python todo-list web page implementation
Start
Give the code first
todolist.py
from flask import Flask,render_template
todolist = []
app = Flask(__name__)
@app.route('/')
def home():
return render_template('todolist.html')
@app.route('/api/todolist/checkItems',methods=['POST'])
def checkTodo():
return str(todolist),200
@app.route('/api/todolist/delItem/<int:item>',methods=['POST'])
def delTodo(item):
todolist.pop(item)
return ''
@app.route('/api/todolist/addItem/<content>',methods=['POST'])
def addTodo(content):
todolist.append(content)
return ''
app.run()
template/todolist.html
<!DOCTYPE html>
<html>
<head>
<title>todolist日程表</title>
</head>
<body>
<h1>todolist日程表</h1>
创建新的日程new todo:<input type="text" id="newTodo" name="newTodo" /><input type="button" id="submit" value="submit确认" name="submit" />
<br />
<input type="button" id="clear" name="clear" value="删除已完成的delete the finished items">
<br />
<div id="div">
</div>
</body>
<script>
var newTodo = document.getElementById('newTodo')
var submit = document.getElementById('submit')
var clear = document.getElementById('clear')
var div = document.getElementById('div')
function init(){
if(window.XMLHttpRequest){
return new XMLHttpRequest()
}else if(window.ActiveXObject){
return new ActiveXObject("Microsoft.XMLHTTP");
}
}
function recieveData(){
http = init()
http.open('POST','/api/todolist/checkItems')
http.onreadystatechange = function(){
if(http.status == 200 && http.responseText){
var resp = eval(http.responseText)
for(var i = 0;i < resp.length;i ++){
var item = resp[i]
item = '<input name="todoCheckBtns" type="checkbox"><label name="todoLabels">' + item + '</label>'
if(div.innerHTML.indexOf(item) == -1){
div.innerHTML += item
div.innerHTML += '<br name="newlines" />'
}
}
}
}
http.send(null)
}
setInterval('recieveData()',100)
submit.onclick = function(){
var todo = newTodo.value
http = init()
http.open("POST","/api/todolist/addItem/" + todo)
http.send(null)
}
clear.onclick = function(){
var checkBtns = document.getElementsByName('todoCheckBtns')
var labels = document.getElementsByName('todoLabels')
var newlines = document.getElementsByName('newlines')
if(checkBtns.length < 1){
return
}
var len = checkBtns.length
for(var i = len - 1;i >= 0;i --){
if(checkBtns[i].checked){
checkBtns[i].outerHTML = ""
labels[i].outerHTML = ""
newlines[i].outerHTML = ""
http = init()
http.open('POST','/api/todolist/delItem/' + i)
http.send(null)
}
}
}
</script>
</html>
Code analysis
main.py
initialization
from flask import Flask,render_template
todolist = []
app = Flask(__name__)
Add root route
@app.route('/')
def home():
return render_template('todolist.html')
Add interface
@app.route('/api/todolist/checkItems',methods=['POST'])
def checkTodo():
return str(todolist),200
@app.route('/api/todolist/delItem/<int:item>',methods=['POST'])
def delTodo(item):
todolist.pop(item)
return ''
@app.route('/api/todolist/addItem/<content>',methods=['POST'])
def addTodo(content):
todolist.append(content)
return ''
start operation
app.run()
templates/todolist.html
initialization
<!DOCTYPE html>
<html>
title
<head>
<title>todolist日程表</title>
</head>
<body>
<h1>todolist日程表</h1>
Operation part
创建新的日程new todo:<input type="text" id="newTodo" name="newTodo" /><input type="button" id="submit" value="submit确认" name="submit" />
<br />
<input type="button" id="clear" name="clear" value="删除已完成的delete the finished items">
<br />
div for storing todo items
<div id="div">
</div>
</body>
script part
initialization
var newTodo = document.getElementById('newTodo')
var submit = document.getElementById('submit')
var clear = document.getElementById('clear')
var div = document.getElementById('div')
function init(){
if(window.XMLHttpRequest){
return new XMLHttpRequest()
}else if(window.ActiveXObject){
return new ActiveXObject("Microsoft.XMLHTTP");
}
}
Receive data every 100ms
function recieveData(){
http = init()
http.open('POST','/api/todolist/checkItems')
http.onreadystatechange = function(){
if(http.status == 200 && http.responseText){
var resp = eval(http.responseText)
for(var i = 0;i < resp.length;i ++){
var item = resp[i]
item = '<input name="todoCheckBtns" type="checkbox"><label name="todoLabels">' + item + '</label>'
if(div.innerHTML.indexOf(item) == -1){
div.innerHTML += item
div.innerHTML += '<br name="newlines" />'
}
}
}
}
http.send(null)
}
setInterval('recieveData()',100)
New item
submit.onclick = function(){
var todo = newTodo.value
http = init()
http.open("POST","/api/todolist/addItem/" + todo)
http.send(null)
}
Organize the todo-list part
clear.onclick = function(){
var checkBtns = document.getElementsByName('todoCheckBtns')
var labels = document.getElementsByName('todoLabels')
var newlines = document.getElementsByName('newlines')
if(checkBtns.length < 1){
return
}
var len = checkBtns.length
for(var i = len - 1;i >= 0;i --){
if(checkBtns[i].checked){
checkBtns[i].outerHTML = ""
labels[i].outerHTML = ""
newlines[i].outerHTML = ""
http = init()
http.open('POST','/api/todolist/delItem/' + i)
http.send(null)
}
}
}
Final closed loop
</script>
</html>
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Author
hit-road
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