我創(chuàng)建了一個按鈕，如果按下該按鈕，它會指向檢查功能，這是對用戶輸入小部件的一種驗證檢查。如果用戶輸入的名字包含字母以外的任何內(nèi)容，它應(yīng)該在坐標 (200, 500) 處給出無效檢查消息，如果姓氏有這樣的錯誤，則應(yīng)該在 (200, 700) 處給出一條消息 - - 否則屏幕應(yīng)進入下一個屏幕。但是，如果我輸入一個錯誤的條目和一個正確的條目，盡管消息出現(xiàn)在正確的位置 - 當我現(xiàn)在將錯誤的條目正確和正確的條目輸入錯誤時，消息不會從一個位置消失，而是保持原樣并且另一條消息出現(xiàn)在另一個位置（現(xiàn)在有 2 條消息，即使只有一個條目是錯誤的）如果這令人困惑，我很抱歉，但簡而言之，我的目標是該消息應(yīng)該只出現(xiàn)在條目出錯的坐標上，并在條目被更正后消失。我應(yīng)該如何更改我的代碼以確保這一點？def check(FName_Entry, LName_Entry):if not FName_Entry.get().isalpha(): errormsg = Message(root, text = 'Invalid entry', anchor = CENTER) canvas.create_window(200, 500, anchor=NW, window = errormsg) #messagebox.showerror('Only letters', 'Only letters are allowed!')if not LName_Entry.get().isalpha(): errormsg2 = Message(root, text='Invalid entry', anchor=CENTER) canvas.create_window(200, 700, anchor=NW, window=errormsg2)if FName_Entry.get().isalpha() and LName_Entry.get().isalpha(): canvas.delete("all"). . . .Next_button = Button(root, text="Next", anchor=CENTER, command=lambda: check(FName_Entry, LName_Entry)) Next_button.configure(width=10, bg="black", fg="blue", border=10) canvas.create_window(920, 450, anchor=NW, window=Next_button)
1 回答
慕無忌1623718
TA貢獻1744條經(jīng)驗 獲得超4個贊
我假設(shè)這是您在選擇您是用戶還是司機后到達的部分。如果我們堅持我在你的另一篇文章中給你的例子：
新配置.py
from dataclasses import dataclass, asdict
#to make things more complicated and force you to get better
#create a dataclass of default properties
@dataclass
class Button_dc:
bg: str = "white"
fg: str = "gray20"
font: str = 'Calibri 14 bold'
border:int = 10
#make a dict instance of the dataclass
DefaultButton = asdict(Button_dc())
#make a slightly different instance
UserRoleButton = asdict(Button_dc(font='Calibri 24 bold'))
@dataclass
class Label_dc:
bg: str = "steel blue"
fg: str = "gray20"
font: str = 'Calibri 14 bold'
DefaultLabel = asdict(Label_dc())
@dataclass
class Entry_dc:
bg: str = "white"
fg: str = "gray20"
font: str = 'Calibri 14 bold'
width: int = 30
DefaultEntry = asdict(Entry_dc())
@dataclass
class Message_dc:
bg: str = "red"
fg: str = "white"
font: str = 'Calibri 14 bold'
width: int = 150
DefaultMessage = asdict(Message_dc())
在main.py中選擇整個user_form方法并將下面的整個粘貼到它的位置
def user_form(self, type, fname=None, lname=None):
self.canvas.delete("all")
self.canvas.create_window(10, 10, anchor='nw', window=tk.Label(self, text="First Name:", **cfg.DefaultLabel))
fname_ent = tk.Entry(self, **cfg.DefaultEntry)
if fname != None:
fname_ent.insert('end', fname)
self.canvas.create_window(120, 10, anchor='nw', window=fname_ent)
self.canvas.create_window(10, 40, anchor='nw', window=tk.Label(self, text="Last Name:", **cfg.DefaultLabel))
lname_ent = tk.Entry(self, **cfg.DefaultEntry)
if lname != None:
lname_ent.insert('end', lname)
self.canvas.create_window(120, 40, anchor='nw', window=lname_ent)
#don't send the entire Entry to the check ~ only the data you want to check
form_next_btn = tk.Button(self, text="next", command=lambda: self.check(type, fname_ent.get(), lname_ent.get()), **cfg.DefaultButton)
self.fnb = self.canvas.create_window(500, 340, anchor='nw', window=form_next_btn)
def check(self, type, fname, lname):
self.canvas.delete(self.fnb)
f = fname.isalpha()
l = lname.isalpha()
if f and l:
self.process(type, fname, lname)
return
if not f:
errormsg = tk.Message(self, text='Invalid entry for first name', **cfg.DefaultMessage)
self.canvas.create_window(10, 90, anchor='nw', window=errormsg)
if not l:
errormsg2 = tk.Message(self, text='Invalid entry for last name', **cfg.DefaultMessage)
self.canvas.create_window(10 if f else 170, 90, anchor='nw', window=errormsg2)
back_btn = tk.Button(self, text="back", command=lambda: self.user_form(type, fname if f else None, lname if l else None), **cfg.DefaultButton)
self.canvas.create_window(500, 340, anchor='nw', window=back_btn)
def process(self, type, fname, lname):
self.canvas.delete("all")
if type is Role.User:
print(f'{fname} {lname} is a user')
elif type is Role.Driver:
print(f'{fname} {lname} is a driver')
旁白：請記住，我根本沒有嘗試讓您的應(yīng)用程序漂亮。我只是向您展示如何讓它發(fā)揮作用。我也沒有寫出我最好的代碼。我會做所有這些完全不同的事情。我正在討論你的canvas方法并給你一些理智的東西。在我看來，您使用畫布的全部原因只是為了擁有一個圓角矩形。這似乎不值得，但這不是我的決定。
然而，這些概念并不糟糕，而且在適當?shù)纳舷挛闹锌梢苑浅姶?。讓我們以dataclasses, 為例。想象一下，如果您真的想執(zhí)行以下操作。您最終會得到一個完全自定義的Text小部件和一種非常簡單的方法來僅更改您需要更改的內(nèi)容，同時保留您分配的所有其他內(nèi)容。我dataclasses為您編寫的是一些示例概念。你可以把這些概念帶得更遠。
@dataclass
class Text_dc:
background: str = Theme.Topcoat # main element
foreground: str = Theme.Flat
borderwidth: int = 0
selectbackground: str = Theme.Primer # selected text
selectforeground: str = Theme.Accent
selectborderwidth: int = 0 # doesn't seem to do anything ~ supposed to be a border on selected text
insertbackground: str = Theme.Hilight # caret
insertborderwidth: int = 0 # border
insertofftime: int = 300 # blink off millis
insertontime: int = 600 # blink on millis
insertwidth: int = 2 # width
highlightbackground:int = Theme.Topcoat # inner border that is activated when the widget gets focus
highlightcolor: int = Theme.Topcoat # color
highlightthickness: int = 0 # thickness
cursor: str = 'xterm'
exportselection: int = 1
font: str = 'calibri 14'
width: int = 16 # characters ~ often this is ignored as Text gets stretched to fill its parent
height: int = 8 # lines ~ " " " " "
padx: int = 2
pady: int = 0
relief: str = 'flat'
wrap: str = 'word' # "none", 'word'
spacing1: int = 0 # space above every line
spacing2: int = 0 # space between every wrapped line
spacing3: int = 0 # space after return from wrap (paragraph)
state: str = 'normal' # NORMAL=Read/Write | DISABLED=ReadOnly
tabs: str = '4c'
takefocus: int = 1
undo: bool = True
xscrollcommand: Callable = None
yscrollcommand: Callable = None
#common difference
NoWrap = asdict(Text_dc(**{'wrap':'none'}))
NWReadOnly = asdict(Text_dc(**{'wrap':'none','state':'disabled'}))
ReadOnly = asdict(Text_dc(**{'state':'disabled'}))
DefaultText = asdict(Text_dc())
您可以以不同的方式使用該概念。假設(shè)您想要一個完全自定義的Text小部件，并且您打算做的不僅僅是重新設(shè)計它。下面是一個快速而骯臟的例子
class ScriptEditor(tk.Text):
def __init__(self, master, **kwargs):
tk.Text.__init__(self, master, **asdict(Text_dc(font='Consolas 14', **kwargs)))
def syntax_highlight(self):
pass
#all the other **kwargs are defaulted internally,
#but we want to adjust the size for this instance
editor = ScriptEditor(root, width=120, height=80)
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