[Add] 为AlgoTrading增加能够自动生成UI的辅助代码

vnpy/trader/app/algoTrading/AlgoUiHelper.py

@@ -0,0 +1,131 @@
+# encoding: UTF-8
+
+from __future__ import division
+
+from collections import OrderedDict, defaultdict
+
+from PyQt5 import QtWidgets, QtGui
+from typing import Any, ClassVar, List, Dict, Union
+
+from vnpy.trader.app.algoTrading.algoTemplate import AlgoTemplate
+from vnpy.trader.app.algoTrading.uiAlgoWidget import AlgoWidget
+from vnpy.trader.vtConstant import constant
+import typing
+
+# 活动委托状态
+STATUS_ACTIVE = [constant.STATUS_NOTTRADED, constant.STATUS_PARTTRADED, constant.STATUS_UNKNOWN]
+
+_paramsForClass = defaultdict(dict)  # type: Dict[object, Dict[str, AlgoTemplate2Param]]
+
+validatorClasses = {
+    int: QtGui.QIntValidator,
+    float: QtGui.QDoubleValidator,
+    # key not exist for other types
+}
+
+
+#----------------------------------------------------------------------
+def param(name, displayName, internalType=str, choices=None):
+    #----------------------------------------------------------------------
+    def paramDecorator(cls):
+        _paramsForClass[cls][name] = AlgoTemplate2Param(name=name,
+                                                        displayName=displayName,
+                                                        internalType=internalType,
+                                                        choices=choices)
+        return cls
+
+    return paramDecorator
+
+
+#----------------------------------------------------------------------
+def paramsForClass(cls):
+    backup = cls
+    while cls.__class__ != object:
+        if cls in _paramsForClass:
+            return _paramsForClass[cls]
+        cls = cls.__class__
+    raise KeyError('class {} has no param assigned, use @param to decorate it'.format(backup.__name__))
+
+
+#----------------------------------------------------------------------
+def paramsForInstance(instance):
+    return paramsForClass(instance.__class__)
+
+
+#----------------------------------------------------------------------
+def getWidgetText(widget):
+    if 'currentText' in widget.__dict__:
+        return widget.currentText()
+    if 'plainText' in widget.__dict__:
+        return widget.plainText()
+    return widget.text()
+
+
+########################################################################
+class AlgoTemplate2Param:
+
+    #----------------------------------------------------------------------
+    def __init__(self, name, displayName, internalType, choices, ):
+        self.name = name  # type: str
+        self.displayName = displayName  # type: str
+        self.internalType = internalType
+        self.choices = choices  # type: [str]
+
+
+#----------------------------------------------------------------------
+def generateWidgetClass(algoClass):  # type: (Any)->object
+    templateName = algoClass.templateName
+
+    ########################################################################
+    class Widget(AlgoWidget):
+
+        #----------------------------------------------------------------------
+        def __init__(self, algoEngine, parent=None):
+            AlgoWidget.__init__(self, algoEngine, parent)
+            self.templateName = templateName
+            if '_inputs' not in self.__dict__:
+                self._inputs = {}
+
+        #----------------------------------------------------------------------
+        def _generateInputWidgetForParam(self, param):  # type: (AlgoTemplate2Param)->Any
+            if param.choices is None:
+                # 如果没有选项提供， UI应该是一个可以随意输入的编辑框
+                widget = QtWidgets.QLineEdit()
+
+                # 某些内部数据可以使用qt的validator来检查输入值
+                if param.internalType in validatorClasses:
+                    validator = validatorClasses[param.internalType]()
+                    widget.setValidator(validator)
+
+            else:
+                # 如果有选项提供，那UI应该是一个下拉框
+                widget = QtWidgets.QComboBox()
+                widget.addItems(param.choices)
+                widget.setCurrentIndex(0)
+            if '_inputs' not in self.__dict__:
+                self._inputs = {}
+            self._inputs[param.name] = widget
+            return widget
+
+        #----------------------------------------------------------------------
+        def initAlgoLayout(self):
+            grid = QtWidgets.QGridLayout()
+            for i, param in enumerate(paramsForClass(algoClass).values()):
+                grid.addWidget(QtWidgets.QLabel(param.name), i, 0)
+
+                inputWidget = self._generateInputWidgetForParam(param)
+                grid.addWidget(inputWidget, i, 1)
+
+            return grid
+
+        #----------------------------------------------------------------------
+        def getAlgoSetting(self):
+            setting = OrderedDict()
+
+            setting['templateName'] = self.templateName
+            for name, param in paramsForClass(algoClass).items():
+                internalType = param.internalType
+                setting[name] = internalType(getWidgetText(self._inputs[name]))
+            return setting
+
+    return Widget