Examples with VirtualizedScrollPane org.fxmisc.flowless.VirtualizedScrollPane used on opensource projects

Example 6 with VirtualizedScrollPane

use of org.fxmisc.flowless.VirtualizedScrollPane in project RichTextFX by FXMisc.

the class PopupDemo method start.

@Override
public void start(Stage primaryStage) {
    stage = primaryStage;
    StringBuilder sb = new StringBuilder();
    for (int i = 2; i < 100; i++) {
        sb.append(String.valueOf(i)).append("        END\n");
    }
    InlineCssTextArea area = new InlineCssTextArea("Hello popup!\n" + sb.toString());
    area.setWrapText(true);
    VirtualizedScrollPane<InlineCssTextArea> vsPane = new VirtualizedScrollPane<>(area);
    BoundsPopup caretPopup = new BoundsPopup("I am the caret popup button!");
    BoundsPopup selectionPopup = new BoundsPopup("I am the selection popup button!");
    VBox caretOptions = createPopupOptions(caretPopup, "Show/Hide caret-based popup", "Show/Hide popup even when caret is out of viewport");
    VBox selectionOptions = createPopupOptions(selectionPopup, "Show/Hide selection-based popup", "Show/Hide popup even when selection is out of viewport");
    BorderPane borderPane = new BorderPane();
    borderPane.setTop(caretOptions);
    borderPane.setCenter(vsPane);
    borderPane.setBottom(selectionOptions);
    primaryStage.setScene(new Scene(borderPane, 400, 500));
    primaryStage.setTitle("Popup Demo");
    primaryStage.show();
    // ### Set up EventStreams
    // update labels depending on whether item is within viewport
    EventStream<Optional<Bounds>> caretBounds = nonNullValuesOf(area.caretBoundsProperty());
    Subscription cBoundsSub = feedVisibilityToLabelText(caretBounds, caretPopup, "Caret");
    EventStream<Optional<Bounds>> selectionBounds = nonNullValuesOf(area.selectionBoundsProperty());
    Subscription sBoundsSub = feedVisibilityToLabelText(selectionBounds, selectionPopup, "Selection");
    // set up event streams to update popups every time bounds change
    double caretXOffset = 0;
    double caretYOffset = 0;
    double selectionXOffset = 30;
    double selectionYOffset = 30;
    Subscription caretPopupSub = EventStreams.combine(caretBounds, caretPopup.outsideViewportValues()).subscribe(tuple3 -> {
        Optional<Bounds> opt = tuple3._1;
        boolean showPopupWhenCaretOutside = tuple3._2;
        if (opt.isPresent()) {
            Bounds b = opt.get();
            caretPopup.setX(b.getMaxX() + caretXOffset);
            caretPopup.setY(b.getMaxY() + caretYOffset);
            if (caretPopup.isHiddenTemporarily()) {
                caretPopup.show(stage);
                caretPopup.setHideTemporarily(false);
            }
        } else {
            if (!showPopupWhenCaretOutside) {
                caretPopup.hide();
                caretPopup.setHideTemporarily(true);
            }
        }
    });
    Subscription selectionPopupSub = EventStreams.combine(selectionBounds, selectionPopup.outsideViewportValues()).subscribe(tuple3 -> {
        Optional<Bounds> opt = tuple3._1;
        boolean showPopupWhenSelectionOutside = tuple3._2;
        if (opt.isPresent()) {
            Bounds b = opt.get();
            selectionPopup.setX(b.getMinX() + selectionXOffset + caretPopup.getWidth());
            selectionPopup.setY(b.getMinY() + selectionYOffset);
            if (selectionPopup.isHiddenTemporarily()) {
                selectionPopup.show(stage);
                selectionPopup.setHideTemporarily(false);
            }
        } else {
            if (!showPopupWhenSelectionOutside) {
                selectionPopup.hide();
                selectionPopup.setHideTemporarily(true);
            }
        }
    });
    Subscription caretSubs = caretPopupSub.and(cBoundsSub);
    Subscription selectionSubs = selectionPopupSub.and(sBoundsSub);
    caretPopup.show(primaryStage);
    selectionPopup.show(primaryStage);
    area.moveTo(0);
    area.requestFollowCaret();
}

Example 7 with VirtualizedScrollPane

use of org.fxmisc.flowless.VirtualizedScrollPane in project RichTextFX by FXMisc.

the class JavaKeywords method start.

@Override
public void start(Stage primaryStage) {
    CodeArea codeArea = new CodeArea();
    // add line numbers to the left of area
    codeArea.setParagraphGraphicFactory(LineNumberFactory.get(codeArea));
    // recompute the syntax highlighting 500 ms after user stops editing area
    Subscription cleanupWhenNoLongerNeedIt = codeArea.multiPlainChanges().successionEnds(Duration.ofMillis(500)).subscribe(ignore -> codeArea.setStyleSpans(0, computeHighlighting(codeArea.getText())));
    // when no longer need syntax highlighting and wish to clean up memory leaks
    // run: `cleanupWhenNoLongerNeedIt.unsubscribe();`
    codeArea.replaceText(0, 0, sampleCode);
    Scene scene = new Scene(new StackPane(new VirtualizedScrollPane<>(codeArea)), 600, 400);
    scene.getStylesheets().add(JavaKeywordsAsync.class.getResource("java-keywords.css").toExternalForm());
    primaryStage.setScene(scene);
    primaryStage.setTitle("Java Keywords Demo");
    primaryStage.show();
}

Example 8 with VirtualizedScrollPane

use of org.fxmisc.flowless.VirtualizedScrollPane in project RichTextFX by FXMisc.

the class JavaKeywordsAsync method start.

@Override
public void start(Stage primaryStage) {
    executor = Executors.newSingleThreadExecutor();
    codeArea = new CodeArea();
    codeArea.setParagraphGraphicFactory(LineNumberFactory.get(codeArea));
    Subscription cleanupWhenDone = codeArea.multiPlainChanges().successionEnds(Duration.ofMillis(500)).supplyTask(this::computeHighlightingAsync).awaitLatest(codeArea.multiPlainChanges()).filterMap(t -> {
        if (t.isSuccess()) {
            return Optional.of(t.get());
        } else {
            t.getFailure().printStackTrace();
            return Optional.empty();
        }
    }).subscribe(this::applyHighlighting);
    // call when no longer need it: `cleanupWhenFinished.unsubscribe();`
    codeArea.replaceText(0, 0, sampleCode);
    Scene scene = new Scene(new StackPane(new VirtualizedScrollPane<>(codeArea)), 600, 400);
    scene.getStylesheets().add(JavaKeywordsAsync.class.getResource("java-keywords.css").toExternalForm());
    primaryStage.setScene(scene);
    primaryStage.setTitle("Java Keywords Async Demo");
    primaryStage.show();
}

Example 9 with VirtualizedScrollPane

use of org.fxmisc.flowless.VirtualizedScrollPane in project RichTextFX by FXMisc.

the class SpellChecking method start.

@Override
public void start(Stage primaryStage) {
    StyleClassedTextArea textArea = new StyleClassedTextArea();
    textArea.setWrapText(true);
    Subscription cleanupWhenFinished = textArea.multiPlainChanges().successionEnds(Duration.ofMillis(500)).subscribe(change -> {
        textArea.setStyleSpans(0, computeHighlighting(textArea.getText()));
    });
    // load the dictionary
    try (InputStream input = getClass().getResourceAsStream("spellchecking.dict");
        BufferedReader br = new BufferedReader(new InputStreamReader(input))) {
        String line;
        while ((line = br.readLine()) != null) {
            dictionary.add(line);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    // load the sample document
    InputStream input2 = getClass().getResourceAsStream("spellchecking.txt");
    try (java.util.Scanner s = new java.util.Scanner(input2)) {
        String document = s.useDelimiter("\\A").hasNext() ? s.next() : "";
        textArea.replaceText(0, 0, document);
    }
    Scene scene = new Scene(new StackPane(new VirtualizedScrollPane<>(textArea)), 600, 400);
    scene.getStylesheets().add(getClass().getResource("spellchecking.css").toExternalForm());
    primaryStage.setScene(scene);
    primaryStage.setTitle("Spell Checking Demo");
    primaryStage.show();
}

Example 10 with VirtualizedScrollPane

use of org.fxmisc.flowless.VirtualizedScrollPane in project RichTextFX by FXMisc.

the class ShowLineDemo method start.

@Override
public void start(Stage primaryStage) throws Exception {
    StringBuilder sb = new StringBuilder();
    int max = 100;
    for (int i = 0; i < max; i++) {
        sb.append("Line Index: ").append(i).append("\n");
    }
    sb.append("Line Index: ").append(max);
    InlineCssTextArea area = new InlineCssTextArea(sb.toString());
    VirtualizedScrollPane<InlineCssTextArea> vsPane = new VirtualizedScrollPane<>(area);
    Function<Integer, Integer> clamp = i -> Math.max(0, Math.min(i, area.getLength() - 1));
    Button showInViewportButton = createButton("Show line somewhere in Viewport", ae -> {
        area.showParagraphInViewport(clamp.apply(field.getTextAsInt()));
    });
    Button showAtViewportTopButton = createButton("Show line at top of viewport", ae -> {
        area.showParagraphAtTop(clamp.apply(field.getTextAsInt()));
    });
    Button showAtViewportBottomButton = createButton("Show line at bottom of viewport", ae -> {
        area.showParagraphAtBottom(clamp.apply(field.getTextAsInt()));
    });
    VBox vbox = new VBox(field, showInViewportButton, showAtViewportTopButton, showAtViewportBottomButton);
    vbox.setAlignment(Pos.CENTER);
    BorderPane root = new BorderPane();
    root.setCenter(vsPane);
    root.setBottom(vbox);
    Scene scene = new Scene(root, 700, 500);
    primaryStage.setScene(scene);
    primaryStage.show();
}