Python QStackedWidget.setCurrentWidget方法代码示例

# 需要导入模块: from AnyQt.QtWidgets import QStackedWidget [as 别名]
# 或者: from AnyQt.QtWidgets.QStackedWidget import setCurrentWidget [as 别名]

#.........这里部分代码省略.........
        # Layout for the list view
        layout = QVBoxLayout(spacing=1, margin=0)
        self.featuremodel = DescriptorModel(parent=self)

        self.featureview = QListView(
            minimumWidth=200,
            sizePolicy=QSizePolicy(QSizePolicy.Minimum,
                                   QSizePolicy.MinimumExpanding)
        )

        self.featureview.setItemDelegate(FeatureItemDelegate(self))
        self.featureview.setModel(self.featuremodel)
        self.featureview.selectionModel().selectionChanged.connect(
            self._on_selectedVariableChanged
        )

        layout.addWidget(self.featureview)

        box.layout().addLayout(layout, 1)

        box = gui.hBox(self.controlArea)
        gui.rubber(box)
        commit = gui.button(box, self, "Send", callback=self.apply,
                            default=True)
        commit.setMinimumWidth(180)

    def setCurrentIndex(self, index):
        index = min(index, len(self.featuremodel) - 1)
        self.currentIndex = index
        if index >= 0:
            itemmodels.select_row(self.featureview, index)
            desc = self.featuremodel[min(index, len(self.featuremodel) - 1)]
            editor = self.editors[type(desc)]
            self.editorstack.setCurrentWidget(editor)
            editor.setEditorData(desc, self.data.domain if self.data else None)
        self.editorstack.setEnabled(index >= 0)
        self.duplicateaction.setEnabled(index >= 0)
        self.removebutton.setEnabled(index >= 0)

    def _on_selectedVariableChanged(self, selected, *_):
        index = selected_row(self.featureview)
        if index is not None:
            self.setCurrentIndex(index)
        else:
            self.setCurrentIndex(-1)

    def _on_modified(self):
        if self.currentIndex >= 0:
            editor = self.editorstack.currentWidget()
            self.featuremodel[self.currentIndex] = editor.editorData()
            self.descriptors = list(self.featuremodel)

    def setDescriptors(self, descriptors):
        """
        Set a list of variable descriptors to edit.
        """
        self.descriptors = descriptors
        self.featuremodel[:] = list(self.descriptors)

    @Inputs.data
    @check_sql_input
    def setData(self, data=None):
        """Set the input dataset."""
        self.closeContext()

        self.data = data

# 需要导入模块: from AnyQt.QtWidgets import QStackedWidget [as 别名]
# 或者: from AnyQt.QtWidgets.QStackedWidget import setCurrentWidget [as 别名]

#.........这里部分代码省略.........
        self.domain_model[:] = list(self.input_vars)

    def _restore(self):
        # Restore the variable states from saved settings.
        def transform(var):
            vdesc = variable_description(var, skip_attributes=True)
            if vdesc in self.domain_change_hints:
                return variable_from_description(
                    self.domain_change_hints[vdesc],
                    compute_value=Orange.preprocess.transformation.Identity(var))
            else:
                return var

        self.domain_model[:] = map(transform, self.input_vars)

        # Restore the variable selection if possible
        index = self.selected_index
        if index >= len(self.input_vars):
            index = 0 if len(self.input_vars) else -1
        if index >= 0:
            itemmodels.select_row(self.domain_view, index)

    def _on_selection_changed(self):
        self.selected_index = self.selected_var_index()
        self.open_editor(self.selected_index)

    def open_editor(self, index):
        self.clear_editor()
        if index < 0:
            return

        var = self.domain_model[index]

        editor_index = 2
        if var.is_discrete:
            editor_index = 0
        elif var.is_continuous:
            editor_index = 1
        editor = self.editor_stack.widget(editor_index)
        self.editor_stack.setCurrentWidget(editor)

        editor.set_data(var)
        editor.variable_changed.connect(self._on_variable_changed)

    def clear_editor(self):
        current = self.editor_stack.currentWidget()
        try:
            current.variable_changed.disconnect(self._on_variable_changed)
        except Exception:
            pass
        current.set_data(None)

    def _on_variable_changed(self):
        """User edited the current variable in editor."""
        assert 0 <= self.selected_index <= len(self.domain_model)
        editor = self.editor_stack.currentWidget()

        # Replace the variable in the 'Domain Features' view/model
        old_var = self.input_vars[self.selected_index]
        new_var = editor.get_data().copy(compute_value=Orange.preprocess.transformation.Identity(old_var))
        self.domain_model[self.selected_index] = new_var


        # Store the transformation hint.
        old_var_desc = variable_description(old_var, skip_attributes=True)
        self.domain_change_hints[old_var_desc] = variable_description(new_var)

        self._invalidate()

    def _invalidate(self):
        self.commit()

    def commit(self):
        """Send the changed data to output."""
        new_data = None
        if self.data is not None:
            input_domain = self.data.domain
            n_attrs = len(input_domain.attributes)
            n_vars = len(input_domain.variables)
            n_class_vars = len(input_domain.class_vars)
            all_new_vars = list(self.domain_model)
            attrs = all_new_vars[: n_attrs]
            class_vars = all_new_vars[n_attrs: n_attrs + n_class_vars]
            new_metas = all_new_vars[n_attrs + n_class_vars:]
            new_domain = Orange.data.Domain(attrs, class_vars, new_metas)
            new_data = self.data.from_table(new_domain, self.data)

        self.send("Data", new_data)

    def sizeHint(self):
        sh = super().sizeHint()
        return sh.expandedTo(QSize(660, 550))

    def send_report(self):
        if self.data is not None:
            self.report_raw("", EditDomainReport(
                old_domain=chain(self.data.domain.variables, self.data.domain.metas),
                new_domain=self.domain_model).to_html())
        else:
            self.report_data(None)

# 需要导入模块: from AnyQt.QtWidgets import QStackedWidget [as 别名]
# 或者: from AnyQt.QtWidgets.QStackedWidget import setCurrentWidget [as 别名]

#.........这里部分代码省略.........

        if i != -1:
            itemmodels.select_row(self.variables_view, i)

    def _on_selection_changed(self):
        self.selected_index = self.selected_var_index()
        if self.selected_index != -1:
            self._selected_item = self.variables_model[self.selected_index].name
        else:
            self._selected_item = None
        self.open_editor(self.selected_index)

    def open_editor(self, index):
        # type: (int) -> None
        self.clear_editor()
        model = self.variables_model
        if not 0 <= index < model.rowCount():
            return
        idx = model.index(index, 0)
        var = model.data(idx, Qt.EditRole)
        tr = model.data(idx, TransformRole)
        if tr is None:
            tr = []

        editors = {
            Categorical: 0,
            Real: 1,
            Time: 2,
            String: 3
        }

        editor_index = editors.get(type(var), 3)
        editor = self.editor_stack.widget(editor_index)
        self.editor_stack.setCurrentWidget(editor)
        editor.set_data(var, tr)
        editor.variable_changed.connect(
            self._on_variable_changed, Qt.UniqueConnection
        )

    def clear_editor(self):
        current = self.editor_stack.currentWidget()
        try:
            current.variable_changed.disconnect(self._on_variable_changed)
        except TypeError:
            pass
        current.set_data(None)

    @Slot()
    def _on_variable_changed(self):
        """User edited the current variable in editor."""
        assert 0 <= self.selected_index <= len(self.variables_model)
        editor = self.editor_stack.currentWidget()
        var, transform = editor.get_data()
        model = self.variables_model
        midx = model.index(self.selected_index, 0)
        model.setData(midx, transform, TransformRole)
        self._store_transform(var, transform)
        self._invalidate()

    def _store_transform(self, var, transform):
        # type: (Variable, List[Transform]) -> None
        self._domain_change_store[deconstruct(var)] = [deconstruct(t) for t in transform]

    def _restore_transform(self, var):
        # type: (Variable) -> List[Transform]
        tr_ = self._domain_change_store.get(deconstruct(var), [])