ScrolledComposite 的 setMinSize用法

ScrolledComposite 的 setMinSize一般设为子控件的大小，这样可以保证滚动条的范围就是子控件的范围

代码如下，

public class Scrolled {
    public static void main(String[] args) {
    	Display display = new Display();
    	Shell shell = new Shell(display);
    	shell.setLayout(new GridLayout(2,false));
    	//shell.setLayout(new FillLayout(SWT.HORIZONTAL));

    	Composite content = new Composite(shell, SWT.BORDER);
//    	content.setLayoutData(new GridData(SWT.LEFT,SWT.CENTER,false,false));
    	content.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));

    	Composite sidebar = new Composite(shell, SWT.BORDER);
    	sidebar.setLayout(new FillLayout(SWT.VERTICAL));
//    	sidebar.setLayoutData(new GridData(SWT.LEFT,SWT.CENTER,false,false));
    	sidebar.setLayoutData(new GridData(SWT.FILL,SWT.FILL,false,true));
    	Composite cc = new Composite(sidebar, SWT.BORDER);

    	ScrolledComposite sc = new ScrolledComposite(sidebar, SWT.BORDER
    			| SWT.V_SCROLL | SWT.H_SCROLL);
    	sc.setLayout(new GridLayout(1,true));

    	Composite c = new Composite(sc, SWT.NONE);
//    	c.setSize(400, 400);
    	c.setLayout(new GridLayout(1, true));

    	for(int i = 0; i < 1000; i++){
    		new Button(c, SWT.PUSH).setText("Text");
    	}

    	sc.setMinSize(c.computeSize(SWT.DEFAULT, SWT.DEFAULT));
    	sc.setContent(c);
    	sc.setExpandHorizontal(true);
    	sc.setExpandVertical(true);
    	sc.setAlwaysShowScrollBars(true);

    	shell.open();
    	while (!shell.isDisposed()) {
    		if (!display.readAndDispatch())
    			display.sleep();
    	}
    	display.dispose();
    }
}