ScrolledCompsite 内的 SWT 表：鼠标滚轮不滚动

问题描述

以下代码摘自： How to always show vertical scroll bar in SWT table?

Table 中的

ScrolledComposite 只能通过鼠标移动垂直滚动条或将鼠标直接放在垂直滚动条上并滚动滚轮来滚动。请您建议如何通过将鼠标放在 Table 上来使表格可通过鼠标滚轮滚动？

public static void main(String[] args)
{
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setLayout(new GridLayout());

    final ScrolledComposite composite = new ScrolledComposite(shell,SWT.V_SCROLL);
    composite.setLayout(new GridLayout());
    composite.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));

    final Table table = new Table(composite,SWT.NO_SCROLL | SWT.FULL_SELECTION);
    table.setHeaderVisible(true);

    composite.setContent(table);
    composite.setExpandHorizontal(true);
    composite.setExpandVertical(true);
    composite.setAlwaysShowScrollBars(true);
    composite.setMinSize(table.computeSize(SWT.DEFAULT,SWT.DEFAULT));

    Button fillTable = new Button(shell,SWT.PUSH);
    fillTable.setText("Fill table");
    fillTable.setLayoutData(new GridData(SWT.FILL,SWT.END,false));

    fillTable.addListener(SWT.Selection,new Listener()
    {
        @Override
        public void handleEvent(Event arg0)
        {
            if (table.getColumnCount() < 1)
            {
                for (int col = 0; col < 4; col++)
                {
                    TableColumn column = new TableColumn(table,SWT.NONE);
                    column.setText("Column " + col);
                }
            }

            for (int row = 0; row < 20; row++)
            {
                TableItem item = new TableItem(table,SWT.NONE);

                for (int col = 0; col < table.getColumnCount(); col++)
                {
                    item.setText(col,"Item " + row + " " + col);
                }
            }

            for (int col = 0; col < table.getColumnCount(); col++)
            {
                table.getColumn(col).pack();
            }

            composite.setMinSize(table.computeSize(SWT.DEFAULT,SWT.DEFAULT));
        }
    });

    Button clearTable = new Button(shell,SWT.PUSH);
    clearTable.setText("Clear table");
    clearTable.setLayoutData(new GridData(SWT.FILL,false));

    clearTable.addListener(SWT.Selection,new Listener()
    {
        @Override
        public void handleEvent(Event arg0)
        {
            table.removeAll();

            composite.setMinSize(table.computeSize(SWT.DEFAULT,SWT.DEFAULT));
        }
    });

    shell.pack();
    shell.setSize(400,300);
    shell.open();
    while (!shell.isDisposed())
    {
        if (!display.readAndDispatch())
            display.sleep();
    }
    display.dispose();
}

解决方法

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