Core examples (#11)

* Added core_input_keys example

* Added core_basic_window example

* Added core_input_mouse example

* Added core_input_mouse_wheel example

examples/core/core_basic_window.py

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+"""
+
+raylib [core] example - Basic window
+
+"""
+from raylib.pyray import PyRay
+from raylib.colors import (
+    RAYWHITE,
+    LIGHTGRAY,
+)
+
+
+pyray = PyRay()
+
+
+# Initialization
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 450
+
+pyray.init_window(SCREEN_WIDTH, SCREEN_HEIGHT,
+                  'raylib [core] example - basic window')
+pyray.set_target_fps(60)  # Set our game to run at 60 frames-per-second
+
+
+# Main game loop
+while not pyray.window_should_close():  # Detect window close button or ESC key
+    # Update
+    # TODO: Update your variables here
+
+    # Draw
+    pyray.begin_drawing()
+
+    pyray.clear_background(RAYWHITE)
+    pyray.draw_text(
+        'Congrats! You created your first window!', 190, 200, 20, LIGHTGRAY)
+
+    pyray.end_drawing()
+
+
+# De-Initialization
+pyray.close_window()  # Close window and OpenGL context

examples/core/core_input_keys.py

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+"""
+
+raylib [core] example - Keyboard input
+
+"""
+from raylib.pyray import PyRay
+from raylib.colors import (
+    RAYWHITE,
+    DARKGRAY,
+    MAROON,
+)
+
+
+pyray = PyRay()
+
+
+# Initialization
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 450
+
+pyray.init_window(SCREEN_WIDTH, SCREEN_HEIGHT,
+                  'raylib [core] example - keyboard input')
+ball_position = pyray.Vector2(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2)
+
+pyray.set_target_fps(60)  # Set our game to run at 60 frames-per-second
+
+
+# Main game loop
+while not pyray.window_should_close():  # Detect window close button or ESC key
+    # Update
+    if pyray.is_key_down(pyray.KEY_RIGHT): ball_position.x += 2
+    if pyray.is_key_down(pyray.KEY_LEFT): ball_position.x -= 2
+    if pyray.is_key_down(pyray.KEY_UP): ball_position.y -= 2
+    if pyray.is_key_down(pyray.KEY_DOWN): ball_position.y += 2
+
+    # Draw
+    pyray.begin_drawing()
+
+    pyray.clear_background(RAYWHITE)
+    pyray.draw_text('move the ball with arrow keys', 10, 10, 20, DARKGRAY)
+    pyray.draw_circle_v(ball_position, 50, MAROON)
+
+    pyray.end_drawing()
+
+
+# De-Initialization
+pyray.close_window()  # Close window and OpenGL context

examples/core/core_input_mouse.py

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+"""
+
+raylib [core] example - Mouse input
+
+"""
+from raylib.pyray import PyRay
+from raylib.colors import (
+    RAYWHITE,
+    DARKGRAY,
+    MAROON,
+    DARKBLUE,
+    LIME,
+)
+
+
+pyray = PyRay()
+
+
+# Initialization
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 450
+
+pyray.init_window(SCREEN_WIDTH, SCREEN_HEIGHT,
+                  'raylib [core] example - mouse input')
+
+ball_position = pyray.Vector2(-100, -100)
+ball_color = DARKBLUE
+
+pyray.set_target_fps(60)  # Set our game to run at 60 frames-per-second
+
+
+# Main game loop
+while not pyray.window_should_close():  # Detect window close button or ESC key
+    # Update
+    ball_position = pyray.get_mouse_position()
+
+    if pyray.is_mouse_button_pressed(pyray.MOUSE_LEFT_BUTTON):
+        ball_color = MAROON
+    elif pyray.is_mouse_button_pressed(pyray.MOUSE_MIDDLE_BUTTON):
+        ball_color = LIME
+    elif pyray.is_mouse_button_pressed(pyray.MOUSE_RIGHT_BUTTON):
+        ball_color = DARKBLUE
+
+    # Draw
+    pyray.begin_drawing()
+
+    pyray.clear_background(RAYWHITE)
+    pyray.draw_circle_v(ball_position, 40, ball_color)
+    pyray.draw_text(
+        'move ball with mouse and click mouse button to change color',
+        10, 10, 20, DARKGRAY
+    )
+
+    pyray.end_drawing()
+
+
+# De-Initialization
+pyray.close_window()  # Close window and OpenGL context

examples/core/core_input_mouse_wheel.py

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+"""
+
+raylib [core] example - Mouse wheel input
+
+"""
+from raylib.pyray import PyRay
+from raylib.colors import (
+    RAYWHITE,
+    GRAY,
+    LIGHTGRAY,
+    MAROON,
+)
+
+
+pyray = PyRay()
+
+
+# Initialization
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 450
+
+pyray.init_window(SCREEN_WIDTH, SCREEN_HEIGHT,
+                  'raylib [core] example - input mouse wheel')
+
+box_position_y: int = SCREEN_HEIGHT // 2 - 40
+scroll_speed = 4  # Scrolling speed in pixels
+
+pyray.set_target_fps(60)  # Set our game to run at 60 frames-per-second
+
+
+# Main game loop
+while not pyray.window_should_close():  # Detect window close button or ESC key
+    # Update
+    box_position_y -= (pyray.get_mouse_wheel_move() * scroll_speed)
+
+    # Draw
+    pyray.begin_drawing()
+
+    pyray.clear_background(RAYWHITE)
+
+    pyray.draw_rectangle(
+        SCREEN_WIDTH // 2 - 40, box_position_y, 80, 80, MAROON)
+
+    pyray.draw_text('User mouse wheel to move the cube up and down!',
+                    10, 10, 20, GRAY)
+    pyray.draw_text('Box position Y: {:03d}'.format(box_position_y),
+                    10, 40, 20, LIGHTGRAY)
+
+    pyray.end_drawing()
+
+
+# De-Initialization
+pyray.close_window()  # Close window and OpenGL context