unit1.pas

本范例采用TPaintBox控件派生出仪表控件。 文件说明：PaintGrid.pas 网格型仪表控件源文件 Mymeter.pas 圆型仪表控件源文件 Project1是这两个控件的使用范

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Buttons, ExtCtrls, PaintGrid, Mymeter;

type
  TForm1 = class(TForm)
    BitBtn2: TBitBtn;
    Timer1: TTimer;
    Panel1: TPanel;
    Image1: TImage;
    PaintGrid1: TPaintGrid;
    Label1: TLabel;
    Label2: TLabel;
    Mymeter1: TMymeter;
    Mymeter2: TMymeter;
    Mymeter3: TMymeter;
    Edit2: TEdit;
    procedure BitBtn1Click(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  iTime:integer;

implementation

{$R *.dfm}

procedure TForm1.BitBtn1Click(Sender: TObject);
begin
  Timer1.Enabled := Not Timer1.Enabled;

end;

procedure TForm1.Timer1Timer(Sender: TObject);
var
  V1,V2:integer;
begin
   V1 :=  50+Random(200);
   V2 := 50+Random(200);
   PaintGrid1.PaintTime(V1,V2);
   Label1.Caption := inttostr(V1);
   Label2.Caption := inttostr(V2);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin

  //使用示范开始
  with Mymeter1 do
  begin
    Mymeter1.A1:=75;   //定义刻度第一段的角度
    A2:=15;    //定义刻度第二段的角度
    ColorA1:=clLime; //定义刻度第一段的色彩
    ColorA2:= Clred; //定义刻度第二段的色彩
    minvalue := 20.0; //最小值
    maxvalue := 90.0;  //最大值
    strUint :='Vac';
    Xwidth := Width;
    YHeight := Height;
    Paint;
  end;
 // Mymeter1.wi
  
   //使用示范开始
  with Mymeter2 do
  begin
    A1:=65;   //定义刻度第一段的角度
    A2:=25;    //定义刻度第二段的角度
    ColorA1:=clLime; //定义刻度第一段的色彩
    ColorA2:= Clred; //定义刻度第二段的色彩
    minvalue := 0.0; //最小值
    maxvalue := 300.0;  //最大值
    strUint :='A';
    Xwidth := Width;
    YHeight :=Height;
    Paint;
  end;
     //使用示范开始
  with Mymeter3 do
  begin
    A1:=65;   //定义刻度第一段的角度
    A2:=25;    //定义刻度第二段的角度
    ColorA1:=clLime; //定义刻度第一段的色彩
    ColorA2:= Clred; //定义刻度第二段的色彩
    minvalue := 0; //最小值
    maxvalue := 100;  //最大值
    strUint :='A';
    Xwidth := Width;
    YHeight := Height;
    IstemperatureMeter:= True;  //温度仪表
    Paint;
  end;
end;

procedure TForm1.BitBtn2Click(Sender: TObject);
begin
  Mymeter1.MyPaint(strtofloat(edit2.Text)); //画指针
  Mymeter2.MyPaint(strtofloat(edit2.Text)); //画指针
  Mymeter3.MyPaint(strtofloat(edit2.Text)); //画指针
end;

end.