- All Implemented Interfaces:
- Serializable,- Comparable<Component.BaselineResizeBehavior>,- Constable
- Enclosing class:
- Component
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.- Since:
- 1.6
- See Also:
- 
Nested Class SummaryNested classes/interfaces declared in class java.lang.EnumEnum.EnumDesc<E extends Enum<E>>
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Enum Constant SummaryEnum ConstantsEnum ConstantDescriptionIndicates the baseline remains a fixed distance from the center of the component.Indicates the baseline remains fixed relative to the y-origin.Indicates the baseline remains fixed relative to the height and does not change as the width is varied.Indicates the baseline resize behavior can not be expressed using any of the other constants.
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Method SummaryModifier and TypeMethodDescriptionReturns the enum constant of this class with the specified name.static Component.BaselineResizeBehavior[]values()Returns an array containing the constants of this enum class, in the order they are declared.
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Enum Constant Details- 
CONSTANT_ASCENTIndicates the baseline remains fixed relative to the y-origin. That is,getBaselinereturns the same value regardless of the height or width. For example, aJLabelcontaining non-empty text with a vertical alignment ofTOPshould have a baseline type ofCONSTANT_ASCENT.
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CONSTANT_DESCENTIndicates 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 andgetBaseline(w, H)is the same. For example, aJLabelcontaining non-empty text with a vertical alignment ofBOTTOMshould have a baseline type ofCONSTANT_DESCENT.
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CENTER_OFFSETIndicates the baseline remains a fixed distance from the center of the component. That is, for any height H the difference betweengetBaseline(w, H)andH / 2is 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;
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OTHERIndicates the baseline resize behavior can not be expressed using any of the other constants. This may also indicate the baseline varies with the width of the component. This is also returned by components that do not have a baseline.
 
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Method Details- 
valuesReturns an array containing the constants of this enum class, in the order they are declared.- Returns:
- an array containing the constants of this enum class, in the order they are declared
 
- 
valueOfReturns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)- Parameters:
- name- the name of the enum constant to be returned.
- Returns:
- the enum constant with the specified name
- Throws:
- IllegalArgumentException- if this enum class has no constant with the specified name
- NullPointerException- if the argument is null
 
 
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