DynamicDropdownTV

Dynamic dropdown custom template variable for MODX Revolution.

Features

With this MODX Revolution custom template variable related dropdown template variables could be used. Each dynamic dropdown template variable could have one or more child dynamic dropdown template variables which are updated on selection of the parent dynamic dropdown template variable.

Installation

MODX Package Management

Examples

Example 1: Default processor usage (XPDO Package)

Create three Dynamic Dropdown template variables:

First

Tab	Option	Value
General Information	Name	dynamic0
Input Options	Input Type	Dynamic Dropdown
Input Options	Parent Dropdown
Input Options	Dynamic Dropdown Group	dynamicGroup
Input Options	Where	{"parent":"0"}

Second

Tab	Option	Value
General Information	Name	dynamic1
Input Options	Input Type	Dynamic Dropdown
Input Options	Parent Dropdown	dynamic0
Input Options	Dynamic Dropdown Group	dynamicGroup
Input Options	Where	{"parent":"[[+dynamic0:default=`999999999999999`]]"}

Third

Tab	Option	Value
General Information	Name	dynamic2
Input Options	Input Type	Dynamic Dropdown
Input Options	Parent Dropdown	dynamic1
Input Options	Dynamic Dropdown Group	dynamicGroup
Input Options	Where	{"parent":"[[+dynamic1:default=`999999999999999`]]"}

The names dynamicX and dynamicGroup are just examples and could be changed.

This example will add three dropdown select TVs, where you can choose MODX resources. After selecting a resource in the first TV dynamic0, the dropdown select of the second TV dynamic1 will show the childs of this resource. After selecting a resource in the second TV dynamic1, the dropdown select of the third TV dynamic2 will show the childs of this resource. If you select again a resource in the first TV dynamic0 all children of this Dynamic Dropdown TV (dynamic1 and dynamic2) will be resetted.

Example 2: Default processor usage (Input Option Values)

Create two Dynamic Dropdown template variables:

First

Tab	Option	Value
General Information	Name	dynamic0
Input Options	Input Type	Dynamic Dropdown
Input Options	Dynamic Dropdown Group	dynamicGroup
Input Options	Input Option Values	`TEST1==1

Second

Tab	Option	Value
General Information	Name	dynamic1
Input Options	Input Type	Dynamic Dropdown
Input Options	Dynamic Dropdown Group	dynamicGroup
Input Options	Input Option Values	`1::TEST1a==1a

The names dynamicX and dynamicGroup are just examples and could be changed.

This example will add two dropdown select TVs, where you can different values. After selecting a value in the first TV dynamic0, the dropdown select of the second TV dynamic1 will show related values. If you select again a value in the first TV dynamic0 all children of this Dynamic Dropdown TV (dynamic1) will be reseted.

The format for the input option values is: Parentvalue::Key==Value||…||Key==Value##Parentvalue::Key==Value||…||Key==Value

Creating a new line after the ## is allowed.

Example 3: Individual processor usage

Create three Dynamic Dropdown template variables:

First

Tab	Option	Value
General Information	Name	resource_level0
Input Options	Parent Dropdown
Input Options	Dynamic Dropdown Group	resource_levels

Second

Tab	Option	Value
General Information	Name	resource_level1
Input Options	Parent Dropdown	resource_level0
Input Options	Dynamic Dropdown Group	resource_levels

Third

Tab	Option	Value
General Information	Name	resource_level2
Input Options	Parent Dropdown	resource_level1
Input Options	Dynamic Dropdown Group	resource_levels

This example will also add three dropdown select TVs, where you can choose MODX resources. After selecting a resource in the first TV resource_level0, the dropdown select of the second TV resource_level1 will show the childs of this resource. After selecting a resource in the second TV resource_level1, the dropdown select of the third TV resource_level2 will show the childs of this resource. If you select again a resource in the first TV resource_level0 all children of this Dynamic Dropdown TV (resource_level1 and resource_level2) will be resetted.

The above example uses the example processors in /core/components/dynamicdropdowntv/processors/mgr/resource_levels.

Create the individual processors

If you want to create your own processors, choose a group name and create a new folder in /core/components/dynamicdropdowntv/processors/mgr/your-own-group-name. Then create processor files for each dynamic dropdown template variable with names like getoptions.your-dynamic-dropdown-tv-name.php.

All child Dynamic Dropdown TVs will send the name and the selected value of the parent Dynamic Dropdown TV as request parameter pair to the processor.

If no folder with the group name exists in /core/components/dynamicdropdowntv/processors/mgr the default processors are used (as in example 1).

Example 4: Gallery album processor usage:

Create two Dynamic Dropdown template variables

First

Tab	Option	Value
General Information	Name	album0
Input Options	Input Type	Dynamic Dropdown
Input Options	Parent Dropdown
Input Options	Dynamic Dropdown Group	gallery_albums

Second

Tab	Option	Value
General Information	Name	album1
Input Options	Input Type	Dynamic Dropdown
Input Options	Parent Dropdown	album0
Input Options	Dynamic Dropdown Group	gallery_albums

This example will also add two dropdown select TVs, where you can choose MODX gallery albums. After selecting a gallery album in the first TV album0, the dropdown select of the second TV album1 will show the child albums of this album. If you select again a album in the first TV album0 the child of this Dynamic Dropdown TV (album1) will be resetted.

Notes

1. Create all Dynamic Dropdown from up to down!
2. To work correctly, each Dynamic Dropdown TV needs to know all its parents and childs. There is a plugin in onTvFormSave, which collects all parents and children Dynamic Dropdown TVs of the same Dynamic Dropdown group and stores them in input-properties for each TV after saving the TV.
3. You can live search in dropdown select options if you set Enable Type-Ahead to Yes and set Force Selection to List to Yes.