After discovering that the control panel in Google Maps is actually one whole image, I realized that clicking on different parts of it can result in different actions. Now I'm curious about how to incorporate this feature into my own project.
After discovering that the control panel in Google Maps is actually one whole image, I realized that clicking on different parts of it can result in different actions. Now I'm curious about how to incorporate this feature into my own project.
There's a single image that serves as the backdrop for several objects positioned in various ways. These are commonly referred to as sprites.
The Javascript onclick event object holds valuable information about click coordinates. Below is a simple example demonstrating how to extract and utilize this data:
Adapted from:
<html>
<head>
<script language="JavaScript">
function point_it(event){
pos_x = event.offsetX?(event.offsetX):event.pageX-document.getElementById("pointer_div").offsetLeft;
pos_y = event.offsetY?(event.offsetY):event.pageY-document.getElementById("pointer_div").offsetTop;
document.getElementById("cross").style.left = (pos_x-1) ;
document.getElementById("cross").style.top = (pos_y-15) ;
document.getElementById("cross").style.visibility = "visible" ;
document.pointform.form_x.value = pos_x;
document.pointform.form_y.value = pos_y;
}
</script>
</head>
<body>
<form name="pointform" method="post">
<div id="pointer_div" onclick="point_it(event)" style = "background-image:url('sun.jpg');width:500px;height:333px;">
<img src="point.gif" id="cross" style="position:relative;visibility:hidden;z-index:2;"></div>
You pointed on x = <input type="text" name="form_x" size="4" /> - y = <input type="text" name="form_y" size="4" />
</form>
</body>
</html>
One way to make parts of an image clickable is by using HTML Image Maps. These maps allow you to define specific areas within the image that can act as links.
To learn more about creating image maps, check out these helpful resources:
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