ProcessEventQueue(): Worker is not assigned

[Roberto Nicchi]

I have the exception "ProcessEventQueue(): Worker is not assigned." when the statement "UniSession.Synchronize" is executed in the code below.

Is my code wrong ?

thanks

 

procedure Tmyframe.create_report;

var
  dest:Tdest_report_frm;
begin
    dest:=Tdest_report_frm.Create(uniGUIApplication.UniApplication);

    dest.showmodal(procedure(sender:Tcomponent; res:integer)
                   begin
                     if res=mrOk then
                     begin
                       ShowMask('Please wait ...');
                       UniSession.Synchronize; <--- EXCEPTION HERE
                       try
                         CreateTheReport;
                       finally
                         HideMask;
                         UniSession.Synchronize;
                       end;
                     end;
                   end
                  );

[Farshad Mohajeri]

This error shows that Synchronize() can not be called here for different reasons.

You should not use Synchronize to display masks. Simply enable ScreenMask property of the Button which closes the form.

 

[Roberto Nicchi]

46 minutes ago, Farshad Mohajeri said:

This error shows that Synchronize() can not be called here for different reasons.

You should not use Synchronize to display masks. Simply enable ScreenMask property of the Button which closes the form.

 

Ok, thanks.

Roberto

[Roberto Nicchi]

20 minutes ago, Roberto Nicchi said:

Ok, thanks.

Roberto

BUT  if in the button that close the form i want a confirmation (see below), again there's the same problem. Is there a workaround for this ?

 

 

  if messagedlg('Confirm ?',mtConfirmation,[mbyes,mbno])=mrYes then
  begin
    ShowMask('Please wait ...');

    UniSession.Synchronize;

    modalresult:=mrOk;
  end;
 

[Roberto Nicchi]

Ok, only now i have realized that there's a showmask property in the Tunibutton

It works fine BUT, if in the button onclick event a messagedlg method is executed, the mask is not visualized. Is it WAD ?

thanks

[Roberto Nicchi]

10 minutes ago, Roberto Nicchi said:

Ok, only now i have realized that there's a showmask property in the Tunibutton

It works fine BUT, if in the button onclick event a messagedlg method is executed, the mask is not visualized. Is it WAD ?

thanks

I was folgorated by an idea. Maybe I have to make the request for confirmation with JS code ? If this is correct could anyone tell me how? Unfortunately my knowledge of JS is zero.

[Roberto Nicchi]

Ok i have the solution. See below. Let me know if there's another (better/faster) solution.

In the button have defined the JS event click (in Extevents)

 

function click(sender, e, eOpts)
{
  if (confirm("Confermation request")==true)
    ajaxRequest(sender, '_doit', []);  
}

 

in the button have definied the onajaxevent event

 

  if EventName = '_doit' then
  begin
    modalresult:=mrOk;
  end;