jdk.awt.ComponentOrientation
The ComponentOrientation class encapsulates the language-sensitive orientation that is to be used to order the elements of a component or of text. It is used to reflect the differences in this ordering between Western alphabets, Middle Eastern (such as Hebrew), and Far Eastern (such as Japanese).
Fundamentally, this governs items (such as characters) which are laid out in lines, with the lines then laid out in a block. This also applies to items in a widget: for example, in a check box where the box is positioned relative to the text.
There are four different orientations used in modern languages as in the following table.
LT RT TL TR A B C C B A A D G G D A D E F F E D B E H H E B G H I I H G C F I I F C (In the header, the two-letter abbreviation represents the item direction in the first letter, and the line direction in the second. For example, LT means "items left-to-right, lines top-to-bottom", TL means "items top-to-bottom, lines left-to-right", and so on.)
The orientations are:
LT - Western Europe (optional for Japanese, Chinese, Korean) RT - Middle East (Arabic, Hebrew) TR - Japanese, Chinese, Korean TL - Mongolian
Components whose view and controller code depends on orientation should use the isLeftToRight() and isHorizontal() methods to determine their behavior. They should not include switch-like code that keys off of the constants, such as:
if (orientation == LEFT_TO_RIGHT) { ... } else if (orientation == RIGHT_TO_LEFT) { ... } else { // Oops } This is unsafe, since more constants may be added in the future and since it is not guaranteed that orientation objects will be unique.
The ComponentOrientation class encapsulates the language-sensitive
orientation that is to be used to order the elements of a component
or of text. It is used to reflect the differences in this ordering
between Western alphabets, Middle Eastern (such as Hebrew), and Far
Eastern (such as Japanese).
Fundamentally, this governs items (such as characters) which are laid out
in lines, with the lines then laid out in a block. This also applies
to items in a widget: for example, in a check box where the box is
positioned relative to the text.
There are four different orientations used in modern languages
as in the following table.
LT RT TL TR
A B C C B A A D G G D A
D E F F E D B E H H E B
G H I I H G C F I I F C
(In the header, the two-letter abbreviation represents the item direction
in the first letter, and the line direction in the second. For example,
LT means "items left-to-right, lines top-to-bottom",
TL means "items top-to-bottom, lines left-to-right", and so on.)
The orientations are:
LT - Western Europe (optional for Japanese, Chinese, Korean)
RT - Middle East (Arabic, Hebrew)
TR - Japanese, Chinese, Korean
TL - Mongolian
Components whose view and controller code depends on orientation
should use the isLeftToRight() and
isHorizontal() methods to
determine their behavior. They should not include switch-like
code that keys off of the constants, such as:
if (orientation == LEFT_TO_RIGHT) {
...
} else if (orientation == RIGHT_TO_LEFT) {
...
} else {
// Oops
}
This is unsafe, since more constants may be added in the future and
since it is not guaranteed that orientation objects will be unique.*-left-to-rightclj
Static Constant.
Items run left to right and lines flow top to bottom Examples: English, French.
type: java.awt.ComponentOrientation
Static Constant. Items run left to right and lines flow top to bottom Examples: English, French. type: java.awt.ComponentOrientation
*-right-to-leftclj
Static Constant.
Items run right to left and lines flow top to bottom Examples: Arabic, Hebrew.
type: java.awt.ComponentOrientation
Static Constant. Items run right to left and lines flow top to bottom Examples: Arabic, Hebrew. type: java.awt.ComponentOrientation
*-unknownclj
Static Constant.
Indicates that a component's orientation has not been set. To preserve the behavior of existing applications, isLeftToRight will return true for this value.
type: java.awt.ComponentOrientation
Static Constant. Indicates that a component's orientation has not been set. To preserve the behavior of existing applications, isLeftToRight will return true for this value. type: java.awt.ComponentOrientation
*get-orientationclj
(*get-orientation locale)Returns the orientation that is appropriate for the given locale.
locale - the specified locale - java.util.Locale
returns: java.awt.ComponentOrientation
Returns the orientation that is appropriate for the given locale. locale - the specified locale - `java.util.Locale` returns: `java.awt.ComponentOrientation`
horizontal?clj
(horizontal? this)Are lines horizontal? This will return true for horizontal, left-to-right writing systems such as Roman.
returns: boolean
Are lines horizontal? This will return true for horizontal, left-to-right writing systems such as Roman. returns: `boolean`
left-to-right?clj
(left-to-right? this)HorizontalLines: Do items run left-to-right? Vertical Lines: Do lines run left-to-right? This will return true for horizontal, left-to-right writing systems such as Roman.
returns: boolean
HorizontalLines: Do items run left-to-right? Vertical Lines: Do lines run left-to-right? This will return true for horizontal, left-to-right writing systems such as Roman. returns: `boolean`
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