我使用PyQt5和Python2.7
我有UIWidget类，PlayStreaming类和Thread类。
一旦按下UIWidget中的按钮，然后将PlayStreaming中的字典对象发送到Thread类。
如果删除“ QVariantMap”，则可以收到按钮点击信号，但不能发送数据。
我该如何解决问题？
我的整个代码如下。
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication, QMainWindow, QInputDialog
import cv2
import time
import face_recognition.api as face_recognition
class Thread(QtCore.QThread):
changePixmap = QtCore.pyqtSignal(QtGui.QImage)
updateStatus = QtCore.pyqtSignal(str)
scaled_size = QtCore.QSize(640, 480)
curScale=1.0
facearray=[]
dim=(640,480)
processedImage=[]
def run(self):
cap = cv2.VideoCapture(-1)
cap.set(3,1280);
cap.set(4,1024);
time.sleep(2)
self.maxHeight=cap.get(cv2.CAP_PROP_FRAME_HEIGHT)
self.maxScale=self.maxHeight/480.0
while True:
ret, frame = cap.read()
if ret:
r=1
rescaleSize=int(480*self.curScale)
if(frame.shape[0] > 480 and frame.shape[1] > 640):
r = rescaleSize / float(frame.shape[0])
self.dim = (int(frame.shape[1] * r), rescaleSize)
processedImage=cv2.resize(frame, self.dim, fx=0.0, fy=0.0)
face_locations = face_recognition.face_locations(processedImage)
if(len(face_locations) > 0):
encodefaces(facelocs)
else:
processedImage=frame.copy()
face_locations = face_recognition.face_locations(processedImage)
if(len(face_locations) > 0):
encodefaces(facelocs)
for face_location in face_locations:
top, right, bottom, left = face_location
cv2.rectangle(frame,(int(right/r),int(top/r)),(int(left/r),int(bottom/r)),(0,255,0),2)
rgbImage = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
convertToQtFormat = QtGui.QImage(rgbImage.data, rgbImage.shape[1], rgbImage.shape[0], QtGui.QImage.Format_RGB888)
p = convertToQtFormat.scaled(self.scaled_size, QtCore.Qt.KeepAspectRatio)
self.changePixmap.emit(p)
@QtCore.pyqtSlot(QtCore.QSize)
def scaled(self, scaled_size):
self.scaled_size = scaled_size
@QtCore.pyqtSlot()
def scaleup(self):
self.curScale = self.curScale + 0.1
if self.curScale > self.maxScale:
self.curScale = self.maxScale
self.updateStatus.emit('Cur scale:'+str(self.dim))
@QtCore.pyqtSlot()
def scaledown(self):
self.curScale = self.curScale - 0.1
if self.curScale < 1.0:
self.curScale = 1.0
self.updateStatus.emit('Cur scale:'+str(self.dim))
@QtCore.pyqtSlot('QVariantMap')
def getfacestorecognize(self, clickedInfos):
facearray.append(clickedInfos)
print(clickedInfos['x']+' '+clickedInfos['y']+' '+clickedInfos['name'])
def encodefaces(self, facelocs):
if(len(self.facearray) > 0):
for face in facearray:
r=(self.scaled_size[0]/self.dim[0])
x=int(face['x'])*r
y=int(face['y'])*r
#for loc in facelocs:
class PlayStreaming(QtWidgets.QLabel):
reSize = QtCore.pyqtSignal(QtCore.QSize)
scaleupSignal = QtCore.pyqtSignal()
scaledownSignal = QtCore.pyqtSignal()
transferFaceInfosSignal = QtCore.pyqtSignal()#'QVariantMap'
def __init__(self):
super(PlayStreaming, self).__init__()
self.initUI()
self.mousePressEvent = self.showDialog
@QtCore.pyqtSlot(QtGui.QImage)
def setImage(self, image):
self.label.setPixmap(QtGui.QPixmap.fromImage(image))
def initUI(self):
# create a label
self.label = QtWidgets.QLabel(self)
th = Thread(self)
th.changePixmap.connect(self.setImage)
th.updateStatus.connect(self.handle_status_message)
self.scaleupSignal.connect(th.scaleup)
self.scaledownSignal.connect(th.scaledown)
self.transferFaceInfosSignal.connect(th.getfacestorecognize)
self.reSize.connect(th.scaled)
th.start()
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(self.label, alignment=QtCore.Qt.AlignCenter)
def resizeEvent(self, event):
self.reSize.emit(self.size())
def showDialog(self, event):
x = event.pos().x()
y = event.pos().y()
facedata={"x": str(x), "y": str(y), "name": ''}
text, ok = QInputDialog.getText(self, 'Name input dialog',
'Enter name:')
if (ok and str(text)!=''):
facedata['name']=str(text)
self.transferFaceInfosSignal.emit(facedata)
def handle_status_message(self, message):
self.window().set_status_message(message)
class UIWidget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(UIWidget, self).__init__(parent)
# Initialize tab screen
self.tabs = QtWidgets.QTabWidget()
self.tab1 = QtWidgets.QWidget()
self.tab2 = QtWidgets.QWidget()
self.tab3 = QtWidgets.QWidget()
# Add tabs
self.tabs.addTab(self.tab1, "Face")
self.tabs.addTab(self.tab2, "Human")
self.tabs.addTab(self.tab3, "Vehicle")
self.display = PlayStreaming()
# Create first tab
self.createGridLayout()
self.tab1.layout = QtWidgets.QVBoxLayout()
self.tab1.layout.addWidget(self.display, stretch=1)
self.tab1.layout.addWidget(self.horizontalGroupBox)
self.tab1.setLayout(self.tab1.layout)
# Add tabs to widget
layout = QtWidgets.QVBoxLayout(self)
layout.addWidget(self.tabs)
def createGridLayout(self):
self.horizontalGroupBox = QtWidgets.QGroupBox("")
self.horizontalGroupBox.setStyleSheet("QGroupBox{ background-color: red; border: none;}")
hlay1 = QtWidgets.QHBoxLayout()
self.TestButton=QtWidgets.QPushButton('Test')
hlay1.addWidget(self.TestButton)
self.RunButton=QtWidgets.QPushButton('Run')
hlay1.addWidget(self.RunButton)
self.ScaleUpButton=QtWidgets.QPushButton('ScaleUp')
self.ScaleUpButton.clicked.connect(self.display.scaleupSignal)
hlay1.addWidget(self.ScaleUpButton)
self.ScaleDownButton=QtWidgets.QPushButton('ScaleDown')
self.ScaleDownButton.clicked.connect(self.display.scaledownSignal)
hlay1.addWidget(self.ScaleDownButton)
hlay1.addWidget(QtWidgets.QPushButton('Reset'))
hlay2 = QtWidgets.QHBoxLayout()
hlay2.addWidget(QtWidgets.QPushButton('Set Faces'))
hlay2.addWidget(QtWidgets.QPushButton('FacePose'))
hlay2.addWidget(QtWidgets.QPushButton('Gender'))
hlay2.addWidget(QtWidgets.QPushButton('Age'))
self.RecognizeButton=QtWidgets.QPushButton('Recognize')
self.RecognizeButton.clicked.connect(self.display.transferFaceInfosSignal)
hlay2.addWidget(self.RecognizeButton)
layout = QtWidgets.QVBoxLayout()
layout.addLayout(hlay1)
layout.addLayout(hlay2)
self.horizontalGroupBox.setLayout(layout)
class App(QMainWindow):
def __init__(self):
super(App,self).__init__()
self.title = 'FaceHumanVehicle'
self.left = 10
self.top = 10
self.width = 1000
self.height = 800
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
self.form_widget = UIWidget(self)
self.statusBar().showMessage('')
self.setCentralWidget(self.form_widget)
self.show()
def set_status_message(self, message):
return self.statusBar().showMessage(message)
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
答案 0 :(得分：1)
据我了解，您想在按下按钮时发送数据，因此连接到按钮的插槽应该发出信号，而不是信号。为此，我在mousePressEvent中填写的数据必须是该类的成员，在这种情况下，逻辑是保存在按下图像时的位置，并且在按下按钮时将打开一个对话框，将建立一个名称并发送数据。
class PlayStreaming(QtWidgets.QLabel):
reSize = QtCore.pyqtSignal(QtCore.QSize)
scaleupSignal = QtCore.pyqtSignal()
scaledownSignal = QtCore.pyqtSignal()
transferFaceInfosSignal = QtCore.pyqtSignal('QVariantMap') # <--- +++
def __init__(self):
super(PlayStreaming, self).__init__()
self.facedata = {"x": "", "y": "", "name": ""} # <--- +++
self.initUI()
# self.mousePressEvent = self.showDialog <--- ---
# ...
def mousePressEvent(self, event):
self.facedata["x"] = str(event.pos().x())
self.facedata["y"] = str(event.pos().y())
self.showDialog()
super(PlayStreaming, self).mousePressEvent(event)
def showDialog(self):
text, ok = QtWidgets.QInputDialog.getText(self, 'Name input dialog', 'Enter name:')
if ok and text:
self.facedata['name']= text
@QtCore.pyqtSlot()
def send_signal(self)
if self.facedata["name"]:
self.transferFaceInfosSignal.emit(self.facedata)
class UIWidget(QtWidgets.QWidget):
# ...
def createGridLayout(self):
# ...
self.RecognizeButton.clicked.connect(self.display.send_signal)
# ...
另一方面，信号和插槽支持所有本地python类型（如dict），因此您可以将'QVariantMap'替换为dict。