,可以通过以下步骤实现:
示例代码如下:
procedure TForm1.StringGrid1DrawColumnCell(Sender: TObject; const Canvas: TCanvas; const Column: TColumn; const Bounds: TRectF; const Row: Integer; const Value: TValue; const State: TGridDrawStates);
var
CheckBoxRect: TRectF;
begin
if Column.Index = CheckBoxColumnIndex then
begin
CheckBoxRect := Bounds;
InflateRect(CheckBoxRect, -2, -2); // 调整复选框的大小
// 绘制复选框背景
Canvas.Fill.Color := TAlphaColorRec.White;
Canvas.FillRect(CheckBoxRect, 0, 0, [], 1);
// 绘制复选框边框
Canvas.Stroke.Color := TAlphaColorRec.Black;
Canvas.DrawRect(CheckBoxRect, 0, 0, [], 1);
// 根据当前单元格的值确定复选框的选中状态
if Value.AsBoolean then
begin
// 绘制选中状态的复选框
Canvas.Fill.Color := TAlphaColorRec.Blue;
Canvas.FillRect(RectF(CheckBoxRect.Left + 2, CheckBoxRect.Top + 2, CheckBoxRect.Right - 2, CheckBoxRect.Bottom - 2), 0, 0, [], 1);
end;
end;
end;
procedure TForm1.StringGrid1Click(Sender: TObject);
var
CheckBoxRect: TRectF;
Column: TColumn;
Row: Integer;
begin
Column := StringGrid1.Selected.Column;
Row := StringGrid1.Selected.Row;
if Column.Index = CheckBoxColumnIndex then
begin
CheckBoxRect := StringGrid1.CellRect(Column, Row);
InflateRect(CheckBoxRect, -2, -2); // 调整复选框的大小
// 切换复选框的选中状态
if StringGrid1.Cells[Column.Index, Row] = '1' then
StringGrid1.Cells[Column.Index, Row] := '0'
else
StringGrid1.Cells[Column.Index, Row] := '1';
// 重新绘制复选框
StringGrid1.Canvas.Fill.Color := TAlphaColorRec.White;
StringGrid1.Canvas.FillRect(CheckBoxRect, 0, 0, [], 1);
StringGrid1.Canvas.Stroke.Color := TAlphaColorRec.Black;
StringGrid1.Canvas.DrawRect(CheckBoxRect, 0, 0, [], 1);
if StringGrid1.Cells[Column.Index, Row] = '1' then
begin
StringGrid1.Canvas.Fill.Color := TAlphaColorRec.Blue;
StringGrid1.Canvas.FillRect(RectF(CheckBoxRect.Left + 2, CheckBoxRect.Top + 2, CheckBoxRect.Right - 2, CheckBoxRect.Bottom - 2), 0, 0, [], 1);
end;
end;
end;
这样,你就可以在字符串网格Delphi FMX中添加复选框了。在绘制事件中绘制复选框,并在点击事件中更新复选框的选中状态。根据需要,你可以进一步扩展该功能,例如添加复选框的点击事件处理、保存选中状态等。
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