net.infonode.gui

Class ComponentUtil

public class ComponentUtil extends Object

Method Summary
static int	countComponents(Container c)
static Component	findComponentUnderGlassPaneAt(Point p, Component top)
static Component	findFirstComponentOfType(Component comp, Class c)
static Color	getBackgroundColor(Component component)
static String	getBorderLayoutOrientation(Direction d)
static Component	getChildAt(Container container, Point p)
static Component	getChildAtLine(Container container, Point p, boolean horizontal)
static int	getComponentIndex(Component component)
static void	getComponentTreePosition(Component c, ArrayList pos)
static int	getPreferredMaxHeight(Component[] components) Calculates preferred max height for the given components without checking isVisible.
static int	getPreferredMaxWidth(Component[] components) Calculates preferred max width for the given components without checking isVisible.
static Component	getTopLevelAncestor(Component c)
static Component	getVisibleChildAt(Container container, Point p)
static int	getVisibleChildrenCount(Component c)
static boolean	hasVisibleChildren(Component c)
static boolean	isFocusable(Component c)
static boolean	isOnlyVisibleComponent(Component c)
static boolean	isOnlyVisibleComponents(Component[] c)
static boolean	requestFocus(Component component) Requests focus unless the component already has focus.
static void	setAllOpaque(Container c, boolean opaque)
static Component	smartRequestFocus(Component component) Requests focus for a component.
static void	validate(JComponent c)
static void	validate(Component c)

Method Detail

countComponents

public static int countComponents(Container c)

findComponentUnderGlassPaneAt

public static Component findComponentUnderGlassPaneAt(Point p, Component top)

findFirstComponentOfType

public static Component findFirstComponentOfType(Component comp, Class c)

getBackgroundColor

public static Color getBackgroundColor(Component component)

getBorderLayoutOrientation

public static final String getBorderLayoutOrientation(Direction d)

getChildAt

public static final Component getChildAt(Container container, Point p)

getChildAtLine

public static final Component getChildAtLine(Container container, Point p, boolean horizontal)

getComponentIndex

public static final int getComponentIndex(Component component)

getComponentTreePosition

public static void getComponentTreePosition(Component c, ArrayList pos)

getPreferredMaxHeight

public static int getPreferredMaxHeight(Component[] components)

Calculates preferred max height for the given components without checking isVisible.

Parameters: components Components to check

Returns: max height

getPreferredMaxWidth

public static int getPreferredMaxWidth(Component[] components)

Calculates preferred max width for the given components without checking isVisible.

Parameters: components Components to check

Returns: max width

getTopLevelAncestor

public static Component getTopLevelAncestor(Component c)

getVisibleChildAt

public static final Component getVisibleChildAt(Container container, Point p)

getVisibleChildrenCount

public static int getVisibleChildrenCount(Component c)

hasVisibleChildren

public static boolean hasVisibleChildren(Component c)

isFocusable

public static boolean isFocusable(Component c)

isOnlyVisibleComponent

public static boolean isOnlyVisibleComponent(Component c)

isOnlyVisibleComponents

public static boolean isOnlyVisibleComponents(Component[] c)

requestFocus

public static boolean requestFocus(Component component)

Requests focus unless the component already has focus. For some weird reason calling Component#requestFocusInWindow()when the component is focus owner changes focus owner to another component!

Parameters: component the component to request focus for

Returns: true if the component has focus or probably will get focus, otherwise false

setAllOpaque

public static void setAllOpaque(Container c, boolean opaque)

smartRequestFocus

public static Component smartRequestFocus(Component component)

Requests focus for a component. If that's not possible it's FocusTraversalPolicyis checked. If that doesn't work all it's children is recursively checked with this method.

Parameters: component the component to request focus for

Returns: the component which has focus or probably will obtain focus, null if no component will receive focus

validate

public static void validate(JComponent c)

validate

public static void validate(Component c)