我正在使用 jquery.viewport 创建一个视口(viewport)函数:我使用 jquery ui 创建 slider 和一个自己编写的缩放函数来缩放图像。此外,使用此插件创建视口(viewport)功能。
http://borbit.github.com/jquery.viewport/
问题是,缩放图像后,可拖动区域只是内容的一部分。这意味着我不能在它的某些区域拖动内容。无论如何要解决这个问题?谢谢
HTML:
<div id="view">
<img src="demo/Web081112_P002_text.png" id = "largeText"/>
<img src="demo/Web081112_P002_image.jpg" id = "largeImg"/>
</div>
<div id='slider' style='display:block;position:fixed;z-index:105;height:25%;right: 2%;top:25%;'></div>
Javascript
<script>
$(document).ready(function(){
$("#view").css("height",$(window).height());
$("#view").css("width",$(window).width());
/*
$("#box").css("height",$("#largeImg").height());
$("#box").css("width",$("#largeImg").width());
*/
//initiate the viewport
var element = $('#view').viewport();
var content = element.viewport('content');
content.draggable({containment: 'parent'});
content.scraggable({containment: 'parent'});
$( "#slider" ).slider({
orientation: "vertical",
range: "min",
min: 100,
max: 200,
value: 100,
slide: function( event, ui ) {
$("#largeText").css("width",ui.value+"%");
$("
#largeImg").css("width",ui.value+"%");
$("#largeText").css("height",ui.value+"%");
$("#largeImg").css("height",ui.value+"%");
$("#largeText").css('top', ($("#view").height()/2-$("#largeText").height()/2) +'px');
$("#largeImg").css('top', ($("#view").height()/2-$("#largeImg").height()/2) +'px');
$('#largeText').css('left', ($("#view").width()/2 - $('#largeText').width()/2)+'px');
$('#largeImg').css('left', ($("#view").width()/2 - $('#largeImg').width()/2)+'px');
//element.viewport('update');
//Using this statement to update will occur error.
}
});
});
</script>
CSS:
<style>
#view {
height:600px;
width:350px;
}
#largeImg {
position:absolute;
display:block;
width: 1250px;
height: 1500px;
z-index: 100;
}
#largeText {
position:absolute;
display:block;
width: 1250px;
height: 1500px;
z-index: 101;
}
body {
width : auto;
height: auto;
overflow:hidden;
}
</style>
最佳答案
下面应该根据您对问题的描述为您提供解决方案。我稍微简化了问题,但这仍然可以帮助您指明正确的方向。
此外,如果 $('#view').viewport('update');
无法正常工作,请提供您使用的浏览器和版本。
解决方案示例: http://jsfiddle.net/wA3eU/3/
HTML
<link rel="stylesheet" href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.10/jquery-ui.min.js"></script>
<script type="text/javascript" src="https://github.com/borbit/jquery.viewport/raw/master/jquery.viewport.js"></script>
<script type="text/javascript" src="https://github.com/borbit/jquery.scraggable/raw/master/jquery.scraggable.js"></script>
<table id="SliderData">
<tr><td>Scale: </td><td> <div id="UIVal">0</div></td><tr>
<tr><td>Width: </td><td> <div id="Width">0</div></td><tr>
<tr><td>Height: </td><td> <div id="Height">0</div></td><tr>
</table>
<div id="view">
<img src="http://farm8.static.flickr.com/7108/6947221908_3675a27fe9.jpg" id = "largeImg"/>
</div>
<div id='slider'></div>
CSS
#slider {
display:block;
position:fixed;
z-index:105;
height:25%;
right:2%;
top:25%;
margin:1em;
background:#ccc;
}
#SliderData {
float:left;
display:block;
position:fixed;
z-index:105;
padding: .5em;
background: #ccc;
opacity:0.4;
filter:alpha(opacity=40); /* For IE8 and earlier */
}
#view {
height:250px;
width:250px;
}
#largeImg {
position:absolute;
display:block;
width: 500px;
height: 500px;
z-index: 100;
}
body {
width : auto;
height: auto;
overflow:hidden;
}
JQuery
$("#view").css("height",$(window).height());
$("#view").css("width",$(window).width());
//initiate the viewport
var element = $('#view').viewport();
var content = element.viewport('content');
content.draggable({containment: 'parent'});
content.scraggable({containment: 'parent'});
var defaultHeight = $("#largeImg").height();
var defaultWidth = $("#largeImg").width();
$( "#slider" ).slider({
orientation: "vertical",
range: "min",
min: 100, // 1x
max: 300, // 3x
value: 100,
slide: function(event, ui) {
scale = ui.value/100.;
$("#largeImg").css('width',defaultHeight * scale);
$("#largeImg").css('height',defaultWidth * scale);
element = $('#view').viewport('update');
$("#UIVal").text(scale);
$("#Width").text($("#largeImg").width());
$("#Height").text($("#largeImg").height());
}
});
关于javascript - 使用 Jquery 缩放图像后可拖动区域不正确,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13800609/