keyevent

问题 I'm trying to use the Robot class in Java and type some text. Unfortunately I'm having problems finding the key codes of the square brackets, this symbol | and this symbol `. I can't find them in the KeyEvent constants. I want to use them, because the text i'm typing is in cyrillic and these symbols represent characters in the alphabet. Thanks in advance. 回答1: It's in the JavaDoc for KeyEvent KeyEvent.VK_OPEN_BRACKET and KeyEvent.VK_CLOSE_BRACKET Edit From the KeyEvent JavaDoc This low-level

问题 I am stuck in implementing the following: User starts typing in a textbox. The javascript on page captures the first character typed, validates that it is an english alphabet (a-z,A-Z) and converts it to lowercase (if necessary). Make an XMLHttp request based on the input (i.e. if first input character is a, get a.xml, if b get b.xml and so on). I know how to do the last part (make the xmlhttp request) but am kind of stuck on how to capture the first character and validate it (in a way that

问题 im making android voice assistant app...that run service in background for recognizing the voice command . i want to take picture in default system camera app when the user say's the word "selfie".i already know how to work with voice command but the problem is i cant make the camera app take picture ... i tried some way but wont helped 1st i tried to simulate android camera key event Intent intent1 = new Intent("android.intent.action.CAMERA_BUTTON"); intent1.putExtra("android.intent.extra

问题 Firstly, I'm a complete beginner, so I do not have any experience, I have however searched all the possible places these last 2 days for a resolve, and could not find it. I'm using this on a Raspberry PI 3 with Raspbian. I'm trying to build a simple code in Python 3.6 that will do the following: When pressing a keyboard key: 1.it should print 'press' if the key was pressed, without repeating. (if the key is being held down, it should print 'press' only once and stop). 2.it should print

问题 I am trying to capture key press events (page up and down) but there are no key events received at all. Here is the relevant code: Constructor: private MainLayout() { imageView = new ImageView(); root = new StackPane(); root.getChildren().add(imageView); root.setFocusTraversable(true); //no effect //root.requestFocus(); //also no effect registerEvents(); } Both lines regarding the focus don't have an effect. The stack pane is directly added to scene. There are no other nodes than Scene-

问题 I am new to GUI programming. While practicing KeyEvent handling on Java Swing JTextarea I face one problem. The listener interface is implemented by text area itself. When I pressed VK_ENTER key in text area I get text from text area then I displayed that text into JTextPane . After that I set text as empty string on text area. Here I used keyPressed key event - it is creating one new line in text area but already I set text area row as 0 (zero). Actually I want one row in text area I don't

问题 I'm working on a remoting app.(mouse - keyboard) I just showing fastly my issue... It's working for 'A' or some basic characters. case "a": robot.keyPress(KeyEvent.VK_A); But I did'nt make '@' character. My way is look like this. case "@": robot.keyPress(KeyEvent.VK_ALT_GRAPH); robot.keyPress(KeyEvent.VK_Q); robot.keyRelease(KeyEvent.VK_ALT_GRAPH); I see the exception when I use VK_ALT_GRAPH; Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Invalid key code at sun

问题 I am using a NotifyIcon from Win Forms to make a systray icon for my WPF C# application. I have a bug where if the user right clicks the icon for the context menu, they can press Alt-F4 and the icon will disappear from the tray, but the Main WPF application is still running. This is especially a problem when they have "minimized to systray" and the only control of the application is now gone. Anyone know how to handle this specificially on the systray? I've looked at the NotifyIcon

问题 In one of my Custom view, inheriting from a View group, I was getting Key_Down and Key_Up events for a Tab key in dispatchKeyEvent method. A latest update on Google Keyboard upgraded it from 4.0.* to 5.0.*. Post this update, I am not getting Key_Down in dispatchKeyEvent in the ViewGroup. I have checked that I am getting both Key_Down and Key_Up events in dispatchKeyEventPreIme in ViewGroup. Also, I am not handling Key_Down in OnKeyPreIme in my Custom View. I am not able to figure out, who is

问题 I have a simple form by which I take input: 12 Buttons, 1 Textbox (disabled & read-only) this is what I do to handle input Login_KeyDown() is common method I call for all the KeyDown of every UI component & the form itself.. private void Login_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Escape) { Application.Exit(); } else if (e.KeyCode == Keys.NumPad9 || e.KeyCode == Keys.D9) { button3.BackgroundImage = Properties.Resources.button_hover; button3.ForeColor = Color.White;