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Javascript - 按下按键后保持按下状态(返回 true)

转载 作者:行者123 更新时间:2023-11-27 23:08:51 27 4
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您必须先单击任意位置,以便注册按 Shift 键。

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!doctype html>
<html>

<head>

<title>Display Coloring</title>

<script src="jquery-2.2.1.min.js"></script>

<style type="text/css">
div {
background-color: rgb(0, 0, 0);
width: 20px;
height: 20px;
left: 0;
top: 0;
bottom: 0;
line-height: 0;
margin: 0;
padding: 0;
display: inline-block;
float: left;
}
body {
top: 0;
left: 0;
bottom: 0;
margin: 0;
padding: 0;
margin: 0;
width: 1920px;
height: 1080px;
}
div:hover {
background-color: rgb(0, 0, 0);
background-color: rgba(255, 0, 0, 0.5);
}
input {
float: left;
width: 20px;
height: 20px;
top: 0;
left: 0;
bottom: 0;
padding: 0;
-webkit-appearance: none;
background-color: rgba(0, 0, 0, 0);
box-shadow: none !important;
outline: none;
border: none;
word-spacing: 0;
letter-spacing: 0;
}
#conDiv {
width: 1920px;
height: 1080px;
background-color: transparent;
position: absolute;
z-index: 1;
}
#conInput {
width: 1920px;
height: 1080px;
position: absolute;
z-index: -1;
}
</style>

</head>

<body>

<script>
var body = document.body;

a = [];
b = [];
c = [];
i = [];
d = [];
clicked = [];
altDown = false;

window.onload = function() {

conInput = document.createElement('div');
conInput.setAttribute('id', 'conInput');
document.body.appendChild(conInput);

conDiv = document.createElement('div');
conDiv.setAttribute('id', 'conDiv');
document.body.appendChild(conDiv);

//for(u=0;u<1911;u+=10){
for (u = 0; u < 1901; u += 20) {

a.push(u);

for (v = 0; v < 1061; v += 20) {
//for(v=0; v<1071; v+=10){

b.push(v);

var newDiv = document.createElement("div");
newDiv.id = b.length - 1;
conDiv.appendChild(newDiv);
}
}

//for(u=0;u<1911;u+=10){

// for(v=0; v<1071; v+=10){
for (u = 0; u < 1901; u += 20) {

for (v = 0; v < 1061; v += 20) {

c.push(v);

var newInput = document.createElement("input");
newInput.setAttribute('type', 'color');
newInput.id = c.length - 1;

conInput.appendChild(newInput);
}
}

function marking() {

$("body").on("keydown keyup", function(event) {

if (event.type == "keydown") {
console.log(event.type);
$('div').hover(function() {
if (event.keyCode == 16 && this.id !== "conDiv" && this.id !== "conInput") {
clicked.push(this);
this.style.backgroundColor = "#b3ffb3";
console.log(event);
}
})
} else {
console.log(event);
$('div').hover(function() {
if (event.keyCode == 16) {
//if()
if (this.id !== "conDiv" && this.id !== "conInput") {
this.style.backgroundColor = "#000000";
//console.log(event.shiftKey);
}
}
})
}
})
}

function changeColor() {

divs = body.getElementsByTagName('div');
inputs = body.getElementsByTagName('input');

for (var l = 0; l < inputs.length; l++) {

if (inputs[l].id !== "conInput") {

i.push(inputs[l]);

}

}

for (var k = 0; k < divs.length; k++) {

if (divs[k].id !== "conDiv" && divs[k].id !== "conInput") {

d.push(divs[k]);

}

}

$(document).ready(function() {

$("body").bind("keydown", function(event) {

if (event.altKey) {

for (var h in d) {

//if(d[h].id == "10272" && altDown == false){
if (d[h].id == "2544" && altDown == false) {

d[h].style.opacity = "0.4";

altDown = true;

}

//else if(d[h].id == "10272" && altDown == true) {
else if (d[h].id == "2544" && altDown == true) {

d[h].style.opacity = "1";

altDown = false;

}

}
}
});
});

$('div').on('click', function() {

if (this.id != "conDiv" && this.id != "conInput") {

if (event.ctrlKey) {

clicked.push(this);

for (var h in d) {

if (d[h].id == this.id) {

$(d[h]).css('background-color', 'rgba(255, 255, 102, 0.8)');

}

}

} else if (clicked.length > 0) {

for (var clk in clicked) {

target = document.getElementById(this.id);

$(target).click();

$(target).on('change', function() {

newColor = this.value;

parsed = newColor.charAt(0) == "#" ? newColor.substring(1, 7) : newColor;

r = parseInt(parsed.substring(0, 2), 16).toString();
g = parseInt(parsed.substring(2, 4), 16).toString();
b = parseInt(parsed.substring(4, 6), 16).toString();

newColorRGB = "(" + r + ", " + g + ", " + b + ")";

for (clk in clicked) {

clicked[clk].style.backgroundColor = newColor;
clicked[clk].setAttribute("title", newColorRGB);

}

clicked = [];

});

}

} else if (clicked.length == 0) {

for (var z in i) {

if (i[z].id == this.id) {

target = document.getElementById(this.id);

$(target).click();

$(target).on('change', function() {

newColor = this.value;

parsed = newColor.charAt(0) == "#" ? newColor.substring(1, 7) : newColor;

r = parseInt(parsed.substring(0, 2), 16).toString();
g = parseInt(parsed.substring(2, 4), 16).toString();
b = parseInt(parsed.substring(4, 6), 16).toString();

newColorRGB = "(" + r + ", " + g + ", " + b + ")";

for (var h in d) {

if (d[h].id == this.id) {

d[h].style.backgroundColor = newColor;
d[h].setAttribute("title", newColorRGB);

}

}

});

}
}
}

}

});

}

changeColor();
marking();
}
</script>

</body>

</html>

如果我按下shiftKey,它就会起作用,并且div会获得它们的颜色,但如果我释放shiftKey,状态将保持true 并且它会一直着色直到刷新。

这是代码:

function marking(){
$("body").bind("keydown", function(event) {
$('div').hover(function(){
if(event.shiftKey){
if(this.id !== "conDiv" && this.id !== "conInput"){
clicked.push(this);
this.style.backgroundColor = "#b3ffb3";
console.log(event.shiftKey);
}
}
else{};
}
})
});

}

我可以以某种方式告诉程序在释放shiftKey时使用react吗?

更新

$("body").on("keydown keyup", function(event) {

if(event.type == "keydown"){
$('div').hover(function(){
if(event.keyCode == 16 && this.id !== "conDiv" && this.id !== "conInput"){
clicked.push(this);
this.style.backgroundColor = "#b3ffb3";
console.log(event);
}
})
}
else{
console.log(event);
$('div').hover(function(){
if(event.keyCode == 16){
if(this.id !== "conDiv" && this.id !== "conInput"){
this.style.backgroundColor = "#000000";
}
}
})
}
})

现在它会更改 shiftKey 上的颜色并将 keyup 上的颜色更改为 #000000。但它仍然停留在 keydown 上,如果我将鼠标悬停在 div 上,它会将对象插入我的数组而不着色。

我希望它在按下 Shift 时着色,而在释放 Shift 时不执行任何操作。

我错过了什么?

最佳答案

您似乎需要的是 mousemove 事件以及 shiftKey event property .

现在的一个问题是,您没有取消按下 Shift 时设置的悬停处理程序。

主要区别是

  function marking() {
$("body").on("mousemove", "div", function(event) {
if (event.shiftKey) {
this.style.backgroundColor "#b3ffb3";
}
})
}

我修改了下面的代码

<!doctype html>
<html>

<head>

<title>Display Coloring</title>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<style type="text/css">
div {
background-color: rgb(0, 0, 0);
width: 20px;
height: 20px;
left: 0;
top: 0;
bottom: 0;
line-height: 0;
margin: 0;
padding: 0;
display: inline-block;
float: left;
}
body {
top: 0;
left: 0;
bottom: 0;
margin: 0;
padding: 0;
margin: 0;
width: 1920px;
height: 1080px;
}
div:hover {
background-color: rgb(0, 0, 0);
background-color: rgba(255, 0, 0, 0.5);
}
input {
float: left;
width: 20px;
height: 20px;
top: 0;
left: 0;
bottom: 0;
padding: 0;
-webkit-appearance: none;
background-color: rgba(0, 0, 0, 0);
box-shadow: none !important;
outline: none;
border: none;
word-spacing: 0;
letter-spacing: 0;
}
#conDiv {
width: 1920px;
height: 1080px;
background-color: transparent;
position: absolute;
z-index: 1;
}
#conInput {
width: 1920px;
height: 1080px;
position: absolute;
z-index: -1;
}
</style>

</head>

<body>

<script>
var body = document.body;

a = [];
b = [];
c = [];
i = [];
d = [];
clicked = [];
altDown = false;

window.onload = function() {

conInput = document.createElement('div');
conInput.setAttribute('id', 'conInput');
document.body.appendChild(conInput);

conDiv = document.createElement('div');
conDiv.setAttribute('id', 'conDiv');
document.body.appendChild(conDiv);

//for(u=0;u<1911;u+=10){
for (u = 0; u < 1901; u += 20) {

a.push(u);

for (v = 0; v < 1061; v += 20) {
//for(v=0; v<1071; v+=10){

b.push(v);

var newDiv = document.createElement("div");
newDiv.id = b.length - 1;
conDiv.appendChild(newDiv);
}
}

//for(u=0;u<1911;u+=10){

// for(v=0; v<1071; v+=10){
for (u = 0; u < 1901; u += 20) {

for (v = 0; v < 1061; v += 20) {

c.push(v);

var newInput = document.createElement("input");
newInput.setAttribute('type', 'color');
newInput.id = c.length - 1;

conInput.appendChild(newInput);
}
}

function marking() {

$("body").on("mousemove", "div", function(event) {
if (event.shiftKey) {
this.style.backgroundColor = "#b3ffb3";
}
})
}

function changeColor() {

divs = body.getElementsByTagName('div');
inputs = body.getElementsByTagName('input');

for (var l = 0; l < inputs.length; l++) {

if (inputs[l].id !== "conInput") {

i.push(inputs[l]);

}

}

for (var k = 0; k < divs.length; k++) {

if (divs[k].id !== "conDiv" && divs[k].id !== "conInput") {

d.push(divs[k]);

}

}

$(document).ready(function() {

$("body").bind("keydown", function(event) {

if (event.altKey) {

for (var h in d) {

//if(d[h].id == "10272" && altDown == false){
if (d[h].id == "2544" && altDown == false) {

d[h].style.opacity = "0.4";

altDown = true;

}

//else if(d[h].id == "10272" && altDown == true) {
else if (d[h].id == "2544" && altDown == true) {

d[h].style.opacity = "1";

altDown = false;

}

}
}
});
});

$('div').on('click', function() {

if (this.id != "conDiv" && this.id != "conInput") {

if (event.ctrlKey) {

clicked.push(this);

for (var h in d) {

if (d[h].id == this.id) {

$(d[h]).css('background-color', 'rgba(255, 255, 102, 0.8)');

}

}

} else if (clicked.length > 0) {

for (var clk in clicked) {

target = document.getElementById(this.id);

$(target).click();

$(target).on('change', function() {

newColor = this.value;

parsed = newColor.charAt(0) == "#" ? newColor.substring(1, 7) : newColor;

r = parseInt(parsed.substring(0, 2), 16).toString();
g = parseInt(parsed.substring(2, 4), 16).toString();
b = parseInt(parsed.substring(4, 6), 16).toString();

newColorRGB = "(" + r + ", " + g + ", " + b + ")";

for (clk in clicked) {

clicked[clk].style.backgroundColor = newColor;
clicked[clk].setAttribute("title", newColorRGB);

}

clicked = [];

});

}

} else if (clicked.length == 0) {

for (var z in i) {

if (i[z].id == this.id) {

target = document.getElementById(this.id);

$(target).click();

$(target).on('change', function() {

newColor = this.value;

parsed = newColor.charAt(0) == "#" ? newColor.substring(1, 7) : newColor;

r = parseInt(parsed.substring(0, 2), 16).toString();
g = parseInt(parsed.substring(2, 4), 16).toString();
b = parseInt(parsed.substring(4, 6), 16).toString();

newColorRGB = "(" + r + ", " + g + ", " + b + ")";

for (var h in d) {

if (d[h].id == this.id) {

d[h].style.backgroundColor = newColor;
d[h].setAttribute("title", newColorRGB);

}

}

});

}
}
}

}

});

}

changeColor();
marking();
}
</script>

</body>

</html>

关于Javascript - 按下按键后保持按下状态(返回 true),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36359471/

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