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Topic: 扩展SWT的button遇到的问题？

1.扩展SWT的button遇到的问题？

Posted by: funpig
Posted on: 2004-07-26 13:03

我自己扩展了swt的button，想在鼠标移动到button上时改变button的背景色，可是button却没有重绘，有人知道怎么做吗？我的代码如下：


public class ZButton extends Button{    
    private Color background = null;
    private Color foreground = null;
    private Color beginColor = null;
    private Color endColor = null;
    
    public ZButton(Composite arg0,int arg1)
    {
        super(arg0,arg1);
        if(background == null)
        {
            background = new Color(arg0.getDisplay(), 125, 125, 125);
            foreground = new Color(arg0.getDisplay(), 255, 255, 255);
            //beginColor = new Color(arg0.getDisplay(), 115,140,165);
            beginColor = new Color(arg0.getDisplay(), 255,0,0);
            endColor = new Color(arg0.getDisplay(), 185,200,210);
        }
        setBackground(beginColor);
        //setForeground(beginColor);
        
        addMouseTrackListener(new MouseTrackListener() {
            public void mouseHover(MouseEvent e) {
            }

            public void mouseExit(MouseEvent e) {
                setBackground(background);
                redraw();
                System.out.println("mouse exit button");
            }

            public void mouseEnter(MouseEvent e) {
                setForeground(beginColor);
                redraw();
                System.out.println("mouse enter button");
            }
        });
        
        addDisposeListener(new DisposeListener(){
            public void widgetDisposed(DisposeEvent arg0) {
            background.dispose();
            foreground.dispose();
            beginColor.dispose();
            endColor.dispose();
          }    
        });
    }
}

2.Re:扩展SWT的button遇到的问题？ [Re: funpig]	Copy to clipboard
Posted by: yaobifeng Posted on: 2004-07-27 17:12 调用redraw()方法刷新或者自己在paint事件里处理

3.Re:扩展SWT的button遇到的问题？ [Re: funpig]	Copy to clipboard
Posted by: funpig Posted on: 2004-07-27 17:35 我有调用啊，但是没效果 public void mouseEnter(MouseEvent e) { setForeground(beginColor); redraw(); System.out.println("mouse enter button"); }

4.Re:扩展SWT的button遇到的问题？ [Re: funpig]	Copy to clipboard
Posted by: yipsilon Posted on: 2004-08-13 12:12 SWT的Button好像不让子类继承哦....

5.Re:扩展SWT的button遇到的问题？ [Re: funpig]	Copy to clipboard
Posted by: kite Posted on: 2004-08-16 17:21 SWT中的GUI组件不能继承，如果你要这种效果，你应该用Listener或者是用一个Composite组合Button，或是自己画。