[gnome-software: 8/12] gs-feature-tile: Recalculate background colour when style changes

[Phaedrus Leeds <mwleeds src gnome org>]

commit 72af751beb14998d206b9c5c937ab4f2b5d4724c
Author: Philip Withnall <pwithnall endlessos org>
Date:   Tue Feb 23 15:28:33 2021 +0000

    gs-feature-tile: Recalculate background colour when style changes
    
    This will happen if the user changes the desktop theme while a feature
    tile is visible. That’s expected to be rare, but possible. More
    typically, this will happen when a developer is testing gnome-software
    with `GTK_DEBUG=interactive` and they toggle dark mode on/off. Useful
    for testing.
    
    Signed-off-by: Philip Withnall <pwithnall endlessos org>
    
    Helps: #1148

 src/gs-feature-tile.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/src/gs-feature-tile.c b/src/gs-feature-tile.c
index b473ceb35..8c137c266 100644
--- a/src/gs-feature-tile.c
+++ b/src/gs-feature-tile.c
@@ -388,6 +388,19 @@ gs_feature_tile_direction_changed (GtkWidget *widget, GtkTextDirection previous_
        gs_feature_tile_refresh (GS_APP_TILE (tile));
 }
 
+static void
+gs_feature_tile_style_updated (GtkWidget *widget)
+{
+       GsFeatureTile *tile = GS_FEATURE_TILE (widget);
+
+       /* Clear the key colours cache, as the tile background colour will
+        * potentially need recalculating if the widget’s foreground colour has
+        * changed. */
+       tile->key_colors_cache = NULL;
+
+       gs_feature_tile_refresh (GS_APP_TILE (tile));
+}
+
 static void
 gs_feature_tile_size_allocate (GtkWidget     *widget,
                                GtkAllocation *allocation)
@@ -424,6 +437,7 @@ gs_feature_tile_class_init (GsFeatureTileClass *klass)
        object_class->dispose = gs_feature_tile_dispose;
 
        widget_class->direction_changed = gs_feature_tile_direction_changed;
+       widget_class->style_updated = gs_feature_tile_style_updated;
        widget_class->size_allocate = gs_feature_tile_size_allocate;
 
        app_tile_class->refresh = gs_feature_tile_refresh;