JS组合按键事件监听,支持同时监听多组按键如{a,b,c,}{ctrl,c}
- <script type="text/javascript">
- (function(){
- /**
- *dqKeys v1.0.0 | (c) 2016 www.findme.wang
- *@params json keys 监听的按键
- *@params bool isOrder 按键是否有相应的顺序
- *@params Function sucFuc 完成按键的回调函数
- *@params Function cancelFuc 完成按键取消后的回调函数
- *@author lidequan
- */
- var dqKeys = function(keys,isOrder,sucFuc,cancelFuc) {
- // 函数体
- return new dqKeys.fn.init(keys,isOrder,sucFuc,cancelFuc);
- }
- dqKeys.fn = dqKeys.prototype = {
- 'version':'1.0.0', //版本号
- 'author':'lidequan', //作者
- 'rightKeys':{}, //监听的按键{key:code},code为按键对应的ascii码
- 'curKeys':[], //当前按下的键
- 'sucFuc':null, //完成按键的回调函数
- 'cancelFuc':null, //完成按键取消后的回调函数
- 'isFinsh':false, //判断是否完成按键
- 'isOrder':false, //按键是否有相应的顺序
- init:function(keys,isOrder,sucFuc,cancelFuc){
- this.rightKeys=keys;
- this.sucFuc=sucFuc;
- this.cancelFuc=cancelFuc;
- this.isOrder=isOrder;
- return this;
- },
- listenkeys:function(){//监听用户键盘操作
- var _self=this;
- _self.addListener('keydown', function(oEvent){
- var oEvent =oEvent || window.event;
- if(!_self.arrayContain(_self.curKeys,oEvent.keyCode)){
- if(_self.isOrder && _self.getNextKey() == oEvent.keyCode){
- _self.curKeys.push(oEvent.keyCode);
- }else if(!_self.isOrder){
- _self.curKeys.push(oEvent.keyCode);
- }
- }
- if(_self.checkResult(_self.rightKeys,_self.curKeys)){
- if(_self.sucFuc && !_self.isFinsh){
- _self.sucFuc();
- }
- _self.isFinsh=true;
- }
- });
- _self.addListener('keyup', function(oEvent){
- var oEvent =oEvent || window.event;
- if(_self.checkResult(_self.rightKeys,_self.curKeys) && _self.isFinsh){
- //完成按键,又取消的事件
- if(_self.cancelFuc){
- _self.cancelFuc();
- }
- }
- _self.curKey=_self.remove(_self.curKeys,oEvent.keyCode);
- _self.isFinsh=false;
- });
- },
- arrayContain:function(arr,val){//判断数组中是否包含某个元素
- return (arr.indexOf(val) == -1) ? false:true;
- },
- checkResult:function(json,arr){ //判断用户是否按下监听的所有按键
- for(var i in json){
- if(arr.indexOf(json[i])==-1){
- return false;
- }
- }
- return true;
- },
- remove:function(arr,val) { //从数组中移除某个元素
- var index = arr.indexOf(val);
- if (index > -1) {
- arr.splice(index, 1);
- }
- return arr;
- },
- getNextKey:function(){ //获取下一次按键对应的ascii码
- for(var i in this.rightKeys){
- if(this.curKeys.indexOf(this.rightKeys[i])==-1){
- return this.rightKeys[i];
- }
- }
- return null;
- },
- addListener:function(ev,fn,bool){ //事件绑定
- if (document.attachEvent) {
- document.attachEvent('on' + ev, fn);
- }else{
- document.addEventListener(ev,fn,bool);
- }
- }
- }
- dqKeys.fn.init.prototype = dqKeys.fn;
- window.dqKeys = window.$$= dqKeys;
- })();
- //1.测试
- dqKeys({'a':65,'b':66},true,function(){
- console.log('okey');
- },function(){
- console.log('cancel');
- }).listenkeys();
- //2.测试
- var dqKeys=new $$({'c':67,'d':68},false,function(){
- console.log('keys down ');
- },function(){
- console.log('keys cancel');
- });
- dqKeys.listenkeys();
- </script>
来源: https://www.oschina.net/code/snippet_2725767_58803