fix vertical scroll

used the wrong font height

bigtext.py

@@ -140,12 +140,16 @@ class InnerBigText(QWidget):
         painter.setPen(QColor(0, 0, 0))
         self.update_font_metrics(painter)
 
-        lines_to_show = self.height() / (self.fontMetrics().height())
+        lines_to_show = self.height() / float(self.char_height)
+        #print("%s / %s = %s" %(self.height(), float(self.char_height), lines_to_show))
+
         self.lines = self.model.data(self._byte_offset, self.scroll_lines, lines_to_show)
+        #print("lines_to_show: %d returned: %d" % (lines_to_show, len(self.lines)))
         self.scroll_lines=0
         self._byte_offset = self.lines[0].byte_offset()
-        self.parent.v_scroll_bar.setMaximum(
-            self.model.byte_count() - 1 - 10)  # document length == maximum + pageStep + aFewBytesSoThatTheLastLineIsShown
+        # document length == maximum + pageStep + aFewBytesSoThatTheLastLineIsShown
+        self.parent.v_scroll_bar.setMaximum(self.model.byte_count() - 1 - 10)
+
 
         for l in self.lines:
             self.update_longest_line(len(l.line()))
@@ -198,8 +202,7 @@ class InnerBigText(QWidget):
     def update_font_metrics(self, painter: QPainter):
         fm: QFontMetrics = painter.fontMetrics()
         self.char_height = fm.height()
-        self.char_width = fm.averageCharWidth()  # all chars have same with for monospace font
+        self.char_width = fm.averageCharWidth()  # all chars have same width for monospace font
         text = "012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
         self.char_width = fm.horizontalAdvance(text) / float(len(text))
-        # print("bounding rect: %s"%(boundingRect))
         #print("font width=%s height=%s" % (self.char_width, self.char_height))

example.log

@@ -123,3 +123,23 @@ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa|
 2018-09-06T00:00:31.311Z,2,vapfacbk01,ApplicationStateService.getState,AXC_5.14_526,,successful
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 ---------1---------2---------3---------4---------5---------6---------7---------8---------9--------10---------1---------2---------3---------4---------5---------6---------7---------8---------9--------10---------1---------2---------3---------4---------5---------6---------7---------8---------9--------10---------1---------2---------3---------4---------5---------6---------7---------8---------9--------10
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