J'ai eu la chance de trouver string.fromcharcode () . Cela m'a aidé de manière significative. Cependant, j'ai remarqué que cela ne prend pas en compte le modificateur de changement de vitesse. Je connais la propriété event.Shiftwey et utilisez-le, mais maintenant, je dois obtenir la valeur de la clé (par exemple: "A" ou "A") qui prend en compte le modificateur de touches de décalage. Au début, j'ai utilisé string.tolowercase () .. mais j'ai négligé de penser à des clés de numéro, de donner un exemple: "5" (sans quart de vitesse) et "%" (avec le quart de travail). J'ai besoin de différencier les deux dans mon programme. Quel est un moyen facile d'obtenir la clé de charcuterie?
3 Réponses :
Cette technique de force brute n'est pas la plus jolie, mais elle semble fonctionner. Je suis à la recherche de la même fonctionnalité.
function mapKeyPressToActualCharacter(isShiftKey, characterCode) {
if ( characterCode === 27 || characterCode === 8 || characterCode === 9 || characterCode === 20 || characterCode === 16 || characterCode === 17 || characterCode === 91 || characterCode === 13 || characterCode === 92 || characterCode === 18 ) {
return false;
}
if (typeof isShiftKey != "boolean" || typeof characterCode != "number") {
return false;
}
var characterMap = [];
characterMap[192] = "~";
characterMap[49] = "!";
characterMap[50] = "@";
characterMap[51] = "#";
characterMap[52] = "$";
characterMap[53] = "%";
characterMap[54] = "^";
characterMap[55] = "&";
characterMap[56] = "*";
characterMap[57] = "(";
characterMap[48] = ")";
characterMap[109] = "_";
characterMap[107] = "+";
characterMap[219] = "{";
characterMap[221] = "}";
characterMap[220] = "|";
characterMap[59] = ":";
characterMap[222] = "\"";
characterMap[188] = "<";
characterMap[190] = ">";
characterMap[191] = "?";
characterMap[32] = " ";
var character = "";
if (isShiftKey) {
if ( characterCode >= 65 && characterCode <= 90 ) {
character = String.fromCharCode(characterCode);
} else {
character = characterMap[characterCode];
}
} else {
if ( characterCode >= 65 && characterCode <= 90 ) {
character = String.fromCharCode(characterCode).toLowerCase();
} else {
character = String.fromCharCode(characterCode);
}
}
return character;
}
Oui. Ça à l'air bon. Je voulais savoir s'il y avait une solution acceptée avant d'essayer la méthode de la force brute. Merci pour la réponse.
Cela fonctionne, mais il est en effet bouleversant qu'il n'y a pas de solution acceptée standard.
Toute réflexion sur la manière de faire ce compte pour les dispositions de clavier non américain (par exemple, shift + 3 sur un clavier britannique est le symbole sterling livres)?
Tout dépend de l'événement que vous lierez. string.fromcharcode () sera compte de shiftkey pendant la onekyPress événement. Cependant, il ne l'intéressera pas au cours de l'événement ONKEYDOODDOWDOX .
Est-ce pris en charge dans tous les navigateurs?
Élargir sur la réponse WSAMS, voici une solution plus complète qui prend plus de mémoire, mais est plus performant
var characterMapShift = [];
characterMapShift[8] = "";
characterMapShift[9] = "";
characterMapShift[13] = "\n";
characterMapShift[16] = "";
characterMapShift[17] = "";
characterMapShift[18] = "";
characterMapShift[19] = "";
characterMapShift[20] = "";
characterMapShift[27] = "";
characterMapShift[32] = " ";
characterMapShift[33] = "";
characterMapShift[34] = "";
characterMapShift[35] = "";
characterMapShift[36] = "";
characterMapShift[37] = "";
characterMapShift[38] = "";
characterMapShift[39] = "";
characterMapShift[40] = "";
characterMapShift[45] = "";
characterMapShift[46] = "";
characterMapShift[48] = ")";
characterMapShift[49] = "!";
characterMapShift[50] = "@";
characterMapShift[51] = "#";
characterMapShift[52] = "$";
characterMapShift[53] = "%";
characterMapShift[54] = "^";
characterMapShift[55] = "&";
characterMapShift[56] = "*";
characterMapShift[57] = "(";
characterMapShift[59] = ":";
characterMapShift[61] = "+";
characterMapShift[65] = "A";
characterMapShift[66] = "B";
characterMapShift[67] = "C";
characterMapShift[68] = "D";
characterMapShift[69] = "E";
characterMapShift[70] = "F";
characterMapShift[71] = "G";
characterMapShift[72] = "H";
characterMapShift[73] = "I";
characterMapShift[74] = "J";
characterMapShift[75] = "K";
characterMapShift[76] = "L";
characterMapShift[77] = "M";
characterMapShift[78] = "N";
characterMapShift[79] = "O";
characterMapShift[80] = "P";
characterMapShift[81] = "Q";
characterMapShift[82] = "R";
characterMapShift[83] = "S";
characterMapShift[84] = "T";
characterMapShift[85] = "U";
characterMapShift[86] = "V";
characterMapShift[87] = "W";
characterMapShift[88] = "X";
characterMapShift[89] = "Y";
characterMapShift[90] = "Z";
characterMapShift[91] = "";
characterMapShift[92] = "";
characterMapShift[93] = "";
characterMapShift[96] = "0";
characterMapShift[97] = "1";
characterMapShift[98] = "2";
characterMapShift[99] = "3";
characterMapShift[100] = "4";
characterMapShift[101] = "5";
characterMapShift[102] = "6";
characterMapShift[103] = "7";
characterMapShift[104] = "8";
characterMapShift[105] = "9";
characterMapShift[106] = "*";
characterMapShift[107] = "+";
characterMapShift[109] = "_";
characterMapShift[107] = "+";
characterMapShift[111] = "/";
characterMapShift[112] = "";
characterMapShift[113] = "";
characterMapShift[114] = "";
characterMapShift[115] = "";
characterMapShift[116] = "";
characterMapShift[117] = "";
characterMapShift[118] = "";
characterMapShift[119] = "";
characterMapShift[120] = "";
characterMapShift[121] = "";
characterMapShift[122] = "";
characterMapShift[123] = "";
characterMapShift[144] = "";
characterMapShift[145] = "";
characterMapShift[186] = ":";
characterMapShift[187] = "+";
characterMapShift[188] = "<";
characterMapShift[189] = "_";
characterMapShift[190] = ">";
characterMapShift[191] = "?";
characterMapShift[192] = "~";
characterMapShift[219] = "{";
characterMapShift[220] = "|";
characterMapShift[221] = "}";
characterMapShift[222] = "\"";
var characterMap = [];
characterMap[8] = "";
characterMap[9] = "";
characterMap[13] = "\n";
characterMap[16] = "";
characterMap[17] = "";
characterMap[18] = "";
characterMap[19] = "";
characterMap[20] = "";
characterMap[27] = "";
characterMap[32] = " ";
characterMap[33] = "";
characterMap[34] = "";
characterMap[35] = "";
characterMap[36] = "";
characterMap[37] = "";
characterMap[38] = "";
characterMap[39] = "";
characterMap[40] = "";
characterMap[45] = "";
characterMap[46] = "";
characterMap[48] = "0";
characterMap[49] = "1";
characterMap[50] = "2";
characterMap[51] = "3";
characterMap[52] = "4";
characterMap[53] = "5";
characterMap[54] = "6";
characterMap[55] = "7";
characterMap[56] = "8";
characterMap[57] = "9";
characterMap[59] = ";";
characterMap[61] = "=";
characterMap[65] = "a";
characterMap[66] = "b";
characterMap[67] = "c";
characterMap[68] = "d";
characterMap[69] = "e";
characterMap[70] = "f";
characterMap[71] = "g";
characterMap[72] = "h";
characterMap[73] = "i";
characterMap[74] = "j";
characterMap[75] = "k";
characterMap[76] = "l";
characterMap[77] = "m";
characterMap[78] = "n";
characterMap[79] = "o";
characterMap[80] = "p";
characterMap[81] = "q";
characterMap[82] = "r";
characterMap[83] = "s";
characterMap[84] = "t";
characterMap[85] = "u";
characterMap[86] = "v";
characterMap[87] = "w";
characterMap[88] = "x";
characterMap[89] = "y";
characterMap[90] = "z";
characterMap[91] = "";
characterMap[92] = "";
characterMap[93] = "";
characterMap[96] = "0";
characterMap[97] = "1";
characterMap[98] = "2";
characterMap[99] = "3";
characterMap[100] = "4";
characterMap[101] = "5";
characterMap[102] = "6";
characterMap[103] = "7";
characterMap[104] = "8";
characterMap[105] = "9";
characterMap[106] = "*";
characterMap[107] = "+";
characterMap[109] = "_";
characterMap[107] = "+";
characterMap[111] = "/";
characterMap[112] = "";
characterMap[113] = "";
characterMap[114] = "";
characterMap[115] = "";
characterMap[116] = "";
characterMap[117] = "";
characterMap[118] = "";
characterMap[119] = "";
characterMap[120] = "";
characterMap[121] = "";
characterMap[122] = "";
characterMap[123] = "";
characterMap[144] = "";
characterMap[145] = "";
characterMap[186] = ";";
characterMap[187] = "=";
characterMap[188] = ",";
characterMap[189] = "-";
characterMap[190] = ".";
characterMap[191] = "/";
characterMap[192] = "`";
characterMap[219] = "[";
characterMap[220] = "\\";
characterMap[221] = "]";
characterMap[222] = "'";
function mapKeyPressToActualCharacter(isShiftKey, characterCode) {
if (typeof isShiftKey != "boolean" || typeof characterCode != "number") {
return false;
}
if (isShiftKey) {
return characterMapShift[characterCode];
} else {
return characterMap[characterCode];
}
}
Quel est le contexte de la question. Essayez-vous de voir si la touche SQUAFT a été enfoncée pendant un événement KeyPress, Keyup, Keydown. Ou évaluez-vous une chaîne de caractères et souhaitez-vous savoir s'il est supérieur / minuscule ou de caractère spécial?
Je sais comment vérifier si la touche Maj enfoncée lors d'un événement clé. Ce que je demande, c'est s'il existe un moyen d'obtenir le caractère de la touche enfoncée (une méthode qui prend en compte la touche Maj)
Ce n'est toujours pas clair ce que vous voulez. Voulez-vous le personnage réel qui a été saisi? La clé physique réelle appuyée?
J'ai utilisé string.fromcharcode () pour obtenir la valeur clé à partir d'un code-clés comme suit: string.fromcharcode (/ * codcode pour 'a' * /) // 'a' si je maintiens le quart de travail ou non la valeur est toujours "A" (capital a). Maintenant, il n'y a toujours pas de problème. Dans ce cas, je viens de vérifier si la touche Maj n'est pas bas (et le verrouillage des capuchons est éteint) et utilisez string.tolowercase (). Cela fonctionne comme prévu (la valeur est "A" normalement et "A" avec Shift). Maintenant, le problème vient lorsque je tapez des numéros (puisque string.touppercase ("1") == "1") Ce que je veux vraiment, c'est quelque chose à appliquer comme étant: ("1" sans quart de travail et "!" )