Package jmri.util

Class QuickPromptUtil

java.lang.Object

jmri.util.QuickPromptUtil

public class QuickPromptUtil
extends Object

A collection of utilities related to prompting for values

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static final class	QuickPromptUtil.FloatRangePredicate
(package private) static final class	QuickPromptUtil.IntRangePredicate

Constructor Summary

Constructors

Constructor	Description
QuickPromptUtil()

Method Summary

Modifier and Type	Method	Description
static Predicate<Integer>	checkIntRange(Integer min, Integer max, String valueLabel)	Creates a min/max predicate which will check the bounds.
static double	promptForDouble(Component parentComponent, String message, String title, double oldValue)	Utility function to prompt for new double value.
static float	promptForFloat(Component parentComponent, String message, String title, float oldValue)	Utility function to prompt for new float value.
static int	promptForInt(Component parentComponent, String message, String title, int oldValue)	Utility function to prompt for new integer value.
static Integer	promptForInteger(Component parentComponent, String message, String title, Integer oldValue, Predicate<Integer> validator)	Utility function to prompt for new integer value.
static String	promptForString(Component parentComponent, String message, String title, String oldValue)	Utility function to prompt for new string value.

Methods inherited from class java.lang.Object

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

Constructor Details

QuickPromptUtil

public QuickPromptUtil()

Method Details

promptForString

public static String promptForString(Component parentComponent,
 String message,
 String title,
 String oldValue)

Utility function to prompt for new string value.

Parameters:

parentComponent - the parent component

message - the prompt message

title - the dialog title

oldValue - the original string value

Returns:

the new string value

promptForInt

public static int promptForInt(Component parentComponent,
 String message,
 String title,
 int oldValue)

Utility function to prompt for new integer value.

Parameters:

parentComponent - the parent component

message - the prompt message

title - the dialog title

oldValue - the original integer value

Returns:

the new integer value

promptForInteger

public static Integer promptForInteger(Component parentComponent,
 @Nonnull
 String message,
 @Nonnull
 String title,
 Integer oldValue,
 @CheckForNull
 Predicate<Integer> validator)

Utility function to prompt for new integer value. Allows to constrain values using a Predicate (validator).

The validator may throw an IllegalArgumentException whose Throwable.getLocalizedMessage() will be displayed. The Predicate may also simply return false, which causes just general message (the value is invalid) to be printed. If the Predicate rejects the input, the OK button is disabled and the user is unable to confirm the dialog.

The function returns the original value if the dialog was cancelled or the entered value was empty or invalid. Otherwise, it returns the new value entered by the user.

Parameters:

parentComponent - the parent component

message - the prompt message.

title - title for the dialog

oldValue - the original value

validator - the validator instance. May be null

Returns:

the updated value, or the original one.

promptForFloat

public static float promptForFloat(Component parentComponent,
 String message,
 String title,
 float oldValue)

Utility function to prompt for new float value.

Parameters:

parentComponent - the parent component.

message - the prompt message

title - the dialog title

oldValue - the original float value

Returns:

the new float value

promptForDouble

public static double promptForDouble(Component parentComponent,
 String message,
 String title,
 double oldValue)

Utility function to prompt for new double value.

Parameters:

parentComponent - the parent component

message - the prompt message

title - the dialog title

oldValue - the original double value

Returns:

the new double value

checkIntRange

public static Predicate<Integer> checkIntRange(Integer min,
 Integer max,
 String valueLabel)

Creates a min/max predicate which will check the bounds. Suitable for promptForInteger(java.awt.Component, java.lang.String, java.lang.String, Integer, java.util.function.Predicate).

Parameters:

min - minimum value. Use Integer.MIN_VALUE to disable check.

max - maximum value, inclusive. Use Integer.MAX_VALUE to disable check.

valueLabel - label to be included in the message. Must be already I18Ned.

Returns:

predicate instance