javafx.scene.control.ScrollBar源码实例Demo

类javafx.scene.control.ScrollBar源码实例Demo

下面列出了javafx.scene.control.ScrollBar 类实例代码,或者点击链接到github查看源代码,也可以在右侧发表评论。

源代码1 项目: FxDock   文件: FxTable.java
protected void fixHorizontalScrollbar()
{
	for(Node n: lookupAll(".scroll-bar"))
	{
		if(n instanceof ScrollBar)
		{
			ScrollBar b = (ScrollBar)n;
			if(b.getOrientation() == Orientation.HORIZONTAL)
			{
				if(isAutoResizeMode())
				{
					b.setManaged(false);
					b.setPrefHeight(0);
					b.setPrefWidth(0);
				}
				else
				{
					b.setManaged(true);
					b.setPrefHeight(USE_COMPUTED_SIZE);
					b.setPrefWidth(USE_COMPUTED_SIZE);
				}
			}
		}
	}
}
 
源代码2 项目: AsciidocFX   文件: FileBrowseService.java
private void initializeScrollListener() {
    threadService.runActionLater(() -> {
        this.treeView = controller.getFileSystemView();

        Set<Node> nodes = this.treeView.lookupAll(".scroll-bar");
        for (Node node : nodes) {
            ScrollBar scrollBar = (ScrollBar) node;
            if (scrollBar.getOrientation() == Orientation.VERTICAL) {
                verticalScrollState.updateState(scrollBar);
                scrollBar.valueProperty().addListener((observable, oldValue, newValue) -> {
                    verticalScrollState.updateState(scrollBar, newValue);
                });
            } else if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
                horizontalScrollState.updateState(scrollBar);
                scrollBar.valueProperty().addListener((observable, oldValue, newValue) -> {
                    horizontalScrollState.updateState(scrollBar, newValue);
                });
            }
        }
    });
}
 
源代码3 项目: AsciidocFX   文件: FileBrowseService.java
private void restoreTreeScrollState() {

        threadService.schedule(() -> { // run after some ms
            threadService.runActionLater(() -> { // run in ui thread

                Set<Node> nodes = this.treeView.lookupAll(".scroll-bar");
                for (Node node : nodes) {
                    ScrollBar scrollBar = (ScrollBar) node;
                    if (scrollBar.getOrientation() == Orientation.VERTICAL) {
                        verticalScrollState.restoreState(scrollBar);
                    } else if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
                        horizontalScrollState.restoreState(scrollBar);
                    }
                }
            });
        }, 50, TimeUnit.MILLISECONDS);
    }
 
源代码4 项目: oim-fx   文件: OnlyScrollPaneSkin.java
/**
 * Computes the size that should be reserved for horizontal scrollbar in
 * size hints (min/pref height)
 */
private double computeHsbSizeHint(ScrollPane sp) {
	return ((sp.getHbarPolicy() == ScrollBarPolicy.ALWAYS) ||
			(sp.getHbarPolicy() == ScrollBarPolicy.AS_NEEDED && (sp.getPrefViewportHeight() > 0 || sp.getMinViewportHeight() > 0)))
					? hsb.prefHeight(ScrollBar.USE_COMPUTED_SIZE)
					: 0;
}
 
源代码5 项目: oim-fx   文件: OnlyScrollPaneSkin.java
/**
 * Computes the size that should be reserved for vertical scrollbar in size
 * hints (min/pref width)
 */
private double computeVsbSizeHint(ScrollPane sp) {
	return ((sp.getVbarPolicy() == ScrollBarPolicy.ALWAYS) ||
			(sp.getVbarPolicy() == ScrollBarPolicy.AS_NEEDED && (sp.getPrefViewportWidth() > 0
					|| sp.getMinViewportWidth() > 0)))
							? vsb.prefWidth(ScrollBar.USE_COMPUTED_SIZE)
							: 0;
}
 
源代码6 项目: WorkbenchFX   文件: PrettyScrollPane.java
private void bindScrollBars() {
  final Set<Node> nodes = lookupAll("ScrollBar");
  for (Node node : nodes) {
    if (node instanceof ScrollBar) {
      ScrollBar bar = (ScrollBar) node;
      if (bar.getOrientation().equals(Orientation.VERTICAL)) {
        bindScrollBars(verticalScrollBar, bar);
      } else if (bar.getOrientation().equals(Orientation.HORIZONTAL)) {
        bindScrollBars(horizontalScrollBar, bar);
      }
    }
  }
}
 
源代码7 项目: WorkbenchFX   文件: PrettyScrollPane.java
private void bindScrollBars(ScrollBar scrollBarA, ScrollBar scrollBarB) {
  scrollBarA.valueProperty().bindBidirectional(scrollBarB.valueProperty());
  scrollBarA.minProperty().bindBidirectional(scrollBarB.minProperty());
  scrollBarA.maxProperty().bindBidirectional(scrollBarB.maxProperty());
  scrollBarA.visibleAmountProperty().bindBidirectional(scrollBarB.visibleAmountProperty());
  scrollBarA.unitIncrementProperty().bindBidirectional(scrollBarB.unitIncrementProperty());
  scrollBarA.blockIncrementProperty().bindBidirectional(scrollBarB.blockIncrementProperty());
}
 
源代码8 项目: MyBox   文件: FxmlControl.java
public static ScrollBar getVScrollBar(WebView webView) {
    try {
        Set<Node> scrolls = webView.lookupAll(".scroll-bar");
        for (Node scrollNode : scrolls) {
            if (ScrollBar.class.isInstance(scrollNode)) {
                ScrollBar scroll = (ScrollBar) scrollNode;
                if (scroll.getOrientation() == Orientation.VERTICAL) {
                    return scroll;
                }
            }
        }
    } catch (Exception e) {
    }
    return null;
}
 
源代码9 项目: marathonv5   文件: ScrollBarSample.java
private ScrollBar horizontalScrollBar(double minw, double minh, double prefw, double prefh, double maxw, double maxh) {
    final ScrollBar scrollBar = new ScrollBar();
    scrollBar.setMinSize(minw, minh);
    scrollBar.setPrefSize(prefw, prefh);
    scrollBar.setMaxSize(maxw, maxh);
    scrollBar.setVisibleAmount(50);
    scrollBar.setMax(xBarWidth-(2*circleRadius));
    return scrollBar;
}
 
源代码10 项目: marathonv5   文件: ScrollBarSample.java
private ScrollBar verticalScrollBar(double minw, double minh, double prefw, double prefh, double maxw, double maxh) {
    final ScrollBar scrollBar = new ScrollBar();
    scrollBar.setMinSize(minw, minh);
    scrollBar.setPrefSize(prefw, prefh);
    scrollBar.setMaxSize(maxw, maxh);
    scrollBar.setVisibleAmount(50);
    scrollBar.setMax(yBarHeight-(2*circleRadius));
    return scrollBar;
}
 
源代码11 项目: marathonv5   文件: ScrollBarSample.java
private ScrollBar horizontalScrollBar(double minw, double minh, double prefw, double prefh, double maxw, double maxh) {
    final ScrollBar scrollBar = new ScrollBar();
    scrollBar.setMinSize(minw, minh);
    scrollBar.setPrefSize(prefw, prefh);
    scrollBar.setMaxSize(maxw, maxh);
    scrollBar.setVisibleAmount(50);
    scrollBar.setMax(xBarWidth-(2*circleRadius));
    return scrollBar;
}
 
源代码12 项目: marathonv5   文件: ScrollBarSample.java
private ScrollBar verticalScrollBar(double minw, double minh, double prefw, double prefh, double maxw, double maxh) {
    final ScrollBar scrollBar = new ScrollBar();
    scrollBar.setMinSize(minw, minh);
    scrollBar.setPrefSize(prefw, prefh);
    scrollBar.setMaxSize(maxw, maxh);
    scrollBar.setVisibleAmount(50);
    scrollBar.setMax(yBarHeight-(2*circleRadius));
    return scrollBar;
}
 
源代码13 项目: chvote-1-0   文件: KeyTestingController.java
private void bindScrollBars() {
    ScrollBar plainTextScrollBar = plainTextList.lookupAll(".scroll-bar").stream().map(e -> (ScrollBar) e).filter(e -> e.getOrientation().equals(Orientation.HORIZONTAL)).findFirst().orElse(null);
    ScrollBar decryptedTextScrollBar = decryptedTextList.lookupAll(".scroll-bar").stream().map(e -> (ScrollBar) e).filter(e -> e.getOrientation().equals(Orientation.HORIZONTAL)).findFirst().orElse(null);

    if (plainTextScrollBar != null && decryptedTextScrollBar != null) {
        plainTextScrollBar.valueProperty().bindBidirectional(decryptedTextScrollBar.valueProperty());
    } else {
        LOGGER.error("couldn't find scrollbars");
    }
}
 
源代码14 项目: megan-ce   文件: FXUtilities.java
/**
 * bidirectionally bind scroll bars of two nodes
 *
 * @param node1
 * @param node2
 * @param orientation
 */
public static void bidirectionallyBindScrollBars(final Node node1, final Node node2, Orientation orientation) {
    final ScrollBar scrollBar1 = findScrollBar(node1, orientation);
    final ScrollBar scrollBar2 = findScrollBar(node2, orientation);

    if (scrollBar1 != null && scrollBar2 != null) {
        final Single<Boolean> inChange = new Single<>(false);
        scrollBar1.valueProperty().addListener(observable -> {
            if (!inChange.get()) {
                try {
                    inChange.set(true);
                    scrollBar2.setValue(scrollBar1.getValue() * (scrollBar2.getMax() - scrollBar2.getMin()) / (scrollBar1.getMax() - scrollBar1.getMin()));
                } finally {
                    inChange.set(false);
                }
            }
        });
        scrollBar2.valueProperty().addListener(observable -> {
            if (!inChange.get()) {
                try {
                    inChange.set(true);
                    scrollBar1.setValue(scrollBar2.getValue() * (scrollBar1.getMax() - scrollBar1.getMin()) / (scrollBar2.getMax() - scrollBar2.getMin()));
                } finally {
                    inChange.set(false);
                }
            }
        });
    }
}
 
源代码15 项目: megan-ce   文件: FXUtilities.java
/**
 * Find the scrollbar of the given table.
 *
 * @param node
 * @return
 */
public static ScrollBar findScrollBar(Node node, Orientation orientation) {
    Set<Node> below = node.lookupAll(".scroll-bar");
    for (final Node nodeBelow : below) {
        if (nodeBelow instanceof ScrollBar) {
            ScrollBar sb = (ScrollBar) nodeBelow;
            if (sb.getOrientation() == orientation) {
                return sb;
            }
        }
    }
    return null;
}
 
源代码16 项目: FxDock   文件: FxTreeTable.java
protected void fixHorizontalScrollbar()
{
	Skin skin = tree.getSkin();
	if(skin == null)
	{
		return;
	}
	
	for(Node n: skin.getNode().lookupAll(".scroll-bar"))
	{
		if(n instanceof ScrollBar)
		{
			ScrollBar b = (ScrollBar)n;
			if(b.getOrientation() == Orientation.HORIZONTAL)
			{
				if(isAutoResizeMode())
				{
					b.setManaged(false);
					b.setPrefHeight(0);
					b.setPrefWidth(0);
				}
				else
				{
					b.setManaged(true);
					b.setPrefHeight(USE_COMPUTED_SIZE);
					b.setPrefWidth(USE_COMPUTED_SIZE);
				}
			}
		}
	}
}
 
源代码17 项目: mars-sim   文件: ScenarioConfigEditorFX.java
private ScrollBar getVerticalScrollbar(TableView<?> table) {
	ScrollBar result = null;
	for (Node n : table.lookupAll(".scroll-bar")) {
		if (n instanceof ScrollBar) {
			ScrollBar bar = (ScrollBar) n;
			if (bar.getOrientation().equals(Orientation.VERTICAL)) {
				result = bar;
			}
		}
	}
	return result;
}
 
源代码18 项目: mars-sim   文件: ScenarioConfigEditorFX.java
void scrolled(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
	double value = newValue.doubleValue();
	// System.out.println("Scrolled to " + value);
	ScrollBar bar = getVerticalScrollbar(tableView);
	if (value == bar.getMax()) {
		// System.out.println("Adding new persons.");
		// double targetValue = value * items.size();
		// addPersons();
		// bar.setValue(targetValue / items.size());
	}
}
 
源代码19 项目: tuxguitar   文件: JFXListBoxSelect.java
public Float getScrollWidth() {
	if( this.scrollWidth == null ) {
		ScrollBar scrollBar = new ScrollBar();
		scrollBar.setManaged(false);
		scrollBar.applyCss();
		
		this.scrollWidth = Double.valueOf(scrollBar.getWidth()).floatValue();
	}
	return this.scrollWidth;
}
 
源代码20 项目: markdown-writer-fx   文件: Utils.java
private static ScrollBar findScrollBar(Node node, Orientation orientation) {
	Set<Node> scrollBars = node.lookupAll(".scroll-bar");
	for (Node scrollBar : scrollBars) {
		if (scrollBar instanceof ScrollBar &&
			((ScrollBar)scrollBar).getOrientation() == orientation)
		  return (ScrollBar) scrollBar;
	}
	return null;
}
 
源代码21 项目: Intro-to-Java-Programming   文件: Exercise_20_09.java
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {
	MultipleBallPane ballPane = new MultipleBallPane();
	ballPane.setStyle("-fx-border-color: yellow");

	Button btAdd = new Button("+");
	Button btSubtract = new Button("-");
	HBox hBox = new HBox(10);
	hBox.getChildren().addAll(btAdd, btSubtract);
	hBox.setAlignment(Pos.CENTER);

	// Add or remove a ball
	btAdd.setOnAction(e -> ballPane.add());
	btSubtract.setOnAction(e -> ballPane.subtract());

	// Pause and resume animation
	ballPane.setOnMousePressed(e -> ballPane.pause());
	ballPane.setOnMouseReleased(e -> ballPane.play());

	// Use a scroll bar to control animation speed
	ScrollBar sbSpeed = new ScrollBar();
	sbSpeed.setMax(20);
	sbSpeed.setValue(10);
	ballPane.rateProperty().bind(sbSpeed.valueProperty());

	BorderPane pane = new BorderPane();
	pane.setCenter(ballPane);
	pane.setTop(sbSpeed);
	pane.setBottom(hBox);

	// Create a scene and place the in the stage
	Scene scene = new Scene(pane, 250, 150);
	primaryStage.setTitle("Exercise_20_09"); // Set the stage title
	primaryStage.setScene(scene); // Place the scene in the stage
	primaryStage.show(); // Display the stage
}
 
源代码22 项目: bisq   文件: GUIUtil.java
public static double getScrollbarWidth(Node scrollablePane) {
    Node node = scrollablePane.lookup(".scroll-bar");
    if (node instanceof ScrollBar) {
        final ScrollBar bar = (ScrollBar) node;
        if (bar.getOrientation().equals(Orientation.VERTICAL))
            return bar.getWidth();
    }
    return 0;
}
 
源代码23 项目: HubTurbo   文件: PanelMenuCreator.java
public MenuItem createRightPanelMenuItem() {
    MenuItem createRight = new MenuItem("Create");
    createRight.setOnAction(e -> {
        logger.info("Menu: Panels > Create");
        panelControl.createNewPanelAtEnd();
        // listener is used as panelsScroll's Hmax property doesn't update
        // synchronously
        ChangeListener<Number> listener = new ChangeListener<Number>() {
            @Override
            public void changed(ObservableValue<? extends Number> arg0, Number arg1, Number arg2) {
                for (Node child : panelsScrollPane.getChildrenUnmodifiable()) {
                    if (child instanceof ScrollBar) {
                        ScrollBar scrollBar = (ScrollBar) child;
                        if (scrollBar.getOrientation() == Orientation.HORIZONTAL
                                && scrollBar.visibleProperty().get()) {
                            panelControl.scrollToCurrentlySelectedPanel();
                            break;
                        }
                    }
                }
                panelControl.widthProperty().removeListener(this);
            }
        };
        panelControl.widthProperty().addListener(listener);
    });
    createRight.setAccelerator(CREATE_RIGHT_PANEL);
    return createRight;
}
 
源代码24 项目: Flowless   文件: VirtualizedScrollPane.java
private static void setupUnitIncrement(ScrollBar bar) {
    bar.unitIncrementProperty().bind(new DoubleBinding() {
        { bind(bar.maxProperty(), bar.visibleAmountProperty()); }

        @Override
        protected double computeValue() {
            double max = bar.getMax();
            double visible = bar.getVisibleAmount();
            return max > visible
                    ? 16 / (max - visible) * max
                    : 0;
        }
    });
}
 
源代码25 项目: AsciidocFX   文件: ScrollState.java
public void updateState(ScrollBar scrollBar, Number newValue) {
    if (Objects.nonNull(newValue)) {
        double value = newValue.doubleValue();
        if (value > 0) {
            updateState(scrollBar);
            this.setValue(value);
        }
    }
}
 
源代码26 项目: AsciidocFX   文件: ScrollState.java
public void restoreState(ScrollBar scrollBar) {
    if (value > 0) {
        updateState(scrollBar);
        scrollBar.setMin(getMin());
        scrollBar.setMax(getMax());
        scrollBar.setUnitIncrement(getUnitIncrement());
        scrollBar.setBlockIncrement(getBlockIncrement());
        scrollBar.setValue(value);
    }
}
 
源代码27 项目: constellation   文件: RunPane.java
public void handleAttributeMoved(double sceneX, double sceneY) {
    if (draggingAttributeNode != null) {
        final Point2D location = sceneToLocal(sceneX, sceneY);

        double x = location.getX() - draggingOffset.getX();
        if (x < 0) {
            x = 0;
        }
        if (x > RunPane.this.getWidth() - draggingAttributeNode.getWidth()) {
            x = RunPane.this.getWidth() - draggingAttributeNode.getWidth();
        }

        double y = location.getY() - draggingOffset.getY();
        if (y < 0) {
            y = 0;
        }
        if (y > RunPane.this.getHeight() - draggingAttributeNode.getHeight()) {
            y = RunPane.this.getHeight() - draggingAttributeNode.getHeight();
        }

        draggingAttributeNode.setLayoutX(x);
        draggingAttributeNode.setLayoutY(y);

        final Point2D tableLocation = sampleDataView.sceneToLocal(sceneX, sceneY);

        double offset = 0;
        Set<Node> nodes = sampleDataView.lookupAll(".scroll-bar");
        for (final Node node : nodes) {
            if (node instanceof ScrollBar) {
                final ScrollBar scrollBar = (ScrollBar) node;
                if (scrollBar.getOrientation() == Orientation.HORIZONTAL) {
                    offset = scrollBar.getValue();
                    break;
                }
            }
        }

        double totalWidth = 0;
        mouseOverColumn = null;

        final double cellPadding = 0.5; // ?
        if (tableLocation.getX() >= 0 && tableLocation.getX() <= sampleDataView.getWidth() && tableLocation.getY() >= 0 && tableLocation.getY() <= sampleDataView.getHeight()) {
            double columnLocation = tableLocation.getX() + offset;
            for (TableColumn<TableRow, ?> column : sampleDataView.getColumns()) {
                totalWidth += column.getWidth() + cellPadding;
                if (columnLocation < totalWidth) {
                    mouseOverColumn = (ImportTableColumn) column;
                    break;
                }
            }
        }

        if (mouseOverColumn != null) {
            // Allow for the SplitPane left side inset+padding (1+1 hard-coded).
            final double edge = 2;

            columnRectangle.setLayoutX(edge + sampleDataView.getLayoutX() + totalWidth - mouseOverColumn.getWidth() - offset);
            columnRectangle.setLayoutY(sampleDataView.getLayoutY());
            columnRectangle.setWidth(mouseOverColumn.getWidth());
            columnRectangle.setHeight(sampleDataView.getHeight());
            columnRectangle.setVisible(true);
        } else {
            columnRectangle.setVisible(false);
        }
    }
}
 
源代码28 项目: phoebus   文件: ScrollBarRepresentation.java
@Override
protected ScrollBar createJFXNode() throws Exception
{
    final ScrollBar scrollbar = new ScrollBar();
    scrollbar.setOrientation(model_widget.propHorizontal().getValue() ? Orientation.VERTICAL : Orientation.HORIZONTAL);
    scrollbar.setFocusTraversable(true);
    scrollbar.setOnKeyPressed((final KeyEvent event) ->
    {
        switch (event.getCode())
        {
        case DOWN: jfx_node.decrement();
            break;
        case UP: jfx_node.increment();
            break;
        case PAGE_UP:
            //In theory, this may be unsafe; i.e. if max/min are changed
            //after node creation.
            jfx_node.adjustValue(max);
            break;
        case PAGE_DOWN:
            jfx_node.adjustValue(min);
            break;
        default: break;
        }
    });
    if (! toolkit.isEditMode())
    {
        scrollbar.addEventFilter(MouseEvent.ANY, e ->
        {
            if (e.getButton() == MouseButton.SECONDARY)
            {
                // Disable the contemporary triggering of a value change and of the
                // opening of contextual menu when right-clicking on the scrollbar's
                // buttons.
                e.consume();
            }
            else if (MouseEvent.MOUSE_PRESSED.equals(e.getEventType()))
            {
                // Prevent UI value update while actively changing
                isValueChanging = true;
            }
            else if (MouseEvent.MOUSE_RELEASED.equals(e.getEventType()))
            {
                // Prevent UI value update while actively changing
                isValueChanging = false;
            }
        });
    }
    enablementChanged(null, null, null);
    limitsChanged(null, null, null);

    // This code manages layout,
    // because otherwise for example border changes would trigger
    // expensive Node.notifyParentOfBoundsChange() recursing up the scene graph
    scrollbar.setManaged(false);

    return scrollbar;
}
 
源代码29 项目: tilesfx   文件: CustomScrollableTileSkin.java
@Override protected void resize() {
    super.resize();
    width  = tile.getWidth() - tile.getInsets().getLeft() - tile.getInsets().getRight();
    height = tile.getHeight() - tile.getInsets().getTop() - tile.getInsets().getBottom();
    size   = width < height ? width : height;

    double containerWidth  = contentBounds.getWidth();
    double containerHeight = contentBounds.getHeight();
    if (null == verticalScrollBar) {
        for (Node n : graphicContainer.lookupAll(".scroll-bar")) {
            if (n instanceof ScrollBar) {
                ScrollBar bar = (ScrollBar) n;
                if (bar.getOrientation().equals(Orientation.VERTICAL)) {
                    verticalScrollBar = bar;
                    verticalScrollBar.visibleProperty().addListener((o, ov, nv) -> {
                        if (nv) {
                            scrollBarWidth = verticalScrollBar.getLayoutBounds().getWidth();
                        }
                    });
                    break;
                }
            }
        }
    } else {
        if (verticalScrollBar.isVisible()) {
            contentBounds.setWidth(contentBounds.getWidth() - scrollBarWidth);
        } else {
            contentBounds.setWidth(contentBounds.getWidth() + scrollBarWidth);
        }
    }

    if (tile.isShowing() && width > 0 && height > 0) {
        pane.setMaxSize(width, height);
        pane.setPrefSize(width, height);

        if (containerWidth > 0 && containerHeight > 0) {
            graphicContainer.setMinSize(containerWidth, containerHeight);
            graphicContainer.setMaxSize(containerWidth, containerHeight);
            graphicContainer.setPrefSize(containerWidth, containerHeight);
            graphicContainer.relocate(contentBounds.getX(), contentBounds.getY());

            if (null != tile) {
                Node graphic = tile.getGraphic();
                if (tile.getGraphic() instanceof Shape) {
                    double graphicWidth  = graphic.getBoundsInLocal().getWidth();
                    double graphicHeight = graphic.getBoundsInLocal().getHeight();

                    if (graphicWidth > containerWidth || graphicHeight > containerHeight) {
                        double scale = 1;

                        if (graphicWidth - containerWidth > graphicHeight - containerHeight) {
                            scale = containerWidth / graphicWidth;
                        } else {
                            scale = containerHeight / graphicHeight;
                        }

                        graphic.setScaleX(scale);
                        graphic.setScaleY(scale);
                    }
                } else if (tile.getGraphic() instanceof ImageView) {
                    ImageView imgView = (ImageView) graphic;
                    imgView.setPreserveRatio(true);
                    imgView.setFitWidth(containerWidth);
                    imgView.setFitHeight(containerHeight);
                    //((ImageView) graphic).setFitWidth(containerWidth);
                    //((ImageView) graphic).setFitHeight(containerHeight);
                }
            }
        }
        resizeStaticText();
    }
}
 
源代码30 项目: megan-ce   文件: TableItemTask.java
private ListChangeListener<IMatchBlock> createChangeListener(final TableItem tableItem, final LongProperty previousSelectionTime) {
    final ReadLayoutPane pane = tableItem.getPane();
    return c -> {
        if (c.next()) {

            if (!pane.getMatchSelection().isEmpty())
                tableView.getSelectionModel().select(tableItem);
        }
        if (System.currentTimeMillis() - 200 > previousSelectionTime.get()) { // only if sufficient time has passed since last scroll...
            try {
                final double focusCoordinate;
                int focusIndex = pane.getMatchSelection().getFocusIndex();
                if (focusIndex >= 0 && pane.getMatchSelection().getItems()[focusIndex] != null) {
                    final IMatchBlock focusMatch = pane.getMatchSelection().getItems()[focusIndex];
                    focusCoordinate = 0.5 * (focusMatch.getAlignedQueryStart() + focusMatch.getAlignedQueryEnd());
                    double leadingWidth = 0;
                    double lastWidth = 0;
                    double totalWidth = 0;
                    {
                        int numberOfColumns = tableView.getColumns().size();
                        int columns = 0;
                        for (TableColumn col : tableView.getColumns()) {
                            if (col.isVisible()) {
                                if (columns < numberOfColumns - 1)
                                    leadingWidth += col.getWidth();
                                else
                                    lastWidth = col.getWidth();
                                totalWidth += col.getWidth();
                            }
                            columns++;
                        }
                    }

                    final double coordinateToShow = leadingWidth + lastWidth * (focusCoordinate / maxReadLength.get());
                    final ScrollBar hScrollBar = FXUtilities.findScrollBar(tableView, Orientation.HORIZONTAL);

                    if (hScrollBar != null) { // should never be null, but best to check...
                        final double newPos = (hScrollBar.getMax() - hScrollBar.getMin()) * ((coordinateToShow) / totalWidth);

                        Platform.runLater(() -> {
                            tableView.scrollTo(tableItem);
                            hScrollBar.setValue(newPos);
                        });
                    }
                }
            } catch (Exception ignored) {
            }
        }
        previousSelectionTime.set(System.currentTimeMillis());
    };
}
 
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