How to show and update a FAST bitmap in Python?

Question

I have a device from which I read images. Each image is an array of eight gray columns in rows. How can I display a sequence of images as a video?

Something like that:

while !terminated: image = readImage(...) widget.updateImage(image, width, height) 

Specifications:

• must be implemented using PyQt

Answer 1

My best solution with PyQt:

 #! /usr/bin/python2 import sys from PyQt4 import QtGui from PyQt4 import QtCore class Preview(QtGui.QWidget): def __init__(self): super(Preview, self).__init__() self.setWindowTitle('Preview') self.previewImage = QtGui.QLabel(self) vbox = QtGui.QVBoxLayout() vbox.addWidget(self.previewImage) self.setLayout(vbox) self.updater = QtCore.QTimer() self.updater.setSingleShot(True) self.updater.setInterval(10) self.updater.timeout.connect(self.update) self.show() self.updater.start() def update(self): data = get_pgm(...) # this function reads device and adds PGM header pixmap = QtGui.QPixmap() pixmap.loadFromData(data) self.previewImage.setPixmap(pixmap) self.previewImage.show() self.updater.start() def main(): app = QtGui.QApplication(sys.argv) preview = Preview() sys.exit(app.exec_()) if __name__ == '__main__': main()