构造自己的StringGrid

构造自己的StringGrid

{*******************************************************}
{                                                       }
{       Module Name: unitStringGrid.pas                 }
{       Author Ming.z                                   }
{       Creation Date 2010-12-29                        }
{                                                       }
{*******************************************************}
unit unitStringGrid;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Grids;

type
  TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    procedure FormCreate(Sender: TObject);
    procedure StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
      Rect: TRect; State: TGridDrawState);
  private
    { Private declarations }
  public
    { Public declarations }
    procedure InitStringGridData;
    procedure InitStringGridParam;
  end;

  TSGTitleEnum = (sgtID,sgtName,sgtAge,sgtSex,sgtAddr);
  TSGTitleSubRange = sgtID..sgtAddr;
  TSGRecord = record
    name:string;
    width:Word;
  end;

const //5 col N row
  SGTitle: array [TSGTitleEnum] of TSGRecord
  //SGTitle: array [TSGTitleSubRange] of TSGRecord //same as above
          = ((name:'ID'      ;width:40),
             (name:'Name'    ;width:70),
             (name:'Age'     ;width:45),
             (name:'Sex'     ;width:45),
             (name:'Address' ;width:80));
var
  Form1: TForm1;

implementation
{$R *.dfm}

procedure TForm1.InitStringGridData;
var
  i,j: Integer;
begin
  with StringGrid1 do
  begin
    for i := 0 to ColCount - 1 do
    for j := 1 to RowCount - 1 do
    begin
      case i of
        Ord(sgtID):
          Cells[i,j] := IntToStr(j);
      else
        Cells[i,j] := Format('%d%d',[i,j]);
      end;
    end;
  end;
end;

procedure TForm1.InitStringGridParam;
var
  i: Integer;
  lSG: TSGTitleSubRange;
begin
  //for lSG in [Low(lSG)..High(lSG)] do   //same as below
  for lSG in [Low(TSGTitleSubRange)..High(TSGTitleSubRange)] do
  begin
    i := Ord(lSG);
    StringGrid1.ColWidths[i] := SGTitle[lSG].width;
    StringGrid1.Cells[i,0] := SGTitle[lSG].name;
  end;
  InitStringGridData;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  InitStringGridParam;
end;

procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
  Rect: TRect; State: TGridDrawState);
begin
  with TStringGrid(sender).Canvas do
  begin
    if ARow = 0 then //Draw Title
    begin
      brush.color:=clTeal;
      FillRect(rect);
      Font.Style:=[fsBold];
      Font.Size:=10;
      Font.Color:=clYellow; //Grid font color
      OffsetRect(rect,1,1);
      DrawText(handle,PChar(TStringGrid(sender).cells[ACol,ARow])
        ,length(TStringGrid(sender).cells[ACol,ARow]),rect,DT_CENTER);
    end
    else
    case ACol of
      Ord(sgtID):
      begin
        //brush.color:=clBtnFace; //default
        brush.color:=clSkyBlue;
        FillRect(rect);
        Font.Style:=[fsBold];
        Font.Size:=9;
        Font.Color:=clRed; //Grid font color
        OffsetRect(rect,1,1);
        DrawText(handle,PChar(TStringGrid(sender).cells[ACol,ARow])
          ,length(TStringGrid(sender).cells[ACol,ARow]),rect,DT_CENTER);
      end;
      Ord(sgtName):
      begin
        brush.color:=clBtnFace; //default
        //brush.color:=clSkyBlue;
        FillRect(rect);
        Font.Style:=[fsBold];
        Font.Size:=9;
        Font.Color:=clRed; //Grid font color
        OffsetRect(rect,1,1);
        DrawText(handle,PChar(TStringGrid(sender).cells[ACol,ARow])
          ,length(TStringGrid(sender).cells[ACol,ARow]),rect,DT_CENTER);
      end;      
    else //default
      begin
        brush.color:=clBtnFace; //default
        //brush.color:=clSkyBlue;
        FillRect(rect);
        Font.Style:=[fsBold];
        Font.Size:=9;
        Font.Color:=clBlue; //Grid font color
        OffsetRect(rect,1,1);
        DrawText(handle,PChar(TStringGrid(sender).cells[ACol,ARow])
          ,length(TStringGrid(sender).cells[ACol,ARow]),rect,DT_CENTER);
      end
    end;
  end;
end;

end.