动态调整图像地图和图像的大小 [英] Dynamically resizing Image-maps and images

问题描述

我目前正在尝试在我的网站上制作一个图像地图，它会根据窗口的大小调整大小......我想知道是否有办法用 HTML 来做到这一点，还是我必须这样做Javascript 或其他语言.

<div style="text-align:center; width:1920px; margin-left:auto; margin-right:auto;"><img id="Image-Maps_5201211070133251" src="Site.png" usemap="#Image-Maps_5201211070133251" border="0" width="1920" height="1080" alt=""/><map id="_Image-Maps_5201211070133251" name="Image-Maps_5201211070133251"><area shape="poly" coords="737,116,1149,118,944,473," href="http://essper.bandcamp.com" alt="Bandcamp" title="Bandcamp"/><area shape="poly" coords="1006,589,1418,590,1211,945," href="http://soundcloud.com/essper" alt="Soundcloud" title="Soundcloud"/><area shape="poly" coords="502,590,910,591,708,944," href="http://facebook.com/the.essper" alt="Facebook" title="Facebook"/></地图>

解决方案

如果您最终使用 JavaScript 完成任务，这里有一个跨浏览器代码片段，用于调整 MAP 元素中所有区域的大小.

window.onload = function () {var ImageMap = 函数(地图){无功，area = map.getElementsByTagName('area'),len = area.length,坐标 = [],以前的宽度 = 1920;for (n = 0; n 

previousWidth 必须等于原始图像的宽度.您还需要在 HTML 中使用一些相对单位:

<img id="Image-Maps_5201211070133251" src="Site.png" usemap="#Image-Maps_5201211070133251" border="0" width="100%" alt=""/>

在 jsFiddle 上的工作演示.如果在 IE 中打开 fiddle，点击它们时实际上可以看到 AREA.

I'm currently trying to make an Image-Map on my site that will resize depending on the size of the window... I was wondering if there was anyway to do this with HTML or will I have to do this with Javascript or another language.


<div style="text-align:center; width:1920px; margin-left:auto; margin-right:auto;">
<img id="Image-Maps_5201211070133251" src="Site.png" usemap="#Image-Maps_5201211070133251" border="0" width="1920" height="1080" alt="" />
<map id="_Image-Maps_5201211070133251" name="Image-Maps_5201211070133251">
<area shape="poly" coords="737,116,1149,118,944,473," href="http://essper.bandcamp.com" alt="Bandcamp" title="Bandcamp"   />
<area shape="poly" coords="1006,589,1418,590,1211,945," href="http://soundcloud.com/essper" alt="Soundcloud" title="Soundcloud"   />
<area shape="poly" coords="502,590,910,591,708,944," href="http://facebook.com/the.essper" alt="Facebook" title="Facebook"   />
</map>

解决方案

If you end up to do the task with JavaScript, here is a cross-browser codesnippet to resize all areas in MAP element.

window.onload = function () {
    var ImageMap = function (map) {
            var n,
                areas = map.getElementsByTagName('area'),
                len = areas.length,
                coords = [],
                previousWidth = 1920;
            for (n = 0; n < len; n++) {
                coords[n] = areas[n].coords.split(',');
            }
            this.resize = function () {
                var n, m, clen,
                    x = document.body.clientWidth / previousWidth;
                for (n = 0; n < len; n++) {
                    clen = coords[n].length;
                    for (m = 0; m < clen; m++) {
                        coords[n][m] *= x;
                    }
                    areas[n].coords = coords[n].join(',');
                }
                previousWidth = document.body.clientWidth;
                return true;
            };
            window.onresize = this.resize;
        },
        imageMap = new ImageMap(document.getElementById('map_ID'));
    imageMap.resize();
}

previousWidth must be equal to the width of the original image. You also need to use some relative units in HTML:

<div style="width:100%;">
<img id="Image-Maps_5201211070133251" src="Site.png" usemap="#Image-Maps_5201211070133251" border="0" width="100%" alt="" />

Working demo at jsFiddle. If you open the fiddle in IE, you can actually see AREAs when clicking them.

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