
1034 | ||
1035 | void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints ) | |
1036 | { | |
1037 | gdk_draw_polygon ( vvp->scr_buffer, gc, filled, points, npoints ); | |
1038 | } | |
1039 | ||
1040 | VikCoordMode vik_viewport_get_coord_mode ( const VikViewport *vvp ) | |
1041 | { | |
1042 | g_assert ( vvp ); | |
1043 | return vvp->coord_mode; | |
1044 | } | |
1045 | ||
1046 | static void viewport_set_coord_mode ( VikViewport *vvp, VikCoordMode mode ) | |
1047 | { | |
1048 | g_return_if_fail ( vvp != NULL ); | |
1049 | vvp->coord_mode = mode; | |
1050 | vik_coord_convert ( &(vvp->center), mode ); | |
1051 | } | |
1052 | ||
1053 | /* Thanks GPSDrive */ | |
1054 | 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 ) | |
1055 | { | |
1056 | int px, py; | |
1057 | gdouble dif, lat, lon; | |
1058 | double Ra = Radius[90+(gint)zero_lat]; | |
1059 | ||
1060 | px = (mapSizeX2 - x) * pixelfact_x; | |
1061 | py = (-mapSizeY2 + y) * pixelfact_y; | |
1062 | ||
1063 | lat = zero_lat - py / Ra; | |
1064 | lat = zero_lat - py / Ra; | |
1065 | lon = | |
1066 | zero_long - | |
1067 | px / (Ra * | |
81765f5e | 1068 | cos (DEG2RAD(lat))); |
50a14534 | 1069 | |
81765f5e | 1070 | dif = lat * (1 - (cos (DEG2RAD(fabs (lon - zero_long))))); |
50a14534 EB |
1071 | lat = lat - dif / 1.5; |
1072 | lon = | |
1073 | zero_long - | |
1074 | px / (Ra * | |
81765f5e | 1075 | cos (DEG2RAD(lat))); |
50a14534 EB |
1076 | |
1077 | *lt = lat; | |
1078 | *lg = lon; | |
1079 | return (TRUE); | |
1080 | } | |
1081 | ||
1082 | /* Thanks GPSDrive */ | |
1083 | 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 ) | |
1084 | { | |
1085 | double dif; | |
1086 | double Ra; | |
1087 | gint mapSizeX = 2 * mapSizeX2; | |
1088 | gint mapSizeY = 2 * mapSizeY2; | |
1089 | ||
1090 | g_assert ( lt >= -90.0 && lt <= 90.0 ); | |
1091 | // lg *= rad2deg; // FIXME, optimize equations | |
1092 | // lt *= rad2deg; | |
1093 | Ra = Radius[90+(gint)lt]; | |
1094 | *x = Ra * | |
81765f5e | 1095 | cos (DEG2RAD(lt)) * (lg - zero_long); |
50a14534 | 1096 | *y = Ra * (lt - zero_lat); |
81765f5e | 1097 | dif = Ra * RAD2DEG(1 - (cos ((DEG2RAD(lg - zero_long))))); |
50a14534 EB |
1098 | *y = *y + dif / 1.85; |
1099 | *x = *x / pixelfact_x; | |
1100 | *y = *y / pixelfact_y; | |
1101 | *x = mapSizeX2 - *x; | |
1102 | *y += mapSizeY2; | |
1103 | if ((*x < 0)||(*x >= mapSizeX)||(*y < 0)||(*y >= mapSizeY)) | |
1104 | return (FALSE); | |
1105 | return (TRUE); | |
1106 | } | |
1107 | ||
1108 | static void viewport_init_ra() | |
1109 | { | |
1110 | static gboolean done_before = FALSE; | |
1111 | if ( !done_before ) | |
1112 | { | |
1113 | gint i; | |
1114 | for ( i = -90; i <= 90; i++) | |
81765f5e | 1115 | Radius[i+90] = calcR ( DEG2RAD((double)i) ); |
50a14534 EB |
1116 | done_before = TRUE; |
1117 | } | |
1118 | } | |
1119 | ||
1120 | double calcR (double lat) | |
1121 | { | |
1122 | double a = 6378.137, r, sc, x, y, z; | |
1123 | double e2 = 0.081082 * 0.081082; | |
1124 | /* | |
1125 | * the radius of curvature of an ellipsoidal Earth in the plane of the | |
1126 | * meridian is given by | |
1127 | * | |
1128 | * R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2) | |
1129 | * | |
1130 | * | |
1131 | * where a is the equatorial radius, b is the polar radius, and e is | |
1132 | * the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2) | |
1133 | * | |
1134 | * a = 6378 km (3963 mi) Equatorial radius (surface to center distance) | |
1135 | * b = 6356.752 km (3950 mi) Polar radius (surface to center distance) e | |
1136 | * = 0.081082 Eccentricity | |
1137 | */ | |
1138 | ||
81765f5e | 1139 | lat = DEG2RAD(lat); |
50a14534 EB |
1140 | sc = sin (lat); |
1141 | x = a * (1.0 - e2); | |
1142 | z = 1.0 - e2 * sc * sc; | |
1143 | y = pow (z, 1.5); | |
1144 | r = x / y; | |
1145 | r = r * 1000.0; | |
1146 | return r; | |
1147 | } | |
1148 | ||
1149 | gboolean vik_viewport_is_one_zone ( VikViewport *vvp ) | |
1150 | { | |
1151 | return vvp->coord_mode == VIK_COORD_UTM && vvp->one_utm_zone; | |
1152 | } | |
1153 | ||
1154 | void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout ) | |
1155 | { | |
1156 | if ( x > -100 && x < vvp->width + 100 && y > -100 && y < vvp->height + 100 ) | |
1157 | gdk_draw_layout ( vvp->scr_buffer, gc, x, y, layout ); | |
1158 | } | |
1159 | ||
1160 | void vik_gc_get_fg_color ( GdkGC *gc, GdkColor *dest ) | |
1161 | { | |
1162 | static GdkGCValues values; | |
1163 | gdk_gc_get_values ( gc, &values ); | |
1164 | gdk_colormap_query_color ( gdk_colormap_get_system(), values.foreground.pixel, dest ); | |
1165 | } | |
1166 | ||
1167 | GdkFunction vik_gc_get_function ( GdkGC *gc ) | |
1168 | { | |
1169 | static GdkGCValues values; | |
1170 | gdk_gc_get_values ( gc, &values ); | |
1171 | return values.function; | |
1172 | } | |
1173 | ||
1174 | void vik_viewport_set_drawmode ( VikViewport *vvp, VikViewportDrawMode drawmode ) | |
1175 | { | |
1176 | vvp->drawmode = drawmode; | |
1177 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
1178 | viewport_set_coord_mode ( vvp, VIK_COORD_UTM ); | |
1179 | else { | |
1180 | viewport_set_coord_mode ( vvp, VIK_COORD_LATLON ); | |
50a14534 EB |
1181 | } |
1182 | } | |
1183 | ||
1184 | VikViewportDrawMode vik_viewport_get_drawmode ( VikViewport *vvp ) | |
1185 | { | |
1186 | return vvp->drawmode; | |
1187 | } | |
1188 | ||
0df66d57 EB |
1189 | /******** triggering *******/ |
1190 | void vik_viewport_set_trigger ( VikViewport *vp, gpointer trigger ) | |
1191 | { | |
1192 | vp->trigger = trigger; | |
1193 | } | |
1194 | ||
1195 | gpointer vik_viewport_get_trigger ( VikViewport *vp ) | |
1196 | { | |
1197 | return vp->trigger; | |
1198 | } | |
1199 | ||
1200 | void vik_viewport_snapshot_save ( VikViewport *vp ) | |
1201 | { | |
1202 | gdk_draw_drawable ( vp->snapshot_buffer, vp->background_gc, vp->scr_buffer, 0, 0, 0, 0, -1, -1 ); | |
1203 | } | |
1204 | ||
1205 | void vik_viewport_snapshot_load ( VikViewport *vp ) | |
1206 | { | |
1207 | gdk_draw_drawable ( vp->scr_buffer, vp->background_gc, vp->snapshot_buffer, 0, 0, 0, 0, -1, -1 ); | |
1208 | } | |
1209 | ||
1210 | void vik_viewport_set_half_drawn(VikViewport *vp, gboolean half_drawn) | |
1211 | { | |
1212 | vp->half_drawn = half_drawn; | |
1213 | } | |
1214 | ||
1215 | gboolean vik_viewport_get_half_drawn( VikViewport *vp ) | |
1216 | { | |
1217 | return vp->half_drawn; | |
1218 | } | |
1219 | ||
7bc965c0 GB |
1220 | |
1221 | const gchar *vik_viewport_get_drawmode_name(VikViewport *vv, VikViewportDrawMode mode) | |
0c1044e9 | 1222 | { |
7bc965c0 | 1223 | const gchar *name = NULL; |
24277274 | 1224 | VikWindow *vw = NULL; |
7bc965c0 GB |
1225 | GtkWidget *mode_button; |
1226 | GtkWidget *label; | |
24277274 GB |
1227 | |
1228 | vw = VIK_WINDOW_FROM_WIDGET(vv); | |
1229 | mode_button = vik_window_get_drawmode_button(vw, mode); | |
7bc965c0 GB |
1230 | label = gtk_bin_get_child(GTK_BIN(mode_button)); |
1231 | ||
1232 | name = gtk_label_get_text ( GTK_LABEL(label) ); | |
314c1ccc | 1233 | |
7bc965c0 | 1234 | return name; |
314c1ccc QT |
1235 | |
1236 | } | |
7bc965c0 | 1237 | |
0c1044e9 EB |
1238 | void vik_viewport_get_min_max_lat_lon ( VikViewport *vp, gdouble *min_lat, gdouble *max_lat, gdouble *min_lon, gdouble *max_lon ) |
1239 | { | |
1240 | VikCoord tleft, tright, bleft, bright; | |
1241 | ||
1242 | vik_viewport_screen_to_coord ( vp, 0, 0, &tleft ); | |
1243 | vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright ); | |
1244 | vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft ); | |
1245 | vik_viewport_screen_to_coord ( vp, vp->width, vp->height, &bright ); | |
7bc965c0 | 1246 | |
0c1044e9 EB |
1247 | vik_coord_convert(&tleft, VIK_COORD_LATLON); |
1248 | vik_coord_convert(&tright, VIK_COORD_LATLON); | |
1249 | vik_coord_convert(&bleft, VIK_COORD_LATLON); | |
1250 | vik_coord_convert(&bright, VIK_COORD_LATLON); | |
1251 | ||
1252 | *max_lat = MAX(tleft.north_south, tright.north_south); | |
1253 | *min_lat = MIN(bleft.north_south, bright.north_south); | |
1254 | *max_lon = MAX(tright.east_west, bright.east_west); | |
1255 | *min_lon = MIN(tleft.east_west, bleft.east_west); | |
1256 | } | |
82aa018d GB |
1257 | |
1258 | void vik_viewport_reset_copyrights ( VikViewport *vp ) | |
1259 | { | |
1260 | g_return_if_fail ( vp != NULL ); | |
1261 | g_slist_foreach ( vp->copyrights, (GFunc)g_free, NULL ); | |
1262 | g_slist_free ( vp->copyrights ); | |
1263 | vp->copyrights = NULL; | |
1264 | } | |
1265 | ||
33e0e500 GB |
1266 | /** |
1267 | * vik_viewport_add_copyright: | |
1268 | * @vp: self object | |
1269 | * @copyright: new copyright to display | |
1270 | * | |
1271 | * Add a copyright to display on viewport. | |
1272 | */ | |
82aa018d GB |
1273 | void vik_viewport_add_copyright ( VikViewport *vp, const gchar *copyright ) |
1274 | { | |
1275 | g_return_if_fail ( vp != NULL ); | |
1276 | if ( copyright ) | |
1277 | { | |
bbbd639f | 1278 | GSList *found = g_slist_find_custom ( vp->copyrights, copyright, (GCompareFunc)strcmp ); |
82aa018d GB |
1279 | if ( found == NULL ) |
1280 | { | |
1281 | gchar *duple = g_strdup ( copyright ); | |
1282 | vp->copyrights = g_slist_prepend ( vp->copyrights, duple ); | |
1283 | } | |
1284 | } | |
1285 | } | |
26336cf0 GB |
1286 | |
1287 | void vik_viewport_reset_logos ( VikViewport *vp ) | |
1288 | { | |
1289 | g_return_if_fail ( vp != NULL ); | |
1290 | /* do not free elem */ | |
1291 | g_slist_free ( vp->logos ); | |
1292 | vp->logos = NULL; | |
1293 | } | |
1294 | ||
1295 | void vik_viewport_add_logo ( VikViewport *vp, const GdkPixbuf *logo ) | |
1296 | { | |
1297 | g_return_if_fail ( vp != NULL ); | |
1298 | if ( logo ) | |
1299 | { | |
1300 | GdkPixbuf *found = NULL; /* FIXME (GdkPixbuf*)g_slist_find_custom ( vp->logos, logo, (GCompareFunc)== ); */ | |
1301 | if ( found == NULL ) | |
1302 | { | |
1303 | vp->logos = g_slist_prepend ( vp->logos, (gpointer)logo ); | |
1304 | } | |
1305 | } | |
1306 | } | |
9a3538f5 GB |
1307 | |
1308 | /** | |
1309 | * vik_viewport_compute_bearing: | |
1310 | * @vp: self object | |
1311 | * @x1: screen coord | |
1312 | * @y1: screen coord | |
1313 | * @x2: screen coord | |
1314 | * @y2: screen coord | |
1315 | * @angle: bearing in Radian (output) | |
1316 | * @baseangle: UTM base angle in Radian (output) | |
1317 | * | |
1318 | * Compute bearing. | |
1319 | */ | |
1320 | void vik_viewport_compute_bearing ( VikViewport *vp, gint x1, gint y1, gint x2, gint y2, gdouble *angle, gdouble *baseangle ) | |
1321 | { | |
1322 | gdouble len = sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2)); | |
1323 | gdouble dx = (x2-x1)/len*10; | |
1324 | gdouble dy = (y2-y1)/len*10; | |
1325 | ||
1326 | *angle = atan2(dy, dx) + M_PI_2; | |
1327 | ||
1328 | if ( vik_viewport_get_drawmode ( vp ) == VIK_VIEWPORT_DRAWMODE_UTM) { | |
1329 | VikCoord test; | |
1330 | struct LatLon ll; | |
1331 | struct UTM u; | |
1332 | gint tx, ty; | |
1333 | ||
1334 | vik_viewport_screen_to_coord ( vp, x1, y1, &test ); | |
1335 | vik_coord_to_latlon ( &test, &ll ); | |
1336 | ll.lat += vik_viewport_get_ympp ( vp ) * vik_viewport_get_height ( vp ) / 11000.0; // about 11km per degree latitude | |
1337 | a_coords_latlon_to_utm ( &ll, &u ); | |
1338 | vik_coord_load_from_utm ( &test, VIK_VIEWPORT_DRAWMODE_UTM, &u ); | |
1339 | vik_viewport_coord_to_screen ( vp, &test, &tx, &ty ); | |
1340 | ||
1341 | *baseangle = M_PI - atan2(tx-x1, ty-y1); | |
1342 | *angle -= *baseangle; | |
1343 | } | |
1344 | ||
1345 | if (*angle < 0) | |
1346 | *angle += 2*M_PI; | |
1347 | if (*angle > 2*M_PI) | |
1348 | *angle -= 2*M_PI; | |
1349 | } |