dragfils

import sys
import os
from PyQt5.Qt import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import cv2
import numpy as np

class TestListView(QListWidget):
    dropped = pyqtSignal(list)
    def __init__(self, type, parent=None):
        super(TestListView, self).__init__(parent)
        self.setAcceptDrops(True)
        self.setIconSize(QSize(72, 72))

    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls:
            event.accept()
        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(Qt.CopyAction)
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(Qt.CopyAction)
            event.accept()
            links = []
            for url in event.mimeData().urls():
                links.append(str(url.toLocalFile()))
            self.dropped.emit(links)
        else:
            event.ignore()

class MainForm(QMainWindow):
    def __init__(self, parent=None):
        super(MainForm, self).__init__(parent)

        self.view = TestListView(self)
        self.view.dropped.connect(self.pictureDropped)
        self.setCentralWidget(self.view)
        self.file1=""
        self.file2=""
        self.urlnum=0

    def pictureDropped(self, l):
        print(self.urlnum)
        if(self.urlnum!=0 and self.urlnum%2==0):
            print("clear")
            self.view.clear()
            self.file1=""
            self.file2=""
        for url in l:
            if os.path.exists(url):
                print(url)
                if(self.file1=="" and self.file2==""):
                    self.file1=url
                else:
                    self.file2=url
                if(self.file1 is not "" and self.file2 is not ""):
                    img1=cv2.imread(self.file1,0)
                    img1=cv2.copyMakeBorder(img1, 5, 5, 4, 4, cv2.BORDER_CONSTANT, value=0)
                    img1=cv2.cvtColor(img1, cv2.COLOR_GRAY2BGR)
                    img2=cv2.imread(self.file2,0)
                    img2=cv2.copyMakeBorder(img2, 5, 5, 4, 4, cv2.BORDER_CONSTANT, value=0)
                    img2=cv2.cvtColor(img2, cv2.COLOR_GRAY2BGR)
                    stkimg=np.vstack([img1,img2])
                    strname="./stack/"+str(self.urlnum/2)+".jpg"
                    cv2.imwrite(strname,stkimg)
                    #cv2.waitKey(0)
                   
                self.urlnum=self.urlnum+1               
                icon = QIcon(url)
                pixmap = icon.pixmap(72, 72)
                icon = QIcon(pixmap)
                item = QListWidgetItem(url, self.view)
                item.setIcon(icon)
                item.setStatusTip(url)

def main():
    app = QApplication(sys.argv)
    form = MainForm()
    form.show()
    app.exec_()

if __name__ == '__main__':
    main()