Question

Add onMouseOver to <cfimage> output / scale images to fit onMouseover?

Asked by: stu215

Im resizing my images to create thumbnails using the <cfimage> tag but I want them to appear larger in a div
elsewhere on my page ( proportionally scaled ) onMouseOver.

The following code works for re-sizing the images ::
------------------------------------------------------------------------------------------------------------------------------------

<cffunction name="squareThumbnail" access="private" returntype="void">
      <cfargument name="image" required="true" />
      <cfargument name="size" required="true" />

      <cfset var half = int(arguments.size / 2) />
      <cfset var fromX = 0 />
      <cfset var fromY = 0 />

      
      <cfif arguments.image.height gt arguments.image.width>

            <cfset imageResize(arguments.image, arguments.size, '') />
            <cfset fromX = arguments.image.Height / 2 - half />
            <cfset imageCrop(arguments.image, 0, fromX, arguments.size, arguments.size) />

      
      <cfelseif image.width gt image.height>

            <cfset imageResize(arguments.image, '', arguments.size) />
            <cfset fromY = arguments.image.Width / 2 - half />
            <cfset imageCrop(arguments.image, fromY, 0, arguments.size, arguments.size) />

      
      <cfelse>

            <cfset imageResize(arguments.image, '', arguments.size)>
            <cfset imageCrop(arguments.image, 0, 0, arguments.size, arguments.size)>
      </cfif>

      <cfimage action="writetobrowser" source="#arguments.image#" />

</cffunction>
------------------------------------------------------------------------------------------------------------------------------------

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Asked On: 2008-03-27 at 14:08:40ID23275673
Tags: coldfusion
,; cfimage
,; onmouseover
,; scaletofit
Topics: Cold Fusion Markup Language
,; ColdFusion Studio
,; Adobe Dreamweaver
Participating Experts: 1
Points: 200
Comments: 10

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Answers

by: ZvonkoPosted on 2008-03-30 at 13:09:24ID: 21241783

The image stream function produces ONLY the image content. To controll the events for that particular image tag placement you have to add event handlers to the page that USES the image tag.

by: stu215Posted on 2008-03-31 at 08:04:57ID: 21246000

how would i do that?

by: ZvonkoPosted on 2008-03-31 at 09:24:12ID: 21246821

What do you want to do?
In HTTP you cannot do <img> tag handling inside the image content stream.
So what is your question when you ask "how would i do that?"
What do you want to do? Do you want to write an <img> tag with onMouseOver event handler?
Or do you still ask how to stream out that event handler together with the image content bytes?

Do you really ask how to write an <img onMouseOver="showImage(this)" > tag?

by: stu215Posted on 2008-03-31 at 11:13:19ID: 21247714

The following code pulls my images from a database.
- Creates a thumbnail on the left and a mouseover that shows the full image in a div on the right.
( however it does not crop images to proportion and the full images are larger than the page. )

*** I'd like to use the function to create the thumbnails instead as it proportionally crops the images
and keep the same functionality where a user could mouseover to see the main image. I would also like for the main image to be proportional ( to a pre-specified size/ fit to window since some of the images are really big ).

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
 
<style>
 
#myDiv{
     border-bottom: thin;
     border-bottom-style: inset;
     border-left: thin;
     border-left-style: inset;
     border-right: thin;
     border-right-style: inset;
     border-top: thin;
     border-top-style: inset;
     background-color: White;
     width: 175px;
     height: 500px;
     overflow: scroll;
}
 
#myPic{
     border-bottom: thin;
     border-bottom-style: inset;
     border-left: thin;
     border-left-style: inset;
     border-right: thin;
     border-right-style: inset;
     border-top: thin;
     border-top-style: inset;
     background-color: White;
     width: 100%;
     height: 500px;
     overflow: scroll;
}
 
</style>
 
 
<!--- Create a square thumbnail --->
<cffunction name="squareThumbnail" access="private" returntype="void">
	<cfargument name="image" required="true" />
	<cfargument name="size" required="true" />
 
	<cfset var half = int(arguments.size / 2) />
	<cfset var fromX = 0 />
	<cfset var fromY = 0 />
	
	<!--- Resize image by height if width is greater then height --->
	<cfif arguments.image.height gt arguments.image.width>
	 
		<cfset imageResize(arguments.image, arguments.size, '') />
		<cfset fromX = arguments.image.Height / 2 - half />
		<cfset imageCrop(arguments.image, 0, fromX, arguments.size, arguments.size) />
	 
	<!--- Resize image width if height is greater then width --->
	<cfelseif image.width gt image.height>
	 
		<cfset imageResize(arguments.image, '', arguments.size) />
		<cfset fromY = arguments.image.Width / 2 - half />
		<cfset imageCrop(arguments.image, fromY, 0, arguments.size, arguments.size) />
	
	<!--- Already Square, can do a resize with no cropping --->
	<cfelse>
	
		<cfset imageResize(arguments.image, '', arguments.size)>
		<cfset imageCrop(arguments.image, 0, 0, arguments.size, arguments.size)>
	</cfif>
	
	<cfimage action="writetobrowser" source="#arguments.image#" />
 
</cffunction>
 
<body onLoad="self.focus();" topmargin="1" leftmargin="1">
 
 
<cfquery name="getImages" datasource="WHouse" timeout="360">
   SELECT * FROM wh_Images
   WHERE wID='144'
</cfquery>
 
<script>
function myFunc (myName){
//	document.GetElementByID("myPic").innerHTML="<img src='/ServerPages/WareHouseInv/WHImages/"+ myPic +"'>";
//	document.getElementByID("myPic").innerHTML="<div id='myPic'>TEST</div>";
//	alert(myName);
	var myInsert="<img src='/ServerPages/WareHouseInv/WHImages/"+ myName +"'>";
	document.getElementById("myPic").innerHTML=myInsert;
}
</script>
 
<table bgcolor="FFFFFF" border="0" width="100%">
	<tr vAlign="top">
		<td width="150px">
			<div id="myDiv">
			<cfoutput query="getImages">
 
					<cfimage action="read" source="#expandPath('./')##ImageName#" name="image" />
					<cfset squareThumbnail(image, 150) />
					
				<img src="/ServerPages/WareHouseInv/WHImages/#ImageName#" onMouseOver="myFunc('#ImageName#');" height="150" width="150">
			</cfoutput>
			</div>
		</td>
		<td>
			<div id="myPic">
				<cfoutput>
 
                    
					<img src="/ServerPages/WareHouseInv/WHImages/#getImages.ImageName[1]#">
				</cfoutput>
			</div>
		</td>
	</tr>
</table>
 
</body>
</html>

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Select all Open in new window

by: stu215Posted on 2008-03-31 at 13:00:14ID: 21248605

I hope that kinda explains what I'm looking for a bit better... I just dont know how to achieve the results I want.

by: ZvonkoPosted on 2008-04-01 at 11:16:53ID: 21256590

Does this look good for you:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Zvonko &#42;</title>
</head>
<style>
#myDiv{
     border-bottom: thin;
     border-bottom-style: inset;
     border-left: thin;
     border-left-style: inset;
     border-right: thin;
     border-right-style: inset;
     border-top: thin;
     border-top-style: inset;
     background-color: White;
     width: 175px;
     height: 500px;
     overflow: scroll;
}
 
#myPic{
     border-bottom: thin;
     border-bottom-style: inset;
     border-left: thin;
     border-left-style: inset;
     border-right: thin;
     border-right-style: inset;
     border-top: thin;
     border-top-style: inset;
     background-color: White;
     width: 100%;
     height: 500px;
     overflow: scroll;
}
</style>
<body onLoad="self.focus();" topmargin="1" leftmargin="1">
 
 
<cfquery name="getImages" datasource="WHouse" timeout="360">
   SELECT * FROM wh_Images
   WHERE wID='144'
</cfquery>
 
<script>
function showImg(theImg){
  document.images.bigImg.src = theImg.src;
}
</script>
<table bgcolor="FFFFFF" border="0" width="100%">
	<tr vAlign="top">
		<td width="150px">
			<div id="myDiv">
			<cfoutput query="getImages">
 			<img src="#ImageName#" onMouseOver="showImg(this);" width="150">
			</cfoutput>
			</div>
		</td>
		<td>
			<div id="myPic">
 
				<cfoutput>
					<img name="bigImg" src="#getImages.ImageName[1]#">
				</cfoutput>
			</div>
		</td>
	</tr>
</table>
</body>
</html>

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Select all Open in new window

by: stu215Posted on 2008-04-04 at 08:25:21ID: 21282717

I was hoping to keep the thumbnails all the same size / square but the main image that appears on the right is not getting scaled to fit the div either ( height = 500 width=auto )...?

------------------------------------------------------------------------------------------------------------------------
-- The cfimage does such a nicer job at making the thumbs and keeps them looking clear. Is there no way to add "onmouseover" using arguments or anything?

by: stu215Posted on 2008-04-09 at 13:42:51ID: 21318868

I still cant get the thumbs to come out right proportionally square.
( the way the cfimage tag works with cropping )

-- I still think there has to be some way to add a mouseover to cfimage... Anyone?

I fixed my main image size by adding :
--------------------------------
<style>
.myImg{
width: auto;
height: 475px;
}
</style>
---------------------------------
Changed this line to:
var myInsert="<img class='myImg' src='/ServerPages/WareHouseInv/WHImages/"+ myName +"'>";

And changed this line to :
<img class="myImg" src="/ServerPages/WareHouseInv/WHImages/#getImages.ImageName[1]#"/>
---------------------------------

by: ZvonkoPosted on 2008-04-11 at 15:11:27ID: 21338617

Take this script:
<script>
function showImg(theSrc){
document.images.bigImg.src = theSrc;
}
</script>

And use it like this:

<cfoutput query="getImages">
  <cfimage action="read" source="#expandPath('./')##ImageName#" name="image" />
  <cfset squareThumbnail(image, 150) />
  <script>document.images[document.images.length-1].onmouseover=function(){showImg('#ImageName#')} </script>
</cfoutput>

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Select all Open in new window

by: ZvonkoPosted on 2008-04-11 at 15:17:54ID: 21338650

The image name bigImg will work only if you name it, like this:
                        <cfoutput>
                              <img name="bigImg" src="#getImages.ImageName[1]#">
                        </cfoutput>

20120131-EE-VQP-002

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Question

Add onMouseOver to <cfimage> output / scale images to fit onMouseover?

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coldfusion

cfimage

onmouseover

scaletofit

Cold Fusion Markup Language

ColdFusion Studio

Adobe Dreamweaver

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