[chronojump] Discover manages correctly widgets when no devices

[Xavier de Blas <xaviblas src gnome org>]

commit 879b5d82e93330450a1c38b103195e788d071145
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri May 13 12:03:29 2022 +0200

    Discover manages correctly widgets when no devices

 src/gui/app1/chronojump.cs | 12 +++++++++---
 src/utilGtk.cs             | 13 +++++++++++++
 2 files changed, 22 insertions(+), 3 deletions(-)
---
diff --git a/src/gui/app1/chronojump.cs b/src/gui/app1/chronojump.cs
index 129409fb3..db3fe11e6 100644
--- a/src/gui/app1/chronojump.cs
+++ b/src/gui/app1/chronojump.cs
@@ -4560,8 +4560,7 @@ public partial class ChronoJumpWindow
        private void setup_progressbar_micro_discover_l (List<string> discoverPorts_l)
        {
                // 1) delete widgets of previous calls
-               foreach(Gtk.Widget w in table_micro_discover.Children)
-                       table_micro_discover.Remove(w);
+               UtilGtk.RemoveChildren(table_micro_discover);
 
                //table_micro_discover = new Gtk.Table((uint) microDiscover.ProgressBar_l.Count +1, 3, 
false); //not homogeneous
                table_micro_discover.Resize((uint) discoverPorts_l.Count, 3);
@@ -4612,7 +4611,6 @@ public partial class ChronoJumpWindow
                                        "Found 1 device.",
                                        "Found {0} devices.",
                                        discoverPorts_l.Count), discoverPorts_l.Count);
-               label_micro_discover_ports_detecting.Visible = true;
 
                app1s_notebook_sup_entered_from = notebook_sup.CurrentPage; //CONTACTS or ENCODER
                notebook_sup.CurrentPage = Convert.ToInt32(notebook_sup_pages.MICRODISCOVER);
@@ -4624,11 +4622,19 @@ public partial class ChronoJumpWindow
 
                if(discoverPorts_l != null && discoverPorts_l.Count > 0)
                {
+                       label_micro_discover_ports_detecting.Visible = true;
                        microDiscover = new MicroDiscover (discoverPorts_l); //all ports
                        setup_progressbar_micro_discover_l (discoverPorts_l);
                        discoverThread = new Thread (new ThreadStart (discoverDo));
                        GLib.Idle.Add (new GLib.IdleHandler (pulseDiscoverGTK));
                        discoverThread.Start();
+               } else {
+                       label_micro_discover_ports_detecting.Visible = false;
+                       UtilGtk.RemoveChildren(table_micro_discover);
+
+                       image_button_micro_discover_cancel_close.Pixbuf =
+                               new Pixbuf (null, Util.GetImagePath(false) + "image_close.png");
+                       label_button_micro_discover_cancel_close.Text = Catalog.GetString("Close");
                }
 
                //cDebug.StopAndPrint();
diff --git a/src/utilGtk.cs b/src/utilGtk.cs
index 2032e25bb..5fbb59744 100644
--- a/src/utilGtk.cs
+++ b/src/utilGtk.cs
@@ -489,6 +489,19 @@ public class UtilGtk
        }
 
 
+       /*
+        *
+        * CONTAINER
+        *
+        */
+
+       public static void  RemoveChildren (Gtk.Container c)
+       {
+               foreach(Gtk.Widget w in c.Children)
+                       c.Remove(w);
+       }
+
+
        /*
         *
         * COLORS