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
23 #include "vikgeoreflayer_pixmap.h"
27 VikLayerParam georef_layer_params[] = {
28 { "image", VIK_LAYER_PARAM_STRING, VIK_LAYER_NOT_IN_PROPERTIES },
29 { "corner_easting", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_NOT_IN_PROPERTIES },
30 { "corner_northing", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_NOT_IN_PROPERTIES },
31 { "mpp_easting", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_NOT_IN_PROPERTIES },
32 { "mpp_northing", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_NOT_IN_PROPERTIES },
35 enum { PARAM_IMAGE = 0, PARAM_CE, PARAM_CN, PARAM_ME, PARAM_MN, NUM_PARAMS };
37 static void georef_layer_marshall( VikGeorefLayer *vgl, guint8 **data, gint *len );
38 static VikGeorefLayer *georef_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp );
39 static VikGeorefLayer *georef_layer_copy ( VikGeorefLayer *vgl, gpointer vp );
40 static gboolean georef_layer_set_param ( VikGeorefLayer *vgl, guint16 id, VikLayerParamData data, VikViewport *vp );
41 static VikLayerParamData georef_layer_get_param ( VikGeorefLayer *vgl, guint16 id );
42 VikGeorefLayer *georef_layer_new ( );
43 VikGeorefLayer *georef_layer_create ( VikViewport *vp );
44 static void georef_layer_free ( VikGeorefLayer *vgl );
45 gboolean georef_layer_properties ( VikGeorefLayer *vgl, gpointer vp );
46 static void georef_layer_draw ( VikGeorefLayer *vgl, gpointer data );
47 static void georef_layer_add_menu_items ( VikGeorefLayer *vgl, GtkMenu *menu, gpointer vlp );
48 static void georef_layer_set_image ( VikGeorefLayer *vgl, const gchar *image );
49 static gboolean georef_layer_dialog ( VikGeorefLayer **vgl, gpointer vp, GtkWindow *w );
50 static void georef_layer_load_image ( VikGeorefLayer *vgl );
53 static gpointer georef_layer_move_create ( VikWindow *vw, VikViewport *vvp);
54 static gboolean georef_layer_move_release ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp );
55 static gboolean georef_layer_move_press ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp );
56 static gpointer georef_layer_zoom_create ( VikWindow *vw, VikViewport *vvp);
57 static gboolean georef_layer_zoom_press ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp );
59 static VikToolInterface georef_tools[] = {
60 { "Georef Move Map", (VikToolConstructorFunc) georef_layer_move_create, NULL, NULL, NULL,
61 (VikToolMouseFunc) georef_layer_move_press, NULL, (VikToolMouseFunc) georef_layer_move_release },
63 { "Georef Zoom Tool", (VikToolConstructorFunc) georef_layer_zoom_create, NULL, NULL, NULL,
64 (VikToolMouseFunc) georef_layer_zoom_press, NULL, NULL },
67 VikLayerInterface vik_georef_layer_interface = {
69 &georeflayer_pixbuf, /*icon */
72 sizeof(georef_tools) / sizeof(VikToolInterface),
79 (VikLayerFuncCreate) georef_layer_create,
80 (VikLayerFuncRealize) NULL,
81 (VikLayerFuncPostRead) georef_layer_load_image,
82 (VikLayerFuncFree) georef_layer_free,
84 (VikLayerFuncProperties) georef_layer_properties,
85 (VikLayerFuncDraw) georef_layer_draw,
86 (VikLayerFuncChangeCoordMode) NULL,
88 (VikLayerFuncAddMenuItems) georef_layer_add_menu_items,
89 (VikLayerFuncSublayerAddMenuItems) NULL,
91 (VikLayerFuncSublayerRenameRequest) NULL,
92 (VikLayerFuncSublayerToggleVisible) NULL,
94 (VikLayerFuncCopy) georef_layer_copy,
95 (VikLayerFuncMarshall) georef_layer_marshall,
96 (VikLayerFuncUnmarshall) georef_layer_unmarshall,
98 (VikLayerFuncSetParam) georef_layer_set_param,
99 (VikLayerFuncGetParam) georef_layer_get_param,
101 (VikLayerFuncReadFileData) NULL,
102 (VikLayerFuncWriteFileData) NULL,
104 (VikLayerFuncDeleteItem) NULL,
105 (VikLayerFuncCopyItem) NULL,
106 (VikLayerFuncPasteItem) NULL,
107 (VikLayerFuncFreeCopiedItem) NULL,
108 (VikLayerFuncDragDropRequest) NULL,
111 struct _VikGeorefLayer {
116 gdouble mpp_easting, mpp_northing;
119 gint click_x, click_y;
124 GType vik_georef_layer_get_type ()
126 static GType vgl_type = 0;
130 static const GTypeInfo vgl_info =
132 sizeof (VikGeorefLayerClass),
133 NULL, /* base_init */
134 NULL, /* base_finalize */
135 NULL, /* class init */
136 NULL, /* class_finalize */
137 NULL, /* class_data */
138 sizeof (VikGeorefLayer),
140 NULL /* instance init */
142 vgl_type = g_type_register_static ( VIK_LAYER_TYPE, "VikGeorefLayer", &vgl_info, 0 );
148 static VikGeorefLayer *georef_layer_copy ( VikGeorefLayer *vgl, gpointer vp )
150 VikGeorefLayer *rv = georef_layer_new ();
151 rv->corner = vgl->corner;
152 rv->mpp_easting = vgl->mpp_easting;
153 rv->mpp_northing = vgl->mpp_northing;
154 rv->width = vgl->width;
155 rv->height = vgl->height;
159 rv->image = g_strdup ( vgl->image );
160 georef_layer_load_image ( rv );
165 static void georef_layer_marshall( VikGeorefLayer *vgl, guint8 **data, gint *len )
167 vik_layer_marshall_params ( VIK_LAYER(vgl), data, len );
170 static VikGeorefLayer *georef_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp )
172 VikGeorefLayer *rv = georef_layer_new ( vvp );
173 vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
175 georef_layer_load_image ( rv );
180 static gboolean georef_layer_set_param ( VikGeorefLayer *vgl, guint16 id, VikLayerParamData data, VikViewport *vp )
184 case PARAM_IMAGE: georef_layer_set_image ( vgl, data.s ); break;
185 case PARAM_CN: vgl->corner.northing = data.d; break;
186 case PARAM_CE: vgl->corner.easting = data.d; break;
187 case PARAM_MN: vgl->mpp_northing = data.d; break;
188 case PARAM_ME: vgl->mpp_easting = data.d; break;
193 static VikLayerParamData georef_layer_get_param ( VikGeorefLayer *vgl, guint16 id )
195 VikLayerParamData rv;
198 case PARAM_IMAGE: rv.s = vgl->image ? vgl->image : ""; break;
199 case PARAM_CN: rv.d = vgl->corner.northing; break;
200 case PARAM_CE: rv.d = vgl->corner.easting; break;
201 case PARAM_MN: rv.d = vgl->mpp_northing; break;
202 case PARAM_ME: rv.d = vgl->mpp_easting; break;
207 VikGeorefLayer *georef_layer_new ( )
209 VikGeorefLayer *vgl = VIK_GEOREF_LAYER ( g_object_new ( VIK_GEOREF_LAYER_TYPE, NULL ) );
210 vik_layer_init ( VIK_LAYER(vgl), VIK_LAYER_GEOREF );
219 static void georef_layer_draw ( VikGeorefLayer *vgl, gpointer data )
224 VikViewport *vp = VIK_VIEWPORT(data);
225 struct UTM utm_middle;
226 gdouble xmpp = vik_viewport_get_xmpp(vp), ympp = vik_viewport_get_ympp(vp);
227 vik_coord_to_utm ( vik_viewport_get_center ( vp ), &utm_middle );
229 if ( xmpp == vgl->mpp_easting && ympp == vgl->mpp_northing )
231 guint width = vik_viewport_get_width(vp), height = vik_viewport_get_height(vp);
233 vgl->corner.zone = utm_middle.zone;
234 vgl->corner.letter = utm_middle.letter;
235 VikCoord corner_coord;
236 vik_coord_load_from_utm ( &corner_coord, vik_viewport_get_coord_mode(vp), &(vgl->corner) );
237 vik_viewport_coord_to_screen ( vp, &corner_coord, &x, &y );
238 if ( (x < 0 || x < width) && (y < 0 || y < height) && x+vgl->width > 0 && y+vgl->height > 0 )
239 vik_viewport_draw_pixbuf ( vp, vgl->pixbuf, 0, 0, x, y, vgl->width, vgl->height ); /* todo: draw only what we need to. */
244 static void georef_layer_free ( VikGeorefLayer *vgl )
246 if ( vgl->image != NULL )
247 g_free ( vgl->image );
250 VikGeorefLayer *georef_layer_create ( VikViewport *vp )
252 return georef_layer_new ();
255 gboolean georef_layer_properties ( VikGeorefLayer *vgl, gpointer vp )
257 return georef_layer_dialog ( &vgl, vp, VIK_GTK_WINDOW_FROM_WIDGET(vp) );
260 static void georef_layer_load_image ( VikGeorefLayer *vgl )
263 if ( vgl->image == NULL )
267 g_object_unref ( G_OBJECT(vgl->pixbuf) );
269 vgl->pixbuf = gdk_pixbuf_new_from_file ( vgl->image, &gx );
273 g_warning ( "Couldn't open image file: %s", gx->message );
278 vgl->width = gdk_pixbuf_get_width ( vgl->pixbuf );
279 vgl->height = gdk_pixbuf_get_height ( vgl->pixbuf );
282 /* should find length and width here too */
285 static void georef_layer_set_image ( VikGeorefLayer *vgl, const gchar *image )
288 g_free ( vgl->image );
291 vgl->image = g_strdup ( image );
294 static gboolean world_file_read_line ( gchar *buffer, gint size, FILE *f, GtkWidget *widget, gboolean use_value )
296 if (!fgets ( buffer, 1024, f ))
298 a_dialog_error_msg ( VIK_GTK_WINDOW_FROM_WIDGET(widget), "Unexpected end of file reading World file." );
305 gdouble val = strtod ( buffer, NULL );
306 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(widget), val > 0 ? val : -val );
311 static void georef_layer_dialog_load ( GtkWidget *pass_along[4] )
313 GtkWidget *file_selector = gtk_file_selection_new ("Choose World file");
315 if ( gtk_dialog_run ( GTK_DIALOG ( file_selector ) ) == GTK_RESPONSE_OK )
317 FILE *f = fopen ( gtk_file_selection_get_filename ( GTK_FILE_SELECTION(file_selector) ), "r" );
318 gtk_widget_destroy ( file_selector );
321 a_dialog_error_msg ( VIK_GTK_WINDOW_FROM_WIDGET(pass_along[0]), "The World file you requested could not be opened for reading." );
326 gchar *buffer = g_malloc ( 1024 * sizeof(gchar) );
327 if ( world_file_read_line ( buffer, 1024, f, pass_along[0], TRUE ) && world_file_read_line ( buffer, 1024, f, pass_along[1], TRUE )
328 && world_file_read_line ( buffer, 1024, f, pass_along[0], FALSE ) && world_file_read_line ( buffer, 1024, f, pass_along[0], FALSE )
329 && world_file_read_line ( buffer, 1024, f, pass_along[2], TRUE ) && world_file_read_line ( buffer, 1024, f, pass_along[3], TRUE ) )
337 gtk_widget_destroy ( file_selector );
340 file selection dialog
341 file opener for reading, if NULL, send error_msg ( VIK_GTK_WINDOW_FROM_WIDGET(pass_along[0]) )
342 does that catch directories too?
343 read lines -- if not enough lines, give error.
344 if anything outside, give error. define range with #define CONSTANTS
345 put 'em in thar widgets, and that's it.
349 static void georef_layer_export_params ( gpointer *pass_along[2] )
351 VikGeorefLayer *vgl = VIK_GEOREF_LAYER(pass_along[0]);
352 GtkWidget *file_selector = gtk_file_selection_new ("Choose World file");
354 if ( gtk_dialog_run ( GTK_DIALOG ( file_selector ) ) == GTK_RESPONSE_OK )
356 FILE *f = fopen ( gtk_file_selection_get_filename ( GTK_FILE_SELECTION(file_selector) ), "w" );
357 gtk_widget_destroy ( file_selector );
360 a_dialog_error_msg ( VIK_GTK_WINDOW_FROM_WIDGET(pass_along[0]), "The file you requested could not be opened for writing." );
365 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 );
370 gtk_widget_destroy ( file_selector );
373 /* returns TRUE if OK was pressed. */
374 static gboolean georef_layer_dialog ( VikGeorefLayer **vgl, gpointer vp, GtkWindow *w )
376 GtkWidget *dialog = gtk_dialog_new_with_buttons ("Layer Properties",
378 GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
384 GtkWidget *table, *wfp_hbox, *wfp_label, *wfp_button, *ce_label, *ce_spin, *cn_label, *cn_spin, *xlabel, *xspin, *ylabel, *yspin, *imagelabel, *imageentry;
386 GtkWidget *pass_along[4];
388 table = gtk_table_new ( 6, 2, FALSE );
389 gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), table, TRUE, TRUE, 0 );
391 wfp_hbox = gtk_hbox_new ( FALSE, 0 );
392 wfp_label = gtk_label_new ( "World File Parameters:" );
393 wfp_button = gtk_button_new_with_label ( "Load From File..." );
395 gtk_box_pack_start ( GTK_BOX(wfp_hbox), wfp_label, TRUE, TRUE, 0 );
396 gtk_box_pack_start ( GTK_BOX(wfp_hbox), wfp_button, FALSE, FALSE, 3 );
398 ce_label = gtk_label_new ( "Corner pixel easting:" );
399 ce_spin = gtk_spin_button_new ( (GtkAdjustment *) gtk_adjustment_new ( 4, 0.0, 1500000.0, 1, 5, 5 ), 1, 4 );
401 cn_label = gtk_label_new ( "Corner pixel northing:" );
402 cn_spin = gtk_spin_button_new ( (GtkAdjustment *) gtk_adjustment_new ( 4, 0.0, 9000000.0, 1, 5, 5 ), 1, 4 );
404 xlabel = gtk_label_new ( "X (easting) scale (mpp): ");
405 ylabel = gtk_label_new ( "Y (northing) scale (mpp): ");
407 xspin = gtk_spin_button_new ( (GtkAdjustment *) gtk_adjustment_new ( 4, VIK_VIEWPORT_MIN_ZOOM, VIK_VIEWPORT_MAX_ZOOM, 1, 5, 5 ), 1, 8 );
408 yspin = gtk_spin_button_new ( (GtkAdjustment *) gtk_adjustment_new ( 4, VIK_VIEWPORT_MIN_ZOOM, VIK_VIEWPORT_MAX_ZOOM, 1, 5, 5 ), 1, 8 );
410 imagelabel = gtk_label_new ( "Map Image:" );
411 imageentry = vik_file_entry_new ();
415 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(ce_spin), (*vgl)->corner.easting );
416 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(cn_spin), (*vgl)->corner.northing );
417 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(xspin), (*vgl)->mpp_easting );
418 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(yspin), (*vgl)->mpp_northing );
420 vik_file_entry_set_filename ( VIK_FILE_ENTRY(imageentry), (*vgl)->image );
424 VikCoord corner_coord;
426 vik_viewport_screen_to_coord ( VIK_VIEWPORT(vp), 0, 0, &corner_coord );
427 vik_coord_to_utm ( &corner_coord, &utm );
428 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(ce_spin), utm.easting );
429 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(cn_spin), utm.northing );
430 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(xspin), vik_viewport_get_xmpp ( VIK_VIEWPORT(vp) ) );
431 gtk_spin_button_set_value ( GTK_SPIN_BUTTON(yspin), vik_viewport_get_ympp ( VIK_VIEWPORT(vp) ) );
434 gtk_table_attach_defaults ( GTK_TABLE(table), imagelabel, 0, 1, 0, 1 );
435 gtk_table_attach_defaults ( GTK_TABLE(table), imageentry, 1, 2, 0, 1 );
436 gtk_table_attach_defaults ( GTK_TABLE(table), wfp_hbox, 0, 2, 1, 2 );
437 gtk_table_attach_defaults ( GTK_TABLE(table), xlabel, 0, 1, 2, 3 );
438 gtk_table_attach_defaults ( GTK_TABLE(table), xspin, 1, 2, 2, 3 );
439 gtk_table_attach_defaults ( GTK_TABLE(table), ylabel, 0, 1, 3, 4 );
440 gtk_table_attach_defaults ( GTK_TABLE(table), yspin, 1, 2, 3, 4 );
441 gtk_table_attach_defaults ( GTK_TABLE(table), ce_label, 0, 1, 4, 5 );
442 gtk_table_attach_defaults ( GTK_TABLE(table), ce_spin, 1, 2, 4, 5 );
443 gtk_table_attach_defaults ( GTK_TABLE(table), cn_label, 0, 1, 5, 6 );
444 gtk_table_attach_defaults ( GTK_TABLE(table), cn_spin, 1, 2, 5, 6 );
446 pass_along[0] = xspin;
447 pass_along[1] = yspin;
448 pass_along[2] = ce_spin;
449 pass_along[3] = cn_spin;
450 g_signal_connect_swapped ( G_OBJECT(wfp_button), "clicked", G_CALLBACK(georef_layer_dialog_load), pass_along );
452 gtk_widget_show_all ( table );
454 if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) == GTK_RESPONSE_ACCEPT )
458 *vgl = georef_layer_new ();
459 vik_layer_rename ( VIK_LAYER(*vgl), vik_georef_layer_interface.name );
461 (*vgl)->corner.easting = gtk_spin_button_get_value ( GTK_SPIN_BUTTON(ce_spin) );
462 (*vgl)->corner.northing = gtk_spin_button_get_value ( GTK_SPIN_BUTTON(cn_spin) );
463 (*vgl)->mpp_easting = gtk_spin_button_get_value ( GTK_SPIN_BUTTON(xspin) );
464 (*vgl)->mpp_northing = gtk_spin_button_get_value ( GTK_SPIN_BUTTON(yspin) );
465 if ( (!(*vgl)->image) || strcmp( (*vgl)->image, vik_file_entry_get_filename(VIK_FILE_ENTRY(imageentry)) ) != 0 )
467 georef_layer_set_image ( *vgl, vik_file_entry_get_filename(VIK_FILE_ENTRY(imageentry)) );
468 georef_layer_load_image ( *vgl );
471 gtk_widget_destroy ( GTK_WIDGET(dialog) );
474 gtk_widget_destroy ( GTK_WIDGET(dialog) );
478 static void georef_layer_zoom_to_fit ( gpointer vgl_vlp[2] )
480 vik_viewport_set_xmpp ( vik_layers_panel_get_viewport(VIK_LAYERS_PANEL(vgl_vlp[1])), VIK_GEOREF_LAYER(vgl_vlp[0])->mpp_easting );
481 vik_viewport_set_ympp ( vik_layers_panel_get_viewport(VIK_LAYERS_PANEL(vgl_vlp[1])), VIK_GEOREF_LAYER(vgl_vlp[0])->mpp_northing );
482 vik_layers_panel_emit_update ( VIK_LAYERS_PANEL(vgl_vlp[1]) );
485 static void georef_layer_goto_center ( gpointer vgl_vlp[2] )
487 VikGeorefLayer *vgl = VIK_GEOREF_LAYER ( vgl_vlp[0] );
488 VikViewport *vp = vik_layers_panel_get_viewport(VIK_LAYERS_PANEL(vgl_vlp[1]));
492 vik_coord_to_utm ( vik_viewport_get_center ( vp ), &utm );
494 utm.easting = vgl->corner.easting + (vgl->width * vgl->mpp_easting / 2); /* only an approximation */
495 utm.northing = vgl->corner.northing - (vgl->height * vgl->mpp_northing / 2);
497 vik_coord_load_from_utm ( &coord, vik_viewport_get_coord_mode ( vp ), &utm );
498 vik_viewport_set_center_coord ( vp, &coord );
500 vik_layers_panel_emit_update ( VIK_LAYERS_PANEL(vgl_vlp[1]) );
503 static void georef_layer_add_menu_items ( VikGeorefLayer *vgl, GtkMenu *menu, gpointer vlp )
505 static gpointer pass_along[2];
510 item = gtk_menu_item_new();
511 gtk_menu_shell_append ( GTK_MENU_SHELL(menu), item );
512 gtk_widget_show ( item );
514 item = gtk_menu_item_new_with_label ( "Zoom to Fit Map" );
515 g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(georef_layer_zoom_to_fit), pass_along );
516 gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
517 gtk_widget_show ( item );
519 item = gtk_menu_item_new_with_label ( "Goto Map Center" );
520 g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(georef_layer_goto_center), pass_along );
521 gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
522 gtk_widget_show ( item );
524 item = gtk_menu_item_new_with_label ( "Export to World File" );
525 g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(georef_layer_export_params), pass_along );
526 gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
527 gtk_widget_show ( item );
531 static gpointer georef_layer_move_create ( VikWindow *vw, VikViewport *vvp)
536 static gboolean georef_layer_move_release ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp )
538 if (!vgl || vgl->vl.type != VIK_LAYER_GEOREF)
541 if ( vgl->click_x != -1 )
543 vgl->corner.easting += (event->x - vgl->click_x) * vik_viewport_get_xmpp (vvp);
544 vgl->corner.northing -= (event->y - vgl->click_y) * vik_viewport_get_ympp (vvp);
545 vik_layer_emit_update ( VIK_LAYER(vgl) );
548 return FALSE; /* I didn't move anything on this layer! */
551 static gpointer georef_layer_zoom_create ( VikWindow *vw, VikViewport *vvp)
556 static gboolean georef_layer_zoom_press ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp )
558 if (!vgl || vgl->vl.type != VIK_LAYER_GEOREF)
560 if ( event->button == 1 )
562 if ( vgl->mpp_easting < (VIK_VIEWPORT_MAX_ZOOM / 1.05) && vgl->mpp_northing < (VIK_VIEWPORT_MAX_ZOOM / 1.05) )
564 vgl->mpp_easting *= 1.01;
565 vgl->mpp_northing *= 1.01;
570 if ( vgl->mpp_easting > (VIK_VIEWPORT_MIN_ZOOM * 1.05) && vgl->mpp_northing > (VIK_VIEWPORT_MIN_ZOOM * 1.05) )
572 vgl->mpp_easting /= 1.01;
573 vgl->mpp_northing /= 1.01;
576 vik_viewport_set_xmpp ( vvp, vgl->mpp_easting );
577 vik_viewport_set_ympp ( vvp, vgl->mpp_northing );
578 vik_layer_emit_update ( VIK_LAYER(vgl) );
582 static gboolean georef_layer_move_press ( VikGeorefLayer *vgl, GdkEventButton *event, VikViewport *vvp )
584 if (!vgl || vgl->vl.type != VIK_LAYER_GEOREF)
586 vgl->click_x = event->x;
587 vgl->click_y = event->y;