在SWT中制作复合材料 [英] Making composite focusable in SWT

问题描述

有没有可能在SWT中创建一个可调焦的组合？我通过显示过滤器捕获所有键盘事件，但是当焦点位于树或列表上时会出现一些问题 - GTK +的默认操作是在控件的内容中搜索。

我想要做的是将SWT和AWT与可聚焦的AWT组件混合。我设法使AWT小部件不可聚焦，我添加了显示过滤器，使AWT组件接收键盘事件（但不是直接），即使它没有被聚焦。但是，当一些SWT控件集中时，有几个问题 - 这就是为什么我想要复合可聚焦。所以我的最后一个问题是：是否有可能使SWT组合可聚焦如果 Composite 包含子窗口小部件，则默认操作是选择时放弃焦点。为了避免这种情况，首先扩展 Composite 类，如下所示：

 类FocusableComposite扩展复合
 {
 public FocusableComposite（Composite parent，int style）
 {
 super（parent，style）; 
 
 
 public boolean setFocus（）
 {
 return super.forceFocus（）;然后使用 MouseListener  
 $ b  

/ code>在FocusableComposite的一个新实例上直接点击 Composite 时直接调用setFocus（）：



  Composite composite = new FocusableComposite（shell，SWT.NONE）; 
 
 composite.addMouseListener（new MouseAdapter（）
 {
 public void mouseDown（MouseEvent event）
 {
（（Composite）event.widget）。 setFocus（）; 
} 
}）; 
  




Is it possible to create a focusable composite in SWT? I'm catching all keyboard events via Display filter, but there are some problems when the focus is on the tree or list - GTK+'s default action is to search in the contents of the control.

What I want to do is to mix SWT and AWT with focusable AWT component. I managed to make the AWT widget unfocusable and I added Display filter to make the AWT component receiving keyboard events (but not directly), even when it's not focused. But there are several problems when some SWT controls are focused - that's why I want to make composite focusable.

So my final question is: is it possible to make SWT composite focusable?

解决方案

If a Composite contains child widgets, the default action is to give up focus when it is selected. To circumvent this, start by extending the Composite class as such:

class FocusableComposite extends Composite
{
    public FocusableComposite(Composite parent, int style)
    {
        super(parent, style);
    }

    public boolean setFocus()
    {
        return super.forceFocus();
    }
}

Then use a MouseListener on a new instantiation of FocusableComposite to call setFocus() directly whenever the Composite is clicked:

Composite composite = new FocusableComposite(shell, SWT.NONE);

composite.addMouseListener(new MouseAdapter()
{
    public void mouseDown(MouseEvent event)
    {
        ((Composite)event.widget).setFocus();
    }
});

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