Package jmri.jmrit.symbolicprog

Class CompositeVariableValue

java.lang.Object

jmri.jmrit.symbolicprog.AbstractValue

jmri.jmrit.symbolicprog.VariableValue

jmri.jmrit.symbolicprog.EnumVariableValue

jmri.jmrit.symbolicprog.CompositeVariableValue

All Implemented Interfaces:

ActionListener, PropertyChangeListener, EventListener

public class CompositeVariableValue
extends EnumVariableValue

Extends EnumVariableValue to represent a composition of variable values.

Internally, each "choice" is stored as a list of "setting" items. Numerical values for this type of variable (itself) are strictly sequential, because they are arbitrary.

This version of the class has certain limitations:

1. Variables referenced in the definition of one of these must have already been declared earlier in the decoder file. This prevents circular references, and makes it much easier to find the target variables.
2. This version of the variable never changes "State" (color), though it does track its value from changes to other variables.
3. There should be a final choice (entry) that doesn't define any settings. This will then form the default value when the target variables change.
4. Programming operations on a variable of this type doesn't do anything, because there doesn't seem to be a consistent model of what "read changes" and "write changes" should do. This has two implications:
   • Variables referenced as targets must appear on some programming pane, or they won't be updated by programming operations.
   • If this variable references variables that are not on this pane, the user needs to do a read/write all panes operation to record the changes made to this variable.
   It's therefore recommended that a CompositeVariableValue just make changes to target variables on the same programming page.
5. To apply a mask when setting a value, use an intermediary variable set from here, which in turn references the goal variable with a mask.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	CompositeVariableValue.Setting	Define objects to save and manipulate a particular setting.
(package private) static class	CompositeVariableValue.SettingList	Defines a list of Setting objects.

Nested classes/interfaces inherited from class jmri.jmrit.symbolicprog.EnumVariableValue

EnumVariableValue.TreeLeafNode, EnumVariableValue.VarComboBox

Nested classes/interfaces inherited from class jmri.jmrit.symbolicprog.AbstractValue

AbstractValue.ValueState

Field Summary

Fields

Modifier and Type	Field	Description
(package private) boolean	amReading
(package private) boolean	amWriting
(package private) Hashtable<String,CompositeVariableValue.SettingList>	choiceHash
(package private) boolean	readingChanges
(package private) HashSet<VariableValue>	variables
(package private) boolean	writingChanges

Fields inherited from class jmri.jmrit.symbolicprog.EnumVariableValue

_defaultColor, _maxVal, _minVal, _value, treeNodes

Fields inherited from class jmri.jmrit.symbolicprog.VariableValue

_cvMap, _status, _tooltipText

Fields inherited from class jmri.jmrit.symbolicprog.AbstractValue

prop

Constructor Summary

Constructors

Constructor	Description
CompositeVariableValue()	Create a null object.
CompositeVariableValue(String name, String comment, String cvName, boolean readOnly, boolean infoOnly, boolean writeOnly, boolean opsOnly, String cvNum, String mask, int minVal, int maxVal, HashMap<String,CvValue> v, JLabel status, String stdname)

Method Summary

Modifier and Type	Method	Description
void	actionPerformed(ActionEvent e)
void	addChoice(String name)	Create a new possible selection.
void	addSetting(String choice, String varName, VariableValue variable, String value)	Add a setting to an existing choice.
protected void	continueRead()	See if there's anything to read, and if so do it.
protected void	continueWrite()	See if there's anything to write, and if so do it.
void	dispose()	Dispose of the object.
(package private) void	findValue()	Suspect underlying variables have changed value; check.
Component	getCommonRep()	Get a display representation Object of this variable.
int	getIntValue()	Get the value as a single integer.
boolean	isChanged()	Determine whether this Variable is "changed", so that "read changes" and "write changes" will act on it.
boolean	isToRead()	This variable needs to be read if any of its subsidiary variables needs to be read.
boolean	isToWrite()	This variable needs to be written if any of its subsidiary variables needs to be written.
void	lastItem()	Do end of initialization processing.
void	propertyChange(PropertyChangeEvent e)
Object	rangeVal()	Gets a (usually text) description of the variable type and range.
void	readAll()	Always read the contents of this Variable.
void	readChanges()	Read the contents of this Variable if it's in a state that indicates it was "changed".
protected void	selectValue(int value)	Set to a specific value.
void	setCvState(AbstractValue.ValueState state)	Notify the connected CVs of a state change from above by way of the variables (e.g. not direct to CVs).
void	setState(AbstractValue.ValueState state)	This variable doesn't change state, hence doesn't change color.
void	setToolTipText(String t)	Set tooltip text to be used by both the "value" and representations of this Variable.
void	setToRead(boolean state)	Mark whether this object needs to be read.
void	setToWrite(boolean state)	Mark whether this object needs to be written.
void	setValue(int value)
CvValue[]	usesCVs()	Provide access to CVs used by this Variable.
void	writeAll()	Always write the contents of this Variable.
void	writeChanges()	Write the contents of this Variable if it's in a state that indicates it was "changed".

Methods inherited from class jmri.jmrit.symbolicprog.EnumVariableValue

addItem, addItem, disposeReps, endGroup, getNewRep, getTextValue, getValueObject, getValueString, nItems, setAvailable, setColor, setIntValue, startGroup

Methods inherited from class jmri.jmrit.symbolicprog.VariableValue

confirmAll, considerChanged, cvName, getComment, getCvDescription, getCvName, getCvNum, getInfoOnly, getLongValue, getMask, getMaxMask, getOpsOnly, getReadOnly, getState, getValueInCV, getWriteOnly, isBitMask, isBusy, item, label, maskValAsInt, offsetVal, setBusy, setValue, setValueInCV, simplifyMask, updatedTextField, updateRepresentation

Methods inherited from class jmri.jmrit.symbolicprog.AbstractValue

addPropertyChangeListener, getAvailable, removePropertyChangeListener

Methods inherited from class java.lang.Object

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

Field Details

choiceHash

Hashtable<String,CompositeVariableValue.SettingList> choiceHash

variables

HashSet<VariableValue> variables

amReading

boolean amReading

readingChanges

boolean readingChanges

amWriting

boolean amWriting

writingChanges

boolean writingChanges

Constructor Details

CompositeVariableValue

public CompositeVariableValue(String name,
 String comment,
 String cvName,
 boolean readOnly,
 boolean infoOnly,
 boolean writeOnly,
 boolean opsOnly,
 String cvNum,
 String mask,
 int minVal,
 int maxVal,
 HashMap<String,CvValue> v,
 JLabel status,
 String stdname)

CompositeVariableValue

public CompositeVariableValue()

Create a null object. Normally only used for tests and to pre-load classes.

Method Details

usesCVs

public CvValue[] usesCVs()

Description copied from class: VariableValue

Provide access to CVs used by this Variable.

Overrides:

usesCVs in class EnumVariableValue

Returns:

an array of CVs used by this Variable

addChoice

public void addChoice(String name)

Create a new possible selection.

Parameters:

name - Name of the choice being added

addSetting

public void addSetting(String choice,
 String varName,
 VariableValue variable,
 String value)

Add a setting to an existing choice.

Parameters:

choice - existing choice.

varName - variable name.

variable - variable value.

value - setting value.

lastItem

public void lastItem()

Do end of initialization processing.

Overrides:

lastItem in class EnumVariableValue

setToolTipText

public void setToolTipText(String t)

Description copied from class: VariableValue

Set tooltip text to be used by both the "value" and representations of this Variable.

This is expected to be overridden in subclasses to change their internal info.

Overrides:

setToolTipText in class EnumVariableValue

Parameters:

t - the tooltip text to be used

See Also:

• VariableValue.updateRepresentation(javax.swing.JComponent)

rangeVal

public Object rangeVal()

Description copied from class: VariableValue

Gets a (usually text) description of the variable type and range.

Overrides:

rangeVal in class EnumVariableValue

Returns:

description of the variable type and range

actionPerformed

public void actionPerformed(ActionEvent e)

Specified by:

actionPerformed in interface ActionListener

Overrides:

actionPerformed in class EnumVariableValue

setState

public void setState(AbstractValue.ValueState state)

This variable doesn't change state, hence doesn't change color.

Overrides:

setState in class VariableValue

Parameters:

state - the desired state as per definitions in AbstractValue

See Also:

• AbstractValue

selectValue

protected void selectValue(int value)

Set to a specific value.

Does this by delegating to the SettingList

Overrides:

selectValue in class EnumVariableValue

Parameters:

value - What to set to.

getIntValue

public int getIntValue()

Description copied from class: VariableValue

Get the value as a single integer.

In some cases, e.g. speed tables, this will result in complex behavior, where setIntValue(getIntValue()) results in something unexpected.

Overrides:

getIntValue in class EnumVariableValue

Returns:

the value as an integer

getCommonRep

public Component getCommonRep()

Description copied from class: VariableValue

Get a display representation Object of this variable.

The actual stored value of a variable is not the most interesting thing. Instead, you usually get an Object representation for display in a table, etc. Modification of the state of that object then gets reflected back, causing the underlying CV objects to change.

Overrides:

getCommonRep in class EnumVariableValue

Returns:

the Object representation for display purposes

setValue

public void setValue(int value)

Overrides:

setValue in class EnumVariableValue

setCvState

public void setCvState(AbstractValue.ValueState state)

Notify the connected CVs of a state change from above by way of the variables (e.g. not direct to CVs).

Overrides:

setCvState in class EnumVariableValue

Parameters:

state - the new state to set

isChanged

public boolean isChanged()

Description copied from class: VariableValue

Determine whether this Variable is "changed", so that "read changes" and "write changes" will act on it.

Overrides:

isChanged in class EnumVariableValue

Returns:

true if Variable is "changed"

See Also:

• VariableValue.considerChanged(jmri.jmrit.symbolicprog.CvValue)

setToRead

public void setToRead(boolean state)

Description copied from class: VariableValue

Mark whether this object needs to be read.

Simple implementation for the case of a single CV. Intended to be sufficient for many subclasses.

Overrides:

setToRead in class VariableValue

Parameters:

state - true if the object needs to be read, false otherwise

See Also:

• AbstractValue

isToRead

public boolean isToRead()

This variable needs to be read if any of its subsidiary variables needs to be read.

Overrides:

isToRead in class VariableValue

Returns:

true if the object needs to be read, false otherwise

See Also:

• AbstractValue

setToWrite

public void setToWrite(boolean state)

Description copied from class: VariableValue

Mark whether this object needs to be written.

Simple implementation for the case of a single CV. Intended to be sufficient for many subclasses.

Overrides:

setToWrite in class VariableValue

Parameters:

state - true if the object needs to be written, false otherwise

See Also:

• AbstractValue

isToWrite

public boolean isToWrite()

This variable needs to be written if any of its subsidiary variables needs to be written.

Overrides:

isToWrite in class VariableValue

Returns:

true if the object needs to be written, false otherwise

See Also:

• AbstractValue

readChanges

public void readChanges()

Description copied from class: VariableValue

Read the contents of this Variable if it's in a state that indicates it was "changed".

Overrides:

readChanges in class EnumVariableValue

See Also:

• VariableValue.isChanged()

writeChanges

public void writeChanges()

Description copied from class: VariableValue

Write the contents of this Variable if it's in a state that indicates it was "changed".

Overrides:

writeChanges in class EnumVariableValue

See Also:

• VariableValue.isChanged()

readAll

public void readAll()

Description copied from class: VariableValue

Always read the contents of this Variable.

Overrides:

readAll in class EnumVariableValue

continueRead

protected void continueRead()

See if there's anything to read, and if so do it.

writeAll

public void writeAll()

Description copied from class: VariableValue

Always write the contents of this Variable.

Overrides:

writeAll in class EnumVariableValue

continueWrite

protected void continueWrite()

See if there's anything to write, and if so do it.

propertyChange

public void propertyChange(PropertyChangeEvent e)

Specified by:

propertyChange in interface PropertyChangeListener

Overrides:

propertyChange in class EnumVariableValue

findValue

void findValue()

Suspect underlying variables have changed value; check. First match will succeed, so there should not be multiple matches possible. ("First match" is defined in choice-sequence).

dispose

public void dispose()

Description copied from class: VariableValue

Dispose of the object.

Overrides:

dispose in class EnumVariableValue