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[andy/viking.git] / src / viklayer.c

diff --git a/src/viklayer.c b/src/viklayer.c
index 1cd70cbe12a1ed1f1f129f5f60e6189a60f68688..880c7394553c5b7140a2ee2e1fa759b1c2683249 100644 (file)
--- a/src/viklayer.c
+++ b/src/viklayer.c
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2005, Alex Foobarian <foobarian@gmail.com>
  * Copyright (C) 2003-2007, Evan Battaglia <gtoevan@gmx.net>
+ * Copyright (C) 2013, Rob Norris <rw_norris@hotmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -202,7 +203,7 @@ const gchar *vik_layer_get_name ( VikLayer *l )
   return l->name;
 }
 
-VikLayer *vik_layer_create ( VikLayerTypeEnum type, gpointer vp, GtkWindow *w, gboolean interactive )
+VikLayer *vik_layer_create ( VikLayerTypeEnum type, VikViewport *vp, gboolean interactive )
 {
   VikLayer *new_layer = NULL;
   g_assert ( type < VIK_LAYER_NUM_TYPES );
@@ -227,18 +228,18 @@ VikLayer *vik_layer_create ( VikLayerTypeEnum type, gpointer vp, GtkWindow *w, g
 }
 
 /* returns TRUE if OK was pressed */
-gboolean vik_layer_properties ( VikLayer *layer, gpointer vp )
+gboolean vik_layer_properties ( VikLayer *layer, VikViewport *vp )
 {
   if ( vik_layer_interfaces[layer->type]->properties )
     return vik_layer_interfaces[layer->type]->properties ( layer, vp );
   return vik_layer_properties_factory ( layer, vp );
 }
 
-void vik_layer_draw ( VikLayer *l, gpointer data )
+void vik_layer_draw ( VikLayer *l, VikViewport *vp )
 {
   if ( l->visible )
     if ( vik_layer_interfaces[l->type]->draw )
-      vik_layer_interfaces[l->type]->draw ( l, data );
+      vik_layer_interfaces[l->type]->draw ( l, vp );
 }
 
 void vik_layer_change_coord_mode ( VikLayer *l, VikCoordMode mode )
@@ -248,7 +249,7 @@ void vik_layer_change_coord_mode ( VikLayer *l, VikCoordMode mode )
 }
 
 typedef struct {
-  gint layer_type;
+  VikLayerTypeEnum layer_type;
   gint len;
   guint8 data[0];
 } header_t;
@@ -296,10 +297,16 @@ void vik_layer_marshall_params ( VikLayer *vl, guint8 **data, gint *datalen )
       d = get_param(vl, i, FALSE);
       switch ( params[i].type )
       {
-      case VIK_LAYER_PARAM_STRING: 
-       vlm_append(d.s, strlen(d.s));
-       break;
-
+      case VIK_LAYER_PARAM_STRING:
+        // Remember need braces as these are macro calls, not single statement functions!
+        if ( d.s ) {
+          vlm_append(d.s, strlen(d.s));
+        }
+        else {
+          // Need to insert empty string otherwise the unmarshall will get confused
+          vlm_append("", 0);
+        }
+        break;
       /* print out the string list in the array */
       case VIK_LAYER_PARAM_STRING_LIST: {
         GList *list = d.sl;
@@ -525,7 +532,8 @@ static gboolean vik_layer_properties_factory ( VikLayer *vl, VikViewport *vp )
                                            vl, 
                                            vp,
                                            (gpointer) vik_layer_interfaces[vl->type]->get_param, 
-                                           vl) ) {
+                                           vl,
+                                           (gpointer) vik_layer_interfaces[vl->type]->change_param ) ) {
     case 0:
     case 3:
       return FALSE;
@@ -624,6 +632,8 @@ VikLayerTypedParamData *vik_layer_data_typed_param_copy_from_string ( VikLayerPa
  */
 void vik_layer_set_defaults ( VikLayer *vl, VikViewport *vvp )
 {
+  // Sneaky initialize of the viewport value here
+  vl->vvp = vvp;
   VikLayerInterface *vli = vik_layer_get_interface ( vl->type );
   const gchar *layer_name = vli->fixed_layer_name;
   VikLayerParamData data;
@@ -636,7 +646,7 @@ void vik_layer_set_defaults ( VikLayer *vl, VikViewport *vvp )
       // only DEM files uses this currently
       if ( vli->params[i].type != VIK_LAYER_PARAM_STRING_LIST ) {
         data = a_layer_defaults_get ( layer_name, vli->params[i].name, vli->params[i].type );
-        vik_layer_set_param ( vl, i, data, vvp, FALSE );
+        vik_layer_set_param ( vl, i, data, vvp, TRUE ); // Possibly come from a file
       }
     }
   }