def test_delete_from_history(gui: MainWindow):
gui.print_lines_to_history('line1')
gui.print_lines_to_history('line2')
gui.print_lines_to_history('line3')
gui.print_lines_to_history('line4')
gui.delete_from_history(1)
assert gui._ui.history.toPlainText() == 'line1\nline2\nline3'
gui.delete_from_history(3)
assert gui._ui.history.toPlainText() == ''
with pytest.raises(ValueError):
gui.delete_from_history(123)
class Controller:
"""
Main class of this application. Holds all crucial pieces together.
It represents an observer in the observer design pattern.
"""
def __init__(self):
self._gui = MainWindow(self)
self._command_engine = CommandEngine(self)
self._printer = CanvasPrinter(self._gui.canvas)
self._shapes = ShapesStore(self)
# import CliParser this late to avoid import loop
from app.parsers.cli_parser import CliParser
self._cli_parser = CliParser(self, RgbColorParser())
def add_shapes(self, *shapes: Shape):
for shape in shapes:
self.print_to_history(str(shape))
self._shapes.add_shapes(*shapes)
def move_shapes(self,
move_from: Point,
move_to: Point,
divergence: bool = False) -> Dict[str, List[Shape]]:
return self._shapes.move_shapes(move_from, move_to, divergence)
def replace_shapes_store(self, shapes: List[Shape]):
self._shapes = ShapesStore(self, shapes)
self.update()
def remove_last_shape(self):
self._shapes.remove_last_shape()
def remove_shapes_at(self,
point: Point,
divergence: bool = False) -> Dict[str, List[Shape]]:
return self._shapes.remove_shapes_at(point, divergence)
def preview_shape(self, shape: Shape):
self._shapes.set_preview(shape)
def end_preview(self):
self._shapes.set_preview(None)
def parse_command(self, command_text: str):
command = self._cli_parser.parse_input(command_text)
self.execute_command(command, command_text=command_text)
def execute_command(self,
command: Command,
from_redo: bool = False,
command_text: str = None):
history_line = ' > ' + (command_text or str(command))
self._gui.print_lines_to_history(history_line)
self._command_engine.execute_command(command, from_redo=from_redo)
def remove_last_command(self):
self._command_engine.remove_last_command()
def print_to_history(self, lines: str):
self._gui.print_lines_to_history(lines)
def delete_from_history(self, number_of_lines: int = 1):
self._gui.delete_from_history(number_of_lines)
def shapes_at(self,
point: Point = None,
divergence: bool = False) -> List[Shape]:
return self._shapes.shapes_at(point, divergence)
def print_shapes_to_history(self, point: Point):
for shape in self.shapes_at(point):
self.print_to_history(str(shape))
def print_all_shapes(self, printer: Printer = None) -> List[Shape]:
return self._shapes.print_all(printer or self._printer)
def update(self):
self._printer.update(self)
def undo(self):
self._command_engine.undo()
def redo(self):
self._command_engine.redo()
def enable_undo(self):
self._gui.enable_undo()
def enable_redo(self):
self._gui.enable_redo()
def disable_undo(self):
self._gui.disable_undo()
def disable_redo(self):
self._gui.disable_redo()
def save_dialog(self, path_to_file: str):
self._gui.save_dialog(path_to_file)
def load_dialog(self, path_to_file: str):
self._gui.load_dialog(path_to_file)
def save(self, file: str):
commands = self._command_engine.get_all_commands()
with open(file, 'w+', encoding='utf-8') as f:
[f.write(str(c) + '\n') for c in commands['undos']]
self._gui.set_status('File saved!')
def load(self, file: str):
with open(file, 'r', encoding='utf-8') as f:
# Getting rid of the newline `\n` at the end of every line
commands = [line[:-1] for line in f.readlines()]
for command_text in commands:
command = self._cli_parser.parse_input(command_text)
self.execute_command(command, command_text=command_text)
self._gui.set_status('File loaded!')
def run_app(self):
# Run the whole app
self._gui.show()
def clear_dialog(self) -> bool:
return self._gui.clear_dialog()
def restart(self):
self._shapes.restart()
def quit(self):
self._gui.close()