GUI(用于输入和输出矩阵)?
问题内容:
我需要创建一个GUI,以将数据输入到矩阵或表中并读取此表单数据。
完美的解决方案是将输入格式限制为仅允许float
。
例如:
A=[[1.02,-0.25,-0.30,0.515],[-0.41,1.13,-0.15,1.555],[-0.25,-0.14,1.21,2.780]]
问题:
-
我可以使用什么?
Tkinter没有表格,Python 3.3.2不支持wxPython -
PyQt4呢?
也许您可以举一些例子,说明如何从in表中获取数据[[],[],[]]
?
有人有想法吗?
谢谢
问题答案:
使用tkinter,您不需要特殊的表格小部件即可执行此操作,只需创建一个普通条目小部件的网格即可。如果有太多需要滚动条的地方,它会稍微困难一些(本网站上有一些示例,说明如何做到这一点),但是只是创建一个很小的网格就非常简单了。
这是一个示例,其中还包括一些输入验证:
import tkinter as tk
class SimpleTableInput(tk.Frame):
def __init__(self, parent, rows, columns):
tk.Frame.__init__(self, parent)
self._entry = {}
self.rows = rows
self.columns = columns
# register a command to use for validation
vcmd = (self.register(self._validate), "%P")
# create the table of widgets
for row in range(self.rows):
for column in range(self.columns):
index = (row, column)
e = tk.Entry(self, validate="key", validatecommand=vcmd)
e.grid(row=row, column=column, stick="nsew")
self._entry[index] = e
# adjust column weights so they all expand equally
for column in range(self.columns):
self.grid_columnconfigure(column, weight=1)
# designate a final, empty row to fill up any extra space
self.grid_rowconfigure(rows, weight=1)
def get(self):
'''Return a list of lists, containing the data in the table'''
result = []
for row in range(self.rows):
current_row = []
for column in range(self.columns):
index = (row, column)
current_row.append(self._entry[index].get())
result.append(current_row)
return result
def _validate(self, P):
'''Perform input validation.
Allow only an empty value, or a value that can be converted to a float
'''
if P.strip() == "":
return True
try:
f = float(P)
except ValueError:
self.bell()
return False
return True
class Example(tk.Frame):
def __init__(self, parent):
tk.Frame.__init__(self, parent)
self.table = SimpleTableInput(self, 3, 4)
self.submit = tk.Button(self, text="Submit", command=self.on_submit)
self.table.pack(side="top", fill="both", expand=True)
self.submit.pack(side="bottom")
def on_submit(self):
print(self.table.get())
root = tk.Tk()
Example(root).pack(side="top", fill="both", expand=True)
root.mainloop()
有关输入验证的更多信息,请参见此处:在tkinter中交互验证Entry小部件内容