MessageDialog in Delphi 10.3

[baquelo 0]

Hi!!

I need a confirmation box (Yes and No options) in Android, but in Delphi 10.3 dont work, the app crash... In the Delphi 10.1 work fine...

 

Function TForm1.mensagemConfirmacao(pMensagem: String): TModalResult;
Var
  MR: TModalResult;
Begin
  MR := mrNone;
  TDialogService.MessageDialog(pMensagem, TMsgDlgType.mtConfirmation,
    [TMsgDlgBtn.mbYes, TMsgDlgBtn.mbNo], TMsgDlgBtn.mbYes, 0,
    Procedure(Const AResult: TModalResult)
    Begin
      MR := AResult;
    End);
  While MR = mrNone Do
  begin
    Application.ProcessMessages;
  end;
  result := MR;
End;

Help me please!!

[mausmb 13]

This code working just fine in 10.3 Android & Windows ... dont' know with Tmodalresult

  TDialogService.MessageDialog((mymessage),
      system.UITypes.TMsgDlgType.mtConfirmation,
      [system.UITypes.TMsgDlgBtn.mbYes, system.UITypes.TMsgDlgBtn.mbNo], system.UITypes.TMsgDlgBtn.mbYes,0,
procedure (const AResult: System.UITypes.TModalResult)
  begin
          case AResult of
            mrYES: Begin .....

br,

Edited January 16, 2019 by mausmb

[baquelo 0]

On 1/16/2019 at 4:10 PM, mausmb said:

This code working just fine in 10.3 Android & Windows ... dont' know with Tmodalresult

  TDialogService.MessageDialog((mymessage),
      system.UITypes.TMsgDlgType.mtConfirmation,
      [system.UITypes.TMsgDlgBtn.mbYes, system.UITypes.TMsgDlgBtn.mbNo], system.UITypes.TMsgDlgBtn.mbYes,0,
procedure (const AResult: System.UITypes.TModalResult)
  begin
          case AResult of
            mrYES: Begin .....

br,

Thanks for reply! I reinstall Delphi 10.1.

[Rollo62 536]

On 1/16/2019 at 1:22 PM, baquelo said:

  While MR = mrNone Do
  begin
    Application.ProcessMessages;
  end;

I always consider the Application.ProcessMessages suspicious, do you really need this ?

Usualy I'm fine when reacting to my stuff directly in the anonymous procedure.

Edited January 22, 2019 by Rollo62

[baquelo 0]

7 hours ago, Rollo62 said:

I always consider the Application.ProcessMessages suspicious, do you really need this ?

Usualy I'm fine when reacting to my stuff directly in the anonymous procedure.

I'm a beginner in Delphi and I picked up a project in the company where the programmer used the code that way. I was just migrating the Delphi 10.1 project to Delphi 10.3. I did not really think about using the anonymous procedure. Soon I will reinstall Delphi 10.3 and I will proceed to use the anonymous procedure. Many thanks for the reply.

[Rollo62 536]

The anonymous procedure helps to keep your app responsive, instead just showing a modal dialog or form.
This is required on mobile devices, but I also highly recommend to use the same strategy for desktop too.

There are many other methods to prevent unwanted user actions while the dialog is shown, beside modal dialogs and forms.

[KASKAGROSSA 0]

Just use Multview to result by another button procedure... I did it and 100% works fine...