private void initialize()

in kit/src/main/java/com/oracle/javafx/scenebuilder/kit/editor/panel/inspector/editors/AnchorPaneConstraintsEditor.java [214:303]
70 lines of code
15 McCabe index (conditional complexity)

        private void initialize() {
            //
            // Text field
            //
            // For SQE tests
            textField.setId(EditorUtils.toDisplayName(propMeta.getName().getName()) + " Value"); //NOI18N
            EventHandler<ActionEvent> valueListener = event -> {
                if (isHandlingError()) {
                    // Event received because of focus lost due to error dialog
                    return;
                }
                String valStr = textField.getText();
                if (valStr == null || valStr.isEmpty()) {
                    if (toggleButton.isSelected()) {
                        updateFromTextField = true;
                        toggleButton.setSelected(false);
                        updateFromTextField = false;
                    }
                    userUpdateValueProperty(null);
                    return;
                }
                textField.selectAll();
                double valDouble;
                try {
                    valDouble = Double.parseDouble(valStr);
                } catch (NumberFormatException e) {
                    handleInvalidValue(valStr, textField);
                    return;
                }
                if (!((DoublePropertyMetadata) getPropertyMeta()).isValidValue(valDouble)) {
                    handleInvalidValue(valDouble, textField);
                    return;
                }
                if (!toggleButton.isSelected()) {
                    updateFromTextField = true;
                    toggleButton.setSelected(true);
                    updateFromTextField = false;
                }
                userUpdateValueProperty(valDouble);
            };
            setNumericEditorBehavior(this, textField, valueListener, false);
            // Override default promptText
            textField.setPromptText(""); //NOI18N

            textField.setOnMouseClicked(t -> ConstraintEditor.this.toggleButton.setSelected(true));

            //
            // Toggle button
            //
            assert propMeta instanceof DoublePropertyMetadata;

            toggleButton.selectedProperty().addListener((ChangeListener<Boolean>) (ov, prevSel, newSel) -> {
//                System.out.println("toggleButton : selectedProperty changed!");
                if (isUpdateFromModel() || updateFromTextField) {
                    // nothing to do
                    return;
                }

                // Update comes from toggleButton.
                if (newSel) {
                    // Anchor selected : compute its value from the selected node
                    double anchor = 0;
                    String propName = ConstraintEditor.this.propMeta.getName().toString();
                    switch (propName) {
                        // For the moment, we don't support multi-selection with different anchors:
                        // the first instance anchor only is used.
                        case topAnchorPropName:
                            anchor = EditorUtils.computeTopAnchor(getFirstInstance());
                            break;
                        case rightAnchorPropName:
                            anchor = EditorUtils.computeRightAnchor(getFirstInstance());
                            break;
                        case bottomAnchorPropName:
                            anchor = EditorUtils.computeBottomAnchor(getFirstInstance());
                            break;
                        case leftAnchorPropName:
                            anchor = EditorUtils.computeLeftAnchor(getFirstInstance());
                            break;
                        default:
                            assert false;
                    }
                    textField.setText(EditorUtils.valAsStr(anchor));
                    userUpdateValueProperty(getValue());
                } else {
                    // Anchor unselected
                    textField.setText(null);
                    userUpdateValueProperty(null);
                }
            });
        }