class FeatureEditor(QFrame):
FUNCTIONS = dict(chain([(key, val) for key, val in math.__dict__.items()
if not key.startswith("_")],
[("str", str)]))
featureChanged = Signal()
featureEdited = Signal()
modifiedChanged = Signal(bool)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
layout = QFormLayout(
fieldGrowthPolicy=QFormLayout.ExpandingFieldsGrow
)
layout.setContentsMargins(0, 0, 0, 0)
self.nameedit = QLineEdit(
placeholderText="Name...",
sizePolicy=QSizePolicy(QSizePolicy.Minimum,
QSizePolicy.Fixed)
)
self.expressionedit = QLineEdit(
placeholderText="Expression..."
)
self.attrs_model = itemmodels.VariableListModel(
["Select Feature"], parent=self)
self.attributescb = QComboBox(
minimumContentsLength=16,
sizeAdjustPolicy=QComboBox.AdjustToMinimumContentsLengthWithIcon,
sizePolicy=QSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
)
self.attributescb.setModel(self.attrs_model)
sorted_funcs = sorted(self.FUNCTIONS)
self.funcs_model = itemmodels.PyListModelTooltip()
self.funcs_model.setParent(self)
self.funcs_model[:] = chain(["Select Function"], sorted_funcs)
self.funcs_model.tooltips[:] = chain(
[''],
[self.FUNCTIONS[func].__doc__ for func in sorted_funcs])
self.functionscb = QComboBox(
minimumContentsLength=16,
sizeAdjustPolicy=QComboBox.AdjustToMinimumContentsLengthWithIcon,
sizePolicy=QSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum))
self.functionscb.setModel(self.funcs_model)
hbox = QHBoxLayout()
hbox.addWidget(self.attributescb)
hbox.addWidget(self.functionscb)
layout.addRow(self.nameedit, self.expressionedit)
layout.addRow(self.tr(""), hbox)
self.setLayout(layout)
self.nameedit.editingFinished.connect(self._invalidate)
self.expressionedit.textChanged.connect(self._invalidate)
self.attributescb.currentIndexChanged.connect(self.on_attrs_changed)
self.functionscb.currentIndexChanged.connect(self.on_funcs_changed)
self._modified = False
def setModified(self, modified):
if not type(modified) is bool:
raise TypeError
if self._modified != modified:
self._modified = modified
self.modifiedChanged.emit(modified)
def modified(self):
return self._modified
modified = Property(bool, modified, setModified,
notify=modifiedChanged)
def setEditorData(self, data, domain):
self.nameedit.setText(data.name)
self.expressionedit.setText(data.expression)
self.setModified(False)
self.featureChanged.emit()
self.attrs_model[:] = ["Select Feature"]
if domain is not None and (domain or domain.metas):
self.attrs_model[:] += chain(domain.attributes,
domain.class_vars,
domain.metas)
def editorData(self):
return FeatureDescriptor(name=self.nameedit.text(),
expression=self.nameedit.text())
def _invalidate(self):
self.setModified(True)
self.featureEdited.emit()
self.featureChanged.emit()
def on_attrs_changed(self):
index = self.attributescb.currentIndex()
if index > 0:
attr = sanitized_name(self.attrs_model[index].name)
self.insert_into_expression(attr)
self.attributescb.setCurrentIndex(0)
def on_funcs_changed(self):
index = self.functionscb.currentIndex()
if index > 0:
func = self.funcs_model[index]
if func in ["atan2", "fmod", "ldexp", "log",
"pow", "copysign", "hypot"]:
self.insert_into_expression(func + "(,)")
self.expressionedit.cursorBackward(False, 2)
elif func in ["e", "pi"]:
self.insert_into_expression(func)
else:
self.insert_into_expression(func + "()")
self.expressionedit.cursorBackward(False)
self.functionscb.setCurrentIndex(0)
def insert_into_expression(self, what):
cp = self.expressionedit.cursorPosition()
ct = self.expressionedit.text()
text = ct[:cp] + what + ct[cp:]
self.expressionedit.setText(text)
self.expressionedit.setFocus()
class FeatureEditor(QFrame):
FUNCTIONS = dict(chain([(key, val) for key, val in math.__dict__.items()
if not key.startswith("_")],
[(key, val) for key, val in builtins.__dict__.items()
if key in {"str", "float", "int", "len",
"abs", "max", "min"}]))
featureChanged = Signal()
featureEdited = Signal()
modifiedChanged = Signal(bool)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
layout = QFormLayout(
fieldGrowthPolicy=QFormLayout.ExpandingFieldsGrow
)
layout.setContentsMargins(0, 0, 0, 0)
self.nameedit = QLineEdit(
placeholderText="Name...",
sizePolicy=QSizePolicy(QSizePolicy.Minimum,
QSizePolicy.Fixed)
)
self.expressionedit = QLineEdit(
placeholderText="Expression..."
)
self.attrs_model = itemmodels.VariableListModel(
["Select Feature"], parent=self)
self.attributescb = QComboBox(
minimumContentsLength=16,
sizeAdjustPolicy=QComboBox.AdjustToMinimumContentsLengthWithIcon,
sizePolicy=QSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
)
self.attributescb.setModel(self.attrs_model)
sorted_funcs = sorted(self.FUNCTIONS)
self.funcs_model = itemmodels.PyListModelTooltip()
self.funcs_model.setParent(self)
self.funcs_model[:] = chain(["Select Function"], sorted_funcs)
self.funcs_model.tooltips[:] = chain(
[''],
[self.FUNCTIONS[func].__doc__ for func in sorted_funcs])
self.functionscb = QComboBox(
minimumContentsLength=16,
sizeAdjustPolicy=QComboBox.AdjustToMinimumContentsLengthWithIcon,
sizePolicy=QSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum))
self.functionscb.setModel(self.funcs_model)
hbox = QHBoxLayout()
hbox.addWidget(self.attributescb)
hbox.addWidget(self.functionscb)
layout.addRow(self.nameedit, self.expressionedit)
layout.addRow(self.tr(""), hbox)
self.setLayout(layout)
self.nameedit.editingFinished.connect(self._invalidate)
self.expressionedit.textChanged.connect(self._invalidate)
self.attributescb.currentIndexChanged.connect(self.on_attrs_changed)
self.functionscb.currentIndexChanged.connect(self.on_funcs_changed)
self._modified = False
def setModified(self, modified):
if not type(modified) is bool:
raise TypeError
if self._modified != modified:
self._modified = modified
self.modifiedChanged.emit(modified)
def modified(self):
return self._modified
modified = Property(bool, modified, setModified,
notify=modifiedChanged)
def setEditorData(self, data, domain):
self.nameedit.setText(data.name)
self.expressionedit.setText(data.expression)
self.setModified(False)
self.featureChanged.emit()
self.attrs_model[:] = ["Select Feature"]
if domain is not None and (domain or domain.metas):
self.attrs_model[:] += chain(domain.attributes,
domain.class_vars,
domain.metas)
def editorData(self):
return FeatureDescriptor(name=self.nameedit.text(),
expression=self.nameedit.text())
def _invalidate(self):
self.setModified(True)
self.featureEdited.emit()
self.featureChanged.emit()
def on_attrs_changed(self):
index = self.attributescb.currentIndex()
if index > 0:
attr = sanitized_name(self.attrs_model[index].name)
self.insert_into_expression(attr)
self.attributescb.setCurrentIndex(0)
def on_funcs_changed(self):
index = self.functionscb.currentIndex()
if index > 0:
func = self.funcs_model[index]
if func in ["atan2", "fmod", "ldexp", "log",
"pow", "copysign", "hypot"]:
self.insert_into_expression(func + "(,)")
self.expressionedit.cursorBackward(False, 2)
elif func in ["e", "pi"]:
self.insert_into_expression(func)
else:
self.insert_into_expression(func + "()")
self.expressionedit.cursorBackward(False)
self.functionscb.setCurrentIndex(0)
def insert_into_expression(self, what):
cp = self.expressionedit.cursorPosition()
ct = self.expressionedit.text()
text = ct[:cp] + what + ct[cp:]
self.expressionedit.setText(text)
self.expressionedit.setFocus()
