class-textobject Nov 14, 2009 / Updated: Jan 19, 2015
Supports files of the following types:
The contents of these files are "dumpped" into a <span>...</span> sized to a 24x36 ratioed box based on your theme "image size" option. This has a class of "textobject" so it can be styled.
What this plugin really is for is to serve as a model of how a plugin can be made to handle file types that zenphoto does not handle natively.
Some key points to note:
- The naming convention for these plugins is class-<handler class>.php.
- The statement setting the plugin_is_filter variable must be near the front of the file. This is important as it is the indicator to the Zenphoto plugin loader to load the script at the same point that other object modules are loaded.
- These objects are extension to the zenphoto "Image" class. This means they have all the properties of an image plus whatever you add. Of course you will need to override some of the image class functions to implement the functionality of your new class.
- There is one VERY IMPORTANT method that you must provide which is not part of the "Image" base class. The getBody() method. This method is called by template-functions.php in place of where it would normally put a URL to the image to show. This method must do everything needed to cause your image object to be viewable by the browser.
So, briefly, the first three lines of code below are the standard plugin interface to Admin. Then there are calls on addPlginType(<file extension>, <Object Name>); This function registers the plugin as the handler for files with the specified extension. If the plugin can handle more than one file extension, make a call to the registration function for each extension that it handles. The rest is the object class for handling these files.
The code of the object instantiation function is mostly required. Plugin images follow the lead of class-video in that if there is a real image file with the same name save the suffix, it will be considered the thumb image of the object. This image is fetched by the call on checkObjectsThumb(). There is also code in the getThumb() method to deal with this property.
Since text files have no natural height and width, we set them based on the image size option. This happens after the call PersistentObject(). The rest of the code there sets up the default title.
getThumb() is responsible for generating the thumbnail image for the object. As above, if there is a similar named real image, it will be used. Otherwise [for this object implementation] we will use a thumbnail image provided with the plugin. The particular form of the file name used when there is no thumb stand-in image allows Zenphoto to choose an image in the plugin folder.
Included in the Zenphoto release.