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variables.py
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variables.py
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import sys
import vaex
import vaex.ui.qt as dialogs
from vaex.ui.qt import *
import logging
from vaex.ui.icons import iconfile
logger = logging.getLogger("vaex.ui.variables")
class VariablesTableModel(QtCore.QAbstractTableModel):
def __init__(self, dataset, parent=None, *args):
"""
:type dataset: Dataset
"""
QtCore.QAbstractTableModel.__init__(self, parent, *args)
self.dataset = dataset
self.row_count_start = 1
# self.table_column_names = ["Type", "Name", "Value"]
self.table_column_names = ["Name", "Expression", "Value"]
# self.show_virtual = True
def get_dataset_column_names(self):
return list(self.dataset.variables.keys())
def rowCount(self, parent):
column_names = self.get_dataset_column_names()
return len(column_names)
def columnCount(self, parent):
return len(self.table_column_names) + 1
def setData(self, index, value, role=QtCore.Qt.EditRole):
row = index.row()
column_index = index.column() - 1
variable_name = self.get_dataset_column_names()[row]
property = self.table_column_names[column_index]
# print index, value, role
# if property == "Visible":
# logger.debug("set visibility to: %s", value == QtCore.Qt.Checked)
# if property == "Description":
# self.dataset.descriptions[column_name] = value
# if property == "UCD":
# self.dataset.ucds[column_name] = value
# # TODO: move to dataset class
# self.dataset.signal_column_changed.emit(self.dataset, column_name, "change")
# if property == "Units":
# if value:
# try:
# unit = astropy.units.Unit(value)
# logger.debug("setting unit to: %s (%s)" % (value, unit))
# self.dataset.units[column_name] = unit
# # TODO: move to dataset class
# self.dataset.signal_column_changed.emit(self.dataset, column_name, "change")
# except Exception, e:
# dialogs.dialog_error(None, "Cannot parse unit", "Cannot parse unit:\n %s" % e)
# else:
# if column_name in self.dataset.units:
# del self.dataset.units[column_name]
if property == "Expression":
try:
test = eval(value, vaex.dataset.expression_namespace, self.dataset.variables)
self.dataset.add_variable(variable_name, value)
except Exception as e:
dialogs.dialog_error(None, "Invalid expression", "Invalid expression: %s" % e)
# although it may not be a valid expression, still set it to the user can edit it
# self.dataset.virtual_columns[column_name] = value
self.dataset.write_meta()
return True
def data(self, index, role=QtCore.Qt.DisplayRole):
# row_offset = self.get_row_offset()
# print index, role
if not index.isValid():
return None
if 0: # role == QtCore.Qt.CheckStateRole and index.column() == 0:
return QtCore.Qt.Checked
elif role not in [QtCore.Qt.DisplayRole, QtCore.Qt.EditRole]:
return None
if index.column() == 0:
# return "{:,}".format(index.row()+self.row_count_start + row_offset)
return str(index.row() + self.row_count_start)
else:
row = index.row()
column_index = index.column() - 1
variable_name = self.get_dataset_column_names()[row]
property = self.table_column_names[column_index]
# column = None
# if column_name in self.dataset.get_column_names():
# column = self.dataset.columns[column_name]
# if property == "Visible":
# return QtCore.Qt.Checked
if property == "Name":
return variable_name
elif property == "Type":
if column_name in self.dataset.get_column_names():
return str(self.dataset.dtype(column_name))
else:
return "virtual column"
elif property == "Units":
unit = self.dataset.unit(column_name)
return str(unit) if unit else ""
elif property == "UCD":
return self.dataset.ucds.get(column_name, "")
elif property == "Description":
return self.dataset.descriptions.get(column_name, "")
elif property == "Value":
# return str(self.dataset.variables[variable_name])
try:
return str(self.dataset.evaluate_variable(variable_name))
except Exception as e:
# dialogs.dialog_error(None, "Invalid expression", "Invalid expression: %s" % e)
return "Error in expression: %s" % e
elif property == "Expression":
return str(self.dataset.variables[variable_name])
def flags(self, index):
row = index.row()
column_index = index.column() - 1
if column_index == 0:
return QtCore.Qt.ItemIsUserCheckable | QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled
column_name = self.get_dataset_column_names()[row]
property = self.table_column_names[column_index]
column = None
flags = QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled
if property in ["Expression", "Description", "Units", "UCD"]:
flags |= QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsSelectable
# if column_name in self.dataset.virtual_columns:
else:
flags |= QtCore.Qt.ItemIsSelectable
return flags
def headerData(self, index, orientation, role):
# row_offset = self.get_row_offset()
if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
if index == 0:
return ""
else:
return self.table_column_names[index - 1]
# if orientation == QtCore.Qt.Vertical and role == QtCore.Qt.DisplayRole:
# return str(index+self.row_count_start + row_offset)
return None
def insertRows(self, *args):
return True
class VariablesTable(QtGui.QWidget):
def set_dataset(self, dataset):
if self.event_handler:
self.dataset.signal_variable_changed.disconnect(self.event_handler)
self.dataset = dataset
self.tableModel = VariablesTableModel(self.dataset, self)
self.tableView.setModel(self.tableModel)
self.tableView.selectionModel().currentChanged.connect(self.onCurrentChanged)
self.tableView.resizeColumnsToContents()
# self.tableView.horizontalHeader().setResizeMode(QtGui.QHeaderView.Stretch);
self.tableView.horizontalHeader().setStretchLastSection(True)
self.event_handler = self.dataset.signal_variable_changed.connect(self.on_variable_change)
def on_variable_change(self, *args):
self.reset()
pass
def __init__(self, parent, menu=None):
super(VariablesTable, self).__init__(parent)
# dataset.add_virtual_column("xp", "x")
self.event_handler = None
self.resize(700, 500)
self.tableView = QtGui.QTableView()
# self.tableView.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows);
# self.header = self.dataset.column_names
# self.tableView.pressed.connect(self.onSelectRow)
if qt_mayor == 5:
self.tableView.verticalHeader().setSectionResizeMode(QtGui.QHeaderView.Interactive)
else:
self.tableView.verticalHeader().setResizeMode(QtGui.QHeaderView.Interactive)
# self.unit_delegate = vaex.ui.completer.UnitDelegate(self.tableView)
# self.ucd_delegate = vaex.ui.completer.UCDDelegate(self.tableView)
# self.tableView.setItemDelegateForColumn(4, self.unit_delegate)
# self.tableView.setItemDelegateForColumn(5, self.ucd_delegate)
self.toolbar = QtGui.QToolBar(self)
# self.description = QtGui.QTextEdit(self.dataset.description, self)
# self.description.setFixedHeight(100)
# self.description.textChanged.connect(self.onTextChanged)
# self.action_group_add = QtGui.QActionGroup(self)
self.action_add = QtGui.QAction(QtGui.QIcon(iconfile('table-insert-column')), 'Add variable', self)
self.action_remove = QtGui.QAction(QtGui.QIcon(iconfile('table-delete-column')), 'Remove variable', self)
self.action_remove.setEnabled(False)
self.action_add.setShortcut("Ctrl+Alt++")
self.action_remove.setShortcut("Ctrl+Alt+-")
self.toolbar.addAction(self.action_add)
self.toolbar.addAction(self.action_remove)
if 0:
self.action_add_menu = QtGui.QMenu()
self.action_add.setMenu(self.action_add_menu)
self.action_celestial = QtGui.QAction(QtGui.QIcon(iconfile('table-insert-column')), 'Equatorial to galactic', self)
self.action_celestial.setShortcut("Ctrl+G")
self.action_add.menu().addAction(self.action_celestial)
self.action_celestial.triggered.connect(lambda *args: add_celestial(self, self.dataset))
self.action_car_to_gal = QtGui.QAction(QtGui.QIcon(iconfile('table-insert-column')), 'Cartesian to galactic', self)
self.action_car_to_gal.setShortcut("Ctrl+S")
self.action_add.menu().addAction(self.action_car_to_gal)
self.action_car_to_gal.triggered.connect(lambda *args: add_sky(self, self.dataset, True))
self.action_par_to_dis = QtGui.QAction(QtGui.QIcon(iconfile('table-insert-column')), 'Parallax to distance', self)
self.action_par_to_dis.setShortcut("Ctrl+D")
self.action_add.menu().addAction(self.action_par_to_dis)
self.action_par_to_dis.triggered.connect(lambda *args: add_distance(self, self.dataset))
self.action_gal_to_car = QtGui.QAction(QtGui.QIcon(iconfile('table-insert-column')), 'Galactic to cartesian', self)
self.action_gal_to_car.setShortcut("Ctrl+C")
self.action_add.menu().addAction(self.action_gal_to_car)
self.action_gal_to_car.triggered.connect(lambda *args: add_cartesian(self, self.dataset, True))
self.action_gal_to_aitoff = QtGui.QAction(QtGui.QIcon(iconfile('table-insert-column')), 'Galactic to Aitoff projection', self)
self.action_gal_to_aitoff.setShortcut("Ctrl+A")
self.action_add.menu().addAction(self.action_gal_to_aitoff)
self.action_gal_to_aitoff.triggered.connect(lambda *args: add_aitoff(self, self.dataset, True))
# action_group_add.add(self.action_add)
self.action_add.triggered.connect(self.onAdd)
self.action_remove.triggered.connect(self.onRemove)
if menu:
menu.addAction(self.action_add)
menu.addAction(self.action_remove)
# self.tableView.pressed.connect(self.onSelectRow)
# self.tableView.activated.connect(self.onActivateRow)
# self.tableView.selectionModel().currentChanged.connect(self.onCurrentChanged)
self.boxlayout = QtGui.QVBoxLayout(self)
self.boxlayout.addWidget(self.toolbar, 0)
# self.boxlayout.addWidget(self.description, 0)
self.boxlayout.addWidget(self.tableView, 1)
self.setLayout(self.boxlayout)
self.tableView.resizeColumnsToContents()
# self.tableView.horizontalHeader().setResizeMode(QtGui.QHeaderView.Stretch);
self.tableView.horizontalHeader().setStretchLastSection(True)
def onTextChanged(self, *args):
self.dataset.description = self.description.toPlainText()
logger.debug("setting description to: %s", self.dataset.description)
self.dataset.write_meta()
def onSelectRow(self, model):
row_index = model.row()
logger.debug("row index selected %d" % row_index)
def onCurrentChanged(self, model, previous):
# row_index = model.row()
# logger.debug("row index activated %d" % row_index)
self.check_remove()
def check_remove(self):
model = self.tableView.selectionModel().currentIndex()
column_names = self.tableModel.get_dataset_column_names()
column_name = column_names[model.row()]
self.action_remove.setEnabled(column_name not in ["e", "pi"])
def onRemove(self, _=None):
model = self.tableView.selectionModel().currentIndex()
column_names = self.tableModel.get_dataset_column_names()
column_name = column_names[model.row()]
logger.debug("removing %s", column_name)
# del self.dataset.virtual_columns[column_name]
self.dataset.delete_variable(column_name)
# self.reset()
self.check_remove()
def reset(self):
self.tableModel.beginResetModel()
self.tableView.reset()
self.tableModel.endResetModel()
def onAdd(self, _=None):
dialog = dialogs.QuickDialog(self, title="Add variable")
dialog.add_text("name", "Variable name", make_unique("var", self.dataset))
dialog.add_variable_expression("expression", "Expression", "e**-1+sin(pi)", self.dataset)
# dialog.add_unit("unit", "Expression", "sqrt(%s)" % self.dataset.get_column_names()[0], self.dataset)
# dialog.add_ucd("ucd", "UCD", "")
# dialog.add_text("description", "Description", placeholder="Enter a description")
values = dialog.get()
if values:
# if values["description"]:
# self.dataset.descriptions[values["name"]] = values["description"]
# if values["ucd"]:
# self.dataset.ucds[values["name"]] = values["ucd"]
self.dataset.add_variable(values["name"], values["expression"])
def make_unique(name, dataset):
postfix = ""
number = 2
original_name = name
while name in dataset.get_column_names(virtual=True):
name = original_name + "_" + str(number)
number += 1
return name
def main(argv=sys.argv):
dataset = vaex.open(argv[1])
app = QtGui.QApplication(argv)
table = VariablesTable(None)
table.set_dataset(dataset)
table.show()
table.raise_()
sys.exit(app.exec_())
if __name__ == "__main__":
vaex.set_log_level_debug()
main()
for i in range(3):
for j in range(3):
dataset.add_virtual_column("bla_%s%s" % (i, j), expr_matrix[i, j])
dataset.add_virtual_columns_matrix3d("vx", "vy", "vz", "mu_alpha", "mu_delta", "vr", "bla")