QscrollArea QPixmap Qtimer

显示图片是我们经常使用到的功能，如何在pyqt中显示图片呢?我们可以使用label来承载图片。那么多张图片如何显示呢？答案是我们可以使用QScrollArea来承载多张图片。

import os
import sys
from PyQt5 import QtCore, QtGui, QtWidgets

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        url = "./"# ...
        #highlight_dir = url + '\\highlighted'
        highlight_dir = url 

        self.scrollArea = QtWidgets.QScrollArea(widgetResizable=True)
        self.setCentralWidget(self.scrollArea)
        content_widget = QtWidgets.QWidget()
        self.scrollArea.setWidget(content_widget)
        self._lay = QtWidgets.QVBoxLayout(content_widget)

        self.files_it = iter([os.path.join(highlight_dir, file) for file in os.listdir(highlight_dir)])

        self._timer = QtCore.QTimer(self, interval=1)
        self._timer.timeout.connect(self.on_timeout)
        self._timer.start()

    def on_timeout(self):
        try:
            file = next(self.files_it)
            pixmap = QtGui.QPixmap(file)
            self.add_pixmap(pixmap)
        except StopIteration:
            self._timer.stop()

    def add_pixmap(self, pixmap):
        if not pixmap.isNull():
            label = QtWidgets.QLabel(pixmap=pixmap)
            self._lay.addWidget(label)

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())