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runtime/src/main/java/io/quarkiverse/fx/style/StylesheetWatchService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package io.quarkiverse.fx.style; | ||
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|
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| import java.io.IOException; | ||
| import java.net.URL; | ||
| import java.nio.file.FileSystems; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.StandardWatchEventKinds; | ||
| import java.nio.file.WatchEvent; | ||
| import java.nio.file.WatchKey; | ||
| import java.nio.file.WatchService; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.function.Supplier; | ||
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| import javafx.application.Platform; | ||
| import javafx.collections.ObservableList; | ||
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| /** | ||
| * This utility class allows live CSS reload by watching filesystem changes | ||
| * and re-setting the stylesheet upon change. | ||
| * It is automatically used in dev mode for all {@link io.quarkiverse.fx.views.FxView} | ||
| */ | ||
| public final class StylesheetWatchService { | ||
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| private StylesheetWatchService() { | ||
| // Utility class | ||
| } | ||
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| public static void setStyleAndStartWatchingTask( | ||
| final Supplier<ObservableList<String>> stylesheetsSupplier, | ||
| final String stylesheet) throws IOException { | ||
|
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| // CSS live change monitoring | ||
| // Get stylesheet URL from disk (project root) | ||
| Path path = Path.of(stylesheet); | ||
| URL url = path.toUri().toURL(); | ||
| WatchService watchService = FileSystems.getDefault().newWatchService(); | ||
| path.getParent().register(watchService, StandardWatchEventKinds.ENTRY_MODIFY); | ||
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| ObservableList<String> stylesheets = stylesheetsSupplier.get(); | ||
| String stylesheetExternalForm = url.toExternalForm(); | ||
| updateWithStylesheet(stylesheetExternalForm, stylesheets); | ||
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| CompletableFuture.runAsync(() -> { | ||
| try { | ||
| performBlockingWatch(watchService, stylesheets, stylesheetExternalForm); | ||
| } catch (InterruptedException e) { | ||
| e.printStackTrace(); | ||
| Thread.currentThread().interrupt(); | ||
| } | ||
| }); | ||
| } | ||
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| private static void performBlockingWatch( | ||
| final WatchService watchService, | ||
| final ObservableList<String> stylesheets, | ||
| final String stylesheet) throws InterruptedException { | ||
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| WatchKey key; | ||
| while ((key = watchService.take()) != null) { | ||
| for (WatchEvent<?> event : key.pollEvents()) { | ||
| // Reload CSS in FX thread | ||
| updateWithStylesheet(stylesheet, stylesheets); | ||
| } | ||
| key.reset(); | ||
| } | ||
| } | ||
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| private static void updateWithStylesheet(final String stylesheet, final ObservableList<String> stylesheets) { | ||
| Platform.runLater(() -> stylesheets.setAll(stylesheet)); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,5 @@ | ||
| Label { | ||
| -fx-font-size: 2em; | ||
| -fx-font-weight: bold; | ||
| -fx-text-fill: blue; | ||
| } |