【实例简介】读股票数据画K线图很不错的Delphi源码

【实例截图】

【核心代码】procedure TfrmMain2.DrawScaleK(C: TCanvas; R: TRect);

var

High, Low, D: Single;

HIndex, LIndex: TArrayOfInteger;

HA, LA: TArrayOfSingle;

begin

if FindKLineScaleHighLow(StkDataFile,High,Low,HA,LA,HIndex,LIndex) then

begin

ScaleHigh[1] := High;

ScaleLow[1] := Low;

D := (High-Low) / 20;

High:= High D;

Low := Low -D;

InflateRect(R,0,-2);

DRAW_SCALE(C,R,ScaleLow[1],ScaleHigh[1],Low,High,_height_(R) div 25, True);

end;

end;

procedure TfrmMain2.DrawV(C: TCanvas; R: TRect);

var

D, High, Low: Single;

I, J, X1, X2, Y1, Y2: Integer;

P: PStkDataRec;

begin

if FindVLineScaleHighLow(StkDataFile,High,Low) then

begin

ScaleHigh[2] := High;

ScaleLow[2] := Low;

D := (High-Low) / 10;

High:= High D;

InflateRect(R,0,-2);

if ShowBackgroundDotLine then DRAW_HORZ_SCALE(C,R,ScaleLow[2],ScaleHigh[2],Low,High,_height_(R) div 25, True);

_setPen_(C,GRID.Color,1,psSolid,pmCopy);

_setBrush_(C,GRID.Color,bsSolid);

for I := 0 to DataPerPage-1 do

begin

J := PageStart DataPerPage - I - 1;

P := StkDataFile.getData(J);

if P <> nil then

begin

if P^.CP > P^.OP then C.Pen.Color := clRed

else     if P^.CP < P^.OP then C.Pen.Color := clAqua

else                                                 C.Pen.Color := clLime;

C.Brush.Color := C.Pen.Color;

X1 := 1 UnitWidth * I;

X2 := UnitWidth * (I 1);

Y1 := R.Bottom;

Y2 := Fy2Iy(P^.VOL,R,High,Low);

if UnitWidth > 2 then C.Rectangle(Rect(X1,Y1,X2,Y2))

else                             _line_(C,X1,Y1,X1,Y2);

end;

end;

if IS_DRAW_MA then

for I := 0 to Length(VMAC)-1 do

if VMAC[I] > 0 then

DrawLine(VMA[I], DEF_COLOR[I], C, R, High, Low);

end;

end;

procedure TfrmMain2.DrawRSI(C: TCanvas; R: TRect);

var

High, Low: Single;

I, Y: Integer;

begin

High := 100;

Low := 0;

ScaleHigh[3] := 100;

ScaleLow[3] := 0;

InflateRect(R,0,-2);

_setBrush_(C,GRID.Color,bsSolid);

if ShowBackgroundDotLine then

begin

_setPen_(C,clRed,1,psDot,pmCopy);

Y := Fy2Iy(80,R,High,Low);    _line_(C,R.Left 1,Y,R.Right,Y,clRed);

Y := Fy2Iy(50,R,High,Low);  _line_(C,R.Left 1,Y,R.Right,Y,clSilver);

Y := Fy2Iy(20,R,High,Low);  _line_(C,R.Left 1,Y,R.Right,Y,clAqua);

end;

_setPen_(C,clRed,1,psSolid,pmCopy);

for I := 0 to Length(RSIC)-1 do

if RSIC[I] > 0 then

DrawLine(RSI[I], DEF_COLOR[I], C, R, High, Low);

end;