Show something when there are no results

src/modules/FileLocksmith/FileLocksmithGUI/MainWindow.idl

@@ -4,5 +4,6 @@ namespace FileLocksmithGUI
     runtimeclass MainWindow : Microsoft.UI.Xaml.Window
     {
         MainWindow();
+        void DisplayNoResultsInfo();
     }
 }

src/modules/FileLocksmith/FileLocksmithGUI/MainWindow.xaml.cpp

@@ -32,11 +32,17 @@ namespace winrt::FileLocksmithGUI::implementation
 
         // TODO move to another thread
         stackPanel().Children().Clear();
+
         for (const auto& process : m_process_info)
         {
             ProcessEntry entry(process.name, process.pid, process.num_files);
             stackPanel().Children().Append(entry);
         }
+
+        if (m_process_info.empty())
+        {
+            DisplayNoResultsInfo();
+        }
     }
 
     void MainWindow::place_and_resize()
@@ -81,4 +87,14 @@ namespace winrt::FileLocksmithGUI::implementation
         
         app_window.MoveAndResize(rect);
     }
+
+    void MainWindow::DisplayNoResultsInfo()
+    {
+        // Construct the UI element and display it
+        Controls::TextBlock text;
+        text.Text(L"No results.");
+        text.HorizontalAlignment(HorizontalAlignment::Center);
+        text.VerticalAlignment(VerticalAlignment::Center);
+        stackPanel().Children().Append(text);
+    }
 }

src/modules/FileLocksmith/FileLocksmithGUI/MainWindow.xaml.h

@@ -8,7 +8,7 @@ namespace winrt::FileLocksmithGUI::implementation
     struct MainWindow : MainWindowT<MainWindow>
     {
         MainWindow();
-
+        void DisplayNoResultsInfo();
     private:
         std::vector<ProcessResult> m_process_info;
         void find_processes();

src/modules/FileLocksmith/FileLocksmithGUI/ProcessEntry.xaml.cpp

@@ -42,5 +42,11 @@ namespace winrt::FileLocksmithGUI::implementation
         {
             siblings.RemoveAt(index);
         }
+
+        if (siblings.Size() == 0)
+        {
+            auto main_window = Parent().as<Controls::StackPanel>().Parent().as<MainWindow>();
+            main_window.DisplayNoResultsInfo();
+        }
     }
 }