fixeded error caused by int converting to float

.gitignore

@@ -2,4 +2,5 @@ __pycache__/
 exports/*
 last_path_cache.txt
 *.fontproj
-test export/
+test export/
+.vscode/

README.md

@@ -3,6 +3,4 @@
 A bitmap font editor for PolyFont in PolyGun.
 
 ## Dependencies
-- pygame
-- numpy
-- pillow
+- pillow

canvas.py

@@ -0,0 +1,176 @@
+import base64
+import platform
+import tkinter
+
+GRID_COLOR = "#808080"
+GRID_GUIDE_COLOR = (128, 128, 255)
+
+class EditorCanvas(tkinter.Canvas):
+    def __init__(self,project,*args,**kwargs):
+        super().__init__(*args,**kwargs)
+        self.project=project
+        self.grid_size = 32
+        self.current_char=33
+        self.current_char_pixels=[]
+        self.current_char_modified=False
+        self.width=0
+        self.height=0
+        self.prev_mouse_x=0
+        self.prev_mouse_y=0
+        self.view_x=0
+        self.view_y=0
+        self.bind("<B1-Motion>",self.handle_draw)
+        self.bind("<Button-1>",self.handle_draw)
+        self.bind("<Button-2>",self.handle_move_start)
+        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):
+        self.delete("all")
+
+        # draw grid
+        for x in range(self.project.char_res[0] + 1):
+            x = x * self.grid_size+self.view_x
+            self.create_line((x,self.view_y),(x,self.view_y+self.height),width=1,fill=GRID_COLOR)
+        for y in range(self.project.char_res[1] + 1):
+            y = y * self.grid_size+self.view_y
+            self.create_line((self.view_x,y),(self.view_x+self.width,y),width=1,fill=GRID_COLOR)
+
+        if self.project.does_char_exist(self.current_char) or self.current_char_modified:
+            for i in range(len(self.current_char_pixels)):
+                x=i//self.project.char_res[1]*self.grid_size+self.view_x
+                y=i%self.project.char_res[1]*self.grid_size+self.view_y
+                if self.current_char_pixels[i]>0:
+                    self.create_rectangle((x,y),(x+self.grid_size,y+self.grid_size),fill="white")
+        else:
+            self.create_line((self.view_x,self.view_y),(self.view_x+self.width,self.view_y+self.height),width=3,fill="red")
+            self.create_line((self.view_x+self.width,self.view_y),(self.view_x,self.view_y+self.height),width=3,fill="red")
+
+
+    def handle_draw(self,event):
+        pixel_pos=self.cursor_pos_to_pixel((event.x,event.y))
+        if not pixel_pos:
+            return
+        self.current_char_modified=True
+        self.project.modified=True
+        self.current_char_pixels[pixel_pos[0]*self.project.char_res[1]+pixel_pos[1]]=1
+        self.draw()
+
+
+    def handle_move_start(self,event):
+        self.prev_mouse_x=event.x
+        self.prev_mouse_y=event.y
+
+
+    def handle_move(self,event):
+        self.view_x+=event.x-self.prev_mouse_x
+        self.view_y+=event.y-self.prev_mouse_y
+        self.prev_mouse_x=event.x
+        self.prev_mouse_y=event.y
+        self.draw()
+
+
+    def handle_erase(self,event):
+        pixel_pos=self.cursor_pos_to_pixel((event.x,event.y))
+        if not pixel_pos:
+            return
+        self.current_char_modified=True
+        self.project.modified=True
+        self.current_char_pixels[pixel_pos[0]*self.project.char_res[1]+pixel_pos[1]]=0
+        self.draw()
+
+
+    def handle_zoom(self,delta):
+        self.grid_size+=delta
+        self.width=self.project.char_res[0]*self.grid_size
+        self.height=self.project.char_res[1]*self.grid_size
+        self.draw()
+
+
+    def load_char(self):
+        self.current_char_modified=False
+        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
+        pixels=self.project.decode_char(chr(self.current_char))
+        for x in range(len(pixels)):
+            self.current_char_pixels[x]=pixels[x]
+        self.draw()
+
+
+    def save_char(self):
+        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:
+            if bit_counter==8:
+                packed_data.append(current_value)
+                bit_counter=0
+                current_value=0
+            current_value|=(pixel<<(7-bit_counter))
+            bit_counter+=1
+        if bit_counter>1:
+            packed_data.append(current_value)
+
+        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()
+        self.draw()
+
+
+    def next_glyph(self):
+        self.save_char()
+        self.current_char+=1
+        self.keep_current_char_in_bounds()
+        self.load_char()
+        self.draw()
+
+
+    def cursor_pos_to_pixel(self,pos):
+        pixel_pos = ((pos[0]-self.view_x) // self.grid_size, (pos[1]-self.view_y) // self.grid_size)
+        if pixel_pos[0]<0 or pixel_pos[0]>=self.project.char_res[0] or pixel_pos[1]<0 or pixel_pos[1]>=self.project.char_res[1]:
+            return None
+        return pixel_pos
+
+
+    def keep_current_char_in_bounds(self):
+        if self.current_char<0:
+            self.current_char=0
+        elif self.current_char>99999:
+            self.current_char=99999
+
+
+    def after_project_load(self):
+        self.width=self.project.char_res[0]*self.grid_size
+        self.height=self.project.char_res[1]*self.grid_size
+        self.current_char_pixels=[0 for _ in range(self.project.char_res[0]*self.project.char_res[1])]
+        self.load_char()
+

cli_ui.py

@@ -1,176 +0,0 @@
-import os
-from tkinter import filedialog
-import json
-import base64
-import numpy as np
-
-
-def get_choice(text, choices):
-    line = "=" * len(text)
-    print(line)
-    print(text)
-    print(line)
-    
-    choices_len = len(choices)
-
-    for i, choice in enumerate(choices):
-        print(f"{i+1}. {choice}")
-
-    while True:
-
-        try:
-            choice = int(input(f"> "))
-        except ValueError:
-            print("\nInvalid input! Input must be a number.")
-            continue
-
-        if choice < 1 or choice > choices_len:
-            print(f"\nInvalid input! Choose number from the list.")
-            continue
-
-        return choice - 1
-
-
-def get_int_input(text, min_val=None, max_val=None):
-    while True:
-        try:
-            value = int(input(text))
-        except ValueError:
-            print("\nInvalid input! Input must be a number.")
-            continue
-
-        if (min_val is not None and value < min_val) or (max_val is not None and value > max_val):
-            print(f"\nInvalid input! Input must be between {min_val} and {max_val}.")
-            continue
-
-        return value
-
-
-
-def key_tips():
-    print("\n======== CONTROLS ========")
-
-    print("Scroll - Select character")
-    print("Mouse click/drag - Draw")
-    print("Delete - Remove character")
-    print("G - Toggle grid")
-    print("E - Export font")
-    print("P - Reprint this controls info")
-
-    print("\nBlank characters are automatically removed.")
-    #print("Type any character into the console and press enter at any time to jump to it.")
-
-    print("============================\n")
-
-
-
-def cli_main():
-    while True:
-
-        choices = ["Create new font", "Open font project"]
-
-        # if last_path_cache.txt exists, read it
-        try:
-            with open("last_path_cache.txt", "r") as file:
-                last_path = file.read()
-                choices.append(f"Open recent project ({os.path.basename(last_path)})")
-        except FileNotFoundError:
-            last_path = None
-
-
-
-        choice = get_choice(
-            "What do you want to do?" + (" No recently opened project found." if last_path is None else ""),
-            choices
-        )
-        
-        #choice = 2
-
-
-        # create new font project
-        if choice == 0:
-            print("\n" + "=" * 30)
-
-            project_data = {
-                "char_width": get_int_input("Enter character width: ", min_val=2),
-                "char_height": get_int_input("Enter character height: ", min_val=2),
-                "chars": {}
-            }
-
-            # show file save dialog
-            file_path = filedialog.asksaveasfilename(
-                title="Save font project",
-                filetypes=[("Font project (json)", "*.fontproj")],
-                defaultextension=".fontproj"
-            )
-
-            if file_path == "":
-                print("\nCanceled.\n")
-                continue
-
-            # save project data to file
-            with open(file_path, "w") as f:
-                json.dump(project_data, f, indent=4)
-
-            # save last path to cache
-            with open("last_path_cache.txt", "w") as f:
-                f.write(file_path)
-
-
-        # open existing font project
-        elif choice == 1:
-            file_path = filedialog.askopenfilename(
-                title="Open font project",
-                filetypes=[("Font project (json)", "*.fontproj")]
-            )
-
-            if file_path == "":
-                print("\nCanceled.\n")
-                continue
-
-            # save last path to cache
-            with open("last_path_cache.txt", "w") as f:
-                f.write(file_path)
-
-            with open(file_path, "r") as f:
-                project_data = json.load(f)
-
-
-        # open last project
-        elif choice == 2:
-            file_path = last_path
-
-            try:
-                with open(file_path, "r") as f:
-                    project_data = json.load(f)
-            except FileNotFoundError:
-                print("\nCouldn't open last project. File not found.\n")
-                continue
-
-
-        # process project data if opened existing project
-        if choice != 0:
-            # reverse the packed characters
-            unpacked_chars = {}
-            for key, value in project_data["chars"].items():
-                # decode from base64
-                decoded_data = base64.b64decode(value.encode("utf-8"))
-                # unpackbits
-                unpacked_data = np.unpackbits(np.frombuffer(decoded_data, dtype=np.uint8))
-                # remove padding
-                unpacked_data = unpacked_data[:project_data["char_width"] * project_data["char_height"]]
-                # reshape into original shape
-                unpacked_data = unpacked_data.reshape(project_data["char_width"], project_data["char_height"])
-                # store unpacked character
-                unpacked_chars[key] = unpacked_data.astype(bool)
-
-            project_data["chars"] = unpacked_chars
-
-
-
-        print("\n" + "=" * 30)
-        print(f"Font resolution: {project_data['char_width']}x{project_data['char_height']}")
-
-        key_tips()
-
-        return project_data, file_path

exporter.py

@@ -1,69 +0,0 @@
-from tkinter import filedialog
-from PIL import Image
-import numpy as np
-
-
-def export(char_res, chars):
-
-    export_path = filedialog.askdirectory(
-        title="Choose folder where exported pages will be saved."
-    )
-
-    if export_path == "":
-        print("\nExport canceled.\n")
-        return
-
-
-    char_res = np.array(char_res, dtype=np.uint16)
-    chars = tuple(chars.items())
-
-
-    # there will be 256 characters per page
-
-    last_char_idx = len(chars) - 1
-
-    page_res = char_res * 16
-
-    page = 0
-    page_char_x = 0
-    page_char_y = 0
-    for char_idx, char in enumerate(chars):
-        if page_char_x == 0 and page_char_y == 0:
-            page_arr = np.zeros(page_res, dtype=bool)
-
-            char_map_string = ""
-
-        char_string, char_bitmap = char
-
-
-        # put char_bitmap onto page_img at correct position
-        page_arr[
-            page_char_x * char_res[0] : (page_char_x + 1) * char_res[0],
-            page_char_y * char_res[1] : (page_char_y + 1) * char_res[1]
-        ] = char_bitmap
-
-        char_map_string += char_string
-
-        page_char_x += 1
-
-        if page_char_x == 16:
-            page_char_x = 0
-            page_char_y += 1
-
-        if page_char_y == 16 or char_idx == last_char_idx:
-            ## save page
-
-            # numpy array to 1 bit image
-            page_img = Image.fromarray(page_arr.T * 255).convert("1")
-
-            # save page
-            page_img.save(f"{export_path}/page_{page}.png")
-
-            # save char map
-            with open(f"{export_path}/page_{page}.txt", "w", encoding="utf-32") as f:
-                f.write(char_map_string)
-
-            page += 1
-            page_char_y = 0
-            
-    print("\nExport finished.\n")

main.py

@@ -1,293 +1,262 @@
 import os
-os.environ["PYGAME_HIDE_SUPPORT_PROMPT"] = "1"
-import pygame
-import pygame.freetype
-import numpy as np
-import cli_ui
+import tkinter.filedialog
 import unicodedata
-import json
-import base64
-from exporter import export
+
+from canvas import *
+from project import *
 
 ##### CONFIG #####
 
-# heigh of guide lines from the top of font pixel grid
-ascender_line = 10
-descender_line = 20
-
-
-
-window_size = (
-    (1280, 720),
-    (1920, 1019)
+WINDOW_SIZE = (
+    (1280,720),
+    (1920,1019)
 )[0]
 
-# this is just a hard limit additionaly limited by the refresh rate of the monitor (vsync)
-fps_limit = 240
-
-
-grid_color = (128,) * 3
-grid_guide_color = (128, 128, 255)
 cross_color = (255, 60, 25)
 pixel_color = (255,) * 3
 
-
 ##################
 
+project=Project()
+
+def button_create_project_click(subwindow,w,h):
+    try:
+        width=int(w)
+    except ValueError as e:
+        tkinter.messagebox.showerror("Creating new project", f"Invalid value {w}: {e}")
+        return
+    try:
+        height=int(h)
+    except ValueError as e:
+        tkinter.messagebox.showerror("Creating new project", f"Invalid value {h}: {e}")
+        return
+    project.chars={}
+    project.char_res=(width,height)
+    project.loaded=True
+    canvas_editor.after_project_load()
+    canvas_editor.draw()
+    update_glyph_preview()
+    subwindow.destroy()
 
 
-proj_data, proj_path = cli_ui.cli_main()
-chars = proj_data["chars"]
+def menu_file_new_project_click():
+    global window
+    if project.modified and not tkinter.messagebox.askyesno("Creating new project","You have unsaved changes, are you sure?"):
+        return
+    subwindow=tkinter.Toplevel(window)
+    subwindow.title("New project")
 
-char_res = (proj_data["char_width"], proj_data["char_height"])
+    label_width=tkinter.Label(subwindow,text="Character width")
+    label_width.pack(side="top")
+
+    entry_width=tkinter.Entry(subwindow,validate="all",validatecommand=((subwindow.register(number_only_validate)),"%P"))
+    entry_width.pack(side="top",fill="x",padx=5)
+
+    label_height=tkinter.Label(subwindow,text="Character height")
+    label_height.pack(side="top")
+
+    entry_height=tkinter.Entry(subwindow,validate="all",validatecommand=((subwindow.register(number_only_validate)),"%P"))
+    entry_height.pack(side="top",fill="x",padx=5)
+
+    button_create=tkinter.Button(subwindow,text="Create",command=lambda: button_create_project_click(subwindow,entry_width.get(),entry_height.get()))
+    button_create.pack(side="bottom",fill="x",padx=5)
 
 
-
-# pygame init
-pygame.init()
-window = pygame.display.set_mode(window_size, flags=pygame.SCALED, vsync=1)
-clock = pygame.time.Clock()
-font = pygame.freetype.SysFont("Arial", 32)
-alt_font = pygame.freetype.SysFont("monogramextended", 32)
+def open_project(file_path):
+    try:
+        project.load(file_path)
+    except AttributeError as e:
+        tkinter.messagebox.showerror("Opening project",f"Project '{file_path}' is invalid: {e}")
+    except IOError as e:
+        tkinter.messagebox.showerror("Opening project",f"Failed to open project '{file_path}': {e}")
+    finally:
+        canvas_editor.after_project_load()
+        canvas_editor.draw()
+        update_glyph_preview()
 
 
+def menu_file_open_project_click():
+    global project
+    global canvas_editor
 
-
-pixel_size = (window_size[1]-1) / char_res[1]
-canva_width = pixel_size * char_res[0]
-
-
-
-def cursor_pos_to_pixel(pos):
-    pixel_pos = (int(pos[0] // pixel_size), int(pos[1] // pixel_size))
-
-    if pixel_pos[0] < 0 or pixel_pos[1] < 0 or pixel_pos[0] >= char_res[0] or pixel_pos[1] >= char_res[1]:
-        return None
-
-    return pixel_pos
-
-
-
-#d_time = 1 / fps_limit
-
-is_grid = True
-
-char_num = 33
-
-def check_char_exist(char_num):
-    return chr(char_num) in chars
-
-does_char_exist = check_char_exist(char_num)
-
-force_deleted = False
-
-# main loop
-while True:
-    for event in pygame.event.get():
-        if event.type == pygame.QUIT:
-            pygame.quit()
-            quit()
-
-        elif event.type == pygame.MOUSEWHEEL:
-            char_num += event.y * -1
-
-            if char_num < 0:
-                char_num = 0
-            elif char_num > 99999:
-                char_num = 99999
-
-            does_char_exist = check_char_exist(char_num)
-
-
-        elif event.type == pygame.KEYDOWN:
-
-            # delete char
-            if event.key == pygame.K_DELETE:
-                if does_char_exist:
-                    del chars[chr(char_num)]
-                    does_char_exist = False
-                    force_deleted = True
-
-            # toggle grid
-            if event.key == pygame.K_g:
-                is_grid = not is_grid
-
-            # export font
-            elif event.key == pygame.K_e:
-                export(char_res, chars)
-
-            # print key tips
-            elif event.key == pygame.K_p:
-                cli_ui.key_tips()
-
-
-        # initialize current stroke
-        elif event.type == pygame.MOUSEBUTTONDOWN and event.button == 1:
-            pixel_pos = cursor_pos_to_pixel(pygame.mouse.get_pos())
-            # if char is drawable at current position
-            if pixel_pos is not None:
-                # create char dictionary entry if it does not exist
-                if not does_char_exist:
-                    chars[chr(char_num)] = np.zeros(char_res, dtype=bool)
-                    does_char_exist = True
-
-                paint_color = not chars[chr(char_num)][pixel_pos]
-
-        # save at the end of the stroke
-        elif (event.type == pygame.MOUSEBUTTONUP and event.button == 1) or force_deleted:
-            force_deleted = False
-
-            ## packbit all chars
-
-            # calculate the number of bits needed to pad char array to a multiple of 8
-            remainder = char_res[0] * char_res[1] % 8
-            padding = (8 - remainder) % 8
-
-
-            packed_chars = {}
-            for key, value in chars.items():
-                # reshape into 1D array
-                new_data = value.reshape(-1)
-                # pad
-                new_data = np.pad(new_data, (0, padding), mode="constant")
-                # reshape the padded array into a 2D array with 8 columns
-                new_data = new_data.reshape(-1, 8)
-                # packbits
-                new_data = np.packbits(new_data, axis=1).tobytes()
-                # convert to base64
-                new_data = base64.b64encode(new_data).decode("utf-8")
-                
-                packed_chars[key] = new_data
-
-            proj_data["chars"] = packed_chars
-
-            with open(proj_path, "w", encoding="utf-8") as f:
-                json.dump(proj_data, f, indent=4, ensure_ascii=False)
-
-            print("Autosaved project.")
-
-
-
-    
-    # perform drawing
-    if pygame.mouse.get_pressed()[0] and does_char_exist:
-        pixel_pos = cursor_pos_to_pixel(pygame.mouse.get_pos())
-
-        if pixel_pos is not None:
-            chars[chr(char_num)][pixel_pos] = paint_color
-
-            # if all pixels are off, delete char
-            if not np.any(chars[chr(char_num)]):
-                del chars[chr(char_num)]
-                does_char_exist = False
-
-
-    window.fill((0, 0, 0))
-
-
-    if does_char_exist:
-        current_char_array = chars[chr(char_num)]
-        # draw pixels from current_char_array
-        for y in range(char_res[1]):
-            for x in range(char_res[0]):
-                if current_char_array[x, y]:
-                    pygame.draw.rect(
-                        window,
-                        pixel_color,
-                        (
-                            x * pixel_size,
-                            y * pixel_size,
-                            pixel_size,
-                            pixel_size
-                        )
-                    )
-
-
-
-    if is_grid:
-        # draw grid
-        for x in range(char_res[0] + 1):
-            x = x * pixel_size
-            pygame.draw.line(
-                window,
-                grid_color,
-                (x, 0),
-                (x, window_size[1]),
-            )
-
-        for y in range(char_res[1] + 1):
-            real_y = y * pixel_size
-            pygame.draw.line(
-                window,
-                grid_guide_color if (y == ascender_line or y == descender_line) else grid_color,
-                (0, real_y),
-                (canva_width, real_y),
-            )
-
-
-    # draw char num
-    font.render_to(
-        window,
-        (canva_width + 30, 30),
-        f"dec: {char_num}",
-        (255, 255, 255),
-        size=64,
+    file_path = tkinter.filedialog.askopenfilename(
+        title="Open font project",
+        filetypes=[("Font project (json)", "*.fontproj")]
     )
+    if file_path == "" or file_path==():
+        return
+
+    # save last path to cache
+    with open("last_path_cache.txt", "w") as f:
+        f.write(file_path)
+
+    open_project(file_path)
 
 
-    # draw char
-    font.render_to(
-        window,
-        (canva_width + 30, 100),
-        chr(char_num),
-        (255, 255, 255),
-        size=150,
-    )
-
-    # draw alternate font char
-    alt_font.render_to(
-        window,
-        (canva_width + 200, 100),
-        chr(char_num),
-        (255, 255, 255),
-        size=256,
-    )
+def menu_file_open_last_project_click():
+    try:
+        cache=open("last_path_cache.txt","r")
+        file_path=cache.read()
+        cache.close()
+        open_project(file_path)
+    except IOError:
+        tkinter.messagebox.showerror("Opening last project","Failed to load last project cache")
 
 
-    # draw char name
-    font.render_to(
-        window,
-        (canva_width + 30, 280),
-        unicodedata.name(chr(char_num), "unknown"),
-        (255, 255, 255),
-        size=16,
-    )
+def save_project(ask):
+    global canvas_editor
+    global project
 
+    if not project.loaded:
+        return
 
-    # draw a red cross if curren char does not exist
-    if not does_char_exist:
-        pygame.draw.line(
-            window,
-            cross_color,
-            (0, 0),
-            (canva_width, window_size[1]),
-            7
+    path=None
+    if project.path and not ask:
+        path=project.path
+    else:
+        # show file save dialog
+        path=tkinter.filedialog.asksaveasfilename(
+            title="Save font project",
+            filetypes=[("Font project (json)", "*.fontproj")],
+            defaultextension=".fontproj"
         )
-        pygame.draw.line(
-            window,
-            cross_color,
-            (0, window_size[1]),
-            (canva_width, 0),
-            7
+        if path=="" or path==():
+            return
+
+    # save last path to cache
+    with open("last_path_cache.txt", "w") as f:
+        f.write(path)
+
+    canvas_editor.save_char()
+    try:
+        project.save(path)
+    except IOError as e:
+        tkinter.messagebox.showerror("Saving project",f"Failed to save project '{path}': {e}")
+
+
+def export_project(ask):
+    if not project.loaded:
+        return
+
+    path=None
+    if project.export_path and not ask:
+        path=project.export_path
+    else:
+        path = tkinter.filedialog.askdirectory(
+            title="Choose folder where exported pages will be saved"
         )
+        if path=="" or path==():
+            return
+
+    canvas_editor.save_char()
+    try:
+        project.export(path)
+    except IOError as e:
+        tkinter.messagebox.showerror("Exporting project",f"Failed to export project: {e}")
 
 
+def button_prev_glyph_click():
+    global canvas_editor
+    global project
+    if not project.loaded:
+        return
+    canvas_editor.prev_glyph()
+    update_glyph_preview()
+
+def button_next_glyph_click():
+    global canvas_editor
+    global project
+    if not project.loaded:
+        return
+    canvas_editor.next_glyph()
+    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()
 
 
-    font.render_to(window, (10, 10), f"FPS: {clock.get_fps():.2f}", (255, 255, 255), size=16)
+def number_only_validate(val):
+    return val.isdigit()
 
-    pygame.display.update()
-    clock.tick(fps_limit)
-    #d_time = clock.tick(fps_limit) / 1000
+
+def hex_only_validate(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():
+    global canvas_editor
+    global canvas_preview
+    global label_glyph_name
+    canvas_preview.delete("all")
+    canvas_preview.create_text((50,100),text=chr(canvas_editor.current_char),fill="white",font="tkDefaultFont 70")
+    name=unicodedata.name(chr(canvas_editor.current_char),"unknown")
+    label_glyph_name.config(text=f"{name} U+{canvas_editor.current_char:04x}")
+
+
+window=tkinter.Tk()
+window.title("fonteditor")
+window.geometry(f"{WINDOW_SIZE[0]}x{WINDOW_SIZE[1]}")
+
+menubar=tkinter.Menu(window)
+menu_file=tkinter.Menu(menubar,tearoff=False)
+menu_file.add_command(label="New project",command=menu_file_new_project_click)
+menu_file.add_command(label="Open project",command=menu_file_open_project_click)
+menu_file.add_command(label="Open last project",command=menu_file_open_last_project_click)
+menu_file.add_command(label="Save project",command=lambda: save_project(False))
+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))
+menubar.add_cascade(label="File",menu=menu_file)
+menubar.add_cascade(label="Export",menu=menu_export)
+
+canvas_editor=EditorCanvas(project,window,bg="black")
+canvas_editor.pack(side="left",fill="both",expand=True)
+
+frame_controls=tkinter.Frame(window)
+frame_controls.pack(side="right")
+
+canvas_preview=tkinter.Canvas(frame_controls,width=100,height=200,bg="black")
+canvas_preview.pack(side="top")
+
+label_glyph_name=tkinter.Label(frame_controls)
+label_glyph_name.pack(side="top")
+
+frame_nav=tkinter.Frame(frame_controls)
+frame_nav.pack(side="top",pady=10)
+
+button_prev_glyph=tkinter.Button(frame_nav,width=10,text="Previous",command=button_prev_glyph_click)
+button_prev_glyph.pack(side="left")
+
+button_next_glyph=tkinter.Button(frame_nav,width=10,text="Next",command=button_next_glyph_click)
+button_next_glyph.pack(side="left")
+
+frame_glyph_id=tkinter.Frame(frame_controls)
+frame_glyph_id.pack(side="top",pady=10)
+
+entry_glyph_id=tkinter.Entry(frame_glyph_id,validate="all",validatecommand=((window.register(hex_only_validate)),"%P"))
+entry_glyph_id.pack(side="left")
+
+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)
+window.mainloop()

project.py

@@ -0,0 +1,101 @@
+import base64
+import json
+import PIL.Image
+
+def create_zeroed_array(length):
+    output=[]
+    for _ in range(length):
+        output.append(0)
+    return output
+
+class Project:
+    def __init__(self):
+        self.chars={}
+        self.char_res=(0,0)
+        self.path=None
+        self.export_path=None
+        self.loaded=False
+        self.modified=False
+
+
+    def load(self,path):
+        with open(path, "r") as f:
+            project_data = json.load(f)
+            if not "char_width" in project_data or not "char_height" in project_data:
+                raise AttributeError("Character metrics information not found")
+            if not isinstance(project_data["char_width"],int) or not isinstance(project_data["char_height"],int):
+                raise AttributeError("Invalid character metrics type, expected int")
+            if not "chars" in project_data:
+                raise AttributeError("Character data not found")
+            if not isinstance(project_data["chars"],dict):
+                raise AttributeError("Invalid character data type, expected object")
+            self.chars=project_data["chars"]
+            self.char_res=(project_data["char_width"],project_data["char_height"])
+            self.path=path
+            self.loaded=True
+
+
+    def save(self,path):
+        # save project data to file
+        with open(path, "w") as f:
+            json.dump({
+                "char_width": self.char_res[0],
+                "char_height": self.char_res[1],
+                "chars": self.chars
+            }, f, indent=4)
+        self.path=path
+        self.loaded=True
+
+
+    def export(self,path):
+        chars = tuple(self.chars.items())
+
+        # there will be 256 characters per page
+        last_char_idx = len(chars) - 1
+
+        page_res = (self.char_res[0] * 16,self.char_res[1] * 16)
+        pages={}
+
+        for char_idx, char in enumerate(chars):
+            char_id=ord(char[0])
+            page=char_id//256
+            char_offset_in_page=char_id-page*256
+            if not page in pages:
+                pages[page] = create_zeroed_array(page_res[0]*page_res[1])
+
+            char_bitmap=self.decode_char(char[0])
+            char_x=char_offset_in_page%16*self.char_res[0]
+            char_y=char_offset_in_page//16*self.char_res[1]
+
+            # put char_bitmap onto page_img at correct position
+            for i in range(len(char_bitmap)):
+                x=i//self.char_res[1]+char_x
+                y=i%self.char_res[1]+char_y
+                pages[page][y*page_res[0]+x]=char_bitmap[i]
+
+        ## save page
+        for page,page_data in pages.items():
+            for x in range(len(page_data)):
+                page_data[x]*=255
+            page_img = PIL.Image.frombytes("L",page_res,bytes(page_data))
+            page_img.save(f"{path}/page_{page}.png")
+
+        self.export_path=path
+
+
+    def decode_char(self,char):
+        result=[0 for _ in range(self.char_res[0]*self.char_res[1])]
+        pixels=base64.b64decode(self.chars[char].encode("ascii"))
+        pixel_index=0
+        for pixel in pixels:
+            if pixel_index>=len(result):
+                break
+            for x in range(8):
+                if pixel_index>=len(result):
+                    break
+                result[pixel_index]=(pixel>>(7-x))&1
+                pixel_index+=1
+        return result
+
+    def does_char_exist(self,c):
+        return chr(c) in self.chars