仿任务管理器cpu占用显示

procedure TForm1.DrawPL(Shower:TImage);  //主要源码
var
  Bit: TBitmap;
  i: Integer;
  PW,PH: Integer;
  YValue:Integer;
begin
  //偏移量计算
  Inc(X);
  if X = GridSpace div MoveStep then
  X := 0;
  //初始化画布（双缓冲）
  Bit := TBitmap.Create;
  try
    PW := Shower.Width;
    PH := Shower.Height;
    Bit.Width := PW;
    Bit.Height := PH;
    //初始化网格竖线X坐标数组长度为宽/间隔 1
    SetLength(GridXPArr,PW div GridSpace   1);
    with Bit.Canvas do
    begin
      Brush.Color := clBlack;
      Brush.Style := bsSolid;
      Rectangle(0,0,PW,PH);
      Pen.Color := $00408000;
      //画网格，根据偏移量实现动态效果
      for i := 0 to PW div GridSpace   1 do
      begin
        GridXPArr[i] := GridSpace * i - X * MoveStep;
        MoveTo(GridXPArr[i],0);
        LineTo(GridXPArr[i],PH);
      end;
      for i := 0 to PH div GridSpace do
      begin
        MoveTo(0,GridSpace * i);
        LineTo(PW,GridSpace * i);
      end;
      //画折线
      Pen.Color := clLime;
      YValue := 0;
      //如果队列中有新的Y坐标点，则输出
      if YPQueue.Count > 0 then
      begin
        PYValue := YPQueue.Pop;
        YValue := PYValue^;
        Dispose(PYValue);
      end;
      //画笔移动到起点位置
      MoveTo(0,PH);
      //每执行一次函数，Y坐标向前移动一位，并连线各个点
      for i := 0 to Length(PointLst) - 2 do
      begin
        PointLst[i].Y := PointLst[i   1].Y;
        LineTo(PointLst[i 1].X,PointLst[i 1].Y);
      end;
      //按比例更新最后一位坐标点
      PointLst[Length(PointLst)-1].X := PW;
      PointLst[Length(PointLst)-1].Y := PH - (YValue  * PH div MaxY);
      //打印信息（可根据需要调整显示位置和内容）
      Brush.Style:=bsClear;
      Font.Color:=clYellow;
      TextOut(10,10,'数值:' inttostr(YValue));
    end;
    Shower.Canvas.Draw(0,0,Bit);
  finally
    Bit.Free;
  end;
end;