wip: b30 ocr tab

ui/extends/shared/cv2_utils.py

@@ -0,0 +1,28 @@
+import cv2
+import numpy as np
+from PySide6.QtGui import QImage
+
+
+def cv2BgrMatToQImage(mat) -> QImage:
+    arr = np.ascontiguousarray(mat)
+    return QImage(
+        arr.data,
+        arr.shape[1],
+        arr.shape[0],
+        arr.strides[0],
+        QImage.Format.Format_RGB888,
+    ).rgbSwapped()
+
+
+def qImageToCvMatBgr(qImg: QImage):
+    # from Bing AI, references
+    # 1: https://stackoverflow.com/q/384759/16484891 | CC BY-SA 4.0
+    # 2: https://stackoverflow.com/q/37552924/16484891 | CC BY-SA 3.0
+    qImg = qImg.convertToFormat(QImage.Format.Format_RGB888)
+    qImg = qImg.copy().rgbSwapped()
+    return np.ndarray(
+        (qImg.height(), qImg.width(), 3),
+        buffer=qImg.constBits(),
+        strides=[qImg.bytesPerLine(), 3, 1],
+        dtype=np.uint8,
+    )

ui/extends/shared/delegates/imageDelegate.py

@@ -51,7 +51,10 @@ class ImageDelegate(QStyledItemDelegate):
             label.setWindowFlag(Qt.WindowType.WindowMinimizeButtonHint, False)
             label.setWindowFlag(Qt.WindowType.WindowMaximizeButtonHint, False)
             label.setWindowFlag(Qt.WindowType.WindowCloseButtonHint, True)
-            label.setWindowTitle(QFileInfo(self.getImagePath(index)).fileName())
+            imagePath = self.getImagePath(index)
+            label.setWindowTitle(
+                QFileInfo(imagePath).fileName() if imagePath else "Preview"
+            )
             pixmap = pixmap.scaled(
                 800,
                 800,