module ChqEntry;
import dwt.DWT;
import dwt.widgets.Text;
import dwt.widgets.Shell;
import dwt.widgets.Display;
import dwt.layout.GridLayout;
import dwt.events.ModifyEvent;
import dwt.events.VerifyEvent;
import dwt.events.ModifyListener;
import dwt.events.VerifyListener;
import tango.io.Stdout;
import dwt.dwthelper.Integer;
import TextUtil = tango.text.Util;
import    Float = tango.text.convert.Float;
import tango.io.File;
import tango.io.stream.TextFileStream;
import dwt.graphics.Color;
import tango.text.stream.LineIterator;
import tango.util.Convert;
import Line;

debug   //note compile with -debug switch on
{
     alias Stdout  dbg;
}

void main () {
  Display display = new Display ();
  Shell shell = new Shell (display);
  shell.setBackground(new Color(display,141,255,238));
  shell.setText("Cheque Entry Page");
  auto gridLayout = new GridLayout();
  gridLayout.numColumns = 1;
  shell.setLayout(gridLayout);
  char[][] fields ;
  char[][][] fcopy  ;  
  double balance = 0;
  //load screen from file
  foreach (line; new LineIterator!(char) (new FileConduit ("data.csv"))){
     Line myline = new Line (shell, DWT.LEFT);
     //myline.setBackground(new Color(Line,31,133,31));
     fields = TextUtil.delimit(line,",");
     myline.setText(0,fields[0]);
     myline.setText(1,fields[1]);
     myline.setText(2,fields[2]);
     myline.setText(3,fields[3]);
     myline.setText(4,fields[4]);
     auto debit  = Float.parse(fields[5]);
     auto credit = Float.parse(fields[6]);
     balance = balance - debit + credit;
     if (fields[5]!="0.00")myline.setText (5,fields[5]);    //column 5
     if (fields[6]!="0.00")myline.setText (6,fields[6]);    //column 6
      myline.setText (7, to!(char[]) (balance) );
      fcopy~=fields;
    }

  //add a new line
//void addline(){

  Line newline = new Line (shell, DWT.LEFT);
  int rowNo = to!(int)(fields[0]) +1;
  newline.setText(0 , to!(char[]) (rowNo));
  newline.setText(3 , "work out how to edit this line now");
  dbg(fcopy[7]).newline;
  //dbg(newline.getTabList()).newline;
  newline.setFocus(5);


/*  
newline.addModifyListener(new class ModifyListener {
      public void modifyText(ModifyEvent e) {
            Stdout.print("Modified at " ~ to!(char) (e.time));
            editline(); 
            writeline();
      }
});
  newline.addVerifyListener(new class VerifyListener {
      public void verifyText(VerifyEvent e) {
            if (e.text=="*") {
                  Stdout.print("Cannot type *");
                  e.doit = false;
            }
      }
}); 
if (hasFocus(7))
  return;

}  
//edit the new line
void editline(){ 
    newline.getText(0,fields[0]);
    fields[0] ~=",";
    newline.getText(1,fields[1]);
    fields[1] ~=",";
    newline.getText(2,fields[2]);
    fields[2] ~=",";
    newline.getText(3,fields[3]);
    fields[3] ~=",";
    newline.getText(4,fields[4]);
    fields[4] ~=",";
     auto debit  = Float.parse(fields[5]);
     auto credit = Float.parse(fields[6]);
     balance = balance - debit + credit;
     
    if (fields[5]!="0.00")newline.getText (5,fields[5]);    //column 5
    fields[5] ~=",";
    if (fields[6]!="0.00")newline.getText (6,fields[6]);    //column 6
    fields[6] ~=",";
      newline.setText (7, to!(char[]) (balance) );
      fcopy~=fields;
  
     auto  bytesWritten = newline;
}

        
void writeline(){ 
  // open file for writing
auto to = new FileConduit ("data.csv", FileConduit.WriteCreate);

//save the new line to csv file 
 bytesWritten = to.output.write (fields);


  

}

//edit old lines 


*/

  shell.pack();
  shell.open();
  while (!shell.isDisposed ()) {
    if (!display.readAndDispatch ()) display.sleep ();
  }
  display.dispose ();
}