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authorBenjamin Otte <otte@redhat.com>2010-10-05 22:50:13 +0800
committerMatthew Barnes <mbarnes@redhat.com>2010-10-30 01:50:03 +0800
commitedb4b36b8d1914684bacca24bcbfa0e3f6cc07a1 (patch)
tree4a58c009107edcf138175b82f5e3f2c347b50d58 /widgets/misc
parenteda95a9c337e6a14d562a73e455530c3d26c6080 (diff)
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e-map: Make center_at() function take longitude/latitude
Way easier than to try to get the coordinates right. Includes refactoring to introduce e_map_world_to_render_surface() that computes coordinates on the background surface to make this stuff easier.
Diffstat (limited to 'widgets/misc')
-rw-r--r--widgets/misc/e-map.c50
1 files changed, 29 insertions, 21 deletions
diff --git a/widgets/misc/e-map.c b/widgets/misc/e-map.c
index 3fde242b8e..f1d065deee 100644
--- a/widgets/misc/e-map.c
+++ b/widgets/misc/e-map.c
@@ -97,7 +97,7 @@ static void e_map_set_scroll_adjustments (GtkWidget *widget, GtkAdjustment *hadj
static void update_render_surface (EMap *map, gboolean render_overlays);
static void set_scroll_area (EMap *view, int width, int height);
-static void center_at (EMap *map, gint x, gint y);
+static void center_at (EMap *map, double longitude, double latitude);
static void smooth_center_at (EMap *map, gint x, gint y);
static void scroll_to (EMap *view, gint x, gint y);
static void zoom_do (EMap *map);
@@ -580,24 +580,33 @@ e_map_window_to_world (EMap *map, gdouble win_x, gdouble win_y, gdouble *world_l
((gdouble) height / 2.0) * 90.0;
}
-void
-e_map_world_to_window (EMap *map, gdouble world_longitude, gdouble world_latitude, gdouble *win_x, gdouble *win_y)
+static void
+e_map_world_to_render_surface (EMap *map, gdouble world_longitude, gdouble world_latitude, gdouble *win_x, gdouble *win_y)
{
- EMapPrivate *priv;
gint width, height;
- g_return_if_fail (map);
+ width = E_MAP_GET_WIDTH (map);
+ height = E_MAP_GET_HEIGHT (map);
- priv = map->priv;
- g_return_if_fail (priv->map_render_surface);
+ *win_x = (width / 2.0 + (width / 2.0) * world_longitude / 180.0);
+ *win_y = (height / 2.0 - (height / 2.0) * world_latitude / 90.0);
+}
+
+void
+e_map_world_to_window (EMap *map, gdouble world_longitude, gdouble world_latitude, gdouble *win_x, gdouble *win_y)
+{
+ EMapPrivate *priv;
+
+ g_return_if_fail (E_IS_MAP (map));
+ g_return_if_fail (gtk_widget_get_realized (GTK_WIDGET (map)));
g_return_if_fail (world_longitude >= -180.0 && world_longitude <= 180.0);
g_return_if_fail (world_latitude >= -90.0 && world_latitude <= 90.0);
- width = E_MAP_GET_WIDTH (map);
- height = E_MAP_GET_HEIGHT (map);
+ priv = map->priv;
- *win_x = (width / 2.0 + (width / 2.0) * world_longitude / 180.0) - priv->xofs;
- *win_y = (height / 2.0 - (height / 2.0) * world_latitude / 90.0) - priv->yofs;
+ e_map_world_to_render_surface (map, world_longitude, world_latitude, win_x, win_y);
+ *win_x -= priv->xofs;
+ *win_y -= priv->yofs;
#ifdef DEBUG
printf ("Map size: (%d, %d)\nCoords: (%.1f, %.1f) -> (%.1f, %.1f)\n---\n", width, height, world_longitude, world_latitude, *win_x, *win_y);
@@ -985,11 +994,14 @@ repaint_point (EMap *map, EMapPoint *point)
}
static void
-center_at (EMap *map, gint x, gint y)
+center_at (EMap *map, double longitude, double latitude)
{
EMapPrivate *priv;
GtkAllocation allocation;
gint pb_width, pb_height;
+ double x, y;
+
+ e_map_world_to_render_surface (map, longitude, latitude, &x, &y);
priv = map->priv;
@@ -998,13 +1010,13 @@ center_at (EMap *map, gint x, gint y)
gtk_widget_get_allocation (GTK_WIDGET (map), &allocation);
- x = CLAMP (x - (allocation.width / 2), 0, pb_width - allocation.width);
- y = CLAMP (y - (allocation.height / 2), 0, pb_height - allocation.height);
+ priv->xofs = CLAMP (x - (allocation.width / 2), 0, pb_width - allocation.width);
+ priv->yofs = CLAMP (y - (allocation.height / 2), 0, pb_height - allocation.height);
- priv->xofs = x;
- priv->yofs = y;
gtk_adjustment_set_value (priv->hadj, priv->xofs);
gtk_adjustment_set_value (priv->vadj, priv->yofs);
+
+ gtk_widget_queue_draw (GTK_WIDGET (map));
}
static void
@@ -1377,7 +1389,6 @@ zoom_out (EMap *map)
{
EMapPrivate *priv;
gdouble longitude, latitude;
- gdouble x, y;
priv = map->priv;
@@ -1387,10 +1398,7 @@ zoom_out (EMap *map)
priv->zoom_state = E_MAP_ZOOMED_OUT;
update_render_surface (map, TRUE);
- e_map_world_to_window (map, longitude, latitude, &x, &y);
- center_at (map, x + priv->xofs, y + priv->yofs);
-
- gtk_widget_queue_draw (GTK_WIDGET (map));
+ center_at (map, longitude, latitude);
}
static void