scroll by wheel

bigtext.py

@@ -20,6 +20,7 @@ from settings import Settings
 class BigText(QWidget):
     _byte_offset = 0
     _left_offset = 0
+    scroll_lines = 0
 
     highlights: [Highlight] = []
 
@@ -42,6 +43,14 @@ class BigText(QWidget):
     def paintEvent(self, event: QPaintEvent) -> None:
         self.draw()
 
+    def wheelEvent(self, event: QWheelEvent):
+        direction = 1 if event.angleDelta().y() > 0 else -1
+        #print("wheel event fired :) %s" % (direction))
+        self.scroll_lines = direction * 3
+        self.update()
+        #self.draw(direction * 3)
+        #self._vscrollbar.setValue(self._byte_offset)
+
     def mousePressEvent(self, e: QMouseEvent) -> None:
         if e.buttons() == Qt.MouseButton.LeftButton:
             offset = self.to_byte_offset(e)
@@ -80,7 +89,9 @@ class BigText(QWidget):
         self.update_font_metrics(painter)
 
         lines_to_show = self.height() / (self.fontMetrics().height())
-        self.lines = self.model.data(self._byte_offset, lines_to_show)
+        self.lines = self.model.data(self._byte_offset, self.scroll_lines, lines_to_show)
+        self.scroll_lines=0
+        self._byte_offset = self.lines[0].byte_offset()
 
         # draw hightlights first - some characters may overlap to the next line
         # by drawing the background hightlights first we prevent that the hightlight