class OWSelectAttributes(widget.OWWidget):
    name = "Select Columns"
    description = "Select columns from the data table and assign them to " \
                  "data features, classes or meta variables."
    icon = "icons/SelectColumns.svg"
    priority = 100

    class Inputs:
        data = Input("Data", Table)

    class Outputs:
        data = Output("Data", Table)
        features = Output("Features", widget.AttributeList, dynamic=False)

    want_main_area = False
    want_control_area = True

    settingsHandler = SelectAttributesDomainContextHandler()
    domain_role_hints = ContextSetting({})
    auto_commit = Setting(True)

    def __init__(self):
        super().__init__()
        self.controlArea = QWidget(self.controlArea)
        self.layout().addWidget(self.controlArea)
        layout = QGridLayout()
        self.controlArea.setLayout(layout)
        layout.setContentsMargins(4, 4, 4, 4)
        box = gui.vBox(self.controlArea,
                       "Available Variables",
                       addToLayout=False)
        self.filter_edit = QLineEdit()
        self.filter_edit.setToolTip("Filter the list of available variables.")
        box.layout().addWidget(self.filter_edit)
        if hasattr(self.filter_edit, "setPlaceholderText"):
            self.filter_edit.setPlaceholderText("Filter")

        self.completer = QCompleter()
        self.completer.setCompletionMode(QCompleter.InlineCompletion)
        self.completer_model = QStringListModel()
        self.completer.setModel(self.completer_model)
        self.completer.setModelSorting(QCompleter.CaseSensitivelySortedModel)

        self.filter_edit.setCompleter(self.completer)
        self.completer_navigator = CompleterNavigator(self)
        self.filter_edit.installEventFilter(self.completer_navigator)

        def dropcompleted(action):
            if action == Qt.MoveAction:
                self.commit()

        self.available_attrs = VariableListModel(enable_dnd=True)
        self.available_attrs_proxy = VariableFilterProxyModel()
        self.available_attrs_proxy.setSourceModel(self.available_attrs)
        self.available_attrs_view = VariablesListItemView(
            acceptedType=Orange.data.Variable)
        self.available_attrs_view.setModel(self.available_attrs_proxy)

        aa = self.available_attrs
        aa.dataChanged.connect(self.update_completer_model)
        aa.rowsInserted.connect(self.update_completer_model)
        aa.rowsRemoved.connect(self.update_completer_model)

        self.available_attrs_view.selectionModel().selectionChanged.connect(
            partial(self.update_interface_state, self.available_attrs_view))
        self.available_attrs_view.dragDropActionDidComplete.connect(
            dropcompleted)
        self.filter_edit.textChanged.connect(self.update_completer_prefix)
        self.filter_edit.textChanged.connect(
            self.available_attrs_proxy.set_filter_string)

        box.layout().addWidget(self.available_attrs_view)
        layout.addWidget(box, 0, 0, 3, 1)

        box = gui.vBox(self.controlArea, "Features", addToLayout=False)
        self.used_attrs = VariableListModel(enable_dnd=True)
        self.used_attrs_view = VariablesListItemView(
            acceptedType=(Orange.data.DiscreteVariable,
                          Orange.data.ContinuousVariable))

        self.used_attrs_view.setModel(self.used_attrs)
        self.used_attrs_view.selectionModel().selectionChanged.connect(
            partial(self.update_interface_state, self.used_attrs_view))
        self.used_attrs_view.dragDropActionDidComplete.connect(dropcompleted)
        box.layout().addWidget(self.used_attrs_view)
        layout.addWidget(box, 0, 2, 1, 1)

        box = gui.vBox(self.controlArea, "Target Variable", addToLayout=False)
        self.class_attrs = ClassVarListItemModel(enable_dnd=True)
        self.class_attrs_view = ClassVariableItemView(
            acceptedType=(Orange.data.DiscreteVariable,
                          Orange.data.ContinuousVariable))
        self.class_attrs_view.setModel(self.class_attrs)
        self.class_attrs_view.selectionModel().selectionChanged.connect(
            partial(self.update_interface_state, self.class_attrs_view))
        self.class_attrs_view.dragDropActionDidComplete.connect(dropcompleted)
        self.class_attrs_view.setMaximumHeight(72)
        box.layout().addWidget(self.class_attrs_view)
        layout.addWidget(box, 1, 2, 1, 1)

        box = gui.vBox(self.controlArea, "Meta Attributes", addToLayout=False)
        self.meta_attrs = VariableListModel(enable_dnd=True)
        self.meta_attrs_view = VariablesListItemView(
            acceptedType=Orange.data.Variable)
        self.meta_attrs_view.setModel(self.meta_attrs)
        self.meta_attrs_view.selectionModel().selectionChanged.connect(
            partial(self.update_interface_state, self.meta_attrs_view))
        self.meta_attrs_view.dragDropActionDidComplete.connect(dropcompleted)
        box.layout().addWidget(self.meta_attrs_view)
        layout.addWidget(box, 2, 2, 1, 1)

        bbox = gui.vBox(self.controlArea, addToLayout=False, margin=0)
        layout.addWidget(bbox, 0, 1, 1, 1)

        self.up_attr_button = gui.button(bbox,
                                         self,
                                         "Up",
                                         callback=partial(
                                             self.move_up,
                                             self.used_attrs_view))
        self.move_attr_button = gui.button(bbox,
                                           self,
                                           ">",
                                           callback=partial(
                                               self.move_selected,
                                               self.used_attrs_view))
        self.down_attr_button = gui.button(bbox,
                                           self,
                                           "Down",
                                           callback=partial(
                                               self.move_down,
                                               self.used_attrs_view))

        bbox = gui.vBox(self.controlArea, addToLayout=False, margin=0)
        layout.addWidget(bbox, 1, 1, 1, 1)

        self.up_class_button = gui.button(bbox,
                                          self,
                                          "Up",
                                          callback=partial(
                                              self.move_up,
                                              self.class_attrs_view))
        self.move_class_button = gui.button(bbox,
                                            self,
                                            ">",
                                            callback=partial(
                                                self.move_selected,
                                                self.class_attrs_view,
                                                exclusive=False))
        self.down_class_button = gui.button(bbox,
                                            self,
                                            "Down",
                                            callback=partial(
                                                self.move_down,
                                                self.class_attrs_view))

        bbox = gui.vBox(self.controlArea, addToLayout=False, margin=0)
        layout.addWidget(bbox, 2, 1, 1, 1)
        self.up_meta_button = gui.button(bbox,
                                         self,
                                         "Up",
                                         callback=partial(
                                             self.move_up,
                                             self.meta_attrs_view))
        self.move_meta_button = gui.button(bbox,
                                           self,
                                           ">",
                                           callback=partial(
                                               self.move_selected,
                                               self.meta_attrs_view))
        self.down_meta_button = gui.button(bbox,
                                           self,
                                           "Down",
                                           callback=partial(
                                               self.move_down,
                                               self.meta_attrs_view))

        autobox = gui.auto_commit(None, self, "auto_commit", "Send")
        layout.addWidget(autobox, 3, 0, 1, 3)
        reset = gui.button(None, self, "Reset", callback=self.reset)
        autobox.layout().insertWidget(0, self.report_button)
        autobox.layout().insertWidget(1, reset)
        autobox.layout().insertSpacing(2, 10)
        reset.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
        self.report_button.setSizePolicy(QSizePolicy.Expanding,
                                         QSizePolicy.Preferred)

        layout.setRowStretch(0, 4)
        layout.setRowStretch(1, 0)
        layout.setRowStretch(2, 2)
        layout.setHorizontalSpacing(0)
        self.controlArea.setLayout(layout)

        self.data = None
        self.output_data = None
        self.original_completer_items = []

        self.resize(500, 600)

    @Inputs.data
    def set_data(self, data=None):
        self.update_domain_role_hints()
        self.closeContext()
        self.data = data
        if data is not None:
            self.openContext(data)
            all_vars = data.domain.variables + data.domain.metas

            var_sig = lambda attr: (attr.name, vartype(attr))

            domain_hints = {
                var_sig(attr): ("attribute", i)
                for i, attr in enumerate(data.domain.attributes)
            }

            domain_hints.update({
                var_sig(attr): ("meta", i)
                for i, attr in enumerate(data.domain.metas)
            })

            if data.domain.class_vars:
                domain_hints.update({
                    var_sig(attr): ("class", i)
                    for i, attr in enumerate(data.domain.class_vars)
                })

            # update the hints from context settings
            domain_hints.update(self.domain_role_hints)

            attrs_for_role = lambda role: [
                (domain_hints[var_sig(attr)][1], attr) for attr in all_vars
                if domain_hints[var_sig(attr)][0] == role
            ]

            attributes = [
                attr for place, attr in sorted(attrs_for_role("attribute"),
                                               key=lambda a: a[0])
            ]
            classes = [
                attr for place, attr in sorted(attrs_for_role("class"),
                                               key=lambda a: a[0])
            ]
            metas = [
                attr for place, attr in sorted(attrs_for_role("meta"),
                                               key=lambda a: a[0])
            ]
            available = [
                attr for place, attr in sorted(attrs_for_role("available"),
                                               key=lambda a: a[0])
            ]

            self.used_attrs[:] = attributes
            self.class_attrs[:] = classes
            self.meta_attrs[:] = metas
            self.available_attrs[:] = available
        else:
            self.used_attrs[:] = []
            self.class_attrs[:] = []
            self.meta_attrs[:] = []
            self.available_attrs[:] = []

        self.unconditional_commit()

    def update_domain_role_hints(self):
        """ Update the domain hints to be stored in the widgets settings.
        """
        hints_from_model = lambda role, model: [(
            (attr.name, vartype(attr)),
            (role, i)) for i, attr in enumerate(model)]
        hints = dict(hints_from_model("available", self.available_attrs))
        hints.update(hints_from_model("attribute", self.used_attrs))
        hints.update(hints_from_model("class", self.class_attrs))
        hints.update(hints_from_model("meta", self.meta_attrs))
        self.domain_role_hints = hints

    def selected_rows(self, view):
        """ Return the selected rows in the view.
        """
        rows = view.selectionModel().selectedRows()
        model = view.model()
        if isinstance(model, QSortFilterProxyModel):
            rows = [model.mapToSource(r) for r in rows]
        return [r.row() for r in rows]

    def move_rows(self, view, rows, offset):
        model = view.model()
        newrows = [min(max(0, row + offset), len(model) - 1) for row in rows]

        for row, newrow in sorted(zip(rows, newrows), reverse=offset > 0):
            model[row], model[newrow] = model[newrow], model[row]

        selection = QItemSelection()
        for nrow in newrows:
            index = model.index(nrow, 0)
            selection.select(index, index)
        view.selectionModel().select(selection,
                                     QItemSelectionModel.ClearAndSelect)

        self.commit()

    def move_up(self, view):
        selected = self.selected_rows(view)
        self.move_rows(view, selected, -1)

    def move_down(self, view):
        selected = self.selected_rows(view)
        self.move_rows(view, selected, 1)

    def move_selected(self, view, exclusive=False):
        if self.selected_rows(view):
            self.move_selected_from_to(view, self.available_attrs_view)
        elif self.selected_rows(self.available_attrs_view):
            self.move_selected_from_to(self.available_attrs_view, view,
                                       exclusive)

    def move_selected_from_to(self, src, dst, exclusive=False):
        self.move_from_to(src, dst, self.selected_rows(src), exclusive)

    def move_from_to(self, src, dst, rows, exclusive=False):
        src_model = source_model(src)
        attrs = [src_model[r] for r in rows]

        for s1, s2 in reversed(list(slices(rows))):
            del src_model[s1:s2]

        dst_model = source_model(dst)

        dst_model.extend(attrs)

        self.commit()

    def update_interface_state(self,
                               focus=None,
                               selected=None,
                               deselected=None):
        for view in [
                self.available_attrs_view, self.used_attrs_view,
                self.class_attrs_view, self.meta_attrs_view
        ]:
            if view is not focus and not view.hasFocus(
            ) and self.selected_rows(view):
                view.selectionModel().clear()

        def selected_vars(view):
            model = source_model(view)
            return [model[i] for i in self.selected_rows(view)]

        available_selected = selected_vars(self.available_attrs_view)
        attrs_selected = selected_vars(self.used_attrs_view)
        class_selected = selected_vars(self.class_attrs_view)
        meta_selected = selected_vars(self.meta_attrs_view)

        available_types = set(map(type, available_selected))
        all_primitive = all(var.is_primitive() for var in available_types)

        move_attr_enabled = (available_selected and all_primitive) or \
                            attrs_selected

        self.move_attr_button.setEnabled(bool(move_attr_enabled))
        if move_attr_enabled:
            self.move_attr_button.setText(">" if available_selected else "<")

        move_class_enabled = (all_primitive
                              and available_selected) or class_selected

        self.move_class_button.setEnabled(bool(move_class_enabled))
        if move_class_enabled:
            self.move_class_button.setText(">" if available_selected else "<")
        move_meta_enabled = available_selected or meta_selected

        self.move_meta_button.setEnabled(bool(move_meta_enabled))
        if move_meta_enabled:
            self.move_meta_button.setText(">" if available_selected else "<")

    def update_completer_model(self, *_):
        """ This gets called when the model for available attributes changes
        through either drag/drop or the left/right button actions.

        """
        vars = list(self.available_attrs)
        items = [var.name for var in vars]
        items += [
            "%s=%s" % item for v in vars for item in v.attributes.items()
        ]

        new = sorted(set(items))
        if new != self.original_completer_items:
            self.original_completer_items = new
            self.completer_model.setStringList(self.original_completer_items)

    def update_completer_prefix(self, filter):
        """ Prefixes all items in the completer model with the current
        already done completion to enable the completion of multiple keywords.
        """
        prefix = str(self.completer.completionPrefix())
        if not prefix.endswith(" ") and " " in prefix:
            prefix, _ = prefix.rsplit(" ", 1)
            items = [
                prefix + " " + item for item in self.original_completer_items
            ]
        else:
            items = self.original_completer_items
        old = list(map(str, self.completer_model.stringList()))

        if set(old) != set(items):
            self.completer_model.setStringList(items)

    def commit(self):
        self.update_domain_role_hints()
        if self.data is not None:
            attributes = list(self.used_attrs)
            class_var = list(self.class_attrs)
            metas = list(self.meta_attrs)

            domain = Orange.data.Domain(attributes, class_var, metas)
            newdata = self.data.transform(domain)
            self.output_data = newdata
            self.Outputs.data.send(newdata)
            self.Outputs.features.send(widget.AttributeList(attributes))
        else:
            self.output_data = None
            self.Outputs.data.send(None)
            self.Outputs.features.send(None)

    def reset(self):
        if self.data is not None:
            self.available_attrs[:] = []
            self.used_attrs[:] = self.data.domain.attributes
            self.class_attrs[:] = self.data.domain.class_vars
            self.meta_attrs[:] = self.data.domain.metas
            self.update_domain_role_hints()
            self.commit()

    def send_report(self):
        if not self.data or not self.output_data:
            return
        in_domain, out_domain = self.data.domain, self.output_data.domain
        self.report_domain("Input data", self.data.domain)
        if (in_domain.attributes, in_domain.class_vars,
                in_domain.metas) == (out_domain.attributes,
                                     out_domain.class_vars, out_domain.metas):
            self.report_paragraph("Output data", "No changes.")
        else:
            self.report_domain("Output data", self.output_data.domain)
            diff = list(
                set(in_domain.variables + in_domain.metas) -
                set(out_domain.variables + out_domain.metas))
            if diff:
                text = "%i (%s)" % (len(diff), ", ".join(x.name for x in diff))
                self.report_items((("Removed", text), ))
Exemplo n.º 2
0
class OWSelectAttributes(widget.OWWidget):
    name = "Select Columns"
    description = "Select columns from the data table and assign them to " \
                  "data features, classes or meta variables."
    icon = "icons/SelectColumns.svg"
    priority = 100
    inputs = [("Data", Table, "set_data")]
    outputs = [("Data", Table), ("Features", widget.AttributeList)]

    want_main_area = False
    want_control_area = True

    settingsHandler = SelectAttributesDomainContextHandler()
    domain_role_hints = ContextSetting({})
    auto_commit = Setting(False)

    def __init__(self):
        super().__init__()
        self.controlArea = QWidget(self.controlArea)
        self.layout().addWidget(self.controlArea)
        layout = QGridLayout()
        self.controlArea.setLayout(layout)
        layout.setContentsMargins(4, 4, 4, 4)
        box = gui.vBox(self.controlArea, "Available Variables",
                       addToLayout=False)
        self.filter_edit = QLineEdit()
        self.filter_edit.setToolTip("Filter the list of available variables.")
        box.layout().addWidget(self.filter_edit)
        if hasattr(self.filter_edit, "setPlaceholderText"):
            self.filter_edit.setPlaceholderText("Filter")

        self.completer = QCompleter()
        self.completer.setCompletionMode(QCompleter.InlineCompletion)
        self.completer_model = QStringListModel()
        self.completer.setModel(self.completer_model)
        self.completer.setModelSorting(
            QCompleter.CaseSensitivelySortedModel)

        self.filter_edit.setCompleter(self.completer)
        self.completer_navigator = CompleterNavigator(self)
        self.filter_edit.installEventFilter(self.completer_navigator)

        def dropcompleted(action):
            if action == Qt.MoveAction:
                self.commit()

        self.available_attrs = VariableListModel(enable_dnd=True)
        self.available_attrs_proxy = VariableFilterProxyModel()
        self.available_attrs_proxy.setSourceModel(self.available_attrs)
        self.available_attrs_view = VariablesListItemView(
            acceptedType=Orange.data.Variable)
        self.available_attrs_view.setModel(self.available_attrs_proxy)

        aa = self.available_attrs
        aa.dataChanged.connect(self.update_completer_model)
        aa.rowsInserted.connect(self.update_completer_model)
        aa.rowsRemoved.connect(self.update_completer_model)

        self.available_attrs_view.selectionModel().selectionChanged.connect(
            partial(self.update_interface_state, self.available_attrs_view))
        self.available_attrs_view.dragDropActionDidComplete.connect(dropcompleted)
        self.filter_edit.textChanged.connect(self.update_completer_prefix)
        self.filter_edit.textChanged.connect(
            self.available_attrs_proxy.set_filter_string)

        box.layout().addWidget(self.available_attrs_view)
        layout.addWidget(box, 0, 0, 3, 1)

        box = gui.vBox(self.controlArea, "Features", addToLayout=False)
        self.used_attrs = VariableListModel(enable_dnd=True)
        self.used_attrs_view = VariablesListItemView(
            acceptedType=(Orange.data.DiscreteVariable,
                          Orange.data.ContinuousVariable))

        self.used_attrs_view.setModel(self.used_attrs)
        self.used_attrs_view.selectionModel().selectionChanged.connect(
            partial(self.update_interface_state, self.used_attrs_view))
        self.used_attrs_view.dragDropActionDidComplete.connect(dropcompleted)
        box.layout().addWidget(self.used_attrs_view)
        layout.addWidget(box, 0, 2, 1, 1)

        box = gui.vBox(self.controlArea, "Target Variable", addToLayout=False)
        self.class_attrs = ClassVarListItemModel(enable_dnd=True)
        self.class_attrs_view = ClassVariableItemView(
            acceptedType=(Orange.data.DiscreteVariable,
                          Orange.data.ContinuousVariable))
        self.class_attrs_view.setModel(self.class_attrs)
        self.class_attrs_view.selectionModel().selectionChanged.connect(
            partial(self.update_interface_state, self.class_attrs_view))
        self.class_attrs_view.dragDropActionDidComplete.connect(dropcompleted)
        self.class_attrs_view.setMaximumHeight(24)
        box.layout().addWidget(self.class_attrs_view)
        layout.addWidget(box, 1, 2, 1, 1)

        box = gui.vBox(self.controlArea, "Meta Attributes", addToLayout=False)
        self.meta_attrs = VariableListModel(enable_dnd=True)
        self.meta_attrs_view = VariablesListItemView(
            acceptedType=Orange.data.Variable)
        self.meta_attrs_view.setModel(self.meta_attrs)
        self.meta_attrs_view.selectionModel().selectionChanged.connect(
            partial(self.update_interface_state, self.meta_attrs_view))
        self.meta_attrs_view.dragDropActionDidComplete.connect(dropcompleted)
        box.layout().addWidget(self.meta_attrs_view)
        layout.addWidget(box, 2, 2, 1, 1)

        bbox = gui.vBox(self.controlArea, addToLayout=False, margin=0)
        layout.addWidget(bbox, 0, 1, 1, 1)

        self.up_attr_button = gui.button(bbox, self, "Up",
            callback=partial(self.move_up, self.used_attrs_view))
        self.move_attr_button = gui.button(bbox, self, ">",
            callback=partial(self.move_selected, self.used_attrs_view))
        self.down_attr_button = gui.button(bbox, self, "Down",
            callback=partial(self.move_down, self.used_attrs_view))

        bbox = gui.vBox(self.controlArea, addToLayout=False, margin=0)
        layout.addWidget(bbox, 1, 1, 1, 1)
        self.move_class_button = gui.button(bbox, self, ">",
            callback=partial(self.move_selected,
                             self.class_attrs_view, exclusive=True))

        bbox = gui.vBox(self.controlArea, addToLayout=False, margin=0)
        layout.addWidget(bbox, 2, 1, 1, 1)
        self.up_meta_button = gui.button(bbox, self, "Up",
            callback=partial(self.move_up, self.meta_attrs_view))
        self.move_meta_button = gui.button(bbox, self, ">",
            callback=partial(self.move_selected, self.meta_attrs_view))
        self.down_meta_button = gui.button(bbox, self, "Down",
            callback=partial(self.move_down, self.meta_attrs_view))

        autobox = gui.auto_commit(None, self, "auto_commit", "Send")
        layout.addWidget(autobox, 3, 0, 1, 3)
        reset = gui.button(None, self, "Reset", callback=self.reset)
        autobox.layout().insertWidget(0, self.report_button)
        autobox.layout().insertWidget(1, reset)
        autobox.layout().insertSpacing(2, 10)
        reset.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
        self.report_button.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)

        layout.setRowStretch(0, 4)
        layout.setRowStretch(1, 0)
        layout.setRowStretch(2, 2)
        layout.setHorizontalSpacing(0)
        self.controlArea.setLayout(layout)

        self.data = None
        self.output_data = None
        self.original_completer_items = []

        self.resize(500, 600)

    def set_data(self, data=None):
        self.update_domain_role_hints()
        self.closeContext()
        self.data = data
        if data is not None:
            self.openContext(data)
            all_vars = data.domain.variables + data.domain.metas

            var_sig = lambda attr: (attr.name, vartype(attr))

            domain_hints = {var_sig(attr): ("attribute", i)
                            for i, attr in enumerate(data.domain.attributes)}

            domain_hints.update({var_sig(attr): ("meta", i)
                                for i, attr in enumerate(data.domain.metas)})

            if data.domain.class_vars:
                domain_hints.update(
                    {var_sig(attr): ("class", i)
                     for i, attr in enumerate(data.domain.class_vars)})

            # update the hints from context settings
            domain_hints.update(self.domain_role_hints)

            attrs_for_role = lambda role: [
                (domain_hints[var_sig(attr)][1], attr)
                for attr in all_vars if domain_hints[var_sig(attr)][0] == role]

            attributes = [
                attr for place, attr in sorted(attrs_for_role("attribute"),
                                               key=lambda a: a[0])]
            classes = [
                attr for place, attr in sorted(attrs_for_role("class"),
                                               key=lambda a: a[0])]
            metas = [
                attr for place, attr in sorted(attrs_for_role("meta"),
                                               key=lambda a: a[0])]
            available = [
                attr for place, attr in sorted(attrs_for_role("available"),
                                               key=lambda a: a[0])]

            self.used_attrs[:] = attributes
            self.class_attrs[:] = classes
            self.meta_attrs[:] = metas
            self.available_attrs[:] = available
        else:
            self.used_attrs[:] = []
            self.class_attrs[:] = []
            self.meta_attrs[:] = []
            self.available_attrs[:] = []

        self.unconditional_commit()

    def update_domain_role_hints(self):
        """ Update the domain hints to be stored in the widgets settings.
        """
        hints_from_model = lambda role, model: [
            ((attr.name, vartype(attr)), (role, i))
            for i, attr in enumerate(model)]
        hints = dict(hints_from_model("available", self.available_attrs))
        hints.update(hints_from_model("attribute", self.used_attrs))
        hints.update(hints_from_model("class", self.class_attrs))
        hints.update(hints_from_model("meta", self.meta_attrs))
        self.domain_role_hints = hints

    def selected_rows(self, view):
        """ Return the selected rows in the view.
        """
        rows = view.selectionModel().selectedRows()
        model = view.model()
        if isinstance(model, QSortFilterProxyModel):
            rows = [model.mapToSource(r) for r in rows]
        return [r.row() for r in rows]

    def move_rows(self, view, rows, offset):
        model = view.model()
        newrows = [min(max(0, row + offset), len(model) - 1) for row in rows]

        for row, newrow in sorted(zip(rows, newrows), reverse=offset > 0):
            model[row], model[newrow] = model[newrow], model[row]

        selection = QItemSelection()
        for nrow in newrows:
            index = model.index(nrow, 0)
            selection.select(index, index)
        view.selectionModel().select(
            selection, QItemSelectionModel.ClearAndSelect)

        self.commit()

    def move_up(self, view):
        selected = self.selected_rows(view)
        self.move_rows(view, selected, -1)

    def move_down(self, view):
        selected = self.selected_rows(view)
        self.move_rows(view, selected, 1)

    def move_selected(self, view, exclusive=False):
        if self.selected_rows(view):
            self.move_selected_from_to(view, self.available_attrs_view)
        elif self.selected_rows(self.available_attrs_view):
            self.move_selected_from_to(self.available_attrs_view, view,
                                       exclusive)

    def move_selected_from_to(self, src, dst, exclusive=False):
        self.move_from_to(src, dst, self.selected_rows(src), exclusive)

    def move_from_to(self, src, dst, rows, exclusive=False):
        src_model = source_model(src)
        attrs = [src_model[r] for r in rows]

        if exclusive and len(attrs) != 1:
            return

        for s1, s2 in reversed(list(slices(rows))):
            del src_model[s1:s2]

        dst_model = source_model(dst)
        if exclusive and len(dst_model) > 0:
            src_model.append(dst_model[0])
            del dst_model[0]

        dst_model.extend(attrs)

        self.commit()

    def update_interface_state(self, focus=None, selected=None, deselected=None):
        for view in [self.available_attrs_view, self.used_attrs_view,
                     self.class_attrs_view, self.meta_attrs_view]:
            if view is not focus and not view.hasFocus() and self.selected_rows(view):
                view.selectionModel().clear()

        def selected_vars(view):
            model = source_model(view)
            return [model[i] for i in self.selected_rows(view)]

        available_selected = selected_vars(self.available_attrs_view)
        attrs_selected = selected_vars(self.used_attrs_view)
        class_selected = selected_vars(self.class_attrs_view)
        meta_selected = selected_vars(self.meta_attrs_view)

        available_types = set(map(type, available_selected))
        all_primitive = all(var.is_primitive()
                            for var in available_types)

        move_attr_enabled = (available_selected and all_primitive) or \
                            attrs_selected

        self.move_attr_button.setEnabled(bool(move_attr_enabled))
        if move_attr_enabled:
            self.move_attr_button.setText(">" if available_selected else "<")

        move_class_enabled = (len(available_selected) == 1 and all_primitive) or \
                             class_selected

        self.move_class_button.setEnabled(bool(move_class_enabled))
        if move_class_enabled:
            self.move_class_button.setText(">" if available_selected else "<")
        move_meta_enabled = available_selected or meta_selected

        self.move_meta_button.setEnabled(bool(move_meta_enabled))
        if move_meta_enabled:
            self.move_meta_button.setText(">" if available_selected else "<")

    def update_completer_model(self, *_):
        """ This gets called when the model for available attributes changes
        through either drag/drop or the left/right button actions.

        """
        vars = list(self.available_attrs)
        items = [var.name for var in vars]
        items += ["%s=%s" % item for v in vars for item in v.attributes.items()]

        new = sorted(set(items))
        if new != self.original_completer_items:
            self.original_completer_items = new
            self.completer_model.setStringList(self.original_completer_items)

    def update_completer_prefix(self, filter):
        """ Prefixes all items in the completer model with the current
        already done completion to enable the completion of multiple keywords.
        """
        prefix = str(self.completer.completionPrefix())
        if not prefix.endswith(" ") and " " in prefix:
            prefix, _ = prefix.rsplit(" ", 1)
            items = [prefix + " " + item
                     for item in self.original_completer_items]
        else:
            items = self.original_completer_items
        old = list(map(str, self.completer_model.stringList()))

        if set(old) != set(items):
            self.completer_model.setStringList(items)

    def commit(self):
        self.update_domain_role_hints()
        if self.data is not None:
            attributes = list(self.used_attrs)
            class_var = list(self.class_attrs)
            metas = list(self.meta_attrs)

            domain = Orange.data.Domain(attributes, class_var, metas)
            newdata = self.data.from_table(domain, self.data)
            self.output_data = newdata
            self.send("Data", newdata)
            self.send("Features", widget.AttributeList(attributes))
        else:
            self.output_data = None
            self.send("Data", None)
            self.send("Features", None)

    def reset(self):
        if self.data is not None:
            self.available_attrs[:] = []
            self.used_attrs[:] = self.data.domain.attributes
            self.class_attrs[:] = self.data.domain.class_vars
            self.meta_attrs[:] = self.data.domain.metas
            self.update_domain_role_hints()
            self.commit()

    def send_report(self):
        if not self.data or not self.output_data:
            return
        in_domain, out_domain = self.data.domain, self.output_data.domain
        self.report_domain("Input data", self.data.domain)
        if (in_domain.attributes, in_domain.class_vars, in_domain.metas) == (
                out_domain.attributes, out_domain.class_vars, out_domain.metas):
            self.report_paragraph("Output data", "No changes.")
        else:
            self.report_domain("Output data", self.output_data.domain)
            diff = list(set(in_domain.variables + in_domain.metas) -
                        set(out_domain.variables + out_domain.metas))
            if diff:
                text = "%i (%s)" % (len(diff), ", ".join(x.name for x in diff))
                self.report_items((("Removed", text),))
def variables_filter(model, parent=None):
    """
    GUI components: ListView with a lineedit which works as a filter. One can write
    a variable name in a edit box and possible matches are then shown in a listview.
    """
    def update_completer_model():
        """ This gets called when the model for available attributes changes
        through either drag/drop or the left/right button actions.

        """
        nonlocal original_completer_items
        items = [var.name for var in model]
        items += [
            "%s=%s" % item for v in model for item in v.attributes.items()
        ]

        new = sorted(set(items))
        if new != original_completer_items:
            original_completer_items = new
            completer_model.setStringList(original_completer_items)

    def update_completer_prefix():
        """ Prefixes all items in the completer model with the current
        already done completion to enable the completion of multiple keywords.
        """
        nonlocal original_completer_items
        prefix = str(completer.completionPrefix())
        if not prefix.endswith(" ") and " " in prefix:
            prefix, _ = prefix.rsplit(" ", 1)
            items = [prefix + " " + item for item in original_completer_items]
        else:
            items = original_completer_items
        old = list(map(str, completer_model.stringList()))

        if set(old) != set(items):
            completer_model.setStringList(items)

    original_completer_items = []

    filter_edit = QLineEdit()
    filter_edit.setToolTip("Filter the list of available variables.")
    filter_edit.setPlaceholderText("Filter")

    completer_model = QStringListModel()
    completer = QCompleter(completer_model)
    completer.setCompletionMode(QCompleter.InlineCompletion)
    completer.setModelSorting(QCompleter.CaseSensitivelySortedModel)

    filter_edit.setCompleter(completer)
    completer_navigator = CompleterNavigator(parent)
    filter_edit.installEventFilter(completer_navigator)

    proxy = VariableFilterProxyModel()
    proxy.setSourceModel(model)
    view = VariablesListItemView(acceptedType=Orange.data.Variable)
    view.setModel(proxy)

    model.dataChanged.connect(update_completer_model)
    model.rowsInserted.connect(update_completer_model)
    model.rowsRemoved.connect(update_completer_model)

    filter_edit.textChanged.connect(update_completer_prefix)
    filter_edit.textChanged.connect(proxy.set_filter_string)

    return filter_edit, view
Exemplo n.º 4
0
class OWSql(OWWidget):
    name = "SQL Table"
    id = "orange.widgets.data.sql"
    description = "Load data set from SQL."
    icon = "icons/SQLTable.svg"
    priority = 10
    category = "Data"
    keywords = ["data", "file", "load", "read"]

    class Outputs:
        data = Output(
            "Data",
            Table,
            doc="Attribute-valued data set read from the input file.")

    settings_version = 2

    want_main_area = False
    resizing_enabled = False

    host = Setting(None)
    port = Setting(None)
    database = Setting(None)
    schema = Setting(None)
    username = ""
    password = ""
    table = Setting(None)
    sql = Setting("")
    guess_values = Setting(True)
    download = Setting(False)

    materialize = Setting(False)
    materialize_table_name = Setting("")

    class Information(OWWidget.Information):
        data_sampled = Msg("Data description was generated from a sample.")

    class Error(OWWidget.Error):
        connection = Msg("{}")
        no_backends = Msg("Please install a backend to use this widget")
        missing_extension = Msg("Database is missing extension{}: {}")

    def __init__(self):
        super().__init__()

        self.backend = None
        self.data_desc_table = None
        self.database_desc = None

        vbox = gui.vBox(self.controlArea, "Server", addSpace=True)
        box = gui.vBox(vbox)

        self.backendmodel = BackendModel(Backend.available_backends())
        self.backendcombo = QComboBox(box)
        if len(self.backendmodel):
            self.backendcombo.setModel(self.backendmodel)
        else:
            self.Error.no_backends()
            box.setEnabled(False)
        box.layout().addWidget(self.backendcombo)

        self.servertext = QLineEdit(box)
        self.servertext.setPlaceholderText('Server')
        self.servertext.setToolTip('Server')
        self.servertext.editingFinished.connect(self._load_credentials)
        if self.host:
            self.servertext.setText(self.host if not self.port else '{}:{}'.
                                    format(self.host, self.port))
        box.layout().addWidget(self.servertext)

        self.databasetext = QLineEdit(box)
        self.databasetext.setPlaceholderText('Database[/Schema]')
        self.databasetext.setToolTip('Database or optionally Database/Schema')
        if self.database:
            self.databasetext.setText(
                self.database if not self.schema else '{}/{}'.
                format(self.database, self.schema))
        box.layout().addWidget(self.databasetext)
        self.usernametext = QLineEdit(box)
        self.usernametext.setPlaceholderText('Username')
        self.usernametext.setToolTip('Username')

        box.layout().addWidget(self.usernametext)
        self.passwordtext = QLineEdit(box)
        self.passwordtext.setPlaceholderText('Password')
        self.passwordtext.setToolTip('Password')
        self.passwordtext.setEchoMode(QLineEdit.Password)

        box.layout().addWidget(self.passwordtext)

        self._load_credentials()

        tables = gui.hBox(box)
        self.tablemodel = TableModel()
        self.tablecombo = QComboBox(
            minimumContentsLength=35,
            sizeAdjustPolicy=QComboBox.AdjustToMinimumContentsLength)
        self.tablecombo.setModel(self.tablemodel)
        self.tablecombo.setToolTip('table')
        tables.layout().addWidget(self.tablecombo)
        self.tablecombo.activated[int].connect(self.select_table)
        self.connectbutton = gui.button(tables,
                                        self,
                                        '↻',
                                        callback=self.connect)
        self.connectbutton.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
        tables.layout().addWidget(self.connectbutton)

        self.custom_sql = gui.vBox(box)
        self.custom_sql.setVisible(False)
        self.sqltext = QTextEdit(self.custom_sql)
        self.sqltext.setPlainText(self.sql)
        self.custom_sql.layout().addWidget(self.sqltext)

        mt = gui.hBox(self.custom_sql)
        cb = gui.checkBox(mt, self, 'materialize', 'Materialize to table ')
        cb.setToolTip('Save results of the query in a table')
        le = gui.lineEdit(mt, self, 'materialize_table_name')
        le.setToolTip('Save results of the query in a table')

        self.executebtn = gui.button(self.custom_sql,
                                     self,
                                     'Execute',
                                     callback=self.open_table)

        box.layout().addWidget(self.custom_sql)

        gui.checkBox(box,
                     self,
                     "guess_values",
                     "Auto-discover discrete variables",
                     callback=self.open_table)

        gui.checkBox(box,
                     self,
                     "download",
                     "Download data to local memory",
                     callback=self.open_table)

        gui.rubber(self.buttonsArea)
        QTimer.singleShot(0, self.connect)

    def _load_credentials(self):
        self._parse_host_port()
        cm = self._credential_manager(self.host, self.port)
        self.username = cm.username
        self.password = cm.password

        if self.username:
            self.usernametext.setText(self.username)
        if self.password:
            self.passwordtext.setText(self.password)

    def _save_credentials(self):
        cm = self._credential_manager(self.host, self.port)
        cm.username = self.username
        cm.password = self.password

    def _credential_manager(self, host, port):
        return CredentialManager("SQL Table: {}:{}".format(host, port))

    def error(self, id=0, text=""):
        super().error(id, text)
        err_style = 'QLineEdit {border: 2px solid red;}'
        if 'server' in text or 'host' in text:
            self.servertext.setStyleSheet(err_style)
        else:
            self.servertext.setStyleSheet('')
        if 'role' in text:
            self.usernametext.setStyleSheet(err_style)
        else:
            self.usernametext.setStyleSheet('')
        if 'database' in text:
            self.databasetext.setStyleSheet(err_style)
        else:
            self.databasetext.setStyleSheet('')

    def _parse_host_port(self):
        hostport = self.servertext.text().split(':')
        self.host = hostport[0]
        self.port = hostport[1] if len(hostport) == 2 else None

    def connect(self):
        self._parse_host_port()
        self.database, _, self.schema = self.databasetext.text().partition('/')
        self.username = self.usernametext.text() or None
        self.password = self.passwordtext.text() or None
        try:
            if self.backendcombo.currentIndex() < 0:
                return
            backend = self.backendmodel[self.backendcombo.currentIndex()]
            self.backend = backend(
                dict(host=self.host,
                     port=self.port,
                     database=self.database,
                     user=self.username,
                     password=self.password))
            self.Error.connection.clear()
            self._save_credentials()
            self.database_desc = OrderedDict(
                (("Host", self.host), ("Port", self.port),
                 ("Database", self.database), ("User name", self.username)))
            self.refresh_tables()
            self.select_table()
        except BackendError as err:
            error = str(err).split('\n')[0]
            self.Error.connection(error)
            self.database_desc = self.data_desc_table = None
            self.tablecombo.clear()

    def refresh_tables(self):
        self.tablemodel.clear()
        self.Error.missing_extension.clear()
        if self.backend is None:
            self.data_desc_table = None
            return

        self.tablemodel.append("Select a table")
        self.tablemodel.extend(self.backend.list_tables(self.schema))
        self.tablemodel.append("Custom SQL")

    def select_table(self):
        curIdx = self.tablecombo.currentIndex()
        if self.tablecombo.itemText(curIdx) != "Custom SQL":
            self.custom_sql.setVisible(False)
            return self.open_table()
        else:
            self.custom_sql.setVisible(True)
            self.data_desc_table = None
            self.database_desc["Table"] = "(None)"
            self.table = None

        #self.Error.missing_extension(
        #    's' if len(missing) > 1 else '',
        #    ', '.join(missing),
        #    shown=missing)

    def open_table(self):
        table = self.get_table()
        self.data_desc_table = table
        self.Outputs.data.send(table)

    def get_table(self):
        if self.tablecombo.currentIndex() <= 0:
            if self.database_desc:
                self.database_desc["Table"] = "(None)"
            self.data_desc_table = None
            return

        if self.tablecombo.currentIndex() < self.tablecombo.count() - 1:
            self.table = self.tablemodel[self.tablecombo.currentIndex()]
            self.database_desc["Table"] = self.table
            if "Query" in self.database_desc:
                del self.database_desc["Query"]
        else:
            self.sql = self.table = self.sqltext.toPlainText()
            if self.materialize:
                import psycopg2
                if not self.materialize_table_name:
                    self.Error.connection(
                        "Specify a table name to materialize the query")
                    return
                try:
                    with self.backend.execute_sql_query(
                            "DROP TABLE IF EXISTS " +
                            self.materialize_table_name):
                        pass
                    with self.backend.execute_sql_query(
                            "CREATE TABLE " + self.materialize_table_name +
                            " AS " + self.table):
                        pass
                    with self.backend.execute_sql_query(
                            "ANALYZE " + self.materialize_table_name):
                        pass
                    self.table = self.materialize_table_name
                except (psycopg2.ProgrammingError, BackendError) as ex:
                    self.Error.connection(str(ex))
                    return

        try:
            table = SqlTable(dict(host=self.host,
                                  port=self.port,
                                  database=self.database,
                                  user=self.username,
                                  password=self.password),
                             self.table,
                             backend=type(self.backend),
                             inspect_values=False)
        except BackendError as ex:
            self.Error.connection(str(ex))
            return

        self.Error.connection.clear()

        sample = False
        if table.approx_len() > LARGE_TABLE and self.guess_values:
            confirm = QMessageBox(self)
            confirm.setIcon(QMessageBox.Warning)
            confirm.setText("Attribute discovery might take "
                            "a long time on large tables.\n"
                            "Do you want to auto discover attributes?")
            confirm.addButton("Yes", QMessageBox.YesRole)
            no_button = confirm.addButton("No", QMessageBox.NoRole)
            sample_button = confirm.addButton("Yes, on a sample",
                                              QMessageBox.YesRole)
            confirm.exec()
            if confirm.clickedButton() == no_button:
                self.guess_values = False
            elif confirm.clickedButton() == sample_button:
                sample = True

        self.Information.clear()
        if self.guess_values:
            QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
            if sample:
                s = table.sample_time(1)
                domain = s.get_domain(inspect_values=True)
                self.Information.data_sampled()
            else:
                domain = table.get_domain(inspect_values=True)
            QApplication.restoreOverrideCursor()
            table.domain = domain

        if self.download:
            if table.approx_len() > MAX_DL_LIMIT:
                QMessageBox.warning(
                    self, 'Warning', "Data is too big to download.\n"
                    "Consider using the Data Sampler widget to download "
                    "a sample instead.")
                self.download = False
            elif table.approx_len() > AUTO_DL_LIMIT:
                confirm = QMessageBox.question(
                    self, 'Question', "Data appears to be big. Do you really "
                    "want to download it to local memory?",
                    QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
                if confirm == QMessageBox.No:
                    self.download = False
        if self.download:
            table.download_data(MAX_DL_LIMIT)
            table = Table(table)

        return table

    def send_report(self):
        if not self.database_desc:
            self.report_paragraph("No database connection.")
            return
        self.report_items("Database", self.database_desc)
        if self.data_desc_table:
            self.report_items("Data",
                              report.describe_data(self.data_desc_table))

    @classmethod
    def migrate_settings(cls, settings, version):
        if version < 2:
            # Until Orange version 3.4.4 username and password had been stored
            # in Settings.
            cm = cls._credential_manager(settings["host"], settings["port"])
            cm.username = settings["username"]
            cm.password = settings["password"]
Exemplo n.º 5
0
class OWSql(OWWidget):
    name = "SQL Table"
    id = "orange.widgets.data.sql"
    description = "Load data set from SQL."
    icon = "icons/SQLTable.svg"
    priority = 30
    category = "Data"
    keywords = ["data", "file", "load", "read", "SQL"]

    class Outputs:
        data = Output("Data", Table, doc="Attribute-valued data set read from the input file.")

    settings_version = 2

    want_main_area = False
    resizing_enabled = False

    host = Setting(None)
    port = Setting(None)
    database = Setting(None)
    schema = Setting(None)
    username = ""
    password = ""
    table = Setting(None)
    sql = Setting("")
    guess_values = Setting(True)
    download = Setting(False)

    materialize = Setting(False)
    materialize_table_name = Setting("")

    class Information(OWWidget.Information):
        data_sampled = Msg("Data description was generated from a sample.")

    class Error(OWWidget.Error):
        connection = Msg("{}")
        no_backends = Msg("Please install a backend to use this widget")
        missing_extension = Msg("Database is missing extension{}: {}")

    def __init__(self):
        super().__init__()

        self.backend = None
        self.data_desc_table = None
        self.database_desc = None

        vbox = gui.vBox(self.controlArea, "Server", addSpace=True)
        box = gui.vBox(vbox)

        self.backends = BackendModel(Backend.available_backends())
        self.backendcombo = QComboBox(box)
        if len(self.backends):
            self.backendcombo.setModel(self.backends)
        else:
            self.Error.no_backends()
            box.setEnabled(False)
        box.layout().addWidget(self.backendcombo)

        self.servertext = QLineEdit(box)
        self.servertext.setPlaceholderText('Server')
        self.servertext.setToolTip('Server')
        self.servertext.editingFinished.connect(self._load_credentials)
        if self.host:
            self.servertext.setText(self.host if not self.port else
                                    '{}:{}'.format(self.host, self.port))
        box.layout().addWidget(self.servertext)

        self.databasetext = QLineEdit(box)
        self.databasetext.setPlaceholderText('Database[/Schema]')
        self.databasetext.setToolTip('Database or optionally Database/Schema')
        if self.database:
            self.databasetext.setText(
                self.database if not self.schema else
                '{}/{}'.format(self.database, self.schema))
        box.layout().addWidget(self.databasetext)
        self.usernametext = QLineEdit(box)
        self.usernametext.setPlaceholderText('Username')
        self.usernametext.setToolTip('Username')

        box.layout().addWidget(self.usernametext)
        self.passwordtext = QLineEdit(box)
        self.passwordtext.setPlaceholderText('Password')
        self.passwordtext.setToolTip('Password')
        self.passwordtext.setEchoMode(QLineEdit.Password)

        box.layout().addWidget(self.passwordtext)

        self._load_credentials()
        self.tables = TableModel()

        tables = gui.hBox(box)
        self.tablecombo = QComboBox(
            minimumContentsLength=35,
            sizeAdjustPolicy=QComboBox.AdjustToMinimumContentsLength
        )
        self.tablecombo.setModel(self.tables)
        self.tablecombo.setToolTip('table')
        tables.layout().addWidget(self.tablecombo)
        self.connect()

        index = self.tablecombo.findText(str(self.table))
        if index != -1:
            self.tablecombo.setCurrentIndex(index)
        # set up the callback to select_table in case of selection change
        self.tablecombo.activated[int].connect(self.select_table)

        self.connectbutton = gui.button(
            tables, self, '↻', callback=self.connect)
        self.connectbutton.setSizePolicy(
            QSizePolicy.Fixed, QSizePolicy.Fixed)
        tables.layout().addWidget(self.connectbutton)

        self.custom_sql = gui.vBox(box)
        self.custom_sql.setVisible(False)
        self.sqltext = QTextEdit(self.custom_sql)
        self.sqltext.setPlainText(self.sql)
        self.custom_sql.layout().addWidget(self.sqltext)

        mt = gui.hBox(self.custom_sql)
        cb = gui.checkBox(mt, self, 'materialize', 'Materialize to table ')
        cb.setToolTip('Save results of the query in a table')
        le = gui.lineEdit(mt, self, 'materialize_table_name')
        le.setToolTip('Save results of the query in a table')

        self.executebtn = gui.button(
            self.custom_sql, self, 'Execute', callback=self.open_table)

        box.layout().addWidget(self.custom_sql)

        gui.checkBox(box, self, "guess_values",
                     "Auto-discover categorical variables",
                     callback=self.open_table)

        gui.checkBox(box, self, "download",
                     "Download data to local memory",
                     callback=self.open_table)

        gui.rubber(self.buttonsArea)

        QTimer.singleShot(0, self.select_table)

    def _load_credentials(self):
        self._parse_host_port()
        cm = self._credential_manager(self.host, self.port)
        self.username = cm.username
        self.password = cm.password

        if self.username:
            self.usernametext.setText(self.username)
        if self.password:
            self.passwordtext.setText(self.password)

    def _save_credentials(self):
        cm = self._credential_manager(self.host, self.port)
        cm.username = self.username or ''
        cm.password = self.password or ''

    def _credential_manager(self, host, port):
        return CredentialManager("SQL Table: {}:{}".format(host, port))

    def error(self, id=0, text=""):
        super().error(id, text)
        err_style = 'QLineEdit {border: 2px solid red;}'
        if 'server' in text or 'host' in text:
            self.servertext.setStyleSheet(err_style)
        else:
            self.servertext.setStyleSheet('')
        if 'role' in text:
            self.usernametext.setStyleSheet(err_style)
        else:
            self.usernametext.setStyleSheet('')
        if 'database' in text:
            self.databasetext.setStyleSheet(err_style)
        else:
            self.databasetext.setStyleSheet('')

    def _parse_host_port(self):
        hostport = self.servertext.text().split(':')
        self.host = hostport[0]
        self.port = hostport[1] if len(hostport) == 2 else None

    def connect(self):
        self._parse_host_port()
        self.database, _, self.schema = self.databasetext.text().partition('/')
        self.username = self.usernametext.text() or None
        self.password = self.passwordtext.text() or None
        try:
            if self.backendcombo.currentIndex() < 0:
                return
            backend = self.backends[self.backendcombo.currentIndex()]
            self.backend = backend(dict(
                host=self.host,
                port=self.port,
                database=self.database,
                user=self.username,
                password=self.password
            ))
            self.Error.connection.clear()
            self._save_credentials()
            self.database_desc = OrderedDict((
                ("Host", self.host), ("Port", self.port),
                ("Database", self.database), ("User name", self.username)
            ))
            self.refresh_tables()
        except BackendError as err:
            error = str(err).split('\n')[0]
            self.Error.connection(error)
            self.database_desc = self.data_desc_table = None
            self.tablecombo.clear()

    def refresh_tables(self):
        self.tables.clear()
        self.Error.missing_extension.clear()
        if self.backend is None:
            self.data_desc_table = None
            return

        self.tables.append("Select a table")
        self.tables.append("Custom SQL")
        self.tables.extend(self.backend.list_tables(self.schema))

    # Called on tablecombo selection change:
    def select_table(self):
        curIdx = self.tablecombo.currentIndex()
        if self.tablecombo.itemText(curIdx) != "Custom SQL":
            self.custom_sql.setVisible(False)
            return self.open_table()
        else:
            self.custom_sql.setVisible(True)
            self.data_desc_table = None
            self.database_desc["Table"] = "(None)"
            self.table = None
            if len(str(self.sql)) > 14:
                return self.open_table()

        #self.Error.missing_extension(
        #    's' if len(missing) > 1 else '',
        #    ', '.join(missing),
        #    shown=missing)

    def open_table(self):
        table = self.get_table()
        self.data_desc_table = table
        self.Outputs.data.send(table)

    def get_table(self):
        curIdx = self.tablecombo.currentIndex()
        if curIdx <= 0:
            if self.database_desc:
                self.database_desc["Table"] = "(None)"
            self.data_desc_table = None
            return

        if self.tablecombo.itemText(curIdx) != "Custom SQL":
            self.table = self.tables[self.tablecombo.currentIndex()]
            self.database_desc["Table"] = self.table
            if "Query" in self.database_desc:
                del self.database_desc["Query"]
            what = self.table
        else:
            what = self.sql = self.sqltext.toPlainText()
            self.table = "Custom SQL"
            if self.materialize:
                import psycopg2
                if not self.materialize_table_name:
                    self.Error.connection(
                        "Specify a table name to materialize the query")
                    return
                try:
                    with self.backend.execute_sql_query("DROP TABLE IF EXISTS " +
                                                        self.materialize_table_name):
                        pass
                    with self.backend.execute_sql_query("CREATE TABLE " +
                                                        self.materialize_table_name +
                                                        " AS " + self.sql):
                        pass
                    with self.backend.execute_sql_query("ANALYZE " + self.materialize_table_name):
                        pass
                except (psycopg2.ProgrammingError, BackendError) as ex:
                    self.Error.connection(str(ex))
                    return

        try:
            table = SqlTable(dict(host=self.host,
                                  port=self.port,
                                  database=self.database,
                                  user=self.username,
                                  password=self.password),
                             what,
                             backend=type(self.backend),
                             inspect_values=False)
        except BackendError as ex:
            self.Error.connection(str(ex))
            return

        self.Error.connection.clear()

        sample = False

        if table.approx_len() > LARGE_TABLE and self.guess_values:
            confirm = QMessageBox(self)
            confirm.setIcon(QMessageBox.Warning)
            confirm.setText("Attribute discovery might take "
                            "a long time on large tables.\n"
                            "Do you want to auto discover attributes?")
            confirm.addButton("Yes", QMessageBox.YesRole)
            no_button = confirm.addButton("No", QMessageBox.NoRole)
            sample_button = confirm.addButton("Yes, on a sample",
                                              QMessageBox.YesRole)
            confirm.exec()
            if confirm.clickedButton() == no_button:
                self.guess_values = False
            elif confirm.clickedButton() == sample_button:
                sample = True

        self.Information.clear()
        if self.guess_values:
            QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
            if sample:
                s = table.sample_time(1)
                domain = s.get_domain(inspect_values=True)
                self.Information.data_sampled()
            else:
                domain = table.get_domain(inspect_values=True)
            QApplication.restoreOverrideCursor()
            table.domain = domain

        if self.download:
            if table.approx_len() > MAX_DL_LIMIT:
                QMessageBox.warning(
                    self, 'Warning', "Data is too big to download.\n"
                    "Consider using the Data Sampler widget to download "
                    "a sample instead.")
                self.download = False
            elif table.approx_len() > AUTO_DL_LIMIT:
                confirm = QMessageBox.question(
                    self, 'Question', "Data appears to be big. Do you really "
                                      "want to download it to local memory?",
                    QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
                if confirm == QMessageBox.No:
                    self.download = False
        if self.download:
            table.download_data(MAX_DL_LIMIT)
            table = Table(table)

        return table

    def send_report(self):
        if not self.database_desc:
            self.report_paragraph("No database connection.")
            return
        self.report_items("Database", self.database_desc)
        if self.data_desc_table:
            self.report_items("Data",
                              report.describe_data(self.data_desc_table))

    @classmethod
    def migrate_settings(cls, settings, version):
        if version < 2:
            # Until Orange version 3.4.4 username and password had been stored
            # in Settings.
            cm = cls._credential_manager(settings["host"], settings["port"])
            cm.username = settings["username"]
            cm.password = settings["password"]
Exemplo n.º 6
0
class OWBaseSql(OWWidget, openclass=True):
    """Base widget for connecting to a database.
    Override `get_backend` when subclassing to get corresponding backend.
    """
    class Outputs:
        data = Output("Data", Table)

    class Error(OWWidget.Error):
        connection = Msg("{}")

    want_main_area = False
    resizing_enabled = False

    host = Setting(None)  # type: Optional[str]
    port = Setting(None)  # type: Optional[str]
    database = Setting(None)  # type: Optional[str]
    schema = Setting(None)  # type: Optional[str]
    username = ""
    password = ""

    def __init__(self):
        super().__init__()
        self.backend = None  # type: Optional[Backend]
        self.data_desc_table = None  # type: Optional[Table]
        self.database_desc = None  # type: Optional[OrderedDict]
        self._setup_gui()
        self.connect()

    def _setup_gui(self):
        self.controlArea.setMinimumWidth(360)

        vbox = gui.vBox(self.controlArea, "Server", addSpace=True)
        self.serverbox = gui.vBox(vbox)
        self.servertext = QLineEdit(self.serverbox)
        self.servertext.setPlaceholderText("Server")
        self.servertext.setToolTip("Server")
        self.servertext.editingFinished.connect(self._load_credentials)
        if self.host:
            self.servertext.setText(self.host if not self.port else
                                    "{}:{}".format(self.host, self.port))
        self.serverbox.layout().addWidget(self.servertext)

        self.databasetext = QLineEdit(self.serverbox)
        self.databasetext.setPlaceholderText("Database[/Schema]")
        self.databasetext.setToolTip("Database or optionally Database/Schema")
        if self.database:
            self.databasetext.setText(
                self.database if not self.schema else
                "{}/{}".format(self.database, self.schema))
        self.serverbox.layout().addWidget(self.databasetext)
        self.usernametext = QLineEdit(self.serverbox)
        self.usernametext.setPlaceholderText("Username")
        self.usernametext.setToolTip("Username")

        self.serverbox.layout().addWidget(self.usernametext)
        self.passwordtext = QLineEdit(self.serverbox)
        self.passwordtext.setPlaceholderText("Password")
        self.passwordtext.setToolTip("Password")
        self.passwordtext.setEchoMode(QLineEdit.Password)

        self.serverbox.layout().addWidget(self.passwordtext)

        self._load_credentials()

        self.connectbutton = gui.button(self.serverbox, self, "Connect",
                                        callback=self.connect)
        self.connectbutton.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)

    def _load_credentials(self):
        self._parse_host_port()
        cm = self._credential_manager(self.host, self.port)
        self.username = cm.username
        self.password = cm.password

        if self.username:
            self.usernametext.setText(self.username)
        if self.password:
            self.passwordtext.setText(self.password)

    def _save_credentials(self):
        cm = self._credential_manager(self.host, self.port)
        cm.username = self.username or ""
        cm.password = self.password or ""

    @staticmethod
    def _credential_manager(host, port):
        return CredentialManager("SQL Table: {}:{}".format(host, port))

    def _parse_host_port(self):
        hostport = self.servertext.text().split(":")
        self.host = hostport[0]
        self.port = hostport[1] if len(hostport) == 2 else None

    def _check_db_settings(self):
        self._parse_host_port()
        self.database, _, self.schema = self.databasetext.text().partition("/")
        self.username = self.usernametext.text() or None
        self.password = self.passwordtext.text() or None

    def connect(self):
        self.clear()
        self._check_db_settings()
        if not self.host or not self.database:
            return
        try:
            backend = self.get_backend()
            if backend is None:
                return
            self.backend = backend(dict(
                host=self.host,
                port=self.port,
                database=self.database,
                user=self.username,
                password=self.password
            ))
            self.on_connection_success()
        except BackendError as err:
            self.on_connection_error(err)

    def get_backend(self) -> Type[Backend]:
        """
        Derived widgets should override this to get corresponding backend.

        Returns
        -------
        backend: Type[Backend]
        """
        raise NotImplementedError

    def on_connection_success(self):
        self._save_credentials()
        self.database_desc = OrderedDict((
            ("Host", self.host), ("Port", self.port),
            ("Database", self.database), ("User name", self.username)
        ))

    def on_connection_error(self, err):
        error = str(err).split("\n")[0]
        self.Error.connection(error)

    def open_table(self):
        data = self.get_table()
        self.data_desc_table = data
        self.Outputs.data.send(data)
        info = str(len(data)) if data else self.info.NoOutput
        self.info.set_output_summary(info)

    def get_table(self) -> Table:
        """
        Derived widgets should override this to get corresponding table.

        Returns
        -------
        table: Table
        """
        raise NotImplementedError

    def clear(self):
        self.Error.connection.clear()
        self.database_desc = None
        self.data_desc_table = None
        self.Outputs.data.send(None)
        self.info.set_output_summary(self.info.NoOutput)

    def send_report(self):
        if not self.database_desc:
            self.report_paragraph("No database connection.")
            return
        self.report_items("Database", self.database_desc)
        if self.data_desc_table:
            self.report_items("Data",
                              report.describe_data(self.data_desc_table))
Exemplo n.º 7
0
def variables_filter(model, parent=None, accepted_type=Orange.data.Variable,
                     view_type=VariablesListItemView):
    """
    GUI components: ListView with a lineedit which works as a filter. One can write
    a variable name in a edit box and possible matches are then shown in a listview.
    """
    def update_completer_model():
        """ This gets called when the model for available attributes changes
        through either drag/drop or the left/right button actions.

        """
        nonlocal original_completer_items
        items = ["%s=%s" % item for v in model for item in v.attributes.items()]

        new = sorted(set(items))
        if new != original_completer_items:
            original_completer_items = new
            completer_model.setStringList(original_completer_items)

    def update_completer_prefix():
        """ Prefixes all items in the completer model with the current
        already done completion to enable the completion of multiple keywords.
        """
        nonlocal original_completer_items
        prefix = str(completer.completionPrefix())
        if not prefix.endswith(" ") and " " in prefix:
            prefix, _ = prefix.rsplit(" ", 1)
            items = [prefix + " " + item
                     for item in original_completer_items]
        else:
            items = original_completer_items
        old = list(map(str, completer_model.stringList()))

        if set(old) != set(items):
            completer_model.setStringList(items)

    original_completer_items = []

    filter_edit = QLineEdit()
    filter_edit.setToolTip("Filter the list of available variables.")
    filter_edit.setPlaceholderText("Filter")

    completer_model = QStringListModel()
    completer = QCompleter(completer_model, filter_edit)
    completer.setCompletionMode(QCompleter.InlineCompletion)
    completer.setModelSorting(QCompleter.CaseSensitivelySortedModel)

    filter_edit.setCompleter(completer)
    completer_navigator = CompleterNavigator(parent)
    filter_edit.installEventFilter(completer_navigator)

    proxy = VariableFilterProxyModel()
    proxy.setSourceModel(model)
    view = view_type(acceptedType=accepted_type)
    view.setModel(proxy)

    model.dataChanged.connect(update_completer_model)
    model.rowsInserted.connect(update_completer_model)
    model.rowsRemoved.connect(update_completer_model)

    filter_edit.textChanged.connect(update_completer_prefix)
    filter_edit.textChanged.connect(proxy.set_filter_string)

    return filter_edit, view