使用 GridLayout 居中确定和取消按钮

Question

我用一些组件构建了自己的查找对话框来配置搜索，我想使用 GridLayout 布置控件。
但我无法放置确定和取消按钮。我想将这些按钮居中，以便 window 的左边缘和确定按钮之间的边距、确定按钮和取消按钮之间的边距以及取消按钮和 [ 的右边缘之间的边距=36=]也是一样。

这是我当前的代码：

public class Main {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    GridLayout gridLayout = new GridLayout();
    gridLayout.horizontalSpacing = 0;
    gridLayout.makeColumnsEqualWidth = true;
    gridLayout.marginHeight = 10;
    gridLayout.marginWidth = 10;
    gridLayout.numColumns = 5;
    gridLayout.verticalSpacing = 10;
    shell.setLayout(gridLayout);
    shell.setText("Find");

    GridData gridData = new GridData();
    gridData.horizontalSpan = 5;
    Label label1 = new Label(shell, SWT.NONE);
    label1.setLayoutData(gridData);
    label1.setText("Please enter the find text in the field below:");

    gridData = new GridData(GridData.FILL_HORIZONTAL);
    gridData.horizontalSpan = 5;
    Text text1 = new Text(shell, SWT.BORDER | SWT.H_SCROLL | SWT.SINGLE);
    text1.setLayoutData(gridData);

    gridData = new GridData();
    gridData.horizontalSpan = 5;
    Button check1 = new Button(shell, SWT.CHECK);
    check1.setLayoutData(gridData);
    check1.setText("Match case sensitivity");

    new Label(shell, SWT.NONE);

    Button okButton = new Button(shell, SWT.PUSH);
    okButton.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
    okButton.setText("&OK");
    shell.setDefaultButton(okButton);

    new Label(shell, SWT.NONE);

    Button cancelButton = new Button(shell, SWT.PUSH);
    cancelButton.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
    cancelButton.setText("&Cancel");

    new Label(shell, SWT.NONE);

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

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

我的问题是取消按钮似乎居中，但确定按钮仍然在左侧对齐。
我想要的是一个位置，例如：左边缘，50 像素，确定按钮，50 像素，取消按钮，50 像素，右边缘。

它应该是这样的：

+++ 已编辑 +++

好的，我找到了解决办法。它并不完美，但它以令人满意的方式符合我的要求：

我现在使用两种复合材料 - 一种用于 "main" 控件，一种用于按钮。
我将一个 GridLayout 与一个 cloumn 放在 window 上，以将复合材料放在彼此之间。
按钮组合也有一个 GridLayout，但有两列用于确定和取消。然后我可以使用 GridData 对象将 window 中的按钮居中。
我唯一的问题是按钮之间的水平间距。我不得不将它设置为一个绝对值，但最好设置一个动态值（可能取决于 window 的整个宽度）。但是我还没有意识到这一点。
这是我构建的：

public class Main {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new GridLayout(1, false));
    shell.setText("Find");

    Composite mainComp = new Composite(shell, SWT.NONE);
    mainComp.setLayout(new GridLayout(1, false));
    mainComp.setLayoutData(new GridData());

    Label label1 = new Label(mainComp, SWT.NONE);
    label1.setLayoutData(new GridData());
    label1.setText("Please enter the find text in the field below:");

    Text text1 = new Text(mainComp, SWT.BORDER | SWT.H_SCROLL | SWT.SINGLE);
    text1.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

    Button check1 = new Button(mainComp, SWT.CHECK);
    check1.setLayoutData(new GridData());
    check1.setText("Match case sensitivity");

    Composite buttonComp = new Composite(shell, SWT.NONE);
    GridLayout buttonCompLayout = new GridLayout();
    buttonCompLayout.horizontalSpacing = 50;
    buttonCompLayout.numColumns = 2;
    buttonComp.setLayout(buttonCompLayout);
    buttonComp.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER));

    Button okButton = new Button(buttonComp, SWT.PUSH);
    okButton.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false));
    okButton.setText("&OK");
    shell.setDefaultButton(okButton);

    Button cancelButton = new Button(buttonComp, SWT.PUSH);
    cancelButton.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false));
    cancelButton.setText("&Cancel");

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

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

Answer 1

如果你想根据 window 的宽度设置间距，你可以听 SWT.Resize 然后更新 GridLayout#horizontalSpacing。然后，在父级上调用 layout()。

public static void main(String[] args)
{
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Whosebug");
    shell.setLayout(new GridLayout());
    shell.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

    final Composite comp = new Composite(shell, SWT.BORDER);

    final GridLayout layout = new GridLayout(2, false);
    layout.horizontalSpacing = 50;

    comp.setLayout(layout);
    comp.setLayoutData(new GridData(SWT.CENTER, SWT.TOP, true, false));

    Button first = new Button(comp, SWT.PUSH);
    first.setText("First");
    first.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));

    Button second = new Button(comp, SWT.PUSH);
    second.setText("Second");
    second.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));

    shell.addListener(SWT.Resize, new Listener()
    {
        @Override
        public void handleEvent(Event event)
        {
            int width = shell.getSize().x;
            layout.horizontalSpacing = (int) Math.round(0.1 * width);
            shell.layout(true, true);
        }
    });

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

    shell.forceFocus();

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

看起来像这样：

使用 GridLayout 居中确定和取消按钮

Center ok and cancel button with GridLayout

java

layout

swt