[英]ScrolledComposite vertical scrollbar not appearing
我正在尝试创建一个容器,在要获得滚动条的一定数量的按钮之后,该容器中将包含一个按钮,但是现在滚动条没有出现任何建议?
编辑
MoBuConLTLUI类
public class MoBuConLTLUI extends Composite {
public MoBuConLTLUI(Composite parent) {
super(parent, SWT.NONE);
this.setLayout(new GridLayout());
createScrollableComposite(parent);
}
public void createScrollableComposite (Composite parent) {
// set the size of the scrolled content - method 1
final ScrolledComposite sc1 = new ScrolledComposite(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
final Composite c1 = new Composite(sc1, SWT.V_SCROLL);
sc1.setContent(c1);
sc1.setMinSize(c1.computeSize(SWT.DEFAULT, SWT.DEFAULT));
GridLayout layout = new GridLayout();
layout.numColumns = 1;
c1.setLayout(layout);
Button b1 = new Button (c1, SWT.PUSH);
b1.setText("first button");
c1.setSize(200,200);
Button add = new Button (parent, SWT.PUSH);
add.setText("add children");
final int[] index = new int[]{0};
add.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event e) {
index[0]++;
Button button = new Button(c1, SWT.PUSH);
button.setText("button "+index[0]);
// reset size of content so children can be seen - method 1
c1.layout();
}
});
}
}
编辑父级初始化如下
public class TestBundleUI extends AbstractEntryPoint{
private static final long serialVersionUID = -7954149221017272321L;
private Composite testUiParentComposite;
@Override
public void createContents(Composite parent) {
this.testUiParentComposite = parent;
testUiParentComposite.setLayout(new GridLayout());
new MoBuConLTLUI(parent);
}
}
最主要的是您缺少一个
c1.setSize(c1.computeSize(SWT.DEFAULT, SWT.DEFAULT));
在选择监听器中。
您还应该使用SWT.NONE
为c1
Composite
,使用SWT.V_SCROLL
给出了一个不必要的额外的滚动条。
由于您没有使用setExpandVertical
因此在setMinSize
没有意义。
所以这工作:
final ScrolledComposite sc1 = new ScrolledComposite(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
final Composite c1 = new Composite(sc1, SWT.NONE);
sc1.setContent(c1);
final GridLayout layout = new GridLayout();
layout.numColumns = 1;
c1.setLayout(layout);
final Button b1 = new Button (c1, SWT.PUSH);
b1.setText("first button");
c1.setSize(200,200);
final Button add = new Button(parent, SWT.PUSH);
add.setText("add children");
final int[] index = new int[]{0};
add.addListener(SWT.Selection, new Listener() {
public void handleEvent(final Event e) {
index[0]++;
final Button button = new Button(c1, SWT.PUSH);
button.setText("button "+index[0]);
// reset size of content so children can be seen - method 1
c1.setSize(c1.computeSize(SWT.DEFAULT, SWT.DEFAULT));
c1.layout();
}
});
您的代码中缺少三件事:
您的Composite
不应使用SWT.V_SCROLL
作为样式。 只需使用SWT.NONE
。
您应该在ScrolledComposite
上调用以下命令:
sc1.setExpandHorizontal(true); sc1.setExpandVertical(true);
更新侦听器中的最小大小:
c1.layout(); sc1.setMinSize(c1.computeSize(SWT.DEFAULT, SWT.DEFAULT));
尝试更改侦听器的实现。
scrolledComposite.addControlListener(new ControlAdapter() {
@Override
public void controlResized(ControlEvent e) {
scrolledComposite.setMinSize(cs1.computeSize(scrolledComposite.getClientArea().width, SWT.DEFAULT));
}
});
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