[gnome-sudoku] Lightly shade the current row, column and block

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 08cc18a54e087f7b2a30964376f84b5547ccc4c6
Author: Parin Porecha <parinporecha gmail com>
Date:   Tue Jul 1 19:58:07 2014 +0200

    Lightly shade the current row, column and block
    
    a.k.a. Highlighter feature
    For the light shading to work, fixed cell color has been reverted back
    to the dark one it was before commit 5222b5c
    
    https://bugzilla.gnome.org/show_bug.cgi?id=731223

 src/sudoku-view.vala |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)
---
diff --git a/src/sudoku-view.vala b/src/sudoku-view.vala
index a3cc34a..bd26c9f 100644
--- a/src/sudoku-view.vala
+++ b/src/sudoku-view.vala
@@ -441,8 +441,9 @@ public class SudokuView : Gtk.AspectFrame
     private Gtk.EventBox box;
     private Gtk.Grid grid;
 
-    public const RGBA fixed_cell_color = {0.93, 0.93, 0.93, 0};
+    public const RGBA fixed_cell_color = {0.8, 0.8, 0.8, 0};
     public const RGBA free_cell_color = {1.0, 1.0, 1.0, 1.0};
+    public const RGBA highlight_color = {0.93, 0.93, 0.93, 0};
 
     private int _selected_x = 0;
     public int selected_x
@@ -528,6 +529,17 @@ public class SudokuView : Gtk.AspectFrame
                         this.selected_x = cell_col;
                         this.selected_y = cell_row;
                         cell_focus_in_event(cell_row, cell_col);
+
+                        reset_cell_background_colors ();
+                        set_row_background_color (cell_row, highlight_color);
+                        set_col_background_color (cell_col, highlight_color);
+
+                        var block_row = cell.row / game.board.block_rows;
+                        var block_col = cell.col / game.board.block_cols;
+                        set_block_background_color (block_row, block_col, highlight_color);
+
+                        queue_draw ();
+
                         return false;
                     });