Java Code Examples for javafx.scene.control.ScrollPane#getViewportBounds()

private static void ensureVisible(ScrollPane pane, Node node) {
    Bounds viewport = pane.getViewportBounds();
    double contentHeight = pane.getContent().getBoundsInLocal().getHeight();
    double contentWidth = pane.getContent().getBoundsInLocal().getWidth();
    double nodeMinY = node.getBoundsInParent().getMinY();
    double nodeMaxY = node.getBoundsInParent().getMaxY();
    double nodeMinX = node.getBoundsInParent().getMinX();
    double nodeMaxX = node.getBoundsInParent().getMaxX();
    double viewportMinY = (contentHeight - viewport.getHeight()) * pane.getVvalue();
    double viewportMaxY = viewportMinY + viewport.getHeight();
    double viewportMinX = (contentWidth - viewport.getWidth()) * pane.getHvalue();
    double viewportMaxX = viewportMinX + viewport.getWidth();
    if (nodeMinY < viewportMinY) {
        pane.setVvalue(nodeMinY / (contentHeight - viewport.getHeight()));
    } else if (nodeMaxY > viewportMaxY) {
        pane.setVvalue((nodeMaxY - viewport.getHeight()) / (contentHeight - viewport.getHeight()));
    }
    if (nodeMinX < viewportMinX) {
        pane.setHvalue(nodeMinX / (contentWidth - viewport.getWidth()));
    } else if (nodeMaxX > viewportMaxX) {
        pane.setHvalue((nodeMaxX - viewport.getWidth()) / (contentWidth - viewport.getWidth()));
    }

}
 

protected void ensureVisible(Node target) {
    ScrollPane scrollPane = getParentScrollPane(target);
    if (scrollPane == null) {
        return;
    }
    Node content = scrollPane.getContent();
    Bounds contentBounds = content.localToScene(content.getBoundsInLocal());
    Bounds viewportBounds = scrollPane.getViewportBounds();
    Bounds nodeBounds = target.localToScene(target.getBoundsInLocal());
    if (scrollPane.contains(nodeBounds.getMinX() - contentBounds.getMinX(), nodeBounds.getMinY() - contentBounds.getMinY())) {
        return;
    }
    double toVScroll = (nodeBounds.getMinY() - contentBounds.getMinY())
            * ((scrollPane.getVmax() - scrollPane.getVmin()) / (contentBounds.getHeight() - viewportBounds.getHeight()));
    scrollPane.setVvalue(toVScroll);
    double toHScroll = (nodeBounds.getMinX() - contentBounds.getMinX())
            * ((scrollPane.getHmax() - scrollPane.getHmin()) / (contentBounds.getWidth() - viewportBounds.getWidth()));
    scrollPane.setHvalue(toHScroll);
}
 

private void scrollTo(Node target) {
    ScrollPane scrollPane = getParentScrollPane(target);
    if (scrollPane == null)
        return;
    Node content = scrollPane.getContent();
    Bounds contentBounds = content.localToScene(content.getBoundsInLocal());
    Bounds viewportBounds = scrollPane.getViewportBounds();
    Bounds nodeBounds = target.localToScene(target.getBoundsInLocal());
    double toVScroll = (nodeBounds.getMinY() - contentBounds.getMinY())
            * ((scrollPane.getVmax() - scrollPane.getVmin()) / (contentBounds.getHeight() - viewportBounds.getHeight()));
    if (toVScroll >= scrollPane.getVmin() && toVScroll < scrollPane.getVmax())
        scrollPane.setVvalue(toVScroll);
    double toHScroll = (nodeBounds.getMinX() - contentBounds.getMinX())
            * ((scrollPane.getHmax() - scrollPane.getHmin()) / (contentBounds.getWidth() - viewportBounds.getWidth()));
    if (toHScroll >= scrollPane.getHmin() && toHScroll < scrollPane.getHmax())
        scrollPane.setHvalue(toHScroll);
}
 

public void requestBorder(){
    container.setStyle("-fx-border-color: red;");
    // Ugly ugly way to scroll to the box
    if (container.getParent().getParent().getParent().getParent() instanceof ScrollPane) {
        ScrollPane parent = (ScrollPane) container.getParent().getParent().getParent().getParent();
        Bounds b = parent.getViewportBounds();
        parent.setVvalue(container.getLayoutY() * (1 / (((VBox)container.getParent()).getHeight() - b.getHeight())));
    }
}
 

public static void setScrollPane(ScrollPane scrollPane, double xOffset,
        double yOffset) {
    final Bounds visibleBounds = scrollPane.getViewportBounds();
    double scrollWidth = scrollPane.getContent().getBoundsInParent().getWidth() - visibleBounds.getWidth();
    double scrollHeight = scrollPane.getContent().getBoundsInParent().getHeight() - visibleBounds.getHeight();

    scrollPane.setHvalue(scrollPane.getHvalue() + xOffset / scrollWidth);
    scrollPane.setVvalue(scrollPane.getVvalue() + yOffset / scrollHeight);
}
 

private ViewportProjection getViewportProjection()
{
	ScrollPane scrollPane = (ScrollPane)((BorderPane)getContent()).getCenter();
	Bounds bounds = scrollPane.getViewportBounds();
	// Because, when the scrollbars are not displayed, the Scrollpane will increase
	// the viewport size beyond the canvas size, it's necessary to max out the dimensions
	// at the size of the canvas.
	int viewportWidth = Math.min((int) bounds.getWidth(), (int) aDiagramCanvas.getWidth());
	int viewportHeight = Math.min((int) bounds.getHeight(), (int) aDiagramCanvas.getHeight());
	return new ViewportProjection(viewportWidth, viewportHeight, 
			(int) aDiagramCanvas.getWidth(), (int) aDiagramCanvas.getHeight(), 
			scrollPane.getHvalue(), scrollPane.getVvalue());
}
 

/** Get origin of a ScrollPane
 *
 *  <p>If the content is smaller than the scroll pane,
 *  the upper left corner of the scroll pane will show point (0, 0)
 *  of the content.
 *
 *  <p>As the content gets larger than the scroll pane,
 *  scroll bars allow panning and this method
 *  then determines which (x, y) of the content is displayed
 *  in the upper left corner of the scroll pane.
 *
 *  @param scroll_pane {@link ScrollPane}
 *  @return Coordinates content in upper left corner
 */
public static Point2D getContentOrigin(final ScrollPane scroll_pane)
{
    final Bounds viewport = scroll_pane.getViewportBounds();
    final Bounds content = scroll_pane.getContent().getBoundsInLocal();
    // Tried contentgetWidth() but note that content.getMinX() may be < 0.
    // Using content.getMaxX() works in all cases.
    final double x = (content.getMaxX() - viewport.getWidth()) * scroll_pane.getHvalue();
    final double y = (content.getMaxY() - viewport.getHeight()) * scroll_pane.getVvalue();
    return new Point2D(x, y);
}