Implement new project creation

canvas.py

@@ -54,10 +54,11 @@ class EditorCanvas(tkinter.Canvas):
 
 
     def handle_draw(self,event):
-        self.current_char_modified=True
         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()
 

main.py

@@ -19,6 +19,49 @@ 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()
+
+
+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")
+
+    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)
+
+
 def menu_file_open_project_click():
     global project
     global canvas_editor
@@ -47,21 +90,26 @@ def menu_file_open_project_click():
 
 
 def menu_file_save_project_click():
+    global canvas_editor
     global project
 
+    if not project.loaded:
+        return
+
     path=None
-    if project.loaded:
+    if project.path:
         path=project.path
     else:
         # show file save dialog
-        path=filedialog.asksaveasfilename(
+        path=tkinter.filedialog.asksaveasfilename(
             title="Save font project",
             filetypes=[("Font project (json)", "*.fontproj")],
             defaultextension=".fontproj"
         )
-        if path=="" or file_path==():
+        if path=="" or path==():
             return
 
+    canvas_editor.save_char()
     try:
         project.save(path)
     except IOError as e:
@@ -107,6 +155,10 @@ def button_glyph_search_click():
 
 
 def number_only_validate(val):
+    return val.isdigit()
+
+
+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
@@ -129,6 +181,7 @@ 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="Save project",command=menu_file_save_project_click)
 menu_file.add_command(label="Save project as",command=menu_file_save_project_as_click)
@@ -158,7 +211,7 @@ 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(number_only_validate)),"%P"))
+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)

project.py

@@ -6,6 +6,7 @@ class Project:
         self.char_res=(0,0)
         self.path=None
         self.loaded=False
+        self.modified=False
 
 
     def load(self,path):