Macro Handler

Macro Handler

Android Automation Platform

Object MethodScanning and Detection

Region.scale(x, y, w?, h?, edges?)

Region.scale(x, y, w, h, edges) maps an area in macro coordinates to the device screen and returns a Region anchored to the given edges (edges: a sum of the LEFT, TOP, RIGHT and BOTTOM constants). On a Region object, region:scale(factor) multiplies its position and size by the factor instead.

Documented for app version 1.0.51Updated:

Detailed Explanation

This section explains when to use the API, how to call it, and which structures it works best with in production flow.

How To Call It

This is a function of the Region factory table itself: call it with a dot (Region.<method>(...)); no Region object is needed. An object method with the same name also exists: region:scale(...).

When To Use It

In detection flow, refresh the screen with Snap.screenRefresh() first, then narrow the search area and confidence using Region and FindParam.

Parameters and Return

Required: x, y. Optional: w, h, edges (omit to pass nil and use the runtime default). Returns a Region object.

Best Combined With

It is typically combined with Snap, Region, Asset, and FindParam; you can feed the result into quickTap(), click(), or a follow-up OCR step.

Example Usage

The snippet below is a starter pattern that can be applied directly in runtime flow.

lua
Try in Editor →
-- A 400 x 120 bar anchored to the right edge of the screen
local bar = Region.scale(600, 40, 400, 120, RIGHT)
local half = Region():scale(0.5)

Copyable Progressive Examples

From foundation to combined usage, each level is provided as a separate code block so you can copy the level you need and adapt it directly.

Foundation

Shows the shortest direct way to call the API.

Foundation
lua
Try in Editor →
-- A 400 x 120 bar anchored to the right edge of the screen
local bar = Region.scale(600, 40, 400, 120, RIGHT)
local half = Region():scale(0.5)

Simple

Wraps the base call with minimal flow control.

Simple
lua
Try in Editor →
local stepOk = true
-- A 400 x 120 bar anchored to the right edge of the screen
local bar = Region.scale(600, 40, 400, 120, RIGHT)
local half = Region():scale(0.5)
if stepOk then
  wait(200)
end

Practical Flow

A practical pattern for real macros with pcall, logging, and guards.

Practical Flow
lua
Try in Editor →
local ok, err = pcall(function()
  -- A 400 x 120 bar anchored to the right edge of the screen
  local bar = Region.scale(600, 40, 400, 120, RIGHT)
  local half = Region():scale(0.5)
end)

if not ok then
  print("API step failed: Region.scale: " .. tostring(err))
  requestStop()
end

Detailed

This level packages the API into a reusable helper with error reporting.

Detailed
lua
Try in Editor →
-- In detection flow, refresh the screen with Snap.screenRefresh() first, then narrow the search area and confidence using Region and FindParam.
local function run_scale_step()
  -- A 400 x 120 bar anchored to the right edge of the screen
  local bar = Region.scale(600, 40, 400, 120, RIGHT)
  local half = Region():scale(0.5)
end

local ok, err = pcall(run_scale_step)
if not ok then
  toast("Step failed")
  print(err)
end

Combined

Combines the API with related structures to form a more realistic workflow.

Combined
lua
Try in Editor →
Snap.screenRefresh()
-- A 400 x 120 bar anchored to the right edge of the screen
local bar = Region.scale(600, 40, 400, 120, RIGHT)
local half = Region():scale(0.5)

local target = Region():find(Asset.image("target"), FindParam.timeout(3000))
if target then
  quickTap(target)
end
toast("Detection step completed")