ViewModel

A ViewModel provides access to named properties used for data binding between your application and a Rive file.

Fields

name

The name of the view model.

(Coming soon)

Methods

getNumber

getNumber(name: string) -> Property<number>?

Returns the numeric property with the given name, or nil if not found.

local vmi = context:viewModel()
if vmi then
  local score = vmi:getNumber('score')
  if score then
    print(score.value)
  end
end

getTrigger

getTrigger(name: string) -> PropertyTrigger?

Looks up a trigger property by name. Returns a PropertyTrigger.

local vmi = context:viewModel()
if vmi then
  local myTrigger = vmi:getTrigger('myTrigger')
  if myTrigger then
    myTrigger:fire()
  end
end

getString

getString(name: string) -> Property<string>?

Looks up a string property by name. Returns a DataValueString.

local vmi = context:viewModel()
if vmi then
  local heading = vmi:getString('heading')
  if heading then
    print(heading.value)
  end
end

getBoolean

getBoolean(name: string) -> Property<boolean>?

Looks up a boolean property by name. Returns a DataValueBoolean.

local vmi = context:viewModel()
if vmi then
  local darkMode = vmi:getBoolean('darkMode')
  if darkMode then
    print(darkMode.value)
  end
end

getColor

getColor(name: string) -> Property<Color>?

Looks up a color property by name. Returns a DataValueColor.

local vmi = context:viewModel()
if vmi then
  local primaryColor = vmi:getColor('primaryColor')
  if primaryColor then
    primaryColor.value = Color.rgba(255, 0, 0, 155)
  end
end

getList

getList(name: string) -> PropertyList?

Looks up a List property by name. Returns a PropertyList.

local vmi = context:viewModel()
if vmi then
  local enemies = vmi:getList('enemies')
  if enemies then
    enemies:pop()
  end
end

getViewModel

getViewModel(name: string) -> PropertyViewModel?

Looks up a view model property by name. Returns a PropertyViewModel.

local vmi = context:viewModel()
if vmi then
    local nestedVM = vmi:getViewModel('MyVM')
end

getEnum

getEnum(name: string) -> PropertyEnum?

Looks up an enum by name. Returns a PropertyEnum.

local vmi = context:viewModel()
if vmi then
    local textAlignment = vmi:getEnum('textAlignment')
end

instance

instance(instanceName: string?) -> ViewModel

Creates a new instance of the ViewModel. Pass instanceName to specify an existing instance from the file to use as template

function init(self: VMNameNode, context: Context): boolean
  local vm = context:viewModel()
  if vm then
    local newInstance = vm:instance()
    local age = newInstance:getNumber('age')
    if age then
      age.value = 99
    end
  end

  return true
end

getIndex

getIndex() -> number

Returns the index. Returns -1 if view model does not have an index available.