我在pygubu中使用tkinter。我想要获得Entry_1小部件的价值。 Entry_1小部件值为蓝色。 Entry_1的textvariable为'text_1' 我读了pygubu文件。但我不明白。 谁能够轻松地认识我。
和我链接ask.ui文件以使用pygubu http://www.joinsland114.mireene.com/data/ask.ui
try:
import tkinter as tk # for python 3
except:
import Tkinter as tk # for python 2
import pygubu
from tkinter import *
class Application:
def __init__(self, master):
#1: Create a builder
self.builder = builder = pygubu.Builder()
#2: Load an ui file
builder.add_from_file('ask.ui')
#3: Create the widget using a master as parent
self.mainwindow = builder.get_object('Frame_1', master)
builder.connect_callbacks(self)
root = tk.Tk()
app = Application(root)
print(app.mainwindow.getvar('text_1'))
root.mainloop()
Traceback(最近一次调用最后一次):文件“C:\ Python34 \ pygubu.py”,行 25,在 print(app.mainwindow.getvar('text_1'))文件“C:\ Python34 \ lib \ tkinter__init __。py”,第454行,在getvar中 return self.tk.getvar(name) _tkinter.TclError:无法读取“text_1”:没有这样的变量
答案 0 :(得分:1)
使用pygubu-designer打开 ask.ui 文件,然后展开Frame_2并单击Entry_1。在下面的“常规”选项卡下,您将看到 textvariable 为空。在此字段中输入: entry1_var 。
对于Entry_2,请输入 textvariable 字段: entry2_var ,对于Entry_3,请输入 textvariable 字段: entry3_var 。
要点击OK按钮,在控制台上输入蓝色,黄色和绿色的3个变量值,然后:选择Button_1并在其命令字段中输入: button1_callback
在主菜单栏上,点击文件并保存 ask.ui 文件。
如果您现在浏览 ask.ui 文件的内容,则会添加以下四行...
<property name="textvariable">string:entry1_var</property>
<property name="textvariable">string:entry2_var</property>
<property name="textvariable">string:entry3_var</property>
<property name="command">button1_callback</property>
以下方法现已添加到 ask.py 文件中:
def button1_callback(self):
"Display the values of the 3 x Entry widget variables"
print(self.builder.tkvariables['entry1_var'].get())
print(self.builder.tkvariables['entry2_var'].get())
print(self.builder.tkvariables['entry3_var'].get())
# Change Entry_3 from green to red
self.builder.tkvariables['entry3_var'].set("red"))
同时删除或注释掉行 #print(app.mainwindow.getvar('text_1'))
您的 ask.py 文件现在应该如下所示......
try:
import tkinter as tk # for python 3
except:
import Tkinter as tk # for python 2
import pygubu
from tkinter import *
class Application:
def __init__(self, master):
#1: Create a builder
self.builder = builder = pygubu.Builder()
#2: Load an ui file
builder.add_from_file('ask.ui')
#3: Create the widget using a master as parent
self.mainwindow = builder.get_object('Frame_1', master)
builder.connect_callbacks(self)
def button1_callback(self):
"Display the values of the 3 x Entry widget variables"
print(self.builder.tkvariables['entry1_var'].get())
print(self.builder.tkvariables['entry2_var'].get())
print(self.builder.tkvariables['entry3_var'].get())
# Change Entry_3 from green to red
self.builder.tkvariables['entry3_var'].set("red")
root = tk.Tk()
app = Application(root)
#print(app.mainwindow.getvar('text_1')) <-- This is commented out
root.mainloop()
运行python程序并单击“确定”按钮。控制台将显示:
$ python3 ask.py
blue
yellow
green
第三个条目小部件将从显示绿色更改为红色。