按钮中的 SWT SWT.WRAP答案

【问题标题】：SWT SWT.WRAP in Button按钮中的 SWT SWT.WRAP
【发布时间】：2014-03-13 19:26:27
【问题描述】：

我想用 SWT.WRAP 创建一个复选框按钮。当我调整窗口大小时，文本应该相应地换行。

我创建了一个带有 2 个复选框的 sn-p：

1) 文本不换行

2) 文本会自动换行，但在调整窗口大小时不会更新

public class GridLayoutSample {
Display display = new Display();
Shell shell = new Shell(display);

private static final String lorem = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ips";

public GridLayoutSample() {

GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 1;
gridLayout.makeColumnsEqualWidth = true;
shell.setLayout(gridLayout);

Button button = new Button(shell, SWT.CHECK | SWT.WRAP);
button.setText(lorem);
button.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_FILL));

RowLayout layout = new RowLayout();
Composite row = new Composite(shell, SWT.NONE);
row.setLayout(layout);
createButton(row, lorem, SWT.CHECK | SWT.WRAP);

shell.pack();
shell.open();

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

display.dispose();
}
public void createButton(Composite parent, String text, int style) {
  RowData layoutData = new RowData();
  layoutData.height = 175;
  layoutData.width = 175;
  Button testButton = new Button(parent, style);
  testButton.setText(text);
  testButton.setLayoutData(layoutData);
}

public static void main(String[] args) {
  new GridLayoutSample();
}
}

你能帮帮我吗？

【问题讨论】：

标签： java button layout checkbox swt

【解决方案1】：

应该这样做：

Display                     display = new Display();
Shell                       shell   = new Shell(display);

private static final String lorem   = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ips";

public GridLayoutSample()
{
    shell.setLayout(new GridLayout(1, false));
    Composite row = new Composite(shell, SWT.NONE);
    row.setLayout(new GridLayout(1, false));
    row.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

    createButton(row, lorem, SWT.CHECK | SWT.WRAP);

    shell.pack();
    shell.open();

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

    display.dispose();
}

public void createButton(final Composite parent, String text, int style)
{
    final GridData layoutData = new GridData(SWT.FILL, SWT.FILL, true, true);
    layoutData.widthHint = 175;
    final Button testButton = new Button(parent, style);
    testButton.setText(text);
    testButton.setLayoutData(layoutData);

    parent.getParent().addListener(SWT.Resize, new Listener()
    {
        @Override
        public void handleEvent(Event arg0)
        {
            layoutData.widthHint = parent.computeSize(SWT.DEFAULT, SWT.DEFAULT).x;
            parent.pack();
        }
    });
}

public static void main(String[] args)
{
    new GridLayoutSample();
}

它将根据父级的大小调整Button 的大小。

这是启动后的样子：

调整大小后：

【讨论】：