docs » hs.canvas.drawing


An wrapper to replace hs.drawing with hs.canvas.

The intention is for this wrapper to provide all of the same functionality that hs.drawing does without requiring any additional changes to your currently existing code.

Known issues/differences between the wrapper and hs.drawing:

  • images which are "template images" (i.e. some of the images with names in hs.image.systemImageNames and any image retrieved from an hs.menubar object) are displayed with an implicit imageAlpha of 0.5. This closely mimics the NSImageView behavior observed with hs.drawing, but since Apple has not provided full details on how a template image is rendered when it is not used as a template, this is just a guess.

  • image frames from hs.drawing are approximated with additional canvas elements inserted into the canvas; since this module now allows you to create as complex a frame as you like... consider these as "examples".

The wrapper is not enabled by default. See the hs.canvas.drawingWrapper function for details on how to enable or disable this wrapper.

API Overview

  • Functions - API calls offered directly by the extension

API Documentation

Functions

drawingWrapper

Signature hs.canvas.drawingWrapper([state]) -> boolean
Type Function
Description Get or set whether or not hs.drawing is replaced by a wrapper which uses this module.
Parameters
  • `state` - an optional boolean specifying whether or not `hs.drawing` should be replaced with a wrapper using this module.
Returns
  • the current, possibly newly changed, state.
Notes
  • This module was designed to address some of the limitations found with the `hs.drawing` module. It is expected that at some point this module may completely replace the existing `hs.drawing` as it provides more flexibility and will be easier to extend with future additions. This function allows you to choose whether or not you wish to migrate fully to this new drawing model now to facilitate the testing of the wrapper or not.
  • This wrapper was designed to fully mimic the current `hs.drawing` functions and methods -- you should not need to change your existing code in any way once this wrapper is enabled. If you find that you do need to make adjustments or that something in the wrapper does not work as expected, please log an issue at https://github.com/Hammerspoon/hammerspoon/issues.

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