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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 | 45 | #include "vikviewport.h" |
50a14534 EB |
46 | #include "mapcoord.h" |
47 | ||
48 | /* for ALTI_TO_MPP */ | |
49 | #include "globals.h" | |
7143d1e4 | 50 | #include "settings.h" |
50a14534 | 51 | |
a3603298 RN |
52 | #define MERCATOR_FACTOR(x) ( (65536.0 / 180 / (x)) * 256.0 ) |
53 | ||
50a14534 EB |
54 | static gdouble EASTING_OFFSET = 500000.0; |
55 | ||
26336cf0 GB |
56 | static gint PAD = 10; |
57 | ||
50a14534 EB |
58 | static void viewport_finalize ( GObject *gob ); |
59 | static void viewport_utm_zone_check ( VikViewport *vvp ); | |
60 | ||
61 | 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 ); | |
62 | 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 ); | |
63 | double calcR (double lat); | |
64 | ||
65 | static double Radius[181]; | |
66 | static void viewport_init_ra(); | |
67 | ||
68 | static GObjectClass *parent_class; | |
69 | ||
50a14534 EB |
70 | |
71 | struct _VikViewport { | |
72 | GtkDrawingArea drawing_area; | |
73 | GdkPixmap *scr_buffer; | |
74 | gint width, height; | |
a3603298 | 75 | gint width_2, height_2; // Half of the normal width and height |
50a14534 EB |
76 | VikCoord center; |
77 | VikCoordMode coord_mode; | |
78 | gdouble xmpp, ympp; | |
a3603298 | 79 | gdouble xmfactor, ymfactor; |
50a14534 EB |
80 | |
81 | GdkPixbuf *alpha_pixbuf; | |
82 | guint8 alpha_pixbuf_width; | |
83 | guint8 alpha_pixbuf_height; | |
84 | ||
85 | gdouble utm_zone_width; | |
86 | gboolean one_utm_zone; | |
87 | ||
88 | GdkGC *background_gc; | |
89 | GdkColor background_color; | |
4e485bf3 | 90 | GdkGC *scale_bg_gc; |
82aa018d GB |
91 | |
92 | GSList *copyrights; | |
26336cf0 | 93 | GSList *logos; |
82aa018d GB |
94 | |
95 | /* Wether or not display OSD info */ | |
35c7c0ba | 96 | gboolean draw_scale; |
c933487f | 97 | gboolean draw_centermark; |
2afcef36 | 98 | gboolean draw_highlight; |
480fb7e1 RN |
99 | GdkGC *highlight_gc; |
100 | GdkColor highlight_color; | |
50a14534 EB |
101 | |
102 | /* subset of coord types. lat lon can be plotted in 2 ways, google or exp. */ | |
103 | VikViewportDrawMode drawmode; | |
104 | ||
0df66d57 EB |
105 | /* trigger stuff */ |
106 | gpointer trigger; | |
107 | GdkPixmap *snapshot_buffer; | |
108 | gboolean half_drawn; | |
50a14534 EB |
109 | }; |
110 | ||
111 | static gdouble | |
112 | viewport_utm_zone_width ( VikViewport *vvp ) | |
113 | { | |
114 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
115 | struct LatLon ll; | |
116 | ||
117 | /* get latitude of screen bottom */ | |
118 | struct UTM utm = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
119 | utm.northing -= vvp -> height * vvp -> ympp / 2; | |
120 | a_coords_utm_to_latlon ( &utm, &ll ); | |
121 | ||
122 | /* boundary */ | |
123 | ll.lon = (utm.zone - 1) * 6 - 180 ; | |
124 | a_coords_latlon_to_utm ( &ll, &utm); | |
125 | return fabs ( utm.easting - EASTING_OFFSET ) * 2; | |
126 | } else | |
127 | return 0.0; | |
128 | } | |
129 | ||
eb560cd6 | 130 | G_DEFINE_TYPE (VikViewport, vik_viewport, GTK_TYPE_DRAWING_AREA) |
50a14534 | 131 | |
eb560cd6 GB |
132 | static void |
133 | vik_viewport_class_init ( VikViewportClass *klass ) | |
50a14534 EB |
134 | { |
135 | /* Destructor */ | |
136 | GObjectClass *object_class; | |
137 | ||
138 | object_class = G_OBJECT_CLASS (klass); | |
139 | ||
140 | object_class->finalize = viewport_finalize; | |
141 | ||
142 | parent_class = g_type_class_peek_parent (klass); | |
143 | } | |
144 | ||
24277274 | 145 | VikViewport *vik_viewport_new () |
50a14534 | 146 | { |
a59e6eb9 | 147 | VikViewport *vv = VIK_VIEWPORT ( g_object_new ( VIK_VIEWPORT_TYPE, NULL ) ); |
a59e6eb9 | 148 | return vv; |
50a14534 EB |
149 | } |
150 | ||
7143d1e4 RN |
151 | #define VIK_SETTINGS_VIEW_LAST_LATITUDE "viewport_last_latitude" |
152 | #define VIK_SETTINGS_VIEW_LAST_LONGITUDE "viewport_last_longitude" | |
153 | #define VIK_SETTINGS_VIEW_LAST_ZOOM_X "viewport_last_zoom_xpp" | |
154 | #define VIK_SETTINGS_VIEW_LAST_ZOOM_Y "viewport_last_zoom_ypp" | |
155 | ||
eb560cd6 GB |
156 | static void |
157 | vik_viewport_init ( VikViewport *vvp ) | |
50a14534 EB |
158 | { |
159 | viewport_init_ra(); | |
160 | ||
5210c3d3 GB |
161 | struct UTM utm; |
162 | struct LatLon ll; | |
163 | ll.lat = a_vik_get_default_lat(); | |
164 | ll.lon = a_vik_get_default_long(); | |
7143d1e4 RN |
165 | gdouble zoom_x = 4.0; |
166 | gdouble zoom_y = 4.0; | |
167 | ||
168 | if ( a_vik_get_startup_method ( ) == VIK_STARTUP_METHOD_LAST_LOCATION ) { | |
169 | gdouble lat, lon, dzoom; | |
170 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_LATITUDE, &lat ) ) | |
171 | ll.lat = lat; | |
172 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_LONGITUDE, &lon ) ) | |
173 | ll.lon = lon; | |
174 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_X, &dzoom ) ) | |
175 | zoom_x = dzoom; | |
176 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_Y, &dzoom ) ) | |
177 | zoom_y = dzoom; | |
178 | } | |
179 | ||
5210c3d3 GB |
180 | a_coords_latlon_to_utm ( &ll, &utm ); |
181 | ||
7143d1e4 RN |
182 | vvp->xmpp = zoom_x; |
183 | vvp->ympp = zoom_y; | |
a3603298 RN |
184 | vvp->xmfactor = MERCATOR_FACTOR (vvp->xmpp); |
185 | vvp->ymfactor = MERCATOR_FACTOR (vvp->ympp); | |
6a9ff0ee QT |
186 | vvp->coord_mode = VIK_COORD_LATLON; |
187 | vvp->drawmode = VIK_VIEWPORT_DRAWMODE_MERCATOR; | |
ee180665 | 188 | vvp->center.mode = VIK_COORD_LATLON; |
5210c3d3 GB |
189 | vvp->center.north_south = ll.lat; |
190 | vvp->center.east_west = ll.lon; | |
191 | vvp->center.utm_zone = (int)utm.zone; | |
192 | vvp->center.utm_letter = utm.letter; | |
50a14534 EB |
193 | vvp->scr_buffer = NULL; |
194 | vvp->alpha_pixbuf = NULL; | |
195 | vvp->alpha_pixbuf_width = vvp->alpha_pixbuf_height = 0; | |
196 | vvp->utm_zone_width = 0.0; | |
197 | vvp->background_gc = NULL; | |
480fb7e1 | 198 | vvp->highlight_gc = NULL; |
4e485bf3 | 199 | vvp->scale_bg_gc = NULL; |
82aa018d GB |
200 | |
201 | vvp->copyrights = NULL; | |
202 | ||
35c7c0ba | 203 | vvp->draw_scale = TRUE; |
c933487f | 204 | vvp->draw_centermark = TRUE; |
2afcef36 | 205 | vvp->draw_highlight = TRUE; |
0df66d57 EB |
206 | |
207 | vvp->trigger = NULL; | |
208 | vvp->snapshot_buffer = NULL; | |
209 | vvp->half_drawn = FALSE; | |
210 | ||
50a14534 | 211 | g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL); |
165d30aa | 212 | |
2fd7c35e RN |
213 | #if GTK_CHECK_VERSION (2,18,0) |
214 | gtk_widget_set_can_focus ( GTK_WIDGET(vvp), TRUE ); | |
215 | #else | |
165d30aa | 216 | GTK_WIDGET_SET_FLAGS(vvp, GTK_CAN_FOCUS); /* allow VVP to have focus -- enabling key events, etc */ |
2fd7c35e | 217 | #endif |
50a14534 EB |
218 | } |
219 | ||
220 | GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp ) | |
221 | { | |
222 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
223 | *rv = vvp->background_color; | |
224 | return rv; | |
225 | } | |
226 | ||
227 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
228 | const gchar *vik_viewport_get_background_color ( VikViewport *vvp ) | |
229 | { | |
230 | static gchar color[8]; | |
231 | 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)); | |
232 | return color; | |
233 | } | |
234 | ||
235 | void vik_viewport_set_background_color ( VikViewport *vvp, const gchar *colorname ) | |
236 | { | |
52aa15a7 | 237 | g_assert ( vvp && vvp->background_gc ); |
b244bc6a GB |
238 | if ( gdk_color_parse ( colorname, &(vvp->background_color) ) ) |
239 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, &(vvp->background_color) ); | |
240 | else | |
241 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
242 | } |
243 | ||
244 | void vik_viewport_set_background_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
245 | { | |
52aa15a7 | 246 | g_assert ( vvp && vvp->background_gc ); |
50a14534 EB |
247 | vvp->background_color = *color; |
248 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, color ); | |
249 | } | |
250 | ||
480fb7e1 RN |
251 | GdkColor *vik_viewport_get_highlight_gdkcolor ( VikViewport *vvp ) |
252 | { | |
253 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
254 | *rv = vvp->highlight_color; | |
255 | return rv; | |
256 | } | |
257 | ||
258 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
259 | const gchar *vik_viewport_get_highlight_color ( VikViewport *vvp ) | |
260 | { | |
261 | static gchar color[8]; | |
262 | 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)); | |
263 | return color; | |
264 | } | |
265 | ||
266 | void vik_viewport_set_highlight_color ( VikViewport *vvp, const gchar *colorname ) | |
267 | { | |
268 | g_assert ( vvp->highlight_gc ); | |
269 | gdk_color_parse ( colorname, &(vvp->highlight_color) ); | |
270 | gdk_gc_set_rgb_fg_color ( vvp->highlight_gc, &(vvp->highlight_color) ); | |
271 | } | |
272 | ||
273 | void vik_viewport_set_highlight_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
274 | { | |
275 | g_assert ( vvp->highlight_gc ); | |
276 | vvp->highlight_color = *color; | |
277 | gdk_gc_set_rgb_fg_color ( vvp->highlight_gc, color ); | |
278 | } | |
279 | ||
280 | GdkGC *vik_viewport_get_gc_highlight ( VikViewport *vvp ) | |
281 | { | |
282 | return vvp->highlight_gc; | |
283 | } | |
50a14534 | 284 | |
04f36d92 RN |
285 | void vik_viewport_set_highlight_thickness ( VikViewport *vvp, gint thickness ) |
286 | { | |
287 | // Otherwise same GDK_* attributes as in vik_viewport_new_gc | |
288 | gdk_gc_set_line_attributes ( vvp->highlight_gc, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
289 | } | |
290 | ||
50a14534 EB |
291 | GdkGC *vik_viewport_new_gc ( VikViewport *vvp, const gchar *colorname, gint thickness ) |
292 | { | |
b244bc6a | 293 | GdkGC *rv = NULL; |
50a14534 EB |
294 | GdkColor color; |
295 | ||
9b082b39 | 296 | rv = gdk_gc_new ( gtk_widget_get_window(GTK_WIDGET(vvp)) ); |
b244bc6a GB |
297 | if ( gdk_color_parse ( colorname, &color ) ) |
298 | gdk_gc_set_rgb_fg_color ( rv, &color ); | |
299 | else | |
300 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
301 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); |
302 | return rv; | |
303 | } | |
304 | ||
305 | GdkGC *vik_viewport_new_gc_from_color ( VikViewport *vvp, GdkColor *color, gint thickness ) | |
306 | { | |
307 | GdkGC *rv; | |
308 | ||
9b082b39 | 309 | rv = gdk_gc_new ( gtk_widget_get_window(GTK_WIDGET(vvp)) ); |
50a14534 EB |
310 | gdk_gc_set_rgb_fg_color ( rv, color ); |
311 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
312 | return rv; | |
313 | } | |
314 | ||
315 | void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint height ) | |
316 | { | |
317 | vvp->width = width; | |
318 | vvp->height = height; | |
a3603298 RN |
319 | |
320 | vvp->width_2 = vvp->width/2; | |
321 | vvp->height_2 = vvp->height/2; | |
322 | ||
50a14534 EB |
323 | if ( vvp->scr_buffer ) |
324 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
9b082b39 | 325 | vvp->scr_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
0df66d57 EB |
326 | |
327 | /* TODO trigger: only if this is enabled !!! */ | |
328 | if ( vvp->snapshot_buffer ) | |
329 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
9b082b39 | 330 | vvp->snapshot_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
50a14534 EB |
331 | } |
332 | ||
333 | ||
334 | GdkPixmap *vik_viewport_get_pixmap ( VikViewport *vvp ) | |
335 | { | |
336 | return vvp->scr_buffer; | |
337 | } | |
338 | ||
339 | gboolean vik_viewport_configure ( VikViewport *vvp ) | |
340 | { | |
341 | g_return_val_if_fail ( vvp != NULL, TRUE ); | |
342 | ||
343 | vvp->width = GTK_WIDGET(vvp)->allocation.width; | |
344 | vvp->height = GTK_WIDGET(vvp)->allocation.height; | |
345 | ||
a3603298 RN |
346 | vvp->width_2 = vvp->width/2; |
347 | vvp->height_2 = vvp->height/2; | |
348 | ||
50a14534 EB |
349 | if ( vvp->scr_buffer ) |
350 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
351 | ||
9b082b39 | 352 | vvp->scr_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
50a14534 | 353 | |
0df66d57 EB |
354 | /* TODO trigger: only if enabled! */ |
355 | if ( vvp->snapshot_buffer ) | |
356 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
357 | ||
9b082b39 | 358 | vvp->snapshot_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
0df66d57 EB |
359 | /* TODO trigger */ |
360 | ||
50a14534 | 361 | /* this is down here so it can get a GC (necessary?) */ |
e8e82387 | 362 | if ( !vvp->background_gc ) |
50a14534 | 363 | { |
348e8666 | 364 | vvp->background_gc = vik_viewport_new_gc ( vvp, DEFAULT_BACKGROUND_COLOR, 1 ); |
e8e82387 | 365 | vik_viewport_set_background_color ( vvp, DEFAULT_BACKGROUND_COLOR ); |
50a14534 | 366 | } |
480fb7e1 RN |
367 | if ( ! vvp->highlight_gc ) |
368 | { | |
369 | vvp->highlight_gc = vik_viewport_new_gc ( vvp, DEFAULT_HIGHLIGHT_COLOR, 1 ); | |
370 | vik_viewport_set_highlight_color ( vvp, DEFAULT_HIGHLIGHT_COLOR ); | |
371 | } | |
4e485bf3 QT |
372 | if ( !vvp->scale_bg_gc) { |
373 | vvp->scale_bg_gc = vik_viewport_new_gc(vvp, "grey", 3); | |
374 | } | |
50a14534 EB |
375 | |
376 | return FALSE; | |
377 | } | |
378 | ||
379 | static void viewport_finalize ( GObject *gob ) | |
380 | { | |
381 | VikViewport *vvp = VIK_VIEWPORT(gob); | |
382 | ||
383 | g_return_if_fail ( vvp != NULL ); | |
384 | ||
7143d1e4 RN |
385 | if ( a_vik_get_startup_method ( ) == VIK_STARTUP_METHOD_LAST_LOCATION ) { |
386 | struct LatLon ll; | |
387 | vik_coord_to_latlon ( &(vvp->center), &ll ); | |
388 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_LATITUDE, ll.lat ); | |
389 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_LONGITUDE, ll.lon ); | |
390 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_X, vvp->xmpp ); | |
391 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_Y, vvp->ympp ); | |
392 | } | |
393 | ||
50a14534 EB |
394 | if ( vvp->scr_buffer ) |
395 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
396 | ||
0df66d57 EB |
397 | if ( vvp->snapshot_buffer ) |
398 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
399 | ||
50a14534 EB |
400 | if ( vvp->alpha_pixbuf ) |
401 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
402 | ||
403 | if ( vvp->background_gc ) | |
404 | g_object_unref ( G_OBJECT ( vvp->background_gc ) ); | |
405 | ||
480fb7e1 RN |
406 | if ( vvp->highlight_gc ) |
407 | g_object_unref ( G_OBJECT ( vvp->highlight_gc ) ); | |
408 | ||
4e485bf3 QT |
409 | if ( vvp->scale_bg_gc ) { |
410 | g_object_unref ( G_OBJECT ( vvp->scale_bg_gc ) ); | |
411 | vvp->scale_bg_gc = NULL; | |
412 | } | |
413 | ||
50a14534 EB |
414 | G_OBJECT_CLASS(parent_class)->finalize(gob); |
415 | } | |
416 | ||
33e0e500 GB |
417 | /** |
418 | * vik_viewport_clear: | |
419 | * @vvp: self object | |
420 | * | |
421 | * Clear the whole viewport. | |
422 | */ | |
50a14534 EB |
423 | void vik_viewport_clear ( VikViewport *vvp ) |
424 | { | |
425 | g_return_if_fail ( vvp != NULL ); | |
426 | gdk_draw_rectangle(GDK_DRAWABLE(vvp->scr_buffer), vvp->background_gc, TRUE, 0, 0, vvp->width, vvp->height); | |
82aa018d | 427 | vik_viewport_reset_copyrights ( vvp ); |
26336cf0 | 428 | vik_viewport_reset_logos ( vvp ); |
50a14534 EB |
429 | } |
430 | ||
33e0e500 GB |
431 | /** |
432 | * vik_viewport_set_draw_scale: | |
433 | * @vvp: self | |
434 | * @draw_scale: new value | |
435 | * | |
436 | * Enable/Disable display of scale. | |
437 | */ | |
35c7c0ba EB |
438 | void vik_viewport_set_draw_scale ( VikViewport *vvp, gboolean draw_scale ) |
439 | { | |
440 | vvp->draw_scale = draw_scale; | |
441 | } | |
442 | ||
443 | gboolean vik_viewport_get_draw_scale ( VikViewport *vvp ) | |
444 | { | |
445 | return vvp->draw_scale; | |
446 | } | |
447 | ||
acaf7113 AF |
448 | void vik_viewport_draw_scale ( VikViewport *vvp ) |
449 | { | |
c53eda9a GB |
450 | g_return_if_fail ( vvp != NULL ); |
451 | ||
35c7c0ba EB |
452 | if ( vvp->draw_scale ) { |
453 | VikCoord left, right; | |
454 | gdouble unit, base, diff, old_unit, old_diff, ratio; | |
26336cf0 | 455 | gint odd, len, SCSIZE = 5, HEIGHT=10; |
35c7c0ba EB |
456 | PangoLayout *pl; |
457 | gchar s[128]; | |
acaf7113 | 458 | |
35c7c0ba EB |
459 | vik_viewport_screen_to_coord ( vvp, 0, vvp->height, &left ); |
460 | vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height, &right ); | |
acaf7113 | 461 | |
6f9336aa RN |
462 | vik_units_distance_t dist_units = a_vik_get_units_distance (); |
463 | switch (dist_units) { | |
464 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
465 | base = vik_coord_diff ( &left, &right ); // in meters | |
466 | break; | |
467 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a | 468 | // in 0.1 miles (copes better when zoomed in as 1 mile can be too big) |
433b3f7f | 469 | base = VIK_METERS_TO_MILES(vik_coord_diff ( &left, &right )) * 10.0; |
6f9336aa RN |
470 | break; |
471 | default: | |
472 | base = 1; // Keep the compiler happy | |
473 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
474 | } | |
35c7c0ba | 475 | ratio = (vvp->width/SCSIZE)/base; |
acaf7113 | 476 | |
35c7c0ba EB |
477 | unit = 1; |
478 | diff = fabs(base-unit); | |
acaf7113 AF |
479 | old_unit = unit; |
480 | old_diff = diff; | |
35c7c0ba EB |
481 | odd = 1; |
482 | while (diff <= old_diff) { | |
483 | old_unit = unit; | |
484 | old_diff = diff; | |
485 | unit = unit * (odd%2 ? 5 : 2); | |
486 | diff = fabs(base-unit); | |
487 | odd++; | |
488 | } | |
489 | unit = old_unit; | |
490 | len = unit * ratio; | |
acaf7113 | 491 | |
4e485bf3 QT |
492 | /* white background */ |
493 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
494 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); | |
495 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
496 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); | |
497 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
498 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); | |
499 | /* black scale */ | |
ff37db21 | 500 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 501 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); |
ff37db21 | 502 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 503 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); |
ff37db21 | 504 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 505 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); |
35c7c0ba EB |
506 | if (odd%2) { |
507 | int i; | |
508 | for (i=1; i<5; i++) { | |
4e485bf3 QT |
509 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
510 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
ff37db21 | 511 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 512 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
35c7c0ba EB |
513 | } |
514 | } else { | |
515 | int i; | |
516 | for (i=1; i<10; i++) { | |
4e485bf3 QT |
517 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
518 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
ff37db21 | 519 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
35c7c0ba EB |
520 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
521 | } | |
acaf7113 | 522 | } |
35c7c0ba | 523 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); |
ff37db21 | 524 | pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc); |
35c7c0ba | 525 | |
6f9336aa RN |
526 | switch (dist_units) { |
527 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
528 | if (unit >= 1000) { | |
529 | sprintf(s, "%d km", (int)unit/1000); | |
530 | } else { | |
531 | sprintf(s, "%d m", (int)unit); | |
532 | } | |
533 | break; | |
534 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a RN |
535 | // Handle units in 0.1 miles |
536 | if (unit < 10.0) { | |
537 | sprintf(s, "%0.1f miles", unit/10.0); | |
538 | } | |
539 | else if ((int)unit == 10.0) { | |
540 | sprintf(s, "1 mile"); | |
6f9336aa RN |
541 | } |
542 | else { | |
8d772d8a | 543 | sprintf(s, "%d miles", (int)(unit/10.0)); |
6f9336aa RN |
544 | } |
545 | break; | |
546 | default: | |
547 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
acaf7113 | 548 | } |
35c7c0ba | 549 | pango_layout_set_text(pl, s, -1); |
ff37db21 | 550 | vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 551 | PAD + len + PAD, vvp->height - PAD - 10, pl); |
6278ccc6 | 552 | g_object_unref(pl); |
e6869c62 | 553 | pl = NULL; |
35c7c0ba | 554 | } |
acaf7113 AF |
555 | } |
556 | ||
82aa018d GB |
557 | void vik_viewport_draw_copyright ( VikViewport *vvp ) |
558 | { | |
559 | g_return_if_fail ( vvp != NULL ); | |
560 | ||
82aa018d GB |
561 | PangoLayout *pl; |
562 | PangoRectangle ink_rect, logical_rect; | |
563 | gchar s[128] = ""; | |
564 | ||
565 | /* compute copyrights string */ | |
566 | guint len = g_slist_length ( vvp->copyrights ); | |
15a0bd14 | 567 | |
82aa018d GB |
568 | int i; |
569 | for (i = 0 ; i < len ; i++) | |
570 | { | |
15a0bd14 RN |
571 | // Stop when buffer is full |
572 | int slen = strlen ( s ); | |
573 | if ( slen >= 127 ) | |
574 | break; | |
575 | ||
82aa018d | 576 | gchar *copyright = g_slist_nth_data ( vvp->copyrights, i ); |
15a0bd14 RN |
577 | |
578 | // Only use part of this copyright that fits in the available space left | |
579 | // remembering 1 character is left available for the appended space | |
580 | int clen = strlen ( copyright ); | |
581 | if ( slen + clen > 126 ) { | |
582 | clen = 126 - slen; | |
583 | } | |
584 | ||
585 | strncat ( s, copyright, clen ); | |
82aa018d GB |
586 | strcat ( s, " " ); |
587 | } | |
588 | ||
589 | /* create pango layout */ | |
590 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); | |
ff37db21 | 591 | pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc); |
82aa018d GB |
592 | pango_layout_set_alignment ( pl, PANGO_ALIGN_RIGHT ); |
593 | ||
594 | /* Set the text */ | |
595 | pango_layout_set_text(pl, s, -1); | |
596 | ||
597 | /* Use maximum of half the viewport width */ | |
56cb1807 | 598 | pango_layout_set_width ( pl, ( vvp->width / 2 ) * PANGO_SCALE ); |
82aa018d | 599 | pango_layout_get_pixel_extents(pl, &ink_rect, &logical_rect); |
ff37db21 | 600 | vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
56cb1807 | 601 | vvp->width / 2, vvp->height - logical_rect.height, pl); |
82aa018d GB |
602 | |
603 | /* Free memory */ | |
604 | g_object_unref(pl); | |
605 | pl = NULL; | |
606 | } | |
607 | ||
33e0e500 GB |
608 | /** |
609 | * vik_viewport_set_draw_centermark: | |
610 | * @vvp: self object | |
611 | * @draw_centermark: new value | |
612 | * | |
613 | * Enable/Disable display of center mark. | |
614 | */ | |
c933487f QT |
615 | void vik_viewport_set_draw_centermark ( VikViewport *vvp, gboolean draw_centermark ) |
616 | { | |
617 | vvp->draw_centermark = draw_centermark; | |
618 | } | |
619 | ||
620 | gboolean vik_viewport_get_draw_centermark ( VikViewport *vvp ) | |
621 | { | |
622 | return vvp->draw_centermark; | |
623 | } | |
624 | ||
625 | void vik_viewport_draw_centermark ( VikViewport *vvp ) | |
626 | { | |
c53eda9a GB |
627 | g_return_if_fail ( vvp != NULL ); |
628 | ||
c933487f QT |
629 | if ( !vvp->draw_centermark ) |
630 | return; | |
631 | ||
3df69a6b QT |
632 | const int len = 30; |
633 | const int gap = 4; | |
c933487f QT |
634 | int center_x = vvp->width/2; |
635 | int center_y = vvp->height/2; | |
ff37db21 | 636 | GdkGC * black_gc = gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc; |
c933487f QT |
637 | |
638 | /* white back ground */ | |
3df69a6b QT |
639 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x - len, center_y, center_x - gap, center_y); |
640 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x + gap, center_y, center_x + len, center_y); | |
641 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y - len, center_x, center_y - gap); | |
642 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f | 643 | /* black fore ground */ |
3df69a6b QT |
644 | vik_viewport_draw_line(vvp, black_gc, center_x - len, center_y, center_x - gap, center_y); |
645 | vik_viewport_draw_line(vvp, black_gc, center_x + gap, center_y, center_x + len, center_y); | |
646 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y - len, center_x, center_y - gap); | |
647 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f QT |
648 | |
649 | } | |
650 | ||
26336cf0 GB |
651 | void vik_viewport_draw_logo ( VikViewport *vvp ) |
652 | { | |
653 | g_return_if_fail ( vvp != NULL ); | |
654 | ||
26336cf0 GB |
655 | guint len = g_slist_length ( vvp->logos ); |
656 | gint x = vvp->width - PAD; | |
657 | gint y = PAD; | |
658 | int i; | |
659 | for (i = 0 ; i < len ; i++) | |
660 | { | |
661 | GdkPixbuf *logo = g_slist_nth_data ( vvp->logos, i ); | |
662 | gint width = gdk_pixbuf_get_width ( logo ); | |
663 | gint height = gdk_pixbuf_get_height ( logo ); | |
664 | vik_viewport_draw_pixbuf ( vvp, logo, 0, 0, x - width, y, width, height ); | |
665 | x = x - width - PAD; | |
666 | } | |
2afcef36 | 667 | } |
26336cf0 | 668 | |
2afcef36 RN |
669 | void vik_viewport_set_draw_highlight ( VikViewport *vvp, gboolean draw_highlight ) |
670 | { | |
671 | vvp->draw_highlight = draw_highlight; | |
672 | } | |
673 | ||
674 | gboolean vik_viewport_get_draw_highlight ( VikViewport *vvp ) | |
675 | { | |
676 | return vvp->draw_highlight; | |
26336cf0 GB |
677 | } |
678 | ||
50a14534 EB |
679 | void vik_viewport_sync ( VikViewport *vvp ) |
680 | { | |
681 | g_return_if_fail ( vvp != NULL ); | |
9b082b39 | 682 | gdk_draw_drawable(gtk_widget_get_window(GTK_WIDGET(vvp)), 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 |
683 | } |
684 | ||
685 | void vik_viewport_pan_sync ( VikViewport *vvp, gint x_off, gint y_off ) | |
686 | { | |
acaf7113 AF |
687 | gint x, y, wid, hei; |
688 | ||
50a14534 | 689 | g_return_if_fail ( vvp != NULL ); |
9b082b39 | 690 | gdk_draw_drawable(gtk_widget_get_window(GTK_WIDGET(vvp)), 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 |
691 | |
692 | if (x_off >= 0) { | |
693 | x = 0; | |
694 | wid = x_off; | |
695 | } else { | |
696 | x = vvp->width+x_off; | |
697 | wid = -x_off; | |
698 | } | |
699 | if (y_off >= 0) { | |
700 | y = 0; | |
701 | hei = y_off; | |
702 | } else { | |
703 | y = vvp->height+y_off; | |
704 | hei = -y_off; | |
705 | } | |
706 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), x, 0, wid, vvp->height); | |
707 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), 0, y, vvp->width, hei); | |
50a14534 EB |
708 | } |
709 | ||
710 | void vik_viewport_set_zoom ( VikViewport *vvp, gdouble xympp ) | |
711 | { | |
712 | g_return_if_fail ( vvp != NULL ); | |
a3603298 | 713 | if ( xympp >= VIK_VIEWPORT_MIN_ZOOM && xympp <= VIK_VIEWPORT_MAX_ZOOM ) { |
50a14534 | 714 | vvp->xmpp = vvp->ympp = xympp; |
a3603298 RN |
715 | // Since xmpp & ympp are the same it doesn't matter which one is used here |
716 | vvp->xmfactor = vvp->ymfactor = MERCATOR_FACTOR(vvp->xmpp); | |
717 | } | |
50a14534 EB |
718 | |
719 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
720 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
721 | } |
722 | ||
723 | /* or could do factor */ | |
724 | void vik_viewport_zoom_in ( VikViewport *vvp ) | |
725 | { | |
726 | g_return_if_fail ( vvp != NULL ); | |
727 | if ( vvp->xmpp >= (VIK_VIEWPORT_MIN_ZOOM*2) && vvp->ympp >= (VIK_VIEWPORT_MIN_ZOOM*2) ) | |
728 | { | |
729 | vvp->xmpp /= 2; | |
730 | vvp->ympp /= 2; | |
731 | ||
a3603298 RN |
732 | vvp->xmfactor = MERCATOR_FACTOR(vvp->xmpp); |
733 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); | |
734 | ||
50a14534 EB |
735 | viewport_utm_zone_check(vvp); |
736 | } | |
737 | } | |
738 | ||
739 | void vik_viewport_zoom_out ( VikViewport *vvp ) | |
740 | { | |
741 | g_return_if_fail ( vvp != NULL ); | |
742 | if ( vvp->xmpp <= (VIK_VIEWPORT_MAX_ZOOM/2) && vvp->ympp <= (VIK_VIEWPORT_MAX_ZOOM/2) ) | |
743 | { | |
744 | vvp->xmpp *= 2; | |
745 | vvp->ympp *= 2; | |
746 | ||
a3603298 RN |
747 | vvp->xmfactor = MERCATOR_FACTOR(vvp->xmpp); |
748 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); | |
749 | ||
50a14534 EB |
750 | viewport_utm_zone_check(vvp); |
751 | } | |
752 | } | |
753 | ||
754 | gdouble vik_viewport_get_zoom ( VikViewport *vvp ) | |
755 | { | |
756 | if ( vvp->xmpp == vvp->ympp ) | |
757 | return vvp->xmpp; | |
758 | return 0.0; | |
759 | } | |
760 | ||
761 | gdouble vik_viewport_get_xmpp ( VikViewport *vvp ) | |
762 | { | |
763 | return vvp->xmpp; | |
764 | } | |
765 | ||
766 | gdouble vik_viewport_get_ympp ( VikViewport *vvp ) | |
767 | { | |
768 | return vvp->ympp; | |
769 | } | |
770 | ||
771 | void vik_viewport_set_xmpp ( VikViewport *vvp, gdouble xmpp ) | |
772 | { | |
773 | if ( xmpp >= VIK_VIEWPORT_MIN_ZOOM && xmpp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
774 | vvp->xmpp = xmpp; | |
a3603298 | 775 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); |
50a14534 EB |
776 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) |
777 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
778 | } |
779 | } | |
780 | ||
781 | void vik_viewport_set_ympp ( VikViewport *vvp, gdouble ympp ) | |
782 | { | |
783 | if ( ympp >= VIK_VIEWPORT_MIN_ZOOM && ympp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
784 | vvp->ympp = ympp; | |
a3603298 | 785 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); |
50a14534 EB |
786 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) |
787 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
788 | } |
789 | } | |
790 | ||
791 | ||
792 | const VikCoord *vik_viewport_get_center ( VikViewport *vvp ) | |
793 | { | |
794 | g_return_val_if_fail ( vvp != NULL, NULL ); | |
795 | return &(vvp->center); | |
796 | } | |
797 | ||
798 | /* called every time we update coordinates/zoom */ | |
799 | static void viewport_utm_zone_check ( VikViewport *vvp ) | |
800 | { | |
801 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
802 | { | |
803 | struct UTM utm; | |
804 | struct LatLon ll; | |
805 | a_coords_utm_to_latlon ( (struct UTM *) &(vvp->center), &ll ); | |
806 | a_coords_latlon_to_utm ( &ll, &utm ); | |
807 | if ( utm.zone != vvp->center.utm_zone ) | |
808 | *((struct UTM *)(&vvp->center)) = utm; | |
809 | ||
810 | /* misc. stuff so we don't have to check later */ | |
811 | vvp->utm_zone_width = viewport_utm_zone_width ( vvp ); | |
812 | vvp->one_utm_zone = ( vik_viewport_rightmost_zone(vvp) == vik_viewport_leftmost_zone(vvp) ); | |
813 | } | |
814 | } | |
815 | ||
816 | void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll ) | |
817 | { | |
818 | vik_coord_load_from_latlon ( &(vvp->center), vvp->coord_mode, ll ); | |
819 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
820 | viewport_utm_zone_check ( vvp ); | |
821 | } | |
822 | ||
823 | void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm ) | |
824 | { | |
825 | vik_coord_load_from_utm ( &(vvp->center), vvp->coord_mode, utm ); | |
826 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
827 | viewport_utm_zone_check ( vvp ); | |
828 | } | |
829 | ||
830 | void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord ) | |
831 | { | |
832 | vvp->center = *coord; | |
833 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
834 | viewport_utm_zone_check ( vvp ); | |
835 | } | |
836 | ||
837 | void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br ) | |
838 | { | |
839 | g_return_if_fail ( vvp->coord_mode == VIK_COORD_UTM ); | |
840 | ||
841 | /* get center, then just offset */ | |
842 | vik_viewport_center_for_zonen ( vvp, VIK_UTM(ul), zone ); | |
843 | ul->mode = VIK_COORD_UTM; | |
844 | *br = *ul; | |
845 | ||
846 | ul->north_south += (vvp->ympp * vvp->height / 2); | |
847 | ul->east_west -= (vvp->xmpp * vvp->width / 2); | |
848 | br->north_south -= (vvp->ympp * vvp->height / 2); | |
849 | br->east_west += (vvp->xmpp * vvp->width / 2); | |
850 | } | |
851 | ||
852 | void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone) | |
853 | { | |
854 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
855 | *center = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
856 | center->easting -= ( zone - center->zone ) * vvp->utm_zone_width; | |
857 | center->zone = zone; | |
858 | } | |
859 | } | |
860 | ||
861 | gchar vik_viewport_leftmost_zone ( VikViewport *vvp ) | |
862 | { | |
863 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
864 | VikCoord coord; | |
865 | g_assert ( vvp != NULL ); | |
866 | vik_viewport_screen_to_coord ( vvp, 0, 0, &coord ); | |
867 | return coord.utm_zone; | |
868 | } | |
869 | return '\0'; | |
870 | } | |
871 | ||
872 | gchar vik_viewport_rightmost_zone ( VikViewport *vvp ) | |
873 | { | |
874 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
875 | VikCoord coord; | |
876 | g_assert ( vvp != NULL ); | |
877 | vik_viewport_screen_to_coord ( vvp, vvp->width, 0, &coord ); | |
878 | return coord.utm_zone; | |
879 | } | |
880 | return '\0'; | |
881 | } | |
882 | ||
883 | ||
884 | void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y ) | |
885 | { | |
886 | g_return_if_fail ( vvp != NULL ); | |
887 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
888 | /* slightly optimized */ | |
889 | vvp->center.east_west += vvp->xmpp * (x - (vvp->width/2)); | |
890 | vvp->center.north_south += vvp->ympp * ((vvp->height/2) - y); | |
891 | viewport_utm_zone_check ( vvp ); | |
892 | } else { | |
893 | VikCoord tmp; | |
894 | vik_viewport_screen_to_coord ( vvp, x, y, &tmp ); | |
895 | vik_viewport_set_center_coord ( vvp, &tmp ); | |
896 | } | |
897 | } | |
898 | ||
899 | gint vik_viewport_get_width( VikViewport *vvp ) | |
900 | { | |
901 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
902 | return vvp->width; | |
903 | } | |
904 | ||
905 | gint vik_viewport_get_height( VikViewport *vvp ) | |
906 | { | |
907 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
908 | return vvp->height; | |
909 | } | |
910 | ||
911 | void vik_viewport_screen_to_coord ( VikViewport *vvp, int x, int y, VikCoord *coord ) | |
912 | { | |
c53eda9a GB |
913 | g_return_if_fail ( vvp != NULL ); |
914 | ||
50a14534 EB |
915 | if ( vvp->coord_mode == VIK_COORD_UTM ) { |
916 | int zone_delta; | |
917 | struct UTM *utm = (struct UTM *) coord; | |
918 | coord->mode = VIK_COORD_UTM; | |
919 | ||
50a14534 EB |
920 | utm->zone = vvp->center.utm_zone; |
921 | utm->letter = vvp->center.utm_letter; | |
a3603298 | 922 | utm->easting = ( ( x - ( vvp->width_2) ) * vvp->xmpp ) + vvp->center.east_west; |
50a14534 EB |
923 | zone_delta = floor( (utm->easting - EASTING_OFFSET ) / vvp->utm_zone_width + 0.5 ); |
924 | utm->zone += zone_delta; | |
925 | utm->easting -= zone_delta * vvp->utm_zone_width; | |
a3603298 | 926 | utm->northing = ( ( ( vvp->height_2) - y ) * vvp->ympp ) + vvp->center.north_south; |
50a14534 EB |
927 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { |
928 | coord->mode = VIK_COORD_LATLON; | |
d587678a | 929 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
a3603298 RN |
930 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width_2)); |
931 | coord->north_south = vvp->center.north_south + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height_2 - y)); | |
d587678a | 932 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) |
a3603298 | 933 | 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 | 934 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
a3603298 RN |
935 | /* This isn't called with a high frequently so less need to optimize */ |
936 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width_2)); | |
937 | coord->north_south = DEMERCLAT ( MERCLAT(vvp->center.north_south) + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height_2 - y)) ); | |
50a14534 EB |
938 | } |
939 | } | |
940 | } | |
941 | ||
a3603298 RN |
942 | /* |
943 | * Since this function is used for every drawn trackpoint - it can get called alot | |
944 | * Thus x & y position factors are calculated once on zoom changes, | |
945 | * avoiding the need to do it here all the time. | |
946 | * For good measure the half width and height values are also pre calculated too. | |
947 | */ | |
50a14534 EB |
948 | void vik_viewport_coord_to_screen ( VikViewport *vvp, const VikCoord *coord, int *x, int *y ) |
949 | { | |
950 | static VikCoord tmp; | |
951 | g_return_if_fail ( vvp != NULL ); | |
952 | ||
953 | if ( coord->mode != vvp->coord_mode ) | |
954 | { | |
955 | g_warning ( "Have to convert in vik_viewport_coord_to_screen! This should never happen!"); | |
956 | vik_coord_copy_convert ( coord, vvp->coord_mode, &tmp ); | |
957 | coord = &tmp; | |
958 | } | |
959 | ||
960 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
961 | struct UTM *center = (struct UTM *) &(vvp->center); | |
962 | struct UTM *utm = (struct UTM *) coord; | |
963 | if ( center->zone != utm->zone && vvp->one_utm_zone ) | |
964 | { | |
965 | *x = *y = VIK_VIEWPORT_UTM_WRONG_ZONE; | |
966 | return; | |
967 | } | |
968 | ||
a3603298 | 969 | *x = ( (utm->easting - center->easting) / vvp->xmpp ) + (vvp->width_2) - |
50a14534 | 970 | (center->zone - utm->zone ) * vvp->utm_zone_width / vvp->xmpp; |
a3603298 | 971 | *y = (vvp->height_2) - ( (utm->northing - center->northing) / vvp->ympp ); |
50a14534 EB |
972 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { |
973 | struct LatLon *center = (struct LatLon *) &(vvp->center); | |
974 | struct LatLon *ll = (struct LatLon *) coord; | |
975 | double xx,yy; | |
d587678a | 976 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
a3603298 RN |
977 | *x = vvp->width_2 + ( MERCATOR_FACTOR(vvp->xmpp) * (ll->lon - center->lon) ); |
978 | *y = vvp->height_2 + ( MERCATOR_FACTOR(vvp->ympp) * (center->lat - ll->lat) ); | |
d587678a | 979 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) { |
a3603298 | 980 | 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 ); |
50a14534 | 981 | *x = xx; *y = yy; |
50a14534 | 982 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
a3603298 RN |
983 | *x = vvp->width_2 + ( MERCATOR_FACTOR(vvp->xmpp) * (ll->lon - center->lon) ); |
984 | *y = vvp->height_2 + ( MERCATOR_FACTOR(vvp->ympp) * ( MERCLAT(center->lat) - MERCLAT(ll->lat) ) ); | |
50a14534 EB |
985 | } |
986 | } | |
987 | } | |
988 | ||
d9ffd267 EB |
989 | void a_viewport_clip_line ( gint *x1, gint *y1, gint *x2, gint *y2 ) |
990 | { | |
991 | if ( *x1 > 20000 || *x1 < -20000 ) { | |
992 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
993 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
994 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
995 | } else if ( *y1 > 20000 || *y1 < -20000 ) { | |
996 | gdouble shrinkfactor = ABS(20000.0 / *x1); | |
997 | *x1 = *x2 + (shrinkfactor * (*x1-*x2)); | |
998 | *y1 = *y2 + (shrinkfactor * (*y1-*y2)); | |
999 | } else if ( *x2 > 20000 || *x2 < -20000 ) { | |
1000 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
1001 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
1002 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
d9ffd267 EB |
1003 | } else if ( *y2 > 20000 || *y2 < -20000 ) { |
1004 | gdouble shrinkfactor = ABS(20000.0 / (gdouble)*x2); | |
1005 | *x2 = *x1 + (shrinkfactor * (*x2-*x1)); | |
1006 | *y2 = *y1 + (shrinkfactor * (*y2-*y1)); | |
1007 | } | |
1008 | } | |
1009 | ||
50a14534 EB |
1010 | void vik_viewport_draw_line ( VikViewport *vvp, GdkGC *gc, gint x1, gint y1, gint x2, gint y2 ) |
1011 | { | |
1012 | if ( ! ( ( x1 < 0 && x2 < 0 ) || ( y1 < 0 && y2 < 0 ) || | |
d9ffd267 EB |
1013 | ( x1 > vvp->width && x2 > vvp->width ) || ( y1 > vvp->height && y2 > vvp->height ) ) ) { |
1014 | /*** clipping, yeah! ***/ | |
1015 | a_viewport_clip_line ( &x1, &y1, &x2, &y2 ); | |
1016 | gdk_draw_line ( vvp->scr_buffer, gc, x1, y1, x2, y2); | |
1017 | } | |
50a14534 EB |
1018 | } |
1019 | ||
1020 | void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 ) | |
1021 | { | |
add30ebe RN |
1022 | // Using 32 as half the default waypoint image size, so this draws ensures the highlight gets done |
1023 | if ( x1 > -32 && x1 < vvp->width + 32 && y1 > -32 && y1 < vvp->height + 32 ) | |
50a14534 EB |
1024 | gdk_draw_rectangle ( vvp->scr_buffer, gc, filled, x1, y1, x2, y2); |
1025 | } | |
1026 | ||
1027 | void vik_viewport_draw_string ( VikViewport *vvp, GdkFont *font, GdkGC *gc, gint x1, gint y1, const gchar *string ) | |
1028 | { | |
1029 | if ( x1 > -100 && x1 < vvp->width + 100 && y1 > -100 && y1 < vvp->height + 100 ) | |
1030 | gdk_draw_string ( vvp->scr_buffer, font, gc, x1, y1, string ); | |
1031 | } | |
1032 | ||
1033 | /* shouldn't use this -- slow -- change the alpha channel instead. */ | |
1034 | void vik_viewport_draw_pixbuf_with_alpha ( VikViewport *vvp, GdkPixbuf *pixbuf, gint alpha, | |
1035 | gint src_x, gint src_y, gint dest_x, gint dest_y, gint w, gint h ) | |
1036 | { | |
1037 | gint real_dest_x = MAX(dest_x,0); | |
1038 | gint real_dest_y = MAX(dest_y,0); | |
1039 | ||
1040 | if ( alpha == 0 ) | |
1041 | return; /* don't waste your time */ | |
1042 | ||
1043 | if ( w > vvp->alpha_pixbuf_width || h > vvp->alpha_pixbuf_height ) | |
1044 | { | |
1045 | if ( vvp->alpha_pixbuf ) | |
1046 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
1047 | vvp->alpha_pixbuf_width = MAX(w,vvp->alpha_pixbuf_width); | |
1048 | vvp->alpha_pixbuf_height = MAX(h,vvp->alpha_pixbuf_height); | |
1049 | vvp->alpha_pixbuf = gdk_pixbuf_new ( GDK_COLORSPACE_RGB, FALSE, 8, vvp->alpha_pixbuf_width, vvp->alpha_pixbuf_height ); | |
1050 | } | |
1051 | ||
1052 | w = MIN(w,vvp->width - dest_x); | |
1053 | h = MIN(h,vvp->height - dest_y); | |
1054 | ||
1055 | /* check that we are drawing within boundaries. */ | |
1056 | src_x += (real_dest_x - dest_x); | |
1057 | src_y += (real_dest_y - dest_y); | |
1058 | w -= (real_dest_x - dest_x); | |
1059 | h -= (real_dest_y - dest_y); | |
1060 | ||
1061 | gdk_pixbuf_get_from_drawable ( vvp->alpha_pixbuf, vvp->scr_buffer, NULL, | |
1062 | real_dest_x, real_dest_y, 0, 0, w, h ); | |
1063 | ||
1064 | /* do a composite */ | |
1065 | gdk_pixbuf_composite ( pixbuf, vvp->alpha_pixbuf, 0, 0, w, h, -src_x, -src_y, 1, 1, 0, alpha ); | |
1066 | ||
1067 | /* draw pixbuf_tmp */ | |
1068 | vik_viewport_draw_pixbuf ( vvp, vvp->alpha_pixbuf, 0, 0, real_dest_x, real_dest_y, w, h ); | |
1069 | } | |
1070 | ||
1071 | void vik_viewport_draw_pixbuf ( VikViewport *vvp, GdkPixbuf *pixbuf, gint src_x, gint src_y, | |
1072 | gint dest_x, gint dest_y, gint w, gint h ) | |
1073 | { | |
1074 | gdk_draw_pixbuf ( vvp->scr_buffer, | |
ff37db21 RN |
1075 | NULL, |
1076 | pixbuf, | |
50a14534 EB |
1077 | src_x, src_y, dest_x, dest_y, w, h, |
1078 | GDK_RGB_DITHER_NONE, 0, 0 ); | |
1079 | } | |
1080 | ||
1081 | void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2 ) | |
1082 | { | |
1083 | gdk_draw_arc ( vvp->scr_buffer, gc, filled, x, y, width, height, angle1, angle2 ); | |
1084 | } | |
1085 | ||
1086 | ||
1087 | void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints ) | |
1088 | { | |
1089 | gdk_draw_polygon ( vvp->scr_buffer, gc, filled, points, npoints ); | |
1090 | } | |
1091 | ||
1092 | VikCoordMode vik_viewport_get_coord_mode ( const VikViewport *vvp ) | |
1093 | { | |
1094 | g_assert ( vvp ); | |
1095 | return vvp->coord_mode; | |
1096 | } | |
1097 | ||
1098 | static void viewport_set_coord_mode ( VikViewport *vvp, VikCoordMode mode ) | |
1099 | { | |
1100 | g_return_if_fail ( vvp != NULL ); | |
1101 | vvp->coord_mode = mode; | |
1102 | vik_coord_convert ( &(vvp->center), mode ); | |
1103 | } | |
1104 | ||
1105 | /* Thanks GPSDrive */ | |
1106 | 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 ) | |
1107 | { | |
1108 | int px, py; | |
1109 | gdouble dif, lat, lon; | |
1110 | double Ra = Radius[90+(gint)zero_lat]; | |
1111 | ||
1112 | px = (mapSizeX2 - x) * pixelfact_x; | |
1113 | py = (-mapSizeY2 + y) * pixelfact_y; | |
1114 | ||
1115 | lat = zero_lat - py / Ra; | |
1116 | lat = zero_lat - py / Ra; | |
1117 | lon = | |
1118 | zero_long - | |
1119 | px / (Ra * | |
81765f5e | 1120 | cos (DEG2RAD(lat))); |
50a14534 | 1121 | |
81765f5e | 1122 | dif = lat * (1 - (cos (DEG2RAD(fabs (lon - zero_long))))); |
50a14534 EB |
1123 | lat = lat - dif / 1.5; |
1124 | lon = | |
1125 | zero_long - | |
1126 | px / (Ra * | |
81765f5e | 1127 | cos (DEG2RAD(lat))); |
50a14534 EB |
1128 | |
1129 | *lt = lat; | |
1130 | *lg = lon; | |
1131 | return (TRUE); | |
1132 | } | |
1133 | ||
1134 | /* Thanks GPSDrive */ | |
1135 | 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 ) | |
1136 | { | |
1137 | double dif; | |
1138 | double Ra; | |
1139 | gint mapSizeX = 2 * mapSizeX2; | |
1140 | gint mapSizeY = 2 * mapSizeY2; | |
1141 | ||
1142 | g_assert ( lt >= -90.0 && lt <= 90.0 ); | |
1143 | // lg *= rad2deg; // FIXME, optimize equations | |
1144 | // lt *= rad2deg; | |
1145 | Ra = Radius[90+(gint)lt]; | |
1146 | *x = Ra * | |
81765f5e | 1147 | cos (DEG2RAD(lt)) * (lg - zero_long); |
50a14534 | 1148 | *y = Ra * (lt - zero_lat); |
81765f5e | 1149 | dif = Ra * RAD2DEG(1 - (cos ((DEG2RAD(lg - zero_long))))); |
50a14534 EB |
1150 | *y = *y + dif / 1.85; |
1151 | *x = *x / pixelfact_x; | |
1152 | *y = *y / pixelfact_y; | |
1153 | *x = mapSizeX2 - *x; | |
1154 | *y += mapSizeY2; | |
1155 | if ((*x < 0)||(*x >= mapSizeX)||(*y < 0)||(*y >= mapSizeY)) | |
1156 | return (FALSE); | |
1157 | return (TRUE); | |
1158 | } | |
1159 | ||
1160 | static void viewport_init_ra() | |
1161 | { | |
1162 | static gboolean done_before = FALSE; | |
1163 | if ( !done_before ) | |
1164 | { | |
1165 | gint i; | |
1166 | for ( i = -90; i <= 90; i++) | |
81765f5e | 1167 | Radius[i+90] = calcR ( DEG2RAD((double)i) ); |
50a14534 EB |
1168 | done_before = TRUE; |
1169 | } | |
1170 | } | |
1171 | ||
1172 | double calcR (double lat) | |
1173 | { | |
1174 | double a = 6378.137, r, sc, x, y, z; | |
1175 | double e2 = 0.081082 * 0.081082; | |
1176 | /* | |
1177 | * the radius of curvature of an ellipsoidal Earth in the plane of the | |
1178 | * meridian is given by | |
1179 | * | |
1180 | * R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2) | |
1181 | * | |
1182 | * | |
1183 | * where a is the equatorial radius, b is the polar radius, and e is | |
1184 | * the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2) | |
1185 | * | |
1186 | * a = 6378 km (3963 mi) Equatorial radius (surface to center distance) | |
1187 | * b = 6356.752 km (3950 mi) Polar radius (surface to center distance) e | |
1188 | * = 0.081082 Eccentricity | |
1189 | */ | |
1190 | ||
81765f5e | 1191 | lat = DEG2RAD(lat); |
50a14534 EB |
1192 | sc = sin (lat); |
1193 | x = a * (1.0 - e2); | |
1194 | z = 1.0 - e2 * sc * sc; | |
1195 | y = pow (z, 1.5); | |
1196 | r = x / y; | |
1197 | r = r * 1000.0; | |
1198 | return r; | |
1199 | } | |
1200 | ||
1201 | gboolean vik_viewport_is_one_zone ( VikViewport *vvp ) | |
1202 | { | |
1203 | return vvp->coord_mode == VIK_COORD_UTM && vvp->one_utm_zone; | |
1204 | } | |
1205 | ||
1206 | void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout ) | |
1207 | { | |
1208 | if ( x > -100 && x < vvp->width + 100 && y > -100 && y < vvp->height + 100 ) | |
1209 | gdk_draw_layout ( vvp->scr_buffer, gc, x, y, layout ); | |
1210 | } | |
1211 | ||
1212 | void vik_gc_get_fg_color ( GdkGC *gc, GdkColor *dest ) | |
1213 | { | |
1214 | static GdkGCValues values; | |
1215 | gdk_gc_get_values ( gc, &values ); | |
1216 | gdk_colormap_query_color ( gdk_colormap_get_system(), values.foreground.pixel, dest ); | |
1217 | } | |
1218 | ||
1219 | GdkFunction vik_gc_get_function ( GdkGC *gc ) | |
1220 | { | |
1221 | static GdkGCValues values; | |
1222 | gdk_gc_get_values ( gc, &values ); | |
1223 | return values.function; | |
1224 | } | |
1225 | ||
1226 | void vik_viewport_set_drawmode ( VikViewport *vvp, VikViewportDrawMode drawmode ) | |
1227 | { | |
1228 | vvp->drawmode = drawmode; | |
1229 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
1230 | viewport_set_coord_mode ( vvp, VIK_COORD_UTM ); | |
1231 | else { | |
1232 | viewport_set_coord_mode ( vvp, VIK_COORD_LATLON ); | |
50a14534 EB |
1233 | } |
1234 | } | |
1235 | ||
1236 | VikViewportDrawMode vik_viewport_get_drawmode ( VikViewport *vvp ) | |
1237 | { | |
1238 | return vvp->drawmode; | |
1239 | } | |
1240 | ||
0df66d57 EB |
1241 | /******** triggering *******/ |
1242 | void vik_viewport_set_trigger ( VikViewport *vp, gpointer trigger ) | |
1243 | { | |
1244 | vp->trigger = trigger; | |
1245 | } | |
1246 | ||
1247 | gpointer vik_viewport_get_trigger ( VikViewport *vp ) | |
1248 | { | |
1249 | return vp->trigger; | |
1250 | } | |
1251 | ||
1252 | void vik_viewport_snapshot_save ( VikViewport *vp ) | |
1253 | { | |
1254 | gdk_draw_drawable ( vp->snapshot_buffer, vp->background_gc, vp->scr_buffer, 0, 0, 0, 0, -1, -1 ); | |
1255 | } | |
1256 | ||
1257 | void vik_viewport_snapshot_load ( VikViewport *vp ) | |
1258 | { | |
1259 | gdk_draw_drawable ( vp->scr_buffer, vp->background_gc, vp->snapshot_buffer, 0, 0, 0, 0, -1, -1 ); | |
1260 | } | |
1261 | ||
1262 | void vik_viewport_set_half_drawn(VikViewport *vp, gboolean half_drawn) | |
1263 | { | |
1264 | vp->half_drawn = half_drawn; | |
1265 | } | |
1266 | ||
1267 | gboolean vik_viewport_get_half_drawn( VikViewport *vp ) | |
1268 | { | |
1269 | return vp->half_drawn; | |
1270 | } | |
1271 | ||
7bc965c0 GB |
1272 | |
1273 | const gchar *vik_viewport_get_drawmode_name(VikViewport *vv, VikViewportDrawMode mode) | |
0c1044e9 | 1274 | { |
7bc965c0 | 1275 | const gchar *name = NULL; |
24277274 | 1276 | VikWindow *vw = NULL; |
7bc965c0 GB |
1277 | GtkWidget *mode_button; |
1278 | GtkWidget *label; | |
24277274 GB |
1279 | |
1280 | vw = VIK_WINDOW_FROM_WIDGET(vv); | |
1281 | mode_button = vik_window_get_drawmode_button(vw, mode); | |
7bc965c0 GB |
1282 | label = gtk_bin_get_child(GTK_BIN(mode_button)); |
1283 | ||
1284 | name = gtk_label_get_text ( GTK_LABEL(label) ); | |
314c1ccc | 1285 | |
7bc965c0 | 1286 | return name; |
314c1ccc QT |
1287 | |
1288 | } | |
7bc965c0 | 1289 | |
0c1044e9 EB |
1290 | void vik_viewport_get_min_max_lat_lon ( VikViewport *vp, gdouble *min_lat, gdouble *max_lat, gdouble *min_lon, gdouble *max_lon ) |
1291 | { | |
1292 | VikCoord tleft, tright, bleft, bright; | |
1293 | ||
1294 | vik_viewport_screen_to_coord ( vp, 0, 0, &tleft ); | |
1295 | vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright ); | |
1296 | vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft ); | |
1297 | vik_viewport_screen_to_coord ( vp, vp->width, vp->height, &bright ); | |
7bc965c0 | 1298 | |
0c1044e9 EB |
1299 | vik_coord_convert(&tleft, VIK_COORD_LATLON); |
1300 | vik_coord_convert(&tright, VIK_COORD_LATLON); | |
1301 | vik_coord_convert(&bleft, VIK_COORD_LATLON); | |
1302 | vik_coord_convert(&bright, VIK_COORD_LATLON); | |
1303 | ||
1304 | *max_lat = MAX(tleft.north_south, tright.north_south); | |
1305 | *min_lat = MIN(bleft.north_south, bright.north_south); | |
1306 | *max_lon = MAX(tright.east_west, bright.east_west); | |
1307 | *min_lon = MIN(tleft.east_west, bleft.east_west); | |
1308 | } | |
82aa018d GB |
1309 | |
1310 | void vik_viewport_reset_copyrights ( VikViewport *vp ) | |
1311 | { | |
1312 | g_return_if_fail ( vp != NULL ); | |
1313 | g_slist_foreach ( vp->copyrights, (GFunc)g_free, NULL ); | |
1314 | g_slist_free ( vp->copyrights ); | |
1315 | vp->copyrights = NULL; | |
1316 | } | |
1317 | ||
33e0e500 GB |
1318 | /** |
1319 | * vik_viewport_add_copyright: | |
1320 | * @vp: self object | |
1321 | * @copyright: new copyright to display | |
1322 | * | |
1323 | * Add a copyright to display on viewport. | |
1324 | */ | |
82aa018d GB |
1325 | void vik_viewport_add_copyright ( VikViewport *vp, const gchar *copyright ) |
1326 | { | |
1327 | g_return_if_fail ( vp != NULL ); | |
1328 | if ( copyright ) | |
1329 | { | |
bbbd639f | 1330 | GSList *found = g_slist_find_custom ( vp->copyrights, copyright, (GCompareFunc)strcmp ); |
82aa018d GB |
1331 | if ( found == NULL ) |
1332 | { | |
1333 | gchar *duple = g_strdup ( copyright ); | |
1334 | vp->copyrights = g_slist_prepend ( vp->copyrights, duple ); | |
1335 | } | |
1336 | } | |
1337 | } | |
26336cf0 GB |
1338 | |
1339 | void vik_viewport_reset_logos ( VikViewport *vp ) | |
1340 | { | |
1341 | g_return_if_fail ( vp != NULL ); | |
1342 | /* do not free elem */ | |
1343 | g_slist_free ( vp->logos ); | |
1344 | vp->logos = NULL; | |
1345 | } | |
1346 | ||
1347 | void vik_viewport_add_logo ( VikViewport *vp, const GdkPixbuf *logo ) | |
1348 | { | |
1349 | g_return_if_fail ( vp != NULL ); | |
1350 | if ( logo ) | |
1351 | { | |
1352 | GdkPixbuf *found = NULL; /* FIXME (GdkPixbuf*)g_slist_find_custom ( vp->logos, logo, (GCompareFunc)== ); */ | |
1353 | if ( found == NULL ) | |
1354 | { | |
1355 | vp->logos = g_slist_prepend ( vp->logos, (gpointer)logo ); | |
1356 | } | |
1357 | } | |
1358 | } | |
9a3538f5 GB |
1359 | |
1360 | /** | |
1361 | * vik_viewport_compute_bearing: | |
1362 | * @vp: self object | |
1363 | * @x1: screen coord | |
1364 | * @y1: screen coord | |
1365 | * @x2: screen coord | |
1366 | * @y2: screen coord | |
1367 | * @angle: bearing in Radian (output) | |
1368 | * @baseangle: UTM base angle in Radian (output) | |
1369 | * | |
1370 | * Compute bearing. | |
1371 | */ | |
1372 | void vik_viewport_compute_bearing ( VikViewport *vp, gint x1, gint y1, gint x2, gint y2, gdouble *angle, gdouble *baseangle ) | |
1373 | { | |
1374 | gdouble len = sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2)); | |
1375 | gdouble dx = (x2-x1)/len*10; | |
1376 | gdouble dy = (y2-y1)/len*10; | |
1377 | ||
1378 | *angle = atan2(dy, dx) + M_PI_2; | |
1379 | ||
1380 | if ( vik_viewport_get_drawmode ( vp ) == VIK_VIEWPORT_DRAWMODE_UTM) { | |
1381 | VikCoord test; | |
1382 | struct LatLon ll; | |
1383 | struct UTM u; | |
1384 | gint tx, ty; | |
1385 | ||
1386 | vik_viewport_screen_to_coord ( vp, x1, y1, &test ); | |
1387 | vik_coord_to_latlon ( &test, &ll ); | |
1388 | ll.lat += vik_viewport_get_ympp ( vp ) * vik_viewport_get_height ( vp ) / 11000.0; // about 11km per degree latitude | |
1389 | a_coords_latlon_to_utm ( &ll, &u ); | |
1390 | vik_coord_load_from_utm ( &test, VIK_VIEWPORT_DRAWMODE_UTM, &u ); | |
1391 | vik_viewport_coord_to_screen ( vp, &test, &tx, &ty ); | |
1392 | ||
1393 | *baseangle = M_PI - atan2(tx-x1, ty-y1); | |
1394 | *angle -= *baseangle; | |
1395 | } | |
1396 | ||
1397 | if (*angle < 0) | |
1398 | *angle += 2*M_PI; | |
1399 | if (*angle > 2*M_PI) | |
1400 | *angle -= 2*M_PI; | |
1401 | } |