Add a dialog for adding a link

src/main.py

@@ -6,6 +6,23 @@ from tkinter import ttk
 from PIL import Image, ImageTk
 
 CURRENT_PAGE = 0
+RECT_START = None
+
+
+class AddLinkDialog:
+    def __init__(self, root, rect, toc) -> None:
+        self.top = tkinter.Toplevel(root)
+        frm = ttk.Frame(self.top, padding=10)
+        frm.grid()
+
+        toc_values = list(t for _, t, _ in toc)
+
+        ttk.Label(frm, text=f"Rectangle: {rect!r}").grid(column=0, row=0, columnspan=3)
+        ttk.Label(frm, text="Target:").grid(column=0, row=1)
+        entry = ttk.Entry(frm)
+        entry.grid(column=1, row=1, columnspan=2, sticky="EW")
+        ttk.Button(frm, text="Add", command=self.top.destroy).grid(column=2, row=2)
+        ttk.Button(frm, text="Cancel", command=self.top.destroy).grid(column=3, row=2)
 
 
 def main() -> None:
@@ -47,14 +64,20 @@ def main() -> None:
         page_view.grid(column=2, row=1)
 
         def start_rect(event):
+            global RECT_START
             if event.num != 1:
                 return
             print(f"DOWN @ {event.x}/{event.y}")
+            RECT_START = (event.x, event.y)
 
         def end_rect(event):
+            global RECT_START
             if event.num != 1:
                 return
-            print(f"UP @ {event.x}/{event.y}")
+            if RECT_START is not None:
+                print(f"UP @ {event.x}/{event.y}")
+                AddLinkDialog(root, [*RECT_START, event.x, event.y], toc)
+                RECT_START = None
 
         page_view.bind("<ButtonPress>", start_rect)
         page_view.bind("<ButtonRelease>", end_rect)
@@ -81,8 +104,12 @@ def main() -> None:
             CURRENT_PAGE -= 1
             load_page(CURRENT_PAGE)
 
-        ttk.Button(frm, text="Previous", command=previous_page).grid(column=1, row=1, sticky="NS", padx=5, pady=5)
-        ttk.Button(frm, text="Next", command=next_page).grid(column=3, row=1, sticky="NS", padx=5, pady=5)
+        ttk.Button(frm, text="Previous", command=previous_page).grid(
+            column=1, row=1, sticky="NS", padx=5, pady=5
+        )
+        ttk.Button(frm, text="Next", command=next_page).grid(
+            column=3, row=1, sticky="NS", padx=5, pady=5
+        )
 
         root.bind("<Up>", lambda _: previous_page())
         root.bind("<Left>", lambda _: previous_page())
@@ -92,8 +119,7 @@ def main() -> None:
         root.bind("<Right>", lambda _: next_page())
         root.bind("<Next>", lambda _: next_page())
 
-        # Broken:
-        # root.bind("<Control-W>", lambda _: root.destroy)
+        root.bind("<Control-w>", lambda _: root.destroy())
 
         load_page(CURRENT_PAGE)