44 lines
1.7 KiB
Python
44 lines
1.7 KiB
Python
import PySimpleGUI as sg
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"""
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Demo - Drag a rectangle and move
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This demo shows how to use a Graph Element to draw a square and move it with the mouse.
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It's a very simple, single element program. Like many Demo Programs, it started as
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a "Test Harness" that demonstrated a bug that happened with a timeout of 0
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was added to the window.read()
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Original code comes courtesy of user @davesmivers .... Thanks Dave!!
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Copyright 2022 PySimpleGUI
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"""
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GRAPH_SIZE = (400, 400)
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START = (200, 200) # We'll assume X and Y are both this value
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SQ_SIZE = 40 # Both width and height will be this value
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layout = [[sg.Graph(
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canvas_size=GRAPH_SIZE, graph_bottom_left=(0, 0), graph_top_right=GRAPH_SIZE, # Define the graph area
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change_submits=True, # mouse click events
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drag_submits=True, # mouse move events
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background_color='lightblue',
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key="-GRAPH-",
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pad=0)]]
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window = sg.Window("Simple Square Movement", layout, finalize=True, margins=(0,0))
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# draw the square we'll move around
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square = window["-GRAPH-"].draw_rectangle(START, (START[0]+SQ_SIZE, START[1]+SQ_SIZE), fill_color='black')
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while True:
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event, values = window.read()
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if event == sg.WIN_CLOSED:
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break
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print(event, values) if event != sg.TIMEOUT_EVENT else None # our normal debug print, but for this demo, don't spam output with timeouts
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if event == "-GRAPH-": # if there's a "Graph" event, then it's a mouse movement. Move the square
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x, y = values["-GRAPH-"] # get mouse position
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window["-GRAPH-"].relocate_figure(square, x - SQ_SIZE // 2, y + SQ_SIZE // 2) # Move using center of square to mouse pos
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window.close()
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