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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 EB |
87 | |
88 | GdkPixbuf *alpha_pixbuf; | |
89 | guint8 alpha_pixbuf_width; | |
90 | guint8 alpha_pixbuf_height; | |
91 | ||
92 | gdouble utm_zone_width; | |
93 | gboolean one_utm_zone; | |
94 | ||
95 | GdkGC *background_gc; | |
96 | GdkColor background_color; | |
4e485bf3 | 97 | GdkGC *scale_bg_gc; |
82aa018d GB |
98 | |
99 | GSList *copyrights; | |
26336cf0 | 100 | GSList *logos; |
82aa018d GB |
101 | |
102 | /* Wether or not display OSD info */ | |
35c7c0ba | 103 | gboolean draw_scale; |
c933487f | 104 | gboolean draw_centermark; |
2afcef36 | 105 | gboolean draw_highlight; |
480fb7e1 RN |
106 | GdkGC *highlight_gc; |
107 | GdkColor highlight_color; | |
50a14534 EB |
108 | |
109 | /* subset of coord types. lat lon can be plotted in 2 ways, google or exp. */ | |
110 | VikViewportDrawMode drawmode; | |
111 | ||
0df66d57 EB |
112 | /* trigger stuff */ |
113 | gpointer trigger; | |
114 | GdkPixmap *snapshot_buffer; | |
115 | gboolean half_drawn; | |
50a14534 EB |
116 | }; |
117 | ||
118 | static gdouble | |
119 | viewport_utm_zone_width ( VikViewport *vvp ) | |
120 | { | |
121 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
122 | struct LatLon ll; | |
123 | ||
124 | /* get latitude of screen bottom */ | |
125 | struct UTM utm = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
126 | utm.northing -= vvp -> height * vvp -> ympp / 2; | |
127 | a_coords_utm_to_latlon ( &utm, &ll ); | |
128 | ||
129 | /* boundary */ | |
130 | ll.lon = (utm.zone - 1) * 6 - 180 ; | |
131 | a_coords_latlon_to_utm ( &ll, &utm); | |
132 | return fabs ( utm.easting - EASTING_OFFSET ) * 2; | |
133 | } else | |
134 | return 0.0; | |
135 | } | |
136 | ||
be5554c5 RN |
137 | enum { |
138 | VW_UPDATED_CENTER_SIGNAL = 0, | |
139 | VW_LAST_SIGNAL, | |
140 | }; | |
141 | static guint viewport_signals[VW_LAST_SIGNAL] = { 0 }; | |
142 | ||
eb560cd6 | 143 | G_DEFINE_TYPE (VikViewport, vik_viewport, GTK_TYPE_DRAWING_AREA) |
50a14534 | 144 | |
eb560cd6 GB |
145 | static void |
146 | vik_viewport_class_init ( VikViewportClass *klass ) | |
50a14534 EB |
147 | { |
148 | /* Destructor */ | |
149 | GObjectClass *object_class; | |
150 | ||
151 | object_class = G_OBJECT_CLASS (klass); | |
152 | ||
153 | object_class->finalize = viewport_finalize; | |
154 | ||
155 | parent_class = g_type_class_peek_parent (klass); | |
be5554c5 RN |
156 | |
157 | viewport_signals[VW_UPDATED_CENTER_SIGNAL] = g_signal_new ( "updated_center", G_TYPE_FROM_CLASS (klass), | |
158 | G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (VikViewportClass, updated_center), NULL, NULL, | |
159 | g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); | |
50a14534 EB |
160 | } |
161 | ||
24277274 | 162 | VikViewport *vik_viewport_new () |
50a14534 | 163 | { |
a59e6eb9 | 164 | VikViewport *vv = VIK_VIEWPORT ( g_object_new ( VIK_VIEWPORT_TYPE, NULL ) ); |
a59e6eb9 | 165 | return vv; |
50a14534 EB |
166 | } |
167 | ||
7143d1e4 RN |
168 | #define VIK_SETTINGS_VIEW_LAST_LATITUDE "viewport_last_latitude" |
169 | #define VIK_SETTINGS_VIEW_LAST_LONGITUDE "viewport_last_longitude" | |
170 | #define VIK_SETTINGS_VIEW_LAST_ZOOM_X "viewport_last_zoom_xpp" | |
171 | #define VIK_SETTINGS_VIEW_LAST_ZOOM_Y "viewport_last_zoom_ypp" | |
be5554c5 RN |
172 | #define VIK_SETTINGS_VIEW_HISTORY_SIZE "viewport_history_size" |
173 | #define VIK_SETTINGS_VIEW_HISTORY_DIFF_DIST "viewport_history_diff_dist" | |
7143d1e4 | 174 | |
eb560cd6 GB |
175 | static void |
176 | vik_viewport_init ( VikViewport *vvp ) | |
50a14534 EB |
177 | { |
178 | viewport_init_ra(); | |
179 | ||
5210c3d3 GB |
180 | struct UTM utm; |
181 | struct LatLon ll; | |
182 | ll.lat = a_vik_get_default_lat(); | |
183 | ll.lon = a_vik_get_default_long(); | |
7143d1e4 RN |
184 | gdouble zoom_x = 4.0; |
185 | gdouble zoom_y = 4.0; | |
186 | ||
187 | if ( a_vik_get_startup_method ( ) == VIK_STARTUP_METHOD_LAST_LOCATION ) { | |
188 | gdouble lat, lon, dzoom; | |
189 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_LATITUDE, &lat ) ) | |
190 | ll.lat = lat; | |
191 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_LONGITUDE, &lon ) ) | |
192 | ll.lon = lon; | |
193 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_X, &dzoom ) ) | |
194 | zoom_x = dzoom; | |
195 | if ( a_settings_get_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_Y, &dzoom ) ) | |
196 | zoom_y = dzoom; | |
197 | } | |
198 | ||
5210c3d3 GB |
199 | a_coords_latlon_to_utm ( &ll, &utm ); |
200 | ||
7143d1e4 RN |
201 | vvp->xmpp = zoom_x; |
202 | vvp->ympp = zoom_y; | |
a3603298 RN |
203 | vvp->xmfactor = MERCATOR_FACTOR (vvp->xmpp); |
204 | vvp->ymfactor = MERCATOR_FACTOR (vvp->ympp); | |
6a9ff0ee QT |
205 | vvp->coord_mode = VIK_COORD_LATLON; |
206 | vvp->drawmode = VIK_VIEWPORT_DRAWMODE_MERCATOR; | |
ee180665 | 207 | vvp->center.mode = VIK_COORD_LATLON; |
5210c3d3 GB |
208 | vvp->center.north_south = ll.lat; |
209 | vvp->center.east_west = ll.lon; | |
210 | vvp->center.utm_zone = (int)utm.zone; | |
211 | vvp->center.utm_letter = utm.letter; | |
50a14534 EB |
212 | vvp->scr_buffer = NULL; |
213 | vvp->alpha_pixbuf = NULL; | |
214 | vvp->alpha_pixbuf_width = vvp->alpha_pixbuf_height = 0; | |
215 | vvp->utm_zone_width = 0.0; | |
216 | vvp->background_gc = NULL; | |
480fb7e1 | 217 | vvp->highlight_gc = NULL; |
4e485bf3 | 218 | vvp->scale_bg_gc = NULL; |
82aa018d GB |
219 | |
220 | vvp->copyrights = NULL; | |
be5554c5 RN |
221 | vvp->centers = NULL; |
222 | vvp->centers_index = 0; | |
223 | vvp->centers_max = 20; | |
224 | gint tmp = vvp->centers_max; | |
225 | if ( a_settings_get_integer ( VIK_SETTINGS_VIEW_HISTORY_SIZE, &tmp ) ) | |
226 | vvp->centers_max = tmp; | |
227 | vvp->centers_radius = 500; | |
228 | if ( a_settings_get_integer ( VIK_SETTINGS_VIEW_HISTORY_DIFF_DIST, &tmp ) ) | |
229 | vvp->centers_radius = tmp; | |
82aa018d | 230 | |
35c7c0ba | 231 | vvp->draw_scale = TRUE; |
c933487f | 232 | vvp->draw_centermark = TRUE; |
2afcef36 | 233 | vvp->draw_highlight = TRUE; |
0df66d57 EB |
234 | |
235 | vvp->trigger = NULL; | |
236 | vvp->snapshot_buffer = NULL; | |
237 | vvp->half_drawn = FALSE; | |
238 | ||
be5554c5 RN |
239 | // Initiate center history |
240 | update_centers ( vvp ); | |
241 | ||
50a14534 | 242 | g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL); |
165d30aa | 243 | |
2fd7c35e RN |
244 | #if GTK_CHECK_VERSION (2,18,0) |
245 | gtk_widget_set_can_focus ( GTK_WIDGET(vvp), TRUE ); | |
246 | #else | |
165d30aa | 247 | GTK_WIDGET_SET_FLAGS(vvp, GTK_CAN_FOCUS); /* allow VVP to have focus -- enabling key events, etc */ |
2fd7c35e | 248 | #endif |
50a14534 EB |
249 | } |
250 | ||
251 | GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp ) | |
252 | { | |
253 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
254 | *rv = vvp->background_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_background_color ( VikViewport *vvp ) | |
260 | { | |
261 | static gchar color[8]; | |
262 | 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)); | |
263 | return color; | |
264 | } | |
265 | ||
266 | void vik_viewport_set_background_color ( VikViewport *vvp, const gchar *colorname ) | |
267 | { | |
52aa15a7 | 268 | g_assert ( vvp && vvp->background_gc ); |
b244bc6a GB |
269 | if ( gdk_color_parse ( colorname, &(vvp->background_color) ) ) |
270 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, &(vvp->background_color) ); | |
271 | else | |
272 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
273 | } |
274 | ||
275 | void vik_viewport_set_background_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
276 | { | |
52aa15a7 | 277 | g_assert ( vvp && vvp->background_gc ); |
50a14534 EB |
278 | vvp->background_color = *color; |
279 | gdk_gc_set_rgb_fg_color ( vvp->background_gc, color ); | |
280 | } | |
281 | ||
480fb7e1 RN |
282 | GdkColor *vik_viewport_get_highlight_gdkcolor ( VikViewport *vvp ) |
283 | { | |
284 | GdkColor *rv = g_malloc ( sizeof ( GdkColor ) ); | |
285 | *rv = vvp->highlight_color; | |
286 | return rv; | |
287 | } | |
288 | ||
289 | /* returns pointer to internal static storage, changes next time function called, use quickly */ | |
290 | const gchar *vik_viewport_get_highlight_color ( VikViewport *vvp ) | |
291 | { | |
292 | static gchar color[8]; | |
293 | 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)); | |
294 | return color; | |
295 | } | |
296 | ||
297 | void vik_viewport_set_highlight_color ( VikViewport *vvp, const gchar *colorname ) | |
298 | { | |
299 | g_assert ( vvp->highlight_gc ); | |
300 | gdk_color_parse ( colorname, &(vvp->highlight_color) ); | |
301 | gdk_gc_set_rgb_fg_color ( vvp->highlight_gc, &(vvp->highlight_color) ); | |
302 | } | |
303 | ||
304 | void vik_viewport_set_highlight_gdkcolor ( VikViewport *vvp, GdkColor *color ) | |
305 | { | |
306 | g_assert ( vvp->highlight_gc ); | |
307 | vvp->highlight_color = *color; | |
308 | gdk_gc_set_rgb_fg_color ( vvp->highlight_gc, color ); | |
309 | } | |
310 | ||
311 | GdkGC *vik_viewport_get_gc_highlight ( VikViewport *vvp ) | |
312 | { | |
313 | return vvp->highlight_gc; | |
314 | } | |
50a14534 | 315 | |
04f36d92 RN |
316 | void vik_viewport_set_highlight_thickness ( VikViewport *vvp, gint thickness ) |
317 | { | |
318 | // Otherwise same GDK_* attributes as in vik_viewport_new_gc | |
319 | gdk_gc_set_line_attributes ( vvp->highlight_gc, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
320 | } | |
321 | ||
50a14534 EB |
322 | GdkGC *vik_viewport_new_gc ( VikViewport *vvp, const gchar *colorname, gint thickness ) |
323 | { | |
b244bc6a | 324 | GdkGC *rv = NULL; |
50a14534 EB |
325 | GdkColor color; |
326 | ||
9b082b39 | 327 | rv = gdk_gc_new ( gtk_widget_get_window(GTK_WIDGET(vvp)) ); |
b244bc6a GB |
328 | if ( gdk_color_parse ( colorname, &color ) ) |
329 | gdk_gc_set_rgb_fg_color ( rv, &color ); | |
330 | else | |
331 | g_warning("%s: Failed to parse color '%s'", __FUNCTION__, colorname); | |
50a14534 EB |
332 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); |
333 | return rv; | |
334 | } | |
335 | ||
336 | GdkGC *vik_viewport_new_gc_from_color ( VikViewport *vvp, GdkColor *color, gint thickness ) | |
337 | { | |
338 | GdkGC *rv; | |
339 | ||
9b082b39 | 340 | rv = gdk_gc_new ( gtk_widget_get_window(GTK_WIDGET(vvp)) ); |
50a14534 EB |
341 | gdk_gc_set_rgb_fg_color ( rv, color ); |
342 | gdk_gc_set_line_attributes ( rv, thickness, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND ); | |
343 | return rv; | |
344 | } | |
345 | ||
346 | void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint height ) | |
347 | { | |
348 | vvp->width = width; | |
349 | vvp->height = height; | |
a3603298 RN |
350 | |
351 | vvp->width_2 = vvp->width/2; | |
352 | vvp->height_2 = vvp->height/2; | |
353 | ||
50a14534 EB |
354 | if ( vvp->scr_buffer ) |
355 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
9b082b39 | 356 | vvp->scr_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
0df66d57 EB |
357 | |
358 | /* TODO trigger: only if this is enabled !!! */ | |
359 | if ( vvp->snapshot_buffer ) | |
360 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
9b082b39 | 361 | vvp->snapshot_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
50a14534 EB |
362 | } |
363 | ||
364 | ||
365 | GdkPixmap *vik_viewport_get_pixmap ( VikViewport *vvp ) | |
366 | { | |
367 | return vvp->scr_buffer; | |
368 | } | |
369 | ||
370 | gboolean vik_viewport_configure ( VikViewport *vvp ) | |
371 | { | |
372 | g_return_val_if_fail ( vvp != NULL, TRUE ); | |
373 | ||
90ba111c RN |
374 | GtkAllocation allocation; |
375 | gtk_widget_get_allocation ( GTK_WIDGET(vvp), &allocation ); | |
376 | vvp->width = allocation.width; | |
377 | vvp->height = allocation.height; | |
50a14534 | 378 | |
a3603298 RN |
379 | vvp->width_2 = vvp->width/2; |
380 | vvp->height_2 = vvp->height/2; | |
381 | ||
50a14534 EB |
382 | if ( vvp->scr_buffer ) |
383 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
384 | ||
9b082b39 | 385 | vvp->scr_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
50a14534 | 386 | |
0df66d57 EB |
387 | /* TODO trigger: only if enabled! */ |
388 | if ( vvp->snapshot_buffer ) | |
389 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
390 | ||
9b082b39 | 391 | vvp->snapshot_buffer = gdk_pixmap_new ( gtk_widget_get_window(GTK_WIDGET(vvp)), vvp->width, vvp->height, -1 ); |
0df66d57 EB |
392 | /* TODO trigger */ |
393 | ||
50a14534 | 394 | /* this is down here so it can get a GC (necessary?) */ |
e8e82387 | 395 | if ( !vvp->background_gc ) |
50a14534 | 396 | { |
348e8666 | 397 | vvp->background_gc = vik_viewport_new_gc ( vvp, DEFAULT_BACKGROUND_COLOR, 1 ); |
e8e82387 | 398 | vik_viewport_set_background_color ( vvp, DEFAULT_BACKGROUND_COLOR ); |
50a14534 | 399 | } |
480fb7e1 RN |
400 | if ( ! vvp->highlight_gc ) |
401 | { | |
402 | vvp->highlight_gc = vik_viewport_new_gc ( vvp, DEFAULT_HIGHLIGHT_COLOR, 1 ); | |
403 | vik_viewport_set_highlight_color ( vvp, DEFAULT_HIGHLIGHT_COLOR ); | |
404 | } | |
4e485bf3 QT |
405 | if ( !vvp->scale_bg_gc) { |
406 | vvp->scale_bg_gc = vik_viewport_new_gc(vvp, "grey", 3); | |
407 | } | |
50a14534 EB |
408 | |
409 | return FALSE; | |
410 | } | |
411 | ||
412 | static void viewport_finalize ( GObject *gob ) | |
413 | { | |
414 | VikViewport *vvp = VIK_VIEWPORT(gob); | |
415 | ||
416 | g_return_if_fail ( vvp != NULL ); | |
417 | ||
7143d1e4 RN |
418 | if ( a_vik_get_startup_method ( ) == VIK_STARTUP_METHOD_LAST_LOCATION ) { |
419 | struct LatLon ll; | |
420 | vik_coord_to_latlon ( &(vvp->center), &ll ); | |
421 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_LATITUDE, ll.lat ); | |
422 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_LONGITUDE, ll.lon ); | |
423 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_X, vvp->xmpp ); | |
424 | a_settings_set_double ( VIK_SETTINGS_VIEW_LAST_ZOOM_Y, vvp->ympp ); | |
425 | } | |
426 | ||
be5554c5 RN |
427 | if ( vvp->centers ) |
428 | free_centers ( vvp, 0 ); | |
429 | ||
50a14534 EB |
430 | if ( vvp->scr_buffer ) |
431 | g_object_unref ( G_OBJECT ( vvp->scr_buffer ) ); | |
432 | ||
0df66d57 EB |
433 | if ( vvp->snapshot_buffer ) |
434 | g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) ); | |
435 | ||
50a14534 EB |
436 | if ( vvp->alpha_pixbuf ) |
437 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
438 | ||
439 | if ( vvp->background_gc ) | |
440 | g_object_unref ( G_OBJECT ( vvp->background_gc ) ); | |
441 | ||
480fb7e1 RN |
442 | if ( vvp->highlight_gc ) |
443 | g_object_unref ( G_OBJECT ( vvp->highlight_gc ) ); | |
444 | ||
4e485bf3 QT |
445 | if ( vvp->scale_bg_gc ) { |
446 | g_object_unref ( G_OBJECT ( vvp->scale_bg_gc ) ); | |
447 | vvp->scale_bg_gc = NULL; | |
448 | } | |
449 | ||
50a14534 EB |
450 | G_OBJECT_CLASS(parent_class)->finalize(gob); |
451 | } | |
452 | ||
33e0e500 GB |
453 | /** |
454 | * vik_viewport_clear: | |
455 | * @vvp: self object | |
456 | * | |
457 | * Clear the whole viewport. | |
458 | */ | |
50a14534 EB |
459 | void vik_viewport_clear ( VikViewport *vvp ) |
460 | { | |
461 | g_return_if_fail ( vvp != NULL ); | |
462 | gdk_draw_rectangle(GDK_DRAWABLE(vvp->scr_buffer), vvp->background_gc, TRUE, 0, 0, vvp->width, vvp->height); | |
82aa018d | 463 | vik_viewport_reset_copyrights ( vvp ); |
26336cf0 | 464 | vik_viewport_reset_logos ( vvp ); |
50a14534 EB |
465 | } |
466 | ||
33e0e500 GB |
467 | /** |
468 | * vik_viewport_set_draw_scale: | |
469 | * @vvp: self | |
470 | * @draw_scale: new value | |
471 | * | |
472 | * Enable/Disable display of scale. | |
473 | */ | |
35c7c0ba EB |
474 | void vik_viewport_set_draw_scale ( VikViewport *vvp, gboolean draw_scale ) |
475 | { | |
476 | vvp->draw_scale = draw_scale; | |
477 | } | |
478 | ||
479 | gboolean vik_viewport_get_draw_scale ( VikViewport *vvp ) | |
480 | { | |
481 | return vvp->draw_scale; | |
482 | } | |
483 | ||
acaf7113 AF |
484 | void vik_viewport_draw_scale ( VikViewport *vvp ) |
485 | { | |
c53eda9a GB |
486 | g_return_if_fail ( vvp != NULL ); |
487 | ||
35c7c0ba EB |
488 | if ( vvp->draw_scale ) { |
489 | VikCoord left, right; | |
490 | gdouble unit, base, diff, old_unit, old_diff, ratio; | |
26336cf0 | 491 | gint odd, len, SCSIZE = 5, HEIGHT=10; |
35c7c0ba EB |
492 | PangoLayout *pl; |
493 | gchar s[128]; | |
acaf7113 | 494 | |
35c7c0ba EB |
495 | vik_viewport_screen_to_coord ( vvp, 0, vvp->height, &left ); |
496 | vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height, &right ); | |
acaf7113 | 497 | |
6f9336aa RN |
498 | vik_units_distance_t dist_units = a_vik_get_units_distance (); |
499 | switch (dist_units) { | |
500 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
501 | base = vik_coord_diff ( &left, &right ); // in meters | |
502 | break; | |
503 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a | 504 | // in 0.1 miles (copes better when zoomed in as 1 mile can be too big) |
433b3f7f | 505 | base = VIK_METERS_TO_MILES(vik_coord_diff ( &left, &right )) * 10.0; |
6f9336aa | 506 | break; |
b22233bd RN |
507 | case VIK_UNITS_DISTANCE_NAUTICAL_MILES: |
508 | // in 0.1 NM (copes better when zoomed in as 1 NM can be too big) | |
509 | base = VIK_METERS_TO_NAUTICAL_MILES(vik_coord_diff ( &left, &right )) * 10.0; | |
510 | break; | |
6f9336aa RN |
511 | default: |
512 | base = 1; // Keep the compiler happy | |
513 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
514 | } | |
35c7c0ba | 515 | ratio = (vvp->width/SCSIZE)/base; |
acaf7113 | 516 | |
35c7c0ba EB |
517 | unit = 1; |
518 | diff = fabs(base-unit); | |
acaf7113 AF |
519 | old_unit = unit; |
520 | old_diff = diff; | |
35c7c0ba EB |
521 | odd = 1; |
522 | while (diff <= old_diff) { | |
523 | old_unit = unit; | |
524 | old_diff = diff; | |
525 | unit = unit * (odd%2 ? 5 : 2); | |
526 | diff = fabs(base-unit); | |
527 | odd++; | |
528 | } | |
529 | unit = old_unit; | |
530 | len = unit * ratio; | |
acaf7113 | 531 | |
4e485bf3 QT |
532 | /* white background */ |
533 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
534 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); | |
535 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
536 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); | |
537 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, | |
538 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); | |
539 | /* black scale */ | |
ff37db21 | 540 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 541 | PAD, vvp->height-PAD, PAD + len, vvp->height-PAD); |
ff37db21 | 542 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 543 | PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT); |
ff37db21 | 544 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 545 | PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT); |
35c7c0ba EB |
546 | if (odd%2) { |
547 | int i; | |
548 | for (i=1; i<5; i++) { | |
4e485bf3 QT |
549 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
550 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
ff37db21 | 551 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 552 | PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
35c7c0ba EB |
553 | } |
554 | } else { | |
555 | int i; | |
556 | for (i=1; i<10; i++) { | |
4e485bf3 QT |
557 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, |
558 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); | |
ff37db21 | 559 | vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
35c7c0ba EB |
560 | PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2))); |
561 | } | |
acaf7113 | 562 | } |
35c7c0ba | 563 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); |
ff37db21 | 564 | pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc); |
35c7c0ba | 565 | |
6f9336aa RN |
566 | switch (dist_units) { |
567 | case VIK_UNITS_DISTANCE_KILOMETRES: | |
568 | if (unit >= 1000) { | |
b22233bd | 569 | sprintf(s, "%d km", (int)unit/1000); |
6f9336aa | 570 | } else { |
b22233bd | 571 | sprintf(s, "%d m", (int)unit); |
6f9336aa RN |
572 | } |
573 | break; | |
574 | case VIK_UNITS_DISTANCE_MILES: | |
8d772d8a RN |
575 | // Handle units in 0.1 miles |
576 | if (unit < 10.0) { | |
b22233bd RN |
577 | sprintf(s, "%0.1f miles", unit/10.0); |
578 | } | |
579 | else if ((int)unit == 10.0) { | |
580 | sprintf(s, "1 mile"); | |
581 | } | |
582 | else { | |
583 | sprintf(s, "%d miles", (int)(unit/10.0)); | |
584 | } | |
585 | break; | |
586 | case VIK_UNITS_DISTANCE_NAUTICAL_MILES: | |
587 | // Handle units in 0.1 NM | |
588 | if (unit < 10.0) { | |
589 | sprintf(s, "%0.1f NM", unit/10.0); | |
8d772d8a RN |
590 | } |
591 | else if ((int)unit == 10.0) { | |
b22233bd | 592 | sprintf(s, "1 NM"); |
6f9336aa RN |
593 | } |
594 | else { | |
b22233bd | 595 | sprintf(s, "%d NMs", (int)(unit/10.0)); |
6f9336aa RN |
596 | } |
597 | break; | |
598 | default: | |
599 | g_critical("Houston, we've had a problem. distance=%d", dist_units); | |
acaf7113 | 600 | } |
35c7c0ba | 601 | pango_layout_set_text(pl, s, -1); |
ff37db21 | 602 | vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
acaf7113 | 603 | PAD + len + PAD, vvp->height - PAD - 10, pl); |
6278ccc6 | 604 | g_object_unref(pl); |
e6869c62 | 605 | pl = NULL; |
35c7c0ba | 606 | } |
acaf7113 AF |
607 | } |
608 | ||
82aa018d GB |
609 | void vik_viewport_draw_copyright ( VikViewport *vvp ) |
610 | { | |
611 | g_return_if_fail ( vvp != NULL ); | |
612 | ||
82aa018d GB |
613 | PangoLayout *pl; |
614 | PangoRectangle ink_rect, logical_rect; | |
615 | gchar s[128] = ""; | |
616 | ||
617 | /* compute copyrights string */ | |
618 | guint len = g_slist_length ( vvp->copyrights ); | |
15a0bd14 | 619 | |
82aa018d GB |
620 | int i; |
621 | for (i = 0 ; i < len ; i++) | |
622 | { | |
15a0bd14 RN |
623 | // Stop when buffer is full |
624 | int slen = strlen ( s ); | |
625 | if ( slen >= 127 ) | |
626 | break; | |
627 | ||
82aa018d | 628 | gchar *copyright = g_slist_nth_data ( vvp->copyrights, i ); |
15a0bd14 RN |
629 | |
630 | // Only use part of this copyright that fits in the available space left | |
631 | // remembering 1 character is left available for the appended space | |
632 | int clen = strlen ( copyright ); | |
633 | if ( slen + clen > 126 ) { | |
634 | clen = 126 - slen; | |
635 | } | |
636 | ||
637 | strncat ( s, copyright, clen ); | |
82aa018d GB |
638 | strcat ( s, " " ); |
639 | } | |
640 | ||
641 | /* create pango layout */ | |
642 | pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); | |
ff37db21 | 643 | pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc); |
82aa018d GB |
644 | pango_layout_set_alignment ( pl, PANGO_ALIGN_RIGHT ); |
645 | ||
646 | /* Set the text */ | |
647 | pango_layout_set_text(pl, s, -1); | |
648 | ||
649 | /* Use maximum of half the viewport width */ | |
56cb1807 | 650 | pango_layout_set_width ( pl, ( vvp->width / 2 ) * PANGO_SCALE ); |
82aa018d | 651 | pango_layout_get_pixel_extents(pl, &ink_rect, &logical_rect); |
ff37db21 | 652 | vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc, |
56cb1807 | 653 | vvp->width / 2, vvp->height - logical_rect.height, pl); |
82aa018d GB |
654 | |
655 | /* Free memory */ | |
656 | g_object_unref(pl); | |
657 | pl = NULL; | |
658 | } | |
659 | ||
33e0e500 GB |
660 | /** |
661 | * vik_viewport_set_draw_centermark: | |
662 | * @vvp: self object | |
663 | * @draw_centermark: new value | |
664 | * | |
665 | * Enable/Disable display of center mark. | |
666 | */ | |
c933487f QT |
667 | void vik_viewport_set_draw_centermark ( VikViewport *vvp, gboolean draw_centermark ) |
668 | { | |
669 | vvp->draw_centermark = draw_centermark; | |
670 | } | |
671 | ||
672 | gboolean vik_viewport_get_draw_centermark ( VikViewport *vvp ) | |
673 | { | |
674 | return vvp->draw_centermark; | |
675 | } | |
676 | ||
677 | void vik_viewport_draw_centermark ( VikViewport *vvp ) | |
678 | { | |
c53eda9a GB |
679 | g_return_if_fail ( vvp != NULL ); |
680 | ||
c933487f QT |
681 | if ( !vvp->draw_centermark ) |
682 | return; | |
683 | ||
3df69a6b QT |
684 | const int len = 30; |
685 | const int gap = 4; | |
c933487f QT |
686 | int center_x = vvp->width/2; |
687 | int center_y = vvp->height/2; | |
ff37db21 | 688 | GdkGC * black_gc = gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc; |
c933487f QT |
689 | |
690 | /* white back ground */ | |
3df69a6b QT |
691 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x - len, center_y, center_x - gap, center_y); |
692 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x + gap, center_y, center_x + len, center_y); | |
693 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y - len, center_x, center_y - gap); | |
694 | vik_viewport_draw_line(vvp, vvp->scale_bg_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f | 695 | /* black fore ground */ |
3df69a6b QT |
696 | vik_viewport_draw_line(vvp, black_gc, center_x - len, center_y, center_x - gap, center_y); |
697 | vik_viewport_draw_line(vvp, black_gc, center_x + gap, center_y, center_x + len, center_y); | |
698 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y - len, center_x, center_y - gap); | |
699 | vik_viewport_draw_line(vvp, black_gc, center_x, center_y + gap, center_x, center_y + len); | |
c933487f QT |
700 | |
701 | } | |
702 | ||
26336cf0 GB |
703 | void vik_viewport_draw_logo ( VikViewport *vvp ) |
704 | { | |
705 | g_return_if_fail ( vvp != NULL ); | |
706 | ||
26336cf0 GB |
707 | guint len = g_slist_length ( vvp->logos ); |
708 | gint x = vvp->width - PAD; | |
709 | gint y = PAD; | |
710 | int i; | |
711 | for (i = 0 ; i < len ; i++) | |
712 | { | |
713 | GdkPixbuf *logo = g_slist_nth_data ( vvp->logos, i ); | |
714 | gint width = gdk_pixbuf_get_width ( logo ); | |
715 | gint height = gdk_pixbuf_get_height ( logo ); | |
716 | vik_viewport_draw_pixbuf ( vvp, logo, 0, 0, x - width, y, width, height ); | |
717 | x = x - width - PAD; | |
718 | } | |
2afcef36 | 719 | } |
26336cf0 | 720 | |
2afcef36 RN |
721 | void vik_viewport_set_draw_highlight ( VikViewport *vvp, gboolean draw_highlight ) |
722 | { | |
723 | vvp->draw_highlight = draw_highlight; | |
724 | } | |
725 | ||
726 | gboolean vik_viewport_get_draw_highlight ( VikViewport *vvp ) | |
727 | { | |
728 | return vvp->draw_highlight; | |
26336cf0 GB |
729 | } |
730 | ||
50a14534 EB |
731 | void vik_viewport_sync ( VikViewport *vvp ) |
732 | { | |
733 | g_return_if_fail ( vvp != NULL ); | |
9b082b39 | 734 | 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 |
735 | } |
736 | ||
737 | void vik_viewport_pan_sync ( VikViewport *vvp, gint x_off, gint y_off ) | |
738 | { | |
acaf7113 AF |
739 | gint x, y, wid, hei; |
740 | ||
50a14534 | 741 | g_return_if_fail ( vvp != NULL ); |
9b082b39 | 742 | 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 |
743 | |
744 | if (x_off >= 0) { | |
745 | x = 0; | |
746 | wid = x_off; | |
747 | } else { | |
748 | x = vvp->width+x_off; | |
749 | wid = -x_off; | |
750 | } | |
751 | if (y_off >= 0) { | |
752 | y = 0; | |
753 | hei = y_off; | |
754 | } else { | |
755 | y = vvp->height+y_off; | |
756 | hei = -y_off; | |
757 | } | |
758 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), x, 0, wid, vvp->height); | |
759 | gtk_widget_queue_draw_area(GTK_WIDGET(vvp), 0, y, vvp->width, hei); | |
50a14534 EB |
760 | } |
761 | ||
762 | void vik_viewport_set_zoom ( VikViewport *vvp, gdouble xympp ) | |
763 | { | |
764 | g_return_if_fail ( vvp != NULL ); | |
a3603298 | 765 | if ( xympp >= VIK_VIEWPORT_MIN_ZOOM && xympp <= VIK_VIEWPORT_MAX_ZOOM ) { |
50a14534 | 766 | vvp->xmpp = vvp->ympp = xympp; |
a3603298 RN |
767 | // Since xmpp & ympp are the same it doesn't matter which one is used here |
768 | vvp->xmfactor = vvp->ymfactor = MERCATOR_FACTOR(vvp->xmpp); | |
769 | } | |
50a14534 EB |
770 | |
771 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
772 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
773 | } |
774 | ||
775 | /* or could do factor */ | |
776 | void vik_viewport_zoom_in ( VikViewport *vvp ) | |
777 | { | |
778 | g_return_if_fail ( vvp != NULL ); | |
779 | if ( vvp->xmpp >= (VIK_VIEWPORT_MIN_ZOOM*2) && vvp->ympp >= (VIK_VIEWPORT_MIN_ZOOM*2) ) | |
780 | { | |
781 | vvp->xmpp /= 2; | |
782 | vvp->ympp /= 2; | |
783 | ||
a3603298 RN |
784 | vvp->xmfactor = MERCATOR_FACTOR(vvp->xmpp); |
785 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); | |
786 | ||
50a14534 EB |
787 | viewport_utm_zone_check(vvp); |
788 | } | |
789 | } | |
790 | ||
791 | void vik_viewport_zoom_out ( VikViewport *vvp ) | |
792 | { | |
793 | g_return_if_fail ( vvp != NULL ); | |
794 | if ( vvp->xmpp <= (VIK_VIEWPORT_MAX_ZOOM/2) && vvp->ympp <= (VIK_VIEWPORT_MAX_ZOOM/2) ) | |
795 | { | |
796 | vvp->xmpp *= 2; | |
797 | vvp->ympp *= 2; | |
798 | ||
a3603298 RN |
799 | vvp->xmfactor = MERCATOR_FACTOR(vvp->xmpp); |
800 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); | |
801 | ||
50a14534 EB |
802 | viewport_utm_zone_check(vvp); |
803 | } | |
804 | } | |
805 | ||
806 | gdouble vik_viewport_get_zoom ( VikViewport *vvp ) | |
807 | { | |
808 | if ( vvp->xmpp == vvp->ympp ) | |
809 | return vvp->xmpp; | |
810 | return 0.0; | |
811 | } | |
812 | ||
813 | gdouble vik_viewport_get_xmpp ( VikViewport *vvp ) | |
814 | { | |
815 | return vvp->xmpp; | |
816 | } | |
817 | ||
818 | gdouble vik_viewport_get_ympp ( VikViewport *vvp ) | |
819 | { | |
820 | return vvp->ympp; | |
821 | } | |
822 | ||
823 | void vik_viewport_set_xmpp ( VikViewport *vvp, gdouble xmpp ) | |
824 | { | |
825 | if ( xmpp >= VIK_VIEWPORT_MIN_ZOOM && xmpp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
826 | vvp->xmpp = xmpp; | |
a3603298 | 827 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); |
50a14534 EB |
828 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) |
829 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
830 | } |
831 | } | |
832 | ||
833 | void vik_viewport_set_ympp ( VikViewport *vvp, gdouble ympp ) | |
834 | { | |
835 | if ( ympp >= VIK_VIEWPORT_MIN_ZOOM && ympp <= VIK_VIEWPORT_MAX_ZOOM ) { | |
836 | vvp->ympp = ympp; | |
a3603298 | 837 | vvp->ymfactor = MERCATOR_FACTOR(vvp->ympp); |
50a14534 EB |
838 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) |
839 | viewport_utm_zone_check(vvp); | |
50a14534 EB |
840 | } |
841 | } | |
842 | ||
843 | ||
844 | const VikCoord *vik_viewport_get_center ( VikViewport *vvp ) | |
845 | { | |
846 | g_return_val_if_fail ( vvp != NULL, NULL ); | |
847 | return &(vvp->center); | |
848 | } | |
849 | ||
850 | /* called every time we update coordinates/zoom */ | |
851 | static void viewport_utm_zone_check ( VikViewport *vvp ) | |
852 | { | |
853 | if ( vvp->coord_mode == VIK_COORD_UTM ) | |
854 | { | |
855 | struct UTM utm; | |
856 | struct LatLon ll; | |
857 | a_coords_utm_to_latlon ( (struct UTM *) &(vvp->center), &ll ); | |
858 | a_coords_latlon_to_utm ( &ll, &utm ); | |
859 | if ( utm.zone != vvp->center.utm_zone ) | |
860 | *((struct UTM *)(&vvp->center)) = utm; | |
861 | ||
862 | /* misc. stuff so we don't have to check later */ | |
863 | vvp->utm_zone_width = viewport_utm_zone_width ( vvp ); | |
864 | vvp->one_utm_zone = ( vik_viewport_rightmost_zone(vvp) == vik_viewport_leftmost_zone(vvp) ); | |
865 | } | |
866 | } | |
867 | ||
be5554c5 RN |
868 | /** |
869 | * Free an individual center position in the history list | |
870 | */ | |
871 | static void free_center ( VikViewport *vvp, guint index ) | |
872 | { | |
873 | VikCoord *coord = g_list_nth_data ( vvp->centers, index ); | |
874 | if ( coord ) | |
875 | g_free ( coord ); | |
876 | GList *gl = g_list_nth ( vvp->centers, index ); | |
877 | if ( gl ) | |
878 | vvp->centers = g_list_delete_link ( vvp->centers, gl ); | |
879 | } | |
880 | ||
881 | /** | |
882 | * Free a set of center positions in the history list, | |
883 | * from the indicated start index to the end of the list | |
884 | */ | |
885 | static void free_centers ( VikViewport *vvp, guint start ) | |
886 | { | |
887 | // Have to work backward since we delete items referenced by the '_nth()' values, | |
888 | // otherwise if processed forward - removing the lower nth index entries would change the subsequent indexing | |
889 | for ( guint i = g_list_length(vvp->centers)-1; i > start; i-- ) | |
890 | free_center ( vvp, i ); | |
891 | } | |
892 | ||
893 | /** | |
894 | * Store the current center position into the history list | |
895 | * and emit a signal to notify clients the list has been updated | |
896 | */ | |
897 | static void update_centers ( VikViewport *vvp ) | |
898 | { | |
899 | VikCoord *new_center = g_malloc(sizeof (VikCoord)); | |
900 | *new_center = vvp->center; | |
901 | ||
902 | if ( vvp->centers_index ) { | |
903 | ||
904 | if ( vvp->centers_index == vvp->centers_max-1 ) { | |
905 | // List is full, so drop the oldest value to make room for the new one | |
906 | free_center ( vvp, 0 ); | |
907 | vvp->centers_index--; | |
908 | } | |
909 | else { | |
910 | // Reset the now unused section of the list | |
911 | // Free from the index to the end | |
912 | free_centers ( vvp, vvp->centers_index+1 ); | |
913 | } | |
914 | ||
915 | } | |
916 | ||
917 | // Store new position | |
918 | // NB ATM this can be the same location as the last one in the list | |
919 | vvp->centers = g_list_append ( vvp->centers, new_center ); | |
920 | ||
921 | // Reset to the end (NB should be same as centers_index++) | |
922 | vvp->centers_index = g_list_length ( vvp->centers ) - 1; | |
923 | ||
924 | // Inform interested subscribers that this change has occurred | |
925 | g_signal_emit ( G_OBJECT(vvp), viewport_signals[VW_UPDATED_CENTER_SIGNAL], 0 ); | |
926 | } | |
927 | ||
fca1f3ad RN |
928 | /** |
929 | * Show the list of forward/backward positions | |
930 | * ATM only for debug usage | |
931 | */ | |
932 | void vik_viewport_show_centers ( VikViewport *vvp, GtkWindow *parent ) | |
933 | { | |
934 | GList* node = NULL; | |
935 | GList* texts = NULL; | |
936 | gint index = 0; | |
937 | for (node = vvp->centers; node != NULL; node = g_list_next(node)) { | |
938 | gchar *lat = NULL, *lon = NULL; | |
939 | struct LatLon ll; | |
940 | vik_coord_to_latlon (node->data, &ll); | |
941 | a_coords_latlon_to_string ( &ll, &lat, &lon ); | |
942 | gchar *extra = NULL; | |
943 | if ( index == vvp->centers_index-1 ) | |
944 | extra = g_strdup ( " [Back]" ); | |
945 | else if ( index == vvp->centers_index+1 ) | |
946 | extra = g_strdup ( " [Forward]" ); | |
947 | else | |
948 | extra = g_strdup ( "" ); | |
949 | texts = g_list_prepend ( texts , g_strdup_printf ( "%s %s%s", lat, lon, extra ) ); | |
950 | g_free ( lat ); | |
951 | g_free ( lon ); | |
952 | g_free ( extra ); | |
953 | index++; | |
954 | } | |
955 | ||
956 | // NB: No i18n as this is just for debug | |
957 | // Using this function the dialog allows sorting of the list which isn't appropriate here | |
958 | // but this doesn't matter much for debug purposes of showing stuff... | |
959 | GList *ans = a_dialog_select_from_list(parent, | |
960 | texts, | |
961 | FALSE, | |
962 | "Back/Forward Locations", | |
963 | "Back/Forward Locations"); | |
964 | for (node = ans; node != NULL; node = g_list_next(node)) | |
965 | g_free(node->data); | |
966 | g_list_free(ans); | |
967 | for (node = texts; node != NULL; node = g_list_next(node)) | |
968 | g_free(node->data); | |
969 | g_list_free(texts); | |
970 | } | |
971 | ||
be5554c5 RN |
972 | /** |
973 | * vik_viewport_go_back: | |
974 | * | |
975 | * Move back in the position history | |
976 | * | |
977 | * Returns: %TRUE one success | |
978 | */ | |
979 | gboolean vik_viewport_go_back ( VikViewport *vvp ) | |
980 | { | |
981 | // see if the current position is different from the last saved center position within a certain radius | |
982 | VikCoord *center = g_list_nth_data ( vvp->centers, vvp->centers_index ); | |
983 | if ( center ) { | |
984 | // Consider an exclusion size (should it zoom level dependent, rather than a fixed value?) | |
985 | // When still near to the last saved position we'll jump over it to the one before | |
986 | if ( vik_coord_diff ( center, &vvp->center ) > vvp->centers_radius ) { | |
987 | ||
988 | if ( vvp->centers_index == g_list_length(vvp->centers)-1 ) { | |
989 | // Only when we haven't already moved back in the list | |
990 | // Remember where this request came from | |
991 | // (alternatively we could insert in the list on every back attempt) | |
992 | update_centers ( vvp ); | |
993 | } | |
994 | ||
995 | } | |
996 | // 'Go back' if possible | |
997 | // NB if we inserted a position above, then this will then move to the last saved position | |
998 | // otherwise this will skip to the previous saved position, as it's probably somewhere else. | |
999 | if ( vvp->centers_index > 0 ) | |
1000 | vvp->centers_index--; | |
1001 | } | |
1002 | else { | |
1003 | return FALSE; | |
1004 | } | |
1005 | ||
1006 | VikCoord *new_center = g_list_nth_data ( vvp->centers, vvp->centers_index ); | |
1007 | if ( new_center ) { | |
1008 | vik_viewport_set_center_coord ( vvp, new_center, FALSE ); | |
1009 | return TRUE; | |
1010 | } | |
1011 | return FALSE; | |
1012 | } | |
1013 | ||
1014 | /** | |
1015 | * vik_viewport_go_forward: | |
1016 | * | |
1017 | * Move forward in the position history | |
1018 | * | |
1019 | * Returns: %TRUE one success | |
1020 | */ | |
1021 | gboolean vik_viewport_go_forward ( VikViewport *vvp ) | |
1022 | { | |
1023 | if ( vvp->centers_index == vvp->centers_max-1 ) | |
1024 | return FALSE; | |
1025 | ||
1026 | vvp->centers_index++; | |
1027 | VikCoord *new_center = g_list_nth_data ( vvp->centers, vvp->centers_index ); | |
1028 | if ( new_center ) { | |
1029 | vik_viewport_set_center_coord ( vvp, new_center, FALSE ); | |
1030 | return TRUE; | |
1031 | } | |
1032 | else | |
1033 | // Set to end of list | |
1034 | vvp->centers_index = g_list_length(vvp->centers) - 1; | |
1035 | ||
1036 | return FALSE; | |
1037 | } | |
1038 | ||
1039 | /** | |
1040 | * vik_viewport_back_available: | |
1041 | * | |
1042 | * Returns: %TRUE when a previous position in the history is available | |
1043 | */ | |
1044 | gboolean vik_viewport_back_available ( const VikViewport *vvp ) | |
1045 | { | |
1046 | return ( vvp->centers_index > 0 ); | |
1047 | } | |
1048 | ||
1049 | /** | |
1050 | * vik_viewport_forward_available: | |
1051 | * | |
1052 | * Returns: %TRUE when a next position in the history is available | |
1053 | */ | |
1054 | gboolean vik_viewport_forward_available ( const VikViewport *vvp ) | |
1055 | { | |
1056 | return ( vvp->centers_index < g_list_length(vvp->centers)-1 ); | |
1057 | } | |
1058 | ||
1059 | /** | |
1060 | * vik_viewport_set_center_latlon: | |
1061 | * @vvp: The viewport to reposition. | |
1062 | * @ll: The new center position in Lat/Lon format | |
1063 | * @save_position: Whether this new position should be saved into the history of positions | |
1064 | * Normally only specific user requests should be saved (i.e. to not include Pan and Zoom repositions) | |
1065 | */ | |
1066 | void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll, gboolean save_position ) | |
50a14534 EB |
1067 | { |
1068 | vik_coord_load_from_latlon ( &(vvp->center), vvp->coord_mode, ll ); | |
be5554c5 RN |
1069 | if ( save_position ) |
1070 | update_centers ( vvp ); | |
50a14534 EB |
1071 | if ( vvp->coord_mode == VIK_COORD_UTM ) |
1072 | viewport_utm_zone_check ( vvp ); | |
1073 | } | |
1074 | ||
be5554c5 RN |
1075 | /** |
1076 | * vik_viewport_set_center_utm: | |
1077 | * @vvp: The viewport to reposition. | |
1078 | * @utm: The new center position in UTM format | |
1079 | * @save_position: Whether this new position should be saved into the history of positions | |
1080 | * Normally only specific user requests should be saved (i.e. to not include Pan and Zoom repositions) | |
1081 | */ | |
1082 | void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm, gboolean save_position ) | |
50a14534 EB |
1083 | { |
1084 | vik_coord_load_from_utm ( &(vvp->center), vvp->coord_mode, utm ); | |
be5554c5 RN |
1085 | if ( save_position ) |
1086 | update_centers ( vvp ); | |
50a14534 EB |
1087 | if ( vvp->coord_mode == VIK_COORD_UTM ) |
1088 | viewport_utm_zone_check ( vvp ); | |
1089 | } | |
1090 | ||
be5554c5 RN |
1091 | /** |
1092 | * vik_viewport_set_center_coord: | |
1093 | * @vvp: The viewport to reposition. | |
1094 | * @coord: The new center position in a VikCoord type | |
1095 | * @save_position: Whether this new position should be saved into the history of positions | |
1096 | * Normally only specific user requests should be saved (i.e. to not include Pan and Zoom repositions) | |
1097 | */ | |
1098 | void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord, gboolean save_position ) | |
50a14534 EB |
1099 | { |
1100 | vvp->center = *coord; | |
be5554c5 RN |
1101 | if ( save_position ) |
1102 | update_centers ( vvp ); | |
50a14534 EB |
1103 | if ( vvp->coord_mode == VIK_COORD_UTM ) |
1104 | viewport_utm_zone_check ( vvp ); | |
1105 | } | |
1106 | ||
1107 | void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br ) | |
1108 | { | |
1109 | g_return_if_fail ( vvp->coord_mode == VIK_COORD_UTM ); | |
1110 | ||
1111 | /* get center, then just offset */ | |
1112 | vik_viewport_center_for_zonen ( vvp, VIK_UTM(ul), zone ); | |
1113 | ul->mode = VIK_COORD_UTM; | |
1114 | *br = *ul; | |
1115 | ||
1116 | ul->north_south += (vvp->ympp * vvp->height / 2); | |
1117 | ul->east_west -= (vvp->xmpp * vvp->width / 2); | |
1118 | br->north_south -= (vvp->ympp * vvp->height / 2); | |
1119 | br->east_west += (vvp->xmpp * vvp->width / 2); | |
1120 | } | |
1121 | ||
1122 | void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone) | |
1123 | { | |
1124 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1125 | *center = *((struct UTM *)(vik_viewport_get_center ( vvp ))); | |
1126 | center->easting -= ( zone - center->zone ) * vvp->utm_zone_width; | |
1127 | center->zone = zone; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | gchar vik_viewport_leftmost_zone ( VikViewport *vvp ) | |
1132 | { | |
1133 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1134 | VikCoord coord; | |
1135 | g_assert ( vvp != NULL ); | |
1136 | vik_viewport_screen_to_coord ( vvp, 0, 0, &coord ); | |
1137 | return coord.utm_zone; | |
1138 | } | |
1139 | return '\0'; | |
1140 | } | |
1141 | ||
1142 | gchar vik_viewport_rightmost_zone ( VikViewport *vvp ) | |
1143 | { | |
1144 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1145 | VikCoord coord; | |
1146 | g_assert ( vvp != NULL ); | |
1147 | vik_viewport_screen_to_coord ( vvp, vvp->width, 0, &coord ); | |
1148 | return coord.utm_zone; | |
1149 | } | |
1150 | return '\0'; | |
1151 | } | |
1152 | ||
1153 | ||
1154 | void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y ) | |
1155 | { | |
1156 | g_return_if_fail ( vvp != NULL ); | |
1157 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1158 | /* slightly optimized */ | |
1159 | vvp->center.east_west += vvp->xmpp * (x - (vvp->width/2)); | |
1160 | vvp->center.north_south += vvp->ympp * ((vvp->height/2) - y); | |
1161 | viewport_utm_zone_check ( vvp ); | |
1162 | } else { | |
1163 | VikCoord tmp; | |
1164 | vik_viewport_screen_to_coord ( vvp, x, y, &tmp ); | |
be5554c5 | 1165 | vik_viewport_set_center_coord ( vvp, &tmp, FALSE ); |
50a14534 EB |
1166 | } |
1167 | } | |
1168 | ||
1169 | gint vik_viewport_get_width( VikViewport *vvp ) | |
1170 | { | |
1171 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
1172 | return vvp->width; | |
1173 | } | |
1174 | ||
1175 | gint vik_viewport_get_height( VikViewport *vvp ) | |
1176 | { | |
1177 | g_return_val_if_fail ( vvp != NULL, 0 ); | |
1178 | return vvp->height; | |
1179 | } | |
1180 | ||
1181 | void vik_viewport_screen_to_coord ( VikViewport *vvp, int x, int y, VikCoord *coord ) | |
1182 | { | |
c53eda9a GB |
1183 | g_return_if_fail ( vvp != NULL ); |
1184 | ||
50a14534 EB |
1185 | if ( vvp->coord_mode == VIK_COORD_UTM ) { |
1186 | int zone_delta; | |
1187 | struct UTM *utm = (struct UTM *) coord; | |
1188 | coord->mode = VIK_COORD_UTM; | |
1189 | ||
50a14534 EB |
1190 | utm->zone = vvp->center.utm_zone; |
1191 | utm->letter = vvp->center.utm_letter; | |
a3603298 | 1192 | utm->easting = ( ( x - ( vvp->width_2) ) * vvp->xmpp ) + vvp->center.east_west; |
50a14534 EB |
1193 | zone_delta = floor( (utm->easting - EASTING_OFFSET ) / vvp->utm_zone_width + 0.5 ); |
1194 | utm->zone += zone_delta; | |
1195 | utm->easting -= zone_delta * vvp->utm_zone_width; | |
a3603298 | 1196 | utm->northing = ( ( ( vvp->height_2) - y ) * vvp->ympp ) + vvp->center.north_south; |
50a14534 EB |
1197 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { |
1198 | coord->mode = VIK_COORD_LATLON; | |
d587678a | 1199 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
a3603298 RN |
1200 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width_2)); |
1201 | coord->north_south = vvp->center.north_south + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height_2 - y)); | |
d587678a | 1202 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) |
a3603298 | 1203 | 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 | 1204 | else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
a3603298 RN |
1205 | /* This isn't called with a high frequently so less need to optimize */ |
1206 | coord->east_west = vvp->center.east_west + (180.0 * vvp->xmpp / 65536 / 256 * (x - vvp->width_2)); | |
1207 | coord->north_south = DEMERCLAT ( MERCLAT(vvp->center.north_south) + (180.0 * vvp->ympp / 65536 / 256 * (vvp->height_2 - y)) ); | |
50a14534 EB |
1208 | } |
1209 | } | |
1210 | } | |
1211 | ||
a3603298 RN |
1212 | /* |
1213 | * Since this function is used for every drawn trackpoint - it can get called alot | |
1214 | * Thus x & y position factors are calculated once on zoom changes, | |
1215 | * avoiding the need to do it here all the time. | |
1216 | * For good measure the half width and height values are also pre calculated too. | |
1217 | */ | |
50a14534 EB |
1218 | void vik_viewport_coord_to_screen ( VikViewport *vvp, const VikCoord *coord, int *x, int *y ) |
1219 | { | |
1220 | static VikCoord tmp; | |
1221 | g_return_if_fail ( vvp != NULL ); | |
1222 | ||
1223 | if ( coord->mode != vvp->coord_mode ) | |
1224 | { | |
1225 | g_warning ( "Have to convert in vik_viewport_coord_to_screen! This should never happen!"); | |
1226 | vik_coord_copy_convert ( coord, vvp->coord_mode, &tmp ); | |
1227 | coord = &tmp; | |
1228 | } | |
1229 | ||
1230 | if ( vvp->coord_mode == VIK_COORD_UTM ) { | |
1231 | struct UTM *center = (struct UTM *) &(vvp->center); | |
1232 | struct UTM *utm = (struct UTM *) coord; | |
1233 | if ( center->zone != utm->zone && vvp->one_utm_zone ) | |
1234 | { | |
1235 | *x = *y = VIK_VIEWPORT_UTM_WRONG_ZONE; | |
1236 | return; | |
1237 | } | |
1238 | ||
a3603298 | 1239 | *x = ( (utm->easting - center->easting) / vvp->xmpp ) + (vvp->width_2) - |
50a14534 | 1240 | (center->zone - utm->zone ) * vvp->utm_zone_width / vvp->xmpp; |
a3603298 | 1241 | *y = (vvp->height_2) - ( (utm->northing - center->northing) / vvp->ympp ); |
50a14534 EB |
1242 | } else if ( vvp->coord_mode == VIK_COORD_LATLON ) { |
1243 | struct LatLon *center = (struct LatLon *) &(vvp->center); | |
1244 | struct LatLon *ll = (struct LatLon *) coord; | |
1245 | double xx,yy; | |
d587678a | 1246 | if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_LATLON ) { |
a3603298 RN |
1247 | *x = vvp->width_2 + ( MERCATOR_FACTOR(vvp->xmpp) * (ll->lon - center->lon) ); |
1248 | *y = vvp->height_2 + ( MERCATOR_FACTOR(vvp->ympp) * (center->lat - ll->lat) ); | |
d587678a | 1249 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_EXPEDIA ) { |
a3603298 | 1250 | 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 | 1251 | *x = xx; *y = yy; |
50a14534 | 1252 | } else if ( vvp->drawmode == VIK_VIEWPORT_DRAWMODE_MERCATOR ) { |
a3603298 RN |
1253 | *x = vvp->width_2 + ( MERCATOR_FACTOR(vvp->xmpp) * (ll->lon - center->lon) ); |
1254 | *y = vvp->height_2 + ( MERCATOR_FACTOR(vvp->ympp) * ( MERCLAT(center->lat) - MERCLAT(ll->lat) ) ); | |
50a14534 EB |
1255 | } |
1256 | } | |
1257 | } | |
1258 | ||
5d325845 RN |
1259 | // Clip functions continually reduce the value by a factor until it is in the acceptable range |
1260 | // whilst also scaling the other coordinate value. | |
1261 | static void clip_x ( gint *x1, gint *y1, gint *x2, gint *y2 ) | |
d9ffd267 | 1262 | { |
5d325845 RN |
1263 | while ( ABS(*x1) > 32768 ) { |
1264 | *x1 = *x2 + (0.5 * (*x1-*x2)); | |
1265 | *y1 = *y2 + (0.5 * (*y1-*y2)); | |
d9ffd267 EB |
1266 | } |
1267 | } | |
1268 | ||
5d325845 RN |
1269 | static void clip_y ( gint *x1, gint *y1, gint *x2, gint *y2 ) |
1270 | { | |
1271 | while ( ABS(*y1) > 32767 ) { | |
1272 | *x1 = *x2 + (0.5 * (*x1-*x2)); | |
1273 | *y1 = *y2 + (0.5 * (*y1-*y2)); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | /** | |
1278 | * a_viewport_clip_line: | |
1279 | * @x1: screen coord | |
1280 | * @y1: screen coord | |
1281 | * @x2: screen coord | |
1282 | * @y2: screen coord | |
1283 | * | |
1284 | * Due to the seemingly undocumented behaviour of gdk_draw_line(), we need to restrict the range of values passed in. | |
1285 | * So despite it accepting gints, the effective range seems to be the actually the minimum C int range (2^16). | |
1286 | * This seems to be limitations coming from the X Window System. | |
1287 | * | |
1288 | * See http://www.rahul.net/kenton/40errs.html | |
1289 | * ERROR 7. Boundary conditions. | |
1290 | * "The X coordinate space is not infinite. | |
1291 | * Most drawing functions limit position, width, and height to 16 bit integers (sometimes signed, sometimes unsigned) of accuracy. | |
1292 | * 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. | |
1293 | * You should be especially careful of this if you are implementing higher level scalable graphics packages." | |
1294 | * | |
1295 | * This function should be called before calling gdk_draw_line(). | |
1296 | */ | |
1297 | void a_viewport_clip_line ( gint *x1, gint *y1, gint *x2, gint *y2 ) | |
1298 | { | |
1299 | if ( *x1 > 32768 || *x1 < -32767 ) | |
1300 | clip_x ( x1, y1, x2, y2 ); | |
1301 | if ( *y1 > 32768 || *y1 < -32767 ) | |
1302 | clip_y ( x1, y1, x2, y2 ); | |
1303 | if ( *x2 > 32768 || *x2 < -32767 ) | |
1304 | clip_x ( x2, y2, x1, y1 ); | |
1305 | if ( *y2 > 32768 || *y2 < -32767 ) | |
1306 | clip_y ( x2, y2, x1, y1 ); | |
1307 | } | |
1308 | ||
50a14534 EB |
1309 | void vik_viewport_draw_line ( VikViewport *vvp, GdkGC *gc, gint x1, gint y1, gint x2, gint y2 ) |
1310 | { | |
1311 | if ( ! ( ( x1 < 0 && x2 < 0 ) || ( y1 < 0 && y2 < 0 ) || | |
d9ffd267 EB |
1312 | ( x1 > vvp->width && x2 > vvp->width ) || ( y1 > vvp->height && y2 > vvp->height ) ) ) { |
1313 | /*** clipping, yeah! ***/ | |
1314 | a_viewport_clip_line ( &x1, &y1, &x2, &y2 ); | |
1315 | gdk_draw_line ( vvp->scr_buffer, gc, x1, y1, x2, y2); | |
1316 | } | |
50a14534 EB |
1317 | } |
1318 | ||
1319 | void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 ) | |
1320 | { | |
add30ebe RN |
1321 | // Using 32 as half the default waypoint image size, so this draws ensures the highlight gets done |
1322 | if ( x1 > -32 && x1 < vvp->width + 32 && y1 > -32 && y1 < vvp->height + 32 ) | |
50a14534 EB |
1323 | gdk_draw_rectangle ( vvp->scr_buffer, gc, filled, x1, y1, x2, y2); |
1324 | } | |
1325 | ||
1326 | void vik_viewport_draw_string ( VikViewport *vvp, GdkFont *font, GdkGC *gc, gint x1, gint y1, const gchar *string ) | |
1327 | { | |
1328 | if ( x1 > -100 && x1 < vvp->width + 100 && y1 > -100 && y1 < vvp->height + 100 ) | |
1329 | gdk_draw_string ( vvp->scr_buffer, font, gc, x1, y1, string ); | |
1330 | } | |
1331 | ||
1332 | /* shouldn't use this -- slow -- change the alpha channel instead. */ | |
1333 | void vik_viewport_draw_pixbuf_with_alpha ( VikViewport *vvp, GdkPixbuf *pixbuf, gint alpha, | |
1334 | gint src_x, gint src_y, gint dest_x, gint dest_y, gint w, gint h ) | |
1335 | { | |
1336 | gint real_dest_x = MAX(dest_x,0); | |
1337 | gint real_dest_y = MAX(dest_y,0); | |
1338 | ||
1339 | if ( alpha == 0 ) | |
1340 | return; /* don't waste your time */ | |
1341 | ||
1342 | if ( w > vvp->alpha_pixbuf_width || h > vvp->alpha_pixbuf_height ) | |
1343 | { | |
1344 | if ( vvp->alpha_pixbuf ) | |
1345 | g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) ); | |
1346 | vvp->alpha_pixbuf_width = MAX(w,vvp->alpha_pixbuf_width); | |
1347 | vvp->alpha_pixbuf_height = MAX(h,vvp->alpha_pixbuf_height); | |
1348 | vvp->alpha_pixbuf = gdk_pixbuf_new ( GDK_COLORSPACE_RGB, FALSE, 8, vvp->alpha_pixbuf_width, vvp->alpha_pixbuf_height ); | |
1349 | } | |
1350 | ||
1351 | w = MIN(w,vvp->width - dest_x); | |
1352 | h = MIN(h,vvp->height - dest_y); | |
1353 | ||
1354 | /* check that we are drawing within boundaries. */ | |
1355 | src_x += (real_dest_x - dest_x); | |
1356 | src_y += (real_dest_y - dest_y); | |
1357 | w -= (real_dest_x - dest_x); | |
1358 | h -= (real_dest_y - dest_y); | |
1359 | ||
1360 | gdk_pixbuf_get_from_drawable ( vvp->alpha_pixbuf, vvp->scr_buffer, NULL, | |
1361 | real_dest_x, real_dest_y, 0, 0, w, h ); | |
1362 | ||
1363 | /* do a composite */ | |
1364 | gdk_pixbuf_composite ( pixbuf, vvp->alpha_pixbuf, 0, 0, w, h, -src_x, -src_y, 1, 1, 0, alpha ); | |
1365 | ||
1366 | /* draw pixbuf_tmp */ | |
1367 | vik_viewport_draw_pixbuf ( vvp, vvp->alpha_pixbuf, 0, 0, real_dest_x, real_dest_y, w, h ); | |
1368 | } | |
1369 | ||
1370 | void vik_viewport_draw_pixbuf ( VikViewport *vvp, GdkPixbuf *pixbuf, gint src_x, gint src_y, | |
1371 | gint dest_x, gint dest_y, gint w, gint h ) | |
1372 | { | |
1373 | gdk_draw_pixbuf ( vvp->scr_buffer, | |
ff37db21 RN |
1374 | NULL, |
1375 | pixbuf, | |
50a14534 EB |
1376 | src_x, src_y, dest_x, dest_y, w, h, |
1377 | GDK_RGB_DITHER_NONE, 0, 0 ); | |
1378 | } | |
1379 | ||
1380 | void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2 ) | |
1381 | { | |
1382 | gdk_draw_arc ( vvp->scr_buffer, gc, filled, x, y, width, height, angle1, angle2 ); | |
1383 | } | |
1384 | ||
1385 | ||
1386 | void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints ) | |
1387 | { | |
1388 | gdk_draw_polygon ( vvp->scr_buffer, gc, filled, points, npoints ); | |
1389 | } | |
1390 | ||
1391 | VikCoordMode vik_viewport_get_coord_mode ( const VikViewport *vvp ) | |
1392 | { | |
1393 | g_assert ( vvp ); | |
1394 | return vvp->coord_mode; | |
1395 | } | |
1396 | ||
1397 | static void viewport_set_coord_mode ( VikViewport *vvp, VikCoordMode mode ) | |
1398 | { | |
1399 | g_return_if_fail ( vvp != NULL ); | |
1400 | vvp->coord_mode = mode; | |
1401 | vik_coord_convert ( &(vvp->center), mode ); | |
1402 | } | |
1403 | ||
1404 | /* Thanks GPSDrive */ | |
1405 | 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 ) | |
1406 | { | |
1407 | int px, py; | |
1408 | gdouble dif, lat, lon; | |
1409 | double Ra = Radius[90+(gint)zero_lat]; | |
1410 | ||
1411 | px = (mapSizeX2 - x) * pixelfact_x; | |
1412 | py = (-mapSizeY2 + y) * pixelfact_y; | |
1413 | ||
1414 | lat = zero_lat - py / Ra; | |
1415 | lat = zero_lat - py / Ra; | |
1416 | lon = | |
1417 | zero_long - | |
1418 | px / (Ra * | |
81765f5e | 1419 | cos (DEG2RAD(lat))); |
50a14534 | 1420 | |
81765f5e | 1421 | dif = lat * (1 - (cos (DEG2RAD(fabs (lon - zero_long))))); |
50a14534 EB |
1422 | lat = lat - dif / 1.5; |
1423 | lon = | |
1424 | zero_long - | |
1425 | px / (Ra * | |
81765f5e | 1426 | cos (DEG2RAD(lat))); |
50a14534 EB |
1427 | |
1428 | *lt = lat; | |
1429 | *lg = lon; | |
1430 | return (TRUE); | |
1431 | } | |
1432 | ||
1433 | /* Thanks GPSDrive */ | |
1434 | 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 ) | |
1435 | { | |
1436 | double dif; | |
1437 | double Ra; | |
1438 | gint mapSizeX = 2 * mapSizeX2; | |
1439 | gint mapSizeY = 2 * mapSizeY2; | |
1440 | ||
1441 | g_assert ( lt >= -90.0 && lt <= 90.0 ); | |
1442 | // lg *= rad2deg; // FIXME, optimize equations | |
1443 | // lt *= rad2deg; | |
1444 | Ra = Radius[90+(gint)lt]; | |
1445 | *x = Ra * | |
81765f5e | 1446 | cos (DEG2RAD(lt)) * (lg - zero_long); |
50a14534 | 1447 | *y = Ra * (lt - zero_lat); |
81765f5e | 1448 | dif = Ra * RAD2DEG(1 - (cos ((DEG2RAD(lg - zero_long))))); |
50a14534 EB |
1449 | *y = *y + dif / 1.85; |
1450 | *x = *x / pixelfact_x; | |
1451 | *y = *y / pixelfact_y; | |
1452 | *x = mapSizeX2 - *x; | |
1453 | *y += mapSizeY2; | |
1454 | if ((*x < 0)||(*x >= mapSizeX)||(*y < 0)||(*y >= mapSizeY)) | |
1455 | return (FALSE); | |
1456 | return (TRUE); | |
1457 | } | |
1458 | ||
1459 | static void viewport_init_ra() | |
1460 | { | |
1461 | static gboolean done_before = FALSE; | |
1462 | if ( !done_before ) | |
1463 | { | |
1464 | gint i; | |
1465 | for ( i = -90; i <= 90; i++) | |
81765f5e | 1466 | Radius[i+90] = calcR ( DEG2RAD((double)i) ); |
50a14534 EB |
1467 | done_before = TRUE; |
1468 | } | |
1469 | } | |
1470 | ||
1471 | double calcR (double lat) | |
1472 | { | |
1473 | double a = 6378.137, r, sc, x, y, z; | |
1474 | double e2 = 0.081082 * 0.081082; | |
1475 | /* | |
1476 | * the radius of curvature of an ellipsoidal Earth in the plane of the | |
1477 | * meridian is given by | |
1478 | * | |
1479 | * R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2) | |
1480 | * | |
1481 | * | |
1482 | * where a is the equatorial radius, b is the polar radius, and e is | |
1483 | * the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2) | |
1484 | * | |
1485 | * a = 6378 km (3963 mi) Equatorial radius (surface to center distance) | |
1486 | * b = 6356.752 km (3950 mi) Polar radius (surface to center distance) e | |
1487 | * = 0.081082 Eccentricity | |
1488 | */ | |
1489 | ||
81765f5e | 1490 | lat = DEG2RAD(lat); |
50a14534 EB |
1491 | sc = sin (lat); |
1492 | x = a * (1.0 - e2); | |
1493 | z = 1.0 - e2 * sc * sc; | |
1494 | y = pow (z, 1.5); | |
1495 | r = x / y; | |
1496 | r = r * 1000.0; | |
1497 | return r; | |
1498 | } | |
1499 | ||
1500 | gboolean vik_viewport_is_one_zone ( VikViewport *vvp ) | |
1501 | { | |
1502 | return vvp->coord_mode == VIK_COORD_UTM && vvp->one_utm_zone; | |
1503 | } | |
1504 | ||
1505 | void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout ) | |
1506 | { | |
1507 | if ( x > -100 && x < vvp->width + 100 && y > -100 && y < vvp->height + 100 ) | |
1508 | gdk_draw_layout ( vvp->scr_buffer, gc, x, y, layout ); | |
1509 | } | |
1510 | ||
1511 | void vik_gc_get_fg_color ( GdkGC *gc, GdkColor *dest ) | |
1512 | { | |
1513 | static GdkGCValues values; | |
1514 | gdk_gc_get_values ( gc, &values ); | |
1515 | gdk_colormap_query_color ( gdk_colormap_get_system(), values.foreground.pixel, dest ); | |
1516 | } | |
1517 | ||
1518 | GdkFunction vik_gc_get_function ( GdkGC *gc ) | |
1519 | { | |
1520 | static GdkGCValues values; | |
1521 | gdk_gc_get_values ( gc, &values ); | |
1522 | return values.function; | |
1523 | } | |
1524 | ||
1525 | void vik_viewport_set_drawmode ( VikViewport *vvp, VikViewportDrawMode drawmode ) | |
1526 | { | |
1527 | vvp->drawmode = drawmode; | |
1528 | if ( drawmode == VIK_VIEWPORT_DRAWMODE_UTM ) | |
1529 | viewport_set_coord_mode ( vvp, VIK_COORD_UTM ); | |
1530 | else { | |
1531 | viewport_set_coord_mode ( vvp, VIK_COORD_LATLON ); | |
50a14534 EB |
1532 | } |
1533 | } | |
1534 | ||
1535 | VikViewportDrawMode vik_viewport_get_drawmode ( VikViewport *vvp ) | |
1536 | { | |
1537 | return vvp->drawmode; | |
1538 | } | |
1539 | ||
0df66d57 EB |
1540 | /******** triggering *******/ |
1541 | void vik_viewport_set_trigger ( VikViewport *vp, gpointer trigger ) | |
1542 | { | |
1543 | vp->trigger = trigger; | |
1544 | } | |
1545 | ||
1546 | gpointer vik_viewport_get_trigger ( VikViewport *vp ) | |
1547 | { | |
1548 | return vp->trigger; | |
1549 | } | |
1550 | ||
1551 | void vik_viewport_snapshot_save ( VikViewport *vp ) | |
1552 | { | |
1553 | gdk_draw_drawable ( vp->snapshot_buffer, vp->background_gc, vp->scr_buffer, 0, 0, 0, 0, -1, -1 ); | |
1554 | } | |
1555 | ||
1556 | void vik_viewport_snapshot_load ( VikViewport *vp ) | |
1557 | { | |
1558 | gdk_draw_drawable ( vp->scr_buffer, vp->background_gc, vp->snapshot_buffer, 0, 0, 0, 0, -1, -1 ); | |
1559 | } | |
1560 | ||
1561 | void vik_viewport_set_half_drawn(VikViewport *vp, gboolean half_drawn) | |
1562 | { | |
1563 | vp->half_drawn = half_drawn; | |
1564 | } | |
1565 | ||
1566 | gboolean vik_viewport_get_half_drawn( VikViewport *vp ) | |
1567 | { | |
1568 | return vp->half_drawn; | |
1569 | } | |
1570 | ||
7bc965c0 GB |
1571 | |
1572 | const gchar *vik_viewport_get_drawmode_name(VikViewport *vv, VikViewportDrawMode mode) | |
0c1044e9 | 1573 | { |
7bc965c0 | 1574 | const gchar *name = NULL; |
24277274 | 1575 | VikWindow *vw = NULL; |
7bc965c0 GB |
1576 | GtkWidget *mode_button; |
1577 | GtkWidget *label; | |
24277274 GB |
1578 | |
1579 | vw = VIK_WINDOW_FROM_WIDGET(vv); | |
1580 | mode_button = vik_window_get_drawmode_button(vw, mode); | |
7bc965c0 GB |
1581 | label = gtk_bin_get_child(GTK_BIN(mode_button)); |
1582 | ||
1583 | name = gtk_label_get_text ( GTK_LABEL(label) ); | |
314c1ccc | 1584 | |
7bc965c0 | 1585 | return name; |
314c1ccc QT |
1586 | |
1587 | } | |
7bc965c0 | 1588 | |
0c1044e9 EB |
1589 | void vik_viewport_get_min_max_lat_lon ( VikViewport *vp, gdouble *min_lat, gdouble *max_lat, gdouble *min_lon, gdouble *max_lon ) |
1590 | { | |
1591 | VikCoord tleft, tright, bleft, bright; | |
1592 | ||
1593 | vik_viewport_screen_to_coord ( vp, 0, 0, &tleft ); | |
1594 | vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright ); | |
1595 | vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft ); | |
1596 | vik_viewport_screen_to_coord ( vp, vp->width, vp->height, &bright ); | |
7bc965c0 | 1597 | |
0c1044e9 EB |
1598 | vik_coord_convert(&tleft, VIK_COORD_LATLON); |
1599 | vik_coord_convert(&tright, VIK_COORD_LATLON); | |
1600 | vik_coord_convert(&bleft, VIK_COORD_LATLON); | |
1601 | vik_coord_convert(&bright, VIK_COORD_LATLON); | |
1602 | ||
1603 | *max_lat = MAX(tleft.north_south, tright.north_south); | |
1604 | *min_lat = MIN(bleft.north_south, bright.north_south); | |
1605 | *max_lon = MAX(tright.east_west, bright.east_west); | |
1606 | *min_lon = MIN(tleft.east_west, bleft.east_west); | |
1607 | } | |
82aa018d GB |
1608 | |
1609 | void vik_viewport_reset_copyrights ( VikViewport *vp ) | |
1610 | { | |
1611 | g_return_if_fail ( vp != NULL ); | |
1612 | g_slist_foreach ( vp->copyrights, (GFunc)g_free, NULL ); | |
1613 | g_slist_free ( vp->copyrights ); | |
1614 | vp->copyrights = NULL; | |
1615 | } | |
1616 | ||
33e0e500 GB |
1617 | /** |
1618 | * vik_viewport_add_copyright: | |
1619 | * @vp: self object | |
1620 | * @copyright: new copyright to display | |
1621 | * | |
1622 | * Add a copyright to display on viewport. | |
1623 | */ | |
82aa018d GB |
1624 | void vik_viewport_add_copyright ( VikViewport *vp, const gchar *copyright ) |
1625 | { | |
1626 | g_return_if_fail ( vp != NULL ); | |
1627 | if ( copyright ) | |
1628 | { | |
bbbd639f | 1629 | GSList *found = g_slist_find_custom ( vp->copyrights, copyright, (GCompareFunc)strcmp ); |
82aa018d GB |
1630 | if ( found == NULL ) |
1631 | { | |
1632 | gchar *duple = g_strdup ( copyright ); | |
1633 | vp->copyrights = g_slist_prepend ( vp->copyrights, duple ); | |
1634 | } | |
1635 | } | |
1636 | } | |
26336cf0 GB |
1637 | |
1638 | void vik_viewport_reset_logos ( VikViewport *vp ) | |
1639 | { | |
1640 | g_return_if_fail ( vp != NULL ); | |
1641 | /* do not free elem */ | |
1642 | g_slist_free ( vp->logos ); | |
1643 | vp->logos = NULL; | |
1644 | } | |
1645 | ||
1646 | void vik_viewport_add_logo ( VikViewport *vp, const GdkPixbuf *logo ) | |
1647 | { | |
1648 | g_return_if_fail ( vp != NULL ); | |
1649 | if ( logo ) | |
1650 | { | |
1651 | GdkPixbuf *found = NULL; /* FIXME (GdkPixbuf*)g_slist_find_custom ( vp->logos, logo, (GCompareFunc)== ); */ | |
1652 | if ( found == NULL ) | |
1653 | { | |
1654 | vp->logos = g_slist_prepend ( vp->logos, (gpointer)logo ); | |
1655 | } | |
1656 | } | |
1657 | } | |
9a3538f5 GB |
1658 | |
1659 | /** | |
1660 | * vik_viewport_compute_bearing: | |
1661 | * @vp: self object | |
1662 | * @x1: screen coord | |
1663 | * @y1: screen coord | |
1664 | * @x2: screen coord | |
1665 | * @y2: screen coord | |
1666 | * @angle: bearing in Radian (output) | |
1667 | * @baseangle: UTM base angle in Radian (output) | |
1668 | * | |
1669 | * Compute bearing. | |
1670 | */ | |
1671 | void vik_viewport_compute_bearing ( VikViewport *vp, gint x1, gint y1, gint x2, gint y2, gdouble *angle, gdouble *baseangle ) | |
1672 | { | |
1673 | gdouble len = sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2)); | |
1674 | gdouble dx = (x2-x1)/len*10; | |
1675 | gdouble dy = (y2-y1)/len*10; | |
1676 | ||
1677 | *angle = atan2(dy, dx) + M_PI_2; | |
1678 | ||
1679 | if ( vik_viewport_get_drawmode ( vp ) == VIK_VIEWPORT_DRAWMODE_UTM) { | |
1680 | VikCoord test; | |
1681 | struct LatLon ll; | |
1682 | struct UTM u; | |
1683 | gint tx, ty; | |
1684 | ||
1685 | vik_viewport_screen_to_coord ( vp, x1, y1, &test ); | |
1686 | vik_coord_to_latlon ( &test, &ll ); | |
1687 | ll.lat += vik_viewport_get_ympp ( vp ) * vik_viewport_get_height ( vp ) / 11000.0; // about 11km per degree latitude | |
1688 | a_coords_latlon_to_utm ( &ll, &u ); | |
1689 | vik_coord_load_from_utm ( &test, VIK_VIEWPORT_DRAWMODE_UTM, &u ); | |
1690 | vik_viewport_coord_to_screen ( vp, &test, &tx, &ty ); | |
1691 | ||
1692 | *baseangle = M_PI - atan2(tx-x1, ty-y1); | |
1693 | *angle -= *baseangle; | |
1694 | } | |
1695 | ||
1696 | if (*angle < 0) | |
1697 | *angle += 2*M_PI; | |
1698 | if (*angle > 2*M_PI) | |
1699 | *angle -= 2*M_PI; | |
1700 | } |