I have such code:
columnNumber.setCellFactory(TextFieldTableCell.<Record>forTableColumn());
columnNumber.setOnEditCommit(
(TableColumn.CellEditEvent<Record, String> t) -> {
((Record) t.getTableView().getItems().get(
t.getTablePosition().getRow())
).setNumber(t.getNewValue());
});
It is necessary that after pressing the Enter button and in case of inputting non-number, would be displayed a message, and then editing is not canceled, but entering a value would continue.. Like that:
columnNumber.setOnEditCommit(
(TableColumn.CellEditEvent<Record, String> t) -> {
if(!NumberUtils.isNumber(t.getNewValue())){
Alert alert = new Alert(Alert.AlertType.INFORMATION);
alert.setTitle("");
alert.setHeaderText("Error");
alert.setContentText("Please enter the number");
alert.showAndWait();
}else {
((Record) t.getTableView().getItems().get(
t.getTablePosition().getRow())
).setNumber(t.getNewValue());
}
});
But I can't figure out how to make the continue entering.
Related
I have created this methode for Email validation
The issue is that the Alert displayed goes on the top of the previous fxml instead of the same and the user have to fulfill all the fields again
I have this method
public boolean validateEmail() {
Pattern p = Pattern.compile("[a-zA-Z0-9][a-zA-Z0-9._]*#[a-zA-Z0-9]+([.][a-zA-Z]+)+");
Matcher m = p.matcher(emailField.getText());
if (m.find() && m.group().equals(emailField.getText())) {
return true;
} else {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Validation of Email");
alert.setHeaderText(null);
alert.setContentText("Please enter a valid Email");
alert.showAndWait();
return false;
}
}
I have a button which onAction calls the method below
public void showSubscription() throws IOException {
Dialog<ButtonType> dialog = new Dialog<>();
dialog.setTitle("New Subscription");
dialog.setHeaderText("Please Fulfill your information to subscribe");
FXMLLoader fxmlLoader = new FXMLLoader();
fxmlLoader.setLocation(getClass().getResource("Registration.fxml"));
try {
dialog.getDialogPane().setContent(fxmlLoader.load());
} catch (IOException e) {
System.out.println("Couldn't load the Dialog");
e.printStackTrace();
return;
}
dialog.getDialogPane().getButtonTypes().add(ButtonType.OK);
dialog.getDialogPane().getButtonTypes().add(ButtonType.CANCEL);
Optional<ButtonType> result = dialog.showAndWait();
if (result.isPresent() && result.get()==ButtonType.OK) {
RegistrationController controller = fxmlLoader.getController();
if (controller.validateEmail()) {
controller.loadRegistration();
Alert alert = new Alert(Alert.AlertType.INFORMATION);
alert.setTitle("Information");
alert.setHeaderText(null);
alert.setContentText("Subscription Done Correctly");
alert.showAndWait();
}
}
else {
System.out.println("CANCEL pressed");
}
}
I don't know what to add to make this Alert popup in the same Registration.fxml and not go back to the previous one.
Alert inherits an initOwner(Window) method from Dialog. So you can call initOwner(...) and pass in the window responsible for showing the dialog. There's no direct reference to this, but you can get it from the scene containing the dialog's dialog pane:
alert.initOwner(dialog.getDialogPane().getScene().getWindow());
This line just needs to be called sometime before alert.showAndWait().
If you need the Alert created in the validateEmail() method to have the same owner, just pass a reference to the appropriate window to that method:
public boolean validateEmail(Window mainWindow) {
// ...
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.initOwner(mainWindow);
// ...
alert.showAndWait();
// ...
}
and
RegistrationController controller = fxmlLoader.getController();
if (controller.validateEmail(dialog.getDialogPane().getScene().getWindow())) {
// ...
}
I have customized a Hyperlink cell here. I want the tableview to select the content when I click this link, but after I add Hyperlink, the tableview's selected seems to be invalid.
tb_uGoodUrl.setCellFactory(new Callback<TableColumn<GoodModel, String>, TableCell<GoodModel, String>>() {
#Override
public TableCell<GoodModel, String> call(TableColumn<GoodModel, String> param) {
TableCell<GoodModel, String> cell = new TableCell<GoodModel, String>() {
private final Hyperlink hyperlink = new Hyperlink();
{
hyperlink.setOnMouseClicked(event -> {
if(event.getClickCount() == 2){
String url = getItem();
hostServices.showDocument(url);
}
});
}
#Override
protected void updateItem(String item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setGraphic(null);
}else {
hyperlink.setText(getItem());
setGraphic(hyperlink);
}
}
};
return cell;
}
});
Click on the link, the cell is not selected
If the cell is not selected, a null exception will be reported when the following code is used.
TablePosition pos = tableView.getSelectionModel().getSelectedCells().get(0);
int row = pos.getRow();
// Item here is the table view type:
GoodModel item = tableView.getItems().get(row);
TableColumn col = pos.getTableColumn();
// this gives the value in the selected cell:
String data = (String) col.getCellObservableValue(item).getValue();
The effect you want to achieve is as follows
Rendering
You can manually select the cell, using the table's selection model, when the Hyperlink is clicked on.
// Assuming this code is inside a TableCell implementation
hyperlink.setOnAction(event -> {
event.consume();
getTableView().getSelectionModel().select(getIndex(), getTableColumn());
// show your document
});
I used the onAction property which will be fired when the Hyperlink has been clicked once. This is typical behavior for a hyperlink, but if you want to only perform the action on a double-click then you can keep using your onMouseClicked handler.
Note the above does not take into account multiple-selection mode.
So I followed this example on using context menu with TableViews from here. I noticed that using this code
row.contextMenuProperty().bind(Bindings.when(Bindings.isNotNull(row.itemProperty()))
.then(rowMenu)
.otherwise((ContextMenu)null));
does not show up on first right click on a row with values. I need to right click on that row again for the context menu to show up. I also tried this code(which is my first approach, but not using it anymore because I've read somewhere that that guide is the best/good practice for anything related about context menu and tableview), and it displays the context menu immediately
if (row.getItem() != null) {
rowMenu.show(row, event.getScreenX(), event.getScreenY());
}
else {
// do nothing
}
but my problem with this code is it throws a NullPointerException whenever i try to right click on a row that has no data.
What could I possibly do to prevent NullPointerException while having the context menu show up immediately after a right click? In my code, I also have a code that a certain menu item in the context menu will be disabled based on the property of the myObject binded to row, that's why i need the context menu to pop up right away.
I noticed this too with the first block of code. Even if the property of myObject has already changed, it still has a menu item enabled/disabled unless I right click on that row again. I hope that you could help me. Thank you!
Here is a MCVE:
public class MCVE_TableView extends Application{
#Override
public void start(Stage primaryStage) throws Exception {
BorderPane myBorderPane = new BorderPane();
TableView<People> myTable = new TableView<>();
TableColumn<People, String> nameColumn = new TableColumn<>();
TableColumn<People, Integer> ageColumn = new TableColumn<>();
ContextMenu rowMenu = new ContextMenu();
ObservableList<People> peopleList = FXCollections.observableArrayList();
peopleList.add(new People("John Doe", 23));
nameColumn.setMinWidth(100);
nameColumn.setCellValueFactory(
new PropertyValueFactory<>("Name"));
ageColumn.setMinWidth(100);
ageColumn.setCellValueFactory(
new PropertyValueFactory<>("Age"));
myTable.setItems(peopleList);
myTable.getColumns().addAll(nameColumn, ageColumn);
myTable.setRowFactory(tv -> {
TableRow<People> row = new TableRow<>();
row.setOnContextMenuRequested((event) -> {
People selectedRow = row.getItem();
rowMenu.getItems().clear();
MenuItem sampleMenuItem = new MenuItem("Sample Button");
if (selectedRow != null) {
if (selectedRow.getAge() > 100) {
sampleMenuItem.setDisable(true);
}
rowMenu.getItems().add(sampleMenuItem);
}
else {
event.consume();
}
/*if (row.getItem() != null) { // this block comment displays the context menu instantly
rowMenu.show(row, event.getScreenX(), event.getScreenY());
}
else {
// do nothing
}*/
// this requires the row to be right clicked 2 times before displaying the context menu
row.contextMenuProperty().bind(Bindings.when(Bindings.isNotNull(row.itemProperty()))
.then(rowMenu)
.otherwise((ContextMenu)null));
});
return row;
});
myBorderPane.setCenter(myTable);
Scene scene = new Scene(myBorderPane, 500, 500);
primaryStage.setTitle("MCVE");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main (String[] args) {
launch(args);
}
}
Here is the People Class
public class People {
SimpleStringProperty name;
SimpleIntegerProperty age;
public People(String name, int age) {
this.name = new SimpleStringProperty(name);
this.age = new SimpleIntegerProperty(age);
}
public SimpleStringProperty NameProperty() {
return this.name;
}
public SimpleIntegerProperty AgeProperty() {
return this.age;
}
public String getName() {
return this.name.get();
}
public int getAge() {
return this.age.get();
}
}
Edit: MCVE added
Edit2: Updated the MCVE. Still requires to be right-clicked twice before the contextMenu pops up
Below's a code snippet as a quick demonstration of how-to/where-to instantiate and configure a per-row ContextMenu. It
creates a ContextMenu/MenuItem for each TableRow at the row's instantiation time
creates a conditional binding that binds the menu to the row's contextMenuProperty if not empty (just the same as you did)
configures the contextMenu in an onShowing handler, depending on the current item (note: no need for a guard against null, because the conditional binding will implicitly guarantee to not show the the menu in that case)
The snippet:
myTable.setRowFactory(tv -> {
TableRow<People> row = new TableRow<>() {
ContextMenu rowMenu = new ContextMenu();
MenuItem sampleMenuItem = new MenuItem("Sample Button");
{
rowMenu.getItems().addAll(sampleMenuItem);
contextMenuProperty()
.bind(Bindings
.when(Bindings.isNotNull(itemProperty()))
.then(rowMenu).otherwise((ContextMenu) null));
rowMenu.setOnShowing(e -> {
People selectedRow = getItem();
sampleMenuItem.setDisable(selectedRow.getAge() > 100);
});
}
};
return row;
});
I have this class that generates a Alert Dialog with a field to enter a password, and want to activate the OK button when pressing Enter on the password field.
public class PasswordDialog extends Dialog<String> {
private PasswordField passwordField;
public PasswordDialog(boolean usuario) {
setTitle("Senha");
if (usuario == true){
setHeaderText("Por favor insira a senha do usuário.");
}else{
setHeaderText("Por favor insira a senha do administrador.");
}
ButtonType passwordButtonType = new ButtonType("OK", ButtonData.OK_DONE);
getDialogPane().getButtonTypes().addAll(passwordButtonType, ButtonType.CANCEL);
passwordField = new PasswordField();
passwordField.setPromptText("Password");
HBox hBox = new HBox();
hBox.getChildren().add(passwordField);
hBox.setPadding(new Insets(20));
HBox.setHgrow(passwordField, Priority.ALWAYS);
getDialogPane().setContent(hBox);
Platform.runLater(() -> passwordField.requestFocus());
setResultConverter(dialogButton -> {
if (dialogButton == passwordButtonType) {
return passwordField.getText();
}
return null;
});
}
public PasswordField getPasswordField() {
return passwordField;
}
}
Actually this should happen by default (at least that's the behaviour on JavaFX 11/Win 10), but you can also close the Dialog yourself by calling setResult and close.
Example closing on arrow keys:
// in constructor
passwordField.setOnKeyPressed(evt -> {
if (evt.getCode().isArrowKey()) {
setResult(passwordField.getText());
close();
}
});
For closing on pressing enter, use the onAction event of the PasswordField:
// in constructor
passwordField.setOnAction(evt -> {
setResult(passwordField.getText());
close();
});
For more complicated behaviour of the resultConverter, you could also use it for setting the result to avoid duplicate code:
setResult(getResultConverter().call(passwordButtonType));
I am making an application using Scenebuilder with JavaFX.
I have three inputs for a TableView:
Two TextField input1, input2.
One DatePicker.
When one or more of the input fields is empty and i click on the addButton, the object is added to the TableView.
How do I show an error popup which appears whenever i click on addButton and at least one field (input1, input2) is empty ?
addButton.setOnAction(new EventHandler<ActionEvent>() {
#Override public void handle(ActionEvent e) {
if ((input1.getText() != null && !input1.getText().isEmpty()) &&
(input2.getText() != null && !input2.getText().isEmpty())){
//ADD CODE TO ADD THE ITEM HERE!
} else {
Alert alert = new Alert(AlertType.INFORMATION);
alert.setTitle("Input fields empty");
alert.setContentText("Please fill all input fields");
alert.showAndWait();
}
}
});
PS : Here you can find different Alert Types depending on your needs.