前言

有位朋友需要在Python下开发GUI,想要做一个网格列表,所以动手做了一个MultiListbox网格列表控件。

正文

import apply as apply
import pandas as pd
import numpy as np
#GUI
from tkinter import*


"""
使用tklinter下的Listbox控件
实现一个单行多值的网格列表控件
"""
class MultiListbox(Frame):

def __init__(self,master,lists):
Frame.__init__(self,master)
self.lists = []
for l, w in lists:
frame = Frame(self)
frame.pack(side=LEFT, expand=YES, fill=BOTH)
Label(frame, text=l, borderwidth=1, relief=RAISED).pack(fill=X)
lb = Listbox(frame, width=w, borderwidth=0, selectborderwidth=0, relief=FLAT, exportselection=FALSE)
lb.pack(expand=YES, fill=BOTH)
self.lists.append(lb)
lb.bind("<B1-Motion>",lambda e, s=self: s._select(e.y))
lb.bind("<Button-1>",lambda e,s=self: s._select(e.y))
lb.bind("<Leave>",lambda e: "break")
lb.bind("<B2-Motion>",lambda e,s=self: s._b2motion(e.x,e.y))
lb.bind("<Button-2>",lambda e,s=self: s._button2(e.x,e.y))
frame = Frame(self)
frame.pack(side=LEFT, expand=YES, fill=BOTH)

Label(frame, borderwidth=1, relief=RAISED).pack(fill=X)
sb = Scrollbar(frame,orient=VERTICAL, command=self._scroll)
sb.pack(side=LEFT, fill=Y)
self.lists[0]["yscrollcommand"] = sb.set

def _select(self, y):
row = self.lists[0].nearest(y)
self.selection_clear(0, END)
self.selection_set(row)
return "break"

def _button2(self, x, y):
for l in self.lists:
l.scan_mark(x,y)
return "break"

def _b2motion(self, x, y):
for l in self.lists:
l.scan_dragto(x, y)
return "break"

def _scroll(self, *args):
for l in self.lists:
apply(l.yview, args)
return "break"

def curselection(self):
return self.lists[0].curselection()

def delete(self, first, last=None):
for l in self.lists:
l.delete(first,last)

def get(self, first, last=None):
result = []
for l in self.lists:
result.append(l.get(first,last))
if last:
return apply(map, [None] + result)
return result

def index(self, index):
self.lists[0],index(index)

def insert(self, index, *elements):
for e in elements:
i = 0
for l in self.lists:
l.insert(index, e[i])
i = i + 1

def size(self):
return self.lists[0].size()

def see(self, index):
for l in self.lists:
l.see(index)

def selection_anchor(self, index):
for l in self.lists:
l.selection_anchor(index)

def selection_clear(self, first, last=None):
for l in self.lists:
l.selection_clear(first,last)

def selection_includes(self, index):
return self.lists[0].seleciton_includes(index)

def selection_set(self, first, last=None):
for l in self.lists:
l.selection_set(first, last)

测试运行的代码

if __name__ == "__main__":
tk = Tk()
Label(tk, text="MultiListbox").pack()
mlb = MultiListbox(tk,(('ID', 10),('Name', 20),("Date", 10)))
for i in range(100):
mlb.insert(END,('Important Message: %d' % i,'John Doe', '10/10/%4d' % (1900+i)))
mlb.pack(expand=YES, fill=BOTH)
# 指定控件的位置与大小
# mlb.place(x=1,y=100,width=500,height=150)
tk.mainloop()

代码还存在些许需要改进的地方,TODO


to be continued…