keyboard-events

问题 I am creating a macro program to record and play back mouse and keyboard input. Recording works fine, as does mouse playback, but I am having trouble in playing back the keyboard input - specifically pressing and holding a key for several seconds before releasing. This is not equivalent to repetitively pressing the key. This is what I have tried: Technique 1: Me.KeyDown Private Sub keyboard_pressed() Handles Me.KeyDown Dim keypress = e.KeyData MsgBox(keypress) End Sub Only works when window

问题 I want to make a key combination with Keys SHIFT + D hence when both keys are pressed, purpose X starts. But my Key D is also being used to start purpose Y. How do I make sure when I'm pressing the key SHIFT + D , purpose X and only Purpose X is started and not Purpose Y. FYI --- Shift will be pressed before D. I tried solving this problem myself, here is my code... private void Form1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == moveRight && isJumping != true && isHovering !=

问题 There are events called 'onkeydown' and 'onkeyup' in Javascript. Can anyone please suggest the python equivalent of it? 回答1: Without any external library, python can't provide GUI features, such as events handling. Listening to an event such onkeydown or onkeyup is thus impossible with the python sdl. If you really want to react to these events, you must use an external library providing event-driven operations, such as the Qt binding PyQt, the TKinter module, or other libraries. 来源： https:/

问题 Angular4 docs shows ( Key event filtering (with key.enter) ) how to catch keyboard keystrokes events easier - (keyup.enter)="foo()" or keyup.w or keyup.space etc. What I need is to fire event only if letters being pressed. One way I can think of is: <input id="textFilter" (keyup)=“foo($event)”> foo(e){ var allowedKeys = [‘KeyQ’, ‘KeyW’, ‘KeyE’, and the rest of the alphabet...] if (allowedKeys.indexOf(e.code) != -1 ) { return true; } } But I would expect such pseudo-events already build-in in

问题 I am using RN 0.55.4 + Expo I tried to use KeyboardAvoidingView to my form but it doesnt change anything with or without KeyboardAvoidingView , its still blocking my form. I am using tcomb-form This is my current code return ( <View style={styles.container}> <KeyboardAvoidingView> <ScrollView> <View> <Header/> <View style={styles.inputs}> <LoginForm formType={formType} form={this.props.auth.form} value={this.state.value} onChange={self.onChange.bind(self)}/> {passwordCheckbox} </View>

问题 How to disable the up arrow key when a button is focused and enable it when the button is not focused in angular2? For example: In html: <button type="button" (focus)="disableUpArrowKey()"> In script: disableUpArrowKey(){ //?? } 回答1: Bind on keydown and call preventDefault of event. html: <button (keydown)="onKeydown($event)">Button</button> ts: ... onKeydown(event: KeyboardEvent) { if (event.key === 'ArrowUp') { event.preventDefault() } } ... stackblitz : https://stackblitz.com/edit/angular

问题 I'm trying to simulate key-down and key-up for the OPT key on macOS. CGEventSourceRef source = CGEventSourceCreate( kCGEventSourceStateHIDSystemState ); CGEventRef ev = CGEventCreateKeyboardEvent( source, keycode, is_down ); // CGEventSetFlags( ev, NSEventModifierFlagOption ); CGEventPost( kCGHIDEventTap, ev ); CFRelease( ev ); ... with is_down = true then false . It works in most situations. However, It does not match the native behaviour if I perform the following test: I hover over a

问题 Recently I heard about new ways of working with various keyboards, using KeyboardEvent.code and KeyboardEvent.key . It's a great feature but is there a way of getting event.key when you know event.code ? Let's say that the user printed 'w' letter and triggered an event with event.code = 'KeyW' that you saved somewhere. Then later you need to find out the event.key value that the user would print if he triggered that event again (with event.code = 'KeyW' ). Maybe I should programatically

问题 Working on an Angular / TypeScript app, where we have a custom basic text editor. Trying to appropriately handle when a user has a highlighted selection and then hits a key, intending to replace the selection. To handle this, we need to properly remove the "hidden" components that they have selected before inserting their intended content. My initial thought was to: Capture KeyDown event Check if there is a highlighted range selected If yes, delete all of the selected content Re-dispatch the

问题 Since Spotify changed to their latest version the old Play/Pause through ControlSend, ahk_parent, {space}, ahk_class SpotifyMainWindow stopped working. It seems Spotify can now capture the Media keys and as suggested by other members the following works: ^Space::Media_Play_Pause HOWEVER mapping to the Pause key doesn't work. Pause::Media_Play_Pause Any idea why??? FYI here is the scan of the keys: Working (^Space): VK SC Type Up/Dn Elapsed Key Window ------------------------------------------