unit TitleF;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
CheckBox1: TCheckBox;
Edit1: TEdit;
Label1: TLabel;
GroupBox1: TGroupBox;
RadioButton2: TRadioButton;
RadioButton1: TRadioButton;
procedure AnyClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
uses
TypInfo;
{$R *.DFM}
procedure TForm1.AnyClick(Sender: TObject);
var
PropInfo: PPropInfo;
Capt: string;
// pcCapt: array [0..100] of Char;
begin
// we'd like to write:
// Sender.Caption := Sender.Caption + '*';
{ // Solution 1:
// get the current value
(Sender as TControl).GetTextBuf (
pcCapt, sizeof (pcCapt));
// add a *
StrCat (pcCapt, '*');
// set the new value
(Sender as TControl).SetTextBuf (pcCapt);}
// Solution 2:
// get property RTTI
PropInfo := GetPropInfo (Sender.ClassInfo, 'Caption');
// try again
if PropInfo = nil then
PropInfo := GetPropInfo (Sender.ClassInfo, 'Text');
// if found, apply the new value
if PropInfo <> nil then
begin
Capt := GetStrProp (Sender, PropInfo);
Capt := Capt + '*';
SetStrProp (Sender, PropInfo, Capt);
end;
end;
end.
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Определить каким свойством определяется заголовок у компонента, и изменить его
