Question

如何使用浮点值在swt中显示比例？

这就是我现在所拥有的

    Group groupTime = new Group(shell, SWT.BORDER);
    groupTime.setLayout(new GridLayout(1,true));
    groupTime.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false,false, 1, 1));
    new Label(groupTime, SWT.NONE).setText("Speed in seconds:");

    Scale scale = new Scale (groupTime, SWT.BORDER);
    scale.setMaximum (10);

    Label speedLabel = new Label(groupTime, SWT.NONE);
    speedLabel.setText("time");
    scale.addListener(SWT.Selection, new Listener ()
    {
        public void handleEvent(Event event)
        {
            speedLabel.setText(scale.getSelection()+"");
        }
    });

由于

Answer 1

它在内部对整数有效，所以你必须自己处理浮点数。这将给你一个小数空格：

Scale scale = new Scale(shell, SWT.BORDER);
scale.setMaximum(10 * 10);

Label speedLabel = new Label(shell, SWT.NONE);
speedLabel.setText("time");
scale.addListener(SWT.Selection, new Listener()
{
    public void handleEvent(Event event)
    {
        speedLabel.setText((scale.getSelection() / 10f) + "");
    }
});

如果您需要更多小数空格，那么Scale对您来说确实不是正确的小部件。

SWT比例小部件 - 浮点值

1 个答案: