I have made a opencv project which processes input stream from the video and displays the processed output. I have used PyQt buttons to switch from one output to another. My PyQt window covvers almost the entire screen and when i click on my buttons, the opencv window remains behind the PyQt window. Also, I have made the main window of PyQt my parent window. How can I bring the opencv window on top of PyQt window. I searched for cvGetWindowHandle(), but didn't find it's implementation for python.
I have used PyQt4 and opencv2, and the PyQt window has not been designed using a QtDesigner.
You can always wrap OpenCV window in Qt widget...
class QtCapture(QtGui.QWidget):
def __init__(self, *args):
super(QtGui.QWidget, self).__init__()
self.fps = 24
self.cap = cv2.VideoCapture(*args)
self.video_frame = QtGui.QLabel()
lay = QtGui.QVBoxLayout()
lay.setMargin(0)
lay.addWidget(self.video_frame)
self.setLayout(lay)
def setFPS(self, fps):
self.fps = fps
def nextFrameSlot(self):
ret, frame = self.cap.read()
# OpenCV yields frames in BGR format
frame = cv2.cvtColor(frame, cv2.cv.CV_BGR2RGB)
img = QtGui.QImage(frame, frame.shape[1], frame.shape[0], QtGui.QImage.Format_RGB888)
pix = QtGui.QPixmap.fromImage(img)
self.video_frame.setPixmap(pix)
def start(self):
self.timer = QtCore.QTimer()
self.timer.timeout.connect(self.nextFrameSlot)
self.timer.start(1000./self.fps)
def stop(self):
self.timer.stop()
def deleteLater(self):
self.cap.release()
super(QtGui.QWidget, self).deleteLater()
...and do with it whatever you will:
class ControlWindow(QtGui.QWidget):
def __init__(self):
QtGui.QWidget.__init__(self)
self.capture = None
self.start_button = QtGui.QPushButton('Start')
self.start_button.clicked.connect(self.startCapture)
self.quit_button = QtGui.QPushButton('End')
self.quit_button.clicked.connect(self.endCapture)
self.end_button = QtGui.QPushButton('Stop')
vbox = QtGui.QVBoxLayout(self)
vbox.addWidget(self.start_button)
vbox.addWidget(self.end_button)
vbox.addWidget(self.quit_button)
self.setLayout(vbox)
self.setWindowTitle('Control Panel')
self.setGeometry(100,100,200,200)
self.show()
def startCapture(self):
if not self.capture:
self.capture = QtCapture(0)
self.end_button.clicked.connect(self.capture.stop)
self.capture.setFPS(30)
self.capture.setParent(self)
self.capture.setWindowFlags(QtCore.Qt.Tool)
self.capture.start()
self.capture.show()
def endCapture(self):
self.capture.deleteLater()
self.capture = None
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
window = ControlWindow()
sys.exit(app.exec_())
