give focus on wheel scrolling

bigtext.py

@@ -64,6 +64,7 @@ class InnerBigText(QWidget):
         self.model = model
         self.parent = parent
         self.setFocusPolicy(Qt.FocusPolicy.StrongFocus)
+        self.setFocusPolicy(Qt.FocusPolicy.WheelFocus)
 
         self.font = QFont("monospace", 12)
         self.update_font_metrics(QPainter(self))
@@ -84,13 +85,13 @@ class InnerBigText(QWidget):
     def keyPressEvent(self, e: QKeyEvent) -> None:
         lines_to_scroll = math.floor(self.lines_shown()) -1
         if e.key() == Qt.Key.Key_PageUp:
-            self.scroll_by_lines(lines_to_scroll)
-        if e.key() == Qt.Key.Key_PageDown:
             self.scroll_by_lines(-lines_to_scroll)
+        if e.key() == Qt.Key.Key_PageDown:
+            self.scroll_by_lines(lines_to_scroll)
         if e.key() == 16777235:
-            self.scroll_by_lines(3)
-        if e.key() == 16777237:
             self.scroll_by_lines(-3)
+        if e.key() == 16777237:
+            self.scroll_by_lines(3)
 
     def wheelEvent(self, event: QWheelEvent):
         direction = 1 if event.angleDelta().y() < 0 else -1

logFileModel.py

@@ -13,7 +13,7 @@ class LogFileModel:
         self._file = file
 
     def data(self, byte_offset, scroll_lines, lines) -> List[Line]:
-        print("data(%s, %s, %s)" % (byte_offset, scroll_lines, lines))
+        #print("data(%s, %s, %s)" % (byte_offset, scroll_lines, lines))
         lines_before_offset: List[Line] = []
         lines_after_offset: List[Line] = []
         result: List[Line] = []