[2d466e4] | 1 | """ |
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| 2 | Widget for multi-model constraints. |
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| 3 | """ |
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| 4 | import os |
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| 5 | from numpy import * |
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| 6 | |
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| 7 | from PyQt5 import QtCore |
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| 8 | from PyQt5 import QtGui |
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| 9 | from PyQt5 import QtWidgets |
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| 10 | import webbrowser |
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| 11 | |
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| 12 | import sas.qtgui.Utilities.GuiUtils as GuiUtils |
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| 13 | ALLOWED_OPERATORS = ['=','<','>','>=','<='] |
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| 14 | |
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| 15 | # Local UI |
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| 16 | from sas.qtgui.Perspectives.Fitting.UI.ComplexConstraintUI import Ui_ComplexConstraintUI |
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[c5a2722f] | 17 | from sas.qtgui.Perspectives.Fitting.Constraints import Constraint |
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[2d466e4] | 18 | |
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| 19 | class ComplexConstraint(QtWidgets.QDialog, Ui_ComplexConstraintUI): |
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| 20 | def __init__(self, parent=None, tabs=None): |
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| 21 | super(ComplexConstraint, self).__init__() |
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| 22 | |
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| 23 | self.setupUi(self) |
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| 24 | self.setModal(True) |
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| 25 | |
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| 26 | # Useful globals |
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| 27 | self.tabs = tabs |
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| 28 | self.params = None |
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| 29 | self.tab_names = None |
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| 30 | self.operator = '=' |
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| 31 | |
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| 32 | self.setupData() |
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| 33 | self.setupWidgets() |
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| 34 | self.setupSignals() |
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[da9a0722] | 35 | self.setupTooltip() |
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[2d466e4] | 36 | |
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| 37 | self.setFixedSize(self.minimumSizeHint()) |
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| 38 | |
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| 39 | def setupData(self): |
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| 40 | """ |
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| 41 | Digs into self.tabs and pulls out relevant info |
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| 42 | """ |
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| 43 | self.tab_names = [tab.kernel_module.name for tab in self.tabs] |
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| 44 | self.params = [tab.getParamNames() for tab in self.tabs] |
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| 45 | pass |
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| 46 | |
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| 47 | def setupSignals(self): |
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| 48 | """ |
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| 49 | Signals from various elements |
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| 50 | """ |
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| 51 | self.cmdOK.clicked.connect(self.accept) |
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| 52 | self.cmdHelp.clicked.connect(self.onHelp) |
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| 53 | self.cmdRevert.clicked.connect(self.onRevert) |
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[c5a2722f] | 54 | self.txtConstraint.editingFinished.connect(self.validateFormula) |
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[2d466e4] | 55 | |
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| 56 | self.cbParam1.currentIndexChanged.connect(self.onParamIndexChange) |
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| 57 | self.cbParam2.currentIndexChanged.connect(self.onParamIndexChange) |
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| 58 | self.cbOperator.currentIndexChanged.connect(self.onOperatorChange) |
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| 59 | |
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| 60 | def setupWidgets(self): |
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| 61 | """ |
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| 62 | Setup widgets based on current parameters |
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| 63 | """ |
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| 64 | self.txtName1.setText(self.tab_names[0]) |
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| 65 | self.txtName2.setText(self.tab_names[1]) |
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| 66 | |
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[0764593] | 67 | # Show only parameters not already constrained |
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[2d466e4] | 68 | self.cbParam1.clear() |
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[0764593] | 69 | items = [param for i,param in enumerate(self.params[0]) if not self.tabs[0].rowHasConstraint(i)] |
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| 70 | self.cbParam1.addItems(items) |
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[2d466e4] | 71 | self.cbParam2.clear() |
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[0764593] | 72 | items = [param for i,param in enumerate(self.params[1]) if not self.tabs[1].rowHasConstraint(i)] |
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| 73 | self.cbParam2.addItems(items) |
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[2d466e4] | 74 | |
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| 75 | self.txtParam.setText(self.tab_names[0] + ":" + self.cbParam1.currentText()) |
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| 76 | |
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| 77 | self.cbOperator.clear() |
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| 78 | self.cbOperator.addItems(ALLOWED_OPERATORS) |
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| 79 | self.txtOperator.setText(self.cbOperator.currentText()) |
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| 80 | |
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| 81 | self.txtConstraint.setText(self.tab_names[1]+"."+self.cbParam2.currentText()) |
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| 82 | |
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| 83 | def setupTooltip(self): |
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| 84 | """ |
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| 85 | Tooltip for txtConstraint |
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| 86 | """ |
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[da9a0722] | 87 | p1 = self.tab_names[0] + ":" + self.cbParam1.currentText() |
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| 88 | p2 = self.tab_names[1]+"."+self.cbParam2.currentText() |
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| 89 | tooltip = "E.g.\n%s = 2.0 * (%s)\n" %(p1, p2) |
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| 90 | tooltip += "%s = sqrt(%s) + 5"%(p1, p2) |
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[2d466e4] | 91 | self.txtConstraint.setToolTip(tooltip) |
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| 92 | |
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| 93 | def onParamIndexChange(self, index): |
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| 94 | """ |
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| 95 | Respond to parameter combo box changes |
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| 96 | """ |
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| 97 | # Find out the signal source |
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| 98 | source = self.sender().objectName() |
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| 99 | if source == "cbParam1": |
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| 100 | self.txtParam.setText(self.tab_names[0] + ":" + self.cbParam1.currentText()) |
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| 101 | else: |
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[c5a2722f] | 102 | self.txtConstraint.setText(self.tab_names[1] + "." + self.cbParam2.currentText()) |
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[2d466e4] | 103 | pass |
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| 104 | |
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| 105 | def onOperatorChange(self, index): |
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| 106 | """ |
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| 107 | Respond to operator combo box changes |
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| 108 | """ |
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| 109 | self.txtOperator.setText(self.cbOperator.currentText()) |
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| 110 | |
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| 111 | def onRevert(self): |
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| 112 | """ |
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| 113 | switch M1 <-> M2 |
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| 114 | """ |
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| 115 | # Switch parameters |
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| 116 | self.params[1], self.params[0] = self.params[0], self.params[1] |
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| 117 | self.tab_names[1], self.tab_names[0] = self.tab_names[0], self.tab_names[1] |
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[0764593] | 118 | self.tabs[1], self.tabs[0] = self.tabs[0], self.tabs[1] |
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[2d466e4] | 119 | # Try to swap parameter names in the line edit |
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| 120 | current_text = self.txtConstraint.text() |
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| 121 | new_text = current_text.replace(self.cbParam1.currentText(), self.cbParam2.currentText()) |
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| 122 | self.txtConstraint.setText(new_text) |
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| 123 | # Update labels and tooltips |
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| 124 | index1 = self.cbParam1.currentIndex() |
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| 125 | index2 = self.cbParam2.currentIndex() |
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| 126 | indexOp = self.cbOperator.currentIndex() |
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| 127 | self.setupWidgets() |
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| 128 | |
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| 129 | # Original indices |
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| 130 | self.cbParam1.setCurrentIndex(index2) |
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| 131 | self.cbParam2.setCurrentIndex(index1) |
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| 132 | self.cbOperator.setCurrentIndex(indexOp) |
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[da9a0722] | 133 | self.setupTooltip() |
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[2d466e4] | 134 | |
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| 135 | def validateFormula(self): |
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| 136 | """ |
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| 137 | Add visual cues when formula is incorrect |
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| 138 | """ |
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| 139 | formula_is_valid = False |
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| 140 | formula_is_valid = self.validateConstraint(self.txtConstraint.text()) |
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| 141 | if not formula_is_valid: |
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| 142 | self.cmdOK.setEnabled(False) |
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| 143 | self.txtConstraint.setStyleSheet("QLineEdit {background-color: red;}") |
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| 144 | else: |
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| 145 | self.cmdOK.setEnabled(True) |
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| 146 | self.txtConstraint.setStyleSheet("QLineEdit {background-color: white;}") |
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| 147 | |
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| 148 | def validateConstraint(self, constraint_text): |
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| 149 | """ |
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| 150 | Ensure the constraint has proper form |
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| 151 | """ |
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| 152 | # 0. none or empty |
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| 153 | if not constraint_text or not isinstance(constraint_text, str): |
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| 154 | return False |
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| 155 | |
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[c5a2722f] | 156 | # M1.scale --> model_str='M1', constraint_text='scale' |
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| 157 | param_str = self.cbParam2.currentText() |
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[2d466e4] | 158 | constraint_text = constraint_text.strip() |
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[ba01ad1] | 159 | model_str = self.txtName2.text() |
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[c5a2722f] | 160 | |
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| 161 | # 0. Has to contain the model name |
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| 162 | if model_str != self.txtName2.text(): |
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| 163 | return False |
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| 164 | |
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[ba01ad1] | 165 | # Remove model name from constraint |
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[c5a2722f] | 166 | constraint_text = constraint_text.replace(model_str+".",'') |
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[2d466e4] | 167 | |
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| 168 | # 1. just the parameter |
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| 169 | if param_str == constraint_text: |
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| 170 | return True |
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| 171 | |
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| 172 | # 2. ensure the text contains parameter name |
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| 173 | parameter_string_start = constraint_text.find(param_str) |
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| 174 | if parameter_string_start < 0: |
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| 175 | return False |
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| 176 | parameter_string_end = parameter_string_start + len(param_str) |
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| 177 | |
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[c5a2722f] | 178 | # 3. replace parameter name with "1" and try to evaluate the expression |
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[2d466e4] | 179 | try: |
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| 180 | expression_to_evaluate = constraint_text.replace(param_str, "1.0") |
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| 181 | eval(expression_to_evaluate) |
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| 182 | except Exception: |
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| 183 | # Too many cases to cover individually, just a blanket |
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| 184 | # Exception should be sufficient |
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| 185 | # Note that in current numpy things like sqrt(-1) don't |
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| 186 | # raise but just return warnings |
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| 187 | return False |
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| 188 | |
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| 189 | return True |
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| 190 | |
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[c5a2722f] | 191 | def constraint(self): |
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| 192 | """ |
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| 193 | Return the generated constraint as tuple (model1, param1, operator, constraint) |
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| 194 | """ |
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| 195 | return (self.txtName1.text(), self.cbParam1.currentText(), self.cbOperator.currentText(), self.txtConstraint.text()) |
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| 196 | |
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[2d466e4] | 197 | def onHelp(self): |
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| 198 | """ |
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| 199 | Display related help section |
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| 200 | """ |
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| 201 | try: |
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| 202 | help_location = GuiUtils.HELP_DIRECTORY_LOCATION + \ |
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| 203 | "/user/sasgui/perspectives/fitting/fitting_help.html#simultaneous-fits-with-constraints" |
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| 204 | webbrowser.open('file://' + os.path.realpath(help_location)) |
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| 205 | except AttributeError: |
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| 206 | # No manager defined - testing and standalone runs |
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| 207 | pass |
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| 208 | |
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| 209 | |
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| 210 | |
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