Why not adding css class for table poster red border cell error?

JavaFX 2.2.21 Java 7.21

I'm trying to display a red border and a picture on a cell text when an error occurs.

I took the address book example (example 12-11 http://docs.oracle.com/javafx/2/ui_controls/table-view.htm#CJAGAAEE).

and also James D solution to my previous question.

I find that adding a class of css error does not display the red border and the image.

However, using setStyle this - but it is not preferable, because I want to put the border value by default once the error is corrected.

In the example below, red border does NOT appear. The 'name' field was changed to salary and must display one error (red border and image) if other thing that an integer is entered.

If you uncomment the setStyle lines, then it is displayed.

Note: I use empty.png to erase the image of 'failure' because using - fx-background-image: none; somehow, did not.

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TableColumn.CellEditEvent;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.control.Button;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.util.Callback;
public class TableViewSample extends Application {


    private TableView<Person> table = new TableView<Person>();
    private final ObservableList<Person> data =
            FXCollections.observableArrayList(
            new Person("Gates", "46", "[email protected]"),
            new Person("Ellison", "25", "[email protected]"),
            new Person("McNealy", "1", "[email protected]"),
            new Person("Jobs", "0", "[email protected]"),
            new Person("Me", "0", "[email protected]"));
    final HBox hb = new HBox();


    public static void main(String[] args) {
        launch(args);
    }


    @Override
    public void start(Stage stage) {
        Scene scene = new Scene(new Group());
        stage.setTitle("Table View Sample");
        stage.setWidth(450);
        stage.setHeight(550);


        final Label label = new Label("Address Book");
        label.setFont(new Font("Arial", 20));


        table.setEditable(true);
        Callback<TableColumn, TableCell> cellFactory =
                new Callback<TableColumn, TableCell>() {
            public TableCell call(TableColumn p) {
                return new EditingCell();
            }
        };


        TableColumn firstNameCol = new TableColumn("First Name");
        firstNameCol.setMinWidth(100);
        firstNameCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("firstName"));
        firstNameCol.setCellFactory(cellFactory);
        firstNameCol.setOnEditCommit(
                new EventHandler<CellEditEvent<Person, String>>() {
            @Override
            public void handle(CellEditEvent<Person, String> t) {
                ((Person) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())).setFirstName(t.getNewValue());
            }
        });




        TableColumn salaryCol = new TableColumn("Salary");
        salaryCol.setMinWidth(100);
        salaryCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("salary"));
        salaryCol.setCellFactory(cellFactory);
        salaryCol.setOnEditCommit(
                new EventHandler<CellEditEvent<Person, String>>() {
            @Override
            public void handle(CellEditEvent<Person, String> t) {
                ((Person) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())).setSalary(t.getNewValue());
            }
        });


        TableColumn emailCol = new TableColumn("Email");
        emailCol.setMinWidth(200);
        emailCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("email"));
        emailCol.setCellFactory(cellFactory);
        emailCol.setOnEditCommit(
                new EventHandler<CellEditEvent<Person, String>>() {
            @Override
            public void handle(CellEditEvent<Person, String> t) {
                ((Person) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())).setEmail(t.getNewValue());
            }
        });


        table.setItems(data);
        table.getColumns().addAll(firstNameCol, salaryCol, emailCol);


        final TextField addFirstName = new TextField();
        addFirstName.setPromptText("First Name");
        addFirstName.setMaxWidth(firstNameCol.getPrefWidth());
        final TextField addSalary = new TextField();
        addSalary.setMaxWidth(salaryCol.getPrefWidth());
        addSalary.setPromptText("Last Name");
        final TextField addEmail = new TextField();
        addEmail.setMaxWidth(emailCol.getPrefWidth());
        addEmail.setPromptText("Email");


        final Button addButton = new Button("Add");
        addButton.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent e) {
                data.add(new Person(
                        addFirstName.getText(),
                        addSalary.getText(),
                        addEmail.getText()));
                addFirstName.clear();
                addSalary.clear();
                addEmail.clear();
            }
        });


        hb.getChildren().addAll(addFirstName, addSalary, addEmail, addButton);
        hb.setSpacing(3);


        final VBox vbox = new VBox();
        vbox.setSpacing(5);
        vbox.setPadding(new Insets(10, 0, 0, 10));
        vbox.getChildren().addAll(label, table, hb);


        ((Group) scene.getRoot()).getChildren().addAll(vbox);
        scene.getStylesheets().add(getClass().getResource("errorTextField.css").toExternalForm());


        stage.setScene(scene);
        stage.show();
    }


    public static class Person {


        private final SimpleStringProperty firstName;
        private final SimpleStringProperty salary;
        private final SimpleStringProperty email;


        private Person(String fName, String pay, String email) {
            this.firstName = new SimpleStringProperty(fName);
            this.salary = new SimpleStringProperty(pay);
            this.email = new SimpleStringProperty(email);
        }


        public String getFirstName() {
            return firstName.get();
        }


        public void setFirstName(String fName) {
            firstName.set(fName);
        }


        public String getSalary() {
            return salary.get();
        }


        public void setSalary(String fName) {
            salary.set(fName);
        }


        public String getEmail() {
            return email.get();
        }


        public void setEmail(String fName) {
            email.set(fName);
        }
    }


    class EditingCell extends TableCell<Person, String> {


        final String errorCSSClass = "error";
        private TextField textField;


        public EditingCell() {
        }


        @Override
        public void startEdit() {
            if (!isEmpty()) {
                super.startEdit();
                createTextField();
                setText(null);
                setGraphic(textField);
                textField.selectAll();
            }
        }


        @Override
        public void cancelEdit() {
            super.cancelEdit();


            setText((String) getItem());
            setGraphic(null);
        }


        @Override
        public void updateItem(String item, boolean empty) {
            super.updateItem(item, empty);


            if (empty) {
                setText(null);
                setGraphic(null);
            } else {
                if (isEditing()) {
                    if (textField != null) {
                        textField.setText(getString());
                    }
                    setText(null);
                    setGraphic(textField);
                } else {
                    setText(getString());
                    setGraphic(null);
                }
            }
        }


        private boolean validate(String text) {
            try {
                Integer.parseInt(text);
            } catch (NumberFormatException ne) {
                return false;
            }
            return true;
        }


        private void createTextField() {
            textField = new TextField(getString());
            textField.setMinWidth(this.getWidth() - this.getGraphicTextGap() * 2);
            textField.focusedProperty().addListener(new ChangeListener<Boolean>() {
                @Override
                public void changed(ObservableValue<? extends Boolean> arg0,
                        Boolean arg1, Boolean arg2) {
                    if (!arg2) {
                        commitEdit(textField.getText());
                        boolean valid = validate(textField.getText());
                        if (!valid) {
                            if (!getStyleClass().contains(errorCSSClass)) {
                                getStyleClass().add(errorCSSClass);
                            }
//                            setStyle("-fx-border-color: red; -fx-background-image:url('fail.png'); -fx-background-repeat: no-repeat; -fx-background-position: right center;");
                        } else {
                            getStyleClass().remove(errorCSSClass);
//                            setStyle("-fx-border-color: gray;  -fx-background-image:url('empty.png');");
                        }
                    }
                }
            });
            textField.setOnKeyReleased(new EventHandler<KeyEvent>() {
                @Override
                public void handle(KeyEvent event) {
                    if ((event.getCode() == KeyCode.ENTER)) {
                        commitEdit(textField.getText());
                        boolean valid = validate(textField.getText());
                        if (!valid) {
                            if (!getStyleClass().contains(errorCSSClass)) {
                                getStyleClass().add(errorCSSClass);
                            }
//                            setStyle("-fx-border-color: red; -fx-background-image:url('fail.png'); -fx-background-repeat: no-repeat; -fx-background-position: right center;");
                        } else {
                            getStyleClass().remove(errorCSSClass);
//                            setStyle("-fx-border-color: gray;  -fx-background-image:url('empty.png');");
                        }
                    } else if (event.getCode() == KeyCode.ESCAPE) {
                        cancelEdit();
                    }
                }
            });
        }


        private String getString() {
            return getItem() == null ? "" : getItem().toString();
        }
    }
}

errorTextField.css

root {
    display: block;
}


.text-field.error {
-fx-border-color: red ;
  -fx-border-width: 2px ;
  -fx-background-image:url('fail.png');
  -fx-background-repeat: no-repeat;
  -fx-background-position: right center;
}
.text-field {
-fx-border-width: 0px ;
-fx-background-image:url('empty.png') ;
   -fx-background-repeat: no-repeat;
  -fx-background-position: right center;
}

The css Setup is fine. The selector

.a.b

Selects elements that have the two class a and class b. Note that in this example, you set the style on the table cell class, not on the text field. So you have the selector

.table-cell.error

You can select the cells of a table with text fields that also have the style class 'mistake' set with

.text-field.error, .table-cell.error

Tags: Java

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