separatorbar.java

来自「经典的货郎担问题解决办法」· Java 代码 · 共 150 行

//-----------------------------------------------------------------------------
//  com.coyotegulch.ui
//
//  A Package of Generic Tools for AWT-based User Interfaces
//  
//  SeparatorBar.java
//  version 3.1.0
//
//  Copyright 1996-2001 Scott Robert Ladd. All rights reserved.
// 
//  For more information about this program, contact:
//
//      Scott Robert Ladd
//      [e-mail]
//      http://www.coyotegulch.com
//
//-----------------------------------------------------------------------------
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the 
//
//      Free Software Foundation, Inc. 
//      59 Temple Place - Suite 330 
//      Boston, MA 02111-1307, USA.
//-----------------------------------------------------------------------------

package com.coyotegulch.ui;

import java.awt.*;

public class SeparatorBar
    extends Canvas
{
    // constants
    public static final int VERTICAL = 0;
    public static final int HORIZONTAL = 1;

    // fields
    private int m_orientation;

    // constructors
    public SeparatorBar()
    {
        m_orientation = VERTICAL;
    }

    public SeparatorBar
        (
        int orient
        )
    {
        if (orient == HORIZONTAL)
            m_orientation = HORIZONTAL;
        else
            m_orientation = VERTICAL;
    }

    // properties
    public int getOrientation()
    {
        return m_orientation;
    }

    // methods
    public void update
        (
        Graphics g
        )
    {
        paint(g);
    }

    public void paint
        (
        Graphics g
        )
    {
        Dimension dim = getSize();

        // fill rectangle with background color
        g.setColor(getBackground());
        g.fillRect(0,0,dim.width - 1,dim.height - 1);

        // draw lines
        Color hilite = getBackground().brighter().brighter();

        if (m_orientation == VERTICAL)
        {
            int x = dim.width / 2;

            g.setColor(hilite);
            g.drawLine(x,0,x,dim.height);

            g.setColor(getBackground().darker());
            g.drawLine(x + 1,0,x + 1,dim.height);
        }
        else // horizontal line
        {
            int y = dim.height / 2;

            g.setColor(hilite);
            g.drawLine(0,y,dim.width,y);

            g.setColor(getBackground().darker());
            g.drawLine(0,y + 1,dim.width,y + 1);
        }
    }

    public Dimension getPreferredSize()
    {
        Container parent = getParent();
        
        Dimension dim = parent.getSize();
        Insets ins = parent.getInsets();
        
        if (m_orientation == VERTICAL)
        {
            dim.width = 4;
            dim.height -= (ins.top + ins.bottom + 8);
        }
        else
        {
            dim.width -= (ins.left + ins.right + 8);
            dim.height = 4;
        }
        
        return dim;
    }

    public Dimension getMinimumSize()
    {
        return getPreferredSize();
    }

    public Dimension getMaximumSize()
    {
        return getPreferredSize();
    }
}