allow keyboard repeat for moving between thumbnails

Program.cs

@@ -6,6 +6,7 @@ using OpenTK.Windowing.GraphicsLibraryFramework;
 using System.Runtime.CompilerServices;
 // https://docs.sixlabors.com/api/ImageSharp/SixLabors.ImageSharp.Image.html
 using Image = SixLabors.ImageSharp.Image;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 
 namespace SemiColinGames;
 
@@ -17,6 +18,7 @@ public class CameraInfo {
   }
 
   public static readonly CameraInfo NIKON_D7000 = new(new Vector2i(4928, 3264));
+  public static readonly CameraInfo CANON_EOS_R6M2 = new(new Vector2i(6000, 4000));
   public static readonly CameraInfo IPHONE_12_MINI = new(new Vector2i(4032, 3024));
 }
 
@@ -142,11 +144,17 @@ public class Texture : IDisposable {
 
   public Texture(Image<Rgba32> image) {
     Size = new Vector2i(image.Width, image.Height);
+    Console.WriteLine("----------------------------------");
     Console.WriteLine($"image loaded: {Size}");
 
-    //foreach (IExifValue exif in image.Metadata.ExifProfile.Values) {
-    //  Console.WriteLine($"{exif.Tag} : {exif.GetValue()}");
-    //}
+    ExifProfile? exifs = image.Metadata.ExifProfile;
+    if (exifs != null) {
+      foreach (IExifValue exif in exifs.Values) {
+        if (exif.Tag.ToString() == "Model") {
+          Console.WriteLine($"{exif.Tag}: {exif.GetValue()}");
+        }
+      }
+    }
     byte[] pixelBytes = new byte[Size.X * Size.Y * Unsafe.SizeOf<Rgba32>()];
     image.CopyPixelDataTo(pixelBytes);
     image.Dispose();
@@ -187,7 +195,7 @@ public class Texture : IDisposable {
 
 public class UiGeometry {
   public static Vector2i MIN_WINDOW_SIZE = new(640, 480);
-  private static CameraInfo activeCamera = CameraInfo.NIKON_D7000;
+  private static CameraInfo activeCamera = CameraInfo.CANON_EOS_R6M2;
 
   public readonly Vector2i WindowSize;
   public readonly List<Box2i> ThumbnailBoxes = new();
@@ -198,7 +206,7 @@ public class UiGeometry {
   public UiGeometry(Vector2i windowSize) {
     WindowSize = windowSize;
 
-    int numThumbnails = 12;
+    int numThumbnails = 20;
     int thumbnailHeight = WindowSize.Y / numThumbnails;
     int thumbnailWidth = (int) 1.0 * thumbnailHeight * activeCamera.Resolution.X / activeCamera.Resolution.Y;
     for (int i = 0; i < numThumbnails; i++) {
@@ -223,6 +231,10 @@ public class Game : GameWindow {
 
   UiGeometry geometry = new();
 
+  // Input handling.
+  long downTimer = Int64.MaxValue;
+  long upTimer = Int64.MaxValue;
+
   // Four points, each consisting of (x, y, z, tex_x, tex_y).
   float[] vertices = new float[20];
 
@@ -242,9 +254,16 @@ public class Game : GameWindow {
 
   protected override void OnUpdateFrame(FrameEventArgs e) {
     base.OnUpdateFrame(e);
+    long now = DateTime.Now.Ticks;
 
     KeyboardState input = KeyboardState;
 
+    // Close when Escape is pressed.
+    if (input.IsKeyDown(Keys.Escape)) {
+      Close();
+    }
+
+    // Look for mouse clicks on thumbnails.
     if (MouseState.IsButtonPressed(0)) {
       for (int i = 0; i < geometry.ThumbnailBoxes.Count; i++) {
         Box2i box = geometry.ThumbnailBoxes[i];
@@ -256,17 +275,26 @@ public class Game : GameWindow {
       }
     }
 
-    if (input.IsKeyDown(Keys.Escape)) {
-      Close();
+
+    // Track keyboard repeat times for advancing up/down.
+    if (!input.IsKeyDown(Keys.Down)) {
+      downTimer = Int64.MaxValue;
     }
 
-    if (input.IsKeyPressed(Keys.Down)) {
+    if (!input.IsKeyDown(Keys.Up)) {
+      upTimer = Int64.MaxValue;
+    }
+
+    // FIXME: make a proper Model class for tracking the state of the controls?
+    if (input.IsKeyPressed(Keys.Down) || now > downTimer) {
       if (textureIndex < textures.Count - 1) {
+        downTimer = now + 10000 * 200;
         textureIndex++;
       }
     }
-    if (input.IsKeyPressed(Keys.Up)) {
+    if (input.IsKeyPressed(Keys.Up) || now > upTimer) {
       if (textureIndex > 0) {
+        upTimer = now + 10000 * 200;
         textureIndex--;
       }
     }
@@ -306,11 +334,15 @@ public class Game : GameWindow {
     GL.VertexAttribPointer(texCoordLocation, 2, VertexAttribPointerType.Float, false, 5 * sizeof(float), 3 * sizeof(float));
 
     // Load textures from JPEGs.
-    string[] files = Directory.GetFiles(@"c:\users\colin\desktop\photos-test\");
+    // string[] files = Directory.GetFiles(@"c:\users\colin\desktop\photos-test\");
+    string[] files = Directory.GetFiles(@"c:\users\colin\pictures\photos\2023\07\14\");
     foreach (string file in files) {
       if (file.ToLower().EndsWith(".jpg")) {
         Image<Rgba32> image = Image.Load<Rgba32>(file);
         textures.Add(new Texture(image));
+        if (textures.Count > 10) {
+          break;
+        }
       }
     }
   }