[evolution] ECompEditor: Set window's urgency hint after error when not focused

[Milan Crha <mcrha src gnome org>]

commit b3178ec93f2854123ed84c3fde440a4fa88bd970
Author: Milan Crha <mcrha redhat com>
Date:   Wed Aug 21 17:38:18 2019 +0200

    ECompEditor: Set window's urgency hint after error when not focused
    
    Let the user know that an ongoing operation finished with an error
    by setting the window's urgency hint when the window is not focused.

 src/calendar/gui/e-comp-editor.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
---
diff --git a/src/calendar/gui/e-comp-editor.c b/src/calendar/gui/e-comp-editor.c
index 171381d92d..015d66d796 100644
--- a/src/calendar/gui/e-comp-editor.c
+++ b/src/calendar/gui/e-comp-editor.c
@@ -1740,6 +1740,39 @@ comp_editor_selected_source_notify_cb (ECompEditorPageGeneral *page_general,
        e_comp_editor_open_target_client (comp_editor);
 }
 
+static gboolean
+e_comp_editor_focus_in_event_cb (GtkWindow *comp_editor,
+                                GdkEvent *event,
+                                gpointer user_data)
+{
+       gtk_window_set_urgency_hint (comp_editor, FALSE);
+
+       g_signal_handlers_disconnect_by_func (comp_editor,
+               G_CALLBACK (e_comp_editor_focus_in_event_cb), NULL);
+
+       return FALSE;
+}
+
+static void
+e_comp_editor_set_urgency_hint (ECompEditor *comp_editor)
+{
+       GtkWindow *window;
+
+       g_return_if_fail (E_IS_COMP_EDITOR (comp_editor));
+
+       window = GTK_WINDOW (comp_editor);
+
+       if (gtk_widget_get_visible (GTK_WIDGET (window)) &&
+           !gtk_window_is_active (window) &&
+           !gtk_window_get_urgency_hint (window)) {
+               gtk_window_set_urgency_hint (window, TRUE);
+
+               g_signal_connect (
+                       window, "focus-in-event",
+                       G_CALLBACK (e_comp_editor_focus_in_event_cb), NULL);
+       }
+}
+
 static void
 e_comp_editor_submit_alert (EAlertSink *alert_sink,
                            EAlert *alert)
@@ -1752,6 +1785,8 @@ e_comp_editor_submit_alert (EAlertSink *alert_sink,
        comp_editor = E_COMP_EDITOR (alert_sink);
 
        e_alert_bar_submit_alert (comp_editor->priv->alert_bar, alert);
+
+       e_comp_editor_set_urgency_hint (comp_editor);
 }
 
 static void
@@ -2709,6 +2744,8 @@ e_comp_editor_set_validation_error (ECompEditor *comp_editor,
 
        if (error_widget)
                gtk_widget_grab_focus (error_widget);
+
+       e_comp_editor_set_urgency_hint (comp_editor);
 }
 
 EShell *
@@ -3147,6 +3184,7 @@ e_comp_editor_add_alert (ECompEditor *comp_editor,
                NULL);
 
        e_alert_bar_add_alert (comp_editor->priv->alert_bar, alert);
+       e_comp_editor_set_urgency_hint (comp_editor);
 
        return alert;
 }