keyboard-events

来源： https://stackoverflow.com/questions/53928432/double-tap-button-issue-when-keyboard-opens-react-native

来源： https://stackoverflow.com/questions/55107998/swift-how-to-scroll-the-collectionviews-contents-when-the-keyboard-is-raised

问题 In my SDL 2.0 based application, I would like to handle both Control + and Control = . I understand that I could handle the SDL_KEYDOWN event and look for the SDLK_EQUALS keycode in combination with KEYMODE_CTRL . And even check for KEYMOD_SHIFT' to distinguish between + and =`. However, this is not portable and breaks on keyboards where those symbols are mapped to different keys. Another thing I have tried is to enable SDL_StartTextInput() and then listen to SDL_TEXTINPUT events. However

问题 I'm using PyQt5. When I write a keyPressEvent handler, I would like to be able to print, for debugging purposes, a human-readable description of what keys were pressed. I want to be able to print such a thing no matter what, regardless of how many keys were pressed in the event, or whether they were modifiers or "regular" keys. I have seen this previous question in which the accepted answer (using C++) suggests creating a QKeySequence and using its .toString method. I can do this like this:

问题 so I'm trying to build a short script in Python. What I want to do is that if the mouse is clicked, the mouse will reset to some arbitrary position (right now the middle of the screen). I'd like this to run in the background, so it could work in in the OS (most likely Chrome, or some web browser). I'd also like it so that a user could hold down a certain button (say ctrl) and they could click away and not have the position reset. This way they could close the script without frustration. I'm

问题 I'm trying to create arrow based keyboard controls for a game I'm working on. Of course I'm trying to stay up to date with React so I wanted to create a function component and use hooks. I've created a JSFiddle for my buggy component. It's almost working as expected, except when I press a lot of the arrow keys at the same time. Then it seems like some keyup events aren't triggered. It could also be that the 'state' is not updated properly. Which I do like this: const ALLOWED_KEYS = ['ArrowUp'

问题 I'm trying to create arrow based keyboard controls for a game I'm working on. Of course I'm trying to stay up to date with React so I wanted to create a function component and use hooks. I've created a JSFiddle for my buggy component. It's almost working as expected, except when I press a lot of the arrow keys at the same time. Then it seems like some keyup events aren't triggered. It could also be that the 'state' is not updated properly. Which I do like this: const ALLOWED_KEYS = ['ArrowUp'

问题 I'm trying to create arrow based keyboard controls for a game I'm working on. Of course I'm trying to stay up to date with React so I wanted to create a function component and use hooks. I've created a JSFiddle for my buggy component. It's almost working as expected, except when I press a lot of the arrow keys at the same time. Then it seems like some keyup events aren't triggered. It could also be that the 'state' is not updated properly. Which I do like this: const ALLOWED_KEYS = ['ArrowUp'

问题 Is there any way to check if keyboard is open or not in Xamarin Forms? Are there any events getting fired when the keyboard opens or closes? If so, where can I find an example of it? 回答1: I don't believe that there's a Xamarin.Forms way of doing it. Anyway, for the different platforms (at least Android and iOS) there is a way to achieve what you want. Android Under android there is InputMethodManager class. You can obtain it from your activity var inputMethodManager = (InputMethodManager)this

问题 Is there any way to check if keyboard is open or not in Xamarin Forms? Are there any events getting fired when the keyboard opens or closes? If so, where can I find an example of it? 回答1: I don't believe that there's a Xamarin.Forms way of doing it. Anyway, for the different platforms (at least Android and iOS) there is a way to achieve what you want. Android Under android there is InputMethodManager class. You can obtain it from your activity var inputMethodManager = (InputMethodManager)this