The object can handle the event in any way it sees fit. Most responder objects (such as custom views) handle key events by overriding the keyDown: method declared by NSResponder. See Overriding the keyDown: Method for more information.Īs with key event messages, a keyboard action message is passed up the responder chain if the first responder does not handle it. At this point, the key event could represent any one of the following things:Ī keyboard action, which is a key or key combination bound to an action-message selector in a key bindings dictionary (see Key Bindings).Īn application-specific command or action (one not using the key bindings dictionary)Ī character or characters to insert into text The responder object determines what the key event represents and handles it appropriately. If the event is neither of these, it dispatches it to the NSWindow object representing the key window, which in turn dispatches the event to the first responder in a keyDown: message. The global application object ( NSApp) first looks for key equivalents and then keyboard interface control commands and handles them specially (see The Path of Key Events for details). The delivery path of a key event varies according to whether the event represents a character, a key equivalent, a keyboard action, or a keyboard interface control command. If the first responder does not handle the event, it passes the event up the responder chain (see The Responder Chain). Most key events-that is, those representing characters to be inserted as text-are dispatched by the NSWindow object associated with the key window to the first responder. For example, if the user presses the Option key by itself, your responder object can detect this in its implementation of flagsChanged. Issue occurs in MacOs 10.14 - 10.14.3.Ĭould you provide a little more information on what you're experiencing (perhaps a step by step, as I can't see how to reproduce what you're trying to explain)ġ: Create a new Cocoa project (I'm using Swift here, but shouldn't make a difference).Ģ: Replace the ViewController.The flagsChanged: method can be useful for detecting the pressing of modifier keys without any other key being pressed simultaneously. I've made sure to disable all power pack workflows. Turning off Alfred prevents this from happening. If the above conditions are met, the key code is changed to 8, which is C on QWERTZ-keyboards. The modifier flags ALT and CMD are active The key with key code 42 is pressed (# on QWERTZ-keyboards) While the debug output of the global monitor always yields correct key codes, the local monitor does not under the following circumstances: The two are used for completely different purposes and only one of them is active at a time. headInsertEventTap option to observe events of type. I'm using a local event monitor and a global monitor with the. It unfortunately breaks my application by altering the key code of NSEvent/CGEvents of type keyDown and keyUp observed by a local event monitor. While I was working on my own little private project, I've noticed a very strange behaviour when Alfred 3.8 is running. As a developer, I'm using Alfred myself a lot.
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