这似乎是一个很显然的需求。我想让文本位于单元格的中央,但出于某些原因,我在属性中找不到它。我应该如何做到这一点?
这似乎是一个很显然的需求。我想让文本位于单元格的中央,但出于某些原因,我在属性中找不到它。我应该如何做到这一点?
在TStringGrid中没有居中文本的属性,但是你可以在DrawCell事件中进行操作,如下所示:
procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
Rect: TRect; State: TGridDrawState);
var
S: string;
SavedAlign: word;
begin
if ACol = 1 then begin // ACol is zero based
S := StringGrid1.Cells[ACol, ARow]; // cell contents
SavedAlign := SetTextAlign(StringGrid1.Canvas.Handle, TA_CENTER);
StringGrid1.Canvas.TextRect(Rect,
Rect.Left + (Rect.Right - Rect.Left) div 2, Rect.Top + 2, S);
SetTextAlign(StringGrid1.Canvas.Handle, SavedAlign);
end;
end;
我从这里发布的代码。
更新:
要在单元格中编写文本时居中,将此代码添加到GetEditText
事件中:
procedure TForm1.StringGrid1GetEditText(Sender: TObject; ACol, ARow: Integer;
var Value: string);
var
S : String;
I: Integer;
IE : TInplaceEdit ;
begin
for I := 0 to StringGrid1.ControlCount - 1 do
if StringGrid1.Controls[i].ClassName = 'TInplaceEdit' then
begin
IE := TInplaceEdit(StringGrid1.Controls[i]);
ie.Alignment := taCenter
end;
end;
TStringGrid.SetCellsAlignment
和 TStringGrid.SetCellsAlignment
,(-1 < Index)
比较是正确的,但是 then
和 else
部分被交换了... 正确版本(即此版本)将显示当索引大于-1时,它将覆盖存储的值,否则它将添加一个新条目,其他版本将执行相反的操作,从而带来一个列表索引消息错误,请注意检查。unit AlignedTStringGrid;
interface
uses Windows,SysUtils,Classes,Grids;
type
TStringGrid=class(Grids.TStringGrid)
private
FCellsAlignment:TStringList;
FColsDefaultAlignment:TStringList;
function GetCellsAlignment(ACol,ARow:Integer):TAlignment;
procedure SetCellsAlignment(ACol,ARow:Integer;const Alignment:TAlignment);
function GetColsDefaultAlignment(ACol:Integer):TAlignment;
procedure SetColsDefaultAlignment(ACol:Integer;const Alignment:TAlignment);
protected
procedure DrawCell(ACol,ARow:Longint;ARect:TRect;AState:TGridDrawState);override;
public
constructor Create(AOwner:TComponent);override;
destructor Destroy;override;
property CellsAlignment[ACol,ARow:Integer]:TAlignment read GetCellsAlignment write SetCellsAlignment;
property ColsDefaultAlignment[ACol:Integer]:TAlignment read GetColsDefaultAlignment write SetColsDefaultAlignment;
end;
implementation
constructor TStringGrid.Create(AOwner:TComponent);
begin
inherited Create(AOwner);
FCellsAlignment:=TStringList.Create;
FCellsAlignment.CaseSensitive:=True;
FCellsAlignment.Sorted:=True;
FCellsAlignment.Duplicates:=dupIgnore;
FColsDefaultAlignment:=TStringList.Create;
FColsDefaultAlignment.CaseSensitive:=True;
FColsDefaultAlignment.Sorted:=True;
FColsDefaultAlignment.Duplicates:=dupIgnore;
end;
destructor TStringGrid.Destroy;
begin
FCellsAlignment.Free;
FColsDefaultAlignment.Free;
inherited Destroy;
end;
procedure TStringGrid.SetCellsAlignment(ACol,ARow: Integer; const Alignment: TAlignment);
var
Index:Integer;
begin
if (-1 < Index) then begin
FCellsAlignment.Objects[Index]:= TObject(Alignment);
end else begin
FCellsAlignment.AddObject(IntToStr(ACol) + '-' + IntToStr(ARow), TObject(Alignment));
end;
end;
function TStringGrid.GetCellsAlignment(ACol,ARow: Integer): TAlignment;
var
Index:Integer;
begin
Index:= FCellsAlignment.IndexOf(IntToStr(ACol)+'-'+IntToStr(ARow));
if (-1 < Index) then begin
GetCellsAlignment:= TAlignment(FCellsAlignment.Objects[Index]);
end else begin
GetCellsAlignment:= ColsDefaultAlignment[ACol];
end;
end;
procedure TStringGrid.SetColsDefaultAlignment(ACol: Integer; const Alignment: TAlignment);
var
Index:Integer;
begin
Index:= FColsDefaultAlignment.IndexOf(IntToStr(ACol));
if (-1 < Index) then begin
FColsDefaultAlignment.Objects[Index]:= TObject(Alignment);
end else begin
FColsDefaultAlignment.AddObject(IntToStr(ACol), TObject(Alignment));
end;
end;
function TStringGrid.GetColsDefaultAlignment(ACol:Integer):TAlignment;
var
Index:Integer;
begin
Index:= FColsDefaultAlignment.IndexOf(IntToStr(ACol));
if (-1 < Index) then begin
GetColsDefaultAlignment:= TAlignment(FColsDefaultAlignment.Objects[Index]);
end else begin
GetColsDefaultAlignment:=taLeftJustify;
end;
end;
procedure TStringGrid.DrawCell(ACol,ARow:Longint;ARect:TRect;AState:TGridDrawState);
var
Old_DefaultDrawing:Boolean;
begin
if DefaultDrawing then begin
case CellsAlignment[ACol,ARow] of
taLeftJustify: begin
Canvas.TextRect(ARect,ARect.Left+2,ARect.Top+2,Cells[ACol,ARow]);
end;
taRightJustify: begin
Canvas.TextRect(ARect,ARect.Right -2 -Canvas.TextWidth(Cells[ACol,ARow]), ARect.Top+2,Cells[ACol,ARow]);
end;
taCenter: begin
Canvas.TextRect(ARect,(ARect.Left+ARect.Right-Canvas.TextWidth(Cells[ACol,ARow]))div 2,ARect.Top+2,Cells[ACol,ARow]);
end;
end;
end;
Old_DefaultDrawing:= DefaultDrawing;
DefaultDrawing:=False;
inherited DrawCell(ACol,ARow,ARect,AState);
DefaultDrawing:= Old_DefaultDrawing;
end;
end.
AlignedTStringGrid.pas
的文件中。TStringGrid
的窗体上,在接口使用子句的末尾添加 ,AlignedTStringGrid
。TEdit.CreateParams
或阅读文章 如何设置 TEdit 控件的文本对齐方式。
OnDrawCell
事件中实现的,应该保留在那里。如果您希望输入在用户居中时居中显示,则应使用编辑器TEdit/TWhateverEdit的绘制事件来实现。 - zz1433