#coding=utf-8
'''
    鼠标拖拽画图
'''
import numpy as np
import cv2
cap = cv2.VideoCapture(0)
cap.set(3,320)
cap.set(4,240)


drawing = False
mode = True
ix,iy = -1,-1

def draw_circle(event,x,y,flags,param):
    global ix,iy,drawing,mode
    if event == cv2.EVENT_LBUTTONDOWN:
        drawing = True
        ix,iy = x,y
    elif event == cv2.EVENT_MOUSEMOVE and flags == cv2.EVENT_FLAG_LBUTTON:
        if drawing == True:
            if mode == True:
                cv2.rectangle(img,(ix,iy),(x,y),(0,255,0),-1)
        else:
            cv2.circle(img,(x,y),3,(0,0,255),-1)
    elif event == cv2.EVENT_LBUTTONUP:
        drawing == False

img = np.zeros((512,512,3),np.uint8)
cv2.namedWindow('image')
cv2.setMouseCallback('image',draw_circle)

while(True):
    cv2.imshow('image',img)
    k = cv2.waitKey(1) 
    if k == ord('m'):
        mode = not mode
    elif k == ord('q'):
        break
    elif k == 27:
        break




# ------------视频双击未完成------
# def draw_circle(event,x,y,flags,param):
#     if event == cv2.EVENT_LBUTTONDBLCLK:
#         print(x,y)
#         cv2.circle(img,(x,y),100,(255,0,0),-1)




# while(cap.isOpened()):
#     ret,img = cap.read()
#     cv2.namedWindow('image')
#     cv2.setMouseCallback('image',draw_circle)
#     if ret == True:
#         cv2.imshow('image',img)
#         if cv2.waitKey(1) & 0xFF == ord('q'):
#             break
#     else:
#         break
# cap.release()
# out.release()
# cv2.destroyAllWindows()
