Stops the screen watcher's fn from getting called until started againĮxtensions/screen/libscreen_watcher. Starts the screen watcher, making it so fn is called each time the screen arrangement changesĮxtensions/screen/libscreen_watcher.m line 137 Plugging in or unplugging a monitor can cause both a screen layout callback and an active screen change callback.Įxtensions/screen/libscreen_watcher.m line 109.This documentation will be updated if this status changes. Because this watcher works by listening for posted messages, should Apple remove this notification, your callback function will no longer receive messages about this change - it won't crash or change behavior in any other way. fn - A function that will be called when application events happen. While this message has been around at least since OS X 10.9, because it is undocumented, we cannot be positive that Apple won't remove it in a future OS X update. Detecting a change in the active display relies on watching for the NSWorkspaceActiveDisplayDidChangeNotification message which is not documented by Apple.An active screen change indicates that the focused or main screen has changed when the user has "Displays have separate spaces" checked in the Mission Control Preferences Panel (the focused display is the display which has the active window and active menubar).nil was chosen instead of false for the argument type when this type of change occurs to more closely match the previous behavior of having no argument passed to the callback function.This function can optionally take one argument, a boolean which will indicate if the change was due to a screen layout change (nil) or because the active screen changed (true). The function to be called when a change in the screen layout or active screen occurs.Hs.(fn) -> watcherĬreates a new screen-watcher that is also called when the active screen changes. It can also be caused by a change in the Dock size or presence.Įxtensions/screen/libscreen_watcher.m line 75 A screen layout change usually involves a change that is made from the Displays Preferences Panel or when a monitor is attached or removed.The function to be called when a change in the screen layout occurs.Methods - API calls which can only be made on an object returned by a constructorĪPI Documentation Constructors new Signature.Constructors - API calls which return an object, typically one that offers API methods.This module is based primarily on code from the previous incarnation of Mjolnir by Steven Degutis. if you have FileVault enabled and the machine resumes out of hibernation - the screen events will be happening before the drive is unlocked and will not be reported to Hammerspoon) Note that screen events which happen while your Mac is suspended, may not trigger the watcher in various circumstances (e.g. This could be the addition or removal of a monitor, a screen resolution change, movement of a monitor in the Display preferences pane, etc. Chuck explains exactly how that works in this podcast and goes deeper as part of the Dev Influencers Accelerator.Hammerspoon docs: hs.screen.watcher docs » hs.screen.watcher A podcast is a great way to do all three. Being known for being valuable in important ways allows you to leverage the skills you have to build better relationships and create opportunities to get what you need to get the outcomes you want by giving people what they want. Having good relationships is key to having good outcomes. Often other people will be able to help you find the opportunities or will be the ones to make the decisions that impact your ability to get the outcome you want. However, don't neglect your people skills and your organizational skills as well since you're often paid for how you work with people and enhance their work and how you put your work together in the most efficient ways. The most obvious type of skills you'll need is technical skills. Whether that's something simple like a raise or something more complex like going freelance, you can achieve it by working on 3 main areas.įirst, building skills. Chuck dives into the 3 essentials for getting the next successful outcome you want in your career.
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