window.py

import cv2
import numpy as np
import random


class Window:

    def __init__(self):
        self.windowName = str(random.random())
        cv2.namedWindow(self.windowName)
        cv2.setMouseCallback(self.windowName, self.mousecallback)
        self.xoff = 0
        self.xinit = 0
        self.yoff = 0
        self.yinit = 0
        self.dragging = False
        self.placing = False

    def showImage(self, image):
        cv2.imshow(self.windowName, image)

    def destroy(self):
        cv2.destroyWindow(self.windowName)

    def mousecallback(self,event, x,y, flags, params):
    	if self.placing:
	    	if event == cv2.EVENT_LBUTTONDOWN:
	    		self.dragging = True
	    		self.xinit = x
	    		self.yinit = y
	    	elif event == cv2.EVENT_MOUSEMOVE:
	    		if self.dragging == True:
	    			self.xoff = (x - self.xinit)
	    			self.yoff = (y - self.yinit)
	    	elif event == cv2.EVENT_LBUTTONUP:
	    		self.dragging = False