[gnome-software] Give tiles a meaningful empty state

[Matthias Clasen <matthiasc src gnome org>]

commit 486b698728a693bc02b02e4f96030b862db29a82
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Sep 21 00:25:01 2013 -0400

    Give tiles a meaningful empty state
    
    This will be used to prepopulate grids with empty tiles.

 src/gs-app-tile.c     |   13 +++++++++++--
 src/gs-feature-tile.c |   11 +++++++++--
 src/gs-popular-tile.c |    9 +++++++--
 3 files changed, 27 insertions(+), 6 deletions(-)
---
diff --git a/src/gs-app-tile.c b/src/gs-app-tile.c
index 3defad6..6ba86f6 100644
--- a/src/gs-app-tile.c
+++ b/src/gs-app-tile.c
@@ -100,11 +100,16 @@ gs_app_tile_set_app (GsAppTile *tile, GsApp *app)
        const gchar *summary;
 
        g_return_if_fail (GS_IS_APP_TILE (tile));
-       g_return_if_fail (GS_IS_APP (app));
+       g_return_if_fail (GS_IS_APP (app) || app == NULL);
 
        priv = gs_app_tile_get_instance_private (tile);
 
+       gtk_image_clear (GTK_IMAGE (priv->image));
+       gtk_image_set_pixel_size (GTK_IMAGE (priv->image), 64);
+
        g_clear_object (&priv->app);
+       if (!app)
+               return;
        priv->app = g_object_ref (app);
 
         g_signal_connect (priv->app, "notify::state",
@@ -134,7 +139,11 @@ gs_app_tile_destroy (GtkWidget *widget)
 static void
 button_clicked (GsAppTile *tile)
 {
-       g_signal_emit (tile, signals[SIGNAL_CLICKED], 0);
+       GsAppTilePrivate *priv;
+
+       priv = gs_app_tile_get_instance_private (tile);
+       if (priv->app)
+               g_signal_emit (tile, signals[SIGNAL_CLICKED], 0);
 }
 
 static void
diff --git a/src/gs-feature-tile.c b/src/gs-feature-tile.c
index 90b5b7f..642e8ea 100644
--- a/src/gs-feature-tile.c
+++ b/src/gs-feature-tile.c
@@ -95,11 +95,14 @@ gs_feature_tile_set_app (GsFeatureTile *tile, GsApp *app)
        gchar *data;
 
        g_return_if_fail (GS_IS_FEATURE_TILE (tile));
-       g_return_if_fail (GS_IS_APP (app));
+       g_return_if_fail (GS_IS_APP (app) || app == NULL);
 
        priv = gs_feature_tile_get_instance_private (tile);
 
        g_clear_object (&priv->app);
+       if (!app)
+               return;
+
        priv->app = g_object_ref (app);
 
         g_signal_connect (priv->app, "notify::state",
@@ -148,7 +151,11 @@ gs_feature_tile_destroy (GtkWidget *widget)
 static void
 button_clicked (GsFeatureTile *tile)
 {
-       g_signal_emit (tile, signals[SIGNAL_CLICKED], 0);
+       GsFeatureTilePrivate *priv;
+
+       priv = gs_feature_tile_get_instance_private (tile);
+       if (priv->app)
+               g_signal_emit (tile, signals[SIGNAL_CLICKED], 0);
 }
 
 static void
diff --git a/src/gs-popular-tile.c b/src/gs-popular-tile.c
index 78c0ddf..c272d48 100644
--- a/src/gs-popular-tile.c
+++ b/src/gs-popular-tile.c
@@ -98,11 +98,13 @@ gs_popular_tile_set_app (GsPopularTile *tile, GsApp *app)
        GsPopularTilePrivate *priv;
 
        g_return_if_fail (GS_IS_POPULAR_TILE (tile));
-       g_return_if_fail (GS_IS_APP (app));
+       g_return_if_fail (GS_IS_APP (app) || app == NULL);
 
        priv = gs_popular_tile_get_instance_private (tile);
 
        g_clear_object (&priv->app);
+       if (!app)
+               return;
        priv->app = g_object_ref (app);
 
        g_signal_connect (priv->app, "notify::state",
@@ -130,7 +132,10 @@ gs_popular_tile_destroy (GtkWidget *widget)
 static void
 button_clicked (GsPopularTile *tile)
 {
-       g_signal_emit (tile, signals[SIGNAL_CLICKED], 0);
+       GsPopularTilePrivate *priv;
+       priv = gs_popular_tile_get_instance_private (tile);
+       if (priv->app)
+               g_signal_emit (tile, signals[SIGNAL_CLICKED], 0);
 }
 
 static void