I have a JavaFX application that has various TextField widgets in the main frame. I have a MenuBar that includes the MenuItem objects "Copy" and "Paste" like a standard production application would have. Since any or none of the various TextField objects could be selected at any given time, it seems easier to just hardcode a "Ctrl+C" or "Ctrl+V" key press in the setOnAction events of the "Copy" and "Paste" MenuItem objects rather than use a Clipboard object and loop iterating through all TextFields to find the highlighted text (if any).
Is there a way to hardcode this key press action in Java? I looked into the KeyCombination class but it does not actually trigger the action described by the given key combination.
I think by "Since any or none of the various TextField objects could be selected at any given time" you are referring to which (if any) text field has the keyboard focus.
You can easily get this information from the scene: just do
Node focusOwner = scene.getFocusOwner();
if (focusOwner instanceof TextField) {
TextField textField = (TextField) focusOwner ;
String selectedText = textField.getSelectedText();
// ...
}
Note also that TextInputControl defines a copy() method that copies the selected text to the system clipboard. (Similarly, there's a paste() method too.) So you can leverage those to make the functionality easy.
Here's a SSCCE:
import javafx.application.Application;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.control.TextField;
import javafx.scene.control.TextInputControl;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class FocusMenuTest extends Application {
#Override
public void start(Stage primaryStage) {
BorderPane root = new BorderPane();
VBox textFields = new VBox(5, new TextField("One"), new TextField("Two"), new TextField("Three"));
MenuBar menuBar = new MenuBar();
Menu edit = new Menu("Edit");
MenuItem copy = new MenuItem("Copy");
copy.setOnAction(e -> {
Node focusOwner = menuBar.getScene().getFocusOwner();
if (focusOwner instanceof TextInputControl) {
((TextInputControl)focusOwner).copy();
}
});
MenuItem paste = new MenuItem("Paste");
paste.setOnAction(e -> {
Node focusOwner = menuBar.getScene().getFocusOwner();
if (focusOwner instanceof TextInputControl) {
((TextInputControl)focusOwner).paste();
}
});
menuBar.getMenus().add(edit);
edit.getItems().addAll(copy, paste);
root.setCenter(textFields);
root.setTop(menuBar);
Scene scene = new Scene(root, 400, 400);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Related
I have a javafx listview where each listcell contains a graphic with several nodes. One of those nodes is a Textfield. When a textfield is given focus (the user clicks on it), I would like the listcell it's located in to also get selected. I haven't been able to find a general way to achieve this in javafx.
I am able to achieve what I want by hard-coding in a way to get all the information needed to select the item I want, but I would like to avoid this if there is a better way. Below is what I needed to do in my more complex app...
Parent skin = this.getParent().getParent().getParent().getParent();
int index = skin.getParent().getChildrenUnmodifiable().indexOf(skin);
ListView listview = (ListView)
skin.getParent().getParent().getParent().getParent();
listview.getSelectionModel().select(index);
Here's a simple app that hopefully illustrates the issue. Any help would be greatly appreciated.
package uitesting;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.control.TextField;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class testSelection extends Application {
public static void main(String[] args){
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
AnchorPane pane = new AnchorPane();
ListView<String> viewer = new ListView<>();
AnchorPane.setTopAnchor(viewer,5D);AnchorPane.setLeftAnchor(viewer,5D);
AnchorPane.setBottomAnchor(viewer,5D);AnchorPane.setRightAnchor(viewer,5D);
pane.getChildren().add(viewer); // Add listview to root pane
ObservableList<String> viewItems = FXCollections.observableArrayList(
"Lorem Ipsum",
"I would like the cell this is located in to get selected when this text is clicked while the cell is not selected.",
"A third listcell");
viewer.setItems(viewItems);
// Modify the cell factory
viewer.setCellFactory((e)->new myListCell());
// create and start the stage
primaryStage.setTitle("Test GUI");
primaryStage.setScene(new Scene(pane, 600, 300));
primaryStage.show();
}
static VBox createGraphic(String text){
// Put together an example pane with a button and a textfield that will go into each listcell
Button buttonA = new Button("A Button");
TextField textField = new TextField(text);
textField.setEditable(false);
VBox root = new VBox();
root.getChildren().addAll(buttonA,textField);
return root;
}
}
class myListCell extends ListCell<String>{
#Override
public void updateItem(String item, boolean empty) {
super.updateItem(item, empty);
if (item == null || empty) {
setText(null);
setGraphic(null);
} else {
setText(null);
setGraphic(testSelection.createGraphic(item));
}
}
}
I want to bind a CheckMenuItem's selectedProperty to another observable value, like cmi.selectedProperty().bind(myObs). However, this is not possible, since the framework sets the selection property when the check menu item is clicked (see line 1394 of ContextMenuContent.java).
Is there a way to intercept the click—so that I can do my own custom processing—and still bind the selection property to another observable?
I suppose I'm thinking of the click as a request to update some state. The user clicks the menu item, then the program attempts to change some state accordingly, and the selection changes if the state successfully updated. Under 'normal' conditions, the check should toggle upon every click; however, if something bad happens, I'd prefer that the check doesn't toggle and instead reflects the true state of the program.
One way to do this (without getting into writing a skin for the menu item) is to roll your own menu item with a graphic. You can just use a region for the graphic and steal the CSS from the standard modena stylesheet. Then bind the visible property of the graphic to the observable value, and toggle the observable value in the menu item's action handler:
import java.util.Random;
import javafx.application.Application;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Region;
import javafx.stage.Stage;
public class VetoableMenuItemWithCheck extends Application {
#Override
public void start(Stage primaryStage) {
BorderPane root = new BorderPane();
MenuBar menuBar = new MenuBar() ;
Menu choices = new Menu("Choices");
// observable boolean value to which we're going to bind:
BooleanProperty selected = new SimpleBooleanProperty();
// graphic for displaying checkmark
Region checkmark = new Region();
checkmark.getStyleClass().add("check-mark");
// bind visibility of graphic to observable value:
checkmark.visibleProperty().bind(selected);
MenuItem option = new MenuItem("Option", checkmark);
choices.getItems().add(option);
Random rng = new Random();
// when menu item action occurs, randomly fail (with error alert),
// or update boolean property (which will result in toggling check mark):
option.setOnAction(e -> {
if (rng.nextDouble() < 0.25) {
Alert alert = new Alert(AlertType.ERROR, "I'm sorry Dave, I'm afraid I can't do that", ButtonType.OK);
alert.showAndWait();
} else {
selected.set(! selected.get());
}
});
menuBar.getMenus().add(choices);
root.setTop(menuBar);
Scene scene = new Scene(root, 400, 400);
scene.getStylesheets().add("check-menu.css");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
and
check-menu.css:
.check-mark {
-fx-background-color: -fx-mark-color;
-fx-shape: "M0,5H2L4,8L8,0H10L5,10H3Z";
-fx-scale-shape: false;
-fx-padding: 0em 0.11777em 0em 0em;
}
There may be a simpler approach, but this seems not too bad.
A version for a vetoable radio menu item could follow the same basic idea, but with
ObjectProperty<MenuItem> selectedItem = new SimpleObjectProperty<>();
and then for each menu item do
checkmark.visibleProperty().bind(selectedItem.isEqualTo(option));
option.setOnAction(e -> {
if (successful()) {
selectedItem.set(option);
}
});
To get an idea of what I want
When the textfield is clicked, the dropdown appears with suggestions that are filtered out as the user types in the text field. The height of the box should also adjust real-time to either contain all of the items, or a maximum of 10 items.
I managed to get this somewhat working using a ComboBox, but it felt a bit rough around the edges and it didn't seem possible to do what I wanted (The dropdown doesn't resize unless you close it and re-open it).
New idea, have a text field and then show a VBox of buttons as the dropdown. The only problem is that I don't know how to position the dropdown so that it doest stay in the noral flow so it can overlay any exisiting elements below the text field. Any ideas?
Please consider this Example, you can take the idea and apply it to your project.
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class SearchFormJavaFX extends Application{
#Override
public void start(Stage ps) throws Exception {
String[] options = {"How do I get a passport",
"How do I delete my Facebook Account",
"How can I change my password",
"How do I write some code in my question :D"};
// note that you don't need to stick to these types of containers, it's just an example
StackPane root = new StackPane();
GridPane container = new GridPane();
HBox searchBox = new HBox();
////////////////////////////////////////////////////
TextField text = new TextField();
// add a listener to listen to the changes in the text field
text.textProperty().addListener((observable, oldValue, newValue) -> {
if(container.getChildren().size()>1){ // if already contains a drop-down menu -> remove it
container.getChildren().remove(1);
}
container.add(populateDropDownMenu(newValue, options),0,1); // then add the populated drop-down menu to the second row in the grid pane
});
// those buttons just for example
// note that you can add action listeners to them ..etc
Button close = new Button("X");
Button search = new Button("Search");
searchBox.getChildren().addAll(text,close,search);
/////////////////////////////////////////////////
// add the search box to first row
container.add(searchBox, 0, 0);
// the colors in all containers only for example
container.setBackground(new Background(new BackgroundFill(Color.GRAY, null,null)));
////////////////////////////////////////////////
root.getChildren().add(container);
Scene scene = new Scene(root, 225,300);
ps.setScene(scene);
ps.show();
}
// this method searches for a given text in an array of Strings (i.e. the options)
// then returns a VBox containing all matches
public static VBox populateDropDownMenu(String text, String[] options){
VBox dropDownMenu = new VBox();
dropDownMenu.setBackground(new Background(new BackgroundFill(Color.GREEN, null,null))); // colors just for example
dropDownMenu.setAlignment(Pos.CENTER); // all these are optional and up to you
for(String option : options){ // loop through every String in the array
// if the given text is not empty and doesn't consists of spaces only, as well as it's a part of one (or more) of the options
if(!text.replace(" ", "").isEmpty() && option.toUpperCase().contains(text.toUpperCase())){
Label label = new Label(option); // create a label and set the text
// you can add listener to the label here if you want
// your user to be able to click on the options in the drop-down menu
dropDownMenu.getChildren().add(label); // add the label to the VBox
}
}
return dropDownMenu; // at the end return the VBox (i.e. drop-down menu)
}
public static void main(String[] args) {
launch();
}
}
What you're trying to do has already been implemented, and is included in ControlsFx. It's open source, and I think it would suit you need. It looks some what like this
You can even add custom nodes to it, so that cross can be done too.
public void pushEmails(TextField Receptient) {
ArrayList<CustomTextField> list = new ArrayList<>();
for (int i = 0; i < Sendemails.size(); i++) {
CustomTextField logo=new CustomTextField(Sendemails.get(i));
ImageView logoView=new ImageView(new Image("/Images/Gmail.png"));
logo.setRight(logoView);
list.add(logo);
}
TextFields.bindAutoCompletion(Receptient, list);
}
I have a TextField and a ListView. As the user types in the TextField, suggestions come up in the ListView:
When the TextField is empty, the ListView disappears, by setting the visible and managed properties to false.
However, when the user starts to type, the ListView takes up space and pushes everything down. Using .setManaged(false) allows it not to take up any space, but it doesn't display anymore, as I haven't defined a position for it. I have tried setting the layoutX and layoutY of the search list, but it still doesn't display.
Ideally I'd like the ListView's position to be affected by the layout but not to take up any space.
Any ideas?
Wrap the container that holds the text field(s) in an AnchorPane. Add the ListView to the AnchorPane after the text field container (so it stays on top). Then you need to position the ListView appropriately relative to the text field when you make it visible; I think the best way to do this is to first convert the bounds of the text field from local coordinates to Scene coordinates, then convert those bounds to the coordinates relative to the AnchorPane.
Here's an SSCCE:
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.geometry.Bounds;
import javafx.geometry.Insets;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ListView;
import javafx.scene.control.TextField;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class SuggestionList extends Application {
#Override
public void start(Stage primaryStage) {
AnchorPane root = new AnchorPane();
ListView<String> suggestionBox = new ListView<>();
suggestionBox.getItems().addAll("Here", "Are", "Some", "Suggestions");
suggestionBox.setMaxHeight(100);
suggestionBox.setVisible(false);
// Grid pane to hold a bunch of text fields:
GridPane form = new GridPane();
for (int i=0; i<10; i++) {
form.addRow(i, new Label("Enter Text:"), createTextField(suggestionBox));
}
// just move the grid pane a little to test suggestion box positioning:
AnchorPane.setLeftAnchor(form, 20.0);
AnchorPane.setRightAnchor(form, 20.0);
AnchorPane.setTopAnchor(form, 20.0);
AnchorPane.setBottomAnchor(form, 20.0);
// allows focus on grid pane, so user can click on it to remove focus from text field.
form.setFocusTraversable(true);
root.setPadding(new Insets(20));
root.getChildren().addAll(form, suggestionBox);
Scene scene = new Scene(root, 600, 400);
primaryStage.setScene(scene);
primaryStage.show();
}
private TextField createTextField(ListView<String> suggestionBox) {
TextField textField = new TextField();
ChangeListener<String> selectionListener = (obs, oldItem, newItem) -> {
if (newItem != null) {
textField.setText(newItem);
}
};
textField.focusedProperty().addListener((obs, wasFocused, isNowFocused) -> {
if (isNowFocused) {
suggestionBox.setVisible(true);
// compute bounds of text field relative to suggestion box's parent:
Parent parent = suggestionBox.getParent(); // (actually the anchor pane)
Bounds tfBounds = textField.getBoundsInLocal();
Bounds tfBoundsInScene = textField.localToScene(tfBounds);
Bounds tfBoundsInParent = parent.sceneToLocal(tfBoundsInScene);
// position suggestion box:
suggestionBox.setLayoutX(tfBoundsInParent.getMinX());
suggestionBox.setLayoutY(tfBoundsInParent.getMaxY());
suggestionBox.setPrefWidth(tfBoundsInParent.getWidth());
suggestionBox.getSelectionModel().selectedItemProperty().addListener(selectionListener);
} else {
suggestionBox.setVisible(false);
suggestionBox.getSelectionModel().selectedItemProperty().removeListener(selectionListener);
}
});
textField.setOnAction(event -> {
suggestionBox.setVisible(false);
suggestionBox.getSelectionModel().selectedItemProperty().removeListener(selectionListener);
});
return textField ;
}
public static void main(String[] args) {
launch(args);
}
}
You might be able to use similar positional tricks and just add it to the same scene, with managed set to false.
Is there any way to add a changelistener to group of nodes for following changes?
For example, we can add a changelistener to a tabpane for getting tabselectedproperty.
I want to add changelistener a to a group of buttons for getting buttonActionedProperty! I want to get old button and new button....
Is there any way to do this?
When you compare the tabs in a tab pane to a collection of buttons, you're not really comparing like to like. A tab pane naturally has a sense of which tab is currently selected; buttons just generate events when they are pressed.
If you want your buttons to have a "selected" state, and want a collection of those grouped together so that only one is selected, then consider using ToggleButtons instead. You can put the toggle buttons into a ToggleGroup and register a listener with the toggle group's selectedToggle property:
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.ToggleButton;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
public class ToggleButtonDemo extends Application {
#Override
public void start(Stage primaryStage) {
ToggleButton apples = new ToggleButton("Apples");
ToggleButton oranges = new ToggleButton("Oranges");
ToggleButton pears = new ToggleButton("Pears");
ToggleGroup fruitToggleGroup = new ToggleGroup();
fruitToggleGroup.getToggles().addAll(apples, oranges, pears);
fruitToggleGroup.selectedToggleProperty().addListener((obs, oldToggle, newToggle) ->
System.out.println("Selected toggle changed from "+oldToggle+" to "+newToggle));
HBox root = new HBox(5, apples, oranges, pears);
root.setAlignment(Pos.CENTER);
Scene scene = new Scene(root, 350, 75);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
If you really just want buttons, and don't have the notion of one of them being selected (I find it hard to see a use case for this), you can just create an ObjectProperty<Button> to store the last button on which an action occurred. Register an event listener with each button to update the property:
import javafx.application.Application;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
public class LastActionTrackingDemo extends Application {
#Override
public void start(Stage primaryStage) {
Button apples = new Button("Apples");
Button oranges = new Button("Oranges");
Button pears = new Button("Pears");
ObjectProperty<Button> lastActionedButton = new SimpleObjectProperty<>();
EventHandler<ActionEvent> buttonActionHandler = event ->
lastActionedButton.set((Button) event.getSource());
apples.addEventHandler(ActionEvent.ACTION, buttonActionHandler);
oranges.addEventHandler(ActionEvent.ACTION, buttonActionHandler);
pears.addEventHandler(ActionEvent.ACTION, buttonActionHandler);
lastActionedButton.addListener((obs, oldButton, newButton) ->
System.out.println("Button changed from "+oldButton+" to "+newButton));
HBox root = new HBox(5, apples, oranges, pears);
root.setAlignment(Pos.CENTER);
Scene scene = new Scene(root, 350, 75);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Note there is a subtle different between the appearance of the two demos. The first (with toggle buttons) has a visual representation of which button is selected. The second does not. In both cases you can still set action listeners on the buttons if you need that functionality. There is also a (less subtle) difference in behavior: the toggle buttons can be "unselected"; so if you press the same toggle button twice, the selection goes back to null. This doesn't happen with the buttons.