Adding button click example

project0/button_click.py

@@ -0,0 +1,67 @@
+from micropython import const  # NOQA
+import display_driver_framework
+
+_WIDTH = const(480)
+_HEIGHT = const(320)
+
+_BUFFER_SIZE = _WIDTH * _HEIGHT * 3
+import lcd_bus  # NOQA
+
+print("Intializing LCD Bus")
+bus = lcd_bus.SDLBus(flags=0)
+
+print("Creating buffers")
+buf1 = bus.allocate_framebuffer(_BUFFER_SIZE, 0)
+buf2 = bus.allocate_framebuffer(_BUFFER_SIZE, 0)
+
+import lvgl as lv  # NOQA
+
+import sdl_display  # NOQA
+
+print("Initializing LVGL")
+lv.init()
+print("Creating Display")
+display = sdl_display.SDLDisplay(
+    data_bus=bus,
+    display_width=480,
+    display_height=320,
+    frame_buffer1=buf1,
+    frame_buffer2=buf2,
+    color_space=lv.COLOR_FORMAT.RGB888
+)
+print(display)
+print("Initializing display")
+display.init()
+
+import sdl_pointer
+
+print("Creating SDL pointer")
+mouse = sdl_pointer.SDLPointer()
+print(mouse)
+
+print("Starting task handler")
+import task_handler
+th = task_handler.TaskHandler()
+
+print("Activating screen")
+scrn = lv.screen_active()
+print("Setting screen style")
+scrn.set_style_bg_color(lv.color_hex(0x000000), 0)
+
+# Button
+btn = lv.button(scrn)
+btn.set_pos(10, 10)
+btn.set_size(120, 50)
+btn_label = lv.label(btn)
+btn_label.set_text("Button")
+g_btn_count = 0
+
+def btn_event_cb(e: lv.event_t):
+    btn = e.get_target_obj()
+    label = btn.get_child(0)
+    if e.get_code() == lv.EVENT.CLICKED:
+        global g_btn_count 
+        g_btn_count += 1
+        label.set_text(f"Button: {g_btn_count}")
+    
+btn.add_event_cb(btn_event_cb, lv.EVENT.ALL, None)