Add a hint mode which shows the summands for the current cell

1 files changed, 34 insertions, 0 deletions

diff --git a/PascalTriangle.activity/pascaltriangle.py b/PascalTriangle.activity/pascaltriangle.py
index 4edb708..68513c5 100755
--- a/PascalTriangle.activity/pascaltriangle.py
+++ b/PascalTriangle.activity/pascaltriangle.py
@@ -19,6 +19,7 @@
 from sugar3.activity import activity, widgets
 from sugar3.graphics.toolbarbox import ToolbarBox
 from sugar3.graphics.toolbutton import ToolButton
+from sugar3.graphics.toggletoolbutton import ToggleToolButton
 import math, random
 from gi.repository import Gtk, Gdk
 import cairo
@@ -42,6 +43,10 @@ class PascalTriangleActivity(activity.Activity):
         new_game_button.show()
         activity_toolbar.insert(new_game_button, 0)
 
+        hint_button = HintButton(self)
+        hint_button.show()
+        activity_toolbar.insert(hint_button, 1)
+
         stop_button = widgets.StopButton(self)
         stop_button.show()
         activity_toolbar.insert(stop_button, -1)
@@ -62,6 +67,9 @@ class PascalTriangleActivity(activity.Activity):
         drawing_area.show()
         self._drawing_area = drawing_area
 
+        # Start with hints off.
+        self._show_hints = False
+
         # Start a new game.
         self._start_game()
 
@@ -265,6 +273,10 @@ class PascalTriangleActivity(activity.Activity):
     def _get_cell_background(self, row_index, column_index):
         if (row_index, column_index) == self._current_cell:
             return cairo.SolidPattern(0.0, 0.7, 0.0) # green
+        elif self._show_hints and row_index == self._current_cell[0] - 1 and \
+             (column_index == self._current_cell[1] - 1 or \
+              column_index == self._current_cell[1]):
+            return cairo.SolidPattern(0.5, 0.5, 0.0) # yellow
         return cairo.SolidPattern(1.0, 1.0, 1.0) # white
 
 
@@ -343,6 +355,16 @@ class PascalTriangleActivity(activity.Activity):
                 self.close()
 
 
+    def get_show_hints(self):
+        return self._show_hints
+
+    def set_show_hints(self, val):
+        self._show_hints = val
+        self._drawing_area.queue_draw()
+
+    show_hints = property(get_show_hints, set_show_hints)
+
+
 class NewGameButton(ToolButton):
     def __init__(self, activity, **kwargs):
         ToolButton.__init__(self, 'add', **kwargs)
@@ -352,3 +374,15 @@ class NewGameButton(ToolButton):
 
     def __new_game_button_clicked_cb(self, button, activity):
         activity._start_game()
+
+
+class HintButton(ToggleToolButton):
+    def __init__(self, activity, **kwargs):
+        ToggleToolButton.__init__(self, 'toolbar-help', **kwargs)
+        #self.props.tooltip = 'Show Hints'
+        self.set_tooltip('Show Hints')
+        self.props.accelerator = '<Ctrl>H'
+        self.connect('clicked', self.__hint_button_clicked_cb, activity)
+
+    def __hint_button_clicked_cb(self, button, activity):
+        activity.show_hints = self.get_active()