你快成图表专家了！

hxxjava wrote:

你快成图表专家了！
谢谢。这两天认真学习了您的帖子，收获很大。工欲善其事必先利其器，绘制好了实时K线图和所用指标，就可以方便知道每笔交易的入场点和出场点，便于复盘和改进策略了。

请教在苹果mac os上面macd图的比例缩放似乎不对，绿柱完全没有，红柱显示一小部分，快慢线经常跑出范围，大概是什么地方出了问题？

经测试，把main函数里的dynamic修改为TRUE，动态进数据macd图就能够正常显示了，虽然偶尔有些快慢线还会跑外面去。感觉这一块应该是哪里计算出了点小问题

人家 wrote:

请教在苹果mac os上面macd图的比例缩放似乎不对，绿柱完全没有，红柱显示一小部分，快慢线经常跑出范围，大概是什么地方出了问题？

我回入回测K线图后，也有同样的问题。我看到高度范围一直是0-1，应该是显示范围不对，不知道在什么地方改？

yyds 马克一下

Traceback (most recent call last):
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\kx_chart.py", line 306, in <module>
widget = NewChartWidget(event_engine = event_engine)
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\kx_chart.py", line 83, in init
self.add_item(OrderItem, "order", "candle")
File "C:\veighna_studio\lib\site-packages\vnpy\chart\widget.py", line 123, in add_item
item = item_class(self._manager)
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\chart_items.py", line 554, in init
super(CandleItem,self).init(manager)
File "C:\veighna_studio\lib\site-packages\vnpy\chart\item.py", line 18, in init
super().init()
File "C:\veighna_studio\lib\site-packages\pyqtgraph\graphicsItems\GraphicsObject.py", line 17, in init
QtGui.QGraphicsObject.init(self, *args)
RuntimeError: You can't initialize an object twice！
程序报错了，楼主！不知道是哪里出了，请问楼主能帮我检查一下吗

知道，是因为3.0版本升级，导致OrderItem和TradeItem的多继承出了问题。
目前没有时间，等有空再重写这两个主图组件就可以了。

小鼠之森 wrote:

Traceback (most recent call last):
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\kx_chart.py", line 306, in <module>
widget = NewChartWidget(event_engine = event_engine)
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\kx_chart.py", line 83, in init
self.add_item(OrderItem, "order", "candle")
File "C:\veighna_studio\lib\site-packages\vnpy\chart\widget.py", line 123, in add_item
item = item_class(self._manager)
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\chart_items.py", line 554, in init
super(CandleItem,self).init(manager)
File "C:\veighna_studio\lib\site-packages\vnpy\chart\item.py", line 18, in init
super().init()
File "C:\veighna_studio\lib\site-packages\pyqtgraph\graphicsItems\GraphicsObject.py", line 17, in init
QtGui.QGraphicsObject.init(self, *args)
RuntimeError: You can't initialize an object twice！
程序报错了，楼主！不知道是哪里出了，请问楼主能帮我检查一下吗

class TradeItem(CandleItem,ScatterPlotItem): 
    """
    成交单绘图部件
    """
    def __init__(self, manager: BarManager):
        """"""
        #ScatterPlotItem.__init__(self)
        # CandleItem.__init__(self,manager)
        # super(TradeItem,self).__init__(manager)
        super().__init__(manager)

新版本多继承改成super继承，不然会实例化两次，然后把candleitem换到前面，让他先找candleitem就可以了。 oderitem也一样

另外谢谢大大分享

人家 wrote:

经测试，把main函数里的dynamic修改为TRUE，动态进数据macd图就能够正常显示了，虽然偶尔有些快慢线还会跑外面去。感觉这一块应该是哪里计算出了点小问题
我也是mac 情况和你一样

小虾米 wrote:

小鼠之森 wrote:

Traceback (most recent call last):
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\kx_chart.py", line 306, in <module>
widget = NewChartWidget(event_engine = event_engine)
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\kx_chart.py", line 83, in init
self.add_item(OrderItem, "order", "candle")
File "C:\veighna_studio\lib\site-packages\vnpy\chart\widget.py", line 123, in add_item
item = item_class(self._manager)
File "C:\Users\zx\Documents\repository\vnpy-master\examples\trade\chart_items.py", line 554, in init
super(CandleItem,self).init(manager)
File "C:\veighna_studio\lib\site-packages\vnpy\chart\item.py", line 18, in init
super().init()
File "C:\veighna_studio\lib\site-packages\pyqtgraph\graphicsItems\GraphicsObject.py", line 17, in init
QtGui.QGraphicsObject.init(self, *args)
RuntimeError: You can't initialize an object twice！
程序报错了，楼主！不知道是哪里出了，请问楼主能帮我检查一下吗

class TradeItem(CandleItem,ScatterPlotItem): 
    """
    成交单绘图部件
    """
    def __init__(self, manager: BarManager):
        """"""
        #ScatterPlotItem.__init__(self)
        # CandleItem.__init__(self,manager)
        # super(TradeItem,self).__init__(manager)
        super().__init__(manager)

新版本多继承改成super继承，不然会实例化两次，然后把candleitem换到前面，让他先找candleitem就可以了。 oderitem也一样

另外谢谢大大分享

这个有问题，虽然能跑出来，但是trade data没有画出来， 让他先继承　ScatterPlotItem的话
在实例化 NewChartWidget的时候会报错这个

 File "/Users/yangke/vnpy-3.0.0/examples/cta_backtesting/kchart_analysis_hxx.py", line 293, in <module>
    widget = NewChartWidget(event_engine = event_engine)
  File "/Users/yangke/vnpy-3.0.0/examples/cta_backtesting/kchart_analysis_hxx.py", line 102, in __init__
    self.add_item(TradeItem, "trade", "candle")
  File "/Users/yangke/opt/anaconda3/envs/vnpy3/lib/python3.10/site-packages/vnpy/chart/widget.py", line 123, in add_item
    item = item_class(self._manager)
  File "/Users/yangke/opt/anaconda3/envs/vnpy3/lib/python3.10/site-packages/vnpy/chart/chart_items.py", line 528, in __init__
    super().__init__(manager)
  File "/Users/yangke/opt/anaconda3/envs/vnpy3/lib/python3.10/site-packages/pyqtgraph/graphicsItems/ScatterPlotItem.py", line 441, in __init__
    self.setData(*args, **kargs)
  File "/Users/yangke/opt/anaconda3/envs/vnpy3/lib/python3.10/site-packages/pyqtgraph/graphicsItems/ScatterPlotItem.py", line 499, in setData
    self.addPoints(*args, **kargs)
  File "/Users/yangke/opt/anaconda3/envs/vnpy3/lib/python3.10/site-packages/pyqtgraph/graphicsItems/ScatterPlotItem.py", line 537, in addPoints
    numPts = len(kargs['spots'])
TypeError: object of type 'BarManager' has no len()