arrow-keys | 易学教程

Simulate left and right arrow key event with javascript

阅读更多关于 Simulate left and right arrow key event with javascript

问题 I'm using the slide.html5rocks.com framework and I'm trying to use to img tags inside of a tag links and I can't get the JavaScript onclick to simulate the left and right key events to change slides 回答1: You're looking for something that will dispatch an event. Here's something that should work: function fireKey(el) { //Set key to corresponding code. This one is set to the left arrow key. var key = 37; if(document.createEventObject) { var eventObj = document.createEventObject(); eventObj

getch and arrow codes

阅读更多关于 getch and arrow codes

I'm writing a programm that's using getch() to scan for arrow keys. My code so far is: switch(getch()) { case 65: // key up break; case 66: // key down break; case 67: // key right break; case 68: // key left break; } Problem is that when I press 'A' , 'B' , 'C' or 'D' the code will also executed, because 65 is the decimal code for 'A' , etc... Is there a way to check for an arrow key without call others? Thanks! qwertz By pressing one arrow key getch will push three values into the buffer: '\033' '[' 'A' , 'B' , 'C' or 'D' So the code will be something like this: if (getch() == '\033') { //

Disable arrow key scrolling in users browser

阅读更多关于 Disable arrow key scrolling in users browser

问题 I\'m making a game using canvas, and javascript. When the page is longer than the screen (comments, etc.) pressing the down arrow scrolls the page down, and makes the game impossible to play. What can I do to prevent the window from scrolling when the player just wants to move down? I guess with Java games, and such, this is not a problem, as long as the user clicks on the game. I tried the solution from: How to disable page scrolling in FF with arrow keys ,but I couldn\'t get it to work. 回答1

C++ Detect when user presses arrow key

阅读更多关于 C++ Detect when user presses arrow key

问题 I have been having a problem with detecting arrow key presses in my C++ console application. I have tried everything I have found, both here and on other tutorial sites, but all of them give me the same thing whenever I press the arrow: Process returned 0 <0x0> execution time : 2.249 s Press any key to continue. Here are all the methods of detecting the key press that I have tried, all ending up the same way. These are the only two left in my code, the others I attempted I deleted instead of

getch and arrow codes

阅读更多关于 getch and arrow codes

问题 I\'m writing a programm that\'s using getch() to scan for arrow keys. My code so far is: switch(getch()) { case 65: // key up break; case 66: // key down break; case 67: // key right break; case 68: // key left break; } Problem is that when I press \'A\' , \'B\' , \'C\' or \'D\' the code will also executed, because 65 is the decimal code for \'A\' , etc... Is there a way to check for an arrow key without call others? Thanks! 回答1: By pressing one arrow key getch will push three values into the