Modal model or dialog box to determine the choice of options

Hmm I noticed that I can also use tripple quotes instead slashes on everyline which is more comfortable. Example:

windowResource = """dialog { 
    orientation: 'column',
    alignChildren: ['fill', 'top'], 
    preferredSize:[300, 130],
    text: ' Split text layers', 
    margins:15,
   
    sliderPanel: Panel {
        orientation: 'row',
        alignChildren: 'right',
        margins:15,
        text: ' Split by characters ',
        st: StaticText { text: 'Split by:' },
        te: EditText { text: '',  justify: 'left'}
        }
   
    specialPanel: Panel {
        orientation: 'row',
        alignChildren: 'right',
        margins:15,
        text: ' Special split ',
        chLetter: Checkbox { text: 'Each letter'}
        chParagraphStyles: Checkbox { text: 'Paragraph styles'}
        chCharacterStyles: Checkbox { text: 'Character styles'}
        chTab: Checkbox { text: 'Tab'}
        chLineEnd: Checkbox { text: 'Line end'}
        chLineBreak: Checkbox { text: 'Line break'}
        }
   
    bottomGroup: Group{
        chRemoveOriginal: Checkbox { text: 'Remove original layer'}
        cancelButton: Button { text: 'Cancel', properties:{name:'cancel'}, size: [120,24], alignment:['right', 'center'] },
        applyButton: Button { text: 'Do magic!', properties:{name:'ok'}, size: [120,24], alignment:['right', 'center'] },
    }
}"""

Here is my UI code I am working on:

windowResource = "dialog {  \
    orientation: 'column', \
    alignChildren: ['fill', 'top'],  \
    preferredSize:[300, 130], \
    text: ' Split text layers',  \
    margins:15, \
    \
    sliderPanel: Panel { \
        orientation: 'row', \
        alignChildren: 'right', \
        margins:15, \
        text: ' Split by characters ', \
        st: StaticText { text: 'Split by:' }, \
        te: EditText { text: '',  justify: 'left'} \
        } \
    \
    specialPanel: Panel { \
        orientation: 'row', \
        alignChildren: 'right', \
        margins:15, \
        text: ' Special split ', \
        chLetter: Checkbox { text: 'Each letter'} \
        chParagraphStyles: Checkbox { text: 'Paragraph styles'} \
        chCharacterStyles: Checkbox { text: 'Character styles'} \
        chTab: Checkbox { text: 'Tab'} \
        chLineEnd: Checkbox { text: 'Line end'} \
        chLineBreak: Checkbox { text: 'Line break'} \
        } \
    \
    bottomGroup: Group{ \
        chRemoveOriginal: Checkbox { text: 'Remove original layer'} \
        cancelButton: Button { text: 'Cancel', properties:{name:'cancel'}, size: [120,24], alignment:['right', 'center'] }, \
        applyButton: Button { text: 'Do magic!', properties:{name:'ok'}, size: [120,24], alignment:['right', 'center'] }, \
    }\
}"
// define new window 
win = new Window(windowResource);
//add combobox dynamicaly
var dropdownSplitingCharactersOptions = win.sliderPanel.add('dropdownlist',undefined,["remove character","left side","right side"]);
// set default options
dropdownSplitingCharactersOptions.selection=1;
win.show();
win.bottomGroup.cancelButton.onClick = function() {
  return win.close();
};
win.bottomGroup.applyButton.onClick = function() {
  
 /* var splitBy = escapeRegExp(win.sliderPanel.te.text);
  if (win.specialPanel.chLineBreak.value==true){
      splitBy+="\r";
  }
  if(win.specialPanel.chLineEnd.value==true){
      splitBy += String.fromCharCode(03);
  }
  if (win.specialPanel.chTab.value==true){
      splitBy+="\t";
  }
  if (win.specialPanel.chLetter.value==true){
      splitByEveryLetter=true;
  }
  if (win.bottomGroup.chRemoveOriginal.value==true){
      removeOriginalLayer=true;
  }
  // read dynamic added options
  if (dropdownSplitingCharactersOptions.selection==0){
      removeSplitChar=true;
  }
  if (dropdownSplitingCharactersOptions.selection==1){
      splitCharOnLeftSide=true;
  }
  paragraphSplit = win.specialPanel.chParagraphStyles.value;
  characterSplit = win.specialPanel.chCharacterStyles.value;
  
  var settingsToRemember = {};
  settingsToRemember.splitBy=splitBy;
  app.putCustomOptions ("Split", settingsToRemember, true);*/
  win.close();
  /*doJob(splitBy);
  
  smartQuotes (qoutesSettings);*/
};

I commented code in onClick method because there are not functions and variables so you can run it. But it is for example and there is work in progress. I store settings in global variables.

Also Object Model Viewer in ExtendScript toolkit could be handy: http://sklad.bereza.cz/00-jarda/00_screenshot/2016-08-28_233814.jpg  Menu > Help > Object Model Viewer