SWT StyledText是否有高度限制？(Does SWT StyledText have a height limit?)

 我正在尝试创建一个包含ScrolledComposite中显示的StyledText框的应用程序。 我在StyledText框中显示大量行有困难（超过2,550似乎会导致问题）。 
 
 StyledText框本身不能有滚动条，但必须可以通过ScrolledComposite滚动。 由于StyledText下方和上方还有其他需要滚动的项目，我不想要多个滚动条。 
 
 因此，对于大量数据，我有一个非常大（如高度）的StyledText框似乎在一定高度后停止。 
 
 
 问题是StyledText应该和它的内容一样高，而不是。 下面的差距的原因是包含复合材料正在调整StyledText报告的高度，但实际上它不是它的高度。 
 
 这是一段简化的示例代码来说明我的问题： 
 
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;


public class ExpandBox2
{
    public static void main(String[] args)
    {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Example");
        shell.setLayout(new FillLayout());

        ScrolledComposite scrolledComposite = new ScrolledComposite(shell, SWT.V_SCROLL);
        scrolledComposite.setLayout(new FillLayout(SWT.VERTICAL));

            Composite mainComp = new Composite(scrolledComposite, SWT.NONE);
        mainComp.setLayout(new FillLayout(SWT.VERTICAL));

        StyledText styledText = new StyledText(mainComp, SWT.NONE);
        styledText.getContent().setText(bigString());

        mainComp.setSize(mainComp.computeSize(SWT.DEFAULT, SWT.DEFAULT));

        scrolledComposite.setContent(mainComp);
        scrolledComposite.setMinSize(mainComp.computeSize(SWT.DEFAULT, SWT.DEFAULT));
        scrolledComposite.setExpandHorizontal(true);
        scrolledComposite.setExpandVertical(true);
        scrolledComposite.getVerticalBar().setIncrement(10);


        shell.setSize(400, 350);
        shell.open();
        while (!shell.isDisposed ()) {
            if (!display.readAndDispatch ()) {
                display.sleep ();
            }
        }
        display.dispose();

    }

    private static String bigString()
    {
        String big = "";

        for(int i=0;i<10000;i++)
        {
            big = big + "hello\r\n";
        }

        return big;
    }

}
 
 更新：有趣的是，SWT Label和SWT Text会出现此问题 

I am trying to create an application that contains a StyledText box displayed within a ScrolledComposite. I am having difficulties displaying a large number of lines in my StyledText box (over 2,550 seems to cause issues).
 
The StyledText box must not itself have a scroll bar but must be scrollable via the ScrolledComposite. As there are other items below and above the StyledText that need to be scrollable to and I do not want multiple scroll bars.
 
Hence with large amounts of data I have a very large (as in height) StyledText box that seems to stop after a certain height.
 
 
The issue is that the StyledText should be as tall is its contents and it is not. The reason for the gap underneath is that the containing composite is resizing what StyledText reports to be its height but this is not in fact its height.
 
Here is a piece of simplified example code to illustrate my issue:
 
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;


public class ExpandBox2
{
    public static void main(String[] args)
    {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Example");
        shell.setLayout(new FillLayout());

        ScrolledComposite scrolledComposite = new ScrolledComposite(shell, SWT.V_SCROLL);
        scrolledComposite.setLayout(new FillLayout(SWT.VERTICAL));

            Composite mainComp = new Composite(scrolledComposite, SWT.NONE);
        mainComp.setLayout(new FillLayout(SWT.VERTICAL));

        StyledText styledText = new StyledText(mainComp, SWT.NONE);
        styledText.getContent().setText(bigString());

        mainComp.setSize(mainComp.computeSize(SWT.DEFAULT, SWT.DEFAULT));

        scrolledComposite.setContent(mainComp);
        scrolledComposite.setMinSize(mainComp.computeSize(SWT.DEFAULT, SWT.DEFAULT));
        scrolledComposite.setExpandHorizontal(true);
        scrolledComposite.setExpandVertical(true);
        scrolledComposite.getVerticalBar().setIncrement(10);


        shell.setSize(400, 350);
        shell.open();
        while (!shell.isDisposed ()) {
            if (!display.readAndDispatch ()) {
                display.sleep ();
            }
        }
        display.dispose();

    }

    private static String bigString()
    {
        String big = "";

        for(int i=0;i<10000;i++)
        {
            big = big + "hello\r\n";
        }

        return big;
    }

}
 
Update: Interestingly this problem occurs with SWT Label and SWT Text 

原文：https://stackoverflow.com/questions/4510579