我有一个div,我想从各个角落调整大小,即nw,n,ne,e,w,sw,s,se。我已经尝试了jquery ui的可调整大小的插件,但在我的代码中无效。我从代码中删除了复杂性并将其置于一个非常基本的小提琴中。
我试图只调整div的西北角,然后把这个逻辑放在小提琴里。逻辑似乎对我来说是正确的,但鼠标交互工作的方式很奇怪。
你们能告诉我,我在这里做错了什么吗?如果我在左上角找到它是正确的,我可以管理其余的。感谢。
HTML:
<div id="box">
<div id="nw"></div>
<div id="n"></div>
<div id="ne"></div>
<div id="w"></div>
<div id="e"></div>
<div id="sw"></div>
<div id="s"></div>
<div id="se"></div>
</div>
<p class="one"></p>
<p class="two"></p>
CSS:
#box{border:1px solid #000;width:100px;height:100px;background-color:red;position:absolute;top:100px;left:100px}
#box > div{height:10px;width:10px;background-color:#000;position:absolute}
#nw{top:-5px;left:-5px;cursor:nw-resize}
#n{top:-5px;left:45px;cursor:n-resize}
#ne{top:-5px;right:-5px;cursor:ne-resize}
#w{top:45px;left:-5px;cursor:w-resize}
#e{top:45px;right:-5px;cursor:e-resize}
#sw{bottom:-5px;left:-5px;cursor:sw-resize}
#s{bottom:-5px;left:45px;cursor:s-resize}
#se{bottom:-5px;right:-5px;cursor:se-resize}
p{margin-top:250px;font-size:8px}
JS:
$(function(){
var mousepress = false;
$("#box > div").mousedown(function(e){
mousepress = true;
});
$("#box > div").mousemove(function(e){
if(mousepress) {
var boxX = $("#box").position().left;
var boxY = $("#box").position().top;
var boxW = $("#box").width();
var boxH = $("#box").height();
var x = boxX - e.pageX;//$(this).position().left;
var y = boxY - e.pageY;//$(this).position().top;
$("p.two").append("x: "+x+"<br />");
$(this).css({
"top":y+"px",
"left":x+"px"
});
$("#box").css({
"top":(boxY+y-5)+"px",
"left":(boxX+x-5)+"px",
"width":(boxW+x)+"px",
"height":(boxH+y)+"px",
});
}
});
$("#box > div").mouseup(function(){
mousepress = false;
});
});
** JSFIDDLE:** http://jsfiddle.net/ashwyn/v8qoLj76/2/
答案 0 :(得分:4)
我不太明白你如何计算盒子的大小和位置,而不知道用户按下哪个内部div。
我已将其更改为使用鼠标事件位置。
我还将mousemove
和mouseup
事件移动到文档中,因为使用鼠标拖动时,它可能比DOM更快地移动并开箱即用。
我还改变了内部div的位置以使用50%
,所以它总是在中间。您可能需要添加一些余量以使其更好地居中。 (见北与南 - 我向其中一人添加margin-left
)
这对我来说很好。
http://jsfiddle.net/v8qoLj76/4/
var prev_x = -1;
var prev_y = -1;
var dir = null;
$("#box > div").mousedown(function(e){
prev_x = e.clientX;
prev_y = e.clientY;
dir = $(this).attr('id');
});
$(document).mousemove(function(e){
if (prev_x == -1)
return;
var boxX = $("#box").position().left;
var boxY = $("#box").position().top;
var boxW = $("#box").width();
var boxH = $("#box").height();
var dx = e.clientX - prev_x;
var dy = e.clientY - prev_y;
//Check directions
if (dir.indexOf('n') > -1) //north
{
boxY += dy;
boxH -= dy;
}
if (dir.indexOf('s') > -1) //south
{
boxH += dy;
}
if (dir.indexOf('w') > -1) //west
{
boxX += dx;
boxW -= dx;
}
if (dir.indexOf('e') > -1) //east
{
boxW += dx;
}
$("#box").css({
"top":(boxY)+"px",
"left":(boxX)+"px",
"width":(boxW)+"px",
"height":(boxH)+"px",
});
prev_x = e.clientX;
prev_y = e.clientY;
});
$(document).mouseup(function(){
prev_x = -1;
prev_y = -1;
});
答案 1 :(得分:2)
是否需要(请参阅下面的代码段)?
$(function() {
var ORIGINAL_TOP = 100, ORIGINAL_LEFT = 100, ORIGINAL_WIDTH = 100, ORIGINAL_HEIGHT = 100, OFFSET = 5;
$('.top').css({top: (ORIGINAL_TOP - OFFSET) + 'px'});
$('.left').css({left: (ORIGINAL_LEFT - OFFSET) + 'px'});
$('.bottom').css({top: (ORIGINAL_TOP + ORIGINAL_HEIGHT - OFFSET) + 'px'});
$('.right').css({left: (ORIGINAL_LEFT + ORIGINAL_WIDTH - OFFSET) + 'px'});
$('.control-element').css({height: (2 * OFFSET) + 'px', width: (2 * OFFSET) + 'px'});
var moveMiddleControls = function(top, left, width, height) {
['top', 'bottom'].forEach(function(coordinate) {
$('#' + coordinate).css({left: (left + width / 2 - OFFSET) + 'px'});
});
['left', 'right'].forEach(function(coordinate) {
$('#' + coordinate).css({top: (top + height / 2 - OFFSET) + 'px'});
});
};
var resizeBox = function(top, left, width, height) {
$('#box').css({
top: top + 'px',
left: left + 'px',
width: width + 'px',
height: height + 'px'
});
};
var updateStatus = function(top, left, width, height) {
$('#status-top').html(Math.round(top));
$('#status-left').html(Math.round(left));
$('#status-width').html(Math.round(width));
$('#status-height').html(Math.round(height));
};
var updatePosition = function(top, left, width, height) {
resizeBox(top, left, width, height);
moveMiddleControls(top, left, width, height);
updateStatus(top, left, width, height);
};
var update = function() {
updatePosition(
$('#top').position().top + OFFSET,
$('#left').position().left + OFFSET,
$('#right').position().left - $('#left').position().left,
$('#bottom').position().top - $('#top').position().top
);
};
update();
var activeElement;
$('.control-element').mousedown(function(e) {
activeElement = this;
e.preventDefault();
return false;
});
$(document).mousemove(function(e) {
if(activeElement !== undefined) {
['top', 'bottom'].forEach(function(className) {
if($(activeElement).hasClass(className)) {
$('.' + className).css({top: e.pageY + 'px'});
}
});
['left', 'right'].forEach(function(className) {
if($(activeElement).hasClass(className)) {
$('.' + className).css({left: e.pageX + 'px'});
}
});
update();
}
});
$(document).mouseup(function() {
activeElement = undefined;
});
});
&#13;
#box {
border:1px solid #000;
background-color:red;
position: fixed;
}
.control-element {
background-color: #000;
position: fixed;
}
#top-left {
cursor: nw-resize;
}
#top {
cursor:n-resize;
}
#top-right {
cursor:ne-resize;
}
#left {
cursor:w-resize;
}
#right {
cursor:e-resize;
}
#bottom-left {
cursor:sw-resize;
}
#bottom {
cursor:s-resize;
}
#bottom-right {
cursor: se-resize;
}
.status {
position:fixed;
right: 5px;
bottom: 10px;
width: 80px;
height: 80px;
z-index: 999;
font-size:8px;
}
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="box"></div>
<div id="top-left" class="control-element top left"></div>
<div id="top" class="control-element top"></div>
<div id="top-right" class="control-element top right"></div>
<div id="right" class="control-element right"></div>
<div id="bottom-right" class="control-element bottom right"></div>
<div id="bottom" class="control-element bottom"></div>
<div id="bottom-left" class="control-element bottom left"></div>
<div id="left" class="control-element left"></div>
<div class="status">
<div>top: <span id="status-top"></span>px</div>
<div>left: <span id="status-left"></span>px</div>
<div>width: <span id="status-width"></span>px</div>
<div>height: <span id="status-height"></span>px</div>
</div>
&#13;