add StatusBox geometry and draw it

Program.cs

@@ -234,6 +234,7 @@ public class UiGeometry {
   public readonly Vector2i WindowSize;
   public readonly List<Box2i> ThumbnailBoxes = new();
   public readonly Box2i PhotoBox;
+  public readonly Box2i StatusBox;
 
   public UiGeometry() : this(MIN_WINDOW_SIZE) {}
 
@@ -248,7 +249,10 @@ public class UiGeometry {
       ThumbnailBoxes.Add(box);
     }
 
-    PhotoBox = new Box2i(0, 0, WindowSize.X - thumbnailWidth, WindowSize.Y);
+    int statusBoxHeight = 20;
+    int statusBoxPadding = 4;
+    PhotoBox = new Box2i(0, 0, WindowSize.X - thumbnailWidth, WindowSize.Y - statusBoxHeight - statusBoxPadding);
+    StatusBox = new Box2i(0, WindowSize.Y - statusBoxHeight, WindowSize.X - thumbnailWidth, WindowSize.Y);
   }
 }
 
@@ -468,6 +472,15 @@ public class Game : GameWindow {
     }
 
     Vector2i renderSize = (Vector2i) (((Vector2) active.Size) * scale);
+    // FIXME: clip by the actual PhotoBox size -- this bleeds over UI elements when zoomed in.
+    // This doesn't work -- boo.
+    // if (renderSize.X > geometry.PhotoBox.Size.X) {
+    //   renderSize.X = geometry.PhotoBox.Size.X;
+    // }
+    // if (renderSize.Y > geometry.PhotoBox.Size.Y) {
+    //   renderSize.Y = geometry.PhotoBox.Size.Y;
+    // }
+
     Vector2i center = (Vector2i) geometry.PhotoBox.Center;
     Box2i photoBox = Util.MakeBox(center.X - renderSize.X / 2, center.Y - renderSize.Y / 2, renderSize.X, renderSize.Y);
     DrawTexture(active, photoBox); 
@@ -480,9 +493,10 @@ public class Game : GameWindow {
       }
     }
 
-    DrawText(activePhoto.File, 10, 10);
+    // Draw status box.
+    DrawText(activePhoto.File, geometry.StatusBox.Min.X + 80, geometry.StatusBox.Min.Y);
     if (activePhoto.Loaded) {
-      DrawText($"zoom: {(scale * 100):F1}%", 10, 30);
+      DrawText($"{(scale * 100):F1}%", geometry.StatusBox.Min.X, geometry.StatusBox.Min.Y);
     }
 
     SwapBuffers();