When I run this code for example, it works normal:
public class AllControlsReff extends Application{
#Override
public void start(Stage Scr) throws Exception {
Scr.show();
Scr.setTitle("All Controls Reference");
ScrollPane sp = new ScrollPane();
VBox vb = new VBox(10);
TitledPane Tp;
TilePane numPad;
for(int i=0;i<20;i++){
Tp = new TitledPane();
numPad = new TilePane();
Tp.setText("English Title: " + i);
for(int j=0;j<18;j++){
numPad.setHgap(10);
numPad.setVgap(10);
numPad.setPrefColumns(9);
numPad.setStyle("-fx-font-size:20;");
Button btn = new Button("button " + j);
btn.setOnAction(e -> System.out.println("-"));
numPad.getChildren().add(btn);
}
Tp.setContent(numPad);
vb.getChildren().add(Tp);
}
sp.setContent(vb);
Scene pg = new Scene(sp,1280,720);
Scr.setScene(pg);
}
}
but when I use the same example with Arabic language, it works very slowly at runtime, hard to click on buttons or collapse the TitledPanes:
Tp.setText("عنوان بالعربية: " + i);
Button btn = new Button("العربية " + j);
I didn't test on Windows to see the different, currently I use Ubuntu, and run my Java application from terminal.
I encountered a similar slowdown on Windows 10 running Java 10 using both methods. I moved the Src.show() to the end of the start method and it seems to have fixed the initial slowdown.
I saw no discernible time delay on button presses in either case.
Related
I have a project I am working on. I am trying to make a dictionary. For that, I have a .csv file with about 55000 words.I am using the trie data structure which has a startsWith() method which checks whether there is a word in the .csv file which matches the given prefix. I had managed to get it to work to find all words that match the given prefix and display them. Now, I have to develop this into a JavaFX app.
So, I thought of using a ComboBox which has its editable attribute set to true so that I could type into it and then the handler associated with the textProperty() of its editor would display all the words starting with given prefix in the listview of the combobox.
Now, the problem I have is that whenever I click the arrow button of the combobox the application stops responding (I think it's because the list view tries to resize itself to fit the items which are 55000).
So, what I want to know is how to disable the arrow button entirely. I have tried to set its background-color to transparent but even then it can still be clicked I want to make it so that it is disabled and transparent basically the combobox ends up looking like a text field.
If there are better, more efficient ways of implementing a dictionary I would appreciate it if you could guide me.
The ListView is a virtual control that only shows a certain number of cells at a time, it doesn't need to "resize itself to the number of items" in any way that would lock up your GUI.
Does this demo program do what you want?
public class Main extends Application {
public static void main(String[] args) throws IOException, URISyntaxException {
launch(args);
}
#Override
public void start(Stage stage) {
List<String> rawWords = Collections.emptyList();
try {
URI wordURI = new URI("https://www-cs-faculty.stanford.edu/~knuth/sgb-words.txt");
BufferedReader reader = new BufferedReader(new InputStreamReader(wordURI.toURL().openStream(), StandardCharsets.UTF_8));
rawWords = reader.lines().collect(Collectors.toCollection(() -> new ArrayList<>(6000)));
} catch (IOException | URISyntaxException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
// make the list at least as big as in the question
while(rawWords.size() < 55000) {
ArrayList<String> nextWords = new ArrayList<>(rawWords.size() * 2);
nextWords.addAll(rawWords);
nextWords.addAll(rawWords);
rawWords = nextWords;
}
Collections.sort(rawWords);
ObservableList<String> wordList = FXCollections.observableArrayList(rawWords);
FilteredList<String> filteredList = new FilteredList<>(wordList);
ComboBox<String> combo = new ComboBox<>(filteredList);
combo.setEditable(true);
combo.getEditor().textProperty().addListener((obs, oldVal, newVal) -> {
filteredList.setPredicate(s -> newVal == null || newVal.isEmpty() || s.startsWith(newVal));
});
VBox vbox = new VBox(8,new Label("Dictionary ComboBox"),
combo,
new Label("\n\n\n\nThis space intentionally left blank.\n\n\n\n"));
vbox.setPadding(new Insets(8));
Scene scene = new Scene(vbox, 400, 300);
stage.setTitle("Demo - Filtered Combobox List");
stage.setScene(scene);
stage.show();
}
}
I'm trying to code a 2048 game using JavaFX and I'm facing a problem.
#Override
public void start(Stage primaryStage){
primaryStage.setResizable(false);
Scene scene = new Scene(firstContent());
primaryStage.setScene(scene);
primaryStage.show();
scene.setOnKeyPressed(new EventHandler<KeyEvent>(){
#Override
public void handle(KeyEvent e){
KeyCode key = e.getCode();
if((key.equals(KeyCode.UP))){
System.out.println("recieved UP");
Scene scene = new Scene(createContent());
primaryStage.setScene(scene);
primaryStage.show();
} else if(key.equals(KeyCode.DOWN)){
System.out.println("recieved DOWN");
}
}
});
}
So here I open my window initialised with firstContent (basically it creates an array of empty tiles, and fills two of them with 2 or 4 randomly), display it and start listening for key presses. The idea is to have a behavior for each arrow key (UP DOWN LEFT RIGHT) which will move the tiles accordingly. This is done by the following createContent() method :
public Parent createContent(){
String c = "";
List<Integer> known = new ArrayList<Integer>();
Pane root = new Pane();
root.setPrefSize(740, 700);
Random rand = new Random();
int pos1 = rand.nextInt(15);
if(tiles.get(pos1) != new Tile("")){
known.add(pos1);
pos1 = rand.nextInt(15);
if(known.contains(pos1)){
known.add(pos1);
pos1 = rand.nextInt(15);
}
}
for(int i = 0; i < NB_TILES; i++){
tiles.add(new Tile(c));
}
tiles.set(pos1, new Tile("2048"));
for(int i = 0; i < tiles.size(); i++){
// boring stuff to set the tile display to the right size
}
return root;
}
Now for the problem : when the application is running, if I press the down arrow, I do get on my terminal the "recieved DOWN" text as many times as I press the key as expected. But if I press the up arrow, the application will only recieve it once and the application seems to be frozen (meaning if I press down again, nothing happens).
As you could guess, I want to be able to call my method for each key press to be able to move my tiles around and utltimately combine them to get a playable version of 2048... Anyone know why my app gets frozen ?
If needed, I can provide other bits of code but I think I provided the essential. Just know that firstContent() works basically the same as createContent for now except it genereates two random numbers to get the first tiles of the game.
Thanks in advance for your help.
As it is my first application in javafx and trying to make a simple calculator. I want to know how I can make this for loop in easy way :
for(int i=1; i<10; i++){
Button bt1 = new Button();
bt1.setText("1");
bt1.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("1");
}
});
i 1;
}
And how to get this buttons in VBox.
I don't know why it takes a lot of time to do that
but as jewels said it should be very quick in doing that, i'm working with javafx since 9 months at work on a computer that is not very performant and, as i understand it, in the calculator you would have 10 buttons for numbers from 0 to 9, i'd code it like this:
VBox vboxForButtons = new VBox();
for(int i=0; i<10; i++){
Button btnNumber = new Button();
btnNumber.setText(String.valueOf(i));
btnNumber.setOnAction((ActionEvent)->{
System.out.println(btnNumber.getText());
});
vboxForButtons.getChildren().add(btnNumber);
}
In alternative to this, for small and slight applications i advice you to use the SceneBuilder tool linking directly the objects that you drag in the window to an FXML event in the code.
I hope this answer will help you.
You can achieve it using the following code.
VBox vbox = new VBox(); //create new VBox instance
vbox.setMinWidth(500); //set minimum width, dont think you'd need this.
for(int i=1; i<10; i++){
Button btn = new Button();
btn.setMinWidth(200);
btn.setMinHeight(50);
btn.setText("Button" + i);
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println(btn.getText()); //Or "1" as in your code
}
});
vbox.getChildren().add(btn); //add button to your VBox
}
root.getChildren().add(vbox); //root of your pane
primaryStage.setScene(scene); //primaryStage is your stage, scene is the current scene
primaryStage.show();
Edit
Reading the comments in your question about performance issue, this will not fix any of it. I have basically written the same code that you've used above, and added VBox creation and adding Button to it, because from the question it sounded like you needed help with creating VBox and adding Buttons to it.
A few days ago I started studying JavaFX, and came across the desire to perform 2 experiments. Firstly, I would like to know if it is possible to put an animated background behind an user interface. I've succeeded in creating an animated background, and now I'm having great difficulties to position some controls in the middle of my interface.
I'd like to introduce you 2 pictures of my program. The first demonstrates the undesirable result that I'm getting:
I believe this is my nodes tree:
This is the code of my application:
public class AnimatedBackground extends Application
{
// #########################################################################################################
// MAIN
// #########################################################################################################
public static void main(String[] args)
{
Application.launch(args);
}
// #########################################################################################################
// INSTÂNCIAS
// #########################################################################################################
private Group root;
private Group grp_hexagons;
private Rectangle rect_background;
private Scene cenario;
// UI
private VBox lay_box_controls;
private Label lab_test;
private TextArea texA_test;
private Button bot_test;
// #########################################################################################################
// INÍCIO FX
// #########################################################################################################
#Override public void start(Stage stage) throws Exception
{
this.confFX();
cenario = new Scene(this.root , 640 , 480);
this.rect_background.widthProperty().bind(this.cenario.widthProperty());
this.rect_background.heightProperty().bind(this.cenario.heightProperty());
stage.setScene(cenario);
stage.setTitle("Meu programa JavaFX - R.D.S.");
stage.show();
}
protected void confFX()
{
this.root = new Group();
this.grp_hexagons = new Group();
// Initiate the circles and all animation stuff.
for(int cont = 0 ; cont < 15 ; cont++)
{
Circle circle = new Circle();
circle.setFill(Color.WHITE);
circle.setEffect(new GaussianBlur(Math.random() * 8 + 2));
circle.setOpacity(Math.random());
circle.setRadius(20);
this.grp_hexagons.getChildren().add(circle);
double randScale = (Math.random() * 4) + 1;
KeyValue kValueX = new KeyValue(circle.scaleXProperty() , randScale);
KeyValue kValueY = new KeyValue(circle.scaleYProperty() , randScale);
KeyFrame kFrame = new KeyFrame(Duration.millis(5000 + (Math.random() * 5000)) , kValueX , kValueY);
Timeline linhaT = new Timeline();
linhaT.getKeyFrames().add(kFrame);
linhaT.setAutoReverse(true);
linhaT.setCycleCount(Animation.INDEFINITE);
linhaT.play();
}
this.rect_background = new Rectangle();
this.root.getChildren().add(this.rect_background);
this.root.getChildren().add(this.grp_hexagons);
// UI
this.lay_box_controls = new VBox();
this.lay_box_controls.setSpacing(20);
this.lay_box_controls.setAlignment(Pos.CENTER);
this.bot_test = new Button("CHANGE POSITIONS");
this.bot_test.setAlignment(Pos.CENTER);
this.bot_test.setOnAction(new EventHandler<ActionEvent>()
{
#Override public void handle(ActionEvent e)
{
for(Node hexagono : grp_hexagons.getChildren())
{
hexagono.setTranslateX(Math.random() * cenario.getWidth());
hexagono.setTranslateY(Math.random() * cenario.getHeight());
}
}
});
this.texA_test = new TextArea();
this.texA_test.setText("This is just a test.");
this.lab_test = new Label("This is just a label.");
this.lab_test.setTextFill(Color.WHITE);
this.lab_test.setFont(new Font(32));
this.lay_box_controls.getChildren().add(this.lab_test);
this.lay_box_controls.getChildren().add(this.texA_test);
this.lay_box_controls.getChildren().add(this.bot_test);
this.root.getChildren().add(this.lay_box_controls);
}
}
I've tried to make the use of a StackPane as the root of my scene graph, but also found an undesired result. Despite the controls have stayed in the center of the window, the circles begin to move in as they grow and shrink, making it appear that everything is weird.
The second thing I would like to know is if it is possible to customize the controls so they perform some animation when some event happens. Although we can change the appearance of controls using CSS, it's harder to create something complex. For example, when a control changes its appearance due to a change of state, the transition state change is not made in an animated way, but in an abrupt and static way. Is there a way to animate, for example, a button between its states? This would be done using the JavaFX API? Or would that be using CSS? Or would not be possible in any way?
Thank you for your attention.
after much struggle, I and some users of the Oracle community could resolve this issue. I see no need to repeat here all the resolution made by us, so I'll post the link so you can access the solution of the problem. I hope this benefits us all. Thanks for your attention anyway.
https://community.oracle.com/thread/2620500
I can't figure out how to create a modal window in JavaFX. Basically I have file chooser and I want to ask the user a question when they select a file. I need this information in order to parse the file, so the execution needs to wait for the answer.
I've seen this question but I've not been able to find out how to implement this behavior.
In my opinion this is not good solution, because parent window is all time active.
For example if You want open window as modal after click button...
private void clickShow(ActionEvent event) {
Stage stage = new Stage();
Parent root = FXMLLoader.load(
YourClassController.class.getResource("YourClass.fxml"));
stage.setScene(new Scene(root));
stage.setTitle("My modal window");
stage.initModality(Modality.WINDOW_MODAL);
stage.initOwner(
((Node)event.getSource()).getScene().getWindow() );
stage.show();
}
Now Your new window is REALY modal - parent is block.
also You can use
Modality.APPLICATION_MODAL
Here is link to a solution I created earlier for modal dialogs in JavaFX 2.1
The solution creates a modal stage on top of the current stage and takes action on the dialog results via event handlers for the dialog controls.
JavaFX 8+
The prior linked solution uses a dated event handler approach to take action after a dialog was dismissed. That approach was valid for pre-JavaFX 2.2 implementations. For JavaFX 8+ there is no need for event handers, instead, use the new Stage showAndWait() method. For example:
Stage dialog = new Stage();
// populate dialog with controls.
...
dialog.initOwner(parentStage);
dialog.initModality(Modality.APPLICATION_MODAL);
dialog.showAndWait();
// process result of dialog operation.
...
Note that, in order for things to work as expected, it is important to initialize the owner of the Stage and to initialize the modality of the Stage to either WINDOW_MODAL or APPLICATION_MODAL.
There are some high quality standard UI dialogs in JavaFX 8 and ControlsFX, if they fit your requirements, I advise using those rather than developing your own. Those in-built JavaFX Dialog and Alert classes also have initOwner and initModality and showAndWait methods, so that you can set the modality for them as you wish (note that, by default, the in-built dialogs are application modal).
You can create application like my sample. This is only single file JavaFX application.
public class JavaFXApplication1 extends Application {
#Override
public void start(Stage primaryStage) {
Button btn = new Button();
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
Stage stage;
stage = new Stage();
final SwingNode swingNode = new SwingNode();
createSwingContent(swingNode);
StackPane pane = new StackPane();
pane.getChildren().add(swingNode);
stage.initModality(Modality.APPLICATION_MODAL);
stage.setTitle("Swing in JavaFX");
stage.setScene(new Scene(pane, 250, 150));
stage.show();
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
private void createSwingContent(final SwingNode swingNode) {
SwingUtilities.invokeLater(() -> {
try {
Path currentRelativePath = Paths.get("");
String s = currentRelativePath.toAbsolutePath().toString();
JasperDesign jasperDesign = JRXmlLoader.load(s + "/src/reports/report1.jrxml");
String query = "SELECT * FROM `accounttype`";
JRDesignQuery jrquery = new JRDesignQuery();
jrquery.setText(query);
jasperDesign.setQuery(jrquery);
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
JasperPrint JasperPrint = JasperFillManager.fillReport(jasperReport, null, c);
//JRViewer viewer = new JRViewer(JasperPrint);
swingNode.setContent(new JRViewer(JasperPrint));
} catch (JRException ex) {
Logger.getLogger(AccountTypeController.class.getName()).log(Level.SEVERE, null, ex);
}
});
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}