From 3d5d5f4e66440a393a790f57aa9be840022da7f8 Mon Sep 17 00:00:00 2001
From: Pierre-Luc Beaudoin <pierre-luc@squidy.info>
Date: Fri, 5 Sep 2008 21:50:37 -0400
Subject: [PATCH] Fix low level zoom

---
 champlain/champlainview.c | 40 ++++++++++++++++++++++++---------------
 champlain/map.c           |  5 +++++
 champlain/tile.c          | 10 +++++-----
 3 files changed, 35 insertions(+), 20 deletions(-)

diff --git a/champlain/champlainview.c b/champlain/champlainview.c
index 27712dd..fbdf400 100644
--- a/champlain/champlainview.c
+++ b/champlain/champlainview.c
@@ -127,25 +127,33 @@ resize_viewport(ChamplainView *champlainView)
   tidy_scrollable_get_adjustments (TIDY_SCROLLABLE (priv->viewport), &hadjust, &vadjust);
   
   //tidy_adjustment_get_values (hadjust, NULL, &lower, &upper, NULL, NULL, NULL);
-  lower = 0;
   if (priv->map->current_level->level < 8)
-    upper = zoom_level_get_width(priv->map->current_level) - priv->viewportSize.width; 
+    {
+      lower = -priv->viewportSize.width / 2;
+      upper = zoom_level_get_width(priv->map->current_level) - priv->viewportSize.width / 2;
+    }
   else
-    upper = G_MAXINT16;
+    {
+      lower = 0;
+      upper = G_MAXINT16;
+    }
   g_object_set (hadjust, "lower", lower, "upper", upper,
                 "step-increment", 1.0, "elastic", TRUE, NULL);
                 
   //tidy_adjustment_get_values (vadjust, NULL, &lower, &upper, NULL, NULL, NULL);
-  lower = 0;
+  
   if (priv->map->current_level->level < 8)
-    upper = zoom_level_get_height(priv->map->current_level) - priv->viewportSize.height; 
+    {
+      lower = -priv->viewportSize.height / 2; 
+      upper = zoom_level_get_height(priv->map->current_level) - priv->viewportSize.height / 2;
+    }
   else
-    upper = G_MAXINT16;
+    {
+      lower = 0;
+      upper = G_MAXINT16;
+    }
   g_object_set (vadjust, "lower", lower, "upper", upper,
                 "step-increment", 1.0, "elastic", TRUE, NULL);
-  
-  g_print("Level: %d\n", priv->map->current_level->level);
-  g_print("Upper: %f\n", upper);
 }
 
 static void 
@@ -413,8 +421,7 @@ viewport_x_changed_cb(GObject *gobject, GParamSpec *arg1, ChamplainView *champla
   
   GdkPoint rect;
   tidy_viewport_get_origin(TIDY_VIEWPORT(priv->viewport), &rect.x, &rect.y, NULL);
-  if (rect.x < 0 || rect.y < 0)
-      return;
+  
   if (rect.x == priv->viewportSize.x &&
       rect.y == priv->viewportSize.y)
       return;
@@ -543,10 +550,13 @@ champlain_view_center_on (ChamplainView *champlainView, gdouble longitude, gdoub
   }
 
   //FIXME: Inform tiles that there is a new anchor
-
-  g_print("Anchor: %d, %d\n", anchor->x, anchor->y);
-  g_print("Center: %f, %f\n", x, y);
-
+  int i;
+  for (i = 0; i < priv->map->current_level->tiles->len; i++)
+    {
+      Tile* tile = g_ptr_array_index(priv->map->current_level->tiles, i);
+      if (!tile->loading)
+        tile_set_position(priv->map, tile);
+    }
 
   tidy_viewport_set_origin(TIDY_VIEWPORT(priv->viewport),
     x - priv->viewportSize.width / 2.0,
diff --git a/champlain/map.c b/champlain/map.c
index 3538cc8..a68e03f 100644
--- a/champlain/map.c
+++ b/champlain/map.c
@@ -69,6 +69,11 @@ map_load_level(Map* map, gint zoom_level)
 void
 map_load_visible_tiles (Map* map, GdkRectangle viewport, gboolean offline)
 {
+  if (viewport.x < 0)
+    viewport.x = 0;
+  if (viewport.y < 0)
+    viewport.y = 0;
+
   gint x_count = ceil((float)viewport.width / map->tile_size) + 1;
   gint y_count = ceil((float)viewport.height / map->tile_size) + 1;
   
diff --git a/champlain/tile.c b/champlain/tile.c
index 44f5acd..bcc4ad9 100644
--- a/champlain/tile.c
+++ b/champlain/tile.c
@@ -34,9 +34,9 @@ typedef struct {
 
 #define CACHE_DIR "champlain"
 static SoupSession * soup_session;
-  
+
 void
-tile_set(Map* map, Tile* tile) 
+tile_set_position(Map* map, Tile* tile) 
 {
   clutter_actor_set_position (tile->actor, 
     (tile->x * tile->size) - map->current_level->anchor.x, 
@@ -58,7 +58,7 @@ create_error_tile(Map* map, Tile* tile)
 {
   tile->actor = clutter_texture_new_from_file("error.svg", NULL);
        
-  tile_set(map, tile);
+  tile_set_position(map, tile);
   
   clutter_container_add (CLUTTER_CONTAINER (map->current_level->group), tile->actor, NULL);
   tile_setup_animation(tile);
@@ -159,7 +159,7 @@ file_loaded_cb (SoupSession *session,
           gdk_pixbuf_get_rowstride (pixbuf),
           3, 0, NULL);
            
-      tile_set(map, tile);
+      tile_set_position(map, tile);
       
       clutter_container_add (CLUTTER_CONTAINER (map->current_level->group), tile->actor, NULL);
       tile_setup_animation(tile);
@@ -198,7 +198,7 @@ tile_load (Map* map, guint zoom_level, guint x, guint y, gboolean offline)
   if (g_file_test (filename, G_FILE_TEST_EXISTS)) 
     {
       tile->actor = clutter_texture_new_from_file(filename, NULL);
-      tile_set(map, tile);
+      tile_set_position(map, tile);
       
       clutter_container_add (CLUTTER_CONTAINER (map->current_level->group), tile->actor, NULL);
       // Do not animate since it is local and fast
-- 
2.39.5