From Java Swing 2nd Edition: All text components share a set of default Actions. Each of these Actions are instances of TextAction by default. JTextComponent provides a private static EditorKit which consists of a set of four pre-built TextActions shared by all text components through the use of a default Keymap instance. JTextComponent maintains a … Read more
KeyListener is a much lower level API which requires the component that it is registered to be focused AND have keyboard focus. This can cause issues when you have other components within your game that may grab keyboard focus, for example. KeyListener is generally more difficult to maintain and extend or change, as typically, all … Read more
Swapping CTRL and CAPS LOCK Go into System Preferences Enter the Keyboard & Mouse preference pane In the Keyboard tab, click Modifier Keys… Swap the actions for Caps Lock and Control. Using ALT/OPTION as META In the menu bar, click Terminal Click Preferences… Under the Settings tab, go to the Keyboard tab Check the box … Read more
Emacs has a complex mechanism to handle the vicissitudes of function key and modifier encodings on various terminal types. It doesn’t work out of the box in all cases. The following settings should work on your terminal: (define-key input-decode-map “\e\eOA” [(meta up)]) (define-key input-decode-map “\e\eOB” [(meta down)]) (global-set-key [(meta up)] ‘transpose-line-up) (global-set-key [(meta down)] ‘transpose-line-down) … Read more
I’ll bet that you’re requesting focus before the JPanel has been rendered (before the top level window has either had pack() or setVisible(true) called), and if so, this won’t work. Focus request will only be possibly granted after components have been rendered. Have you checked what your call to requestFocus() has returned? It must return … Read more
Go to this folder which contains dark side of the force: Xcode 4.2 or prior: /Developer/Library/PrivateFrameworks/IDEKit.framework/Resources Xcode 4.3 or later: /Applications/Xcode.app/Contents/Frameworks/IDEKit.framework/Resources. Open IDETextKeyBindingSet.plist. Add a new dictionary and a new command item as the screenshot below (name them what you want): That’s: selectLine:, copy:, moveToEndOfLine:, insertNewline:, paste:, deleteBackward: Restart Xcode and go to Preferences – … Read more
Generally speaking, where you have a limited set of key inputs, key bindings are a better choice. KeyListener suffers from issues related to focusability and with other controls in the GUI, focus will constantly be moving away from the component (with the KeyListener) all the time. A simple solution would be to use the Actions … Read more
keyPressed – when the key goes down keyReleased – when the key comes up keyTyped – when the unicode character represented by this key is sent by the keyboard to system input. I personally would use keyReleased for this. It will fire only when they lift their finger up. Note that keyTyped will only work … Read more
I would use @HostListener decorator within your component: import { HostListener } from ‘@angular/core’; @Component({ … }) export class AppComponent { @HostListener(‘document:keypress’, [‘$event’]) handleKeyboardEvent(event: KeyboardEvent) { this.key = event.key; } } There are also other options like: host property within @Component decorator Angular recommends using @HostListener decorator over host property https://angular.io/guide/styleguide#style-06-03 @Component({ … host: { … Read more
Try running the following program. You just have to be sure your window has the focus when you hit Return–to ensure that it does, first click the button a couple of times until you see some output, then without clicking anywhere else hit Return. import tkinter as tk root = tk.Tk() root.geometry(“300×200”) def func(event): print(“You … Read more