Component.BaselineResizeBehavior JDK 1.6)

Description

publicfinalstatic enum Component.BaselineResizeBehavior

Enumeration of the common ways the baseline of a component can change as the size changes.

Enumeration of the common ways the baseline of a component can
change as the size changes. The baseline resize behavior is
primarily for layout managers that need to know how the
position of the baseline changes as the component size changes.
In general the baseline resize behavior will be valid for sizes
greater than or equal to the minimum size (the actual minimum
size; not a developer specified minimum size). For sizes
smaller than the minimum size the baseline may change in a way
other than the baseline resize behavior indicates. Similarly,
as the size approaches Integer.MAX_VALUE and/or
Short.MAX_VALUE the baseline may change in a way
other than the baseline resize behavior indicates.

See also: Component.getBaselineResizeBehavior() Component.getBaseline(int,int)

Enum Constants

CONSTANT_ASCENT

Indicates the baseline remains fixed relative to the y-origin.

Indicates the baseline remains fixed relative to the
y-origin. That is, getBaseline returns
the same value regardless of the height or width. For example, a
JLabel containing non-empty text with a
vertical alignment of TOP should have a
baseline type of CONSTANT_ASCENT.

CONSTANT_DESCENT

Indicates the baseline remains fixed relative to the height and does not change as the width is varied.

Indicates the baseline remains fixed relative to the height
and does not change as the width is varied. That is, for
any height H the difference between H and
getBaseline(w, H) is the same. For example, a
JLabel containing non-empty text with a
vertical alignment of BOTTOM should have a
baseline type of CONSTANT_DESCENT.

CENTER_OFFSET

Indicates the baseline remains a fixed distance from the center of the component.

Indicates the baseline remains a fixed distance from the center of the component. That is, for any height H the difference between getBaseline(w, H) and H / 2 is the same (plus or minus one depending upon rounding error).

Because of possible rounding errors it is recommended you ask for the baseline with two consecutive heights and use the return value to determine if you need to pad calculations by 1. The following shows how to calculate the baseline for any height:

   Dimension preferredSize = component.getPreferredSize();
   int baseline = getBaseline(preferredSize.width,
                              preferredSize.height);
   int nextBaseline = getBaseline(preferredSize.width,
                                  preferredSize.height + 1);
   // Amount to add to height when calculating where baseline
   // lands for a particular height:
   int padding = 0;
   // Where the baseline is relative to the mid point
   int baselineOffset = baseline - height / 2;
   if (preferredSize.height % 2 == 0 &&
       baseline != nextBaseline) {
       padding = 1;
   }
   else if (preferredSize.height % 2 == 1 &&
            baseline == nextBaseline) {
       baselineOffset--;
       padding = 1;
   }
   // The following calculates where the baseline lands for
   // the height z:
   int calculatedBaseline = (z + padding) / 2 + baselineOffset;

OTHER

Indicates the baseline resize behavior can not be expressed using any of the other constants.

Methods

Hide/Show inherited methods

protectedfinal Object clone () throws CloneNotSupportedException [Inherited From Enum]

Throws CloneNotSupportedException.

publicfinal int compareTo ( E o) [Inherited From Enum]

Compares this enum with the specified object for order.

publicfinal boolean equals (Object other) [Inherited From Enum]

Returns true if the specified object is equal to this enum constant.

protectedfinal void finalize () [Inherited From Enum]

enum classes cannot have finalize methods.

publicfinal Class< E> getDeclaringClass () [Inherited From Enum]

Returns the Class object corresponding to this enum constant's enum type.

publicfinal int hashCode () [Inherited From Enum]

Returns a hash code for this enum constant.

publicfinal String name () [Inherited From Enum]

Returns the name of this enum constant, exactly as declared in its enum declaration.

publicfinal int ordinal () [Inherited From Enum]

Returns the ordinal of this enumeration constant (its position in its enum declaration, where the initial constant is assigned an ordinal of zero).

public String toString () [Inherited From Enum]

Returns the name of this enum constant, as contained in the declaration.

publicstatic T valueOf (Class< T> enumType, String name) [Inherited From Enum]

Returns the enum constant of the specified enum type with the specified name.

publicstatic BaselineResizeBehavior valueOf (String name)

publicfinalstatic BaselineResizeBehavior values ()