Java Container.getFocusTraversalPolicy方法代码示例

import java.awt.Container; //导入方法依赖的package包/类
@Override
public void actionPerformed(ActionEvent e) {
    int selIndexBefore = getSelectedIndex();
    defaultAction.actionPerformed( e );
    int selIndexCurrent = getSelectedIndex();
    if( selIndexBefore != selIndexCurrent )
        return;
    
    if( focusNext && 0 == selIndexCurrent && getModel().getSize() > 1 && getModel().getSize() > getColumnCount() )
        return;
    
    KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager();
    Container container = kfm.getCurrentFocusCycleRoot();
    FocusTraversalPolicy policy = container.getFocusTraversalPolicy();
    if( null == policy )
        policy = kfm.getDefaultFocusTraversalPolicy();
    Component next = focusNext ? policy.getComponentAfter( container, CategoryList.this )
                              : policy.getComponentBefore( container, CategoryList.this );
    if( null != next && next instanceof CategoryButton ) {
        clearSelection();
        next.requestFocus();
    }
}
 

import java.awt.Container; //导入方法依赖的package包/类
/**
 * Requests focus on a child of the spinner if the spinner doesn't have
 * focus.
 */
private void focusSpinnerIfNecessary()
{
	Component fo = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
	if( spinner.isRequestFocusEnabled() && (fo == null || !SwingUtilities.isDescendingFrom(fo, spinner)) )
	{
		Container root = spinner;

		if( !root.isFocusCycleRoot() )
		{
			root = root.getFocusCycleRootAncestor();
		}
		if( root != null )
		{
			FocusTraversalPolicy ftp = root.getFocusTraversalPolicy();
			Component child = ftp.getComponentAfter(root, spinner);

			if( child != null && SwingUtilities.isDescendingFrom(child, spinner) )
			{
				child.requestFocus();
			}
		}
	}
}
 

import java.awt.Container; //导入方法依赖的package包/类
public Component getComponentAfter(Container aContainer,
                                   Component aComponent)
{
    Container root = (aContainer.isFocusCycleRoot())
        ? aContainer
        : aContainer.getFocusCycleRootAncestor();

    // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
    // traversal policy is non-legacy, then honor it.
    if (root != null) {
        FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
        if (policy != gluePolicy) {
            return policy.getComponentAfter(root, aComponent);
        }

        comparator.setComponentOrientation(root.getComponentOrientation());
        return layoutPolicy.getComponentAfter(root, aComponent);
    }

    return null;
}
 

import java.awt.Container; //导入方法依赖的package包/类
public Component getComponentBefore(Container aContainer,
                                    Component aComponent)
{
    Container root = (aContainer.isFocusCycleRoot())
        ? aContainer
        : aContainer.getFocusCycleRootAncestor();

    // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
    // traversal policy is non-legacy, then honor it.
    if (root != null) {
        FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
        if (policy != gluePolicy) {
            return policy.getComponentBefore(root, aComponent);
        }

        comparator.setComponentOrientation(root.getComponentOrientation());
        return layoutPolicy.getComponentBefore(root, aComponent);
    }

    return null;
}
 

import java.awt.Container; //导入方法依赖的package包/类
public Component getFirstComponent(Container aContainer) {
    Container root = (aContainer.isFocusCycleRoot())
        ? aContainer
        : aContainer.getFocusCycleRootAncestor();

    // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
    // traversal policy is non-legacy, then honor it.
    if (root != null) {
        FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
        if (policy != gluePolicy) {
            return policy.getFirstComponent(root);
        }

        comparator.setComponentOrientation(root.getComponentOrientation());
        return layoutPolicy.getFirstComponent(root);
    }

    return null;
}
 

import java.awt.Container; //导入方法依赖的package包/类
public Component getLastComponent(Container aContainer) {
    Container root = (aContainer.isFocusCycleRoot())
        ? aContainer
        : aContainer.getFocusCycleRootAncestor();

    // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
    // traversal policy is non-legacy, then honor it.
    if (root != null) {
        FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
        if (policy != gluePolicy) {
            return policy.getLastComponent(root);
        }

        comparator.setComponentOrientation(root.getComponentOrientation());
        return layoutPolicy.getLastComponent(root);
    }

    return null;
}
 

import java.awt.Container; //导入方法依赖的package包/类
/**
 * Returns the component after.
 * @return the component after
 * @param aContainer a container
 * @param aComponent a component
 */
public Component getComponentAfter(Container aContainer,
                                   Component aComponent)
{
    Container root = (aContainer.isFocusCycleRoot())
        ? aContainer
        : aContainer.getFocusCycleRootAncestor();

    // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
    // traversal policy is non-legacy, then honor it.
    if (root != null) {
        FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
        if (policy != gluePolicy) {
            return policy.getComponentAfter(root, aComponent);
        }

        comparator.setComponentOrientation(root.getComponentOrientation());
        return layoutPolicy.getComponentAfter(root, aComponent);
    }

    return null;
}
 

import java.awt.Container; //导入方法依赖的package包/类
/**
 * Returns the component before.
 * @return the component before
 * @param aContainer a container
 * @param aComponent a component
 */
public Component getComponentBefore(Container aContainer,
                                    Component aComponent)
{
    Container root = (aContainer.isFocusCycleRoot())
        ? aContainer
        : aContainer.getFocusCycleRootAncestor();

    // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
    // traversal policy is non-legacy, then honor it.
    if (root != null) {
        FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
        if (policy != gluePolicy) {
            return policy.getComponentBefore(root, aComponent);
        }

        comparator.setComponentOrientation(root.getComponentOrientation());
        return layoutPolicy.getComponentBefore(root, aComponent);
    }

    return null;
}
 

import java.awt.Container; //导入方法依赖的package包/类
/**
 * Returns the first component.
 * @return the first component
 * @param aContainer a container
 */
public Component getFirstComponent(Container aContainer) {
    Container root = (aContainer.isFocusCycleRoot())
        ? aContainer
        : aContainer.getFocusCycleRootAncestor();

    // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
    // traversal policy is non-legacy, then honor it.
    if (root != null) {
        FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
        if (policy != gluePolicy) {
            return policy.getFirstComponent(root);
        }

        comparator.setComponentOrientation(root.getComponentOrientation());
        return layoutPolicy.getFirstComponent(root);
    }

    return null;
}
 

import java.awt.Container; //导入方法依赖的package包/类
/**
 * Returns the last component.
 * @return the last component
 * @param aContainer a container
 */
public Component getLastComponent(Container aContainer) {
    Container root = (aContainer.isFocusCycleRoot())
        ? aContainer
        : aContainer.getFocusCycleRootAncestor();

    // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
    // traversal policy is non-legacy, then honor it.
    if (root != null) {
        FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
        if (policy != gluePolicy) {
            return policy.getLastComponent(root);
        }

        comparator.setComponentOrientation(root.getComponentOrientation());
        return layoutPolicy.getLastComponent(root);
    }

    return null;
}
 

import java.awt.Container; //导入方法依赖的package包/类
@Override
public void actionPerformed(ActionEvent e) {
    setFocusCycleRoot(false);
    try {
        Container con = ETable.this.getFocusCycleRootAncestor();
        if (con != null) {
            /*
            Component target = ETable.this;
            if (getParent() instanceof JViewport) {
                target = getParent().getParent();
                if (target == con) {
                    target = ETable.this;
                }
            }
            */

            EventObject eo = EventQueue.getCurrentEvent();
            boolean backward = false;
            if (eo instanceof KeyEvent) {
                backward = 
                    (((KeyEvent) eo).getModifiers() 
                    & KeyEvent.SHIFT_MASK) 
                    != 0 && (((KeyEvent) eo).getModifiersEx() & 
                    KeyEvent.SHIFT_DOWN_MASK) != 0;
            }

            Component c = ETable.this;
            Component to;
            Container parentWithFTP = null;
            do {
                FocusTraversalPolicy ftp = con.getFocusTraversalPolicy();
                to = backward ? ftp.getComponentBefore(con, c)
                              : ftp.getComponentAfter(con, c);


                if (to == ETable.this) {
                    to = backward ? ftp.getFirstComponent(con)
                                  : ftp.getLastComponent(con);
                }
                if (to == ETable.this) {
                    parentWithFTP = con.getParent();
                    if (parentWithFTP != null) {
                        parentWithFTP = parentWithFTP.getFocusCycleRootAncestor();
                    }
                    if (parentWithFTP != null) {
                        c = con;
                        con = parentWithFTP;
                    }
                }
            } while (to == ETable.this && parentWithFTP != null);
            if (to != null) {
                to.requestFocus();
            }
        }
    } finally {
        setFocusCycleRoot(true);
    }
}