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Example: image link form

Image links are internal links that provide a link image instead of a link text that the user can click on to go to the link target.

If, on the other hand, a mouse-sensitive image is to be created, CMS_INPUT_IMAGEMAP should be used.

The following shows an example of a form and the syntax for corresponding output for a link that leads to a different page in the project and, if necessary, to a section of that page. In this case, the user sees a link image instead of a link text.

Display (SiteArchitect)

Explanation

	Use	Input component in the following code example
1.	Selection of a page from the site store and, if applicable, of a section on this page to which the link leads when the user clicks on it. (Mandatory field, see Introduction)	lt_reference
2.	Selection of an image from the media store that the user can click on (instead of a link text). (Mandatory field, see Introduction)	lt_image

Image links are also one way you can integrate images directly into continuous text via CMS_INPUT_DOM or CMS_INPUT_DOMTABLE. In this case, no link target is required; only the image to be displayed is required.

Form

<CMS_MODULE>

   <FS_REFERENCE name="lt_reference" useLanguages="no">
     <FILTER>
       <ALLOW type="pageref"/>
     </FILTER>
     <LANGINFOS>
       <LANGINFO lang="*" label="Link target"/>
       <LANGINFO lang="DE" label="Verweisziel"/>
     </LANGINFOS>
     <PROJECTS>
       <LOCAL name=".">
         <SOURCES>
           <FOLDER name="root" store="sitestore"/>
         </SOURCES>
       </LOCAL>
     </PROJECTS>
   </FS_REFERENCE>

   <FS_REFERENCE name="lt_image" useLanguages="no">
     <FILTER>
       <ALLOW type="picture"/>
       <HIDE type="file"/>
     </FILTER>
     <LANGINFOS>
       <LANGINFO lang="*" label="Link image"/>
       <LANGINFO lang="DE" label="Verweisgrafik"/>
     </LANGINFOS>
     <PROJECTS>
       <LOCAL name=".">
         <SOURCES>
           <FOLDER name="root" store="mediastore"/>
         </SOURCES>
       </LOCAL>
     </PROJECTS>
   </FS_REFERENCE>

 </CMS_MODULE>

Form configuration information:

The lt_image input component (FS_REFERENCE type) is used to select the link image. By entering

<SOURCES>
   <FOLDER name="root" store="mediastore"/>
</SOURCES>

the display in the selection dialog is limited to the media store; using

<FILTER>
   <HIDE type="file"/>
</FILTER>

hides files from the selection dialog so that only images are available for selection.

Output

The following shows examples of only the minimum amount of code that is needed for suitable adaptation in a production project. Thus, for instance, a Not Empty check (e.g. $CMS_IF(!lt_reference.isEmpty)$ is not performed. Without this check, however, generation errors could occur in the production project.

Links are generally output in HTML using the following syntax:

<a href="[Linktarget]">Linktext]</a>

The value of lt_reference is used for the link target in the HTML output via the link template. The value of lt_image is used for the link text:

<a href="$CMS_REF(lt_reference)$"><img src="$CMS_REF(lt_image)$"></a>

If the size of the image needs to be adapted, a suitable resolution needs to be entered (e.g. a height of 10 to 12 pixels). This can be entered for the link image output using the resolution attribute (for more information, see $CMS_REF(....)$ or ref(...)). Alternatively, the height and width can also be entered using the HTML attributes height and width.

Content from the “Description” field of a media store image can be output using the mandatory alt HTML attribute.

For information on how to jump to the page section selected by the editor in a form (anchor), see Internal links.

A simple example of the link output could ultimately look like the following:

 <a href="$CMS_REF(lt_reference)$">
         <img src="$CMS_REF(lt_image, resolution:"inline")$" alt="$CMS_VALUE(ref(lt_image).getDescription())$">
 </a>

 <a href="$CMS_REF(lt_reference)$">
         <img src="$CMS_REF(lt_image)$" height="12" alt="$CMS_VALUE(ref(lt_image).getDescription())$">
  </a>

If only an image is to be integrated into the text using this link type, no link target is required, which means that the <a> tag (first and third line in the code example) can be omitted.

Schema

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