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java - 如何在 Java/SWT 中的窗口底部放置标签

问题描述

我正在使用 SWT 编写一个 Java GUI 应用程序，它显示了一个包含数百行的大表。在窗口底部，我想要一个显示一些状态信息的固定标签。

我的程序如下所示：

public class Test {

public static void main(String[] args) {
    Display display = new Display();

    Shell shell = new Shell(display, SWT.SHELL_TRIM | SWT.V_SCROLL);
    FillLayout fillLayout = new FillLayout();
    shell.setLayout(fillLayout);
    // GridLayout gridLayout = new GridLayout();
    // shell.setLayout(gridLayout);    
    final Table table = new Table(shell, SWT.NONE);
    table.setHeaderVisible(true);
    final String header[] = {"Feld 1","Feld 2","Feld 3"};
    table.setLinesVisible(true);
    for (int i = 0; i < 3; i++) {
      TableColumn column = new TableColumn(table, SWT.NONE);
      column.setText(header[i]);
      column.setWidth(100);
    }
    for (int i = 0; i < 4; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      item.setText(new String[] { "a" + i, "b" + i, "c" + i });
    }
    GridData gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL);
    gridData.verticalSpan = 3;
    table.setLayoutData(gridData);

    Label statusLine = new Label(shell, SWT.NULL);
    statusLine.setText("This shall be the status line");

    gridData = new GridData(GridData.VERTICAL_ALIGN_END);
    gridData.horizontalSpan = 3;
    statusLine.setLayoutData(gridData);
            
    shell.setSize(400,100);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }

}

如果我使用的是GridLayout，则标签位于表格下方，但根据表格大小和窗口大小，标签不可见。如果我放大窗口，标签会出现，但不会停留在窗口底部，而是始终位于表格下方。并且表格不可滚动，即我看不到我的大表格的底线。

如果我使用FillLayout，表格是可滚动的，但标签占据了我窗口的右半部分。

有什么建议，我如何将标签强制放在窗口底部并且仍然可以滚动表格？

标签： javaswt

解决方案

你GridLayout可以这样做：

GridLayout gridLayout = new GridLayout();
shell.setLayout(gridLayout);

.... your table code

// To get the table to scroll you have to give a height hint

GridData gridData = new GridData(SWT.FILL, SWT.TOP, false, false);
gridData.heightHint = 100;
table.setLayoutData(gridData);

Label statusLine = new Label(shell, SWT.NULL);
statusLine.setText("This shall be the status line");

// Set the label grid data to grab the remaining space and put the label at the bottom

gridData = new GridData(SWT.FILL, SWT.END, true, true);
statusLine.setLayoutData(gridData);

shell.setSize(400, 200);

或者让桌子抓住多余的垂直空间：

GridData gridData = new GridData(SWT.FILL, SWT.TOP, false, true);
gridData.heightHint = 100;
table.setLayoutData(gridData);

Label statusLine = new Label(shell, SWT.NULL);
statusLine.setText("This shall be the status line");

gridData = new GridData(SWT.FILL, SWT.END, true, false);
statusLine.setLayoutData(gridData);

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