Problem with using QPixmap.scaled

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Recently I'm learning to use PyQt4 , but I've had a question about using the line of code to modify the scale of an image: 

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName(_fromUtf8("Form"))
        Form.resize(743, 510)
        self.pushButton = QtGui.QPushButton(Form)
        self.pushButton.setGeometry(QtCore.QRect(20, 430, 85, 27))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.foto = QtGui.QLineEdit(Form)
        self.foto.setGeometry(QtCore.QRect(20, 390, 700, 27))
        self.foto.setObjectName(_fromUtf8("Diretorio"))
        self.label = QtGui.QLabel(Form)
        self.label.setGeometry(QtCore.QRect(30, 26, 671, 341))
        self.label.setText(_fromUtf8(""))
        self.label.setObjectName(_fromUtf8("label"))
        self.horizontalSlider = QtGui.QSlider(Form)
        self.horizontalSlider.setGeometry(QtCore.QRect(120, 430, 601, 18))
        self.horizontalSlider.setMaximum(255)
        self.horizontalSlider.setOrientation(QtCore.Qt.Horizontal)
        self.horizontalSlider.setObjectName(_fromUtf8("horizontalSlider"))
        self.label_2 = QtGui.QLabel(Form)
        self.label_2.setGeometry(QtCore.QRect(380, 450, 71, 17))
        self.label_2.setObjectName(_fromUtf8("label_2"))

        self.retranslateUi(Form)
        QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL(_fromUtf8("clicked()")), self.abrirfoto)
        #self.horizontalSlider.valueChanged.connect(self.threshold)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        Form.setWindowTitle(_translate("Form", "Testando", None))
        self.pushButton.setText(_translate("Form", "Abrir", None))
        self.label_2.setText(_translate("Form", "Threshold", None))

    def abrirfoto(self):

        img = self.foto.text()
        self.label.setPixmap(QtGui.QPixmap(img))
        QtGui.QPixmap.scaled(671,341,0,0)

And returns error:

  

TypeError: arguments did not match any overloaded call:     QPixmap.scaled (int, int, Qt.AspectRatioMode aspectRatioMode = Qt.IgnoreAspectRatio, Qt.TransformationMode transformMode = Qt.FastTransformation): first argument of unbound method must have type 'QPixmap'     QPixmap.scaled (QSize, Qt.AspectRatioMode aspectRatioMode = Qt.IgnoreAspectRatio, Qt.TransformationMode transformMode = Qt.FastTransformation): first argument of unbound method must have type 'QPixmap'

    
asked by anonymous 20.06.2016 / 18:55

1 answer

1

I added a variable in the abrirfoto function, which was associated with the .scaled function, thus: 

def abrirfoto(self): 
    img = self.foto.text()
    imagem = QtGui.QPixmap(img) 
    imagem1 = imagem.scaled(671,341,QtCore.Qt.IgnoreAspectRatio,QtCore.Qt.FastTransformation) 
    self.label.setPixmap(QtGui.QPixmap(imagem1))
    
27.06.2016 / 15:17
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