draft tutorial revisions

docs/cookbook/grid/grid_cell_highlighting_animated.py

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+"""McRogueFace - Cell Highlighting (Targeting) (animated)
+
+Documentation: https://mcrogueface.github.io/cookbook/grid_cell_highlighting
+Repository: https://github.com/jmccardle/McRogueFace/blob/master/docs/cookbook/grid/grid_cell_highlighting_animated.py
+
+This code is extracted from the McRogueFace documentation and can be
+run directly with: ./mcrogueface path/to/this/file.py
+"""
+
+class TargetingSystem:
+    """Handle ability targeting with visual feedback."""
+
+    def __init__(self, grid, player):
+        self.grid = grid
+        self.player = player
+        self.highlights = HighlightManager(grid)
+        self.current_ability = None
+        self.valid_targets = set()
+
+    def start_targeting(self, ability):
+        """Begin targeting for an ability."""
+        self.current_ability = ability
+        px, py = self.player.pos
+
+        # Get valid targets based on ability
+        if ability.target_type == 'self':
+            self.valid_targets = {(px, py)}
+        elif ability.target_type == 'adjacent':
+            self.valid_targets = get_adjacent(px, py)
+        elif ability.target_type == 'ranged':
+            self.valid_targets = get_radius_range(px, py, ability.range)
+        elif ability.target_type == 'line':
+            self.valid_targets = get_line_range(px, py, ability.range)
+
+        # Filter to visible tiles only
+        self.valid_targets = {
+            (x, y) for x, y in self.valid_targets
+            if grid.is_in_fov(x, y)
+        }
+
+        # Show valid targets
+        self.highlights.add('attack', self.valid_targets)
+
+    def update_hover(self, x, y):
+        """Update when cursor moves."""
+        if not self.current_ability:
+            return
+
+        # Clear previous AoE preview
+        self.highlights.remove('danger')
+
+        if (x, y) in self.valid_targets:
+            # Valid target - highlight it
+            self.highlights.add('select', [(x, y)])
+
+            # Show AoE if applicable
+            if self.current_ability.aoe_radius > 0:
+                aoe = get_radius_range(x, y, self.current_ability.aoe_radius, True)
+                self.highlights.add('danger', aoe)
+        else:
+            self.highlights.remove('select')
+
+    def confirm_target(self, x, y):
+        """Confirm target selection."""
+        if (x, y) in self.valid_targets:
+            self.cancel_targeting()
+            return (x, y)
+        return None
+
+    def cancel_targeting(self):
+        """Cancel targeting mode."""
+        self.current_ability = None
+        self.valid_targets = set()
+        self.highlights.clear()