How do you JavaScript style area elements on mouseover? - javascript

I've got an image map with 20 area elements, only four shown below. I want to style each area so that a blue border appears whenever a user hovers over it - all the area shapes are rectangles.
<map id="mymap" name="mymap">
<area shape="rect" coords="0,0,223,221" href="http://..." />
<area shape="rect" coords="226,0,448,221" href="http://..." />
<area shape="rect" coords="451,0,673,223" href="http://..." />
<area shape="rect" coords="677,0,1122,223" href="http://..." />
...
</map>
I've tried using CSS to style each area, but it's not working. And I've tried to put an onmouseover=color() on the map element and call the following function, but that doesn't seem to be working either:
function color() {
var blueboxes = document.getElementsByTagName('area');
for(var i=0; i<blueboxes.length; i++) {
blueboxes[i].style.border = 'solid blue 5px';
}
}


mapper.js can be used for this.
Mapper.js 2.4 allows you to add automatic area highlighting to image maps on your webpages (inc. export to SVG).
It works in all the major browsers - Mozilla Firefox 1.5+, Opera 9+, Safari and IE6+. On older browsers, it can use "jsgraphics" from Walter Zorn (if installed), else it'll degrade and your visitors won't notice a thing.
Sample code from that website:
Please note that everything below this line is his code and wording, not mine. Full attribution belongs to the link above.
Setting Up
Download mapper.js and include it into your webpage.
<script type="text/javascript" src="wz_jsgraphics.js"></script>
<script type="text/javascript" src="mapper.js"></script>
"wz_jsgraphics.js" is copyright by Walter Zorn and not part of the distribution!
Using It
To get the highlighting just add a class="mapper" to an div surrounded image.
<div>
<img src="..." class="mapper" usemap="..." alt="...">
</div>
To get individual area highlightings add one or more classes to the area.
<map>
...
<area shape="poly" class="noborder icolor00ff00" href="#" coords="...">
...
</map>
To get multiple area selections add one or more id's to the areas rel attribute.
<map>
...
<area shape="poly" id="blue" rel="green,red" href="#" coords="...">
<area shape="poly" id="green" rel="red,blue" href="#" coords="...">
<area shape="poly" id="red" rel="green,blue" href="#" coords="...">
...
</map>
To force a group of areas using the attributes of the initial area.
<map>
...
<area shape="rect" id="black" class="icolor000000 forcegroup" rel="green,red,blue" href="#" coords="...">
...
</map>


The area tag can't be styled like a normal anchor. I would use a different approach. You could apply your image to a div as the background-image and then position clickable elements over the div by using position: absolute.
Take a look at this technique: http://www.alistapart.com/articles/cssmaps/


Can Raphaeljs helps?
Have a look at this sample :)


Usually the approach I see is to build the imagemap itself out of different images in CSS. Here's a good example of this:
http://ago.tanfa.co.uk/css/examples/europe-map.html

Related

change clickable coordinate image to css

Im trying to make the background image of my website clickable in certain coordinates. I dont have the ability of editing the main template as the script im using is prebuilt to add custom code into it (phpfox).
The problem i have is the code i am using is html and i need it to be css
<img url="../image/layout/bg.png" width="1920" height="1080" border="0" usemap="#Map" />
<map name="Map">
<!-- #$-:Image map file created by GIMP Image Map plug-in -->
<!-- #$-:GIMP Image Map plug-in by Maurits Rijk -->
<!-- #$-:Please do not edit lines starting with "#$" -->
<!-- #$VERSION:2.3 -->
<!-- #$AUTHOR:ImithRian -->
<area shape="rect" coords="43,36,174,803" href="http://www.battlefieldsquad.com/" />
<area shape="rect" coords="1469,99,1866,225" href="http://www.battlefieldsquad.com/index.php?do=/battlefield4/" />
<area shape="rect" coords="1564,457,1793,619" href="http://www.battlefieldsquad.com/index.php?do=/pages/3/" />
<area shape="rect" coords="1597,657,1773,878" href="http://www.esl.eu/eu/team/7931638/" />
</map>
Any suggestions ?

I can't think of a pure css-Solution. But if you want to put the image into a div as background,
you can get the position of a click relativ to your site via jQuery
HTML:
<div class="background">
Some content and a background image
</div>
Javascript:
$('.background').click(function(event){
console.log(event.pageX + " " + event.pageY);
//at some coordinate do something (e.g. go to another site)
});

As far as I know, the coordinates for an image map is just an html feature, not available as a style rule in css. What you can do if you want to change the values of the coordinates without having access to the html is reaching the element via javascript and performing the modifications then. I can provide you that code if you are interested in doing it that way.
This is the way you can tackle that with javascript (THE FIDDLE HERE)
Let's say you have a world map and you have defined a clickable link for the continents: North America, South America, Europe and Asia, Africa.
<img src="http://3.bp.blogspot.com/--Qn8gNCWlUc/UVhKBl5o5aI/AAAAAAAACYI/wMLgckCYQIs/s1600/Screen+Shot+2013-03-31+at+12.59.10+AM.png" border="0" usemap="#Map" />
<map name="Map">
<area shape="rect" title="north america" coords="43,36,174,803" href="http://www.battlefieldsquad.com/" border="2" />
<area shape="rect" title="south america" coords="1469,99,1866,225" href="http://www.battlefieldsquad.com/index.php?do=/battlefield4/" />
<area shape="rect" title="eurasia" coords="1564,457,1793,619" href="http://www.battlefieldsquad.com/index.php?do=/pages/3/" />
<area shape="rect" title="africa" coords="1597,657,1773,878" href="http://www.esl.eu/eu/team/7931638/" />
</map>
<br /><br />
<button type="button" id="fixer">Fix this mess!</button>
When you hover the mouse on the map you notice that just the shape for North America is there and in a wrong position (a tip shows up after a second).
Bellow the map you have a button to fix that. That button execute this code:
document.getElementById("fixer").onclick=function(){
var coords = ["70,100,400,320", "320,350,425,580", "510,100,1050,300", "480,300,680,500"];
var mapper = document.getElementsByTagName("area");
for(var i = 0, j = mapper.length;i < j;i++){
mapper[i].coords = coords[i];
}
}
And once you press the button you can hover the mouse then on the continents and check they are showing up now and in the right position, because the js code changes the coordinates of each shape:
var coords = ["70,100,400,320", "320,350,425,580", "510,100,1050,300", "480,300,680,500"];
That's an array with the right coordinates for each area shape from top to bottom.
The rest of the code is to set up the coordinates. You just have to edit the above line to meet your own coordinates.
I hope it helps. And by the way, if you are finally going to use this approach, you might want to add the tag javascript to your question. Regards.

Set hyperlinks to certain sections of the same picture? (HTML)

I want to have certain parts of the same picture hyperlinked to different webpages
Is there a way I can do this with javascript coordinates or any other way?

You can do it with the HTML MAP tag, for example:
<img src="http://www.w3.org/html/logo/downloads/HTML5_Logo_512.png"
width="512" height="512" alt="Logo" usemap="#logomap"/>
<map name="logomap">
<area shape="rect" coords="0,0,256,512"
href="javascript:alert('left')" alt="Left">
<area shape="rect" coords="256,0,512,512"
href="javascript:alert('right')" alt="Right">
</map>
Here's fiddle to try it out. Clicking on the left side of the image will show a Javascript alert that says left, on the right side it will show right.

Image map browser compatibility and imagemapster

I'm using ImageMapster to simply modify an image map on hover. However, I'm encountering some issues both with my image map and with the imagemapster plug in. My problems are:
1) Even though I've defined a height and width for my image, its size seems to change across browsers. In Chrome, the defined polygons are the perfect size, but in Firefox they are way too small.
2) For some reason, the ImageMapster plugin is not working in Chrome.
Below is my code:
<script type="text/javascript">
$(document).ready(function() {
$('#waterfall').mapster({
singleSelect: true,
clickNavigate: true,
fill: true,
fillColor: '000000',
fillOpacity: 0.5,
});
});
</script>
<div class="chartmap">
<img id="waterfall" src="waterfall_diagram/waterfall.png" width="650" height="72" usemap="#water" alt="Waterfall Methodology Map">
<map name="water">
<area shape="poly" coords="6,3,72,3,96,37,72,69,4,69,30,37,6,3" href="waterfall_project_initiation.html" alt="Project Initiation">
<area shape="poly" coords="75,3,165,3,188.5,37,164,69,74,69,100,37,75,3" href="waterfall_demand_management.html" alt="Demand Management">
<area shape="poly" coords="167,3,236.5,3,261,37,236.5,69,167,69,192,37,167,3" href="waterfall_definition.html" alt="Definition">
<area shape="poly" coords="240,3,326,3,350,37,326,69,240,69,264,37,240,3" href="#" alt="Requirements Analysis">
<area shape="poly" coords="329,3,380,3,405,37,380,69,329,69,353,37,329,3" href="#" alt="Design">
<area shape="poly" coords="384,3,430,3,455,37,430,69,384,69,408,37,384,3" href="#" alt="Build">
<area shape="poly" coords="434,3,483,3,509,37,484,69,433,69,458,37,434,3" href="#" alt="Test">
<area shape="poly" coords="487,3,557,3,583,37,558,69,488,69,511,37,487,3" href="#" alt="Deployment">
<area shape="poly" coords="561,3,621,3,646,37,621,69,561,69,586,37,561,3" href="#" alt="Closure">
</map>
</div>
Here's a demo: http://jsfiddle.net/t6K8X/5/
If you run it in Chrome, a click will cause outlines to come up around the image and you will see that the polygons are the correct size. However, nothing will occur on hovering like it should. In Firefox, hovering will cause the darker polygons to appear, but they will be way too small.
Any suggestions are much appreciated. Thank you!!!

In chrome ImageMapster is not loading. See the script errors:
Refused to execute script from
'https://raw.githubusercontent.com/jamietre/ImageMapster/
e08cd7ec24ffa9e6cbe628a98e8f14cac226a258/dist/jquery.imagemapster.min.js'
because its MIME type ('text/plain') is not executable,
and strict MIME type checking is enabled.
In Firefox, which apparently cares less about this stuff, it is loading, but the image map does not match the size at which you are displaying the image.
The image itself is 1024x72 pixels. You are displaying it at 650x72 pixels. ImageMapster, by default, assumes that the imagemap matches the native size of the image, and as a result, is scaling the map you provided down by about 40%.
There are several ways to fix this.
You can provide an imagemap that matches the native image, and let ImageMapster do its thing.
You can resize the image to match your existing imagemap & the display size.
You can disable the map scaling functionality with the scaleMap option:
http://jsfiddle.net/LgFn7/
scaleMap: false

Jump to a specific location on an image map

I have a big image with an HTML <map>, and I want to jump to a particular region on that image. I have used the <area /> tag for marking the locations
Take a look at the code :
<img src="demo_files/k3.png" id="target" alt="Map" usemap="#powerpuffgirls" />
<map name="powerpuffgirls">
<area shape="rect" coords="624,137,671,167" href="#" id="ppg" title="The Powerpuff Girls" alt="The Powerpuff Girls" />
<area shape="rect" coords="99,2685,161,2723" href="#" name="ppg1" title="The Powerpuff Gidrls" alt="The Powerpuff sGirls" />
</map>
however, I am unable to move to any region on the image.
Edit: Any other approach for moving to an image's particular region would be great !!

Try this link
$('a.links').click(function(e){
e.preventDefault();
var coor = $(this.hash).attr('coords').split(',');
$('html,body').scrollTo(coor[0], coor[1]);
});
i have used the plugin scrollTo
the script will prevent default function of a tag and will get the coordinates attribute from the area tag with the id from the href attribute and calculate the positions and scroll to that position

Check this demo i have created...
Try to navigate the areas by id...
<div>Go to one Go to two</div>
You have to play with the area coordinates in it...
http://jsfiddle.net/D9W6C/

Change background of mapped image hotspot on mouseover

I have an image map of 3 polygons. The actual image hotspots are complex shapes consisting of multiple curves and edges.
<img src="/images/map.gif" alt="HTML Map"
border="0" usemap="#map"/>
<map name="map">
<area shape="poly"
coords="74,0,113,29,98,72,52,72,38,27"
href="index.htm" alt="area1" />
<area shape="poly"
coords="22,83,126,125"
href="index.htm" alt="area2" />
<area shape="poly"
coords="73,168,32"
href="index.htm" alt="area3" />
</map>
I've created a duplicate of map.gif called map_over.gif rendered in a different color. What I'd like to do is change the area within the clickable hotsposts of map.gif to map_over.gif on mouse hover. Any suggestions as to how I could accomplish this with CSS or Javascript? Thanks in advance.

aThis is an easy one.
html:
<img src="/images/map.gif" alt="HTML Map" border="0" usemap="#map" id="mappedImage" />
css:
img#mappedImage:hover {
background: url("/images/map2.gif") no-repeat scroll 0 0 transparent;
}
Should do the trick. You could use the background-image: url("/images/map2.gif") as well - background provides more options at once like background-repeat, background-position etc.
As for any questions about css I can recommend http://www.css4you.de/borderproperty.html as a good reference site with good examples.

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