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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> |
be5554c5 | 5 | * Copyright (C) 2013, Rob Norris <rw_norris@hotmail.com> |
50a14534 EB |
6 | * |
7 | * Lat/Lon plotting functions calcxy* are from GPSDrive | |
8 | * GPSDrive Copyright (C) 2001-2004 Fritz Ganter <ganter@ganter.at> | |
9 | * | |
10 | * Multiple UTM zone patch by Kit Transue <notlostyet@didactek.com> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | */ | |
8c00358d GB |
27 | #ifdef HAVE_CONFIG_H |
28 | #include "config.h" | |
29 | #endif | |
50a14534 EB |
30 | |
31 | #define DEFAULT_BACKGROUND_COLOR "#CCCCCC" | |
480fb7e1 RN |
32 | #define DEFAULT_HIGHLIGHT_COLOR "#EEA500" |
33 | /* Default highlight in orange */ | |
50a14534 EB |
34 | |
35 | #include <gtk/gtk.h> | |
8c00358d | 36 | #ifdef HAVE_MATH_H |
50a14534 | 37 | #include <math.h> |
8c00358d | 38 | #endif |
82aa018d GB |
39 | #ifdef HAVE_STRING_H |
40 | #include <string.h> | |
41 | #endif | |
50a14534 EB |
42 | |
43 | #include "coords.h" | |
44 | #include "vikcoord.h" | |
a59e6eb9 | 45 | #include "vikwindow.h" |
50a14534 | 46 | #include "vikviewport.h" |
50a14534 EB |
47 | #include "mapcoord.h" |
48 | ||
49 | /* for ALTI_TO_MPP */ | |
50 | #include "globals.h" | |
7143d1e4 | 51 | #include "settings.h" |
fca1f3ad | 52 | #include "dialog.h" |
50a14534 | 53 | |
a3603298 RN |
54 | #define MERCATOR_FACTOR(x) ( (65536.0 / 180 / (x)) * 256.0 ) |
55 | ||
50a14534 EB |
56 | static gdouble EASTING_OFFSET = 500000.0; |
57 | ||
26336cf0 GB |
58 | static gint PAD = 10; |
59 | ||
50a14534 EB |
60 | static void viewport_finalize ( GObject *gob ); |
61 | static void viewport_utm_zone_check ( VikViewport *vvp ); | |
be5554c5 RN |
62 | static void update_centers ( VikViewport *vvp ); |
63 | static void free_centers ( VikViewport *vvp, guint start ); | |
50a14534 EB |
64 | |
65 | 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 ); | |
66 | 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 ); | |
67 | double calcR (double lat); | |
68 | ||
69 | static double Radius[181]; | |
70 | static void viewport_init_ra(); | |
71 | ||
72 | static GObjectClass *parent_class; | |
73 | ||
50a14534 EB |
74 | struct _VikViewport { |
75 | GtkDrawingArea drawing_area; | |
76 | GdkPixmap *scr_buffer; | |
77 | gint width, height; | |
a3603298 | 78 | gint width_2, height_2; // Half of the normal width and height |
50a14534 EB |
79 | VikCoord center; |
80 | VikCoordMode coord_mode; | |
81 | gdouble xmpp, ympp; | |
a3603298 | 82 | gdouble xmfactor, ymfactor; |
fca1f3ad | 83 | GList *centers; // The history of requested positions (of VikCoord type) |
be5554c5 RN |
84 | guint centers_index; // current position within the history list |
85 | guint centers_max; // configurable maximum size of the history list | |
86 | guint centers_radius; // Metres | |
50a14534 | 87 | |
50a14534 EB |
88 | gdouble utm_zone_width; |
89 | gboolean one_utm_zone; | |
90 | ||
91 | GdkGC *background_gc; | |
92 | GdkColor background_color; | |
4e485bf3 | 93 | GdkGC *scale_bg_gc; |
82aa018d GB |
94 | |
95 | GSList *copyrights; | |
26336cf0 | 96 | GSList *logos; |
82aa018d GB |
97 | |
98 | /* Wether or not display OSD info */ | |
35c7c0ba | 99 | gboolean draw_scale; |
c933487f | 100 | gboolean draw_centermark; |
2afcef36 | 101 | gboolean draw_highlight; |
480fb7e1 RN |
102 | GdkGC *highlight_gc; |
103 | GdkColor highlight_color; | |
50a14534 EB |
104 | |
105 | /* subset of coord types. lat lon can be plotted in 2 ways, google or exp. */ | |
106 | VikViewportDrawMode drawmode; | |
107 | ||
0df66d57 EB |
108 | /* trigger stuff */ |
109 | gpointer trigger; | |
110 | GdkPixmap *snapshot_buffer; | |
111 | gboolean half_drawn; | |
50a14534 EB |
112 | }; |
113 | ||
114 | static gdouble | |
115 | viewport_utm_zone_width ( VikViewport *vvp ) | |
116 | { | |
117 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
118 | struct LatLon ll; | |
119 | ||
120 | /* get latitude of screen bottom */ | |
121 | struct UTM utm = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
122 | utm.northing -= vvp -> height * vvp -> ympp / 2; | |
123 | a_coords_utm_to_latlon ( &utm, &ll ); | |
124 | ||
125 | /* boundary */ | |
126 | ll.lon = (utm.zone - 1) * 6 - 180 ; | |
127 | a_coords_latlon_to_utm ( &ll, &utm); | |
128 | return fabs ( utm.easting - EASTING_OFFSET ) * 2; | |
129 | } else | |
130 | return 0.0; | |
131 | } | |
132 | ||
be5554c5 RN |
133 | enum { |
134 | VW_UPDATED_CENTER_SIGNAL = 0, | |
135 | VW_LAST_SIGNAL, | |
136 | }; | |
137 | static guint viewport_signals[VW_LAST_SIGNAL] = { 0 }; | |
138 | ||
eb560cd6 | 139 | G_DEFINE_TYPE (VikViewport, vik_viewport, GTK_TYPE_DRAWING_AREA) |
50a14534 | 140 | |
eb560cd6 GB |
141 | static void |
142 | vik_viewport_class_init ( VikViewportClass *klass ) | |
50a14534 EB |
143 | { |
144 | /* Destructor */ | |
145 | GObjectClass *object_class; | |
146 | ||
147 | object_class = G_OBJECT_CLASS (klass); | |
148 | ||
149 | object_class->finalize = viewport_finalize; | |
150 | ||
151 | parent_class = g_type_class_peek_parent (klass); | |
be5554c5 RN |
152 | |
153 | viewport_signals[VW_UPDATED_CENTER_SIGNAL] = g_signal_new ( "updated_center", G_TYPE_FROM_CLASS (klass), | |
154 | G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (VikViewportClass, updated_center), NULL, NULL, | |
155 | g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); | |
50a14534 EB |
156 | } |
157 | ||
24277274 | 158 | VikViewport *vik_viewport_new () |
50a14534 | 159 | { |
a59e6eb9 | 160 | VikViewport *vv = VIK_VIEWPORT ( g_object_new ( VIK_VIEWPORT_TYPE, NULL ) ); |
a59e6eb9 | 161 | return vv; |
50a14534 EB |
162 | } |
163 | ||
7143d1e4 RN |
164 | #define VIK_SETTINGS_VIEW_LAST_LATITUDE "viewport_last_latitude" |
165 | #define VIK_SETTINGS_VIEW_LAST_LONGITUDE "viewport_last_longitude" | |
166 | #define VIK_SETTINGS_VIEW_LAST_ZOOM_X "viewport_last_zoom_xpp" | |
167 | #define VIK_SETTINGS_VIEW_LAST_ZOOM_Y "viewport_last_zoom_ypp" | |
be5554c5 RN |
168 | #define VIK_SETTINGS_VIEW_HISTORY_SIZE "viewport_history_size" |
169 | #define VIK_SETTINGS_VIEW_HISTORY_DIFF_DIST "viewport_history_diff_dist" | |
7143d1e4 | 170 | |
eb560cd6 GB |
171 | static void |
172 | vik_viewport_init ( VikViewport *vvp ) | |
50a14534 EB |
173 | { |
174 | viewport_init_ra(); | |
175 | ||
5210c3d3 GB |
176 | struct UTM utm; |
177 | struct LatLon ll; | |
178 | ll.lat = a_vik_get_default_lat(); | |
179 | ll.lon = a_vik_get_default_long(); | |
7143d1e4 RN |
180 | gdouble zoom_x = 4.0; |
181 | gdouble zoom_y = 4.0; | |
182 | ||
183 | if ( a_vik_get_startup_method ( ) == VIK_STARTUP_METHOD_LAST_LOCATION ) { | |
184 | gdouble lat, lon, dzoom; | |
185 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_LATITUDE, &lat ) ) | |
186 | ll.lat = lat; | |
187 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_LONGITUDE, &lon ) ) | |
188 | ll.lon = lon; | |
189 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_X, &dzoom ) ) | |
190 | zoom_x = dzoom; | |
191 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_Y, &dzoom ) ) | |
192 | zoom_y = dzoom; | |
193 | } | |
194 | ||
5210c3d3 GB |
195 | a_coords_latlon_to_utm ( &ll, &utm ); |
196 | ||
7143d1e4 RN |
197 | vvp->xmpp = zoom_x; |
198 | vvp->ympp = zoom_y; | |
a3603298 RN |
199 | vvp->xmfactor = MERCATOR_FACTOR (vvp->xmpp); |
200 | vvp->ymfactor = MERCATOR_FACTOR (vvp->ympp); | |
6a9ff0ee QT |
201 | vvp->coord_mode = VIK_COORD_LATLON; |
202 | vvp->drawmode = VIK_VIEWPORT_DRAWMODE_MERCATOR; | |
ee180665 | 203 | vvp->center.mode = VIK_COORD_LATLON; |
5210c3d3 GB |
204 | vvp->center.north_south = ll.lat; |
205 | vvp->center.east_west = ll.lon; | |
206 | vvp->center.utm_zone = (int)utm.zone; | |
207 | vvp->center.utm_letter = utm.letter; | |
50a14534 | 208 | vvp->scr_buffer = NULL; |
50a14534 EB |
209 | vvp->utm_zone_width = 0.0; |
210 | vvp->background_gc = NULL; | |
480fb7e1 | 211 | vvp->highlight_gc = NULL; |
4e485bf3 | 212 | vvp->scale_bg_gc = NULL; |
82aa018d GB |
213 | |
214 | vvp->copyrights = NULL; | |
be5554c5 RN |
215 | vvp->centers = NULL; |
216 | vvp->centers_index = 0; | |
217 | vvp->centers_max = 20; | |
218 | gint tmp = vvp->centers_max; | |
219 | if ( a_settings_get_integer ( VIK_SETTINGS_VIEW_HISTORY_SIZE, &tmp ) ) | |
220 | vvp->centers_max = tmp; | |
221 | vvp->centers_radius = 500; | |
222 | if ( a_settings_get_integer ( VIK_SETTINGS_VIEW_HISTORY_DIFF_DIST, &tmp ) ) | |
223 | vvp->centers_radius = tmp; | |
82aa018d | 224 | |
35c7c0ba | 225 | vvp->draw_scale = TRUE; |
c933487f | 226 | vvp->draw_centermark = TRUE; |
2afcef36 | 227 | vvp->draw_highlight = TRUE; |
0df66d57 EB |
228 | |
229 | vvp->trigger = NULL; | |
230 | vvp->snapshot_buffer = NULL; | |
231 | vvp->half_drawn = FALSE; | |
232 | ||
be5554c5 RN |
233 | // Initiate center history |
234 | update_centers ( vvp ); | |
235 | ||
50a14534 | 236 | g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL); |
165d30aa | 237 | |
2fd7c35e RN |
238 | #if GTK_CHECK_VERSION (2,18,0) |
239 | gtk_widget_set_can_focus ( GTK_WIDGET(vvp), TRUE ); | |
240 | #else | |
165d30aa | 241 | GTK_WIDGET_SET_FLAGS(vvp, GTK_CAN_FOCUS); /* allow VVP to have focus -- enabling key events, etc */ |
2fd7c35e | 242 | #endif |
50a14534 EB |
243 | } |
244 | ||
245 | GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp ) | |
246 | { | |
247 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
248 | *rv = vvp->background_color; | |
249 | return rv; | |
250 | } | |
251 | ||
252 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
253 | const gchar *vik_viewport_get_background_color ( VikViewport *vvp ) | |
254 | { | |
255 | static gchar color[8]; | |
256 | 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)); | |
257 | return color; | |
258 | } | |
259 | ||
260 | void vik_viewport_set_background_color ( VikViewport *vvp, const gchar *colorname ) | |
261 | { | |
52aa15a7 | 262 | g_assert ( vvp && vvp->background_gc ); |
b244bc6a GB |
263 | if ( gdk_color_parse ( colorname, &(vvp->background_color) ) ) |
264 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, &(vvp->background_color) ); | |
265 | else | |
266 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
267 | } |
268 | ||
269 | void vik_viewport_set_background_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
270 | { | |
52aa15a7 | 271 | g_assert ( vvp && vvp->background_gc ); |
50a14534 EB |
272 | vvp->background_color = *color; |
273 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, color ); | |
274 | } | |
275 | ||
480fb7e1 RN |
276 | GdkColor *vik_viewport_get_highlight_gdkcolor ( VikViewport *vvp ) |
277 | { | |
278 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
279 | *rv = vvp->highlight_color; | |
280 | return rv; | |
281 | } | |
282 | ||
283 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
284 | const gchar *vik_viewport_get_highlight_color ( VikViewport *vvp ) | |
285 | { | |
286 | static gchar color[8]; | |
287 | 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)); | |
288 | return color; | |
289 | } | |
290 | ||
291 | void vik_viewport_set_highlight_color ( VikViewport *vvp, const gchar *colorname ) | |
292 | { | |
293 | g_assert ( vvp->highlight_gc ); | |
294 | gdk_color_parse ( colorname, &(vvp->highlight_color) ); | |
295 | gdk_gc_set_rgb_fg_color ( vvp->highlight_gc, &(vvp->highlight_color) ); | |
296 | } | |
297 | ||
298 | void vik_viewport_set_highlight_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
299 | { | |
300 | g_assert ( vvp->highlight_gc ); | |
301 | vvp->highlight_color = *color; | |
302 | gdk_gc_set_rgb_fg_color ( vvp->highlight_gc, color ); | |
303 | } | |
304 | ||
305 | GdkGC *vik_viewport_get_gc_highlight ( VikViewport *vvp ) | |
306 | { | |
307 | return vvp->highlight_gc; | |
308 | } | |
50a14534 | 309 | |
04f36d92 RN |
310 | void vik_viewport_set_highlight_thickness ( VikViewport *vvp, gint thickness ) |
311 | { | |
312 | // Otherwise same GDK_* attributes as in vik_viewport_new_gc | |
313 | gdk_gc_set_line_attributes ( vvp->highlight_gc, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
314 | } | |
315 | ||
50a14534 EB |
316 | GdkGC *vik_viewport_new_gc ( VikViewport *vvp, const gchar *colorname, gint thickness ) |
317 | { | |
b244bc6a | 318 | GdkGC *rv = NULL; |
50a14534 EB |
319 | GdkColor color; |
320 | ||
9b082b39 | 321 | rv = gdk_gc_new ( gtk_widget_get_window(GTK_WIDGET(vvp)) ); |
b244bc6a GB |
322 | if ( gdk_color_parse ( colorname, &color ) ) |
323 | gdk_gc_set_rgb_fg_color ( rv, &color ); | |
324 | else | |
325 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
326 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); |
327 | return rv; | |
328 | } | |
329 | ||
330 | GdkGC *vik_viewport_new_gc_from_color ( VikViewport *vvp, GdkColor *color, gint thickness ) | |
331 | { | |
332 | GdkGC *rv; | |
333 | ||
9b082b39 | 334 | rv = gdk_gc_new ( gtk_widget_get_window(GTK_WIDGET(vvp)) ); |
50a14534 EB |
335 | gdk_gc_set_rgb_fg_color ( rv, color ); |
336 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
337 | return rv; | |
338 | } | |
339 | ||
340 | void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint height ) | |
341 | { | |
342 | vvp->width = width; | |
343 | vvp->height = height; | |
a3603298 RN |
344 | |
345 | vvp->width_2 = vvp->width/2; | |
346 | vvp->height_2 = vvp->height/2; | |
347 | ||
50a14534 EB |
348 | if ( vvp->scr_buffer ) |
349 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
9b082b39 | 350 | vvp->scr_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
0df66d57 EB |
351 | |
352 | /* TODO trigger: only if this is enabled !!! */ | |
353 | if ( vvp->snapshot_buffer ) | |
354 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
9b082b39 | 355 | vvp->snapshot_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
50a14534 EB |
356 | } |
357 | ||
358 | ||
359 | GdkPixmap *vik_viewport_get_pixmap ( VikViewport *vvp ) | |
360 | { | |
361 | return vvp->scr_buffer; | |
362 | } | |
363 | ||
364 | gboolean vik_viewport_configure ( VikViewport *vvp ) | |
365 | { | |
366 | g_return_val_if_fail ( vvp != NULL, TRUE ); | |
367 | ||
90ba111c RN |
368 | GtkAllocation allocation; |
369 | gtk_widget_get_allocation ( GTK_WIDGET(vvp), &allocation ); | |
370 | vvp->width = allocation.width; | |
371 | vvp->height = allocation.height; | |
50a14534 | 372 | |
a3603298 RN |
373 | vvp->width_2 = vvp->width/2; |
374 | vvp->height_2 = vvp->height/2; | |
375 | ||
50a14534 EB |
376 | if ( vvp->scr_buffer ) |
377 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
378 | ||
9b082b39 | 379 | vvp->scr_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
50a14534 | 380 | |
0df66d57 EB |
381 | /* TODO trigger: only if enabled! */ |
382 | if ( vvp->snapshot_buffer ) | |
383 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
384 | ||
9b082b39 | 385 | vvp->snapshot_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
0df66d57 EB |
386 | /* TODO trigger */ |
387 | ||
50a14534 | 388 | /* this is down here so it can get a GC (necessary?) */ |
e8e82387 | 389 | if ( !vvp->background_gc ) |
50a14534 | 390 | { |
348e8666 | 391 | vvp->background_gc = vik_viewport_new_gc ( vvp, DEFAULT_BACKGROUND_COLOR, 1 ); |
e8e82387 | 392 | vik_viewport_set_background_color ( vvp, DEFAULT_BACKGROUND_COLOR ); |
50a14534 | 393 | } |
480fb7e1 RN |
394 | if ( ! vvp->highlight_gc ) |
395 | { | |
396 | vvp->highlight_gc = vik_viewport_new_gc ( vvp, DEFAULT_HIGHLIGHT_COLOR, 1 ); | |
397 | vik_viewport_set_highlight_color ( vvp, DEFAULT_HIGHLIGHT_COLOR ); | |
398 | } | |
4e485bf3 QT |
399 | if ( !vvp->scale_bg_gc) { |
400 | vvp->scale_bg_gc = vik_viewport_new_gc(vvp, "grey", 3); | |
401 | } | |
50a14534 EB |
402 | |
403 | return FALSE; | |
404 | } | |
405 | ||
406 | static void viewport_finalize ( GObject *gob ) | |
407 | { | |
408 | VikViewport *vvp = VIK_VIEWPORT(gob); | |
409 | ||
410 | g_return_if_fail ( vvp != NULL ); | |
411 | ||
7143d1e4 RN |
412 | if ( a_vik_get_startup_method ( ) == VIK_STARTUP_METHOD_LAST_LOCATION ) { |
413 | struct LatLon ll; | |
414 | vik_coord_to_latlon ( &(vvp->center), &ll ); | |
415 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_LATITUDE, ll.lat ); | |
416 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_LONGITUDE, ll.lon ); | |
417 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_X, vvp->xmpp ); | |
418 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_Y, vvp->ympp ); | |
419 | } | |
420 | ||
be5554c5 RN |
421 | if ( vvp->centers ) |
422 | free_centers ( vvp, 0 ); | |
423 | ||
50a14534 EB |
424 | if ( vvp->scr_buffer ) |
425 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
426 | ||
0df66d57 EB |
427 | if ( vvp->snapshot_buffer ) |
428 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
429 | ||
50a14534 EB |
430 | if ( vvp->background_gc ) |
431 | g_object_unref ( G_OBJECT ( vvp->background_gc ) ); | |
432 | ||
480fb7e1 RN |
433 | if ( vvp->highlight_gc ) |
434 | g_object_unref ( G_OBJECT ( vvp->highlight_gc ) ); | |
435 | ||
4e485bf3 QT |
436 | if ( vvp->scale_bg_gc ) { |
437 | g_object_unref ( G_OBJECT ( vvp->scale_bg_gc ) ); | |
438 | vvp->scale_bg_gc = NULL; | |
439 | } | |
440 | ||
50a14534 EB |
441 | G_OBJECT_CLASS(parent_class)->finalize(gob); |
442 | } | |
443 | ||
33e0e500 GB |
444 | /** |
445 | * vik_viewport_clear: | |
446 | * @vvp: self object | |
447 | * | |
448 | * Clear the whole viewport. | |
449 | */ | |
50a14534 EB |
450 | void vik_viewport_clear ( VikViewport *vvp ) |
451 | { | |
452 | g_return_if_fail ( vvp != NULL ); | |
453 | gdk_draw_rectangle(GDK_DRAWABLE(vvp->scr_buffer), vvp->background_gc, TRUE, 0, 0, vvp->width, vvp->height); | |
82aa018d | 454 | vik_viewport_reset_copyrights ( vvp ); |
26336cf0 | 455 | vik_viewport_reset_logos ( vvp ); |
50a14534 EB |
456 | } |
457 | ||
33e0e500 GB |
458 | /** |
459 | * vik_viewport_set_draw_scale: | |
460 | * @vvp: self | |
461 | * @draw_scale: new value | |
462 | * | |
463 | * Enable/Disable display of scale. | |
464 | */ | |
35c7c0ba EB |
465 | void vik_viewport_set_draw_scale ( VikViewport *vvp, gboolean draw_scale ) |
466 | { | |
467 | vvp->draw_scale = draw_scale; | |
468 | } | |
469 | ||
470 | gboolean vik_viewport_get_draw_scale ( VikViewport *vvp ) | |
471 | { | |
472 | return vvp->draw_scale; | |
473 | } | |
474 | ||
acaf7113 AF |
475 | void vik_viewport_draw_scale ( VikViewport *vvp ) |
476 | { | |
c53eda9a GB |
477 | g_return_if_fail ( vvp != NULL ); |
478 | ||
35c7c0ba EB |
479 | if ( vvp->draw_scale ) { |
480 | VikCoord left, right; | |
481 | gdouble unit, base, diff, old_unit, old_diff, ratio; | |
26336cf0 | 482 | gint odd, len, SCSIZE = 5, HEIGHT=10; |
35c7c0ba EB |
483 | PangoLayout *pl; |
484 | gchar s[128]; | |
acaf7113 | 485 | |
8655fb85 RN |
486 | vik_viewport_screen_to_coord ( vvp, 0, vvp->height/2, &left ); |
487 | vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height/2, &right ); | |
acaf7113 | 488 | |
6f9336aa RN |
489 | vik_units_distance_t dist_units = a_vik_get_units_distance (); |
490 | switch (dist_units) { | |
491 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
492 | base = vik_coord_diff ( &left, &right ); // in meters | |
493 | break; | |
494 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a | 495 | // in 0.1 miles (copes better when zoomed in as 1 mile can be too big) |
433b3f7f | 496 | base = VIK_METERS_TO_MILES(vik_coord_diff ( &left, &right )) * 10.0; |
6f9336aa | 497 | break; |
b22233bd RN |
498 | case VIK_UNITS_DISTANCE_NAUTICAL_MILES: |
499 | // in 0.1 NM (copes better when zoomed in as 1 NM can be too big) | |
500 | base = VIK_METERS_TO_NAUTICAL_MILES(vik_coord_diff ( &left, &right )) * 10.0; | |
501 | break; | |
6f9336aa RN |
502 | default: |
503 | base = 1; // Keep the compiler happy | |
504 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
505 | } | |
35c7c0ba | 506 | ratio = (vvp->width/SCSIZE)/base; |
acaf7113 | 507 | |
35c7c0ba EB |
508 | unit = 1; |
509 | diff = fabs(base-unit); | |
acaf7113 AF |
510 | old_unit = unit; |
511 | old_diff = diff; | |
35c7c0ba EB |
512 | odd = 1; |
513 | while (diff <= old_diff) { | |
514 | old_unit = unit; | |
515 | old_diff = diff; | |
516 | unit = unit * (odd%2 ? 5 : 2); | |
517 | diff = fabs(base-unit); | |
518 | odd++; | |
519 | } | |
520 | unit = old_unit; | |
521 | len = unit * ratio; | |
acaf7113 | 522 | |
4e485bf3 QT |
523 | /* white background */ |
524 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
525 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); | |
526 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
527 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); | |
528 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
529 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); | |
530 | /* black scale */ | |
ff37db21 | 531 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 532 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); |
ff37db21 | 533 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 534 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); |
ff37db21 | 535 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 536 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); |
35c7c0ba EB |
537 | if (odd%2) { |
538 | int i; | |
539 | for (i=1; i<5; i++) { | |
4e485bf3 | 540 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
3d4eb43b | 541 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-(HEIGHT/2)); |
ff37db21 | 542 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
3d4eb43b | 543 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-(HEIGHT/2)); |
35c7c0ba EB |
544 | } |
545 | } else { | |
546 | int i; | |
547 | for (i=1; i<10; i++) { | |
4e485bf3 QT |
548 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
549 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
ff37db21 | 550 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
35c7c0ba EB |
551 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
552 | } | |
acaf7113 | 553 | } |
35c7c0ba | 554 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); |
ff37db21 | 555 | pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc); |
35c7c0ba | 556 | |
6f9336aa RN |
557 | switch (dist_units) { |
558 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
559 | if (unit >= 1000) { | |
b22233bd | 560 | sprintf(s, "%d km", (int)unit/1000); |
6f9336aa | 561 | } else { |
b22233bd | 562 | sprintf(s, "%d m", (int)unit); |
6f9336aa RN |
563 | } |
564 | break; | |
565 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a RN |
566 | // Handle units in 0.1 miles |
567 | if (unit < 10.0) { | |
b22233bd RN |
568 | sprintf(s, "%0.1f miles", unit/10.0); |
569 | } | |
570 | else if ((int)unit == 10.0) { | |
571 | sprintf(s, "1 mile"); | |
572 | } | |
573 | else { | |
574 | sprintf(s, "%d miles", (int)(unit/10.0)); | |
575 | } | |
576 | break; | |
577 | case VIK_UNITS_DISTANCE_NAUTICAL_MILES: | |
578 | // Handle units in 0.1 NM | |
579 | if (unit < 10.0) { | |
580 | sprintf(s, "%0.1f NM", unit/10.0); | |
8d772d8a RN |
581 | } |
582 | else if ((int)unit == 10.0) { | |
b22233bd | 583 | sprintf(s, "1 NM"); |
6f9336aa RN |
584 | } |
585 | else { | |
b22233bd | 586 | sprintf(s, "%d NMs", (int)(unit/10.0)); |
6f9336aa RN |
587 | } |
588 | break; | |
589 | default: | |
590 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
acaf7113 | 591 | } |
35c7c0ba | 592 | pango_layout_set_text(pl, s, -1); |
ff37db21 | 593 | vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 594 | PAD + len + PAD, vvp->height - PAD - 10, pl); |
6278ccc6 | 595 | g_object_unref(pl); |
e6869c62 | 596 | pl = NULL; |
35c7c0ba | 597 | } |
acaf7113 AF |
598 | } |
599 | ||
82aa018d GB |
600 | void vik_viewport_draw_copyright ( VikViewport *vvp ) |
601 | { | |
602 | g_return_if_fail ( vvp != NULL ); | |
603 | ||
82aa018d GB |
604 | PangoLayout *pl; |
605 | PangoRectangle ink_rect, logical_rect; | |
606 | gchar s[128] = ""; | |
607 | ||
608 | /* compute copyrights string */ | |
609 | guint len = g_slist_length ( vvp->copyrights ); | |
15a0bd14 | 610 | |
82aa018d GB |
611 | int i; |
612 | for (i = 0 ; i < len ; i++) | |
613 | { | |
15a0bd14 RN |
614 | // Stop when buffer is full |
615 | int slen = strlen ( s ); | |
616 | if ( slen >= 127 ) | |
617 | break; | |
618 | ||
82aa018d | 619 | gchar *copyright = g_slist_nth_data ( vvp->copyrights, i ); |
15a0bd14 RN |
620 | |
621 | // Only use part of this copyright that fits in the available space left | |
622 | // remembering 1 character is left available for the appended space | |
623 | int clen = strlen ( copyright ); | |
624 | if ( slen + clen > 126 ) { | |
625 | clen = 126 - slen; | |
626 | } | |
627 | ||
628 | strncat ( s, copyright, clen ); | |
82aa018d GB |
629 | strcat ( s, " " ); |
630 | } | |
631 | ||
632 | /* create pango layout */ | |
633 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); | |
ff37db21 | 634 | pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc); |
82aa018d GB |
635 | pango_layout_set_alignment ( pl, PANGO_ALIGN_RIGHT ); |
636 | ||
637 | /* Set the text */ | |
638 | pango_layout_set_text(pl, s, -1); | |
639 | ||
640 | /* Use maximum of half the viewport width */ | |
56cb1807 | 641 | pango_layout_set_width ( pl, ( vvp->width / 2 ) * PANGO_SCALE ); |
82aa018d | 642 | pango_layout_get_pixel_extents(pl, &ink_rect, &logical_rect); |
ff37db21 | 643 | vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
56cb1807 | 644 | vvp->width / 2, vvp->height - logical_rect.height, pl); |
82aa018d GB |
645 | |
646 | /* Free memory */ | |
647 | g_object_unref(pl); | |
648 | pl = NULL; | |
649 | } | |
650 | ||
33e0e500 GB |
651 | /** |
652 | * vik_viewport_set_draw_centermark: | |
653 | * @vvp: self object | |
654 | * @draw_centermark: new value | |
655 | * | |
656 | * Enable/Disable display of center mark. | |
657 | */ | |
c933487f QT |
658 | void vik_viewport_set_draw_centermark ( VikViewport *vvp, gboolean draw_centermark ) |
659 | { | |
660 | vvp->draw_centermark = draw_centermark; | |
661 | } | |
662 | ||
663 | gboolean vik_viewport_get_draw_centermark ( VikViewport *vvp ) | |
664 | { | |
665 | return vvp->draw_centermark; | |
666 | } | |
667 | ||
668 | void vik_viewport_draw_centermark ( VikViewport *vvp ) | |
669 | { | |
c53eda9a GB |
670 | g_return_if_fail ( vvp != NULL ); |
671 | ||
c933487f QT |
672 | if ( !vvp->draw_centermark ) |
673 | return; | |
674 | ||
3df69a6b QT |
675 | const int len = 30; |
676 | const int gap = 4; | |
c933487f QT |
677 | int center_x = vvp->width/2; |
678 | int center_y = vvp->height/2; | |
ff37db21 | 679 | GdkGC * black_gc = gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc; |
c933487f QT |
680 | |
681 | /* white back ground */ | |
3df69a6b QT |
682 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x - len, center_y, center_x - gap, center_y); |
683 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x + gap, center_y, center_x + len, center_y); | |
684 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y - len, center_x, center_y - gap); | |
685 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f | 686 | /* black fore ground */ |
3df69a6b QT |
687 | vik_viewport_draw_line(vvp, black_gc, center_x - len, center_y, center_x - gap, center_y); |
688 | vik_viewport_draw_line(vvp, black_gc, center_x + gap, center_y, center_x + len, center_y); | |
689 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y - len, center_x, center_y - gap); | |
690 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f QT |
691 | |
692 | } | |
693 | ||
26336cf0 GB |
694 | void vik_viewport_draw_logo ( VikViewport *vvp ) |
695 | { | |
696 | g_return_if_fail ( vvp != NULL ); | |
697 | ||
26336cf0 GB |
698 | guint len = g_slist_length ( vvp->logos ); |
699 | gint x = vvp->width - PAD; | |
700 | gint y = PAD; | |
701 | int i; | |
702 | for (i = 0 ; i < len ; i++) | |
703 | { | |
704 | GdkPixbuf *logo = g_slist_nth_data ( vvp->logos, i ); | |
705 | gint width = gdk_pixbuf_get_width ( logo ); | |
706 | gint height = gdk_pixbuf_get_height ( logo ); | |
707 | vik_viewport_draw_pixbuf ( vvp, logo, 0, 0, x - width, y, width, height ); | |
708 | x = x - width - PAD; | |
709 | } | |
2afcef36 | 710 | } |
26336cf0 | 711 | |
2afcef36 RN |
712 | void vik_viewport_set_draw_highlight ( VikViewport *vvp, gboolean draw_highlight ) |
713 | { | |
714 | vvp->draw_highlight = draw_highlight; | |
715 | } | |
716 | ||
717 | gboolean vik_viewport_get_draw_highlight ( VikViewport *vvp ) | |
718 | { | |
719 | return vvp->draw_highlight; | |
26336cf0 GB |
720 | } |
721 | ||
50a14534 EB |
722 | void vik_viewport_sync ( VikViewport *vvp ) |
723 | { | |
724 | g_return_if_fail ( vvp != NULL ); | |
9b082b39 | 725 | 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 |
726 | } |
727 | ||
728 | void vik_viewport_pan_sync ( VikViewport *vvp, gint x_off, gint y_off ) | |
729 | { | |
acaf7113 AF |
730 | gint x, y, wid, hei; |
731 | ||
50a14534 | 732 | g_return_if_fail ( vvp != NULL ); |
9b082b39 | 733 | 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 |
734 | |
735 | if (x_off >= 0) { | |
736 | x = 0; | |
737 | wid = x_off; | |
738 | } else { | |
739 | x = vvp->width+x_off; | |
740 | wid = -x_off; | |
741 | } | |
742 | if (y_off >= 0) { | |
743 | y = 0; | |
744 | hei = y_off; | |
745 | } else { | |
746 | y = vvp->height+y_off; | |
747 | hei = -y_off; | |
748 | } | |
749 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), x, 0, wid, vvp->height); | |
750 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), 0, y, vvp->width, hei); | |
50a14534 EB |
751 | } |
752 | ||
753 | void vik_viewport_set_zoom ( VikViewport *vvp, gdouble xympp ) | |
754 | { | |
755 | g_return_if_fail ( vvp != NULL ); | |
a3603298 | 756 | if ( xympp >= VIK_VIEWPORT_MIN_ZOOM && xympp <= VIK_VIEWPORT_MAX_ZOOM ) { |
50a14534 | 757 | vvp->xmpp = vvp->ympp = xympp; |
a3603298 RN |
758 | // Since xmpp & ympp are the same it doesn't matter which one is used here |
759 | vvp->xmfactor = vvp->ymfactor = MERCATOR_FACTOR(vvp->xmpp); | |
760 | } | |
50a14534 EB |
761 | |
762 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
763 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
764 | } |
765 | ||
766 | /* or could do factor */ | |
767 | void vik_viewport_zoom_in ( VikViewport *vvp ) | |
768 | { | |
769 | g_return_if_fail ( vvp != NULL ); | |
770 | if ( vvp->xmpp >= (VIK_VIEWPORT_MIN_ZOOM*2) && vvp->ympp >= (VIK_VIEWPORT_MIN_ZOOM*2) ) | |
771 | { | |
772 | vvp->xmpp /= 2; | |
773 | vvp->ympp /= 2; | |
774 | ||
a3603298 RN |
775 | vvp->xmfactor = MERCATOR_FACTOR(vvp->xmpp); |
776 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); | |
777 | ||
50a14534 EB |
778 | viewport_utm_zone_check(vvp); |
779 | } | |
780 | } | |
781 | ||
782 | void vik_viewport_zoom_out ( VikViewport *vvp ) | |
783 | { | |
784 | g_return_if_fail ( vvp != NULL ); | |
785 | if ( vvp->xmpp <= (VIK_VIEWPORT_MAX_ZOOM/2) && vvp->ympp <= (VIK_VIEWPORT_MAX_ZOOM/2) ) | |
786 | { | |
787 | vvp->xmpp *= 2; | |
788 | vvp->ympp *= 2; | |
789 | ||
a3603298 RN |
790 | vvp->xmfactor = MERCATOR_FACTOR(vvp->xmpp); |
791 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); | |
792 | ||
50a14534 EB |
793 | viewport_utm_zone_check(vvp); |
794 | } | |
795 | } | |
796 | ||
797 | gdouble vik_viewport_get_zoom ( VikViewport *vvp ) | |
798 | { | |
799 | if ( vvp->xmpp == vvp->ympp ) | |
800 | return vvp->xmpp; | |
801 | return 0.0; | |
802 | } | |
803 | ||
804 | gdouble vik_viewport_get_xmpp ( VikViewport *vvp ) | |
805 | { | |
806 | return vvp->xmpp; | |
807 | } | |
808 | ||
809 | gdouble vik_viewport_get_ympp ( VikViewport *vvp ) | |
810 | { | |
811 | return vvp->ympp; | |
812 | } | |
813 | ||
814 | void vik_viewport_set_xmpp ( VikViewport *vvp, gdouble xmpp ) | |
815 | { | |
816 | if ( xmpp >= VIK_VIEWPORT_MIN_ZOOM && xmpp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
817 | vvp->xmpp = xmpp; | |
a3603298 | 818 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); |
50a14534 EB |
819 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) |
820 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
821 | } |
822 | } | |
823 | ||
824 | void vik_viewport_set_ympp ( VikViewport *vvp, gdouble ympp ) | |
825 | { | |
826 | if ( ympp >= VIK_VIEWPORT_MIN_ZOOM && ympp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
827 | vvp->ympp = ympp; | |
a3603298 | 828 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); |
50a14534 EB |
829 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) |
830 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
831 | } |
832 | } | |
833 | ||
834 | ||
835 | const VikCoord *vik_viewport_get_center ( VikViewport *vvp ) | |
836 | { | |
837 | g_return_val_if_fail ( vvp != NULL, NULL ); | |
838 | return &(vvp->center); | |
839 | } | |
840 | ||
841 | /* called every time we update coordinates/zoom */ | |
842 | static void viewport_utm_zone_check ( VikViewport *vvp ) | |
843 | { | |
844 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
845 | { | |
846 | struct UTM utm; | |
847 | struct LatLon ll; | |
848 | a_coords_utm_to_latlon ( (struct UTM *) &(vvp->center), &ll ); | |
849 | a_coords_latlon_to_utm ( &ll, &utm ); | |
850 | if ( utm.zone != vvp->center.utm_zone ) | |
851 | *((struct UTM *)(&vvp->center)) = utm; | |
852 | ||
853 | /* misc. stuff so we don't have to check later */ | |
854 | vvp->utm_zone_width = viewport_utm_zone_width ( vvp ); | |
855 | vvp->one_utm_zone = ( vik_viewport_rightmost_zone(vvp) == vik_viewport_leftmost_zone(vvp) ); | |
856 | } | |
857 | } | |
858 | ||
be5554c5 RN |
859 | /** |
860 | * Free an individual center position in the history list | |
861 | */ | |
862 | static void free_center ( VikViewport *vvp, guint index ) | |
863 | { | |
864 | VikCoord *coord = g_list_nth_data ( vvp->centers, index ); | |
865 | if ( coord ) | |
866 | g_free ( coord ); | |
867 | GList *gl = g_list_nth ( vvp->centers, index ); | |
868 | if ( gl ) | |
869 | vvp->centers = g_list_delete_link ( vvp->centers, gl ); | |
870 | } | |
871 | ||
872 | /** | |
873 | * Free a set of center positions in the history list, | |
874 | * from the indicated start index to the end of the list | |
875 | */ | |
876 | static void free_centers ( VikViewport *vvp, guint start ) | |
877 | { | |
878 | // Have to work backward since we delete items referenced by the '_nth()' values, | |
879 | // otherwise if processed forward - removing the lower nth index entries would change the subsequent indexing | |
880 | for ( guint i = g_list_length(vvp->centers)-1; i > start; i-- ) | |
881 | free_center ( vvp, i ); | |
882 | } | |
883 | ||
884 | /** | |
885 | * Store the current center position into the history list | |
886 | * and emit a signal to notify clients the list has been updated | |
887 | */ | |
888 | static void update_centers ( VikViewport *vvp ) | |
889 | { | |
890 | VikCoord *new_center = g_malloc(sizeof (VikCoord)); | |
891 | *new_center = vvp->center; | |
892 | ||
893 | if ( vvp->centers_index ) { | |
894 | ||
895 | if ( vvp->centers_index == vvp->centers_max-1 ) { | |
896 | // List is full, so drop the oldest value to make room for the new one | |
897 | free_center ( vvp, 0 ); | |
898 | vvp->centers_index--; | |
899 | } | |
900 | else { | |
901 | // Reset the now unused section of the list | |
902 | // Free from the index to the end | |
903 | free_centers ( vvp, vvp->centers_index+1 ); | |
904 | } | |
905 | ||
906 | } | |
907 | ||
908 | // Store new position | |
909 | // NB ATM this can be the same location as the last one in the list | |
910 | vvp->centers = g_list_append ( vvp->centers, new_center ); | |
911 | ||
912 | // Reset to the end (NB should be same as centers_index++) | |
913 | vvp->centers_index = g_list_length ( vvp->centers ) - 1; | |
914 | ||
915 | // Inform interested subscribers that this change has occurred | |
916 | g_signal_emit ( G_OBJECT(vvp), viewport_signals[VW_UPDATED_CENTER_SIGNAL], 0 ); | |
917 | } | |
918 | ||
fca1f3ad RN |
919 | /** |
920 | * Show the list of forward/backward positions | |
921 | * ATM only for debug usage | |
922 | */ | |
923 | void vik_viewport_show_centers ( VikViewport *vvp, GtkWindow *parent ) | |
924 | { | |
925 | GList* node = NULL; | |
926 | GList* texts = NULL; | |
927 | gint index = 0; | |
928 | for (node = vvp->centers; node != NULL; node = g_list_next(node)) { | |
929 | gchar *lat = NULL, *lon = NULL; | |
930 | struct LatLon ll; | |
931 | vik_coord_to_latlon (node->data, &ll); | |
932 | a_coords_latlon_to_string ( &ll, &lat, &lon ); | |
933 | gchar *extra = NULL; | |
934 | if ( index == vvp->centers_index-1 ) | |
935 | extra = g_strdup ( " [Back]" ); | |
936 | else if ( index == vvp->centers_index+1 ) | |
937 | extra = g_strdup ( " [Forward]" ); | |
938 | else | |
939 | extra = g_strdup ( "" ); | |
940 | texts = g_list_prepend ( texts , g_strdup_printf ( "%s %s%s", lat, lon, extra ) ); | |
941 | g_free ( lat ); | |
942 | g_free ( lon ); | |
943 | g_free ( extra ); | |
944 | index++; | |
945 | } | |
946 | ||
947 | // NB: No i18n as this is just for debug | |
948 | // Using this function the dialog allows sorting of the list which isn't appropriate here | |
949 | // but this doesn't matter much for debug purposes of showing stuff... | |
950 | GList *ans = a_dialog_select_from_list(parent, | |
951 | texts, | |
952 | FALSE, | |
953 | "Back/Forward Locations", | |
954 | "Back/Forward Locations"); | |
955 | for (node = ans; node != NULL; node = g_list_next(node)) | |
956 | g_free(node->data); | |
957 | g_list_free(ans); | |
958 | for (node = texts; node != NULL; node = g_list_next(node)) | |
959 | g_free(node->data); | |
960 | g_list_free(texts); | |
961 | } | |
962 | ||
be5554c5 RN |
963 | /** |
964 | * vik_viewport_go_back: | |
965 | * | |
966 | * Move back in the position history | |
967 | * | |
968 | * Returns: %TRUE one success | |
969 | */ | |
970 | gboolean vik_viewport_go_back ( VikViewport *vvp ) | |
971 | { | |
972 | // see if the current position is different from the last saved center position within a certain radius | |
973 | VikCoord *center = g_list_nth_data ( vvp->centers, vvp->centers_index ); | |
974 | if ( center ) { | |
975 | // Consider an exclusion size (should it zoom level dependent, rather than a fixed value?) | |
976 | // When still near to the last saved position we'll jump over it to the one before | |
977 | if ( vik_coord_diff ( center, &vvp->center ) > vvp->centers_radius ) { | |
978 | ||
979 | if ( vvp->centers_index == g_list_length(vvp->centers)-1 ) { | |
980 | // Only when we haven't already moved back in the list | |
981 | // Remember where this request came from | |
982 | // (alternatively we could insert in the list on every back attempt) | |
983 | update_centers ( vvp ); | |
984 | } | |
985 | ||
986 | } | |
987 | // 'Go back' if possible | |
988 | // NB if we inserted a position above, then this will then move to the last saved position | |
989 | // otherwise this will skip to the previous saved position, as it's probably somewhere else. | |
990 | if ( vvp->centers_index > 0 ) | |
991 | vvp->centers_index--; | |
992 | } | |
993 | else { | |
994 | return FALSE; | |
995 | } | |
996 | ||
997 | VikCoord *new_center = g_list_nth_data ( vvp->centers, vvp->centers_index ); | |
998 | if ( new_center ) { | |
999 | vik_viewport_set_center_coord ( vvp, new_center, FALSE ); | |
1000 | return TRUE; | |
1001 | } | |
1002 | return FALSE; | |
1003 | } | |
1004 | ||
1005 | /** | |
1006 | * vik_viewport_go_forward: | |
1007 | * | |
1008 | * Move forward in the position history | |
1009 | * | |
1010 | * Returns: %TRUE one success | |
1011 | */ | |
1012 | gboolean vik_viewport_go_forward ( VikViewport *vvp ) | |
1013 | { | |
1014 | if ( vvp->centers_index == vvp->centers_max-1 ) | |
1015 | return FALSE; | |
1016 | ||
1017 | vvp->centers_index++; | |
1018 | VikCoord *new_center = g_list_nth_data ( vvp->centers, vvp->centers_index ); | |
1019 | if ( new_center ) { | |
1020 | vik_viewport_set_center_coord ( vvp, new_center, FALSE ); | |
1021 | return TRUE; | |
1022 | } | |
1023 | else | |
1024 | // Set to end of list | |
1025 | vvp->centers_index = g_list_length(vvp->centers) - 1; | |
1026 | ||
1027 | return FALSE; | |
1028 | } | |
1029 | ||
1030 | /** | |
1031 | * vik_viewport_back_available: | |
1032 | * | |
1033 | * Returns: %TRUE when a previous position in the history is available | |
1034 | */ | |
1035 | gboolean vik_viewport_back_available ( const VikViewport *vvp ) | |
1036 | { | |
1037 | return ( vvp->centers_index > 0 ); | |
1038 | } | |
1039 | ||
1040 | /** | |
1041 | * vik_viewport_forward_available: | |
1042 | * | |
1043 | * Returns: %TRUE when a next position in the history is available | |
1044 | */ | |
1045 | gboolean vik_viewport_forward_available ( const VikViewport *vvp ) | |
1046 | { | |
1047 | return ( vvp->centers_index < g_list_length(vvp->centers)-1 ); | |
1048 | } | |
1049 | ||
1050 | /** | |
1051 | * vik_viewport_set_center_latlon: | |
1052 | * @vvp: The viewport to reposition. | |
1053 | * @ll: The new center position in Lat/Lon format | |
1054 | * @save_position: Whether this new position should be saved into the history of positions | |
1055 | * Normally only specific user requests should be saved (i.e. to not include Pan and Zoom repositions) | |
1056 | */ | |
1057 | void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll, gboolean save_position ) | |
50a14534 EB |
1058 | { |
1059 | vik_coord_load_from_latlon ( &(vvp->center), vvp->coord_mode, ll ); | |
be5554c5 RN |
1060 | if ( save_position ) |
1061 | update_centers ( vvp ); | |
50a14534 EB |
1062 | if ( vvp->coord_mode == VIK_COORD_UTM ) |
1063 | viewport_utm_zone_check ( vvp ); | |
1064 | } | |
1065 | ||
be5554c5 RN |
1066 | /** |
1067 | * vik_viewport_set_center_utm: | |
1068 | * @vvp: The viewport to reposition. | |
1069 | * @utm: The new center position in UTM format | |
1070 | * @save_position: Whether this new position should be saved into the history of positions | |
1071 | * Normally only specific user requests should be saved (i.e. to not include Pan and Zoom repositions) | |
1072 | */ | |
1073 | void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm, gboolean save_position ) | |
50a14534 EB |
1074 | { |
1075 | vik_coord_load_from_utm ( &(vvp->center), vvp->coord_mode, utm ); | |
be5554c5 RN |
1076 | if ( save_position ) |
1077 | update_centers ( vvp ); | |
50a14534 EB |
1078 | if ( vvp->coord_mode == VIK_COORD_UTM ) |
1079 | viewport_utm_zone_check ( vvp ); | |
1080 | } | |
1081 | ||
be5554c5 RN |
1082 | /** |
1083 | * vik_viewport_set_center_coord: | |
1084 | * @vvp: The viewport to reposition. | |
1085 | * @coord: The new center position in a VikCoord type | |
1086 | * @save_position: Whether this new position should be saved into the history of positions | |
1087 | * Normally only specific user requests should be saved (i.e. to not include Pan and Zoom repositions) | |
1088 | */ | |
1089 | void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord, gboolean save_position ) | |
50a14534 EB |
1090 | { |
1091 | vvp->center = *coord; | |
be5554c5 RN |
1092 | if ( save_position ) |
1093 | update_centers ( vvp ); | |
50a14534 EB |
1094 | if ( vvp->coord_mode == VIK_COORD_UTM ) |
1095 | viewport_utm_zone_check ( vvp ); | |
1096 | } | |
1097 | ||
1098 | void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br ) | |
1099 | { | |
1100 | g_return_if_fail ( vvp->coord_mode == VIK_COORD_UTM ); | |
1101 | ||
1102 | /* get center, then just offset */ | |
1103 | vik_viewport_center_for_zonen ( vvp, VIK_UTM(ul), zone ); | |
1104 | ul->mode = VIK_COORD_UTM; | |
1105 | *br = *ul; | |
1106 | ||
1107 | ul->north_south += (vvp->ympp * vvp->height / 2); | |
1108 | ul->east_west -= (vvp->xmpp * vvp->width / 2); | |
1109 | br->north_south -= (vvp->ympp * vvp->height / 2); | |
1110 | br->east_west += (vvp->xmpp * vvp->width / 2); | |
1111 | } | |
1112 | ||
1113 | void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone) | |
1114 | { | |
1115 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1116 | *center = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
1117 | center->easting -= ( zone - center->zone ) * vvp->utm_zone_width; | |
1118 | center->zone = zone; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | gchar vik_viewport_leftmost_zone ( VikViewport *vvp ) | |
1123 | { | |
1124 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1125 | VikCoord coord; | |
1126 | g_assert ( vvp != NULL ); | |
1127 | vik_viewport_screen_to_coord ( vvp, 0, 0, &coord ); | |
1128 | return coord.utm_zone; | |
1129 | } | |
1130 | return '\0'; | |
1131 | } | |
1132 | ||
1133 | gchar vik_viewport_rightmost_zone ( VikViewport *vvp ) | |
1134 | { | |
1135 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1136 | VikCoord coord; | |
1137 | g_assert ( vvp != NULL ); | |
1138 | vik_viewport_screen_to_coord ( vvp, vvp->width, 0, &coord ); | |
1139 | return coord.utm_zone; | |
1140 | } | |
1141 | return '\0'; | |
1142 | } | |
1143 | ||
1144 | ||
1145 | void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y ) | |
1146 | { | |
1147 | g_return_if_fail ( vvp != NULL ); | |
1148 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1149 | /* slightly optimized */ | |
1150 | vvp->center.east_west += vvp->xmpp * (x - (vvp->width/2)); | |
1151 | vvp->center.north_south += vvp->ympp * ((vvp->height/2) - y); | |
1152 | viewport_utm_zone_check ( vvp ); | |
1153 | } else { | |
1154 | VikCoord tmp; | |
1155 | vik_viewport_screen_to_coord ( vvp, x, y, &tmp ); | |
be5554c5 | 1156 | vik_viewport_set_center_coord ( vvp, &tmp, FALSE ); |
50a14534 EB |
1157 | } |
1158 | } | |
1159 | ||
1160 | gint vik_viewport_get_width( VikViewport *vvp ) | |
1161 | { | |
1162 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
1163 | return vvp->width; | |
1164 | } | |
1165 | ||
1166 | gint vik_viewport_get_height( VikViewport *vvp ) | |
1167 | { | |
1168 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
1169 | return vvp->height; | |
1170 | } | |
1171 | ||
1172 | void vik_viewport_screen_to_coord ( VikViewport *vvp, int x, int y, VikCoord *coord ) | |
1173 | { | |
c53eda9a GB |
1174 | g_return_if_fail ( vvp != NULL ); |
1175 | ||
50a14534 EB |
1176 | if ( vvp->coord_mode == VIK_COORD_UTM ) { |
1177 | int zone_delta; | |
1178 | struct UTM *utm = (struct UTM *) coord; | |
1179 | coord->mode = VIK_COORD_UTM; | |
1180 | ||
50a14534 EB |
1181 | utm->zone = vvp->center.utm_zone; |
1182 | utm->letter = vvp->center.utm_letter; | |
a3603298 | 1183 | utm->easting = ( ( x - ( vvp->width_2) ) * vvp->xmpp ) + vvp->center.east_west; |
50a14534 EB |
1184 | zone_delta = floor( (utm->easting - EASTING_OFFSET ) / vvp->utm_zone_width + 0.5 ); |
1185 | utm->zone += zone_delta; | |
1186 | utm->easting -= zone_delta * vvp->utm_zone_width; | |
a3603298 | 1187 | utm->northing = ( ( ( vvp->height_2) - y ) * vvp->ympp ) + vvp->center.north_south; |
50a14534 EB |
1188 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { |
1189 | coord->mode = VIK_COORD_LATLON; | |
d587678a | 1190 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
a3603298 RN |
1191 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width_2)); |
1192 | coord->north_south = vvp->center.north_south + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height_2 - y)); | |
d587678a | 1193 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) |
a3603298 | 1194 | 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 | 1195 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
a3603298 RN |
1196 | /* This isn't called with a high frequently so less need to optimize */ |
1197 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width_2)); | |
1198 | coord->north_south = DEMERCLAT ( MERCLAT(vvp->center.north_south) + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height_2 - y)) ); | |
50a14534 EB |
1199 | } |
1200 | } | |
1201 | } | |
1202 | ||
a3603298 RN |
1203 | /* |
1204 | * Since this function is used for every drawn trackpoint - it can get called alot | |
1205 | * Thus x & y position factors are calculated once on zoom changes, | |
1206 | * avoiding the need to do it here all the time. | |
1207 | * For good measure the half width and height values are also pre calculated too. | |
1208 | */ | |
50a14534 EB |
1209 | void vik_viewport_coord_to_screen ( VikViewport *vvp, const VikCoord *coord, int *x, int *y ) |
1210 | { | |
1211 | static VikCoord tmp; | |
1212 | g_return_if_fail ( vvp != NULL ); | |
1213 | ||
1214 | if ( coord->mode != vvp->coord_mode ) | |
1215 | { | |
1216 | g_warning ( "Have to convert in vik_viewport_coord_to_screen! This should never happen!"); | |
1217 | vik_coord_copy_convert ( coord, vvp->coord_mode, &tmp ); | |
1218 | coord = &tmp; | |
1219 | } | |
1220 | ||
1221 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1222 | struct UTM *center = (struct UTM *) &(vvp->center); | |
1223 | struct UTM *utm = (struct UTM *) coord; | |
1224 | if ( center->zone != utm->zone && vvp->one_utm_zone ) | |
1225 | { | |
1226 | *x = *y = VIK_VIEWPORT_UTM_WRONG_ZONE; | |
1227 | return; | |
1228 | } | |
1229 | ||
a3603298 | 1230 | *x = ( (utm->easting - center->easting) / vvp->xmpp ) + (vvp->width_2) - |
50a14534 | 1231 | (center->zone - utm->zone ) * vvp->utm_zone_width / vvp->xmpp; |
a3603298 | 1232 | *y = (vvp->height_2) - ( (utm->northing - center->northing) / vvp->ympp ); |
50a14534 EB |
1233 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { |
1234 | struct LatLon *center = (struct LatLon *) &(vvp->center); | |
1235 | struct LatLon *ll = (struct LatLon *) coord; | |
1236 | double xx,yy; | |
d587678a | 1237 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
a3603298 RN |
1238 | *x = vvp->width_2 + ( MERCATOR_FACTOR(vvp->xmpp) * (ll->lon - center->lon) ); |
1239 | *y = vvp->height_2 + ( MERCATOR_FACTOR(vvp->ympp) * (center->lat - ll->lat) ); | |
d587678a | 1240 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) { |
a3603298 | 1241 | 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 | 1242 | *x = xx; *y = yy; |
50a14534 | 1243 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
a3603298 RN |
1244 | *x = vvp->width_2 + ( MERCATOR_FACTOR(vvp->xmpp) * (ll->lon - center->lon) ); |
1245 | *y = vvp->height_2 + ( MERCATOR_FACTOR(vvp->ympp) * ( MERCLAT(center->lat) - MERCLAT(ll->lat) ) ); | |
50a14534 EB |
1246 | } |
1247 | } | |
1248 | } | |
1249 | ||
5d325845 RN |
1250 | // Clip functions continually reduce the value by a factor until it is in the acceptable range |
1251 | // whilst also scaling the other coordinate value. | |
1252 | static void clip_x ( gint *x1, gint *y1, gint *x2, gint *y2 ) | |
d9ffd267 | 1253 | { |
5d325845 RN |
1254 | while ( ABS(*x1) > 32768 ) { |
1255 | *x1 = *x2 + (0.5 * (*x1-*x2)); | |
1256 | *y1 = *y2 + (0.5 * (*y1-*y2)); | |
d9ffd267 EB |
1257 | } |
1258 | } | |
1259 | ||
5d325845 RN |
1260 | static void clip_y ( gint *x1, gint *y1, gint *x2, gint *y2 ) |
1261 | { | |
1262 | while ( ABS(*y1) > 32767 ) { | |
1263 | *x1 = *x2 + (0.5 * (*x1-*x2)); | |
1264 | *y1 = *y2 + (0.5 * (*y1-*y2)); | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | /** | |
1269 | * a_viewport_clip_line: | |
1270 | * @x1: screen coord | |
1271 | * @y1: screen coord | |
1272 | * @x2: screen coord | |
1273 | * @y2: screen coord | |
1274 | * | |
1275 | * Due to the seemingly undocumented behaviour of gdk_draw_line(), we need to restrict the range of values passed in. | |
1276 | * So despite it accepting gints, the effective range seems to be the actually the minimum C int range (2^16). | |
1277 | * This seems to be limitations coming from the X Window System. | |
1278 | * | |
1279 | * See http://www.rahul.net/kenton/40errs.html | |
1280 | * ERROR 7. Boundary conditions. | |
1281 | * "The X coordinate space is not infinite. | |
1282 | * Most drawing functions limit position, width, and height to 16 bit integers (sometimes signed, sometimes unsigned) of accuracy. | |
1283 | * Because most C compilers use 32 bit integers, Xlib will not complain if you exceed the 16 bit limit, but your results will usually not be what you expected. | |
1284 | * You should be especially careful of this if you are implementing higher level scalable graphics packages." | |
1285 | * | |
1286 | * This function should be called before calling gdk_draw_line(). | |
1287 | */ | |
1288 | void a_viewport_clip_line ( gint *x1, gint *y1, gint *x2, gint *y2 ) | |
1289 | { | |
1290 | if ( *x1 > 32768 || *x1 < -32767 ) | |
1291 | clip_x ( x1, y1, x2, y2 ); | |
1292 | if ( *y1 > 32768 || *y1 < -32767 ) | |
1293 | clip_y ( x1, y1, x2, y2 ); | |
1294 | if ( *x2 > 32768 || *x2 < -32767 ) | |
1295 | clip_x ( x2, y2, x1, y1 ); | |
1296 | if ( *y2 > 32768 || *y2 < -32767 ) | |
1297 | clip_y ( x2, y2, x1, y1 ); | |
1298 | } | |
1299 | ||
50a14534 EB |
1300 | void vik_viewport_draw_line ( VikViewport *vvp, GdkGC *gc, gint x1, gint y1, gint x2, gint y2 ) |
1301 | { | |
1302 | if ( ! ( ( x1 < 0 && x2 < 0 ) || ( y1 < 0 && y2 < 0 ) || | |
d9ffd267 EB |
1303 | ( x1 > vvp->width && x2 > vvp->width ) || ( y1 > vvp->height && y2 > vvp->height ) ) ) { |
1304 | /*** clipping, yeah! ***/ | |
1305 | a_viewport_clip_line ( &x1, &y1, &x2, &y2 ); | |
1306 | gdk_draw_line ( vvp->scr_buffer, gc, x1, y1, x2, y2); | |
1307 | } | |
50a14534 EB |
1308 | } |
1309 | ||
1310 | void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 ) | |
1311 | { | |
add30ebe RN |
1312 | // Using 32 as half the default waypoint image size, so this draws ensures the highlight gets done |
1313 | if ( x1 > -32 && x1 < vvp->width + 32 && y1 > -32 && y1 < vvp->height + 32 ) | |
50a14534 EB |
1314 | gdk_draw_rectangle ( vvp->scr_buffer, gc, filled, x1, y1, x2, y2); |
1315 | } | |
1316 | ||
1317 | void vik_viewport_draw_string ( VikViewport *vvp, GdkFont *font, GdkGC *gc, gint x1, gint y1, const gchar *string ) | |
1318 | { | |
1319 | if ( x1 > -100 && x1 < vvp->width + 100 && y1 > -100 && y1 < vvp->height + 100 ) | |
1320 | gdk_draw_string ( vvp->scr_buffer, font, gc, x1, y1, string ); | |
50a14534 EB |
1321 | } |
1322 | ||
1323 | void vik_viewport_draw_pixbuf ( VikViewport *vvp, GdkPixbuf *pixbuf, gint src_x, gint src_y, | |
1324 | gint dest_x, gint dest_y, gint w, gint h ) | |
1325 | { | |
1326 | gdk_draw_pixbuf ( vvp->scr_buffer, | |
ff37db21 RN |
1327 | NULL, |
1328 | pixbuf, | |
50a14534 EB |
1329 | src_x, src_y, dest_x, dest_y, w, h, |
1330 | GDK_RGB_DITHER_NONE, 0, 0 ); | |
1331 | } | |
1332 | ||
1333 | void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2 ) | |
1334 | { | |
1335 | gdk_draw_arc ( vvp->scr_buffer, gc, filled, x, y, width, height, angle1, angle2 ); | |
1336 | } | |
1337 | ||
1338 | ||
1339 | void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints ) | |
1340 | { | |
1341 | gdk_draw_polygon ( vvp->scr_buffer, gc, filled, points, npoints ); | |
1342 | } | |
1343 | ||
1344 | VikCoordMode vik_viewport_get_coord_mode ( const VikViewport *vvp ) | |
1345 | { | |
1346 | g_assert ( vvp ); | |
1347 | return vvp->coord_mode; | |
1348 | } | |
1349 | ||
1350 | static void viewport_set_coord_mode ( VikViewport *vvp, VikCoordMode mode ) | |
1351 | { | |
1352 | g_return_if_fail ( vvp != NULL ); | |
1353 | vvp->coord_mode = mode; | |
1354 | vik_coord_convert ( &(vvp->center), mode ); | |
1355 | } | |
1356 | ||
1357 | /* Thanks GPSDrive */ | |
1358 | 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 ) | |
1359 | { | |
1360 | int px, py; | |
1361 | gdouble dif, lat, lon; | |
1362 | double Ra = Radius[90+(gint)zero_lat]; | |
1363 | ||
1364 | px = (mapSizeX2 - x) * pixelfact_x; | |
1365 | py = (-mapSizeY2 + y) * pixelfact_y; | |
1366 | ||
50a14534 EB |
1367 | lat = zero_lat - py / Ra; |
1368 | lon = | |
1369 | zero_long - | |
1370 | px / (Ra * | |
81765f5e | 1371 | cos (DEG2RAD(lat))); |
50a14534 | 1372 | |
81765f5e | 1373 | dif = lat * (1 - (cos (DEG2RAD(fabs (lon - zero_long))))); |
50a14534 EB |
1374 | lat = lat - dif / 1.5; |
1375 | lon = | |
1376 | zero_long - | |
1377 | px / (Ra * | |
81765f5e | 1378 | cos (DEG2RAD(lat))); |
50a14534 EB |
1379 | |
1380 | *lt = lat; | |
1381 | *lg = lon; | |
1382 | return (TRUE); | |
1383 | } | |
1384 | ||
1385 | /* Thanks GPSDrive */ | |
1386 | 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 ) | |
1387 | { | |
1388 | double dif; | |
1389 | double Ra; | |
1390 | gint mapSizeX = 2 * mapSizeX2; | |
1391 | gint mapSizeY = 2 * mapSizeY2; | |
1392 | ||
1393 | g_assert ( lt >= -90.0 && lt <= 90.0 ); | |
1394 | // lg *= rad2deg; // FIXME, optimize equations | |
1395 | // lt *= rad2deg; | |
1396 | Ra = Radius[90+(gint)lt]; | |
1397 | *x = Ra * | |
81765f5e | 1398 | cos (DEG2RAD(lt)) * (lg - zero_long); |
50a14534 | 1399 | *y = Ra * (lt - zero_lat); |
81765f5e | 1400 | dif = Ra * RAD2DEG(1 - (cos ((DEG2RAD(lg - zero_long))))); |
50a14534 EB |
1401 | *y = *y + dif / 1.85; |
1402 | *x = *x / pixelfact_x; | |
1403 | *y = *y / pixelfact_y; | |
1404 | *x = mapSizeX2 - *x; | |
1405 | *y += mapSizeY2; | |
1406 | if ((*x < 0)||(*x >= mapSizeX)||(*y < 0)||(*y >= mapSizeY)) | |
1407 | return (FALSE); | |
1408 | return (TRUE); | |
1409 | } | |
1410 | ||
1411 | static void viewport_init_ra() | |
1412 | { | |
1413 | static gboolean done_before = FALSE; | |
1414 | if ( !done_before ) | |
1415 | { | |
1416 | gint i; | |
1417 | for ( i = -90; i <= 90; i++) | |
81765f5e | 1418 | Radius[i+90] = calcR ( DEG2RAD((double)i) ); |
50a14534 EB |
1419 | done_before = TRUE; |
1420 | } | |
1421 | } | |
1422 | ||
1423 | double calcR (double lat) | |
1424 | { | |
1425 | double a = 6378.137, r, sc, x, y, z; | |
1426 | double e2 = 0.081082 * 0.081082; | |
1427 | /* | |
1428 | * the radius of curvature of an ellipsoidal Earth in the plane of the | |
1429 | * meridian is given by | |
1430 | * | |
1431 | * R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2) | |
1432 | * | |
1433 | * | |
1434 | * where a is the equatorial radius, b is the polar radius, and e is | |
1435 | * the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2) | |
1436 | * | |
1437 | * a = 6378 km (3963 mi) Equatorial radius (surface to center distance) | |
1438 | * b = 6356.752 km (3950 mi) Polar radius (surface to center distance) e | |
1439 | * = 0.081082 Eccentricity | |
1440 | */ | |
1441 | ||
81765f5e | 1442 | lat = DEG2RAD(lat); |
50a14534 EB |
1443 | sc = sin (lat); |
1444 | x = a * (1.0 - e2); | |
1445 | z = 1.0 - e2 * sc * sc; | |
1446 | y = pow (z, 1.5); | |
1447 | r = x / y; | |
1448 | r = r * 1000.0; | |
1449 | return r; | |
1450 | } | |
1451 | ||
1452 | gboolean vik_viewport_is_one_zone ( VikViewport *vvp ) | |
1453 | { | |
1454 | return vvp->coord_mode == VIK_COORD_UTM && vvp->one_utm_zone; | |
1455 | } | |
1456 | ||
1457 | void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout ) | |
1458 | { | |
1459 | if ( x > -100 && x < vvp->width + 100 && y > -100 && y < vvp->height + 100 ) | |
1460 | gdk_draw_layout ( vvp->scr_buffer, gc, x, y, layout ); | |
1461 | } | |
1462 | ||
1463 | void vik_gc_get_fg_color ( GdkGC *gc, GdkColor *dest ) | |
1464 | { | |
1465 | static GdkGCValues values; | |
1466 | gdk_gc_get_values ( gc, &values ); | |
1467 | gdk_colormap_query_color ( gdk_colormap_get_system(), values.foreground.pixel, dest ); | |
1468 | } | |
1469 | ||
1470 | GdkFunction vik_gc_get_function ( GdkGC *gc ) | |
1471 | { | |
1472 | static GdkGCValues values; | |
1473 | gdk_gc_get_values ( gc, &values ); | |
1474 | return values.function; | |
1475 | } | |
1476 | ||
1477 | void vik_viewport_set_drawmode ( VikViewport *vvp, VikViewportDrawMode drawmode ) | |
1478 | { | |
1479 | vvp->drawmode = drawmode; | |
1480 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
1481 | viewport_set_coord_mode ( vvp, VIK_COORD_UTM ); | |
1482 | else { | |
1483 | viewport_set_coord_mode ( vvp, VIK_COORD_LATLON ); | |
50a14534 EB |
1484 | } |
1485 | } | |
1486 | ||
1487 | VikViewportDrawMode vik_viewport_get_drawmode ( VikViewport *vvp ) | |
1488 | { | |
1489 | return vvp->drawmode; | |
1490 | } | |
1491 | ||
0df66d57 EB |
1492 | /******** triggering *******/ |
1493 | void vik_viewport_set_trigger ( VikViewport *vp, gpointer trigger ) | |
1494 | { | |
1495 | vp->trigger = trigger; | |
1496 | } | |
1497 | ||
1498 | gpointer vik_viewport_get_trigger ( VikViewport *vp ) | |
1499 | { | |
1500 | return vp->trigger; | |
1501 | } | |
1502 | ||
1503 | void vik_viewport_snapshot_save ( VikViewport *vp ) | |
1504 | { | |
1505 | gdk_draw_drawable ( vp->snapshot_buffer, vp->background_gc, vp->scr_buffer, 0, 0, 0, 0, -1, -1 ); | |
1506 | } | |
1507 | ||
1508 | void vik_viewport_snapshot_load ( VikViewport *vp ) | |
1509 | { | |
1510 | gdk_draw_drawable ( vp->scr_buffer, vp->background_gc, vp->snapshot_buffer, 0, 0, 0, 0, -1, -1 ); | |
1511 | } | |
1512 | ||
1513 | void vik_viewport_set_half_drawn(VikViewport *vp, gboolean half_drawn) | |
1514 | { | |
1515 | vp->half_drawn = half_drawn; | |
1516 | } | |
1517 | ||
1518 | gboolean vik_viewport_get_half_drawn( VikViewport *vp ) | |
1519 | { | |
1520 | return vp->half_drawn; | |
1521 | } | |
1522 | ||
7bc965c0 GB |
1523 | |
1524 | const gchar *vik_viewport_get_drawmode_name(VikViewport *vv, VikViewportDrawMode mode) | |
0c1044e9 | 1525 | { |
7bc965c0 | 1526 | const gchar *name = NULL; |
24277274 | 1527 | VikWindow *vw = NULL; |
7bc965c0 GB |
1528 | GtkWidget *mode_button; |
1529 | GtkWidget *label; | |
24277274 GB |
1530 | |
1531 | vw = VIK_WINDOW_FROM_WIDGET(vv); | |
1532 | mode_button = vik_window_get_drawmode_button(vw, mode); | |
7bc965c0 GB |
1533 | label = gtk_bin_get_child(GTK_BIN(mode_button)); |
1534 | ||
1535 | name = gtk_label_get_text ( GTK_LABEL(label) ); | |
314c1ccc | 1536 | |
7bc965c0 | 1537 | return name; |
314c1ccc QT |
1538 | |
1539 | } | |
7bc965c0 | 1540 | |
0c1044e9 EB |
1541 | void vik_viewport_get_min_max_lat_lon ( VikViewport *vp, gdouble *min_lat, gdouble *max_lat, gdouble *min_lon, gdouble *max_lon ) |
1542 | { | |
1543 | VikCoord tleft, tright, bleft, bright; | |
1544 | ||
1545 | vik_viewport_screen_to_coord ( vp, 0, 0, &tleft ); | |
1546 | vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright ); | |
1547 | vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft ); | |
1548 | vik_viewport_screen_to_coord ( vp, vp->width, vp->height, &bright ); | |
7bc965c0 | 1549 | |
0c1044e9 EB |
1550 | vik_coord_convert(&tleft, VIK_COORD_LATLON); |
1551 | vik_coord_convert(&tright, VIK_COORD_LATLON); | |
1552 | vik_coord_convert(&bleft, VIK_COORD_LATLON); | |
1553 | vik_coord_convert(&bright, VIK_COORD_LATLON); | |
1554 | ||
1555 | *max_lat = MAX(tleft.north_south, tright.north_south); | |
1556 | *min_lat = MIN(bleft.north_south, bright.north_south); | |
1557 | *max_lon = MAX(tright.east_west, bright.east_west); | |
1558 | *min_lon = MIN(tleft.east_west, bleft.east_west); | |
1559 | } | |
82aa018d GB |
1560 | |
1561 | void vik_viewport_reset_copyrights ( VikViewport *vp ) | |
1562 | { | |
1563 | g_return_if_fail ( vp != NULL ); | |
1564 | g_slist_foreach ( vp->copyrights, (GFunc)g_free, NULL ); | |
1565 | g_slist_free ( vp->copyrights ); | |
1566 | vp->copyrights = NULL; | |
1567 | } | |
1568 | ||
33e0e500 GB |
1569 | /** |
1570 | * vik_viewport_add_copyright: | |
1571 | * @vp: self object | |
1572 | * @copyright: new copyright to display | |
1573 | * | |
1574 | * Add a copyright to display on viewport. | |
1575 | */ | |
82aa018d GB |
1576 | void vik_viewport_add_copyright ( VikViewport *vp, const gchar *copyright ) |
1577 | { | |
1578 | g_return_if_fail ( vp != NULL ); | |
1579 | if ( copyright ) | |
1580 | { | |
bbbd639f | 1581 | GSList *found = g_slist_find_custom ( vp->copyrights, copyright, (GCompareFunc)strcmp ); |
82aa018d GB |
1582 | if ( found == NULL ) |
1583 | { | |
1584 | gchar *duple = g_strdup ( copyright ); | |
1585 | vp->copyrights = g_slist_prepend ( vp->copyrights, duple ); | |
1586 | } | |
1587 | } | |
1588 | } | |
26336cf0 GB |
1589 | |
1590 | void vik_viewport_reset_logos ( VikViewport *vp ) | |
1591 | { | |
1592 | g_return_if_fail ( vp != NULL ); | |
1593 | /* do not free elem */ | |
1594 | g_slist_free ( vp->logos ); | |
1595 | vp->logos = NULL; | |
1596 | } | |
1597 | ||
1598 | void vik_viewport_add_logo ( VikViewport *vp, const GdkPixbuf *logo ) | |
1599 | { | |
1600 | g_return_if_fail ( vp != NULL ); | |
1601 | if ( logo ) | |
1602 | { | |
1603 | GdkPixbuf *found = NULL; /* FIXME (GdkPixbuf*)g_slist_find_custom ( vp->logos, logo, (GCompareFunc)== ); */ | |
1604 | if ( found == NULL ) | |
1605 | { | |
1606 | vp->logos = g_slist_prepend ( vp->logos, (gpointer)logo ); | |
1607 | } | |
1608 | } | |
1609 | } | |
9a3538f5 GB |
1610 | |
1611 | /** | |
1612 | * vik_viewport_compute_bearing: | |
1613 | * @vp: self object | |
1614 | * @x1: screen coord | |
1615 | * @y1: screen coord | |
1616 | * @x2: screen coord | |
1617 | * @y2: screen coord | |
1618 | * @angle: bearing in Radian (output) | |
1619 | * @baseangle: UTM base angle in Radian (output) | |
1620 | * | |
1621 | * Compute bearing. | |
1622 | */ | |
1623 | void vik_viewport_compute_bearing ( VikViewport *vp, gint x1, gint y1, gint x2, gint y2, gdouble *angle, gdouble *baseangle ) | |
1624 | { | |
1625 | gdouble len = sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2)); | |
1626 | gdouble dx = (x2-x1)/len*10; | |
1627 | gdouble dy = (y2-y1)/len*10; | |
1628 | ||
1629 | *angle = atan2(dy, dx) + M_PI_2; | |
1630 | ||
1631 | if ( vik_viewport_get_drawmode ( vp ) == VIK_VIEWPORT_DRAWMODE_UTM) { | |
1632 | VikCoord test; | |
1633 | struct LatLon ll; | |
1634 | struct UTM u; | |
1635 | gint tx, ty; | |
1636 | ||
1637 | vik_viewport_screen_to_coord ( vp, x1, y1, &test ); | |
1638 | vik_coord_to_latlon ( &test, &ll ); | |
1639 | ll.lat += vik_viewport_get_ympp ( vp ) * vik_viewport_get_height ( vp ) / 11000.0; // about 11km per degree latitude | |
1640 | a_coords_latlon_to_utm ( &ll, &u ); | |
3e840d35 | 1641 | vik_coord_load_from_utm ( &test, VIK_COORD_UTM, &u ); |
9a3538f5 GB |
1642 | vik_viewport_coord_to_screen ( vp, &test, &tx, &ty ); |
1643 | ||
1644 | *baseangle = M_PI - atan2(tx-x1, ty-y1); | |
1645 | *angle -= *baseangle; | |
1646 | } | |
1647 | ||
1648 | if (*angle < 0) | |
1649 | *angle += 2*M_PI; | |
1650 | if (*angle > 2*M_PI) | |
1651 | *angle -= 2*M_PI; | |
1652 | } |