keyboard

问题 How can I detect keyboard event in C language without using third party libraries? Should I use signal handling? 回答1: There's not a standard way, but these should get you started. Windows: getch(); Unix: Use this code from W. Richard Stevens' Unix Programming book to set your terminal in raw mode, and then use read(). static struct termios save_termios; static int term_saved; int tty_raw(int fd) { /* RAW! mode */ struct termios buf; if (tcgetattr(fd, &save_termios) < 0) /* get the original

问题 Im using foloowing code to track key events oEvent=window.event || oEvent; iKeyCode=oEvent.keyCode || oEvent.which;alert(iKeyCode); its giving me alerts in firefox but not in IE and chrome. Its giving me all the other keyborad characters but not esc key and arrow keys. How can i detect esc key and arrow keys in chrome and IE using javascript?? 回答1: You don't really need JQuery, though it does make your code shorter. You will have to use the keyDown event, keyPress will not work in old

问题 There are several tricks for displaying different keyboards on mobile devices for HTML 5 inputs (i.e. <input> tags). For example, some are documented on Apple's website, Configuring the Keyboard for Web Views. These are great for usability, but when it comes to an input for for international postal codes (mostly numeric, but letters allowed), we're left with some poor options. Most people recommend using the pattern="\d*" trick to show the numeric keyboard, but that doesn't allow for letter

问题 The height in portrait and the height in landscape measured in points. 回答1: I used the following approach for determining the frame of the keyboard in iOS 7.1. In the init method of my view controller, I registered for the UIKeyboardDidShowNotification : NSNotificationCenter *center = [NSNotificationCenter defaultCenter]; [center addObserver:self selector:@selector(keyboardOnScreen:) name:UIKeyboardDidShowNotification object:nil]; Then, I used the following code in keyboardOnScreen: to gain

问题 Does pygame.display.set_mode have to be used to utilize the keyboard keys? Once I added it to my code everything worked - but I do not want to open a pygame window. Does anyone know how to utilize the keyboard without having to call pygame.display.set_mode ? 回答1: You have to use pygame.display.set_mode to create a window, since it's this very window that recieves the keyboard events from your OS' window manager. You can run pygame without a window (by setting the environment variable SDL

问题 I'm trying to send a WM_KEYDOWN/WM_KEYUP pair to an application which normally does NOT respond to the use of the KEYBDINPUT struct. I will need to send the escape key, as well as alphanumeric characters. As the MSDN only gives vague information on using the hardware struct, I could only assume that the uMsg field is meant to hold WM_KEYDOWN/WM_KEYUP messages, and the the next two fields are for the LOWORD and HIWORD of lParam (composed of several bits which define the scan code, whether or

问题 I'm making a questions and answers game in a language other than English. The questions will be in Nepali (similar to indian) and user needs to type answers in the same script. When I run the app the English keyboard gets displayed and I've to switch to the Nepali keyboard before typing. But is there anyway that when user taps into the type panel, it automatically displays a Nepali Keyboard instead of English (as English Keyboard is the primary keyboard in every phone)? Upon searching on the

问题 I'm making a questions and answers game in a language other than English. The questions will be in Nepali (similar to indian) and user needs to type answers in the same script. When I run the app the English keyboard gets displayed and I've to switch to the Nepali keyboard before typing. But is there anyway that when user taps into the type panel, it automatically displays a Nepali Keyboard instead of English (as English Keyboard is the primary keyboard in every phone)? Upon searching on the

问题 Is it possible to disable the keyboard controls for a Combobox in ZK? That is, when a user enters some text into a Combobox, by default they can use the arrow keys to move up and down the list. I would like to disable this functionally as it doesn't work well with the user experience we are designing. I see nothing in the documentation explicitly. 回答1: You can override _doKeyDown js function, e.g., <zk xmlns:w="client"> <combobox> <attribute w:name="_doKeyDown"><![CDATA[ function (evt) { var

问题 I'm trying to check consecutive characters in a string to see if they are adjacent on the keyboard. It's part of a program that I am writing to assess password strength. I have this code that initializes the keyboard as an array: KeyboardRow1 = ["`", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "=", ""] KeyboardRow2 = ["", "q", "w", "e", "r", "t", "y", "u", "i", "o", "p", "[", "]", ""] KeyboardRow3 = ["", "a", "s", "d", "f", "g", "h", "j", "k", "l", ";", "", "", ""] KeyboardRow4 = [