如何在JavaScript中的图像上添加可拖动文本 [英] How to add draggable text on image in javascript
本文介绍了如何在JavaScript中的图像上添加可拖动文本的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想创建一个非常简单的模因创建器工具.这是图像和文本的代码.我在图片上拖了文字.你能帮忙吗?
Hi I would like to create one very simple meme creator tool. Here is the code to Image and Text. I have drag text on image. could you help ?
<html>
<body>
<div id="draggable-element">Drag me!</div>
<style>
body {padding:10px}
#draggable-element {
width:100px;
height:10px;
background-color:#fff;
color:black;
padding:10px 12px;
cursor:move;
position:relative; /* important (all position that's not `static`) */
}
</style>
<Script>
var selected = null, // Object of the element to be moved
x_pos = 0, y_pos = 0, // Stores x & y coordinates of the mouse pointer
x_elem = 0, y_elem = 0; // Stores top, left values (edge) of the element
// Will be called when user starts dragging an element
function _drag_init(elem) {
// Store the object of the element which needs to be moved
selected = elem;
x_elem = x_pos - selected.offsetLeft;
y_elem = y_pos - selected.offsetTop;
}
// Will be called when user dragging an element
function _move_elem(e) {
x_pos = document.all ? window.event.clientX : e.pageX;
y_pos = document.all ? window.event.clientY : e.pageY;
if (selected !== null) {
selected.style.left = (x_pos - x_elem) + 'px';
selected.style.top = (y_pos - y_elem) + 'px';
}
}
// Destroy the object when we are done
function _destroy() {
selected = null;
}
// Bind the functions...
document.getElementById('draggable-element').onmousedown = function () {
_drag_init(this);
return false;
};
document.onmousemove = _move_elem;
document.onmouseup = _destroy;
</script>
</body>
</html>
这是拖动文本的代码.但是我需要将其拖到图像上.如何轻松地做到这一点.
This is code for drag text. But I need to drag this on image. How to do this in easy way.
推荐答案
只需使用 position:absolute; 而不是相对的.
Just use position: absolute; instead of relative.
var selected = null, // Object of the element to be moved
x_pos = 0,
y_pos = 0, // Stores x & y coordinates of the mouse pointer
x_elem = 0,
y_elem = 0; // Stores top, left values (edge) of the element
// Will be called when user starts dragging an element
function _drag_init(elem) {
// Store the object of the element which needs to be moved
selected = elem;
x_elem = x_pos - selected.offsetLeft;
y_elem = y_pos - selected.offsetTop;
}
// Will be called when user dragging an element
function _move_elem(e) {
x_pos = document.all ? window.event.clientX : e.pageX;
y_pos = document.all ? window.event.clientY : e.pageY;
if (selected !== null) {
selected.style.left = (x_pos - x_elem) + 'px';
selected.style.top = (y_pos - y_elem) + 'px';
}
}
// Destroy the object when we are done
function _destroy() {
selected = null;
}
// Bind the functions...
document.getElementById('draggable-element').onmousedown = function() {
_drag_init(this);
return false;
};
document.onmousemove = _move_elem;
document.onmouseup = _destroy;body {
padding: 10px
}
#draggable-element {
width: 100px;
height: 10px;
background-color: #fff;
color: black;
padding: 10px 12px;
cursor: move;
position: absolute;
/* important (all position that's not `static`) */
}<div id="draggable-element">Drag me!</div>
<img src="https://www.google.co.in/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png"/>这篇关于如何在JavaScript中的图像上添加可拖动文本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
