PyQt5 QPixmap

[ChrisOfBristol]

I've just converted a small app from Python2/Qt4 to Python3/Qt5 without much difficulty. It displays .jpg images, but it no longer displays .tif images.

#! /usr/bin/python3                                 
 
import sys
from PyQt5 import QtCore, QtGui, QtWidgets          
from test_ui import Ui_MainWindow
 
class MyWindowClass(QtWidgets.QMainWindow):             
    def __init__(self, parent=None):
        QtWidgets.QMainWindow.__init__(self, parent)   
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
 
        self.ui.buttonProcessOne.clicked.connect(self.pushButtonClicked)
 
    def pushButtonClicked(self):
        myPixmap = QtGui.QPixmap('image1.tif')
        self.ui.label.setScaledContents(True)
        self.ui.label.setPixmap(myPixmap)   
 
 
if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)          
    mywindow = MyWindowClass()
    mywindow.show()
    sys.exit(app.exec_())

#! /usr/bin/python3                                 
 
import sys
from PyQt5 import QtCore, QtGui, QtWidgets          
from test_ui import Ui_MainWindow
 
class MyWindowClass(QtWidgets.QMainWindow):             
    def __init__(self, parent=None):
        QtWidgets.QMainWindow.__init__(self, parent)   
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

        self.ui.buttonProcessOne.clicked.connect(self.pushButtonClicked)

    def pushButtonClicked(self):
        myPixmap = QtGui.QPixmap('image1.tif')
        self.ui.label.setScaledContents(True)
        self.ui.label.setPixmap(myPixmap)   
        
 
if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)          
    mywindow = MyWindowClass()
    mywindow.show()
    sys.exit(app.exec_())

To copy to clipboard, switch view to plain text mode 

I have tried QtWidgets.QPixmap instead of QtGui.

[anda_skoa]

Maybe plugin for tif images did not get built or was not loaded.

Check QtGui.QImageReader.supportedImageFormats()

Cheers,
_

[ChrisOfBristol]

I'd tried something like that and it didn't work because I'd got something wrong. This one works, with this result:

[PyQt5.QtCore.QByteArray(b'bmp'), PyQt5.QtCore.QByteArray(b'gif'), PyQt5.QtCore.QByteArray(b'ico'), PyQt5.QtCore.QByteArray(b'jpeg'), PyQt5.QtCore.QByteArray(b'jpg'), PyQt5.QtCore.QByteArray(b'pbm'), PyQt5.QtCore.QByteArray(b'pgm'), PyQt5.QtCore.QByteArray(b'png'), PyQt5.QtCore.QByteArray(b'ppm'), PyQt5.QtCore.QByteArray(b'svg'), PyQt5.QtCore.QByteArray(b'svgz'), PyQt5.QtCore.QByteArray(b'xbm'), PyQt5.QtCore.QByteArray(b'xpm')]

Any idea what I need to do to load the right plugin?

[anda_skoa]

You don't have to do anything in particular, it looks like the plugin for tif is missing.

Comparing the documentation of QImageReader of Qt4 and Qt5 it seems that TIFF is no longer supported by default.

No idea why or if the plugin was moved to a addon package of sorts.

Cheers,
_

[ChrisOfBristol]

I have found a package in the software manager called qt5-image-formats-plugins. Installing this fixes the problem.