Update hanoi.py - bug fix, speed adjustment.

hanoi.py

@@ -13,6 +13,7 @@ GAP = 2
 CANVAS_W = 500
 CANVAS_H = 400
 gbl_speed = 0.001 # in seconds
+gbl_step = 2
 gbl_pegs = []
 gbl_pegstate = [[], [], []]
 gbl_disks = []
@@ -24,13 +25,15 @@ gbl_ready = True
 def setup_gui():
     global gbl_canvas
 
-    def get_ent(event):
+    def ent_return(event):
+        event.widget.tk_focusNext().focus()
+
+    def get_ent_focus(event):
         global gbl_num_disks
 
         try:
             new_num = int(ent_disks.get())
             gbl_num_disks = new_num
-            event.widget.tk_focusNext().focus()
             draw_init_setting()
         except Exception as err:
             ent_disks.delete(0, tk.END)
@@ -43,40 +46,44 @@ def setup_gui():
     tk.Label(tk_row, text="No. of Disks: ").pack(side=tk.LEFT)
     ent_disks = tk.Entry(tk_row, width=5)
     ent_disks.insert(0, str(gbl_num_disks))
-    ent_disks.bind('<Return>', get_ent)
+    ent_disks.bind('<Return>', ent_return)
-    ent_disks.bind('<FocusOut>', get_ent)
+    ent_disks.bind('<FocusOut>', get_ent_focus)
     ent_disks.pack(side=tk.LEFT, padx=5)
-    btn_start = tk.Button(tk_row, text="Start", width=6)
+    btn_start = tk.Button(tk_row, text="Start", width=6, command=run_hanoi)
-    btn_start.bind('<ButtonRelease-1>', run_hanoi)
+    # btn_start.bind('<ButtonRelease-1>', run_hanoi)
     btn_start.pack(side=tk.LEFT, padx=5)
-    btn_reset = tk.Button(tk_row, text="Reset", width=6)
+    btn_reset = tk.Button(tk_row, text="Reset", width=6, command=reset_hanoi)
-    btn_reset.bind('<ButtonRelease-1>', reset_hanoi)
+    # btn_reset.bind('<ButtonRelease-1>', reset_hanoi)
     btn_reset.pack(side=tk.LEFT, padx=5)
     tk.Label(tk_row, text="Speed: ").pack(side=tk.LEFT)
     tk_var = tk.StringVar(gbl_tkroot)
     tk_var.set('normal')
     tk_opt_menu = tk.OptionMenu(tk_row, tk_var,
                   *{'slow', 'normal', 'fastest'})
-    tk_opt_menu.config(width = 6)
+    tk_opt_menu.config(width=6, takefocus=True)
     tk_opt_menu.pack(side=tk.LEFT)
     tk_row.pack(side=tk.TOP, pady=5)
 
     # animation canvas
     gbl_canvas = tk.Canvas(gbl_tkroot, width=CANVAS_W, height=CANVAS_H)
     gbl_canvas.pack()
+    btn_start.focus_set()
 
     def change_speed(*args):
-        global gbl_speed
+        global gbl_speed, gbl_step
-        speed_opt = {'slow': 0.002, 'normal': 0.001, 'fastest': 0}
+        speed_opt = {'slow': 0.001, 'normal': 0.001, 'fastest': 0}
+        step_opt = {'slow': 1, 'normal': 2, 'fastest': 1}
         gbl_speed = speed_opt.get(tk_var.get())
+        gbl_step = step_opt.get(tk_var.get())
         # print(gbl_speed)
 
     tk_var.trace('w', change_speed)
 
 
-def run_hanoi(event):
+def run_hanoi():
     global gbl_ready
 
+    # t0 = time.time()
     if gbl_ready:
         gbl_ready = False
         try:
@@ -85,9 +92,11 @@ def run_hanoi(event):
             print(f'forced reset: {repr(err)}')
     else:
         pass
+    # t1 = time.time()
+    # print(t1-t0)
 
 
-def reset_hanoi(event):
+def reset_hanoi():
     draw_init_setting()
 
 
@@ -133,6 +142,7 @@ def draw_init_setting():
 
     gbl_ready = True
 
+
 def move_disk(i, a, b):
     global gbl_pegstate, gbl_canvas
     disk_num = gbl_pegstate[a].pop()
@@ -147,7 +157,7 @@ def move_disk(i, a, b):
         x1, y1, x2, y2 = gbl_canvas.bbox(disk)
         if y2 < py1:
             break
-        gbl_canvas.move(disk, 0, -1)
+        gbl_canvas.move(disk, 0, -gbl_step)
         gbl_tkroot.update_idletasks()
         gbl_tkroot.update()
         time.sleep(gbl_speed)
@@ -155,18 +165,24 @@ def move_disk(i, a, b):
     # Move to peg b
     px1, py1, px2, py2 = gbl_canvas.bbox(gbl_pegs[b])
     new_center = (px1 + px2) // 2
-    while True:
     x1, y1, x2, y2 = gbl_canvas.bbox(disk)
     center = (x1 + x2) // 2
-        if center == new_center:
+
-            break
+    while center < new_center:
-        if center > new_center:
+        gbl_canvas.move(disk, gbl_step, 0)
-            gbl_canvas.move(disk, -1, 0)
-        else:
-            gbl_canvas.move(disk, 1, 0)
         gbl_tkroot.update_idletasks()
         gbl_tkroot.update()
         time.sleep(0.7*gbl_speed) # faster
+        x1, y1, x2, y2 = gbl_canvas.bbox(disk)
+        center = (x1 + x2) // 2
+
+    while center > new_center:
+        gbl_canvas.move(disk, -gbl_step, 0)
+        gbl_tkroot.update_idletasks()
+        gbl_tkroot.update()
+        time.sleep(0.7*gbl_speed) # faster
+        x1, y1, x2, y2 = gbl_canvas.bbox(disk)
+        center = (x1 + x2) // 2
 
     # Drop down
     disk_h = y2 - y1
@@ -175,7 +191,7 @@ def move_disk(i, a, b):
         x1, y1, x2, y2 = gbl_canvas.bbox(disk)
         if y2 >= new_bottom:
             break
-        gbl_canvas.move(disk, 0, 1)
+        gbl_canvas.move(disk, 0, gbl_step)
         gbl_tkroot.update_idletasks()
         gbl_tkroot.update()
         time.sleep(gbl_speed)
@@ -188,7 +204,6 @@ def hanoi(n, a, b, c):
     Hanoi algorithm: move n pieces from a to c, using b as buffer.
     For each move, call animate() to show the move
     '''
-
     if n < 0:
         return
     hanoi(n-1, a, c, b)