/*
 * Java-Gnome Bindings Library
 *
 * Copyright 1998-2004 the Java-Gnome Team, all rights reserved.
 *
 * The Java-Gnome bindings library is free software distributed under
 * the terms of the GNU Library General Public License version 2.
 */

package org.gnu.gtk;

import org.gnu.glib.Handle;
import org.gnu.glib.GObject;
import org.gnu.glib.Type;

/**
 * The VScrollbar displays a vertical scrollbar with a slider and a pair of
 * arrow buttons. To create a scrollbar, you must specify the beginning and
 * ending values, the size of the slider, an initial slider position, and how
 * far the slider should move when the mouse clicks the slot.
 * 
 * @see HScrollBar
 */
public class VScrollBar extends ScrollBar {
    /**
     * Creates a new ScrollBar
     * 
     * @param adjustment
     *            The GtkAdjustment to use, or null to create a new adjustment.
     */
    public VScrollBar(Adjustment adjustment) {
        super(gtk_vscrollbar_new(adjustment == null ? null : adjustment
                .getHandle()));
    }

    /**
     * Construct a VScrollBar from a handle to a native resource.
     */
    public VScrollBar(Handle handle) {
        super(handle);
    }

    /**
     * Construct a VScrollBar from a handle to a native resource.
     */
    public static VScrollBar getVScrollBar(Handle handle) {
        if (handle == null)
            return null;

        VScrollBar obj = (VScrollBar) GObject.getGObjectFromHandle(handle);

        if (obj == null)
            obj = new VScrollBar(handle);

        return obj;
    }

    /**
     * Retrieve the runtime type used by the GLib library.
     */
    public static Type getType() {
        return new Type(gtk_vscrollbar_get_type());
    }

    native static final protected int gtk_vscrollbar_get_type();

    native static final protected Handle gtk_vscrollbar_new(Handle adjustment);
}