I need to create a progress indicator so that the user realizes that the program is performing something behind.
Briefly, I want to load images into a% grid style gallery, but when I try to load those images sometimes it may take some time for the program to appear to be embossed.
The gallery is based on this link: link
Code:
importController.FxmlSplashLoadingController;importjava.io.File;importjava.io.FileInputStream;importjava.io.FileNotFoundException;importjava.io.IOException;importjava.util.logging.Level;importjava.util.logging.Logger;importjavafx.application.Application;importjavafx.application.Platform;importjavafx.concurrent.Task;importjavafx.concurrent.WorkerStateEvent;importjavafx.event.ActionEvent;importjavafx.event.EventHandler;importjavafx.fxml.FXMLLoader;importjavafx.geometry.Insets;importjavafx.scene.Parent;importjavafx.scene.Scene;importjavafx.scene.control.Button;importjavafx.scene.control.ScrollPane;importjavafx.scene.image.Image;importjavafx.scene.image.ImageView;importjavafx.scene.input.MouseButton;importjavafx.scene.input.MouseEvent;importjavafx.scene.layout.BorderPane;importjavafx.scene.layout.StackPane;importjavafx.scene.layout.TilePane;importjavafx.scene.paint.Color;importjavafx.stage.Modality;importjavafx.stage.Screen;importjavafx.stage.Stage;importjavafx.stage.StageStyle;publicclassTestExampleextendsApplication{Stagestage;TilePanetile;@Overridepublicvoidstart(StageprimaryStage)throwsException{stage=primaryStage;ScrollPaneroot=newScrollPane();tile=newTilePane();root.setStyle("-fx-background-color: DAE6F3;");
tile.setPadding(new Insets(15, 15, 15, 15));
tile.setHgap(15);
//loading example
Stage stageLoader = createLoaderSplashBar();
//stageLoader.show();
stageLoader.setAlwaysOnTop(true);
// here runs the JavaFX thread
// Boolean as generic parameter since you want to return it
Task task = new Task<Void>() {
@Override
protected Void call() throws Exception {
Platform.runLater(new Runnable() {
@Override
public void run() {
taskLongLoadImg();
}
});
return null;
}
};
task.setOnRunning((e) -> stageLoader.show());
task.setOnSucceeded((e) -> {
stageLoader.hide();
//Boolean returnValue = task.get();
// process return value again in JavaFX thread
});
task.setOnFailed((e) -> {
// eventual error handling by catching exceptions from task.get()
});
new Thread(task).start();
root.setHbarPolicy(ScrollPane.ScrollBarPolicy.NEVER); // Horizontal
root.setVbarPolicy(ScrollPane.ScrollBarPolicy.AS_NEEDED); // Vertical scroll bar
root.setFitToWidth(true);
root.setContent(tile);
primaryStage.setWidth(Screen.getPrimary().getVisualBounds().getWidth());
primaryStage.setHeight(Screen.getPrimary().getVisualBounds()
.getHeight());
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();
}
public Stage createLoaderSplashBar() {
Stage newStage = new Stage();
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/View/FxmlSplashLoading.fxml"));
Parent root = null;
try {
root = (Parent) fxmlLoader.load();
} catch (IOException ex) {
System.out.println("Error - Loading FxmlSplashLoading.fxml");
Logger.getLogger(TestExample.class.getName()).log(Level.SEVERE, null, ex);
}
FxmlSplashLoadingController controller = fxmlLoader.<FxmlSplashLoadingController>getController();
controller.setStage(newStage);
controller.setController(controller); // guardar o proprio controller para depois poder inserir texto na label
newStage.setScene(new Scene(root));
// newStage.focusedProperty().addListener((obs, wasFocused, isNowFocused) -> {
// if (!isNowFocused) {
// System.out.println("windows closed .......");
// newStage.hide();
// }
// });
newStage.initStyle(StageStyle.UNDECORATED);
newStage.initModality(Modality.WINDOW_MODAL);
// newStage.show();
return newStage;
}
public void taskLongLoadImg(){
String path = "C:\Users\jsantos1991\Pictures\ImagesTeste";
File folder = new File(path);
File[] listOfFiles = folder.listFiles();
for (final File file : listOfFiles) {
System.out.println("file:" +file.getName());
file.setReadOnly();
ImageView imageView;
imageView = createImageView(file);
tile.getChildren().addAll(imageView);
try {
Thread.sleep(300); //
} catch (InterruptedException ex) {
Logger.getLogger(TestExample.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
private ImageView createImageView(final File imageFile) {
// DEFAULT_THUMBNAIL_WIDTH is a constant you need to define
// The last two arguments are: preserveRatio, and use smooth (slower)
// resizing
ImageView imageView = null;
try {
final Image image = new Image(new FileInputStream(imageFile), 150, 0, true,
true);
imageView = new ImageView(image);
imageView.setFitWidth(150);
imageView.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent mouseEvent) {
if(mouseEvent.getButton().equals(MouseButton.PRIMARY)){
if(mouseEvent.getClickCount() == 2){
try {
BorderPane borderPane = new BorderPane();
ImageView imageView = new ImageView();
Image image = new Image(new FileInputStream(imageFile));
imageView.setImage(image);
imageView.setStyle("-fx-background-color: BLACK");
imageView.setFitHeight(stage.getHeight() - 10);
imageView.setPreserveRatio(true);
imageView.setSmooth(true);
imageView.setCache(true);
borderPane.setCenter(imageView);
borderPane.setStyle("-fx-background-color: BLACK");
Stage newStage = new Stage();
newStage.setWidth(stage.getWidth()-400);
newStage.setHeight(stage.getHeight()-400);
newStage.setTitle(imageFile.getName());
Scene scene = new Scene(borderPane,Color.BLACK);
newStage.setScene(scene);
newStage.show();
newStage.focusedProperty().addListener((obs, wasFocused, isNowFocused) -> {
if (!isNowFocused) {
System.out.println("focus out .......");
newStage.hide();
}
});
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
}
});
} catch (FileNotFoundException ex) {
ex.printStackTrace();
}
return imageView;
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
In short, I wanted you to show an indicator of progress and that you could see TilePane adding images / to be updated from behind.
