import sys , glob ,os,re
from zipfile import ZipFile
from PyQt5.QtWidgets import QApplication, QWidget, QLabel,QVBoxLayout
from PyQt5.QtGui import QPixmap 
from PyQt5.QtSvg import QSvgRenderer,QSvgWidget
from PyQt5.QtCore import Qt,QPoint

class App(QWidget):

    def __init__(self):
        super().__init__()
        self.setAcceptDrops(True)
        self.title = 'PyQt Viewer'
        self.pics=[]
        self.current={'index':0, 'picslen':0}
        self.ges = {'flag':False , 'pos':QPoint() , 'cmd':'' ,'sensibility':20}
        self.command = [
                    ['→←→' , 'cm_bye' ] ,
                    ['↓→↓' , 'cm_del' ] ,
                    ['↑→↑' , 'cm_bye' ] ,
                    ['↓→↑' , 'cm_bye' ] ,
            ]

        self.setWindowTitle(self.title)
        self.__lyt = QVBoxLayout()
        self.__lyt.setContentsMargins(0, 0, 0, 0)
        self.__lyt.setSpacing(0)
        self.setLayout(self.__lyt)

        self.label = QLabel(self)
        self.__lyt.addWidget(self.label)

        pixmap = QPixmap(<pass>)
        self.label.setPixmap(pixmap)
        self.resize(pixmap.width(),pixmap.height())
        self.show()

    def dragEnterEvent(self, e):               # これ必要 ここでacceptしてやる
        e.accept()

    def dropEvent(self, e):                    # ここで受け取る
        self.showimage(e.mimeData().text()[8:])
        self.getpictures(e.mimeData().text()[8:])

    def showimage(self,e):
        pixmap = QPixmap(e)
        self.label.setPixmap(pixmap)
        self.resize(pixmap.width(),pixmap.height())
        self.show()

    def showzip(self,fname):
        zi = ZipFile( fname , 'r' )
        l_name = zi.namelist()
        with zi.open( l_name[0] ) as z_image :
            pix = QPixmap()
            pix.loadFromData(z_image.read())
            self.label.setPixmap(pix)
            self.resize(pix.width(),pix.height())
            self.show()
        zi.close()

    def mousePressEvent(self,e):
        if e.button() == Qt.MidButton :
            quit() # <----------- 終了処理書いた方が良いのかな
        elif e.button() == Qt.RightButton  :
            self.ges['flag']=True
            self.ges['pos'] =e.pos()

    def mouseMoveEvent (self, e):
        if self.ges['flag'] :
            if self.ges['pos'].x() - e.x() > self.ges['sensibility'] : # left
                self.ges['cmd'] += '←'
                self.ges['pos'] =e.pos()
            elif self.ges['pos'].x() - e.x() < -1*self.ges['sensibility'] : # right
                self.ges['cmd'] += '→'
                self.ges['pos'] =e.pos()
            elif self.ges['pos'].y() - e.y() < -1*self.ges['sensibility'] : # up
                self.ges['cmd'] += '↑'
                self.ges['pos'] =e.pos()
            elif self.ges['pos'].y() - e.y() > self.ges['sensibility'] : # down
                self.ges['cmd'] += '↓'
                self.ges['pos'] =e.pos()
            self.setWindowTitle( '-- mouse GESTURE [ {} ]--'.format(self.ges['cmd'] ))

    def mouseReleaseEvent (self, e):
        if self.ges['flag']  and ( e.button() == Qt.RightButton ) :
            self.ges['flag'] =False
            self.goGesture()

    def goGesture(self):
        cmd=re.sub(r'(.)\1{1,}',r'\1', self.ges['cmd'] )
        self.ges['cmd'] = ''
        ccmd=''
        for l in self.command :
            if l[0] == cmd :
                ccmd=l[1]
                print(ccmd)
        if ccmd == 'cm_bye':
            quit()
        elif ccmd== '' :
            self.setWindowTitle( r'-- GESTURE  MISSING --')
            # self.setWindowTitle( r'-- GESTURE -- ┐('д')┌ -- MISSING --')
        elif ccmd== 'cm_del' :
            pass

    def getpictures(self,e):
        ext=['jpg','jpeg','png','gif']
        os.chdir(os.path.split(e)[0]) 
        for f in ext :
            self.pics += glob.glob( '*.'+ f )
        self.pics.sort()
        print( self.pics )
        self.current['picslen']=len(self.pics)
        try:
            self.current['index']=self.pics.index(os.path.split(e)[1])
        except:
            self.current['index']=0
    
    def wheelEvent (self, e):#  mousewheel 引いたら-ｙが128
        if e.angleDelta().y() < 0 : # increase
            self.current['index'] +=1
            if self.current['index'] > self.current['picslen'] -1 :
                self.current['index']=0
        else:
            self.current['index'] -=1
            if self.current['index'] < 0 :
                self.current['index']=self.current['picslen']-1

        fname=self.pics[self.current['index']]
        if ('-zip-' in fname ):
            self.showzip(fname)
        else:
            self.showimage(self.pics[self.current['index'] ])

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    # ex.show()
    sys.exit(app.exec_())