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

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()));
    }

}
 

@Test
public void testMoveViewPort(final FxRobot robot) {
	Platform.runLater(() -> {
		try {
			app.getMainStage().showAndWait();
		}catch(final IllegalStateException ignored) {
			// Already visible
		}
	});
	WaitForAsyncUtils.waitForFxEvents();
	final ScrollPane pane = robot.lookup("#scrollPane").query();
	final double hvalue = pane.getHvalue();
	final double vvalue = pane.getVvalue();
	robot.drag("#canvas", MouseButton.MIDDLE).dropBy(100d, 200d);
	WaitForAsyncUtils.waitForFxEvents();
	assertThat(hvalue).isGreaterThan(pane.getHvalue());
	assertThat(vvalue).isGreaterThan(pane.getVvalue());
}
 

private static Point2D figureScrollOffset(Node scrollContent, ScrollPane scroller) {
	double extraWidth = scrollContent.getLayoutBounds().getWidth() - scroller.getViewportBounds().getWidth();
	double hScrollProportion = (scroller.getHvalue() - scroller.getHmin())
			/ (scroller.getHmax() - scroller.getHmin());
	double scrollXOffset = hScrollProportion * Math.max(0, extraWidth);
	double extraHeight = scrollContent.getLayoutBounds().getHeight() - scroller.getViewportBounds().getHeight();
	double vScrollProportion = (scroller.getVvalue() - scroller.getVmin())
			/ (scroller.getVmax() - scroller.getVmin());
	double scrollYOffset = vScrollProportion * Math.max(0, extraHeight);
	return new Point2D(scrollXOffset, scrollYOffset);
}
 

/** Ctrl-Wheel zoom gesture help function
 *  Store scroll offset of scrollContent (scroll_body Group) in a scroller (model_root ScrollPane) before zoom
 */
private Point2D figureScrollOffset(final Node scrollContent, final ScrollPane scroller)
{
    double extraWidth = scrollContent.getLayoutBounds().getWidth() - scroller.getViewportBounds().getWidth();
    double hScrollProportion = (scroller.getHvalue() - scroller.getHmin()) / (scroller.getHmax() - scroller.getHmin());
    double scrollXOffset = hScrollProportion * Math.max(0, extraWidth);
    double extraHeight = scrollContent.getLayoutBounds().getHeight() - scroller.getViewportBounds().getHeight();
    double vScrollProportion = (scroller.getVvalue() - scroller.getVmin()) / (scroller.getVmax() - scroller.getVmin());
    double scrollYOffset = vScrollProportion * Math.max(0, extraHeight);
    return new Point2D(scrollXOffset, scrollYOffset);
}
 

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);
}