How to Switch Logos and Images Based on a Control Box Selection

This article describes how to change images (e.g., brand logos) shown on a Page based on a Combo Box selection. The post contains the steps required to create a Page like this:

Requirements

A Control Box (see How to Create a Combo Box Filter or How to Create a List Box Filter).
A Conditional Image Visualization that changes based on the Control Box selection. See How to Create a Pictograph Conditional Image for further details.
The URLs of the images you wish to display.

Method

From the toolbar, go to Control > Combo Box (Drop-Down) or List Box.
Click on the page to place the control.
With the control selected, go to Properties > Control > Item List and input the labels (e.g., brand names) you wish to appear in the list. All items in the list should be separated by a semi-colon (;).
Still, in the Properties, go to General > General > Name and input the desired name (e.g., brand.switch) to use later in the R code.
In the toolbar, select Calculation > Custom Code.
Click on the page to place the output.
In the code panel, input the desired name of the calculation (e.g., current.brand) and set it to equal your combo box (i.e., brand.switch):
```
current.brand = brand.switch
```
To check that the code is working, change the menu selection, and you should see the selection in the output update.
Click Calculate.
From the toolbar, select Visualization > Pictograph > Conditional Image.
Change Data > Data Source > Data source to Use an Existing R Output in Properties .
Click into Data > Data Source > Input data and select the calculation that you created in Step 7 (in this example, it is called current.brand).
From the Format tab, update Image type to Custom Images.
Paste the URL of a default image. This image will appear in case no selections are made at the combo box.
Each value contained in the combo box should appear in the Thresholds (ie, Threshold 1: Displayr; Threshold 2: Q).
In each of the corresponding Image fields (Image 1, Image 2, etc.), enter the appropriate Image URL.