def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
""""""
# Create objects
candle_picture = QtGui.QPicture()
painter = QtGui.QPainter(candle_picture)
# Set painter color
if bar.close_price >= bar.open_price:
painter.setPen(self._up_pen)
painter.setBrush(self._black_brush)
else:
painter.setPen(self._down_pen)
painter.setBrush(self._down_brush)
# Draw candle shadow
if bar.high_price > bar.low_price:
painter.drawLine(QtCore.QPointF(ix, bar.high_price),
QtCore.QPointF(ix, bar.low_price))
# Draw candle body
if bar.open_price == bar.close_price:
painter.drawLine(
QtCore.QPointF(ix - BAR_WIDTH, bar.open_price),
QtCore.QPointF(ix + BAR_WIDTH, bar.open_price),
)
else:
rect = QtCore.QRectF(ix - BAR_WIDTH, bar.open_price, BAR_WIDTH * 2,
bar.close_price - bar.open_price)
painter.drawRect(rect)
# Finish
painter.end()
return candle_picture
def _update_label(self) -> None:
""""""
bottom_plot = list(self._plots.values())[-1]
axis_width = bottom_plot.getAxis("right").width()
axis_height = bottom_plot.getAxis("bottom").height()
axis_offset = QtCore.QPointF(axis_width, axis_height)
bottom_view = list(self._views.values())[-1]
bottom_right = bottom_view.mapSceneToView(
bottom_view.sceneBoundingRect().bottomRight() - axis_offset
)
for plot_name, label in self._y_labels.items():
if plot_name == self._plot_name:
label.setText(str(self._y))
label.show()
label.setPos(bottom_right.x(), self._y)
else:
label.hide()
dt = self._manager.get_datetime(self._x)
if dt:
self._x_label.setText(dt.strftime("%Y-%m-%d %H:%M:%S"))
self._x_label.show()
self._x_label.setPos(self._x, bottom_right.y())
self._x_label.setAnchor((0, 0))