From LimeSurvey Manual
With the introduction of the new theming system in LimeSurvey 3.x (planned: July, 2017), the process of templating and creating subtemplates for your surveys has become easier.
This guide functions now (june 2017) as a starter for people trying to understand & explain the system of creating templates.
What is templating?
Templating is adapting the way your surveys are presented to the respondent. Each survey refers to a template, which holds files that influence the visual appearance of your survey, as well as some aspects of the behaviour of the survey. For example: in a template the font and colors of your survey are defined, as well as the position of elements on the page.
There are three ways for creating a new template:
- Copy & Adjust: copy a template that works to your /uploads/themes directory and adjust what you want to be different.
- Build from scratch: build your own template from zero. Sometimes people begin with Copy & Adjust, but they end up building a new template from scratch. Or the other way around.
- Subtemplating: start with a good working template and override in a subtemplate everything that you want to be different from the "mother" template
And next to all these above methods, there is now also a way of templating individual questions, using the question-templating method.
Copy & Adjust
This is the "classical" way: this was already possible in previous versions of LimeSurvey. This is the easiest for people that only want to change small things in the survey (colors, margins, paddings) and for people that do not have ftp-access to their LimeSurvey installation.
1. Using the template editor For very small changes and for people that do not have ftp-access to their LimeSurvey installation.
2. Uploading via ftp Easier for larger changes, but you need ftp-access to the uploads/templates directory.
You can mix methods here: for example you can use the template editor to download a template and then install it in a local installation of LimeSurvey where you can experiment with it and adjust it to your needs. Afterwards you can choose to upload it via FTP or to zip it and upload the zip-file through the template editor.
Typical way of working
- copy the template and give it a new name. For example copy "default" to "my-template".
- adjust what you want in "my-template"
- test this on the survey(s) that will refer to "my-template"
- make online available
- refer to "my-template" from the surveys that need the changes that are in "my-template"
Build from scratch
This has always been possible, but with the completely rewritten base templates and the new Twig-engine for templating, this will be much easier.
Typical way of working
- learn from the best templates that you can find
- use other's code where possible and appropriate
- write .css, .js and .twig files
- test & tune
- and hopefully: make available for the community
This is a new way of working, introduced in LimeSurvey 3.0: in this method you create a subtemplate that refers to a "mother"-template. You only specify what needs to be different, for the rest all specifications from the mother template are used. This opens up several possibilities (and risks):
- when you use a core template as the mother-template and LimeSurvey updates the core template, this update will also affect your sub-template, except where you have overridden features.
- you can create a subtemplate with very little specification, thereby making this a quick process.
- you can also make sub-subtemplate, whereby you extend a subtemplate. Question for LouisGac: is there a limit to levels of sub-templating?
The way to invoke the subtemplating feature is adapting the config.xml file of your sub-template. For example the following statements are in the config.xml of the ubuntu_orange template, which is a sub-template (it "extends") of default.
<config> <metadatas> <name>Ubuntu Orange</name> <extends>default</extends> ---- ---- </metadatas>
Question for LouisGac: will sub-templating also be possible via the template editor or will the developer have to use FTP?
Typical way of working
- determine which template of the core templates or the custom template is closest to what you want and/or which is the best to use as the basis for your template
- extend by configuring the config.xml: include/exclude files from the mother template, adapt .twig-, .css- and/or .js-files.
- test thoroughly
Advantages of subtemplating
Disadvantages of subtemplating
Your LimeSurvey installation always has at least one core template, which is called default. This is the fall back theme, for example for when you load a survey from someone else and that template refers to a custom template that is not available in your installation.
Core templates are in: /templates (please note: there is also a map called /themes, but this one holds admin-themes, the themes that are used to render the administration pages of LimeSurvey). Your own custom templates (independent of the way that they are created) will be placed in /upload/templates
In the root directory of your template (for example: /templates/default) you will find the file config.xml. This file defines what your template will using for rendering your survey pages.
You might think that all .twig-, .css- and .js-files reside in your template, but that is not true. Even if you template contains none of these files, LS will supply the following files from core:
(@Denis Chenu: can you state here which files are served by default from core (when no plugins are activated))
Plugins may also serve their own .css files. (@Denis Chenu: Is that true?)