所以我一直在研究这个项目,我发现很难弄清楚什么是错的。我对tkinter很新,所以这可能很小。
我试图让程序在按下复选按钮时更改输入框的背景颜色。或者甚至更好,如果以某种方式我可以动态地改变它,它会更好。
这是我目前的代码:
TodayReading = []
colour = ""
colourselection= ['green3', 'dark orange', "red3"]
count = 0
def MakeForm(root, fields):
entries = []
for field in fields:
row = Frame(root)
lab = Label(row, width=15, text=field, font=("Device",10, "bold"), anchor='center')
ent = Entry(row)
row.pack(side=TOP, padx=5, fill=X, pady=5)
lab.pack(side=LEFT)
ent.pack(side=RIGHT, expand=YES, fill=X)
entries.append((field, ent))
return entries
def SaveData(entries):
import time
for entry in entries:
raw_data_point = entry[1].get()
data_point = (str(raw_data_point))
TodayReading.append(data_point)
c.execute("CREATE TABLE IF NOT EXISTS RawData (Date TEXT, Glucose REAL, BP INTEGER, Weight INTEGER)")
c.execute("INSERT INTO RawData (Date, Glucose, BP, Weight) VALUES (?, ?, ?, ?)", (time.strftime("%d/%m/%Y"), TodayReading[0], TodayReading[1] , TodayReading[2]))
conn.commit()
conn.close()
def DataCheck():
if ((float(TodayReading[0])>=4 and (float(TodayReading[0])<=6.9))):
colour = colourselection[count]
NAME OF ENTRY BOX HERE.configure(bg=colour)
感谢您的帮助。有人可能已经回复了,但就像我说我是tkinter的新人所以如果我已经看过它,我还没有想出如何实现它。
答案 0 :(得分:1)
请参阅下面的示例:
from tkinter import *
class App:
def __init__(self, root):
self.root = root
self.var = StringVar() #creates StringVar to store contents of entry
self.var.trace(mode="w", callback=self.command)
#the above sets up a callback if the variable containing
#the value of the entry gets updated
self.entry = Entry(self.root, textvariable = self.var)
self.entry.pack()
def command(self, *args):
try: #trys to update the background to the entry contents
self.entry.config({"background": self.entry.get()})
except: #if the above fails then it does the below
self.entry.config({"background": "White"})
root = Tk()
App(root)
root.mainloop()
因此,上面创建了一个entry
窗口小部件和一个variable
,其中包含该窗口小部件的内容。
每次更新variable
时,我们都会调用command()
try
将entry
背景颜色更新为entry
的内容(IE,红色,绿色,蓝色)和except
任何错误,如果引发异常,将背景更新为白色。
以下是一种不使用class
并使用单独的test
list
来检查entry
的值的方法:
来自tkinter import *
root = Tk()
global entry
global colour
def callback(*args):
for i in range(len(colour)):
if entry.get().lower() == test[i].lower():
entry.configure({"background": colour[i]})
break
else:
entry.configure({"background": "white"})
var = StringVar()
entry = Entry(root, textvariable=var)
test = ["Yes", "No", "Maybe"]
colour = ["Red", "Green", "Blue"]
var.trace(mode="w", callback=callback)
entry.pack()
root.mainloop()