42 lines
1.0 KiB
Python
42 lines
1.0 KiB
Python
from datetime import datetime
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from vnpy.trader.ui import create_qapp, QtCore
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from vnpy.trader.database import database_manager
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from vnpy.trader.constant import Exchange, Interval
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from vnpy.chart import ChartWidget, VolumeItem, CandleItem
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if __name__ == "__main__":
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app = create_qapp()
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bars = database_manager.load_bar_data(
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"IF88",
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Exchange.CFFEX,
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interval=Interval.MINUTE,
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start=datetime(2019, 7, 1),
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end=datetime(2019, 7, 17)
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)
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widget = ChartWidget()
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widget.add_plot("candle", hide_x_axis=True)
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widget.add_plot("volume")
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widget.add_item(CandleItem, "candle", "candle")
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widget.add_item(VolumeItem, "volume", "volume")
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widget.add_cursor()
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n = 1000
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history = bars[:n]
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new_data = bars[n:]
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widget.update_history(history)
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def update_bar():
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bar = new_data.pop(0)
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widget.update_bar(bar)
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timer = QtCore.QTimer()
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timer.timeout.connect(update_bar)
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# timer.start(100)
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widget.show()
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app.exec_()
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