How to use setViewportBounds (Bounds value) to the ScrollPane?

How to use setViewportBounds (Bounds value) to the ScrollPane? This method is, visually, what for? I tried to put a specific Bounds.minY to have a precise scrolling in the axis Y in vain. I use the setVvalue() method to scroll, but it is not convenient to exactly locate a position in the coordinates of the node content listed in the scroll pane.

The viewportBounds are the limits of the viewport (i.e., the visible part of the content) in the scrolling pane itself, if I understand correctly. The way to access programmatically is by setting the vValue property.

I have not tried, but if you do something like

scrollPane.setVmin(0);
DoubleBinding vmax = new DoubleBinding() {
     { super.bind(scrollPane.viewportBounds(), content.heightProperty()); }
     @Override
     public double computeValue() {
        return content.getHeight() - scrollPane.getViewportBounds().getHeight() ;
     }
};
scrollPane.vmaxProperty().bind(vmax);

to configure your component to scroll, then you can call setVvalue (...) and just pass a location of coordinates for your content node. This assumes that your content node is a region or a control; you will have to perhaps a little logic in the method computeValue() to deal with the cases where the display window is greater than the additional content.

Tags: Java

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