[gtkmm-documentation] Dialog examples: Small updates

[Kjell Ahlstedt <kjellahl src gnome org>]

commit e2b64f2bffcbb85a8b834058e41034711008d52c
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Tue Jul 12 18:56:51 2022 +0200

    Dialog examples: Small updates
    
    ColorChooserDialog, FileChooserDialog, FileChooserNative,
    FontChooserDialog, MessageDialog:
    Use std::make_unique. Print value of response_id if an unexpected
    button is clicked.

 examples/book/dialogs/colorchooserdialog/examplewindow.cc |  2 +-
 examples/book/dialogs/filechooserdialog/examplewindow.cc  |  4 ++--
 examples/book/dialogs/filechoosernative/examplewindow.cc  |  2 +-
 examples/book/dialogs/fontchooserdialog/examplewindow.cc  |  2 +-
 examples/book/dialogs/messagedialog/examplewindow.cc      | 13 +++++++++----
 5 files changed, 14 insertions(+), 9 deletions(-)
---
diff --git a/examples/book/dialogs/colorchooserdialog/examplewindow.cc 
b/examples/book/dialogs/colorchooserdialog/examplewindow.cc
index 55ce98f..14388fd 100644
--- a/examples/book/dialogs/colorchooserdialog/examplewindow.cc
+++ b/examples/book/dialogs/colorchooserdialog/examplewindow.cc
@@ -61,7 +61,7 @@ void ExampleWindow::on_button_dialog_clicked()
 {
   if (!m_pDialog)
   {
-    m_pDialog.reset(new Gtk::ColorChooserDialog("Please choose a color", *this));
+    m_pDialog = std::make_unique<Gtk::ColorChooserDialog>("Please choose a color", *this);
     m_pDialog->set_modal(true);
     m_pDialog->set_hide_on_close(true);
     m_pDialog->signal_response().connect(
diff --git a/examples/book/dialogs/filechooserdialog/examplewindow.cc 
b/examples/book/dialogs/filechooserdialog/examplewindow.cc
index af22fca..8b7d2d7 100644
--- a/examples/book/dialogs/filechooserdialog/examplewindow.cc
+++ b/examples/book/dialogs/filechooserdialog/examplewindow.cc
@@ -99,7 +99,7 @@ void ExampleWindow::on_file_dialog_response(int response_id, Gtk::FileChooserDia
     }
     default:
     {
-      std::cout << "Unexpected button clicked." << std::endl;
+      std::cout << "Unexpected button clicked: " << response_id << std::endl;
       break;
     }
   }
@@ -141,7 +141,7 @@ void ExampleWindow::on_folder_dialog_response(int response_id, Gtk::FileChooserD
     }
     default:
     {
-      std::cout << "Unexpected button clicked." << std::endl;
+      std::cout << "Unexpected button clicked: " << response_id << std::endl;
       break;
     }
   }
diff --git a/examples/book/dialogs/filechoosernative/examplewindow.cc 
b/examples/book/dialogs/filechoosernative/examplewindow.cc
index 850a78f..6594bc2 100644
--- a/examples/book/dialogs/filechoosernative/examplewindow.cc
+++ b/examples/book/dialogs/filechoosernative/examplewindow.cc
@@ -77,7 +77,7 @@ void ExampleWindow::on_dialog_response(int response_id)
     break;
 
   default:
-    std::cout << "Unexpected button clicked." << std::endl;
+    std::cout << "Unexpected button clicked: " << response_id << std::endl;
     break;
   }
 }
diff --git a/examples/book/dialogs/fontchooserdialog/examplewindow.cc 
b/examples/book/dialogs/fontchooserdialog/examplewindow.cc
index 598fa2c..1b99347 100644
--- a/examples/book/dialogs/fontchooserdialog/examplewindow.cc
+++ b/examples/book/dialogs/fontchooserdialog/examplewindow.cc
@@ -53,7 +53,7 @@ void ExampleWindow::on_button_dialog_clicked()
 {
   if (!m_pDialog)
   {
-    m_pDialog.reset(new Gtk::FontChooserDialog("Please choose a font", *this));
+    m_pDialog = std::make_unique<Gtk::FontChooserDialog>("Please choose a font", *this);
     m_pDialog->set_modal(true);
     m_pDialog->set_hide_on_close(true);
     m_pDialog->signal_response().connect(
diff --git a/examples/book/dialogs/messagedialog/examplewindow.cc 
b/examples/book/dialogs/messagedialog/examplewindow.cc
index eeb7165..f242190 100644
--- a/examples/book/dialogs/messagedialog/examplewindow.cc
+++ b/examples/book/dialogs/messagedialog/examplewindow.cc
@@ -45,7 +45,7 @@ ExampleWindow::~ExampleWindow()
 
 void ExampleWindow::on_button_info_clicked()
 {
-  m_pDialog.reset(new Gtk::MessageDialog(*this, "This is an INFO MessageDialog"));
+  m_pDialog = std::make_unique<Gtk::MessageDialog>(*this, "This is an INFO MessageDialog");
   m_pDialog->set_secondary_text(
           "And this is the secondary text that explains things.");
   m_pDialog->set_modal(true);
@@ -58,9 +58,9 @@ void ExampleWindow::on_button_info_clicked()
 
 void ExampleWindow::on_button_question_clicked()
 {
-  m_pDialog.reset(new Gtk::MessageDialog(*this, "This is a QUESTION MessageDialog",
+  m_pDialog = std::make_unique<Gtk::MessageDialog>(*this, "This is a QUESTION MessageDialog",
           false /* use_markup */, Gtk::MessageType::QUESTION,
-          Gtk::ButtonsType::OK_CANCEL, true /* modal */));
+          Gtk::ButtonsType::OK_CANCEL, true /* modal */);
   m_pDialog->set_secondary_text(
           "And this is the secondary text that explains things.");
   m_pDialog->set_hide_on_close(true);
@@ -87,9 +87,14 @@ void ExampleWindow::on_question_dialog_response(int response_id)
       std::cout << "Cancel clicked." << std::endl;
       break;
     }
+    case Gtk::ResponseType::DELETE_EVENT:
+    {
+      std::cout << "Dialog closed." << std::endl;
+      break;
+    }
     default:
     {
-      std::cout << "Unexpected button clicked." << std::endl;
+      std::cout << "Unexpected button clicked: " << response_id << std::endl;
       break;
     }
   }