Add missing include glib/gprintf.h
[viking.git] / src / vikgeoreflayer.c
blob9134e9f96aa659ab92f6ec01ecdd90b529d132d9
1 /*
2 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
4 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
26 #include "viking.h"
27 #include <glib.h>
28 #include <glib/gstdio.h>
29 #include <glib/gi18n.h>
30 #include <string.h>
32 #include "icons/icons.h"
34 VikLayerParam georef_layer_params[] = {
35 { "image", VIK_LAYER_PARAM_STRING, VIK_LAYER_NOT_IN_PROPERTIES },
36 { "corner_easting", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_NOT_IN_PROPERTIES },
37 { "corner_northing", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_NOT_IN_PROPERTIES },
38 { "mpp_easting", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_NOT_IN_PROPERTIES },
39 { "mpp_northing", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_NOT_IN_PROPERTIES },
42 enum { PARAM_IMAGE = 0, PARAM_CE, PARAM_CN, PARAM_ME, PARAM_MN, NUM_PARAMS };
44 static void georef_layer_marshall( VikGeorefLayer *vgl, guint8 **data, gint *len );
45 static VikGeorefLayer *georef_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp );
46 static gboolean georef_layer_set_param ( VikGeorefLayer *vgl, guint16 id, VikLayerParamData data, VikViewport *vp );
47 static VikLayerParamData georef_layer_get_param ( VikGeorefLayer *vgl, guint16 id );
48 VikGeorefLayer *georef_layer_new ( );
49 VikGeorefLayer *georef_layer_create ( VikViewport *vp );
50 static void georef_layer_free ( VikGeorefLayer *vgl );
51 gboolean georef_layer_properties ( VikGeorefLayer *vgl, gpointer vp );
52 static void georef_layer_draw ( VikGeorefLayer *vgl, gpointer data );
53 static void georef_layer_add_menu_items ( VikGeorefLayer *vgl, GtkMenu *menu, gpointer vlp );
54 static void georef_layer_set_image ( VikGeorefLayer *vgl, const gchar *image );
55 static gboolean georef_layer_dialog ( VikGeorefLayer **vgl, gpointer vp, GtkWindow *w );
56 static void georef_layer_load_image ( VikGeorefLayer *vgl );
58 /* tools */
59 static gpointer georef_layer_move_create ( VikWindow *vw, VikViewport *vvp);
60 static gboolean georef_layer_move_release ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp );
61 static gboolean georef_layer_move_press ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp );
62 static gpointer georef_layer_zoom_create ( VikWindow *vw, VikViewport *vvp);
63 static gboolean georef_layer_zoom_press ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp );
65 static VikToolInterface georef_tools[] = {
66 { N_("Georef Move Map"), (VikToolConstructorFunc) georef_layer_move_create, NULL, NULL, NULL,
67 (VikToolMouseFunc) georef_layer_move_press, NULL, (VikToolMouseFunc) georef_layer_move_release,
68 (VikToolKeyFunc) NULL, GDK_CURSOR_IS_PIXMAP, &cursor_geomove_pixbuf },
70 { N_("Georef Zoom Tool"), (VikToolConstructorFunc) georef_layer_zoom_create, NULL, NULL, NULL,
71 (VikToolMouseFunc) georef_layer_zoom_press, NULL, NULL,
72 (VikToolKeyFunc) NULL, GDK_CURSOR_IS_PIXMAP, &cursor_geozoom_pixbuf },
75 VikLayerInterface vik_georef_layer_interface = {
76 "GeoRef Map",
77 &vikgeoreflayer_pixbuf, /*icon */
79 georef_tools,
80 sizeof(georef_tools) / sizeof(VikToolInterface),
82 georef_layer_params,
83 NUM_PARAMS,
84 NULL,
87 VIK_MENU_ITEM_ALL,
89 (VikLayerFuncCreate) georef_layer_create,
90 (VikLayerFuncRealize) NULL,
91 (VikLayerFuncPostRead) georef_layer_load_image,
92 (VikLayerFuncFree) georef_layer_free,
94 (VikLayerFuncProperties) georef_layer_properties,
95 (VikLayerFuncDraw) georef_layer_draw,
96 (VikLayerFuncChangeCoordMode) NULL,
98 (VikLayerFuncSetMenuItemsSelection) NULL,
99 (VikLayerFuncGetMenuItemsSelection) NULL,
101 (VikLayerFuncAddMenuItems) georef_layer_add_menu_items,
102 (VikLayerFuncSublayerAddMenuItems) NULL,
104 (VikLayerFuncSublayerRenameRequest) NULL,
105 (VikLayerFuncSublayerToggleVisible) NULL,
107 (VikLayerFuncMarshall) georef_layer_marshall,
108 (VikLayerFuncUnmarshall) georef_layer_unmarshall,
110 (VikLayerFuncSetParam) georef_layer_set_param,
111 (VikLayerFuncGetParam) georef_layer_get_param,
113 (VikLayerFuncReadFileData) NULL,
114 (VikLayerFuncWriteFileData) NULL,
116 (VikLayerFuncDeleteItem) NULL,
117 (VikLayerFuncCopyItem) NULL,
118 (VikLayerFuncPasteItem) NULL,
119 (VikLayerFuncFreeCopiedItem) NULL,
120 (VikLayerFuncDragDropRequest) NULL,
123 struct _VikGeorefLayer {
124 VikLayer vl;
125 gchar *image;
126 GdkPixbuf *pixbuf;
127 struct UTM corner;
128 gdouble mpp_easting, mpp_northing;
129 guint width, height;
131 gint click_x, click_y;
136 GType vik_georef_layer_get_type ()
138 static GType vgl_type = 0;
140 if (!vgl_type)
142 static const GTypeInfo vgl_info =
144 sizeof (VikGeorefLayerClass),
145 NULL, /* base_init */
146 NULL, /* base_finalize */
147 NULL, /* class init */
148 NULL, /* class_finalize */
149 NULL, /* class_data */
150 sizeof (VikGeorefLayer),
152 NULL /* instance init */
154 vgl_type = g_type_register_static ( VIK_LAYER_TYPE, "VikGeorefLayer", &vgl_info, 0 );
157 return vgl_type;
160 static void georef_layer_marshall( VikGeorefLayer *vgl, guint8 **data, gint *len )
162 vik_layer_marshall_params ( VIK_LAYER(vgl), data, len );
165 static VikGeorefLayer *georef_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp )
167 VikGeorefLayer *rv = georef_layer_new ( vvp );
168 vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
169 if (rv->image) {
170 georef_layer_load_image ( rv );
172 return rv;
175 static gboolean georef_layer_set_param ( VikGeorefLayer *vgl, guint16 id, VikLayerParamData data, VikViewport *vp )
177 switch ( id )
179 case PARAM_IMAGE: georef_layer_set_image ( vgl, data.s ); break;
180 case PARAM_CN: vgl->corner.northing = data.d; break;
181 case PARAM_CE: vgl->corner.easting = data.d; break;
182 case PARAM_MN: vgl->mpp_northing = data.d; break;
183 case PARAM_ME: vgl->mpp_easting = data.d; break;
185 return TRUE;
188 static VikLayerParamData georef_layer_get_param ( VikGeorefLayer *vgl, guint16 id )
190 VikLayerParamData rv;
191 switch ( id )
193 case PARAM_IMAGE: rv.s = vgl->image ? vgl->image : ""; break;
194 case PARAM_CN: rv.d = vgl->corner.northing; break;
195 case PARAM_CE: rv.d = vgl->corner.easting; break;
196 case PARAM_MN: rv.d = vgl->mpp_northing; break;
197 case PARAM_ME: rv.d = vgl->mpp_easting; break;
199 return rv;
202 VikGeorefLayer *georef_layer_new ( )
204 VikGeorefLayer *vgl = VIK_GEOREF_LAYER ( g_object_new ( VIK_GEOREF_LAYER_TYPE, NULL ) );
205 vik_layer_init ( VIK_LAYER(vgl), VIK_LAYER_GEOREF );
207 vgl->image = NULL;
208 vgl->pixbuf = NULL;
209 vgl->click_x = -1;
210 vgl->click_y = -1;
211 return vgl;
214 static void georef_layer_draw ( VikGeorefLayer *vgl, gpointer data )
216 /* bla, bla */
217 if ( vgl->pixbuf )
219 VikViewport *vp = VIK_VIEWPORT(data);
220 struct UTM utm_middle;
221 gdouble xmpp = vik_viewport_get_xmpp(vp), ympp = vik_viewport_get_ympp(vp);
222 vik_coord_to_utm ( vik_viewport_get_center ( vp ), &utm_middle );
224 if ( xmpp == vgl->mpp_easting && ympp == vgl->mpp_northing )
226 guint width = vik_viewport_get_width(vp), height = vik_viewport_get_height(vp);
227 gint32 x, y;
228 vgl->corner.zone = utm_middle.zone;
229 vgl->corner.letter = utm_middle.letter;
230 VikCoord corner_coord;
231 vik_coord_load_from_utm ( &corner_coord, vik_viewport_get_coord_mode(vp), &(vgl->corner) );
232 vik_viewport_coord_to_screen ( vp, &corner_coord, &x, &y );
233 if ( (x < 0 || x < width) && (y < 0 || y < height) && x+vgl->width > 0 && y+vgl->height > 0 )
234 vik_viewport_draw_pixbuf ( vp, vgl->pixbuf, 0, 0, x, y, vgl->width, vgl->height ); /* todo: draw only what we need to. */
239 static void georef_layer_free ( VikGeorefLayer *vgl )
241 if ( vgl->image != NULL )
242 g_free ( vgl->image );
245 VikGeorefLayer *georef_layer_create ( VikViewport *vp )
247 return georef_layer_new ();
250 gboolean georef_layer_properties ( VikGeorefLayer *vgl, gpointer vp )
252 return georef_layer_dialog ( &vgl, vp, VIK_GTK_WINDOW_FROM_WIDGET(vp) );
255 static void georef_layer_load_image ( VikGeorefLayer *vgl )
257 GError *gx = NULL;
258 if ( vgl->image == NULL )
259 return;
261 if ( vgl->pixbuf )
262 g_object_unref ( G_OBJECT(vgl->pixbuf) );
264 vgl->pixbuf = gdk_pixbuf_new_from_file ( vgl->image, &gx );
266 if (gx)
268 g_warning ( _("Couldn't open image file: %s"), gx->message );
269 g_error_free ( gx );
271 else
273 vgl->width = gdk_pixbuf_get_width ( vgl->pixbuf );
274 vgl->height = gdk_pixbuf_get_height ( vgl->pixbuf );
277 /* should find length and width here too */
280 static void georef_layer_set_image ( VikGeorefLayer *vgl, const gchar *image )
282 if ( vgl->image )
283 g_free ( vgl->image );
284 if ( image == NULL )
285 vgl->image = NULL;
286 vgl->image = g_strdup ( image );
289 static gboolean world_file_read_line ( gchar *buffer, gint size, FILE *f, GtkWidget *widget, gboolean use_value )
291 if (!fgets ( buffer, 1024, f ))
293 a_dialog_error_msg ( VIK_GTK_WINDOW_FROM_WIDGET(widget), _("Unexpected end of file reading World file.") );
294 g_free ( buffer );
295 fclose ( f );
296 f = NULL;
297 return FALSE;
299 if ( use_value )
301 gdouble val = g_strtod ( buffer, NULL );
302 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(widget), val > 0 ? val : -val );
304 return TRUE;
307 static void georef_layer_dialog_load ( GtkWidget *pass_along[4] )
309 GtkWidget *file_selector = gtk_file_chooser_dialog_new (_("Choose World file"),
310 NULL,
311 GTK_FILE_CHOOSER_ACTION_OPEN,
312 GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
313 GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
314 NULL);
316 if ( gtk_dialog_run ( GTK_DIALOG ( file_selector ) ) == GTK_RESPONSE_ACCEPT )
318 FILE *f = g_fopen ( gtk_file_chooser_get_filename ( GTK_FILE_CHOOSER(file_selector) ), "r" );
319 gtk_widget_destroy ( file_selector );
320 if ( !f )
322 a_dialog_error_msg ( VIK_GTK_WINDOW_FROM_WIDGET(pass_along[0]), _("The World file you requested could not be opened for reading.") );
323 return;
325 else
327 gchar *buffer = g_malloc ( 1024 * sizeof(gchar) );
328 if ( world_file_read_line ( buffer, 1024, f, pass_along[0], TRUE ) && world_file_read_line ( buffer, 1024, f, pass_along[0], FALSE)
329 && world_file_read_line ( buffer, 1024, f, pass_along[0], FALSE ) && world_file_read_line ( buffer, 1024, f, pass_along[1], TRUE)
330 && world_file_read_line ( buffer, 1024, f, pass_along[2], TRUE ) && world_file_read_line ( buffer, 1024, f, pass_along[3], TRUE ) )
332 g_free ( buffer );
333 fclose ( f );
334 f = NULL;
338 else
339 gtk_widget_destroy ( file_selector );
340 /* do your jazz
341 We need a
342 file selection dialog
343 file opener for reading, if NULL, send error_msg ( VIK_GTK_WINDOW_FROM_WIDGET(pass_along[0]) )
344 does that catch directories too?
345 read lines -- if not enough lines, give error.
346 if anything outside, give error. define range with #define CONSTANTS
347 put 'em in thar widgets, and that's it.
351 static void georef_layer_export_params ( gpointer *pass_along[2] )
353 VikGeorefLayer *vgl = VIK_GEOREF_LAYER(pass_along[0]);
354 GtkWidget *file_selector = gtk_file_chooser_dialog_new (_("Choose World file"),
355 NULL,
356 GTK_FILE_CHOOSER_ACTION_SAVE,
357 GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
358 GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
359 NULL);
360 if ( gtk_dialog_run ( GTK_DIALOG ( file_selector ) ) == GTK_RESPONSE_ACCEPT )
362 FILE *f = g_fopen ( gtk_file_chooser_get_filename ( GTK_FILE_CHOOSER(file_selector) ), "w" );
364 gtk_widget_destroy ( file_selector );
365 if ( !f )
367 a_dialog_error_msg ( VIK_GTK_WINDOW_FROM_WIDGET(pass_along[0]), _("The file you requested could not be opened for writing.") );
368 return;
370 else
372 fprintf ( f, "%f\n%f\n%f\n%f\n%f\n%f\n", vgl->mpp_easting, vgl->mpp_northing, 0.0, 0.0, vgl->corner.easting, vgl->corner.northing );
373 fclose ( f );
374 f = NULL;
377 else
378 gtk_widget_destroy ( file_selector );
381 /* returns TRUE if OK was pressed. */
382 static gboolean georef_layer_dialog ( VikGeorefLayer **vgl, gpointer vp, GtkWindow *w )
384 GtkWidget *dialog = gtk_dialog_new_with_buttons (_("Layer Properties"),
386 GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
387 GTK_STOCK_CANCEL,
388 GTK_RESPONSE_REJECT,
389 GTK_STOCK_OK,
390 GTK_RESPONSE_ACCEPT,
391 NULL );
392 GtkWidget *table, *wfp_hbox, *wfp_label, *wfp_button, *ce_label, *ce_spin, *cn_label, *cn_spin, *xlabel, *xspin, *ylabel, *yspin, *imagelabel, *imageentry;
394 GtkWidget *pass_along[4];
396 table = gtk_table_new ( 6, 2, FALSE );
397 gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), table, TRUE, TRUE, 0 );
399 wfp_hbox = gtk_hbox_new ( FALSE, 0 );
400 wfp_label = gtk_label_new ( _("World File Parameters:") );
401 wfp_button = gtk_button_new_with_label ( _("Load From File...") );
403 gtk_box_pack_start ( GTK_BOX(wfp_hbox), wfp_label, TRUE, TRUE, 0 );
404 gtk_box_pack_start ( GTK_BOX(wfp_hbox), wfp_button, FALSE, FALSE, 3 );
406 ce_label = gtk_label_new ( _("Corner pixel easting:") );
407 ce_spin = gtk_spin_button_new ( (GtkAdjustment *) gtk_adjustment_new ( 4, 0.0, 1500000.0, 1, 5, 5 ), 1, 4 );
409 cn_label = gtk_label_new ( _("Corner pixel northing:") );
410 cn_spin = gtk_spin_button_new ( (GtkAdjustment *) gtk_adjustment_new ( 4, 0.0, 9000000.0, 1, 5, 5 ), 1, 4 );
412 xlabel = gtk_label_new ( _("X (easting) scale (mpp): "));
413 ylabel = gtk_label_new ( _("Y (northing) scale (mpp): "));
415 xspin = gtk_spin_button_new ( (GtkAdjustment *) gtk_adjustment_new ( 4, VIK_VIEWPORT_MIN_ZOOM, VIK_VIEWPORT_MAX_ZOOM, 1, 5, 5 ), 1, 8 );
416 yspin = gtk_spin_button_new ( (GtkAdjustment *) gtk_adjustment_new ( 4, VIK_VIEWPORT_MIN_ZOOM, VIK_VIEWPORT_MAX_ZOOM, 1, 5, 5 ), 1, 8 );
418 imagelabel = gtk_label_new ( _("Map Image:") );
419 imageentry = vik_file_entry_new (GTK_FILE_CHOOSER_ACTION_OPEN);
421 if (*vgl)
423 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(ce_spin), (*vgl)->corner.easting );
424 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(cn_spin), (*vgl)->corner.northing );
425 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(xspin), (*vgl)->mpp_easting );
426 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(yspin), (*vgl)->mpp_northing );
427 if ( (*vgl)->image )
428 vik_file_entry_set_filename ( VIK_FILE_ENTRY(imageentry), (*vgl)->image );
430 else
432 VikCoord corner_coord;
433 struct UTM utm;
434 vik_viewport_screen_to_coord ( VIK_VIEWPORT(vp), 0, 0, &corner_coord );
435 vik_coord_to_utm ( &corner_coord, &utm );
436 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(ce_spin), utm.easting );
437 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(cn_spin), utm.northing );
438 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(xspin), vik_viewport_get_xmpp ( VIK_VIEWPORT(vp) ) );
439 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(yspin), vik_viewport_get_ympp ( VIK_VIEWPORT(vp) ) );
442 gtk_table_attach_defaults ( GTK_TABLE(table), imagelabel, 0, 1, 0, 1 );
443 gtk_table_attach_defaults ( GTK_TABLE(table), imageentry, 1, 2, 0, 1 );
444 gtk_table_attach_defaults ( GTK_TABLE(table), wfp_hbox, 0, 2, 1, 2 );
445 gtk_table_attach_defaults ( GTK_TABLE(table), xlabel, 0, 1, 2, 3 );
446 gtk_table_attach_defaults ( GTK_TABLE(table), xspin, 1, 2, 2, 3 );
447 gtk_table_attach_defaults ( GTK_TABLE(table), ylabel, 0, 1, 3, 4 );
448 gtk_table_attach_defaults ( GTK_TABLE(table), yspin, 1, 2, 3, 4 );
449 gtk_table_attach_defaults ( GTK_TABLE(table), ce_label, 0, 1, 4, 5 );
450 gtk_table_attach_defaults ( GTK_TABLE(table), ce_spin, 1, 2, 4, 5 );
451 gtk_table_attach_defaults ( GTK_TABLE(table), cn_label, 0, 1, 5, 6 );
452 gtk_table_attach_defaults ( GTK_TABLE(table), cn_spin, 1, 2, 5, 6 );
454 pass_along[0] = xspin;
455 pass_along[1] = yspin;
456 pass_along[2] = ce_spin;
457 pass_along[3] = cn_spin;
458 g_signal_connect_swapped ( G_OBJECT(wfp_button), "clicked", G_CALLBACK(georef_layer_dialog_load), pass_along );
460 gtk_widget_show_all ( table );
462 if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) == GTK_RESPONSE_ACCEPT )
464 if (! *vgl)
466 *vgl = georef_layer_new ();
467 vik_layer_rename ( VIK_LAYER(*vgl), vik_georef_layer_interface.name );
469 (*vgl)->corner.easting = gtk_spin_button_get_value ( GTK_SPIN_BUTTON(ce_spin) );
470 (*vgl)->corner.northing = gtk_spin_button_get_value ( GTK_SPIN_BUTTON(cn_spin) );
471 (*vgl)->mpp_easting = gtk_spin_button_get_value ( GTK_SPIN_BUTTON(xspin) );
472 (*vgl)->mpp_northing = gtk_spin_button_get_value ( GTK_SPIN_BUTTON(yspin) );
473 if ( (!(*vgl)->image) || strcmp( (*vgl)->image, vik_file_entry_get_filename(VIK_FILE_ENTRY(imageentry)) ) != 0 )
475 georef_layer_set_image ( *vgl, vik_file_entry_get_filename(VIK_FILE_ENTRY(imageentry)) );
476 georef_layer_load_image ( *vgl );
479 gtk_widget_destroy ( GTK_WIDGET(dialog) );
480 return TRUE;
482 gtk_widget_destroy ( GTK_WIDGET(dialog) );
483 return FALSE;
486 static void georef_layer_zoom_to_fit ( gpointer vgl_vlp[2] )
488 vik_viewport_set_xmpp ( vik_layers_panel_get_viewport(VIK_LAYERS_PANEL(vgl_vlp[1])), VIK_GEOREF_LAYER(vgl_vlp[0])->mpp_easting );
489 vik_viewport_set_ympp ( vik_layers_panel_get_viewport(VIK_LAYERS_PANEL(vgl_vlp[1])), VIK_GEOREF_LAYER(vgl_vlp[0])->mpp_northing );
490 vik_layers_panel_emit_update ( VIK_LAYERS_PANEL(vgl_vlp[1]) );
493 static void georef_layer_goto_center ( gpointer vgl_vlp[2] )
495 VikGeorefLayer *vgl = VIK_GEOREF_LAYER ( vgl_vlp[0] );
496 VikViewport *vp = vik_layers_panel_get_viewport(VIK_LAYERS_PANEL(vgl_vlp[1]));
497 struct UTM utm;
498 VikCoord coord;
500 vik_coord_to_utm ( vik_viewport_get_center ( vp ), &utm );
502 utm.easting = vgl->corner.easting + (vgl->width * vgl->mpp_easting / 2); /* only an approximation */
503 utm.northing = vgl->corner.northing - (vgl->height * vgl->mpp_northing / 2);
505 vik_coord_load_from_utm ( &coord, vik_viewport_get_coord_mode ( vp ), &utm );
506 vik_viewport_set_center_coord ( vp, &coord );
508 vik_layers_panel_emit_update ( VIK_LAYERS_PANEL(vgl_vlp[1]) );
511 static void georef_layer_add_menu_items ( VikGeorefLayer *vgl, GtkMenu *menu, gpointer vlp )
513 static gpointer pass_along[2];
514 GtkWidget *item;
515 pass_along[0] = vgl;
516 pass_along[1] = vlp;
518 item = gtk_menu_item_new();
519 gtk_menu_shell_append ( GTK_MENU_SHELL(menu), item );
520 gtk_widget_show ( item );
522 item = gtk_menu_item_new_with_label ( _("Zoom to Fit Map") );
523 g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(georef_layer_zoom_to_fit), pass_along );
524 gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
525 gtk_widget_show ( item );
527 item = gtk_menu_item_new_with_label ( _("Goto Map Center") );
528 g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(georef_layer_goto_center), pass_along );
529 gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
530 gtk_widget_show ( item );
532 item = gtk_menu_item_new_with_label ( _("Export to World File") );
533 g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(georef_layer_export_params), pass_along );
534 gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
535 gtk_widget_show ( item );
539 static gpointer georef_layer_move_create ( VikWindow *vw, VikViewport *vvp)
541 return vvp;
544 static gboolean georef_layer_move_release ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp )
546 if (!vgl || vgl->vl.type != VIK_LAYER_GEOREF)
547 return FALSE;
549 if ( vgl->click_x != -1 )
551 vgl->corner.easting += (event->x - vgl->click_x) * vik_viewport_get_xmpp (vvp);
552 vgl->corner.northing -= (event->y - vgl->click_y) * vik_viewport_get_ympp (vvp);
553 vik_layer_emit_update ( VIK_LAYER(vgl) );
554 return TRUE;
556 return FALSE; /* I didn't move anything on this layer! */
559 static gpointer georef_layer_zoom_create ( VikWindow *vw, VikViewport *vvp)
561 return vvp;
564 static gboolean georef_layer_zoom_press ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp )
566 if (!vgl || vgl->vl.type != VIK_LAYER_GEOREF)
567 return FALSE;
568 if ( event->button == 1 )
570 if ( vgl->mpp_easting < (VIK_VIEWPORT_MAX_ZOOM / 1.05) && vgl->mpp_northing < (VIK_VIEWPORT_MAX_ZOOM / 1.05) )
572 vgl->mpp_easting *= 1.01;
573 vgl->mpp_northing *= 1.01;
576 else
578 if ( vgl->mpp_easting > (VIK_VIEWPORT_MIN_ZOOM * 1.05) && vgl->mpp_northing > (VIK_VIEWPORT_MIN_ZOOM * 1.05) )
580 vgl->mpp_easting /= 1.01;
581 vgl->mpp_northing /= 1.01;
584 vik_viewport_set_xmpp ( vvp, vgl->mpp_easting );
585 vik_viewport_set_ympp ( vvp, vgl->mpp_northing );
586 vik_layer_emit_update ( VIK_LAYER(vgl) );
587 return TRUE;
590 static gboolean georef_layer_move_press ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp )
592 if (!vgl || vgl->vl.type != VIK_LAYER_GEOREF)
593 return FALSE;
594 vgl->click_x = event->x;
595 vgl->click_y = event->y;
596 return TRUE;