Implement glyph search

canvas.py

@@ -87,6 +87,7 @@ class EditorCanvas(tkinter.Canvas):
         if not self.project.does_char_exist(self.current_char):
             for x in range(len(self.current_char_pixels)):
                 self.current_char_pixels[x]=0
+            self.draw()
             return
         base64_data=self.project.chars[chr(self.current_char)]
         pixels=base64.b64decode(base64_data.encode("ascii"))

main.py

@@ -88,8 +88,29 @@ def button_next_glyph_click():
     update_glyph_preview()
 
 
+def button_glyph_search_click():
+    global canvas_editor
+    global entry_glyph_id
+    global project
+    if not project.loaded:
+        return
+    code=entry_glyph_id.get()
+    canvas_editor.save_char()
+    try:
+        canvas_editor.current_char=int(code,base=16)
+    except ValueError as e:
+        tkinter.messagebox.showerror("Searching glyph", f"Invalid hex value {code}: {e}")
+    finally:
+        canvas_editor.keep_current_char_in_bounds()
+        canvas_editor.load_char()
+        update_glyph_preview()
+
+
 def number_only_validate(val):
-    return str.isdigit(val) or val==""
+    for x in val:
+        if not x.isdigit() and (ord(x)<ord("a") or ord(x)>ord("f")) and (ord(x)<ord("A") or ord(x)>ord("F")):
+            return False
+    return True
 
 
 def update_glyph_preview():
@@ -140,7 +161,7 @@ frame_glyph_id.pack(side="top",pady=10)
 entry_glyph_id=tkinter.Entry(frame_glyph_id,validate="all",validatecommand=((window.register(number_only_validate)),"%P"))
 entry_glyph_id.pack(side="left")
 
-button_glyph_search=tkinter.Button(frame_glyph_id,width=10,text="Search")
+button_glyph_search=tkinter.Button(frame_glyph_id,width=10,text="Search",command=button_glyph_search_click)
 button_glyph_search.pack(side="left")
 
 window.config(menu=menubar)