i'm trying to run this simple Javafx code:
public class Javafx extends Application
{
Stage window;
Scene scene1,scene2;
public static void main(String[] args) {
launch(args);
}
public void start(Stage primaryStage) throws Exception{
window = primaryStage;
Label label1 = new Label("click here to go to scene 2");
Button button1 = new Button("click here");
button1.setOnAction(e-> window.setScene(scene2));
VBox layout1 = new VBox(15);
layout1.getChildren().addAll(label1,button1);
scene1 = new Scene(layout1,700,900);
Label label2 = new Label("get back to scene1");
Button button2 = new Button("press");
button2.setOnAction(e-> window.setScene(scene1));
StackPane layout2 = new StackPane();
label2.setRotate(70);
layout2.getChildren().addAll(label2,button2);
scene2 = new Scene(layout2,500,500);
window.setScene(scene1);
window.setTitle("Java FX");
window.show();
}
}
but for some reason after i'm closing the app and rerun it,iv'e got an error:
application luanch must not called more than once.
as far as i can tell,the launch app called only once,but the only way for me to rerun it again is to reset first the JVM .
can anyone tell me how can i overcome this?
i'm using Bluej if that's matter,
Related
I'm trying to learn javafx and I'm having some trouble with alert box interactions. My code is pretty straightforward:
public static void display(String title, String message) {
Stage window = new Stage();
window.initModality(Modality.APPLICATION_MODAL);
window.setTitle(title);
window.setMinWidth(250);
Label label = new Label();
label.setText(message);
Button closeButton = new Button("Close the window");
closeButton.setOnAction(e -> window.close());
VBox layout = new VBox(10);
layout.getChildren().addAll(label, closeButton);
layout.setAlignment(Pos.CENTER);
Scene scene = new Scene(layout);
window.setScene(scene);
window.showAndWait();
}
The problem is I can still somewhat interact with my initial window that I used to open the alert box, mainly clicking on the initial window brings it in front of the alert box. To my understanding, this shouldn't happen. Here is a gif demonstrating the issue: https://gyazo.com/0c2b69ec39f849227560fbdf2099c07c
Here is my code that calls the alert box
public void start(Stage primaryStage) {
window = primaryStage;
window.setTitle("Alert Box test");
button = new Button("Click me");
button.setOnAction(e -> AlertBox.display("New Alert", "Don't forget to close this window!"));
StackPane layout = new StackPane();
layout.getChildren().add(button);
Scene scene = new Scene(layout, 300, 250);
window.setScene(scene);
window.show();
}
What am I doing wrong here or is that just the intended behavior?
I made a very simple java application with 3 scenes and 3 buttons.
button3 (b3) opens a popup but I set the image to lock size but the window can still be changed by using the mouse on one of the corners.
is there a way to lock the size so the curson can't edit this?
Here's the simplified code (just to get and idea)
public class Handler extends Application
{
#Override
public void start(Stage primaryStage) throws Exception {
Button button1 = new Button("AD");
VBox layout1 = new VBox(button1);
layout2.setAlignment(Pos.CENTER);
Pane layout2 = new Pane();
layout3.setStyle("-fx-background-image: url(ad.jpg);" +
"-fx-background-repeat: no-repeat;" +
"-fx-background-size: initial;");
Scene scene1 = new Scene(layout1);
Scene scene2 = new Scene(layout2);
//Stage (window)
primaryStage.setTitle("Basic Handler");
primaryStage.setScene(scene1);
primaryStage.setHeight(400);
primaryStage.setWidth(400);
primaryStage.show();
button1.setOnAction(event -> {
Stage PopUp = new Stage();
PopUp.setHeight(266);
PopUp.setWidth(474);
PopUp.setTitle("Sponsored AD");
PopUp.setScene(scene2);
PopUp.showAndWait();
});
}
}
Just add this in your stage :
PopUp.setResizable(false);
I'm having trouble with the start of an JavaFX application. When loading the application the Icon in the windows taskbar is the Java icon instead of my own icon for a split second.
#Override
public final void start(final Stage stage) {
MainController controller = new MainController();
Scene scene = new Scene(controller.getRoot());
stage.setTitle("Geex");
stage.getIcons().addAll(
new Image(App.class.getResourceAsStream("/application/images/icon_16.png")),
new Image(App.class.getResourceAsStream("/application/images/icon_32.png")),
new Image(App.class.getResourceAsStream("/application/images/icon_48.png")),
new Image(App.class.getResourceAsStream("/application/images/icon_64.png")),
new Image(App.class.getResourceAsStream("/application/images/icon_128.png")),
new Image(App.class.getResourceAsStream("/application/images/icon_256.png"))
);
stage.setScene(scene);
stage.setMinHeight(FRAME_HEIGHT);
stage.setMinWidth(FRAME_WIDTH);
stage.setMaximized(true);
stage.show();
}
I am basically new to Java FX 2.
Scenario:
I have 3 Scenes and I want a way to add menu-bar such that I don't i don't want to explicitly remove the menu bar from previous scene and add it to new one. Like Some thing a Parent Scene or some way menu-bar is attached to Stage. I mean menu-bar is added just one time and always be present whatever scene is in front or not.
If This is Possible How Can I do this.
Here is the Default Example Provided by Oracle Docs of JavaFX http://docs.oracle.com/javafx/2/ui_controls/MenuSample.java.html
public class Main extends Application {
final ImageView pic = new ImageView();
final Label name = new Label();
final Label binName = new Label();
final Label description = new Label();
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage stage) {
stage.setTitle("Menu Sample");
Scene scene = new Scene(new VBox(), 400, 350);
scene.setFill(Color.OLDLACE);
MenuBar menuBar = new MenuBar();
// --- Graphical elements
final VBox vbox = new VBox();
vbox.setAlignment(Pos.CENTER);
vbox.setSpacing(10);
vbox.setPadding(new Insets(0, 10, 0, 10));
makeContentsForVBox();// in this vBox area will be fill with name pic desrciption
vbox.getChildren().addAll(name, binName, pic, description); // name is lable
// --- Menu File
Menu menuFile = new Menu("File");
MenuItem add = new MenuItem("Shuffle",
new ImageView(new Image(getClass().getResourceAsStream("new.png"))));
add.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent t) {
shuffle();
vbox.setVisible(true);
}
});
MenuItem clear = new MenuItem("Clear");
clear.setAccelerator(KeyCombination.keyCombination("Ctrl+X"));
clear.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent t) {
vbox.setVisible(false);
}
});
MenuItem exit = new MenuItem("Exit");
exit.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent t) {
System.exit(0);
}
});
menuFile.getItems().addAll(add, clear, new SeparatorMenuItem(), exit);
((VBox) scene.getRoot()).getChildren().addAll(menuBar, vbox);
stage.setScene(scene);
stage.show();
}
}
So Here menuBar is added to a scene. if i swap the scene and bring an other scene in front ... What will i do. i think I remove menuBar from this scene and add to other or simply add to new one. so every time i have to do this when i change. Is there any way to avoid this??
The approach I would prefer is to use a Scene with BorderPane as its root
scene.setRoot(borderPane);
You can add the MenuBar to the top of the BorderPane and at its Center you can place SplitPane
BorderPane borderPane = new BorderPane();
borderPane.setTop(menuBar);
borderPane.setCenter(splitPane);
Whenever you need to switch to WebView just replace it with SplitPane :
borderPane.setCenter(webView);
Following this approach, your MenuBar will always remain on TOP and you can switch between SplitPane and WebView
Since updating to JavaFX 2.0 b36 (SDK for Windows (32Bit) + Netbeans Plugin) from a previous JavaFX 2.0 version the SplitPane control does not work as expected any longer.
The divider can't be moved
The divider position is not as expected
The sizing of the contained sides is not as expected
Here my example code for a SplitPane .
public class FxTest extends Application {
public static void main(String[] args) {
Application.launch(FxTest.class, args);
}
#Override
public void start(Stage primaryStage) {
primaryStage.setTitle("SplitPane Test");
Group root = new Group();
Scene scene = new Scene(root, 200, 200, Color.WHITE);
Button button1 = new Button("Button 1");
Button button2 = new Button("Button 2");
SplitPane splitPane = new SplitPane();
splitPane.setPrefSize(200, 200);
splitPane.setOrientation(Orientation.HORIZONTAL);
splitPane.setDividerPosition(0, 0.7);
splitPane.getItems().addAll(button1, button2);
root.getChildren().add(splitPane);
primaryStage.setScene(scene);
primaryStage.setVisible(true);
}
}
As you can (hopefully) see the left side is clearly smaller than the right side.
Another funny fact is, when you change orientation to VERTICAL
splitPane.setOrientation(Orientation.VERTICAL);
and try to move the divider up or down you get some console output saying 'HERE'.
Looks like some test output.
What's the issue with this?
To get the SplitPane working as expected add a layout (e.g. BorderPane) to each side. Add the controls to display to each of these layouts. I think this should be made more clear in API documentation!
public class FxTest extends Application {
public static void main(String[] args) {
Application.launch(FxTest.class, args);
}
#Override
public void start(Stage primaryStage) {
primaryStage.setTitle("SplitPane Test");
Group root = new Group();
Scene scene = new Scene(root, 200, 200, Color.WHITE);
//CREATE THE SPLITPANE
SplitPane splitPane = new SplitPane();
splitPane.setPrefSize(200, 200);
splitPane.setOrientation(Orientation.HORIZONTAL);
splitPane.setDividerPosition(0, 0.7);
//ADD LAYOUTS AND ASSIGN CONTAINED CONTROLS
Button button1 = new Button("Button 1");
Button button2 = new Button("Button 2");
BorderPane leftPane = new BorderPane();
leftPane.getChildren().add(button1);
BorderPane rightPane = new BorderPane();
rightPane.getChildren().add(button2);
splitPane.getItems().addAll(leftPane, rightPane);
//ADD SPLITPANE TO ROOT
root.getChildren().add(splitPane);
primaryStage.setScene(scene);
primaryStage.setVisible(true);
}
}