Only load preview when preview panel is open

Author: VictoriousRaptor

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -99,6 +99,15 @@ public MainViewModel(Settings settings)
             };
             _selectedResults = Results;
 
+            Results.PropertyChanged += (_, args) =>
+            {
+                switch (args.PropertyName)
+                {
+                    case nameof(Results.SelectedItem):
+                        UpdatePreview();
+                        break;
+                }
+            };
 
             RegisterViewUpdate();
             RegisterResultsUpdatedEvent();
@@ -441,6 +450,7 @@ private void ShowPreview()
         {
             ResultAreaColumn = 1;
             PreviewVisible = true;
+            Results.SelectedItem?.LoadPreviewImage();
         }
 
         private void HidePreview()
@@ -461,6 +471,14 @@ public void ResetPreview()
             }
         }
 
+        private void UpdatePreview()
+        {
+            if (PreviewVisible)
+            {
+                Results.SelectedItem?.LoadPreviewImage();
+            }
+        }
+
         /// <summary>
         /// we need move cursor to end when we manually changed query
         /// but we don't want to move cursor to end when query is updated from TextBox

Flow.Launcher/ViewModel/ResultViewModel.cs

@@ -90,6 +90,14 @@ public Visibility ShowIcon
             }
         }
 
+        public bool UsePreviewImage
+        {
+            //todo binding
+            get => !ImgIconAvailable && !GlyphAvailable ||
+                Settings.UseGlyphIcons && !GlyphAvailable && ImgIconAvailable ||
+                !Settings.UseGlyphIcons && ImgIconAvailable;
+        }
+
         public double IconRadius
         {
             get
@@ -153,16 +161,7 @@ public ImageSource Image
 
         public ImageSource PreviewImage
         {
-            get
-            {
-                if (!PreviewImageLoaded)
-                {
-                    PreviewImageLoaded = true;
-                    _ = LoadPreviewImageAsync();
-                }
-
-                return previewImage;
-            }
+            get => previewImage;
             private set => previewImage = value;
         }
 
@@ -223,6 +222,15 @@ private async Task LoadPreviewImageAsync()
             }
         }
 
+        public void LoadPreviewImage()
+        {
+            if (!PreviewImageLoaded && UsePreviewImage)
+            {
+                PreviewImageLoaded = true;
+                _ = LoadPreviewImageAsync();
+            }
+        }
+
         public Result Result { get; }
         public int ResultProgress
         {