📅  最后修改于: 2023-12-03 15:30:26.106000             🧑  作者: Mango
在 Delphi 中,可以通过代码将光标移动到下一个 TEdit 控件。以下是实现该功能的步骤:
var
CurrentEdit: TEdit;
begin
CurrentEdit := ActiveControl as TEdit;
var
NextIndex: Integer;
NextEdit: TEdit;
begin
NextIndex := CurrentEdit.TabOrder + 1;
NextEdit := FindNextControl(CurrentEdit, True, True, False) as TEdit;
while (NextEdit <> nil) and (NextEdit.TabOrder <> NextIndex) do
begin
NextEdit := FindNextControl(NextEdit, True, True, False) as TEdit;
end;
if NextEdit <> nil then
begin
NextEdit.SetFocus;
end;
完整的代码如下:
var
CurrentEdit: TEdit;
NextIndex: Integer;
NextEdit: TEdit;
begin
CurrentEdit := ActiveControl as TEdit;
NextIndex := CurrentEdit.TabOrder + 1;
NextEdit := FindNextControl(CurrentEdit, True, True, False) as TEdit;
while (NextEdit <> nil) and (NextEdit.TabOrder <> NextIndex) do
begin
NextEdit := FindNextControl(NextEdit, True, True, False) as TEdit;
end;
if NextEdit <> nil then
begin
NextEdit.SetFocus;
end;
end;
值得注意的是,如果控件的顺序号不是连续的,或者存在其他类型的控件,例如 TLabel,那么就不能简单地使用 TabOrder 属性来确定下一个控件。此时,可以使用 FindNextControl 函数来查找下一个 TEdit 控件。该函数的参数含义分别为当前控件、是否循环、是否包括隐藏的控件、是否只查找指定类型的控件。