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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" | |
31 | ||
32 | #include <gtk/gtk.h> | |
8c00358d | 33 | #ifdef HAVE_MATH_H |
50a14534 | 34 | #include <math.h> |
8c00358d | 35 | #endif |
82aa018d GB |
36 | #ifdef HAVE_STRING_H |
37 | #include <string.h> | |
38 | #endif | |
50a14534 EB |
39 | |
40 | #include "coords.h" | |
41 | #include "vikcoord.h" | |
a59e6eb9 | 42 | #include "vikwindow.h" |
50a14534 EB |
43 | #include "vikviewport.h" |
44 | ||
45 | #include "mapcoord.h" | |
46 | ||
47 | /* for ALTI_TO_MPP */ | |
48 | #include "globals.h" | |
50a14534 EB |
49 | |
50 | static gdouble EASTING_OFFSET = 500000.0; | |
51 | ||
52 | static void viewport_class_init ( VikViewportClass *klass ); | |
53 | static void viewport_init ( VikViewport *vvp ); | |
54 | static void viewport_finalize ( GObject *gob ); | |
55 | static void viewport_utm_zone_check ( VikViewport *vvp ); | |
56 | ||
57 | 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 ); | |
58 | 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 ); | |
59 | double calcR (double lat); | |
60 | ||
61 | static double Radius[181]; | |
62 | static void viewport_init_ra(); | |
63 | ||
64 | static GObjectClass *parent_class; | |
65 | ||
50a14534 EB |
66 | |
67 | struct _VikViewport { | |
68 | GtkDrawingArea drawing_area; | |
69 | GdkPixmap *scr_buffer; | |
70 | gint width, height; | |
71 | VikCoord center; | |
72 | VikCoordMode coord_mode; | |
73 | gdouble xmpp, ympp; | |
74 | ||
75 | GdkPixbuf *alpha_pixbuf; | |
76 | guint8 alpha_pixbuf_width; | |
77 | guint8 alpha_pixbuf_height; | |
78 | ||
79 | gdouble utm_zone_width; | |
80 | gboolean one_utm_zone; | |
81 | ||
82 | GdkGC *background_gc; | |
83 | GdkColor background_color; | |
4e485bf3 | 84 | GdkGC *scale_bg_gc; |
82aa018d GB |
85 | |
86 | GSList *copyrights; | |
87 | ||
88 | /* Wether or not display OSD info */ | |
35c7c0ba | 89 | gboolean draw_scale; |
c933487f | 90 | gboolean draw_centermark; |
50a14534 EB |
91 | |
92 | /* subset of coord types. lat lon can be plotted in 2 ways, google or exp. */ | |
93 | VikViewportDrawMode drawmode; | |
94 | ||
95 | /* handy conversion factors which make google plotting extremely fast */ | |
96 | gdouble google_calcx_fact; | |
97 | gdouble google_calcy_fact; | |
98 | gdouble google_calcx_rev_fact; | |
99 | gdouble google_calcy_rev_fact; | |
0df66d57 EB |
100 | |
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 | ||
126 | ||
127 | GType vik_viewport_get_type (void) | |
128 | { | |
129 | static GType vvp_type = 0; | |
130 | ||
131 | if (!vvp_type) | |
132 | { | |
133 | static const GTypeInfo vvp_info = | |
134 | { | |
135 | sizeof (VikViewportClass), | |
136 | NULL, /* base_init */ | |
137 | NULL, /* base_finalize */ | |
138 | (GClassInitFunc) viewport_class_init, | |
139 | NULL, /* class_finalize */ | |
140 | NULL, /* class_data */ | |
141 | sizeof (VikViewport), | |
142 | 0, | |
143 | (GInstanceInitFunc) viewport_init, | |
144 | }; | |
145 | vvp_type = g_type_register_static ( GTK_TYPE_DRAWING_AREA, "VikViewport", &vvp_info, 0 ); | |
146 | } | |
147 | return vvp_type; | |
148 | } | |
149 | ||
150 | static void viewport_class_init ( VikViewportClass *klass ) | |
151 | { | |
152 | /* Destructor */ | |
153 | GObjectClass *object_class; | |
154 | ||
155 | object_class = G_OBJECT_CLASS (klass); | |
156 | ||
157 | object_class->finalize = viewport_finalize; | |
158 | ||
159 | parent_class = g_type_class_peek_parent (klass); | |
160 | } | |
161 | ||
24277274 | 162 | VikViewport *vik_viewport_new () |
50a14534 | 163 | { |
a59e6eb9 | 164 | VikViewport *vv = VIK_VIEWPORT ( g_object_new ( VIK_VIEWPORT_TYPE, NULL ) ); |
a59e6eb9 | 165 | return vv; |
50a14534 EB |
166 | } |
167 | ||
168 | static void viewport_init ( VikViewport *vvp ) | |
169 | { | |
170 | viewport_init_ra(); | |
171 | ||
5210c3d3 GB |
172 | struct UTM utm; |
173 | struct LatLon ll; | |
174 | ll.lat = a_vik_get_default_lat(); | |
175 | ll.lon = a_vik_get_default_long(); | |
176 | a_coords_latlon_to_utm ( &ll, &utm ); | |
177 | ||
50a14534 EB |
178 | /* TODO: not static */ |
179 | vvp->xmpp = 4.0; | |
180 | vvp->ympp = 4.0; | |
6a9ff0ee QT |
181 | vvp->coord_mode = VIK_COORD_LATLON; |
182 | vvp->drawmode = VIK_VIEWPORT_DRAWMODE_MERCATOR; | |
ee180665 | 183 | vvp->center.mode = VIK_COORD_LATLON; |
5210c3d3 GB |
184 | vvp->center.north_south = ll.lat; |
185 | vvp->center.east_west = ll.lon; | |
186 | vvp->center.utm_zone = (int)utm.zone; | |
187 | vvp->center.utm_letter = utm.letter; | |
50a14534 EB |
188 | vvp->scr_buffer = NULL; |
189 | vvp->alpha_pixbuf = NULL; | |
190 | vvp->alpha_pixbuf_width = vvp->alpha_pixbuf_height = 0; | |
191 | vvp->utm_zone_width = 0.0; | |
192 | vvp->background_gc = NULL; | |
4e485bf3 | 193 | vvp->scale_bg_gc = NULL; |
82aa018d GB |
194 | |
195 | vvp->copyrights = NULL; | |
196 | ||
35c7c0ba | 197 | vvp->draw_scale = TRUE; |
c933487f | 198 | vvp->draw_centermark = TRUE; |
0df66d57 EB |
199 | |
200 | vvp->trigger = NULL; | |
201 | vvp->snapshot_buffer = NULL; | |
202 | vvp->half_drawn = FALSE; | |
203 | ||
50a14534 | 204 | g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL); |
165d30aa EB |
205 | |
206 | GTK_WIDGET_SET_FLAGS(vvp, GTK_CAN_FOCUS); /* allow VVP to have focus -- enabling key events, etc */ | |
50a14534 EB |
207 | } |
208 | ||
209 | GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp ) | |
210 | { | |
211 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
212 | *rv = vvp->background_color; | |
213 | return rv; | |
214 | } | |
215 | ||
216 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
217 | const gchar *vik_viewport_get_background_color ( VikViewport *vvp ) | |
218 | { | |
219 | static gchar color[8]; | |
220 | 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)); | |
221 | return color; | |
222 | } | |
223 | ||
224 | void vik_viewport_set_background_color ( VikViewport *vvp, const gchar *colorname ) | |
225 | { | |
52aa15a7 | 226 | g_assert ( vvp && vvp->background_gc ); |
b244bc6a GB |
227 | if ( gdk_color_parse ( colorname, &(vvp->background_color) ) ) |
228 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, &(vvp->background_color) ); | |
229 | else | |
230 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
231 | } |
232 | ||
233 | void vik_viewport_set_background_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
234 | { | |
52aa15a7 | 235 | g_assert ( vvp && vvp->background_gc ); |
50a14534 EB |
236 | vvp->background_color = *color; |
237 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, color ); | |
238 | } | |
239 | ||
240 | ||
241 | GdkGC *vik_viewport_new_gc ( VikViewport *vvp, const gchar *colorname, gint thickness ) | |
242 | { | |
b244bc6a | 243 | GdkGC *rv = NULL; |
50a14534 EB |
244 | GdkColor color; |
245 | ||
246 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
b244bc6a GB |
247 | if ( gdk_color_parse ( colorname, &color ) ) |
248 | gdk_gc_set_rgb_fg_color ( rv, &color ); | |
249 | else | |
250 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
251 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); |
252 | return rv; | |
253 | } | |
254 | ||
255 | GdkGC *vik_viewport_new_gc_from_color ( VikViewport *vvp, GdkColor *color, gint thickness ) | |
256 | { | |
257 | GdkGC *rv; | |
258 | ||
259 | rv = gdk_gc_new ( GTK_WIDGET(vvp)->window ); | |
260 | gdk_gc_set_rgb_fg_color ( rv, color ); | |
261 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
262 | return rv; | |
263 | } | |
264 | ||
265 | void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint height ) | |
266 | { | |
267 | vvp->width = width; | |
268 | vvp->height = height; | |
269 | if ( vvp->scr_buffer ) | |
270 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
271 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
0df66d57 EB |
272 | |
273 | /* TODO trigger: only if this is enabled !!! */ | |
274 | if ( vvp->snapshot_buffer ) | |
275 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
276 | vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
50a14534 EB |
277 | } |
278 | ||
279 | ||
280 | GdkPixmap *vik_viewport_get_pixmap ( VikViewport *vvp ) | |
281 | { | |
282 | return vvp->scr_buffer; | |
283 | } | |
284 | ||
285 | gboolean vik_viewport_configure ( VikViewport *vvp ) | |
286 | { | |
287 | g_return_val_if_fail ( vvp != NULL, TRUE ); | |
288 | ||
289 | vvp->width = GTK_WIDGET(vvp)->allocation.width; | |
290 | vvp->height = GTK_WIDGET(vvp)->allocation.height; | |
291 | ||
292 | if ( vvp->scr_buffer ) | |
293 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
294 | ||
295 | vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
296 | ||
0df66d57 EB |
297 | /* TODO trigger: only if enabled! */ |
298 | if ( vvp->snapshot_buffer ) | |
299 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
300 | ||
301 | vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 ); | |
302 | /* TODO trigger */ | |
303 | ||
50a14534 | 304 | /* this is down here so it can get a GC (necessary?) */ |
e8e82387 | 305 | if ( !vvp->background_gc ) |
50a14534 | 306 | { |
348e8666 | 307 | vvp->background_gc = vik_viewport_new_gc ( vvp, DEFAULT_BACKGROUND_COLOR, 1 ); |
e8e82387 | 308 | vik_viewport_set_background_color ( vvp, DEFAULT_BACKGROUND_COLOR ); |
50a14534 | 309 | } |
4e485bf3 QT |
310 | if ( !vvp->scale_bg_gc) { |
311 | vvp->scale_bg_gc = vik_viewport_new_gc(vvp, "grey", 3); | |
312 | } | |
50a14534 EB |
313 | |
314 | return FALSE; | |
315 | } | |
316 | ||
317 | static void viewport_finalize ( GObject *gob ) | |
318 | { | |
319 | VikViewport *vvp = VIK_VIEWPORT(gob); | |
320 | ||
321 | g_return_if_fail ( vvp != NULL ); | |
322 | ||
323 | if ( vvp->scr_buffer ) | |
324 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
325 | ||
0df66d57 EB |
326 | if ( vvp->snapshot_buffer ) |
327 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
328 | ||
50a14534 EB |
329 | if ( vvp->alpha_pixbuf ) |
330 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
331 | ||
332 | if ( vvp->background_gc ) | |
333 | g_object_unref ( G_OBJECT ( vvp->background_gc ) ); | |
334 | ||
4e485bf3 QT |
335 | if ( vvp->scale_bg_gc ) { |
336 | g_object_unref ( G_OBJECT ( vvp->scale_bg_gc ) ); | |
337 | vvp->scale_bg_gc = NULL; | |
338 | } | |
339 | ||
50a14534 EB |
340 | G_OBJECT_CLASS(parent_class)->finalize(gob); |
341 | } | |
342 | ||
343 | void vik_viewport_clear ( VikViewport *vvp ) | |
344 | { | |
345 | g_return_if_fail ( vvp != NULL ); | |
346 | gdk_draw_rectangle(GDK_DRAWABLE(vvp->scr_buffer), vvp->background_gc, TRUE, 0, 0, vvp->width, vvp->height); | |
82aa018d | 347 | vik_viewport_reset_copyrights ( vvp ); |
50a14534 EB |
348 | } |
349 | ||
35c7c0ba EB |
350 | void vik_viewport_set_draw_scale ( VikViewport *vvp, gboolean draw_scale ) |
351 | { | |
352 | vvp->draw_scale = draw_scale; | |
353 | } | |
354 | ||
355 | gboolean vik_viewport_get_draw_scale ( VikViewport *vvp ) | |
356 | { | |
357 | return vvp->draw_scale; | |
358 | } | |
359 | ||
acaf7113 AF |
360 | void vik_viewport_draw_scale ( VikViewport *vvp ) |
361 | { | |
c53eda9a GB |
362 | g_return_if_fail ( vvp != NULL ); |
363 | ||
35c7c0ba EB |
364 | if ( vvp->draw_scale ) { |
365 | VikCoord left, right; | |
366 | gdouble unit, base, diff, old_unit, old_diff, ratio; | |
367 | gint odd, len, PAD = 10, SCSIZE = 5, HEIGHT=10; | |
368 | PangoFontDescription *pfd; | |
369 | PangoLayout *pl; | |
370 | gchar s[128]; | |
acaf7113 | 371 | |
35c7c0ba EB |
372 | vik_viewport_screen_to_coord ( vvp, 0, vvp->height, &left ); |
373 | vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height, &right ); | |
acaf7113 | 374 | |
6f9336aa RN |
375 | vik_units_distance_t dist_units = a_vik_get_units_distance (); |
376 | switch (dist_units) { | |
377 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
378 | base = vik_coord_diff ( &left, &right ); // in meters | |
379 | break; | |
380 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a RN |
381 | // in 0.1 miles (copes better when zoomed in as 1 mile can be too big) |
382 | base = vik_coord_diff ( &left, &right ) * 0.00621371192; | |
6f9336aa RN |
383 | break; |
384 | default: | |
385 | base = 1; // Keep the compiler happy | |
386 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
387 | } | |
35c7c0ba | 388 | ratio = (vvp->width/SCSIZE)/base; |
acaf7113 | 389 | |
35c7c0ba EB |
390 | unit = 1; |
391 | diff = fabs(base-unit); | |
acaf7113 AF |
392 | old_unit = unit; |
393 | old_diff = diff; | |
35c7c0ba EB |
394 | odd = 1; |
395 | while (diff <= old_diff) { | |
396 | old_unit = unit; | |
397 | old_diff = diff; | |
398 | unit = unit * (odd%2 ? 5 : 2); | |
399 | diff = fabs(base-unit); | |
400 | odd++; | |
401 | } | |
402 | unit = old_unit; | |
403 | len = unit * ratio; | |
acaf7113 | 404 | |
4e485bf3 QT |
405 | /* white background */ |
406 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
407 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); | |
408 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
409 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); | |
410 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
411 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); | |
412 | /* black scale */ | |
35c7c0ba | 413 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 414 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); |
35c7c0ba | 415 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 416 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); |
35c7c0ba | 417 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 418 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); |
35c7c0ba EB |
419 | if (odd%2) { |
420 | int i; | |
421 | for (i=1; i<5; i++) { | |
4e485bf3 QT |
422 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
423 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
35c7c0ba | 424 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
acaf7113 | 425 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
35c7c0ba EB |
426 | } |
427 | } else { | |
428 | int i; | |
429 | for (i=1; i<10; i++) { | |
4e485bf3 QT |
430 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
431 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
35c7c0ba EB |
432 | vik_viewport_draw_line(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, |
433 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
434 | } | |
acaf7113 | 435 | } |
35c7c0ba EB |
436 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); |
437 | pfd = pango_font_description_from_string ("Sans 8"); // FIXME: settable option? global variable? | |
438 | pango_layout_set_font_description (pl, pfd); | |
439 | pango_font_description_free (pfd); | |
440 | ||
6f9336aa RN |
441 | switch (dist_units) { |
442 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
443 | if (unit >= 1000) { | |
444 | sprintf(s, "%d km", (int)unit/1000); | |
445 | } else { | |
446 | sprintf(s, "%d m", (int)unit); | |
447 | } | |
448 | break; | |
449 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a RN |
450 | // Handle units in 0.1 miles |
451 | if (unit < 10.0) { | |
452 | sprintf(s, "%0.1f miles", unit/10.0); | |
453 | } | |
454 | else if ((int)unit == 10.0) { | |
455 | sprintf(s, "1 mile"); | |
6f9336aa RN |
456 | } |
457 | else { | |
8d772d8a | 458 | sprintf(s, "%d miles", (int)(unit/10.0)); |
6f9336aa RN |
459 | } |
460 | break; | |
461 | default: | |
462 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
acaf7113 | 463 | } |
35c7c0ba EB |
464 | pango_layout_set_text(pl, s, -1); |
465 | vik_viewport_draw_layout(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
acaf7113 | 466 | PAD + len + PAD, vvp->height - PAD - 10, pl); |
6278ccc6 | 467 | g_object_unref(pl); |
e6869c62 | 468 | pl = NULL; |
35c7c0ba | 469 | } |
acaf7113 AF |
470 | } |
471 | ||
82aa018d GB |
472 | void vik_viewport_draw_copyright ( VikViewport *vvp ) |
473 | { | |
474 | g_return_if_fail ( vvp != NULL ); | |
475 | ||
82aa018d GB |
476 | gint PAD = 10; |
477 | PangoFontDescription *pfd; | |
478 | PangoLayout *pl; | |
479 | PangoRectangle ink_rect, logical_rect; | |
480 | gchar s[128] = ""; | |
481 | ||
482 | /* compute copyrights string */ | |
483 | guint len = g_slist_length ( vvp->copyrights ); | |
484 | int i; | |
485 | for (i = 0 ; i < len ; i++) | |
486 | { | |
487 | gchar *copyright = g_slist_nth_data ( vvp->copyrights, i ); | |
488 | strcat ( s, copyright ); | |
489 | strcat ( s, " " ); | |
490 | } | |
491 | ||
492 | /* create pango layout */ | |
493 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); | |
494 | pfd = pango_font_description_from_string ("Sans 8"); // FIXME: settable option? global variable? | |
495 | pango_layout_set_font_description (pl, pfd); | |
496 | pango_font_description_free (pfd); | |
497 | pfd = NULL; | |
498 | pango_layout_set_alignment ( pl, PANGO_ALIGN_RIGHT ); | |
499 | ||
500 | /* Set the text */ | |
501 | pango_layout_set_text(pl, s, -1); | |
502 | ||
503 | /* Use maximum of half the viewport width */ | |
504 | pango_layout_set_width ( pl, ( vvp->width / 2 - PAD ) * PANGO_SCALE ); | |
505 | pango_layout_get_pixel_extents(pl, &ink_rect, &logical_rect); | |
506 | vik_viewport_draw_layout(vvp, GTK_WIDGET(&vvp->drawing_area)->style->black_gc, | |
507 | vvp->width / 2, vvp->height - PAD - logical_rect.height, pl); | |
508 | ||
509 | /* Free memory */ | |
510 | g_object_unref(pl); | |
511 | pl = NULL; | |
512 | } | |
513 | ||
c933487f QT |
514 | void vik_viewport_set_draw_centermark ( VikViewport *vvp, gboolean draw_centermark ) |
515 | { | |
516 | vvp->draw_centermark = draw_centermark; | |
517 | } | |
518 | ||
519 | gboolean vik_viewport_get_draw_centermark ( VikViewport *vvp ) | |
520 | { | |
521 | return vvp->draw_centermark; | |
522 | } | |
523 | ||
524 | void vik_viewport_draw_centermark ( VikViewport *vvp ) | |
525 | { | |
c53eda9a GB |
526 | g_return_if_fail ( vvp != NULL ); |
527 | ||
c933487f QT |
528 | if ( !vvp->draw_centermark ) |
529 | return; | |
530 | ||
3df69a6b QT |
531 | const int len = 30; |
532 | const int gap = 4; | |
c933487f QT |
533 | int center_x = vvp->width/2; |
534 | int center_y = vvp->height/2; | |
535 | GdkGC * black_gc = GTK_WIDGET(&vvp->drawing_area)->style->black_gc; | |
536 | ||
537 | /* white back ground */ | |
3df69a6b QT |
538 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x - len, center_y, center_x - gap, center_y); |
539 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x + gap, center_y, center_x + len, center_y); | |
540 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y - len, center_x, center_y - gap); | |
541 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f | 542 | /* black fore ground */ |
3df69a6b QT |
543 | vik_viewport_draw_line(vvp, black_gc, center_x - len, center_y, center_x - gap, center_y); |
544 | vik_viewport_draw_line(vvp, black_gc, center_x + gap, center_y, center_x + len, center_y); | |
545 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y - len, center_x, center_y - gap); | |
546 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f QT |
547 | |
548 | } | |
549 | ||
50a14534 EB |
550 | void vik_viewport_sync ( VikViewport *vvp ) |
551 | { | |
552 | g_return_if_fail ( vvp != NULL ); | |
553 | 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); | |
554 | } | |
555 | ||
556 | void vik_viewport_pan_sync ( VikViewport *vvp, gint x_off, gint y_off ) | |
557 | { | |
acaf7113 AF |
558 | gint x, y, wid, hei; |
559 | ||
50a14534 EB |
560 | g_return_if_fail ( vvp != NULL ); |
561 | 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 |
562 | |
563 | if (x_off >= 0) { | |
564 | x = 0; | |
565 | wid = x_off; | |
566 | } else { | |
567 | x = vvp->width+x_off; | |
568 | wid = -x_off; | |
569 | } | |
570 | if (y_off >= 0) { | |
571 | y = 0; | |
572 | hei = y_off; | |
573 | } else { | |
574 | y = vvp->height+y_off; | |
575 | hei = -y_off; | |
576 | } | |
577 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), x, 0, wid, vvp->height); | |
578 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), 0, y, vvp->width, hei); | |
50a14534 EB |
579 | } |
580 | ||
581 | void vik_viewport_set_zoom ( VikViewport *vvp, gdouble xympp ) | |
582 | { | |
583 | g_return_if_fail ( vvp != NULL ); | |
584 | if ( xympp >= VIK_VIEWPORT_MIN_ZOOM && xympp <= VIK_VIEWPORT_MAX_ZOOM ) | |
585 | vvp->xmpp = vvp->ympp = xympp; | |
586 | ||
587 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
588 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
589 | } |
590 | ||
591 | /* or could do factor */ | |
592 | void vik_viewport_zoom_in ( VikViewport *vvp ) | |
593 | { | |
594 | g_return_if_fail ( vvp != NULL ); | |
595 | if ( vvp->xmpp >= (VIK_VIEWPORT_MIN_ZOOM*2) && vvp->ympp >= (VIK_VIEWPORT_MIN_ZOOM*2) ) | |
596 | { | |
597 | vvp->xmpp /= 2; | |
598 | vvp->ympp /= 2; | |
599 | ||
50a14534 EB |
600 | viewport_utm_zone_check(vvp); |
601 | } | |
602 | } | |
603 | ||
604 | void vik_viewport_zoom_out ( VikViewport *vvp ) | |
605 | { | |
606 | g_return_if_fail ( vvp != NULL ); | |
607 | if ( vvp->xmpp <= (VIK_VIEWPORT_MAX_ZOOM/2) && vvp->ympp <= (VIK_VIEWPORT_MAX_ZOOM/2) ) | |
608 | { | |
609 | vvp->xmpp *= 2; | |
610 | vvp->ympp *= 2; | |
611 | ||
50a14534 EB |
612 | viewport_utm_zone_check(vvp); |
613 | } | |
614 | } | |
615 | ||
616 | gdouble vik_viewport_get_zoom ( VikViewport *vvp ) | |
617 | { | |
618 | if ( vvp->xmpp == vvp->ympp ) | |
619 | return vvp->xmpp; | |
620 | return 0.0; | |
621 | } | |
622 | ||
623 | gdouble vik_viewport_get_xmpp ( VikViewport *vvp ) | |
624 | { | |
625 | return vvp->xmpp; | |
626 | } | |
627 | ||
628 | gdouble vik_viewport_get_ympp ( VikViewport *vvp ) | |
629 | { | |
630 | return vvp->ympp; | |
631 | } | |
632 | ||
633 | void vik_viewport_set_xmpp ( VikViewport *vvp, gdouble xmpp ) | |
634 | { | |
635 | if ( xmpp >= VIK_VIEWPORT_MIN_ZOOM && xmpp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
636 | vvp->xmpp = xmpp; | |
637 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
638 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
639 | } |
640 | } | |
641 | ||
642 | void vik_viewport_set_ympp ( VikViewport *vvp, gdouble ympp ) | |
643 | { | |
644 | if ( ympp >= VIK_VIEWPORT_MIN_ZOOM && ympp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
645 | vvp->ympp = ympp; | |
646 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
647 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
648 | } |
649 | } | |
650 | ||
651 | ||
652 | const VikCoord *vik_viewport_get_center ( VikViewport *vvp ) | |
653 | { | |
654 | g_return_val_if_fail ( vvp != NULL, NULL ); | |
655 | return &(vvp->center); | |
656 | } | |
657 | ||
658 | /* called every time we update coordinates/zoom */ | |
659 | static void viewport_utm_zone_check ( VikViewport *vvp ) | |
660 | { | |
661 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
662 | { | |
663 | struct UTM utm; | |
664 | struct LatLon ll; | |
665 | a_coords_utm_to_latlon ( (struct UTM *) &(vvp->center), &ll ); | |
666 | a_coords_latlon_to_utm ( &ll, &utm ); | |
667 | if ( utm.zone != vvp->center.utm_zone ) | |
668 | *((struct UTM *)(&vvp->center)) = utm; | |
669 | ||
670 | /* misc. stuff so we don't have to check later */ | |
671 | vvp->utm_zone_width = viewport_utm_zone_width ( vvp ); | |
672 | vvp->one_utm_zone = ( vik_viewport_rightmost_zone(vvp) == vik_viewport_leftmost_zone(vvp) ); | |
673 | } | |
674 | } | |
675 | ||
676 | void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll ) | |
677 | { | |
678 | vik_coord_load_from_latlon ( &(vvp->center), vvp->coord_mode, ll ); | |
679 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
680 | viewport_utm_zone_check ( vvp ); | |
681 | } | |
682 | ||
683 | void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm ) | |
684 | { | |
685 | vik_coord_load_from_utm ( &(vvp->center), vvp->coord_mode, utm ); | |
686 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
687 | viewport_utm_zone_check ( vvp ); | |
688 | } | |
689 | ||
690 | void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord ) | |
691 | { | |
692 | vvp->center = *coord; | |
693 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
694 | viewport_utm_zone_check ( vvp ); | |
695 | } | |
696 | ||
697 | void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br ) | |
698 | { | |
699 | g_return_if_fail ( vvp->coord_mode == VIK_COORD_UTM ); | |
700 | ||
701 | /* get center, then just offset */ | |
702 | vik_viewport_center_for_zonen ( vvp, VIK_UTM(ul), zone ); | |
703 | ul->mode = VIK_COORD_UTM; | |
704 | *br = *ul; | |
705 | ||
706 | ul->north_south += (vvp->ympp * vvp->height / 2); | |
707 | ul->east_west -= (vvp->xmpp * vvp->width / 2); | |
708 | br->north_south -= (vvp->ympp * vvp->height / 2); | |
709 | br->east_west += (vvp->xmpp * vvp->width / 2); | |
710 | } | |
711 | ||
712 | void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone) | |
713 | { | |
714 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
715 | *center = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
716 | center->easting -= ( zone - center->zone ) * vvp->utm_zone_width; | |
717 | center->zone = zone; | |
718 | } | |
719 | } | |
720 | ||
721 | gchar vik_viewport_leftmost_zone ( VikViewport *vvp ) | |
722 | { | |
723 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
724 | VikCoord coord; | |
725 | g_assert ( vvp != NULL ); | |
726 | vik_viewport_screen_to_coord ( vvp, 0, 0, &coord ); | |
727 | return coord.utm_zone; | |
728 | } | |
729 | return '\0'; | |
730 | } | |
731 | ||
732 | gchar vik_viewport_rightmost_zone ( VikViewport *vvp ) | |
733 | { | |
734 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
735 | VikCoord coord; | |
736 | g_assert ( vvp != NULL ); | |
737 | vik_viewport_screen_to_coord ( vvp, vvp->width, 0, &coord ); | |
738 | return coord.utm_zone; | |
739 | } | |
740 | return '\0'; | |
741 | } | |
742 | ||
743 | ||
744 | void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y ) | |
745 | { | |
746 | g_return_if_fail ( vvp != NULL ); | |
747 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
748 | /* slightly optimized */ | |
749 | vvp->center.east_west += vvp->xmpp * (x - (vvp->width/2)); | |
750 | vvp->center.north_south += vvp->ympp * ((vvp->height/2) - y); | |
751 | viewport_utm_zone_check ( vvp ); | |
752 | } else { | |
753 | VikCoord tmp; | |
754 | vik_viewport_screen_to_coord ( vvp, x, y, &tmp ); | |
755 | vik_viewport_set_center_coord ( vvp, &tmp ); | |
756 | } | |
757 | } | |
758 | ||
759 | gint vik_viewport_get_width( VikViewport *vvp ) | |
760 | { | |
761 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
762 | return vvp->width; | |
763 | } | |
764 | ||
765 | gint vik_viewport_get_height( VikViewport *vvp ) | |
766 | { | |
767 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
768 | return vvp->height; | |
769 | } | |
770 | ||
771 | void vik_viewport_screen_to_coord ( VikViewport *vvp, int x, int y, VikCoord *coord ) | |
772 | { | |
c53eda9a GB |
773 | g_return_if_fail ( vvp != NULL ); |
774 | ||
50a14534 EB |
775 | if ( vvp->coord_mode == VIK_COORD_UTM ) { |
776 | int zone_delta; | |
777 | struct UTM *utm = (struct UTM *) coord; | |
778 | coord->mode = VIK_COORD_UTM; | |
779 | ||
50a14534 EB |
780 | utm->zone = vvp->center.utm_zone; |
781 | utm->letter = vvp->center.utm_letter; | |
782 | utm->easting = ( ( x - ( vvp->width / 2) ) * vvp->xmpp ) + vvp->center.east_west; | |
783 | zone_delta = floor( (utm->easting - EASTING_OFFSET ) / vvp->utm_zone_width + 0.5 ); | |
784 | utm->zone += zone_delta; | |
785 | utm->easting -= zone_delta * vvp->utm_zone_width; | |
786 | utm->northing = ( ( ( vvp->height / 2) - y ) * vvp->ympp ) + vvp->center.north_south; | |
787 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
788 | coord->mode = VIK_COORD_LATLON; | |
d587678a GB |
789 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
790 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
791 | coord->north_south = vvp->center.north_south + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)); | |
792 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) | |
50a14534 | 793 | 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 | 794 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
50a14534 EB |
795 | /* FIXMERCATOR */ |
796 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width/2)); | |
797 | coord->north_south = DEMERCLAT ( MERCLAT(vvp->center.north_south) + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) ); | |
798 | ||
799 | #if 0 | |
800 | --> THIS IS JUNK HERE. | |
801 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
802 | ||
803 | (*y - vvp->height/2) / 256 / 65536 * 180 * vvp->ympp = (MERCLAT(center->lat) - MERCLAT(ll->lat); | |
804 | DML((180.0 * vvp->ympp / 65536 / 256 * (vvp->height/2 - y)) + ML(cl)) = ll | |
805 | #endif | |
806 | } | |
807 | } | |
808 | } | |
809 | ||
810 | void vik_viewport_coord_to_screen ( VikViewport *vvp, const VikCoord *coord, int *x, int *y ) | |
811 | { | |
812 | static VikCoord tmp; | |
813 | g_return_if_fail ( vvp != NULL ); | |
814 | ||
815 | if ( coord->mode != vvp->coord_mode ) | |
816 | { | |
817 | g_warning ( "Have to convert in vik_viewport_coord_to_screen! This should never happen!"); | |
818 | vik_coord_copy_convert ( coord, vvp->coord_mode, &tmp ); | |
819 | coord = &tmp; | |
820 | } | |
821 | ||
822 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
823 | struct UTM *center = (struct UTM *) &(vvp->center); | |
824 | struct UTM *utm = (struct UTM *) coord; | |
825 | if ( center->zone != utm->zone && vvp->one_utm_zone ) | |
826 | { | |
827 | *x = *y = VIK_VIEWPORT_UTM_WRONG_ZONE; | |
828 | return; | |
829 | } | |
830 | ||
831 | *x = ( (utm->easting - center->easting) / vvp->xmpp ) + (vvp->width / 2) - | |
832 | (center->zone - utm->zone ) * vvp->utm_zone_width / vvp->xmpp; | |
833 | *y = (vvp->height / 2) - ( (utm->northing - center->northing) / vvp->ympp ); | |
834 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { | |
835 | struct LatLon *center = (struct LatLon *) &(vvp->center); | |
836 | struct LatLon *ll = (struct LatLon *) coord; | |
837 | double xx,yy; | |
d587678a GB |
838 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
839 | /* FIXMERCATOR: Optimize */ | |
840 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
841 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (center->lat - ll->lat))*256.0; | |
842 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) { | |
50a14534 EB |
843 | 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 ); |
844 | *x = xx; *y = yy; | |
50a14534 EB |
845 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
846 | /* FIXMERCATOR: Optimize */ | |
847 | *x = vvp->width/2 + (65536.0 / 180 / vvp->xmpp * (ll->lon - center->lon))*256.0; | |
848 | *y = vvp->height/2 + (65536.0 / 180 / vvp->ympp * (MERCLAT(center->lat) - MERCLAT(ll->lat)))*256.0; | |
849 | } | |
850 | } | |
851 | } | |
852 | ||
d9ffd267 EB |
853 | void a_viewport_clip_line ( gint *x1, gint *y1, gint *x2, gint *y2 ) |
854 | { | |
855 | if ( *x1 > 20000 || *x1 < -20000 ) { | |
856 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
857 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
858 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
859 | } else if ( *y1 > 20000 || *y1 < -20000 ) { | |
860 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
861 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
862 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
863 | } else if ( *x2 > 20000 || *x2 < -20000 ) { | |
864 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
865 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
866 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
37614d9e | 867 | g_print("%f, %d, %d\n", shrinkfactor, *x2, *y2); |
d9ffd267 EB |
868 | } else if ( *y2 > 20000 || *y2 < -20000 ) { |
869 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
870 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
871 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
872 | } | |
873 | } | |
874 | ||
50a14534 EB |
875 | void vik_viewport_draw_line ( VikViewport *vvp, GdkGC *gc, gint x1, gint y1, gint x2, gint y2 ) |
876 | { | |
877 | if ( ! ( ( x1 < 0 && x2 < 0 ) || ( y1 < 0 && y2 < 0 ) || | |
d9ffd267 EB |
878 | ( x1 > vvp->width && x2 > vvp->width ) || ( y1 > vvp->height && y2 > vvp->height ) ) ) { |
879 | /*** clipping, yeah! ***/ | |
880 | a_viewport_clip_line ( &x1, &y1, &x2, &y2 ); | |
881 | gdk_draw_line ( vvp->scr_buffer, gc, x1, y1, x2, y2); | |
882 | } | |
50a14534 EB |
883 | } |
884 | ||
885 | void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 ) | |
886 | { | |
887 | if ( x1 > -10 && x1 < vvp->width + 10 && y1 > -10 && y1 < vvp->height + 10 ) | |
888 | gdk_draw_rectangle ( vvp->scr_buffer, gc, filled, x1, y1, x2, y2); | |
889 | } | |
890 | ||
891 | void vik_viewport_draw_string ( VikViewport *vvp, GdkFont *font, GdkGC *gc, gint x1, gint y1, const gchar *string ) | |
892 | { | |
893 | if ( x1 > -100 && x1 < vvp->width + 100 && y1 > -100 && y1 < vvp->height + 100 ) | |
894 | gdk_draw_string ( vvp->scr_buffer, font, gc, x1, y1, string ); | |
895 | } | |
896 | ||
897 | /* shouldn't use this -- slow -- change the alpha channel instead. */ | |
898 | void vik_viewport_draw_pixbuf_with_alpha ( VikViewport *vvp, GdkPixbuf *pixbuf, gint alpha, | |
899 | gint src_x, gint src_y, gint dest_x, gint dest_y, gint w, gint h ) | |
900 | { | |
901 | gint real_dest_x = MAX(dest_x,0); | |
902 | gint real_dest_y = MAX(dest_y,0); | |
903 | ||
904 | if ( alpha == 0 ) | |
905 | return; /* don't waste your time */ | |
906 | ||
907 | if ( w > vvp->alpha_pixbuf_width || h > vvp->alpha_pixbuf_height ) | |
908 | { | |
909 | if ( vvp->alpha_pixbuf ) | |
910 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
911 | vvp->alpha_pixbuf_width = MAX(w,vvp->alpha_pixbuf_width); | |
912 | vvp->alpha_pixbuf_height = MAX(h,vvp->alpha_pixbuf_height); | |
913 | vvp->alpha_pixbuf = gdk_pixbuf_new ( GDK_COLORSPACE_RGB, FALSE, 8, vvp->alpha_pixbuf_width, vvp->alpha_pixbuf_height ); | |
914 | } | |
915 | ||
916 | w = MIN(w,vvp->width - dest_x); | |
917 | h = MIN(h,vvp->height - dest_y); | |
918 | ||
919 | /* check that we are drawing within boundaries. */ | |
920 | src_x += (real_dest_x - dest_x); | |
921 | src_y += (real_dest_y - dest_y); | |
922 | w -= (real_dest_x - dest_x); | |
923 | h -= (real_dest_y - dest_y); | |
924 | ||
925 | gdk_pixbuf_get_from_drawable ( vvp->alpha_pixbuf, vvp->scr_buffer, NULL, | |
926 | real_dest_x, real_dest_y, 0, 0, w, h ); | |
927 | ||
928 | /* do a composite */ | |
929 | gdk_pixbuf_composite ( pixbuf, vvp->alpha_pixbuf, 0, 0, w, h, -src_x, -src_y, 1, 1, 0, alpha ); | |
930 | ||
931 | /* draw pixbuf_tmp */ | |
932 | vik_viewport_draw_pixbuf ( vvp, vvp->alpha_pixbuf, 0, 0, real_dest_x, real_dest_y, w, h ); | |
933 | } | |
934 | ||
935 | void vik_viewport_draw_pixbuf ( VikViewport *vvp, GdkPixbuf *pixbuf, gint src_x, gint src_y, | |
936 | gint dest_x, gint dest_y, gint w, gint h ) | |
937 | { | |
938 | gdk_draw_pixbuf ( vvp->scr_buffer, | |
939 | // GTK_WIDGET(vvp)->style->black_gc, | |
940 | NULL, | |
941 | pixbuf, | |
942 | src_x, src_y, dest_x, dest_y, w, h, | |
943 | GDK_RGB_DITHER_NONE, 0, 0 ); | |
944 | } | |
945 | ||
946 | void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2 ) | |
947 | { | |
948 | gdk_draw_arc ( vvp->scr_buffer, gc, filled, x, y, width, height, angle1, angle2 ); | |
949 | } | |
950 | ||
951 | ||
952 | void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints ) | |
953 | { | |
954 | gdk_draw_polygon ( vvp->scr_buffer, gc, filled, points, npoints ); | |
955 | } | |
956 | ||
957 | VikCoordMode vik_viewport_get_coord_mode ( const VikViewport *vvp ) | |
958 | { | |
959 | g_assert ( vvp ); | |
960 | return vvp->coord_mode; | |
961 | } | |
962 | ||
963 | static void viewport_set_coord_mode ( VikViewport *vvp, VikCoordMode mode ) | |
964 | { | |
965 | g_return_if_fail ( vvp != NULL ); | |
966 | vvp->coord_mode = mode; | |
967 | vik_coord_convert ( &(vvp->center), mode ); | |
968 | } | |
969 | ||
970 | /* Thanks GPSDrive */ | |
971 | 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 ) | |
972 | { | |
973 | int px, py; | |
974 | gdouble dif, lat, lon; | |
975 | double Ra = Radius[90+(gint)zero_lat]; | |
976 | ||
977 | px = (mapSizeX2 - x) * pixelfact_x; | |
978 | py = (-mapSizeY2 + y) * pixelfact_y; | |
979 | ||
980 | lat = zero_lat - py / Ra; | |
981 | lat = zero_lat - py / Ra; | |
982 | lon = | |
983 | zero_long - | |
984 | px / (Ra * | |
985 | cos (lat * DEG2RAD)); | |
986 | ||
987 | dif = lat * (1 - (cos ((fabs (lon - zero_long)) * DEG2RAD))); | |
988 | lat = lat - dif / 1.5; | |
989 | lon = | |
990 | zero_long - | |
991 | px / (Ra * | |
992 | cos (lat * DEG2RAD)); | |
993 | ||
994 | *lt = lat; | |
995 | *lg = lon; | |
996 | return (TRUE); | |
997 | } | |
998 | ||
999 | /* Thanks GPSDrive */ | |
1000 | 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 ) | |
1001 | { | |
1002 | double dif; | |
1003 | double Ra; | |
1004 | gint mapSizeX = 2 * mapSizeX2; | |
1005 | gint mapSizeY = 2 * mapSizeY2; | |
1006 | ||
1007 | g_assert ( lt >= -90.0 && lt <= 90.0 ); | |
1008 | // lg *= rad2deg; // FIXME, optimize equations | |
1009 | // lt *= rad2deg; | |
1010 | Ra = Radius[90+(gint)lt]; | |
1011 | *x = Ra * | |
1012 | cos (lt*DEG2RAD) * (lg - zero_long); | |
1013 | *y = Ra * (lt - zero_lat); | |
1014 | dif = Ra * RAD2DEG * (1 - (cos ((DEG2RAD * (lg - zero_long))))); | |
1015 | *y = *y + dif / 1.85; | |
1016 | *x = *x / pixelfact_x; | |
1017 | *y = *y / pixelfact_y; | |
1018 | *x = mapSizeX2 - *x; | |
1019 | *y += mapSizeY2; | |
1020 | if ((*x < 0)||(*x >= mapSizeX)||(*y < 0)||(*y >= mapSizeY)) | |
1021 | return (FALSE); | |
1022 | return (TRUE); | |
1023 | } | |
1024 | ||
1025 | static void viewport_init_ra() | |
1026 | { | |
1027 | static gboolean done_before = FALSE; | |
1028 | if ( !done_before ) | |
1029 | { | |
1030 | gint i; | |
1031 | for ( i = -90; i <= 90; i++) | |
1032 | Radius[i+90] = calcR ( (double)i ) * DEG2RAD; | |
1033 | done_before = TRUE; | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | double calcR (double lat) | |
1038 | { | |
1039 | double a = 6378.137, r, sc, x, y, z; | |
1040 | double e2 = 0.081082 * 0.081082; | |
1041 | /* | |
1042 | * the radius of curvature of an ellipsoidal Earth in the plane of the | |
1043 | * meridian is given by | |
1044 | * | |
1045 | * R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2) | |
1046 | * | |
1047 | * | |
1048 | * where a is the equatorial radius, b is the polar radius, and e is | |
1049 | * the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2) | |
1050 | * | |
1051 | * a = 6378 km (3963 mi) Equatorial radius (surface to center distance) | |
1052 | * b = 6356.752 km (3950 mi) Polar radius (surface to center distance) e | |
1053 | * = 0.081082 Eccentricity | |
1054 | */ | |
1055 | ||
1056 | lat = lat * DEG2RAD; | |
1057 | sc = sin (lat); | |
1058 | x = a * (1.0 - e2); | |
1059 | z = 1.0 - e2 * sc * sc; | |
1060 | y = pow (z, 1.5); | |
1061 | r = x / y; | |
1062 | r = r * 1000.0; | |
1063 | return r; | |
1064 | } | |
1065 | ||
1066 | gboolean vik_viewport_is_one_zone ( VikViewport *vvp ) | |
1067 | { | |
1068 | return vvp->coord_mode == VIK_COORD_UTM && vvp->one_utm_zone; | |
1069 | } | |
1070 | ||
1071 | void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout ) | |
1072 | { | |
1073 | if ( x > -100 && x < vvp->width + 100 && y > -100 && y < vvp->height + 100 ) | |
1074 | gdk_draw_layout ( vvp->scr_buffer, gc, x, y, layout ); | |
1075 | } | |
1076 | ||
1077 | void vik_gc_get_fg_color ( GdkGC *gc, GdkColor *dest ) | |
1078 | { | |
1079 | static GdkGCValues values; | |
1080 | gdk_gc_get_values ( gc, &values ); | |
1081 | gdk_colormap_query_color ( gdk_colormap_get_system(), values.foreground.pixel, dest ); | |
1082 | } | |
1083 | ||
1084 | GdkFunction vik_gc_get_function ( GdkGC *gc ) | |
1085 | { | |
1086 | static GdkGCValues values; | |
1087 | gdk_gc_get_values ( gc, &values ); | |
1088 | return values.function; | |
1089 | } | |
1090 | ||
1091 | void vik_viewport_set_drawmode ( VikViewport *vvp, VikViewportDrawMode drawmode ) | |
1092 | { | |
1093 | vvp->drawmode = drawmode; | |
1094 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
1095 | viewport_set_coord_mode ( vvp, VIK_COORD_UTM ); | |
1096 | else { | |
1097 | viewport_set_coord_mode ( vvp, VIK_COORD_LATLON ); | |
50a14534 EB |
1098 | } |
1099 | } | |
1100 | ||
1101 | VikViewportDrawMode vik_viewport_get_drawmode ( VikViewport *vvp ) | |
1102 | { | |
1103 | return vvp->drawmode; | |
1104 | } | |
1105 | ||
0df66d57 EB |
1106 | /******** triggering *******/ |
1107 | void vik_viewport_set_trigger ( VikViewport *vp, gpointer trigger ) | |
1108 | { | |
1109 | vp->trigger = trigger; | |
1110 | } | |
1111 | ||
1112 | gpointer vik_viewport_get_trigger ( VikViewport *vp ) | |
1113 | { | |
1114 | return vp->trigger; | |
1115 | } | |
1116 | ||
1117 | void vik_viewport_snapshot_save ( VikViewport *vp ) | |
1118 | { | |
1119 | gdk_draw_drawable ( vp->snapshot_buffer, vp->background_gc, vp->scr_buffer, 0, 0, 0, 0, -1, -1 ); | |
1120 | } | |
1121 | ||
1122 | void vik_viewport_snapshot_load ( VikViewport *vp ) | |
1123 | { | |
1124 | gdk_draw_drawable ( vp->scr_buffer, vp->background_gc, vp->snapshot_buffer, 0, 0, 0, 0, -1, -1 ); | |
1125 | } | |
1126 | ||
1127 | void vik_viewport_set_half_drawn(VikViewport *vp, gboolean half_drawn) | |
1128 | { | |
1129 | vp->half_drawn = half_drawn; | |
1130 | } | |
1131 | ||
1132 | gboolean vik_viewport_get_half_drawn( VikViewport *vp ) | |
1133 | { | |
1134 | return vp->half_drawn; | |
1135 | } | |
1136 | ||
7bc965c0 GB |
1137 | |
1138 | const gchar *vik_viewport_get_drawmode_name(VikViewport *vv, VikViewportDrawMode mode) | |
0c1044e9 | 1139 | { |
7bc965c0 | 1140 | const gchar *name = NULL; |
24277274 | 1141 | VikWindow *vw = NULL; |
7bc965c0 GB |
1142 | GtkWidget *mode_button; |
1143 | GtkWidget *label; | |
24277274 GB |
1144 | |
1145 | vw = VIK_WINDOW_FROM_WIDGET(vv); | |
1146 | mode_button = vik_window_get_drawmode_button(vw, mode); | |
7bc965c0 GB |
1147 | label = gtk_bin_get_child(GTK_BIN(mode_button)); |
1148 | ||
1149 | name = gtk_label_get_text ( GTK_LABEL(label) ); | |
314c1ccc | 1150 | |
7bc965c0 | 1151 | return name; |
314c1ccc QT |
1152 | |
1153 | } | |
7bc965c0 | 1154 | |
0c1044e9 EB |
1155 | void vik_viewport_get_min_max_lat_lon ( VikViewport *vp, gdouble *min_lat, gdouble *max_lat, gdouble *min_lon, gdouble *max_lon ) |
1156 | { | |
1157 | VikCoord tleft, tright, bleft, bright; | |
1158 | ||
1159 | vik_viewport_screen_to_coord ( vp, 0, 0, &tleft ); | |
1160 | vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright ); | |
1161 | vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft ); | |
1162 | vik_viewport_screen_to_coord ( vp, vp->width, vp->height, &bright ); | |
7bc965c0 | 1163 | |
0c1044e9 EB |
1164 | vik_coord_convert(&tleft, VIK_COORD_LATLON); |
1165 | vik_coord_convert(&tright, VIK_COORD_LATLON); | |
1166 | vik_coord_convert(&bleft, VIK_COORD_LATLON); | |
1167 | vik_coord_convert(&bright, VIK_COORD_LATLON); | |
1168 | ||
1169 | *max_lat = MAX(tleft.north_south, tright.north_south); | |
1170 | *min_lat = MIN(bleft.north_south, bright.north_south); | |
1171 | *max_lon = MAX(tright.east_west, bright.east_west); | |
1172 | *min_lon = MIN(tleft.east_west, bleft.east_west); | |
1173 | } | |
82aa018d GB |
1174 | |
1175 | void vik_viewport_reset_copyrights ( VikViewport *vp ) | |
1176 | { | |
1177 | g_return_if_fail ( vp != NULL ); | |
1178 | g_slist_foreach ( vp->copyrights, (GFunc)g_free, NULL ); | |
1179 | g_slist_free ( vp->copyrights ); | |
1180 | vp->copyrights = NULL; | |
1181 | } | |
1182 | ||
1183 | void vik_viewport_add_copyright ( VikViewport *vp, const gchar *copyright ) | |
1184 | { | |
1185 | g_return_if_fail ( vp != NULL ); | |
1186 | if ( copyright ) | |
1187 | { | |
1188 | gchar *found = (gchar*)g_slist_find_custom ( vp->copyrights, copyright, (GCompareFunc)strcmp ); | |
1189 | if ( found == NULL ) | |
1190 | { | |
1191 | gchar *duple = g_strdup ( copyright ); | |
1192 | vp->copyrights = g_slist_prepend ( vp->copyrights, duple ); | |
1193 | } | |
1194 | } | |
1195 | } |