Package io.github.olyutorskii.quetexj

Class HeightKeeper

java.lang.Object

io.github.olyutorskii.quetexj.HeightKeeper

public class HeightKeeper
extends Object

Automatically keep height of text component by chopping head of Document model.

Component is chopped row by row.

Physical text-line layout is preserved.

Relative position of vertical BoundedRangeModel is adjusted to keep JViewport view in JScrollPane as much as possible.

PlainDocument only supported.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEF_HEIGHTLIMIT	Default height limit.
static final int	DEF_NEWHEIGHT	Default new height.

Constructor Summary

Constructors

Constructor	Description
HeightKeeper(JTextArea textComp, BoundedRangeModel rangeModel)	Constructor.
HeightKeeper(JTextArea textComp, BoundedRangeModel rangeModel, int heightLimit, int newHeight)	Constructor.

Method Summary

Modifier and Type	Method	Description
BoundedRangeModel	getBoundedRangeModel()	Return associated BoundedRangeModel.
int	getHeightLimit()	Return height limit condition.
int	getNewHeight()	Return new height.
JTextComponent	getTextComponent()	Return associated text component.
void	setConditions(int heightLimitArg, int newHeightArg)	Set height condition values.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

DEF_HEIGHTLIMIT

public static final int DEF_HEIGHTLIMIT

Default height limit.

See Also:

• Constant Field Values

DEF_NEWHEIGHT

public static final int DEF_NEWHEIGHT

Default new height.

See Also:

• Constant Field Values

Constructor Details

HeightKeeper

public HeightKeeper(JTextArea textComp,
 BoundedRangeModel rangeModel)

Constructor.

Condition parameters are default value.

Parameters:

textComp - text component

rangeModel - bounded range model

HeightKeeper

public HeightKeeper(JTextArea textComp,
 BoundedRangeModel rangeModel,
 int heightLimit,
 int newHeight)

Constructor.

• newHeight must be positive integer value.
• newHeight must be smaller than heightLimit.

Parameters:

textComp - text component

rangeModel - bounded range model

heightLimit - height limit condition

newHeight - new height when over limit

Throws:

IllegalArgumentException - illegal integer argument

Method Details

getTextComponent

public JTextComponent getTextComponent()

Return associated text component.

Returns:

text component

getBoundedRangeModel

public BoundedRangeModel getBoundedRangeModel()

Return associated BoundedRangeModel.

Returns:

BoundedRangeModel

getHeightLimit

public int getHeightLimit()

Return height limit condition.

Returns:

height limit

getNewHeight

public int getNewHeight()

Return new height.

Returns:

new height

setConditions

public void setConditions(int heightLimitArg,
 int newHeightArg)
                   throws IllegalArgumentException

Set height condition values.

• newHeightArg must be positive integer value.
• newHeightArg must be smaller than heightLimitArg.

Parameters:

heightLimitArg - height limit condition

newHeightArg - new height when over limit

Throws:

IllegalArgumentException - illegal integer argument