public abstract class InternalFrameFocusTraversalPolicy extends FocusTraversalPolicy
Constructor and Description |
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InternalFrameFocusTraversalPolicy() |
Modifier and Type | Method and Description |
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Component |
getInitialComponent(JInternalFrame frame)
返回当第一次选择JInternalFrame时应该接收焦点的组件。
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getComponentAfter, getComponentBefore, getDefaultComponent, getFirstComponent, getInitialComponent, getLastComponent
public Component getInitialComponent(JInternalFrame frame)
setSelected(true)
选择了setSelected(true)
,初始组件将不再被使用。
相反,如果JInternalFrame丢失并随后重新获得选择,或者使其成为隐形或不可显示,并随后显示和显示,则JInternalFrame最近关注的组件将成为焦点所有者。
此方法的默认实现将返回JInternalFrame的默认组件以进行对焦。
frame
- 要返回其初始组件的JInternalFrame
IllegalArgumentException
- 如果窗口为空
JInternalFrame.getMostRecentFocusOwner()
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