Groovy Swing buider fileChooser

Question

I am trying to use groovy swing builder's fileChooser with no luck. When I copy the following example from groovy website:

def openExcelDialog  = SwingBuilder.fileChooser(dialogTitle:"Choose an excel file", 
                               id:"openExcelDialog", fileSelectionMode :         JFileChooser.FILES_ONLY, 
                               //the file filter must show also directories, in order to be able to look into them
                               fileFilter: [getDescription: {-> "*.xls"}, accept:{file-> file ==~ /.*?\.xls/ || file.isDirectory() }] as FileFilter) {

}

But I got an error message:

groovy.lang.MissingMethodException: No signature of method: static groovy.swing.SwingBuilder.fileChooser() is applicable for argument types: (java.util.LinkedHashMap, ConsoleScript19$_run_closure1) values

score 6 · Accepted Answer · answered Aug 18 '11 at 04:19

You can't use the fileChooser like that outside a SwingBuilder. Instead, you need to just use a normal, non-swingBuilder JFileChooser. Here's a complete working example:

import javax.swing.filechooser.FileFilter
import javax.swing.JFileChooser

def openExcelDialog = new JFileChooser(
                            dialogTitle: "Choose an excel file",
                            fileSelectionMode: JFileChooser.FILES_ONLY, 
                            //the file filter must show also directories, in order to be able to look into them
                            fileFilter: [getDescription: {-> "*.xls"}, accept:{file-> file ==~ /.*?\.xls/ || file.isDirectory() }] as FileFilter)

openExcelDialog.showOpenDialog()

Note that the new JFileChooser just ends with the closing parentheses - there's no trailing closure.

score 3 · Answer 2 · answered Dec 18 '11 at 18:24

OverZealous' solution fails with NPE.

Exception in thread "Basic L&F File Loading Thread" java.lang.NullPointerException
    at java.util.regex.Matcher.getTextLength(Unknown Source)
    at java.util.regex.Matcher.reset(Unknown Source)
    at java.util.regex.Matcher.<init>(Unknown Source)
    at java.util.regex.Pattern.matcher(Unknown Source)
    at org.codehaus.groovy.runtime.InvokerHelper.matchRegex(InvokerHelper.java:335)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.matchRegex(ScriptBytecodeAdapter.java:722)
    at ExcelChooser2$_run_closure2.doCall(ExcelChooser2.groovy:13)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:272)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:884)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:39)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
    at FileFilter_groovyProxy.accept(Script1.groovy:7)
    at javax.swing.JFileChooser.accept(Unknown Source)
    at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run0(Unknown Source)
    at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run(Unknown Source)

Solution:

OLD: fileFilter: [getDescription: {-> "*.xls"}, accept:{file -> file ==~ /.*?\.xls/ || file.isDirectory() }] as FileFilter

NEW: fileFilter: [getDescription: {-> "*.xls"}, accept:{file -> file.toString() ==~ /.*?\.xls/ || file.isDirectory() }] as FileFilter

[ Win7(x64) Groovy Version: 1.8.3 JVM: 1.6.0_29) ]

score 1 · Answer 3 · answered Aug 31 '15 at 21:17

I think you need to create a SwingBuilder object first. This worked for me:

def swing = new SwingBuilder()
def dialog = swing.fileChooser(dialogTitle: "Open A File")
if (dialog.showOpenDialog() == JFileChooser.APPROVE_OPTION) {
    println dialog.selectedFile
}

Look here for a complete list of properties.

Groovy Swing buider fileChooser

3 Answers3