This is an update to the previous post about exporting new translations to a TMX.
The script doesn’t have a GUI to select date and time or to specify whether it should work globally or on selected files. This update still doesn’t have that GUI, but provides for an external program to fill that gap. In this post I’m sharing the updated groovy script and a simple bash+zenity wizard-like script for Linux that acquires necessary data.
If no such external program/script exists, the groovy script continues to work as before without any extra fuss.

• write_new_trans2TMX_extGUI.groovy

  /*
   * Purpose:	 Export new translations completed after the specified 
   * 	 date (line 21) either for the entire project or for the
   * 	 selected files ("select_files" must be set to 'yes' — line 27)
   * 	 to TMX file
   * #Files:	 Writes 'translated_after_<date_time>.tmx'
   * 	 in the current project's root
   * #File format:	 TMX v.1.4
   * #Details:	http:/ /wp.me / p3fHEs-6z
   *
   * @author  Kos Ivantsov
   * @date    2013-08-12
   * @version 0.3
   */
  
  /*
   * The date should be specified as "year-month-day HOURS:minutes"
   * If not specified or specified wrongly, the script will look for
   * translations that are newer than one day. 
   */ 
  def newdate = ''
  /*
   * Set "select_files" to 'yes' if you want to use file selector
   * to specify files for export. If anything else is specified, the script
   * will work with the complete project.
   */ 
  select_files = ''
  
  import javax.swing.JFileChooser
  import org.omegat.util.StaticUtils
  import org.omegat.util.TMXReader
  import static javax.swing.JOptionPane.*
  import static org.omegat.util.Platform.*
  def prop = project.projectProperties
  
  if (!prop) {
  	final def title = 'Export new translation'
  	final def msg   = 'Please try again after you open a project.'
  	showMessageDialog null, msg, title, INFORMATION_MESSAGE
  	return
  }
  
  /*
   * If you want to use an external date and time selector and a window to
   * ask whether you want to select individual files, specify the whole path
   * to that program/script. It should print out date in the proper format
   * on the first line of the stout, and "yes" or anything else on the second
   * line. 
   */
  def command = "/home/user/.omegat/script/new2tmx_tweak"
  try {
  	proc = command.execute()
  	proc.waitFor()
  	//console.println "${proc.in.text}"
  	def lines = "${proc.in.text}".readLines()
  	newdate = lines[0]
  	select_files = lines[1]
  	}
  catch(java.io.IOException ex){
  if (ex.getMessage() =~ 'error=13'){
  	console.println "The program is not executable"
  	}
  if (ex.getMessage() =~ 'error=2'){
  	console.println "The program is not found"
  	}
  }
  
  try {
  	newdate = new Date().parse("yyyy-MM-dd HH:mm", newdate)
  	}
  	catch (java.text.ParseException e) {
  		newdate = new Date().minus(1)
  		final def title = 'Wrong date format'
  		final def msg   = """\
  The date has been specified in a wrong format.
  The script will work with entries exactly one day old,
  i.e. changed after $newdate\
  """
  		console.println msg
  		showMessageDialog null, msg, title, INFORMATION_MESSAGE
  		}
  
  namedate = new Date().parse("E MMM dd H:m:s z yyyy", newdate.toString()).format("MMM-dd-yyyy_HH.mm")
  
  def fileloc = prop.projectRoot+'translated_after_'+namedate+"${ (select_files == 'yes') ? "_select" : ''}"+'.tmx'
  exportfile = new File(fileloc)
  
  if (prop.isSentenceSegmentingEnabled())
  	segmenting = TMXReader.SEG_SENTENCE
  	else
  	segmenting = TMXReader.SEG_PARAGRAPH
  
  def sourceLocale = prop.getSourceLanguage().toString()
  def targetLocale = prop.getTargetLanguage().toString()
  
  exportfile.write("", 'UTF-8')
  exportfile.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n", 'UTF-8')
  exportfile.append("<!DOCTYPE tmx SYSTEM \"tmx11.dtd\">\n", 'UTF-8')
  exportfile.append("<tmx version=\"1.4\">\n", 'UTF-8')
  exportfile.append(" <header\n", 'UTF-8')
  exportfile.append("  creationtool=\"OmegaTScripting\"\n", 'UTF-8')
  exportfile.append("  segtype=\"" + segmenting + "\"\n", 'UTF-8')
  exportfile.append("  o-tmf=\"OmegaT TMX\"\n", 'UTF-8')
  exportfile.append("  adminlang=\"EN-US\"\n", 'UTF-8')
  exportfile.append("  srclang=\"" + sourceLocale + "\"\n", 'UTF-8')
  exportfile.append("  datatype=\"plaintext\"\n", 'UTF-8')
  exportfile.append(" >\n", 'UTF-8')
  
  def hitcount = 0
  
  if ((select_files == 'yes')) {
  	srcroot = new File(prop.getSourceRoot())
  	sourceroot = prop.getSourceRoot().toString() as String
  	JFileChooser fc = new JFileChooser(
  	currentDirectory: srcroot,
  	dialogTitle: "Choose files to export",
  	fileSelectionMode: JFileChooser.FILES_ONLY, 
  	//the file filter must show also directories, in order to be able to look into them
  	multiSelectionEnabled: true)
  
  	if(fc.showOpenDialog() != JFileChooser.APPROVE_OPTION) {
  	console.println "Canceled"
  	return
  	}
  
  	if (!(fc.selectedFiles =~ sourceroot.replaceAll(/\\+/, '\\\\\\\\'))) {
  		console.println "Selection outside of ${prop.getSourceRoot()} folder"
  		final def title = 'Wrong file(s) selected'
  		final def msg   = "Files must be in ${prop.getSourceRoot()} folder."
  		showMessageDialog null, msg, title, INFORMATION_MESSAGE
  		return
  	}
  
  	fc.selectedFiles.each {
  		fl = "${it.toString()}" - "$sourceroot"
  		exportfile.append("  <prop type=\"Filename\">" + fl + "</prop>\n", 'UTF-8')
  	}
  	exportfile.append(" </header>\n", 'UTF-8')
  	exportfile.append("  <body>\n", 'UTF-8')
  
  	fc.selectedFiles.each{
  		fl = "${it.toString()}" - "$sourceroot" 
  		files = project.projectFiles
  		files.each{
  			if ( "${it.filePath}" != "$fl" ) {
  			println "Skipping to the next file"
  			}else{
  		it.entries.each {
  		def info = project.getTranslationInfo(it)
  		def changeId = info.changer
  		def changeDate = info.changeDate
  		def creationId = info.creator
  		def creationDate = info.creationDate
  		def alt = 'unknown'
  		if (info.isTranslated()) {
  			if (newdate.before(new Date(changeDate))){
  				hitcount++
  				source = StaticUtils.makeValidXML(it.srcText)
  				target = StaticUtils.makeValidXML(info.translation)
  				exportfile.append("    <tu>\n", 'UTF-8')
  				exportfile.append("      <tuv xml:lang=\"" + sourceLocale + "\">\n", 'UTF-8')
  				exportfile.append("        <seg>" + "$source" + "</seg>\n", 'UTF-8')
  				exportfile.append("      </tuv>\n", 'UTF-8')
  				exportfile.append("      <tuv xml:lang=\"" + targetLocale + "\"", 'UTF-8')
  				exportfile.append(" changeid=\"${changeId ?: alt }\"", 'UTF-8')
  				exportfile.append(" changedate=\"${ changeDate > 0 ? new Date(changeDate).format("yyyyMMdd'T'HHmmss'Z'") : alt }\"", 'UTF-8')
  				exportfile.append(" creationid=\"${creationId ?: alt }\"", 'UTF-8')
  				exportfile.append(" creationdate=\"${ creationDate > 0 ? new Date(creationDate).format("yyyyMMdd'T'HHmmss'Z'") : alt }\"", 'UTF-8')
  				exportfile.append(">\n", 'UTF-8')
  				exportfile.append("        <seg>" + "$target" + "</seg>\n", 'UTF-8')
  				exportfile.append("      </tuv>\n", 'UTF-8')
  				exportfile.append("    </tu>\n", 'UTF-8')
  						}
  					}
  				}
  			}
  		}
  	}
  } else {
  	exportfile.append(" </header>\n", 'UTF-8')
  	exportfile.append("  <body>\n", 'UTF-8')
  	files = project.projectFiles
  		files.each {
  			it.entries.each {
  			def info = project.getTranslationInfo(it)
  			def changeId = info.changer
  			def changeDate = info.changeDate
  			def creationId = info.creator
  			def creationDate = info.creationDate
  			def alt = 'unknown'
  			if (info.isTranslated()) {
  				if (newdate.before(new Date(changeDate))){
  				hitcount++
  				source = StaticUtils.makeValidXML(it.srcText)
  				target = StaticUtils.makeValidXML(info.translation)
  				exportfile.append("    <tu>\n", 'UTF-8')
  				exportfile.append("      <tuv xml:lang=\"" + sourceLocale + "\">\n", 'UTF-8')
  				exportfile.append("        <seg>" + "$source" + "</seg>\n", 'UTF-8')
  				exportfile.append("      </tuv>\n", 'UTF-8')
  				exportfile.append("      <tuv xml:lang=\"" + targetLocale + "\"", 'UTF-8')
  				exportfile.append(" changeid=\"${changeId ?: alt }\"", 'UTF-8')
  				exportfile.append(" changedate=\"${ changeDate > 0 ? new Date(changeDate).format("yyyyMMdd'T'HHmmss'Z'") : alt }\"", 'UTF-8')
  				exportfile.append(" creationid=\"${creationId ?: alt }\"", 'UTF-8')
  				exportfile.append(" creationdate=\"${ creationDate > 0 ? new Date(creationDate).format("yyyyMMdd'T'HHmmss'Z'") : alt }\"", 'UTF-8')
  				exportfile.append(">\n", 'UTF-8')
  				exportfile.append("        <seg>" + "$target" + "</seg>\n", 'UTF-8')
  				exportfile.append("      </tuv>\n", 'UTF-8')
  				exportfile.append("    </tu>\n", 'UTF-8')
  					}
  				}
  			}
  		}
  }
  
  exportfile.append("  </body>\n", 'UTF-8')
  exportfile.append("</tmx>", 'UTF-8')
  
  final def title = 'TMX file written'
  final def msg   = "$hitcount TU's written to " + exportfile.toString()
  console.println msg
  showMessageDialog null, msg, title, INFORMATION_MESSAGE
  return
  

  The only difference compared to the previous version is lines 43-66. The external program is specified in line 50.

• new2tmx_tweak

  #!/bin/bash
  DATE=$(zenity --calendar \
  --title "Select date" \
  --text="TU's newer than the selected date will be used for export" \
  --date-format=%F)
  
  HRS=({00..24})
  MINS=({00..59})
  
  HRS=$(zenity --entry --title "Select time" \
  --text="Hours" \
  --entry-text="${HRS[@]}" )
  
  MINS=$(zenity --entry --title "Select time" \
  --text="Minutes" \
  --entry-text="${MINS[@]}" )
  
  zenity --question --title="Select Files" \
  --text="Do you want to select individual files for export?"
  if [ $? == "0" ]; then 
  FILESEL='yes'
  else
  FILESEL='no'
  fi
  
  echo "$DATE $HRS:$MINS"
  echo $FILESEL
  

  This script should be saved somewhere (in this example it’s /home/user/.omegat/script/new2tmx_tweak) and made executable (chmod +x /home/user/.omegat/script/new2tmx_tweak). Zenity should be installed for it to work. One can cook up a nicer GUI using other tools, of course, but this serves just as a quick example. I guess, similar can be done using AutoIt or AutoHotKey on MS Windows or AppleScript on OSX.
  If you happen to come up with your own date and time picker for this, feel free to share in comments or link to your solution.

But as of now,

Good luck!