Exemple #1
0
    def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
        """"""
        # Create objects
        volume_picture = QtGui.QPicture()
        painter = QtGui.QPainter(volume_picture)

        # Set painter color
        if bar.close_price >= bar.open_price:
            painter.setPen(self._up_pen)
            painter.setBrush(self._up_brush)
        else:
            painter.setPen(self._down_pen)
            painter.setBrush(self._down_brush)

        # Draw volume body
        rect = QtCore.QRectF(
            ix - BAR_WIDTH,
            0,
            BAR_WIDTH * 2,
            bar.volume
        )
        painter.drawRect(rect)

        # Finish
        painter.end()
        return volume_picture
Exemple #2
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    def _draw_item_picture(self, min_ix: int, max_ix: int) -> None:
        """
        Draw the picture of item in specific range.
        """
        self._item_picuture = QtGui.QPicture()
        painter = QtGui.QPainter(self._item_picuture)

        for n in range(min_ix, max_ix):
            bar_picture = self._bar_picutures[n]
            bar_picture.play(painter)

        painter.end()
Exemple #3
0
    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