Message log and be viewed and scrolled

components/game/message_log.py

@@ -1,3 +1,4 @@
 class MessageLogComponent():
     def __init__(self):
-        self.messages = []
+        self.messages = []
+        self.offset = 0

processors/event.py

@@ -38,6 +38,7 @@ def process(self):
                 _pop_popup_menu = event.get('pop_popup_menu')
                 _popup = event.get('popup')
                 _save_game = event.get('save_game')
+                _scroll = event.get('scroll')
                 _toggle_debug = event.get('toggle_debug')
                 _view_log = event.get('view_log')
 
@@ -73,6 +74,9 @@ def process(self):
                     self.world.component_for_entity(1, MessageLogComponent).messages.append({'game_saved': True})
                     save_game(self.world._next_entity_id, self.world._components, self.world._entities)
 
+                if _scroll:
+                    self.world.component_for_entity(1, MessageLogComponent).offset += _scroll
+
                 if _toggle_debug:
                     if self.world.has_component(1, DebugComponent):
                         self.world.remove_component(1, DebugComponent)

processors/input.py

@@ -78,9 +78,17 @@ def process(self):
             if key_char == 'm':
                 events.append({'view_log': True})
 
-        elif game_state_component.state == 'GameOver' or game_state_component.state == 'VictoryScreen' or game_state_component.state == 'ViewLog':
+        elif game_state_component.state == 'ViewLog':
+            if key.scancode == libtcod.event.SCANCODE_UP or key_char == 'k' or key.scancode == libtcod.event.SCANCODE_KP_8:
+                events.append({'scroll': +1})
+            elif key.scancode == libtcod.event.SCANCODE_DOWN or key_char == 'j' or key.scancode == libtcod.event.SCANCODE_KP_2:
+                events.append({'scroll': -1})
+            elif key.scancode == libtcod.event.SCANCODE_ESCAPE:
+                events.append({'exit': True})
+
+        elif game_state_component.state == 'GameOver' or game_state_component.state == 'VictoryScreen':
             if key.scancode == libtcod.event.SCANCODE_ESCAPE:
-                    events.append({'exit': True})
+                events.append({'exit': True})
 
         ### INPUTS THAT ARE READ ONLY ON THE PLAYERS TURN
         for ent, (actor, eng, player) in self.world.get_components(ActorComponent, EnergyComponent, PlayerComponent):

processors/render.py

@@ -5,6 +5,7 @@
 from components.game.debug import DebugComponent
 from components.game.redraw import RedrawComponent
 from components.game.state import StateComponent
+from components.game.view_log import ViewLogComponent
 from processors.sub.entities import render_entities
 from processors.sub.message_log import render_message_log
 from processors.sub.popup_menu import render_popup_menu

processors/sub/message_log.py

@@ -4,11 +4,27 @@
 from components.game.message_log import MessageLogComponent
 
 def render_message_log(console_bundle, world):
-    message_log = world.component_for_entity(1, MessageLogComponent).messages
+    message_log_component = world.component_for_entity(1, MessageLogComponent)
     console, x, y, w, h = console_bundle
-
+
+    offset = None
+    messages = message_log_component.messages
+
+    max_offset = len(messages) - h
+
+    if message_log_component.offset >= max_offset:
+        message_log_component.offset = max_offset
+        offset = -max_offset
+    elif message_log_component.offset <= 0:
+        message_log_component.offset = 0
+        offset = None
+    else:
+        offset = -message_log_component.offset
+
+
     dy = h - 1
-    for message in reversed(message_log):
+    offset_messages = messages[:offset]
+    for message in reversed(offset_messages):
         _ai_awake = message.get('ai_awake')
         _combat = message.get('combat')
         _consume = message.get('consume')