graphicspixmapwidget: PyQt6 compatibility

Orange/widgets/utils/graphicspixmapwidget.py

@@ -112,7 +112,9 @@ def paint(
         exposedcrect = crect.intersected(exposed)
         pixmaptransform = self.pixmapTransform()
         # map exposed rect to exposed pixmap coords
-        assert pixmaptransform.type() <= QTransform.TxRotate
+        assert pixmaptransform.type() in (
+            QTransform.TxNone, QTransform.TxTranslate, QTransform.TxScale
+        )
         pixmaptransform, ok = pixmaptransform.inverted()
         if not ok:
             painter.drawPixmap(

Orange/widgets/utils/tests/test_graphicspixmapwidget.py

@@ -0,0 +1,37 @@
+from AnyQt.QtCore import Qt, QSize, QSizeF
+from AnyQt.QtGui import QPixmap
+from AnyQt.QtWidgets import QGraphicsScene, QGraphicsView
+
+from orangewidget.tests.base import GuiTest
+from Orange.widgets.utils.graphicspixmapwidget import GraphicsPixmapWidget
+
+
+class TestGraphicsPixmapWidget(GuiTest):
+    def setUp(self) -> None:
+        super().setUp()
+        self.scene = QGraphicsScene()
+        self.view = QGraphicsView(self.scene)
+
+    def tearDown(self) -> None:
+        self.scene.clear()
+        self.scene.deleteLater()
+        self.view.deleteLater()
+        del self.scene
+        del self.view
+
+    def test_graphicspixmapwidget(self):
+        w = GraphicsPixmapWidget()
+        self.scene.addItem(w)
+        w.setPixmap(QPixmap(100, 100))
+        p = w.pixmap()
+        self.assertEqual(p.size(), QSize(100, 100))
+        self.view.grab()
+        w.setScaleContents(True)
+        w.setAspectRatioMode(Qt.KeepAspectRatio)
+        s = w.sizeHint(Qt.PreferredSize)
+        self.assertEqual(s, QSizeF(100., 100.))
+        s = w.sizeHint(Qt.PreferredSize, QSizeF(200., -1.))
+        self.assertEqual(s, QSizeF(200., 200.))
+        s = w.sizeHint(Qt.PreferredSize, QSizeF(-1., 200.))
+        self.assertEqual(s, QSizeF(200., 200.))
+        self.view.grab()