#!/usr/bin/env python
# -*- coding: utf-8 -*-

'''采用PySimpleGUI的调色盘程序'''

import numpy as np
import cv2
import PySimpleGUI as sg

# 界面风格
sg.theme('GreenTan') 

slider_r=[  sg.Text('红色分量', size=(10, 1)), 
            sg.Slider(range=(0,255),size=(40,15),resolution=1,change_submits=True,
            orientation='horizontal',key='-SLIDER_R-')]   
slider_g=[  sg.Text('绿色分量', size=(10, 1)), 
            sg.Slider(range=(0,255),size=(40,15),resolution=1,change_submits=True,
            orientation='horizontal',key='-SLIDER_G-')]  
slider_b=[  sg.Text('蓝色分量', size=(10, 1)), 
            sg.Slider(range=(0,255),size=(40,15),resolution=1,change_submits=True,
            orientation='horizontal',key='-SLIDER_B-')]  
image_palette=[sg.Image(key='-IMAGE_PALETTE-',size=(400,400))]

window = sg.Window('调色盘', 
        [slider_r,slider_g,slider_b,[sg.HorizontalSeparator()],image_palette], 
        font=("Helvetica", 15),element_justification="center" )

img = np.zeros((400,400,3), np.uint8)

#事件循环
while True:
    # 读取界面操作
    event, values = window.read()
    # 检测是否需要退出
    if event == sg.WIN_CLOSED:
        break

    r=np.uint8(values['-SLIDER_R-'])
    g=np.uint8(values['-SLIDER_G-'])
    b=np.uint8(values['-SLIDER_B-'])
    img[:] = [b,g,r]

    imgbytes = cv2.imencode(".png", img)[1].tobytes()
    window["-IMAGE_PALETTE-"].update(data=imgbytes)

cv2.waitKey(0)
cv2.destroyAllWindows()
window.close()