class DialogComponent:
"""
A graphical Pygame component that represents a dialog tree
Display this component to the screen by blitting its publicly accessible surface. Make sure to call redraw() so that
the graphics are updated. Call update(ms) to have it respond to time passing.
"""
def __init__(self, surface: Surface, dialog_font: Font, choice_font: Font,
images: Dict[str, Surface], animations: Dict[str,
List[Surface]],
sound_player: SoundPlayer, dialog_graph: DialogGraph,
picture_size: Vec2, select_blip_sound_id: str):
self._validate_inputs(dialog_graph, images, sound_player)
self.surface = surface
self._sound_player = sound_player
self._dialog_graph = dialog_graph
self._current_dialog_node = self._dialog_graph.current_node()
background_id = self._dialog_graph.background_image_id
background = images[background_id] if background_id else None
self._ui = Ui(surface=surface,
picture_size=picture_size,
dialog_node=self._current_dialog_node,
dialog_font=dialog_font,
choice_font=choice_font,
images=images,
animations=animations,
sound_player=sound_player,
background=background,
select_blip_sound_id=select_blip_sound_id)
self._play_dialog_sound()
@staticmethod
def _validate_inputs(dialog_graph: DialogGraph, images: Dict[str, Surface],
sound_player: SoundPlayer):
for node in dialog_graph.nodes():
if node.graphics.image_ids:
for image_id in node.graphics.image_ids:
if image_id not in images:
raise ValueError(
f"Invalid config! Graph node '{node.node_id}' refers to missing image: '{image_id}'"
)
if node.sound_id:
if not sound_player.has_sound(node.sound_id):
raise ValueError(
f"Invalid config! Graph node '{node.node_id}' refers to missing sound: '{node.sound_id}"
)
background_id = dialog_graph.background_image_id
if background_id and background_id not in images:
raise ValueError(
f"Invalid config! Graph refers to missing background image: '{background_id}'"
)
def update(self, elapsed_time: Millis):
self._ui.update(elapsed_time)
self._sound_player.update(elapsed_time)
def skip_text(self):
self._ui.skip_text()
def move_choice_selection(self, delta: int):
self._ui.move_choice_highlight(delta)
def select_choice_at_position(self, ui_coordinates: Vec2):
chosen_index = self._ui.choice_button_at_position(ui_coordinates)
if chosen_index is not None:
self._ui.set_highlighted_choice(chosen_index)
def commit_selected_choice(self):
chosen_index = self._ui.highlighted_choice()
if chosen_index is not None:
self._commit_choice(chosen_index)
def commit_choice_at_position(self, ui_coordinates: Vec2):
chosen_index = self._ui.choice_button_at_position(ui_coordinates)
if chosen_index is not None:
self._commit_choice(chosen_index)
def _commit_choice(self, chosen_index: int):
self._dialog_graph.make_choice(chosen_index)
self._current_dialog_node = self._dialog_graph.current_node()
self._play_dialog_sound()
self._ui.set_dialog(self._current_dialog_node)
def current_node_id(self) -> str:
return self._current_dialog_node.node_id
def _play_dialog_sound(self):
self._sound_player.stop_all_playing_sounds()
if self._current_dialog_node.sound_id:
self._sound_player.play(self._current_dialog_node.sound_id)
def redraw(self):
self._ui.redraw()
