我在SWT的TabFolder下创建了两个扩展栏。然后，将选项卡标签的布局设置为FillLayout（SWT.HORIZONTAL）。它在标签文件夹中显示了两个展开条。
但是，当我将Tab文件夹更改为具有相同布局的CTabFolder时，它没有显示我
CTabFolder下的所有扩展条。可能是什么问题？我需要为此设置任何参数吗？请查看我下面的TabFolder和CTabFolder代码。
TabFolder的代码：
public class Snippet223 {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
shell.setText("ExpandBar Example");
final TabFolder folder = new TabFolder(shell, SWT.BORDER);
folder.setLayout(new FillLayout(SWT.HORIZONTAL));
ExpandBar bar = new ExpandBar(folder, SWT.V_SCROLL);
ExpandBar bar1 = new ExpandBar(folder, SWT.V_SCROLL);
Image image = display.getSystemImage(SWT.ICON_QUESTION);
// First item
createContentsForExpandableBar(bar, image);
createContentsForExpandableBar(bar1, image);
shell.setSize(400, 350);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
private static void createContentsForExpandableBar(ExpandBar bar,
Image image) {
Composite composite = new Composite(bar, SWT.NONE);
GridLayout layout = new GridLayout();
layout.marginLeft = layout.marginTop = layout.marginRight = layout.marginBottom = 10;
layout.verticalSpacing = 10;
composite.setLayout(layout);
Button button = new Button(composite, SWT.PUSH);
button.setText("SWT.PUSH");
button = new Button(composite, SWT.RADIO);
button.setText("SWT.RADIO");
button = new Button(composite, SWT.CHECK);
button.setText("SWT.CHECK");
button = new Button(composite, SWT.TOGGLE);
button.setText("SWT.TOGGLE");
ExpandItem item0 = new ExpandItem(bar, SWT.NONE, 0);
item0.setText("What is your favorite button");
item0.setHeight(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT).y);
item0.setControl(composite);
item0.setImage(image);
}
}
CTabFolder的代码：
public class Snippet223 {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
shell.setText("ExpandBar Example");
final CTabFolder folder = new CTabFolder(shell, SWT.BORDER);
folder.setLayout(new FillLayout(SWT.HORIZONTAL));
ExpandBar bar = new ExpandBar(folder, SWT.V_SCROLL);
ExpandBar bar1 = new ExpandBar(folder, SWT.V_SCROLL);
Image image = display.getSystemImage(SWT.ICON_QUESTION);
// First item
createContentsForExpandableBar(bar, image);
createContentsForExpandableBar(bar1, image);
shell.setSize(400, 350);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
private static void createContentsForExpandableBar(ExpandBar bar,
Image image) {
Composite composite = new Composite(bar, SWT.NONE);
GridLayout layout = new GridLayout();
layout.marginLeft = layout.marginTop = layout.marginRight = layout.marginBottom = 10;
layout.verticalSpacing = 10;
composite.setLayout(layout);
Button button = new Button(composite, SWT.PUSH);
button.setText("SWT.PUSH");
button = new Button(composite, SWT.RADIO);
button.setText("SWT.RADIO");
button = new Button(composite, SWT.CHECK);
button.setText("SWT.CHECK");
button = new Button(composite, SWT.TOGGLE);
button.setText("SWT.TOGGLE");
ExpandItem item0 = new ExpandItem(bar, SWT.NONE, 0);
item0.setText("What is your favorite button");
item0.setHeight(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT).y);
item0.setControl(composite);
item0.setImage(image);
}
}
最佳答案
您需要在TabFolder / CTabFolder下创建一个TabItem / CTabItem并将内容添加到其中。您不应该在tab文件夹本身上设置布局。从JavaDoc for CTabFolder：
请注意，尽管此类是Composite的子类，
在其上设置布局没有任何意义。