unit StatCurveBig_F;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, ComCtrls, DB, ADODB;

type
  TRePaintType = (
    mNoPaint,       //未畫線
    mRePaint,       //重畫
    mPaintNext);    //畫新的線
  rPoint = record   //定義坐標上的點
    x,y,z:single;
  end;
  rLine=array[0..99] of rPoint;   //定義由100個點的連成的曲線
  TfrmStatCurveBig = class(TForm)
    Panel1: TPanel;
    GroupBox2: TGroupBox;
    Label1: TLabel;
    edt_X: TEdit;
    Label2: TLabel;
    edt_Y: TEdit;
    GroupBox1: TGroupBox;
    StatusBar1: TStatusBar;
    imgCanvas: TImage;
    pbCanvas: TPaintBox;
    btnClose: TButton;
    lab_X: TLabel;
    lab_Y: TLabel;
    lab_Z: TLabel;
    ADOConnection: TADOConnection;
    ADOQuery: TADOQuery;
    btnPrint: TButton;
    labCarLic: TLabel;
    labCarType: TLabel;
    labDriverLic: TLabel;
    labDateTime: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    procedure btnCloseClick(Sender: TObject);
    procedure OriginAndScale(Sender: TObject);      //確定坐標原點位置和刻度長度
    procedure EstablishXYWorld(imgCanvas: TImage);   //畫坐標系
    procedure XYWorldToScreen(x, y: single; var xx, yy: integer);   //把xy坐標轉換成屏幕坐標
    procedure pMoveTo(x, y: single; pbCanvas: TPaintBox);  //移動畫筆到(x,y)點
    procedure pLineTo(x, y: single; pbCanvas: TPaintBox);  //從當前點畫線到(x,y)點
    procedure pPolyline(rl: rLine; pbCanvas: TPaintBox);   //連接所有點
    procedure SetPaintBoxPosition(imgCanvas: TImage; pbCanvas: TPaintBox);
    procedure FormCreate(Sender: TObject);
    procedure pbCanvasPaint(Sender: TObject);
    procedure pbCanvasMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure DrawLine(Sender: TObject);
    procedure DrawSwitch(rl: rLine; pbCanvas: TPaintBox);
    procedure btnPrintClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmStatCurveBig: TfrmStatCurveBig;
  x_min,y_min,x_max,y_max:integer;       //在坐標系中的xy的最值相對于paintbox容器的實際位置
  x_scale,y_scale:integer;               //x和y軸1刻度的實際象素值
  px_min,py_min,px_max,py_max:integer;
  tmpLine: rLine;
  rePaintType:TRePaintType;
  old_x,old_y:integer;
  DotNum:integer;
implementation
uses
  StatCurveBig_IMP;
{$R *.dfm}

procedure TfrmStatCurveBig.btnCloseClick(Sender: TObject);
begin
  Close;
end;

procedure TfrmStatCurveBig.OriginAndScale(Sender: TObject);
begin
  x_min:=50;
  y_min:=imgCanvas.Height-30;
  x_max:=imgCanvas.Width-40;
  y_max:=15;
  x_scale:=trunc((x_max-x_min-60)/20);   //x軸1刻度的象素
  y_scale:=trunc((y_min-y_max-5)/180);   //y軸1刻度的象素
end;

procedure TfrmStatCurveBig.EstablishXYWorld(imgCanvas: TImage);
var
  i,j:integer;
begin
  imgCanvas.Canvas.Pen.Color:=clBlack; //黑色畫筆
  imgCanvas.Canvas.MoveTo(0,0);
  imgCanvas.Canvas.LineTo(imgCanvas.Width-1,0);
  imgCanvas.Canvas.LineTo(imgCanvas.Width-1,imgCanvas.Height-1);
  imgCanvas.Canvas.LineTo(0,imgCanvas.Height-1);
  imgCanvas.Canvas.LineTo(0,0);         //畫四周邊框
  imgCanvas.Canvas.MoveTo(x_min,y_min);
  imgCanvas.Canvas.LineTo(x_max,y_min);
  imgCanvas.Canvas.LineTo(x_max-7,y_min-7);
  imgCanvas.Canvas.MoveTo(x_max,y_min);
  imgCanvas.Canvas.LineTo(x_max-7,y_min+7);
  imgCanvas.Canvas.Font.Size:=8;
  //imgCanvas.Canvas.TextOut(x_max+10,y_min-8,'t(s)');    //畫x軸
  imgCanvas.Canvas.TextOut(x_max+10,y_min-8,'時間');    //畫x軸
  imgCanvas.Canvas.TextOut(x_max+10,y_min+6,'(s)');
  imgCanvas.Canvas.MoveTo(x_min,y_min);
  imgCanvas.Canvas.LineTo(x_min,y_max);
  imgCanvas.Canvas.LineTo(x_min,y_max+30);
  imgCanvas.Canvas.LineTo(x_min-7,y_max+9+30);
  imgCanvas.Canvas.MoveTo(x_min,y_max+30);
  imgCanvas.Canvas.LineTo(x_min+7,y_max+9+30);
  imgCanvas.Canvas.Font.Size:=8;
  //imgCanvas.Canvas.TextOut(x_min-25,y_max-20,'v(km/h)');      //畫y軸
  imgCanvas.Canvas.TextOut(x_min-40,y_max+25,'速度');      //畫y軸
  imgCanvas.Canvas.TextOut(x_min-40,y_max+40,'(km/h)');
  imgCanvas.Canvas.Font.Size:=8;
  imgCanvas.Canvas.TextOut(x_min-16,y_min+5,'0');      //坐標原點
  imgCanvas.Canvas.TextOut(x_min-40,y_max+5,'制動');
  i:=y_min;
  j:=0;
  while (i>y_max+20) and (j<180) do
  begin
    i:=i-10*y_scale;
    j:=j+10;
    imgCanvas.Canvas.MoveTo(x_min,i);
    imgCanvas.Canvas.LineTo(x_min+4,i);
    imgCanvas.Canvas.TextOut(x_min-22,i,intToStr(j));
  end;                                             //畫y軸刻度
  x_scale:=trunc((x_max-x_min-30)/20);   //x軸1刻度的象素
  i:=x_min;
  j:=0;
  while (i<x_max-50) and (j<20) do
  begin
    i:=i+x_scale;
    j:=j+1;
    imgCanvas.Canvas.MoveTo(i,y_min);
    imgCanvas.Canvas.LineTo(i,y_min-4);
    imgCanvas.Canvas.TextOut(i,y_min+5,intToStr(j));
  end;                                             //畫x軸刻度
end;

procedure TfrmStatCurveBig.XYWorldToScreen(x, y: single; var xx, yy: integer);
begin
  xx:=trunc(x*x_scale);
  yy:=trunc(py_min-y*y_scale);
end;

procedure TfrmStatCurveBig.pMoveTo(x, y: single; pbCanvas: TPaintBox);
var
  sx, sy: integer;
begin
  XYWorldToScreen(x, y, sx, sy);      //把XY系坐標轉換為實際坐標
  pbCanvas.Canvas.MoveTo(sx, sy);    //移動刷子到要畫的點
end;

procedure TfrmStatCurveBig.pLineTo(x, y: single; pbCanvas: TPaintBox);
var
  sx, sy: integer;
begin
  XYWorldToScreen(x, y, sx, sy);        //把XY系坐標轉換為實際坐標
  pbCanvas.Canvas.LineTo(sx, sy);      //連接兩點
end;

procedure TfrmStatCurveBig.pPolyline(rl: rLine; pbCanvas: TPaintBox);
var
  i: integer;
begin
  pbCanvas.Canvas.Pen.Color:=clRed;
  pMoveto(rl[0].x, rl[0].y, pbCanvas);
  for i := 1 to DotNum-1 do
    pLineto(rl[i].x, rl[i].y, pbCanvas);
end;

procedure TfrmStatCurveBig.SetPaintBoxPosition(imgCanvas: TImage; pbCanvas: TPaintBox);
begin
  pbCanvas.Left:=imgCanvas.Left+50;
  pbCanvas.Top:=imgCanvas.Top+30;
  pbCanvas.Width:=imgCanvas.Width-90;
  pbCanvas.Height:=imgCanvas.Height-60;
  px_min:=0;
  px_max:=pbCanvas.Width;
  py_min:=pbCanvas.Height;
  py_max:=0;
end;

procedure TfrmStatCurveBig.FormCreate(Sender: TObject);
var
  strSql: string;
  i: integer;
begin
  ADOConnection.ConnectionString := DataString;
  ADOConnection.Connected := True;
  strSql:='select Car_LicensePlate,Car_LicensePlateColor,Driver_ID,AccidentDoubtful_Time,AccidentDoubtful_Speed,AccidentDoubtful_Switch,AccidentDoubtful_ID from View_Data_AccidentDoubtful where Car_ID='+strCarID+' and AccidentDoubtful_CurveID='+strCurveID+' order by AccidentDoubtful_ID';
  ADOQuery.Close;
  ADOQuery.SQL.Clear;
  ADOQuery.SQL.Add(strSql);
  ADOQuery.Open;
  for i:=0 to 99 do
  begin
    tmpLine[i].x:=ADOQuery.FieldByName('AccidentDoubtful_Time').Value;
    tmpLine[i].y:=ADOQuery.FieldByName('AccidentDoubtful_Speed').Value;
    tmpLine[i].z:=ADOQuery.FieldByName('AccidentDoubtful_Switch').Value;
    ADOQuery.Next;
  end;
  strSql:='select Car_LicensePlate,Car_Type from Info_Car where Car_ID='+strCarID;
  ADOQuery.Close;
  ADOQuery.SQL.Clear;
  ADOQuery.SQL.Add(strSql);
  ADOQuery.Open;
  if NOT(ADOQuery.FieldByName('Car_LicensePlate').Value=NULL) then
    labCarLic.Caption:='車牌號碼：'+ADOQuery.FieldByName('Car_LicensePlate').AsString;
  if NOT(ADOQuery.FieldByName('Car_Type').Value=NULL) then
    labCarType.Caption:='車輛分類：'+ADOQuery.FieldByName('Car_Type').AsString;
  strSql:='select TOP 1 Driver_Licence,AccidentDoubtful_RealTime from View_Data_AccidentDoubtful where Car_ID='+strCarID+' and AccidentDoubtful_CurveID='+strCurveID+' order by AccidentDoubtful_ID DESC';
  ADOQuery.Close;
  ADOQuery.SQL.Clear;
  ADOQuery.SQL.Add(strSql);
  ADOQuery.Open;
  if NOT(ADOQuery.FieldByName('Driver_Licence').Value=NULL) then
    labDriverLic.Caption:='駕駛證號：'+ADOQuery.FieldByName('Driver_Licence').AsString;
  if NOT(ADOQuery.FieldByName('AccidentDoubtful_RealTime').Value=NULL) then
    labDateTime.Caption:='實時日期、時間（對應坐標20s處）：'+ADOQuery.FieldByName('AccidentDoubtful_RealTime').AsString;
  rePaintType:=mNoPaint;
  SetPaintBoxPosition(imgCanvas,pbCanvas);
  OriginAndScale(Sender);
  EstablishXYWorld(imgCanvas);
  old_x:=-1;
  old_y:=-1;
  DotNum:=100;//length(tmpLine);
  DrawLine(Sender);
  DrawSwitch(tmpLine,pbCanvas);
end;

procedure TfrmStatCurveBig.pbCanvasPaint(Sender: TObject);
begin
  if rePaintType=mRePaint then
    DrawLine(Sender);
end;

procedure TfrmStatCurveBig.pbCanvasMouseMove(Sender: TObject;
  Shift: TShiftState; X, Y: Integer);
begin
  edt_X.Text:=formatfloat('0.00',(x/x_scale));
  edt_Y.Text:=formatfloat('0.00',(py_min-y)/y_scale);
  lab_X.Visible:=true;
  lab_Y.Visible:=true;
  lab_X.Caption:='x: '+formatfloat('0.00',(x/x_scale));
  lab_Y.Caption:='y: '+formatfloat('0.00',(py_min-y)/y_scale);
  lab_X.Left:=pbCanvas.Left+x+10;
  lab_X.Top:=pbCanvas.Top+y-20;
  lab_Y.Left:=pbCanvas.Left+x+60;
  lab_Y.Top:=pbCanvas.Top+y-20;
  if (old_x<>-1) and (old_x>5) and (old_y<pbCanvas.Height-5) then
  begin
    pbCanvas.Canvas.Pen.Color:=clWhite;
    pbCanvas.Canvas.MoveTo(old_x,pbCanvas.Height-5);
    pbCanvas.Canvas.LineTo(old_x,0);
    pbCanvas.Canvas.MoveTo(5,old_y);
    pbCanvas.Canvas.LineTo(pbCanvas.Width,old_y);
  end;
  if rePaintType=mRePaint then
    DrawLine(Sender);
  if (x>5) and (y<pbCanvas.Height-5) then
  begin
    pbCanvas.Canvas.Pen.Color:=clBtnFace;
    pbCanvas.Canvas.MoveTo(x,pbCanvas.Height-5);
    pbCanvas.Canvas.LineTo(x,0);
    pbCanvas.Canvas.MoveTo(5,y);
    pbCanvas.Canvas.LineTo(pbCanvas.Width,y);
    old_x:=x;
    old_y:=y;
  end;
end;

procedure TfrmStatCurveBig.DrawLine(Sender: TObject);
begin
  pbCanvas.Canvas.Pen.Color := clRed;
  rePaintType:=mRePaint;
  pPolyline(tmpLine,pbCanvas);
  DrawSwitch(tmpLine,pbCanvas);
end;

procedure TfrmStatCurveBig.DrawSwitch(rl: rLine; pbCanvas: TPaintBox);
var
  i: Integer;
  j: Integer;
  intWritePrepare: Integer;
begin
  j:= y_max-8;
  //i:=0;
  intWritePrepare:=0;  //寫標志，0為不寫，1為準備寫
  pbCanvas.Canvas.Pen.Color := clBlue;
  pbCanvas.Canvas.MoveTo(0, j);
  {if rl[0].z = 1 then
  begin
    pbCanvas.Canvas.MoveTo(0, j-5);
    pbCanvas.Canvas.LineTo(trunc(rl[0].x*x_scale),j-5);
  end
  else
  begin
    pbCanvas.Canvas.MoveTo(0, j+5);
    pbCanvas.Canvas.LineTo(trunc(rl[0].x*x_scale),j+5);
  end;
  for i := 1 to DotNum-1 do
  begin
    if rl[i].z = 1 then
    begin
      pbCanvas.Canvas.LineTo(trunc(rl[i-1].x*x_scale),j-5);
      pbCanvas.Canvas.LineTo(trunc(rl[i].x*x_scale),j-5);
    end
    else
    begin
      pbCanvas.Canvas.LineTo(trunc(rl[i-1].x*x_scale),j+5);
      pbCanvas.Canvas.LineTo(trunc(rl[i].x*x_scale),j+5);
    end;
  end;}
  for i:=0 to DotNum-1 do
  begin
    if (intWritePrepare=0) and (rl[i].z=0) then
    begin
      CONTINUE;
    end;
    if (intWritePrepare=1) and (rl[i].z=0) then
    begin
      pbCanvas.Canvas.LineTo(trunc(rl[i].x*x_scale),j-5);
      intWritePrepare:=0;
    end;
    if (intWritePrepare=0) and (rl[i].z=1) then
    begin
      pbCanvas.Canvas.MoveTo(trunc(rl[i].x*x_scale), j-5);
      intWritePrepare:=1;
    end;
    if (intWritePrepare=1) and (rl[i].z=1) then
    begin
      if i=DotNum then
        pbCanvas.Canvas.LineTo(trunc(rl[i].x*x_scale),j-5)
      else
        CONTINUE;
    end;
  end;
end;

procedure TfrmStatCurveBig.btnPrintClick(Sender: TObject);
begin
  Print;
end;

end.