def _draw_major_divisions(self, painter, stamps, start_stamp, division):
"""
Draw black hashed vertical grid-lines showing major time divisions.
:param painter: allows access to paint functions,''QPainter''
"""
label_y = self._history_top - self._playhead_pointer_size[1] - 5
for stamp in stamps:
x = self.map_stamp_to_x(stamp, False)
label = self._get_label(division, stamp - start_stamp)
label_x = x + self._major_divisions_label_indent
if label_x + QFontMetrics(
self._topic_font).width(label) < self.scene().width():
painter.setPen(self._default_pen)
painter.setBrush(QBrush(Qt.black))
path = QPainterPath()
path.addText(label_x, label_y, self._time_font, label)
painter.drawPath(path)
painter.setPen(self._major_division_pen)
painter.drawLine(
x, label_y - self._time_tick_height - self._time_font_size, x,
self._history_bottom)
painter.setBrush(self._default_brush)
painter.setPen(self._default_pen)
def _draw_topic_names(self, painter):
"""
Calculate positions of existing topic names and draw them on the left, one for each row
:param painter: ,''QPainter''
"""
topics = self._history_bounds.keys()
coords = [(self._margin_left,
y + (h / 2) + (self._topic_font_height / 2))
for (_, y, _, h) in self._history_bounds.values()]
for text, coords in zip([t.lstrip('/') for t in topics], coords):
path = QPainterPath()
path.addText(coords[0], coords[1], self._topic_font, text)
painter.setBrush(self._default_brush)
painter.setPen(self._default_pen)
painter.drawPath(path)
