Save modified characters in project data

canvas.py

@@ -68,10 +68,36 @@ class EditorCanvas(tkinter.Canvas):
 
 
     def save_char(self):
-        pass
+        if not self.current_char_modified:
+            return
+
+        empty=True
+        for x in range(len(self.current_char_pixels)):
+            if self.current_char_pixels[x]>0:
+                empty=False
+                break
+        if empty:
+            if self.project.does_char_exist(self.current_char):
+                del(self.project.chars[chr(self.current_char)])
+            return
+
+        packed_data=[]
+        bit_counter=0
+        current_value=0
+        for pixel in self.current_char_pixels:
+            current_value|=pixel
+            if bit_counter==8:
+                packed_data.append(current_value)
+                bit_counter=0
+                current_value=0
+            current_value<<=1
+            bit_counter+=1
+
+        self.project.chars[chr(self.current_char)]=base64.b64encode(bytes(packed_data)).decode("ascii")
 
 
     def prev_glyph(self):
+        self.save_char()
         self.current_char-=1
         self.keep_current_char_in_bounds()
         self.load_char()
@@ -79,6 +105,7 @@ class EditorCanvas(tkinter.Canvas):
 
 
     def next_glyph(self):
+        self.save_char()
         self.current_char+=1
         self.keep_current_char_in_bounds()
         self.load_char()

main.py

@@ -1,6 +1,4 @@
 import os
-import numpy as np
-import cli_ui
 import unicodedata
 from exporter import export