The Form Application¶
A very common use case for building
Application() UI elements is to edit an existing data object. The editing
workflow has many common features - you have a form of input fields which are modified and then saved, at which point
the underlying data object is saved and further downstream updates may also occur.
In order to simplify this workflow, the
FormApplication() class provides a layer of abstraction which extends
Application() and adds some additional methods and workflows which are specifically ideal for working
with forms and saving new data.
An abstract pattern for defining an Application responsible for updating some object using an HTML form
A few critical assumptions: 1) This application is used to only edit one object at a time 2) The template used contains one (and only one) HTML <form> as it’s outer-most element 3) This abstract layer has no knowledge of what is being updated, so the implementation must define _updateObject
- object (*) – Some object or entity which is the target to be updated.
- options (Object) – Additional options which modify the rendering of the sheet.
- options.editable (Boolean) – Is the form editable, or should its fields be disabled?
Activate the default set of listeners for the Entity sheet These listeners handle basic stuff like form submission or updating images
- html (JQuery) – The rendered template ready to have listeners attached
Extend the logic applied when the application is closed to destroy any remaining MCE instances This function returns a Promise which resolves once the window closing animation concludes
Returns: Promise –
Assign the default options which are supported by the entity edit sheet
Keep track of any mce editors which may be active as part of this form The values of this Array are inner-objects with references to the MCE editor and other metadata
Keep track of any FilePicker instances which are associated with this form The values of this Array are inner-objects with references to the FilePicker instances and other metadata
A convenience reference to the form HTMLElement
Provide data to the form
Returns: Object – The data provided to the template when rendering the form
Is the Form Application currently editable?
The object target which we are using this form to modify