From c953fa2b47318d885da3db2d08efdb0a308af5ab Mon Sep 17 00:00:00 2001
From: Colin McMillen <colin@semicolin.games>
Date: Fri, 4 Aug 2023 00:17:11 -0400
Subject: [PATCH] refactor CropTool.HandleInput a bit

---
 Program.cs | 55 ++++++++++++++++++++++++++++--------------------------
 1 file changed, 29 insertions(+), 26 deletions(-)

diff --git a/Program.cs b/Program.cs
index dafd6b7..a42843f 100644
--- a/Program.cs
+++ b/Program.cs
@@ -50,7 +50,7 @@ public class CameraInfo {
 }
 
 
-public enum ToolState {
+public enum ToolStatus {
   Active,
   Done,
   Canceled
@@ -58,15 +58,15 @@ public enum ToolState {
 
 
 public interface ITool {
-  ToolState HandleInput(UiGeometry geometry, KeyboardState input, MouseState mouse, Game game);
+  ToolStatus HandleInput(KeyboardState input, MouseState mouse, Game game);
   string Status();
   void Draw(UiGeometry geometry, Game game);
 }
 
 
 public class ViewTool : ITool {
-  public ToolState HandleInput(UiGeometry geometry, KeyboardState input, MouseState mouse, Game game) {
-    return ToolState.Active;
+  public ToolStatus HandleInput(KeyboardState input, MouseState mouse, Game game) {
+    return ToolStatus.Active;
   }
 
   public string Status() {
@@ -84,6 +84,7 @@ public class CropTool : ITool {
   Photo activePhoto;
   Vector2i mouseDragStart;
   Vector2i mouseDragEnd;
+  bool dragging;
   string status = "";
 
   public CropTool(Photo photo) {
@@ -92,50 +93,52 @@ public class CropTool : ITool {
     mouseDragEnd = new(photo.CropRectangle.Right, photo.CropRectangle.Bottom);
   }
 
-  public ToolState HandleInput(UiGeometry geometry, KeyboardState input, MouseState mouse, Game game) {
+  public ToolStatus HandleInput(KeyboardState input, MouseState mouse, Game game) {
     Vector2i mousePosition = (Vector2i) mouse.Position;
     Vector2i imagePosition = game.ScreenToImage(mousePosition);
 
     if (mouse.IsButtonPressed(MouseButton.Button1)) {
-      if (geometry.PhotoBox.ContainsInclusive(mousePosition)) {
+      dragging = activePhoto.CropRectangle.Contains(imagePosition.X, imagePosition.Y);
+    }
+
+    if (!dragging) {
+      if (mouse.IsButtonPressed(MouseButton.Button1)) {
         mouseDragStart = imagePosition;
       }
-    }
-
-    if (mouse.IsButtonDown(MouseButton.Button1)) {
-      if (geometry.PhotoBox.ContainsInclusive(mousePosition)) {
+      if (mouse.IsButtonDown(MouseButton.Button1)) {
         mouseDragEnd = imagePosition;
       }
+
+      var (left, right, top, bottom) = GetCrop();
+      if (left != right && top != bottom) {
+        activePhoto.CropRectangle = Rectangle.FromLTRB(left, top, right, bottom);
+      } else {
+        activePhoto.CropRectangle = Rectangle.Empty;
+      }
+    } else {
+      // FIXME
     }
 
-    var (left, right, top, bottom) = GetCrop();
-    Vector2i size = new(right - left, bottom - top);
-
-    status = $"({left}, {top}) {size.X}x{size.Y}";
-
-    Rectangle crop = Rectangle.Empty;
-    if (size.X > 0 && size.Y > 0) {
-      crop = Rectangle.FromLTRB(left, top, right, bottom);
-    }
-    activePhoto.CropRectangle = crop;
+    Rectangle r = activePhoto.CropRectangle;
+    status = $"({r.Left}, {r.Top}) {r.Width}x{r.Height}";
 
     if (input.IsKeyPressed(Keys.Enter)) {
-      return ToolState.Done;
+      return ToolStatus.Done;
     }
 
     if (input.IsKeyPressed(Keys.Escape)) {
       activePhoto.CropRectangle = Rectangle.Empty;
-      return ToolState.Canceled;
+      return ToolStatus.Canceled;
     }
 
-    return ToolState.Active;
+    return ToolStatus.Active;
   }
 
   // left, right, top, bottom
   (int, int, int, int) GetCrop() {
     // FIXME: this expects the start point in the top left and the end point
     // in the bottom right; some sign flipping needs to occur to make anchors
-    // in other direction work well.
+    // in other directions work well.
     Vector2i start = mouseDragStart;
     Vector2i end = mouseDragEnd;
     // FIXME: choose the aspect ratio based on the original image aspect ratio.
@@ -553,10 +556,10 @@ public class Game : GameWindow {
     }
 
     // Delegate input to the active tool.
-    ToolState state = activeTool.HandleInput(geometry, KeyboardState, MouseState, this);
+    ToolStatus status = activeTool.HandleInput(KeyboardState, MouseState, this);
 
     // Change back to the default tool if the active tool is done.
-    if (state != ToolState.Active) {
+    if (status != ToolStatus.Active) {
       activeTool = viewTool;
     }
   }