java - 文本完全展开后的 SWT 水平线

Question

我正在尝试在 SWT 的文本字段中显示历史记录。

历史会生成一个新的 shell，它有两个 Composites。第一个显示标题部分，其中包含标签“历史”和下方的水平线。第二个是显示实际数据的页 footer 分。这可行，但水平线不会在整个可用水平空间(即:直到复合“结束”)扩展(即:“填充”)。

               public void mouseDown(final MouseEvent e) {
            findSegmentText.setText("");
            if(0 == lastSegmentIds.size()) return;
            if(disableToolTipsButton.getSelection()) return; // context help is not desired

            if(null != popupShell) popupShell.dispose();

            popupShell = new Shell(Display.getDefault(), SWT.BORDER | SWT.ON_TOP | SWT.MODELESS);
            //popupShell.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
            popupShell.setLayout(createNoMarginLayout(1, false));

            /* Header */
            compositeSearchSegments1 = new Composite(popupShell, SWT.NONE);
            compositeSearchSegments1.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
            compositeSearchSegments1.setLayout(createNoMarginLayout(1, false));


            /* Footer */
            compositeSearchSegments2 = new Composite(popupShell, SWT.NONE);
            compositeSearchSegments2.setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, true));
            compositeSearchSegments2.setLayout(createNoMarginLayout(2, false));

              Label history  = new Label(compositeSearchSegments1, SWT.NONE);
              history.setText("History");

              Label line1  = new Label(compositeSearchSegments1,  SWT.SEPARATOR | SWT.SHADOW_OUT | SWT.HORIZONTAL);

            for(int i = lastSegmentIds.size()-1 ; i>=0;i--) { // iterate backwards, higher indexes have newer selected links

                final String lastSegmentId  = lastSegmentIds.get(i);


                l.setText(lastSegmentId);
                Button b = new Button(compositeSearchSegments2, SWT.NONE); 

                b.setVisible(true);
                b.setText(">>");
                b.setSize(10,10);


                b.addSelectionListener(new SelectionAdapter() {
                    @Override
                    public void widgetSelected(SelectionEvent e) {
                        findSegmentText.setText(lastSegmentId);
                        searchAndDisplayLink(Long.decode(findSegmentText.getText()));
                    }
                });
            }

                   Point point = optionsComposite.toDisplay(e.x + optionsComposite.getBounds().x +findSegmentText.getLocation().x, e.y + optionsComposite.getBounds().y+findSegmentText.getLocation().y );
            popupShell.setLocation(point.x-125, point.y-10);
            popupShell.pack();
            popupShell.open();
            findSegmentText.setFocus();

        }

产生结果:

我想扩展该行以填充可用的水平空间。我应该怎么办？谢谢。

Answer 1

因为您使用的是 GridLayout，所以将 GridData 添加到分隔符 Label 就可以了:

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

    Label first = new Label(shell, SWT.NONE);
    first.setText("short");

    Label separator = new Label(shell, SWT.SEPARATOR | SWT.SHADOW_OUT | SWT.HORIZONTAL);
    separator.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

    Label second = new Label(shell, SWT.NONE);
    second.setText("looooooooooooooooooooooooooooooooooooong");

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

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

看起来像这样: