Don't reload the search results unless necessary.

src/MainForm.cs

@@ -23,6 +23,7 @@ public partial class MainForm : Form
     private Panel mChartImagePanel = new Panel() ;
     private PictureBox mChartImagePictureBox = new PictureBox() ;
 
+    private string mSearchResultsKey = null ;
     private Point? mMouseDragAnchor = null ;
     private Tuple<int,int> mScrollDragAnchor ;
     private double mUserZoom = 1.0 ;
@@ -103,11 +104,15 @@ public partial class MainForm : Form
         List<ChartImage> results2 = new List<ChartImage>() ;
         foreach ( var r in results )
             results2.Add( r.Item1 ) ;
-        loadSearchResults( results2 ) ;
+        loadSearchResults( results2, searchQuery ) ;
     }
 
-    private void loadSearchResults( IEnumerable<ChartImage> chartImages )
+    private void loadSearchResults( IEnumerable<ChartImage> chartImages, string key )
     {
+        // check if we need to reload the search results
+        if ( key == mSearchResultsKey )
+            return ;
+
         // clear the search results
         mSearchResults.SuspendLayout() ;
         mSearchResults.Items.Clear() ;
@@ -123,5 +128,6 @@ public partial class MainForm : Form
                 item.Selected = true ;
         }
         mSearchResults.ResumeLayout( true ) ;
+        mSearchResultsKey = key ;
     }
 }

src/MainForm.ui.cs

@@ -132,7 +132,7 @@ public partial class MainForm : Form
 
         // load the chart images
         loadChartImages() ;
-        loadSearchResults( mChartImages.Values ) ;
+        loadSearchResults( mChartImages.Values, "" ) ;
     }
 
     private void MainForm_FormClosing( object sender, FormClosingEventArgs e )
@@ -364,7 +364,7 @@ public partial class MainForm : Form
             foreach ( ChartImage chartImage in chartImages )
                 logger.Info( $"- {chartImage.caption()}" ) ;
             mSearchQuery.Text = "" ;
-            loadSearchResults( chartImages ) ;
+            loadSearchResults( chartImages, "HOTKEY:"+e.Modifiers+":"+e.KeyCode ) ;
             e.Handled = true ;
             return ;
         }