org.opennms.features.jmxconfiggenerator.webui.ui

Class UIHelper

java.lang.Object

org.opennms.features.jmxconfiggenerator.webui.ui.UIHelper

public abstract class UIHelper
extends Object

This class provides several helper methods for ui stuff, e.g. creating a button. So the amount of code is reduced generally.

Author:

Markus von Rüden

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	UIHelper.LayoutCreator Helper to create a layout (Horizontal, Vertical, Form, ...) with none, one or multiple components and allow basic configuration of the layout using fluent API.

Constructor Summary

Constructors

Constructor and Description
UIHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static void	closeSilently(Closeable closeable) Closes the given Closeable silently.
static com.vaadin.ui.Button	createButton(String buttonCaption, String iconName)
static com.vaadin.ui.Button	createButton(String buttonCaption, String iconName, com.vaadin.ui.Button.ClickListener clickListener)
static int	enableTabs(com.vaadin.ui.TabSheet tabSheet, ViewStateChangedEvent event, int oldSelectedTabPosition) This method enables or disables all tabs in a tabSheet.
static String	loadContentFromFile(Class<?> clazz, String resourceName) Loads the resourceName from the classpath using the given clazz.
static void	showValidationError(String errorMessage) Shows a validation error to the user.

Methods inherited from class java.lang.Object

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

Constructor Detail

UIHelper

public UIHelper()

Method Detail

createButton

public static com.vaadin.ui.Button createButton(String buttonCaption,
                                String iconName,
                                com.vaadin.ui.Button.ClickListener clickListener)

createButton

public static com.vaadin.ui.Button createButton(String buttonCaption,
                                String iconName)

enableTabs

public static int enableTabs(com.vaadin.ui.TabSheet tabSheet,
             ViewStateChangedEvent event,
             int oldSelectedTabPosition)

This method enables or disables all tabs in a tabSheet. Therefore the ViewStatechangedEvent is used. If the new view state is Edit the method returns the last selected tab position. If the new view state is not Edit the " oldSelectedTabPosition" is selected in the given tabSheet.

Parameters:

tabSheet - the tabsheet to enable or disable all tabs in

event -

oldSelectedTabPosition - which tab was selected before view state was Edit

Returns:

closeSilently

public static void closeSilently(Closeable closeable)

Closes the given Closeable silently. That means if an error during Closeable.close() occurs, the IOException is catched and logged. No further information is forwarded.

loadContentFromFile

public static String loadContentFromFile(Class<?> clazz,
                         String resourceName)

Loads the resourceName from the classpath using the given clazz. If the resource couldn't be loaded an empty string is returned.

Parameters:

clazz - The class to use for loading the resource.

resourceName - The name of the resource to be loaded (e.g. /folder/filename.txt)

Returns:

The content of the file, each line separated by line.separator or empty string if the resource does not exist.

showValidationError

public static void showValidationError(String errorMessage)

Shows a validation error to the user.

Parameters:

errorMessage - the error message.