Michael Bayne
53c3435854
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3335 542714f4-19e9-0310-aa3c-eee0fc999fb1
106 lines
3.4 KiB
Java
106 lines
3.4 KiB
Java
//
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// $Id$
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.media;
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import java.awt.Rectangle;
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import javax.swing.BoundedRangeModel;
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import javax.swing.DefaultBoundedRangeModel;
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import javax.swing.event.ChangeEvent;
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import javax.swing.event.ChangeListener;
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import com.threerings.media.util.MathUtil;
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/**
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* Provides a {@link BoundedRangeModel} interface to a virtual media panel
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* so that it can easily be wired up to scroll bars or other scrolling
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* controls.
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*/
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public class VirtualRangeModel
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implements ChangeListener
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{
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/**
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* Creates a virtual media panel range model that will interact with
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* the supplied virtual media panel.
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*/
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public VirtualRangeModel (VirtualMediaPanel panel)
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{
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_panel = panel;
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// listen to our range models and scroll our badself
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_hrange.addChangeListener(this);
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_vrange.addChangeListener(this);
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}
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/**
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* Informs the virtual range model the extent of the area over which
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* we can scroll.
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*/
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public void setScrollableArea (int x, int y, int width, int height)
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{
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Rectangle vb = _panel.getViewBounds();
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int hmax = x + width, vmax = y + height, value;
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if (width > vb.width) {
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value = MathUtil.bound(x, _hrange.getValue(), hmax - vb.width);
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_hrange.setRangeProperties(value, vb.width, x, hmax, false);
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} else {
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_hrange.setRangeProperties(0, vb.width, 0, vb.width, false);
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}
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if (height > vb.height) {
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value = MathUtil.bound(y, _vrange.getValue(), vmax - vb.height);
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_vrange.setRangeProperties(value, vb.height, y, vmax, false);
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} else {
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_vrange.setRangeProperties(0, vb.height, 0, vb.height, false);
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}
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}
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/**
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* Returns a range model that controls the scrollability of the scene
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* in the horizontal direction.
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*/
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public BoundedRangeModel getHorizModel ()
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{
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return _hrange;
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}
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/**
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* Returns a range model that controls the scrollability of the scene
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* in the vertical direction.
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*/
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public BoundedRangeModel getVertModel ()
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{
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return _vrange;
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}
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// documentation inherited from interface ChangeListener
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public void stateChanged (ChangeEvent e)
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{
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_panel.setViewLocation(_hrange.getValue(), _vrange.getValue());
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}
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protected VirtualMediaPanel _panel;
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protected BoundedRangeModel _hrange = new DefaultBoundedRangeModel();
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protected BoundedRangeModel _vrange = new DefaultBoundedRangeModel();
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}
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