1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
| package cssregen;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.concurrent.ScheduledService;
import javafx.concurrent.Task;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.util.Duration;
public class Main extends Application {
private Path cssFile;
@Override
public void init() throws Exception {
cssFile = Files.createTempFile("temp", ".css");
assert (cssFile != null);
}
@Override
public void start(final Stage primaryStage) throws MalformedURLException {
final StackPane root = new StackPane();
final Scene scene = new Scene(root, 600, 600);
primaryStage.setScene(scene);
primaryStage.show();
startUpdateAsync(scene.getStylesheets());
}
private ScheduledService<String> cssUpdateService;
private void startUpdateAsync(final List<String> styleSheets) {
cssUpdateService = new ScheduledService<String>() {
@Override
protected Task<String> createTask() {
return new Task<String>() {
@Override
protected String call() throws Exception {
final String[] colors = {"red", "blue", "green", "pink", "cyan", "yellow", "purple", "orange"};
final int index = (int) (colors.length * Math.random());
final String color = colors[index];
try (final OutputStream out = Files.newOutputStream(cssFile);
final PrintWriter writer = new PrintWriter(out)) {
writer.println(".root {");
writer.printf(" -fx-background-color: %s;%n", color);
writer.println("}");
}
return cssFile.toUri().toURL().toExternalForm();
}
};
}
};
cssUpdateService.setDelay(Duration.seconds(2));
cssUpdateService.setPeriod(Duration.seconds(2));
cssUpdateService.setOnSucceeded(workerStateEvent -> {
Logger.getGlobal().log(Level.INFO, "Update successful");
final String css = (String) workerStateEvent.getSource().getValue();
final int index = styleSheets.indexOf(css);
if (index > -1) {
styleSheets.remove(index);
styleSheets.add(index, css);
} else {
styleSheets.add(css);
}
});
cssUpdateService.setOnFailed(workerStateEvent -> {
final Throwable ex = workerStateEvent.getSource().getException();
Logger.getGlobal().log(Level.SEVERE, ex.getMessage(), ex);
});
cssUpdateService.start();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
} |
