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_input_mouse.py

@@ -0,0 +1,58 @@
+"""
+
+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