Dancer::Plugin::Device::Layout::Example - Sample real life web application.


This example should help you understand how Dancer::Plugin::Device::Layout works and how you can integrate the plugin in your existing Dancer web application.


You have created a realy cool web application which looks great on desktop computers (big screens) but is nearly unreadable on mobile devices such as smartphones or tablets because of its small display size? This is where Dancer::Plugin::Device::Layout can help you with.

Dancer::Plugin::Device::Layout provides a subroutine that detects the remote device on the base of the user agent of every web request. This subroutine returns in a array/hash context the Dancer/template option key value pair for the layout.

With Dancer::Plugin::Device::Layout default settings Dancer::Plugin::Device::Layout/device_layout is assigning the layout 'tablet' to tablet devices, 'mobile' to smartphones and 'normal' to all other devices. So you need theese three layouts within 'views/layouts'.

The layouts can help you easily setup device (mostly screen size) optimized looks for your web application.


MyApp is the web application used for this example.

Import plugin

You need to load the plugin first ofcourse.

    package MyApp;
    use Dancer ':syntax';
    use Dancer::Plugin::Device::Layout;
    our $VERSION = '0.1';
    get '/' => sub {
        template 'index';

Update Dancer/template calls

You need to update every Dancer/template call.

    package MyApp;
    use Dancer ':syntax';
    use Dancer::Plugin::Device::Layout;
    our $VERSION = '0.1';
    get '/' => sub {
        my $tokens  = {};
        my $options = { device_layout };
        template 'index', $tokens, $options;

Update config.yml

Now you can modify the defaults of Dancer::Plugin::Device::Layout by update your config.yml.

    # This is the main configuration file of your Dancer app
    # env-related settings should go to environments/$env.yml
    # all the settings in this file will be loaded at Dancer's startup.
    # Your application's name
    appname: "MyApp"
    # The default layout to use for your application (located in
    # views/layouts/
    layout: "main"
    # when the charset is set to UTF-8 Dancer will handle for you
    # all the magic of encoding and decoding. You should not care
    # about unicode within your app when this setting is set (recommended).
    charset: "UTF-8"
    # template engine
    # simple: default and very basic template engine
    # template_toolkit: TT
    template: "simple"
    # template: "template_toolkit"
    # engines:
    #   template_toolkit:
    #     start_tag: '[%'
    #     end_tag:   '%]'
    # Here comes the Dancer::Plugin::Device::Layout configuration.
        normal_layout:    normal
        mobile_layout:    mobile
        tablet_layout:    tablet
        no_tablet:        0
        tablet_as_mobile: 0
        no_mobile:        0


Now you are done with integrate Dancer::Plugin::Device::Layout in your Dancer web application.

4 POD Errors

The following errors were encountered while parsing the POD:

Around line 20:

alternative text 'Dancer/template' contains non-escaped | or /

Around line 25:

alternative text 'Dancer::Plugin::Device::Layout/device_layout' contains non-escaped | or /

Around line 53:

alternative text 'Dancer/template' contains non-escaped | or /

Around line 55:

alternative text 'Dancer/template' contains non-escaped | or /