ProgressBar using Threads and SceneBiulder

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ProgressBar using Threads and SceneBiulder

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#1 by (0 votes)

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I'm doing a job, and I wanted to know in a simple way how I solve this, I'm doing a simple program in it's almost a game, basically you push a button, the progress bar starts to grow, and adds 1 point to a Label. but when I put it to work, it does both at the same time and the point goes before the progress bar if it finishes, could anyone help me?

Controller method:

@FXML Label lb$;  
int dinheiro = 0;  

@FXML  
    public void botão() {  
        BarraDeProgresso b = new BarraDeProgresso(100, 90, barra);  
        new Thread(b).start();  
        dinheiro++;  
        lb$.setText(String.valueOf(dinheiro));  

    }

Class ProgressBar :

import javafx.application.Platform;  
import javafx.concurrent.Task;  
import javafx.scene.control.ProgressBar;  

public class BarraDeProgresso extends Task<Void>{

private int qt;
private int tempo;
private ProgressBar barra;


public BarraDeProgresso(int qt, int tempo, ProgressBar barra) {
    this.qt = qt;
    this.tempo = tempo;
    this.barra = barra;
    barra.setProgress(0);
}

public void inicia() {
    double incremento = 1.0/qt;
    for(int i=0; i<qt; i++){
        try {
            Thread.sleep(tempo);
            barra.setProgress(barra.getProgress()+incremento);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

//gets e sets implementados

thread javafx

asked by anonymous 09.11.2018 / 18:41

1 answer

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score 0 · Accepted Answer

The correct way to mark progress in JavaFX is by using a bind in conjunction with the methods updateProgress / updateMessage . See the example below:

Task<Void> tarefa = new Task<Void>() {

    @Override
    protected Void call() throws Exception {
        for(int i = 0; i < 10; i++) {
            updateMessage("Pontos: " + i);
            updateProgress(i, 9); // (trabalho atual, total)
            Thread.sleep(1000);
        }
        return null;
    }       
};

Label label = new Label("0");
label.textProperty().bind(tarefa.messageProperty());

ProgressBar pg = new ProgressBar();
pg.progressProperty().bind(tarefa.progressProperty());

The ProgressBar method setProgress only put the changes the value of the property but does not serve to increase.