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better keyboard mapping

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This commit is contained in:
Peter Cottle 2012-12-25 17:10:23 -08:00
parent 2fb843a8d6
commit f71aa87b7d
4 changed files with 50 additions and 34 deletions
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23
src/js/util/keyboard.js
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@ -1,11 +1,8 @@
var _ = require('underscore');
var Backbone = require('backbone');
function KeyboardListener(options) {
this.events = options.events || _.clone(Backbone.Events);
this.aliasMap = options.aliasMap || {};
this.keyMap = {
var mapKeycodeToKey = function(keycode) {
var keyMap = {
37: 'left',
38: 'up',
39: 'right',
@ -13,8 +10,14 @@ function KeyboardListener(options) {
27: 'esc',
13: 'enter'
};
this.keydownListener = _.bind(this.keydown, this);
return keyMap[keycode];
};
function KeyboardListener(options) {
this.events = options.events || _.clone(Backbone.Events);
this.aliasMap = options.aliasMap || {};
this.keydownListener = _.bind(this.keydown, this);
this.listen();
}
@ -30,10 +33,12 @@ KeyboardListener.prototype.keydown = function(e) {
var which = e.which;
console.log('key which', which);
if (this.keyMap[which] === undefined) {
var key = mapKeycodeToKey(which);
if (key === undefined) {
return;
}
this.fireEvent(this.keyMap[which]);
this.fireEvent(key);
};
KeyboardListener.prototype.fireEvent = function(eventName) {
@ -42,4 +47,4 @@ KeyboardListener.prototype.fireEvent = function(eventName) {
};
exports.KeyboardListener = KeyboardListener;
exports.mapKeycodeToKey = mapKeycodeToKey;