mainform.cpp

jvcl driver development envionment

/******************************************************************

                       JEDI-VCL Demo

 Copyright (C) 2004 Project JEDI

 Original author: Olivier Sannier (obones att altern dott org)

 You may retrieve the latest version of this file at the JEDI-JVCL
 home page, located at http://jvcl.sourceforge.net

 The contents of this file are used with permission, subject to
 the Mozilla Public License Version 1.1 (the "License"); you may
 not use this file except in compliance with the License. You may
 obtain a copy of the License at
 http://www.mozilla.org/MPL/MPL-1_1Final.html

 Software distributed under the License is distributed on an
 "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 implied. See the License for the specific language governing
 rights and limitations under the License.

******************************************************************/
//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "MainForm.h"
#include <Math.hpp>
#include <Math.h>
//#include <JvJVCLAboutForm.hpp>
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma link "JvChart"
#pragma link "JvComponent"
#pragma link "JvExControls"
#pragma link "Math"
//#pragma link "JvJVCLAboutForm"
#pragma resource "*.dfm"
TfrmMain *frmMain;

#if __BORLANDC__ < 0x560 
static const Extended NaN = 0.0 / 0.0;
#endif

//---------------------------------------------------------------------------
__fastcall TfrmMain::TfrmMain(TComponent* Owner)
  : TForm(Owner), FStatHgt(10), FStatHg0(10)
{
}

//---------------------------------------------------------------------------
void TfrmMain::_Generate()
{
  randomize();
  FHgt = abs(random(80)+(random(((FGenerationIndex / Foo) % Foo1) * 250) * 5 + 9500));
  FHg0 = abs(random(280)+random(((FGenerationIndex / Foo) % Foo2) * 650)*5 + 1003);
  FGenerationIndex++;
}

/* Bogus random spiky-looking function to simulate a QA value,
  which hovers within +/- 10% of perfect (100%), but
  with relatively infrequent spiky errors */
int TfrmMain::_QAProblemScatter()
{
  double n,m;

  randomize();
  n = Log10(random(10000)+1);  // Random is my favourite function. How about you? -WP
  n = n * Log10(random(10000)+1);
  m = Log10(random(10000)+1);
  m = m * Log10(random(10000)+1);
  n = abs(100 + n - m);
  if (n<0)
    n = 0;
  if (n>150)
    n = 150;

  return floor(n+0.5);
}

void TfrmMain::_StoreValue(int I)
{
    FStatHgt.AddValue(FHgt);
    FStatHg0.AddValue(FHg0);


    // PAY ATTENTION HERE, this is where we set the Chart.Data.Value[ index,pen] = <values>
    // stuff which is the MOST IMPORTANT THING, unless you like blank charts:

    // Set Data.Value[Pen, Series] = dataValue ...
    Chart->Data->Value[0][I] = FStatHgt.Average() / 1000;

    // Test blanks on big chart, show missing data:
     Chart->Data->Value[1][I] = FStatHg0.Average()/1000;

    FHg2p = ( FStatHgt.Average() - FStatHg0.Average())/1000;
    if (FHg2p < 0.0)
        FHg2p = 0.0;
    Chart->Data->Value[2][I] = FHg2p;

    Fds = Fdt + (FGenerationIndex / 576);

    // There are TWO ways to get an X Axis label plotted:
    if (DateTimeAxisMode->Checked)
         Chart->Data->Timestamp[I] = Fds; // X legends generated by timestamps
    else
        // X Legends generated by user are used by default.
        // This would be redundant, and would be a waste of memory
        // if (Chart.Options.XAxisDateTimeMode was also set.
        Chart->Options->XLegends->Add(FormatDateTime("hh:nn:ss", Fds) );

   if (MenuSecondaryAxisMode->Checked)
   {
      if (I == 1)
         Chart->Data->Value[3][I] = 100;
      else if ((I % 4) == 3)
      {
        //Chart->Data->Value[3][I] =  1+ ((I % 12) * 10) // stairstep
        //random:
        Chart->Data->Value[3][I] = _QAProblemScatter();
      }
      else
         Chart->Data->Value[3][I] = NaN; // leave some blanks.
   }
}

void TfrmMain::NewValues()
{
  int nValueCount;

  ListBox1->Clear();
  Chart->Data->Clear();


  randomize();

   Chart->Options->XAxisDateTimeMode = DateTimeAxisMode->Checked;  // Use datetime timestamp labels, just Fer Instance->

   if ( !Chart->Options->XAxisDateTimeMode)
        Chart->Options->XAxisLegendSkipBy = 5;



  if (LargeDataset576samples1->Checked )
  {
     // A larger bogus data set for demonstration purposes->
     nValueCount = 576;  // 2->5 minute sample period, 576 samples == 1 day->
     Foo = 5; // Used in generating our bogus data below, not really important->
     Chart->Options->XAxisValuesPerDivision = 24; // 24 samples * 150 seconds == 1 hour time divisions (     Chart->Options->XAxisValuesPerDivision = 4;
  }
  else
  {
     // A smaller bogus data set for demonstration purposes->
     nValueCount = 24; // 2->5 minute sample period, 24 samples =1 hour->
     Foo = 1;  // Used in generating our bogus data below, not really important->
     Chart->Options->XAxisValuesPerDivision = 4; // five divisions, 4 values per division
  }

  //Chart->ResetGraphModule;    // Clears YMax->
  Fdt = floor(Now()- 1.0); // yesterday, midnight->
  Foo1 = random(5)+2;   // more randomness
  Foo2 = random(3)+5;   // more randomness
  FGenerationIndex = 1;
  for (int i = 0; i < nValueCount; i++)
  {
    if (i > 0)
    {  // generate random data that appears to show a sawtooth-frequency-pattern plus a lot of random noise:
      _Generate();
    }
    else
    {
      FHgt = 7000; // First sample always known value, helps me troubleshoot->
      FHg0 = 1000;
    }

    _StoreValue(i);
    

    // Override stored value in special cases:
    
    // How to make a gap in the data!
    if ((nValueCount>100 ) && ShowgapinLineChart1->Checked)
    {
      if ((i > 100) && (i < 130))
      {
         Chart->Data->Value[0][i] = NaN; // Use special Math->NaN const
         Chart->Data->Value[1][i] = NaN; // Use special Math->NaN const
         Chart->Data->Value[2][i] = NaN; // Use special Math->NaN const
      }
    }

    // Just so that the last two values are visibly different, to make sure
    // the chart handles the final vaulues correctly, we set all the final
    // values to known amounts also:
    if ((i==nValueCount-2))
    {
         Chart->Data->Value[0][i] = 6.0; // Use special Math->NaN const
         Chart->Data->Value[1][i] = 4.0; // Use special Math->NaN const
         Chart->Data->Value[2][i] = 2.0; // Use special Math->NaN const
    }
    else if ((i==nValueCount-1))
    {
         Chart->Data->Value[0][i] = 3.0; // Use special Math->NaN const
         Chart->Data->Value[1][i] = 2.0; // Use special Math->NaN const
         Chart->Data->Value[2][i] = 1.0; // Use special Math->NaN const

    }

    ListBox1->Items->Append( Chart->Data->DebugStr(i) );
  }



//  with Chart->Options do
  {
    Chart->Options->Title = "Chart Title";
    Chart->Options->XAxisHeader = "Date/Time";
    Chart->Options->YAxisHeader = "Readings (ng/m3)";

    // Try out the pen styles:
      if (Chart->Options->ChartKind == ckChartStackedBar)
         Chart->Options->PenStyle[0] = psClear; // THIS IS HOW YOU TEMPORARILY HIDE ONE PEN!
      else
         Chart->Options->PenStyle[0] = psSolid;
    Chart->Options->PenStyle[1] = psDash;
    Chart->Options->PenStyle[2] = psDot;

    if (MenuSecondaryAxisMode->Checked) {
        Chart->Options->PenCount = 4; // Add a pen for right side demo->
        Chart->Options->SecondaryYAxis->YMax = 140; // Example shows Q/A percentage-> Experimental results
                                    // results are compared to expected results, and the
                                    // response percentage, is plotted from 0% to 140%
                                    // of expected value->
        Chart->Options->SecondaryYAxis->YMin = 0;
        Chart->Options->SecondaryYAxis->YLegendDecimalPlaces = 2;
        Chart->Options->PenSecondaryAxisFlag[3] = True; // Move pen index 3 (Fourth pen) to secondary axis->
        Chart->Options->PenMarkerKind[3] = pmkDiamond;
        Chart->Options->PenValueLabels[3] = true; // Label with text->
        Chart->Options->PenStyle[3]      = psClear; // Markers only, no lines->
        Chart->Options->PenColor[3]      = clGray;
        Chart->Options->MarkerSize       = 5; // Make "em bigger->
    }