Dismiss Notice

REGISTRATION IS AFTER ADMIN ACTIVATION

DONATIONS WITH PAYPAL CLICK TO BUTTON

1 MONTH VIP - 5$; 3 MONTHS VIP - 10$; 6 MONTHS VIP - 20$; 1 YEAR VIP - 30$; 2 YEARS VIP - 50$; GOLD USER FOR LIFE VIP - 150$

DONATIONS WITH Bitcoin Address:3NRs3CK3fhXifrNYxHEZKpETDd9vNLMsMD

Dismiss Notice
The registration is approved by the Administrator. It takes about 1 day to approve your registration
Dismiss Notice
For open hidden message no need write thanks, thank etc. Enough is click to like button on right side of thread.

Call forms in Delphi using Generics

Discussion in 'Delphi Programming' started by N0body, May 29, 2014.

  1. N0body
    Online

    N0bodyN0body is a Verified Member DelphiFan Administrator Staff Member DF Staff

    What is Generics – http://docwiki.embarcadero.com/RADStudio/XE4/en/Overview_of_Generics

    Declaring class with static methods to create a form.

    Code:
    type
      TCallForms = class
        class procedure ShowModal();  overload; static;
        class procedure ShowModal( var pForm: F );  overload; static;
      end;
    Implementing generics functions to call form

    Code:
    class procedure TCallForms.ShowModal(var pForm: F);
    begin
      pForm := F( TFormClass(F).Create( nil ) );
      try
        pForm.ShowModal
      finally
        FreeAndNil(pForm);
      end;
    end;
    
    class procedure TCallForms.ShowModal();
    var
      Form: F;
    begin
      TCallForms.ShowModal(Form);
    end;
    How to use.
    Created and assigned variable global.

    1
    TCallForms.ShowModal<TForm1>(Form1);
    Created and not assigned varible.


    1
    TCallForms.ShowModal<TForm1>();
    The full source code. HERE
     

Share This Page

Laws
Our website, law, laws, copyright and aims to be respectful of individual rights. Our site, as defined in the law of 5651 serves as a provider of space. According to the law, contrary to the law of site management has no obligation to monitor content. Therefore, our site has adopted the principle of fit and remove. Works are subject to copyright laws and is shared in a manner that violated their legal rights, or professional associations, rights holders who, adsdelphi@gmail.com I can reach us at e-mail address. Complaints considered to be infringing on the examination of the content will be removed from our site.
Donate Help To Us and Be VIP
DONATIONS WITH PAYPAL CLICK TO BUTTON
6 MONTHS VIP - 20$; 1 YEAR VIP - 30$; 2 YEARS VIP - 50$; GOLD USER FOR LIFE VIP - 150$
Social Block