Does anyone know of a library (preferably java) that can give me neighboring keys given a key input for US_ENGLISH standard keyboard?
E.g. if I input the character 'd', I should get the following characters returned: [w,e,r,s,f,x,c,v].
Alternatively a grid manipulation api would work too (so that I can instantiate a grid with a qwerty keyboard layout and use it to find my neighbors).
Note 1: I am using the words 'character' and 'key' synonymously to refer to characters.
Note 2: I know I can hard-code a method to map the 50-or-so primary keys to their neighbors. I am looking for a better solution.
Thank You.
I agree with BlueNovember but in case you want a more "mathematical" solution check this. First you create a grid of characters and then you return all of them that has a distance smaller than 2 from the key passed... Kinda useless but it's a nice exercise :)
public class Test {
static String chars = "qwertyuiopasdfghjkl;zxcvbnm,.";
public static void main(String[] args) {
System.out.println(getNeighboringKeys('f'));
System.out.println(getNeighboringKeys('u'));
System.out.println(getNeighboringKeys('m'));
System.out.println(getNeighboringKeys('q'));
}
public static String getNeighboringKeys(char key) {
StringBuffer result = new StringBuffer();
for (char c : chars.toCharArray()) {
if (c!=key && distance(c,key)<2) {
result.append(c);
}
}
return result.toString();
}
public static double distance(char c1, char c2) {
return Math.sqrt(Math.pow(colOf(c2)-colOf(c1),2)+Math.pow(rowOf(c2)-rowOf(c1),2));
}
public static int rowOf(char c) {
return chars.indexOf(c) / 10;
}
public static int colOf(char c) {
return chars.indexOf(c) % 10;
}
}
I gave up on this and just let the user choose what keys are suitably adjacent. In this project an enum Key
relates each command to a keyCode
, and this dialog lets the user change the mapping. The result is saved in Preferences
.
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