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ArturoMuñoz
Employee
Employee

Custom Themes is one of the new features shipped with February release so make sure you are updated before trying to come up with your own.

 

To create a new theme, first we need to understand what exactly is a theme and what it can do for us. A custom theme is a collection of files stored in a folder, it must contain a definition (QEXT) file, a main JSON file, and optionally any other assets you might need to support the custom theme such as CSS files, custom font files, images, etc.

 

Custom themes let users to quickly apply different levels of customization to their apps, some of you might be interested in having your custom color palletes, while someone else might just need bigger font size, both can be achieved with Custom Themes. Theme authors can target individual visualization objects via JSON and/or use a custom CSS to modify the sheet styles.

 

From Qlik Help

 

The custom styles can be defined in two ways:

  • In the JSON file you define the style for the individual visualization types, for example bar charts and line charts.
  • CSS styling is more general and flexible. You can, for example, style sheets, visualizations and extensions.

 

Creating a simple custom theme

 

I'll be using Qlik Sense Desktop for this example, please check the help page for instructions on how to install a Custom Theme in Qlik Sense Server.

 

  • Go to your extensions folder: C:\Users\[username]\Documents\Qlik\Sense\Extensions
  • Create a new folder, I'll call mine theme-helloworld
  • Create a new file and rename it to theme-helloworld.qext. The QEXT file is a definition file that contains a few lines, where only name and type are the only mandatory lines.

 

 

 

{
  "name": "Hello World theme",
  "description": "My first custom theme",
  "type": "theme",
  "version": "1.0.0",
  "author": "Arturo Muñoz"
}

 

 

 

  • Now, it's time for the JSON file. Create a new file, name it theme.json
  • Edit the theme.json file with your favorite text/code editor
  • My advice is to start your theme with the sample code you can find in Qlik Help so you can familiarize with JSON and it's properties:

 

 

{
  "_inherit": true,
  "_variables" : {
    "@greenColor" : "#61a729",
    "@text": "#4c4c4c"
  },
  "color": "@text",
  "fontSize": "12px",
  "object" : {
    "title": {
      "main": {
      "fontSize" : "16px"
      }
    }
  },
  "dataColors": {
    "primaryColor": "@greenColor"
  }
}

 

 

  • The JSON file will change the primary color of your charts from Qlik dark blue to the custom green as defined in the variable at line 4 and will also modify the charts title to a font size of 16 pixels.

    This is a simple example but there are much more you can do with the JSON file, you could for example, define new color schemes for measures, change the axis', labels, legends font size and color and much more.

    Actually you could even load your custom CSS through the JSON file so you can target and hack any predefined style within your app, so you could modify object paddings, change font family, and so forth.

 

If you've followed the steps above you should have something like:

Custom-Themes.png

 

How to activate a Custom Theme?

 

Check how to apply a Custom Theme to your app in the animation below

 

CT.gif

 

 

 

Tips from the expert... and theme sharing!

 

I've asked my colleague Nabeel Asif for some tips since he created the Custom Theme based on Color Brewer that we are sharing  today (check the attachments). This is what he said:

 

All of our standard themes just give one sequential and one diverging gradient for measures, and two color schemes for dimensions. But you can actually define as many options as you like through the “scale” and “palettes” properties in the theme’s JSON.

 

For sequential and diverging gradients, Qlik uses seven colors to define a scheme. But you don’t actually need to specify all seven colors. Just define the two colors at the extremes, and Qlik does a nice job of calculating the rest. Of course, if you want very specific colors you can define them yourself.

 

Often apps will be designed with red representing something bad or dark colors representing higher values. To maintain this look as the user switches themes, you should follow these conventions in the JSON:

  • Diverging scales should be ordered from reddish hues to bluish hues.
  • Sequential scales should be ordered from dark to light. 

 

Please don't forget to always check Qlik Help for the most recent specifications.

 

Enjoy

42 Comments
dineshsingh
Partner - Contributor III
Partner - Contributor III

Hi Supritha,

I haven't used CSS theme yet but achieved the same requirement using the JSON method (https://help.qlik.com/en-US/sense-developer/February2018/Subsystems/Extensions/Content/CustomThemes/...) provided in custom themes (https://help.qlik.com/en-US/sense-developer/February2018/Subsystems/Extensions/Content/custom-themes...).

A snippet of the code to control label values/data is here:

"label": {

  "name": {

"color": "#ffffff"

  },

  "value": {

"color": "#ffffff"

  }

}

I hope this helps.

Thanks

Dinesh

0 Likes
7,410 Views
BI_Dev
Creator
Creator

Thanks dinesh.Do you have a JSON  file which you can share ?

I have below script as is in my JSON file and nothing works...can you please assist ?

"label": {

"name": {

  "color": "#ffffff",

   "fontSize": "20px" },

    "value": {

     "color": "#ffffff",

      "fontSize": "20px" } }

0 Likes
7,410 Views
dineshsingh
Partner - Contributor III
Partner - Contributor III

Hi Supritha,

Sorry, I didn't try before sharing the code with you as I was expecting it to work but for some reason it's not working for me as well. Please try the below.

filename: theme.json

Sample.jpg

Thanks,

Dinesh

0 Likes
7,368 Views
BI_Dev
Creator
Creator

Thank you for your time dinesh...didnt work this time too..below is my folder structure and I have the below script as is in theme.JSON file....and then I picked Custom theme in App overview...not sure what am I missing here...thank you for your time and help...highly appreciated

Custom.JPG

theme.JSON file script as is below:

"_inherit": true, 

  "fontSize": "20px",

   "object":{

    "label": {

     "name":  {

      "Color" : "#61a729", 

       "fontSize": "20px" 

},

   "vale":{

    "Color" : "#61a729", 

     "fontSize": "20px"

}

},

"barChart":{

"label":   {

  "name":    {

   "color": "#61a729",

    "fontSize": "20px"

},

    "value": {

     "color": "#61a729",

      "fontSize": "20px"

}

   }

  }

}

}

App Overview:

Custom2.JPG

0 Likes
7,368 Views
zuruprem2
Contributor II
Contributor II

Hi Supritha,

Same issue happened to me. Kindly advise if you have any solution.

0 Likes
7,368 Views
dineshsingh
Partner - Contributor III
Partner - Contributor III

Hi Supritha,

Please share your theme in a zip file so that I can have a look at the same.

Regards

Dinesh

0 Likes
7,368 Views
barryharmsen
Luminary Alumni
Luminary Alumni

A bit late to the party, but we've built a visual, online editor for Qlik Sense Themes. Check it out here: SenseTheme

Looking forward to hearing your feedback, and if you've built a cool theme we'll gladly include it in the gallery

7,368 Views
apthansh
Creator
Creator

This is really amazing !!  Great Work !!

0 Likes
7,368 Views
kkkumar82
Specialist III
Specialist III

All,

Can we change have different colors for different sheets, I was just checking a extension from "SenseThemes", in that the css file contains the sheet background color, just want to know is this possible to change background color for each sheet.

0 Likes
7,212 Views
ErikWetterberg

Sorry, that's not covered by the current version.

Erik Wetterberg

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