어제 올렸는데 머리가 멍청하니까 또 올리게 됩니다.
지송....
차트에서 그래프를 그리고 난후 막대선을 그릴려고 합니다.
막대선은 그릴줄 알겠는데
버튼을 누르면 막대가 움직이는 걸 만들고 싶습니다.
해당 씨리지에 날짜와 값이 들어가는데.....
특정 날짜에 해당하는 Y좌표를 구할수 있나요?
그 Y좌표를 구하면 막대선은 그냥 그릴수 있는데...
Y좌표를 구할수가 없네요..
일단 임의로....막대선은 그렸습니다.
해당 날짜에 해당하는 Y좌표를 구하는 방법 좀 가르쳐주세요
그리고 chart -> Series [ Index ] -> AddY ( 값, "", clTeeColor ) ;
       chart -> Series [ Index ] -> XLabel [ count++ ] = dateHour ;
이렇게 값을 넣었는데....
이 값에다가 NULL값을 넣을수 있나요? 궁금합니다.

어제 답변주신 이종빈님 감사드립니다. ^^ 꾸벅

void __fastcall
TformStatRelativeConcGraph::chartBeforeDrawSeries
    ( TObject * Sender )
    {

    int partial, XPosition;
    double tmpXCenterValue;

    tmpXCenterValue = chart -> Series [ 0 ] -> YValues -> MinValue +
                      50 *( chart -> Series [ 0 ] -> YValues -> MaxValue -
                      chart -> Series [ 0 ] -> YValues -> MinValue ) / 100.0 ;

    XPosition = chart -> LeftAxis -> CalcYPosValue ( tmpXCenterValue ) ;

    chart -> Canvas -> Pen -> Width = 3 ;
    chart -> Canvas -> Pen -> Style = psSolid ;
    chart -> Canvas -> Pen -> Color = clRed ;
    chart -> Canvas -> MoveTo ( XPosition, chart -> ChartRect.Bottom ) ;
    chart -> Canvas -> LineTo ( XPosition + chart -> Height3D, chart -> ChartRect.Bottom - chart -> Width3D ) ;
    chart -> Canvas -> LineTo ( XPosition + chart -> Height3D, chart -> ChartRect.Top - chart -> Width3D ) ;

    }
//---------------------------------------------------------------------------

void __fastcall
TformStatRelativeConcGraph::chartAfterDraw
    ( TObject * Sender )
    {

    int    XPosition;
    double tmpXCenterValue;
    // first calculate the middle vertical value (based on LineSeries points)
    tmpXCenterValue = chart -> Series [ 0 ] -> YValues -> MinValue +
                      50 *( chart -> Series [ 0 ] -> YValues -> MaxValue -
                      chart -> Series [ 0 ] -> YValues -> MinValue ) / 100.0 ;

    // change pen and draw the line
    chart -> Canvas -> Pen -> Width = 3 ;
    chart -> Canvas -> Pen -> Style = psSolid ;
    chart -> Canvas -> Pen -> Color = clRed ;
    chart -> Canvas -> MoveTo ( XPosition, chart -> ChartRect.Bottom ) ;
    chart -> Canvas -> LineTo ( XPosition, chart -> ChartRect.Top ) ;
    chart -> Canvas -> LineTo ( XPosition + chart -> Width3D, chart -> ChartRect.Top - chart -> Height3D ) ;
    }