Issue pythonarcade#126, work on decorator support

arcade/examples/decorator_drawing_with_loops.py

@@ -0,0 +1,108 @@
+"""
+Example "Arcade" library code.
+
+This example shows how to use functions and loops to draw a scene.
+It does not assume that the programmer knows how to use classes yet.
+
+If Python and Arcade are installed, this example can be run from the command line with:
+python -m arcade.examples.drawing_with_loops
+"""
+
+# Library imports
+import arcade
+import random
+
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 600
+
+
+
+def draw_background():
+    """
+    This function draws the background. Specifically, the sky and ground.
+    """
+    # Draw the sky in the top two-thirds
+    arcade.draw_rectangle_filled(SCREEN_WIDTH / 2, SCREEN_HEIGHT * 2 / 3,
+                                 SCREEN_WIDTH - 1, SCREEN_HEIGHT * 2 / 3,
+                                 arcade.color.SKY_BLUE)
+
+    # Draw the ground in the bottom third
+    arcade.draw_rectangle_filled(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 6,
+                                 SCREEN_WIDTH - 1, SCREEN_HEIGHT / 3,
+                                 arcade.color.DARK_SPRING_GREEN)
+
+
+def draw_bird(x, y):
+    """
+    Draw a bird using a couple arcs.
+    """
+    arcade.draw_arc_outline(x, y, 20, 20, arcade.color.BLACK, 0, 90)
+    arcade.draw_arc_outline(x + 40, y, 20, 20, arcade.color.BLACK, 90, 180)
+
+
+def draw_pine_tree(center_x, center_y):
+    """
+    This function draws a pine tree at the specified location.
+
+    Args:
+      :center_x: x position of the tree center.
+      :center_y: y position of the tree trunk center.
+    """
+    # Draw the trunkcenter_x
+    arcade.draw_rectangle_filled(center_x, center_y, 20, 40, arcade.color.DARK_BROWN)
+
+    tree_bottom_y = center_y + 20
+
+    # Draw the triangle on top of the trunk
+    point_list = ((center_x - 40, tree_bottom_y),
+                  (center_x, tree_bottom_y + 100),
+                  (center_x + 40, tree_bottom_y))
+
+    arcade.draw_polygon_filled(point_list, arcade.color.DARK_GREEN)
+
+def draw_birds():
+    # Loop to draw ten birds in random locations.
+    for bird in draw_birds.bird_list:
+
+        # Draw the bird.
+        draw_bird(bird[0], bird[1])
+
+draw_birds.bird_list = []
+
+
+def draw_trees():
+    # Draw the top row of trees
+    for x in range(45, SCREEN_WIDTH, 90):
+        draw_pine_tree(x, SCREEN_HEIGHT / 3)
+
+    # Draw the bottom row of trees
+    for x in range(65, SCREEN_WIDTH, 90):
+        draw_pine_tree(x, (SCREEN_HEIGHT / 3) - 120)
+
+
+@arcade.decorator.init
+def create_birds(window):
+    for bird_count in range(10):
+        x = random.randrange(SCREEN_WIDTH)
+        y = random.randrange(SCREEN_HEIGHT / 2, SCREEN_HEIGHT)
+        draw_birds.bird_list.append([x,y])
+
+@arcade.decorator.animate
+def animate_birds(delta_time):
+    for bird in draw_birds.bird_list:
+        bird[0] += 0.3
+        if bird[0] > SCREEN_WIDTH + 20:
+            bird[0] = -20
+
+@arcade.decorator.draw
+def draw():
+
+    # Call our drawing functions.
+    draw_background()
+    draw_birds()
+    draw_trees()
+
+
+if __name__ == "__main__":
+    arcade.decorator.run(SCREEN_WIDTH, SCREEN_HEIGHT, title="Drawing With Loops")
+

arcade/examples/decorator_test.py

@@ -0,0 +1,47 @@
+import arcade
+
+
+class Ball:
+    def __init__(self, radius=20, velocity=70, initial_x=20):
+        self.x_position = initial_x
+        self.velocity = velocity
+        self.radius = radius
+
+
+@arcade.decorator.init
+def setup_my_game(window):
+    window.ball: Ball = Ball()
+
+
+@arcade.decorator.animate
+def move_ball(window, delta_time):
+    window.ball.x_position += window.ball.velocity * delta_time
+
+    # Did the ball hit the right side of the screen while moving right?
+    if window.ball.x_position > window.width - window.ball.radius and window.ball.velocity > 0:
+        window.ball.velocity *= -1
+
+    # Did the ball hit the left side of the screen while moving left?
+    if window.ball.x_position < window.ball.radius and window.ball.velocity < 0:
+        window.ball.velocity *= -1
+
+
+@arcade.decorator.draw
+def draw_the_ball(window):
+    arcade.draw_circle_filled(window.ball.x_position, window.height // 2, window.ball.radius, arcade.color.GREEN)
+
+
+@arcade.decorator.draw
+def draw_some_text(window):
+    arcade.draw_text("This is some text.", 10, window.height // 2, arcade.color.BLACK, 20)
+
+
+
+@arcade.decorator.key_press
+def press_space(key, key_modifiers):
+    if key == arcade.key.SPACE:
+        print("You pressed the space bar.")
+
+
+if __name__ == "__main__":
+    arcade.decorator.run(700, 600, background_color=arcade.color.MAHOGANY)