Delphi XE2 之 FireMonkey 入门(43) - 控件基础: TStringGrid、TGrid

Delphi XE2 之 FireMonkey 入门(43) - 控件基础: TStringGrid、TGrid

TStringGrid、TGrid 都是从 TCustomGrid 继承; 区别有:
1、它们的列对象分别是: TStringColumn、TColumn;
2、TStringGrid 比 TGrid 多出了 Cells[] 属性.

因为 TGrid 没有 Cells[] 属性, 暂时不方便使用; 我尝试取其当前单元值时竟然用了这样的代码:
(Grid1.Columns[Grid1.ColumnIndex].CellControlByRow(Grid1.Selected) as TTextCell).Text

TStringGrid 测试:

{ 设计时放好 StringGrid1, 运行时填充数据 }
procedure TForm1.FormCreate(Sender: TObject);
var
i,c,r: Integer;
begin
StringGrid1.AlternatingRowBackground := True;
StringGrid1.UseSmallScrollBars := True;
for i := 0 to 5 do //从设计时添加列比这方便
begin
with TStringColumn.Create(Self) do
begin
Parent := StringGrid1;
Width := StringGrid1.ClientWidth / 6;
end;
end;
StringGrid1.RowCount := 20;
for c := 0 to StringGrid1.ColumnCount - 1 do
for r := 0 to StringGrid1.RowCount - 1 do
StringGrid1.Cells[c, r] := Format('%d,%d', [c, r]);
end;

{ 取当前单元值 }
procedure TForm1.Button1Click(Sender: TObject);
begin
ShowMessage(StringGrid1.Cells[StringGrid1.ColumnIndex, StringGrid1.Selected]);
end;

成员概览:

{ TCustomGrid }
public
constructor Create(...); override;        //
destructor Destroy; override;             //
function ColumnByIndex(...): TColumn;     //根据索引获取列对象
function ColumnByPoint(...): TColumn;     //根据位置获取列对象
function RowByPoint(...): Integer;        //根据位置获取行号
procedure AddObject(...); override;       //
property TopRow: Integer ...;             //获取可见的首行的行号
property VisibleRows: Integer ...;        //获取可见的行总数
property ColumnCount: Integer ...;        //列数(也是只读)
property ColumnIndex: Integer ...;        //获取或设置列索引
property Columns[Index: Integer]: TColumn ...; //以数组索引的方式获取列对象
property RowCount: Integer ...;           //行数(可读写)
property Selected: Integer ...;           //当前行号
property OnGetValue: TOnGetValue ...;     //取值时
property OnSetValue: TOnSetValue ...;     //赋值时
published
property StyleLookup;                     //
property AlternatingRowBackground: Boolean ...; //是否使用交替背景; 默认 False
property CanFocus default True;           //
property DisableFocusEffect default True; //是否取消焦点特效
property RowHeight: Single ...;           //行高
property ShowSelectedCell: Boolean ...;   //是否呈现单元选择效果; 默认 True
property ShowVertLines: Boolean ...;      //是否显示竖格线
property ShowHorzLines: Boolean ...;      //是否显示横格线
property ShowHeader: Boolean ...;         //是否显示表格头
property ReadOnly: Boolean ...;           //是否只读; 默认 False
property TabOrder;                        //
property OnEdititingDone: TOnEdititingDone ...; //输入时
end;

{ TGrid }
TGrid = class(TCustomGrid)
published
property RowCount;   //
property OnGetValue; //
property OnSetValue; //
end;

{ TStringGrid }
public
property Cells[ACol, ARow: Integer]: string ...; //
published
property RowCount;   //
end;