Example usage for javax.swing JViewport toViewCoordinates

Introduction

In this page you can find the example usage for javax.swing JViewport toViewCoordinates.

Prototype

public Point toViewCoordinates(Point p) 

Source Link

Document

Converts a point in pixel coordinates to view coordinates.

Usage

From source file:Main.java

public static boolean canVScroll(JViewport viewport) {
    JScrollPane scrollPane = (JScrollPane) viewport.getParent();
    Rectangle availR = scrollPane.getBounds();

    Component view = viewport.getView();
    Dimension viewPrefSize = view != null ? view.getPreferredSize() : new Dimension(0, 0);
    Dimension extentSize = viewport.toViewCoordinates(availR.getSize());

    boolean canVScroll = true;
    if (view instanceof Scrollable)
        canVScroll = !((Scrollable) view).getScrollableTracksViewportHeight();
    if (canVScroll && (viewPrefSize.height <= extentSize.height))
        canVScroll = false;/*from www .j a va 2s.com*/

    return canVScroll;
}

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From source file:Main.java

public static boolean canHScroll(JViewport viewport) {
    JScrollPane scrollPane = (JScrollPane) viewport.getParent();
    Rectangle availR = scrollPane.getBounds();

    Component view = viewport.getView();
    Dimension viewPrefSize = view != null ? view.getPreferredSize() : new Dimension(0, 0);
    Dimension extentSize = viewport.toViewCoordinates(availR.getSize());

    boolean canHScroll = true;
    if (view instanceof Scrollable)
        canHScroll = !((Scrollable) view).getScrollableTracksViewportWidth();
    if (canHScroll && (viewPrefSize.width <= extentSize.width))
        canHScroll = false;//from w ww.j  a v  a 2  s . c  om

    return canHScroll;
}

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