Re: Help with modal dialog

["Matthew A. Postiff" <postiffm comcast net>]

OK, you folks are good. The object that manages this dialog did go out
of scope and that killed the dialog. So I fixed that. Now the dialog is
non-modal, it can stay up just like I wanted it.

At this point my question has to do with destroying that dialog properly.

My mainwindow object has a SystemlogDialog* syslog. When mainwindow gets
a signal that Help | System log menu item has been clicked, it does:

void MainWindow::viewlog()
{
  if (!syslogdialog) {
    syslogdialog = new SystemlogDialog(0);
    syslogdialog->run();
  }
  else {
    // What to do? Raise the window? Grab focus?
    syslogdialog->run();
  }
}

int SystemlogDialog::run()
{
  gtk_widget_show_all(dialog);
  return 0;
}

Problem is when I open the dialog, close it, and re-open it,
syslogdialog still points to the first object, and a dialog box with
gray background, no contents is shown.

What is the right way to catch a signal, tell the containing class to
delete and null-ify sysdialog, so everything can "start over" the next
time the user wants the dialog?

Thanks so much,

Matt

On 4/21/2016 3:04 PM, Phil Wolff wrote:
> Sounds like your dialog goes out of scope when the "return 0"
> statement executes. Is the pointer to the dialog stored on the stack
> as a local variable, or as a class variable that will be preserved
> until the class is destroyed?
>
> On 2016-04-20 06:50 PM, Matthew A. Postiff wrote:
> > On 4/20/2016 2:07 AM, Marius Gedminas wrote:
> > > On Tue, Apr 19, 2016 at 10:07:50AM -0400, Matt Postiff wrote:
> > > > I have a working dialog that displays a system log file in "real time"
> > > > in my gtk2 Windows/Linux app. It is modal.
> > > >
> > > > What I want to do is make it non-modal so it can float off to the side
> > > > of my app and always be visible while I work in the app.
> > > >
> > > > I have tried to gtk_window_set_modal to FALSE and also set <property
> > > > name="modal">False</property> in the gtkbuilder xml.
> > > >
> > > > A snippet of the code and xml is at http://pastebin.com/mACPZP85
> > > >
> > > > Any ideas what I'm doing wrong? Thank you.
> > > How are you displaying that dialog?  Your code snipped doesn't include
> > > that part.  Make sure you don't use gtk_dialog_run().  Use
> > > gtk_widget_show() or gtk_widget_show_all() (whichever is appropriate)
> > > and return to the main loop.
> > >
> > > Marius Gedminas
> > You are right. I had:
> > return gtk_dialog_run(GTK_DIALOG(dialog));
> >
> > I'm very new at this. I tried replacing that with:
> > gtk_widget_show_all(dialog);
> > return 0; // I don't use the return value anyway
> >
> > and the dialog momentarily appears, then disappears quickly before I can
> > see if the guts of it are all present.
> >
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