main : getting item size example

examples/get_item_size_on_startup.py

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+import dearpygui.dearpygui as dpg
+dpg.create_context()
+
+def print_item_sizes(sender):
+    print(f"On {sender} the window size is: {dpg.get_item_rect_size('window')}")
+    print(f"On {sender} the text size is: {dpg.get_item_rect_size('text')}")
+
+with dpg.window(autosize=True, tag='window'):
+    dpg.add_input_text(width=400, height=200, multiline=True, tag='text')
+    print_item_sizes('startup')
+
+dpg.set_frame_callback(1, print_item_sizes)
+dpg.set_frame_callback(2, print_item_sizes)
+dpg.create_viewport(width=800, height=600, title="Get item size on startup")
+dpg.setup_dearpygui()
+dpg.show_viewport()
+dpg.start_dearpygui()
+dpg.destroy_context()
+
+"""
+$ python get_item_size_on_startup.py 
+On startup the window size is: [0, 0]
+On startup the text size is: [0, 0]
+On 1 the window size is: [100, 100]
+On 1 the text size is: [400, 200]
+On 2 the window size is: [416, 235]
+On 2 the text size is: [400, 200]
+"""