keyboard-events

问题 I am writing a Key board emulator program in Linux, As a start I was able to render key strokes into X11 window but this is not working in virtual terminals and try out a different way. I referred to http://thiemonge.org/getting-started-with-uinput and tried with uinput kernel module. According to the tutorial key strokes can be injected as a uinput event and I wrote below code accordingly. #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h>

问题 I'm working with WPF KeyDown event (KeyEventArgs from Windows.Input). I need to recognize when user pressed F1 alone and Ctrl+F1. private void Window_KeyDown(object sender, KeyEventArgs e) { if (e.Key==Key.F1 && Keyboard.IsKeyDown(Key.LeftCtrl)) { MessageBox.Show("ctrlF1"); } if (e.Key == Key.F1 && !Keyboard.IsKeyDown(Key.LeftCtrl)) { MessageBox.Show("F1"); } } My problem is that when I press Ctrl+F1 plain F1 messagebox would fire too. I tried to add e.Handled to Ctrl+F1 case, but it doesn't

问题 I'm working with WPF KeyDown event (KeyEventArgs from Windows.Input). I need to recognize when user pressed F1 alone and Ctrl+F1. private void Window_KeyDown(object sender, KeyEventArgs e) { if (e.Key==Key.F1 && Keyboard.IsKeyDown(Key.LeftCtrl)) { MessageBox.Show("ctrlF1"); } if (e.Key == Key.F1 && !Keyboard.IsKeyDown(Key.LeftCtrl)) { MessageBox.Show("F1"); } } My problem is that when I press Ctrl+F1 plain F1 messagebox would fire too. I tried to add e.Handled to Ctrl+F1 case, but it doesn't

问题 Anybody have any insight into controlling turtle graphics in python 2.7 with keyboard commands? I have done extensive research on this website and others and feel like I am doing the right thing but it just doesn't want to work for me. Below is what I have so far, can anyone tell me where I am going wrong???? from turtle import * turtle.setup(500, 500) wn = turtle.Screen() wn.title("Turtle Keys") move = turtle.Turtle() showturtle() def k1(): move.forward(45) def k2(): move.left(45) def k3():

问题 What is the best way to listen for keyboard input in a Java Applet? I have an applet which opens a JFrame and I am using a KeyListener to listen for keyboard input. This works fine in my development environment (eclipse), but when I run the applet through a browser (I have tried Firefox and IE) it does not respond to keyboard events. However, if I run the applet and then minimize and maximize the frame, it works. I have tried setting focus to the JFrame in many different ways and also

问题 What is the best way to listen for keyboard input in a Java Applet? I have an applet which opens a JFrame and I am using a KeyListener to listen for keyboard input. This works fine in my development environment (eclipse), but when I run the applet through a browser (I have tried Firefox and IE) it does not respond to keyboard events. However, if I run the applet and then minimize and maximize the frame, it works. I have tried setting focus to the JFrame in many different ways and also

问题 What is the best way to listen for keyboard input in a Java Applet? I have an applet which opens a JFrame and I am using a KeyListener to listen for keyboard input. This works fine in my development environment (eclipse), but when I run the applet through a browser (I have tried Firefox and IE) it does not respond to keyboard events. However, if I run the applet and then minimize and maximize the frame, it works. I have tried setting focus to the JFrame in many different ways and also

问题 What is the best way to listen for keyboard input in a Java Applet? I have an applet which opens a JFrame and I am using a KeyListener to listen for keyboard input. This works fine in my development environment (eclipse), but when I run the applet through a browser (I have tried Firefox and IE) it does not respond to keyboard events. However, if I run the applet and then minimize and maximize the frame, it works. I have tried setting focus to the JFrame in many different ways and also

问题 The problem is that for both underscore and minus the keyvalue is 189, and the keycode is Keys.OemMinus. So I am unable to check whether pressed key is underscore or minus. Please Help. private void Some_KeyDown(object sender, KeyEventArgs e) { if(Pressed key is minus/dash) { MessageBox.Show("minus"); } if(pressed key is underscore) { MessageBox.Show("underscore"); } } 回答1: If this is a WinForms project, use the KeyPress event instead of the KeyDown event: private void textBox1_KeyPress

问题 I implemented a <textarea> in Elm such that tabs indent and unindent instead of change focus to another HTML element. Works great except that unindenting sometimes causes the selection to disappear! If I'm selecting the 5th character to the 12th character, I press shift - tab , then it removes 2 tab characters, but it also makes the selection change to a cursor at position 10. The selection range should remain the same.. I have an SSCCE at Ellie: https://ellie-app.com/3x2qQdLqpHga1/2 Here are