|
Java™ Platform Standard Ed. 6 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | ENUM CONSTANTS | FIELD | METHOD | DETAIL: ENUM CONSTANTS | FIELD | METHOD |
java.lang.Object java.lang.Enum<Component.BaselineResizeBehavior> java.awt.Component.BaselineResizeBehavior
public static enum Component.BaselineResizeBehavior
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.
Component.getBaselineResizeBehavior()
,
Component.getBaseline(int,int)
Enum Constant Summary | |
---|---|
CENTER_OFFSET
Indicates the baseline remains a fixed distance from the center of the component. |
|
CONSTANT_ASCENT
Indicates the baseline remains fixed relative to the y-origin. |
|
CONSTANT_DESCENT
Indicates the baseline remains fixed relative to the height and does not change as the width is varied. |
|
OTHER
Indicates the baseline resize behavior can not be expressed using any of the other constants. |
Method Summary | |
---|---|
static Component.BaselineResizeBehavior |
valueOf(String name)
Returns the enum constant of this type with the specified name. |
static Component.BaselineResizeBehavior[] |
values()
Returns an array containing the constants of this enum type, in the order they are declared. |
Methods inherited from class java.lang.Enum |
---|
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf |
Methods inherited from class java.lang.Object |
---|
getClass, notify, notifyAll, wait, wait, wait |
Enum Constant Detail |
---|
public static final Component.BaselineResizeBehavior CONSTANT_ASCENT
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
.
public static final Component.BaselineResizeBehavior CONSTANT_DESCENT
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
.
public static final Component.BaselineResizeBehavior CENTER_OFFSET
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;
public static final Component.BaselineResizeBehavior OTHER
Method Detail |
---|
public static Component.BaselineResizeBehavior[] values()
for (Component.BaselineResizeBehavior c : Component.BaselineResizeBehavior.values()) System.out.println(c);
public static Component.BaselineResizeBehavior valueOf(String name)
name
- the name of the enum constant to be returned.
IllegalArgumentException
- if this enum type has no constant
with the specified name
NullPointerException
- if the argument is null
|
Java™ Platform Standard Ed. 6 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | ENUM CONSTANTS | FIELD | METHOD | DETAIL: ENUM CONSTANTS | FIELD | METHOD |
Copyright © 1993, 2010, Oracle and/or its affiliates. All rights reserved.