Move zooming to View menu in menubar and use mouse scroll for changing glyphs

canvas.py

@@ -1,5 +1,4 @@
 import base64
-import platform
 import tkinter
 
 GRID_COLOR = "#808080"
@@ -25,12 +24,6 @@ class EditorCanvas(tkinter.Canvas):
         self.bind("<B2-Motion>",self.handle_move)
         self.bind("<Button-3>",self.handle_erase)
         self.bind("<B3-Motion>",self.handle_erase)
-        if platform.system()=="Windows" or platform.system()=="Darwin":
-            self.bind("<MouseWheel>",lambda event: self.handle_zoom(event.delta//120))
-        else:
-            # This will probably work only on X11
-            self.bind("<Button-4>",lambda _: self.handle_zoom(1))
-            self.bind("<Button-5>",lambda _: self.handle_zoom(-1))
 
 
     def draw(self):
@@ -88,8 +81,12 @@ class EditorCanvas(tkinter.Canvas):
         self.draw()
 
 
-    def handle_zoom(self,delta):
+    def zoom_by(self,amount):
-        self.grid_size+=delta
+        self.grid_size+=amount
+        if self.grid_size<12:
+            self.grid_size=12
+        elif self.grid_size>102:
+            self.grid_size=102
         self.width=self.project.char_res[0]*self.grid_size
         self.height=self.project.char_res[1]*self.grid_size
         self.draw()

main.py

@@ -1,4 +1,5 @@
 import os
+import platform
 import tkinter.filedialog
 import unicodedata
 
@@ -211,6 +212,18 @@ def update_glyph_preview():
     label_glyph_name.config(text=f"{name} U+{canvas_editor.current_char:04x}")
 
 
+def canvas_editor_handle_scroll(delta):
+    global canvas_editor
+    global project
+    if not project.loaded:
+        return
+    if delta>0:
+        canvas_editor.prev_glyph()
+    else:
+        canvas_editor.next_glyph()
+    update_glyph_preview()
+
+
 window=tkinter.Tk()
 window.title("fonteditor")
 window.geometry(f"{WINDOW_SIZE[0]}x{WINDOW_SIZE[1]}")
@@ -225,11 +238,21 @@ menu_file.add_command(label="Save project as",command=lambda: save_project(True)
 menu_export=tkinter.Menu(menubar,tearoff=False)
 menu_export.add_command(label="Export",command=lambda: export_project(False))
 menu_export.add_command(label="Export as",command=lambda: export_project(True))
+menu_view=tkinter.Menu(menubar,tearoff=False)
+menu_view.add_command(label="Zoom in",command=lambda: canvas_editor.zoom_by(10))
+menu_view.add_command(label="Zoom out",command=lambda: canvas_editor.zoom_by(-10))
 menubar.add_cascade(label="File",menu=menu_file)
 menubar.add_cascade(label="Export",menu=menu_export)
+menubar.add_cascade(label="View",menu=menu_view)
 
 canvas_editor=EditorCanvas(project,window,bg="black")
 canvas_editor.pack(side="left",fill="both",expand=True)
+if platform.system()=="Windows" or platform.system()=="Darwin":
+    canvas_editor.bind("<MouseWheel>",lambda event: canvas_editor_handle_scroll(event.delta))
+else:
+    # This will probably work only on X11
+    canvas_editor.bind("<Button-4>",lambda _: canvas_editor_handle_scroll(1))
+    canvas_editor.bind("<Button-5>",lambda _: canvas_editor_handle_scroll(-1))
 
 frame_controls=tkinter.Frame(window)
 frame_controls.pack(side="right")