guacamole实现虚拟键盘

要做的事情比较简单，就是先实例化一个虚拟键盘，然后监听事件即可。

js代码

    //虚拟键盘数据
    var a = 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","Left":[{"title":"←","keysym":65361}],"Up":[{"title":"↑","keysym":65362}],"Right":[{"title":"→","keysym":65363}],"Down":[{"title":"↓","keysym":65364}],"Menu":[{"title":"Menu","keysym":65383}],"LShift":[{"title":"Shift","modifier":"shift","keysym":65505}],"RShift":[{"title":"Shift","modifier":"shift","keysym":65506}],"LCtrl":[{"title":"Ctrl","modifier":"control","keysym":65507}],"RCtrl":[{"title":"Ctrl","modifier":"control","keysym":65508}],"Caps":[{"title":"Caps","modifier":"caps","keysym":65509}],"LAlt":[{"title":"Alt","modifier":"alt","keysym":65513}],"RAlt":[{"title":"Alt","modifier":"alt","keysym":65514}],"Super":[{"title":"Super","modifier":"super","keysym":65515}],"`":[{"title":"`","requires":[]},{"title":"~","requires":["shift"]}],"-":[{"title":"-","requires":[]},{"title":"_","requires":["shift"]}],"=":[{"title":"=","requires":[]},{"title":"+","requires":["shift"]}],",":[{"title":",","requires":[]},{"title":"<","requires":["shift"]}],".":[{"title":".","requires":[]},{"title":">","requires":["shift"]}],"/":[{"title":"/","requires":[]},{"title":"?","requires":["shift"]}],"[":[{"title":"[","requires":[]},{"title":"{","requires":["shift"]}],"]":[{"title":"]","requires":[]},{"title":"}","requires":["shift"]}],"\\":[{"title":"\\","requires":[]},{"title":"|","requires":["shift"]}],";":[{"title":";","requires":[]},{"title":":","requires":["shift"]}],"'":[{"title":"'","requires":[]},{"title":"\"","requires":["shift"]}],"q":[{"title":"q","requires":[]},{"title":"Q","requires":["caps"]},{"title":"Q","requires":["shift"]},{"title":"q","requires":["caps","shift"]}],"w":[{"title":"w","requires":[]},{"title":"W","requires":["caps"]},{"title":"W","requires":["shift"]},{"title":"w","requires":["caps","shift"]}],"e":[{"title":"e","requires":[]},{"title":"E","requires":["caps"]},{"title":"E","requires":["shift"]},{"title":"e","requires":["caps","shift"]}],"r":[{"title":"r","requires":[]},{"title":"R","requires":["caps"]},{"title":"R","requires":["shift"]},{"title":"r","requires":["caps","shift"]}],"t":[{"title":"t","requires":[]},{"title":"T","requires":["caps"]},{"title":"T","requires":["shift"]},{"title":"t","requires":["caps","shift"]}],"y":[{"title":"y","requires":[]},{"title":"Y","requires":["caps"]},{"title":"Y","requires":["shift"]},{"title":"y","requires":["caps","shift"]}],"u":[{"title":"u","requires":[]},{"title":"U","requires":["caps"]},{"title":"U","requires":["shift"]},{"title":"u","requires":["caps","shift"]}],"i":[{"title":"i","requires":[]},{"title":"I","requires":["caps"]},{"title":"I","requires":["shift"]},{"title":"i","requires":["caps","shift"]}],"o":[{"title":"o","requires":[]},{"title":"O","requires":["caps"]},{"title":"O","requires":["shift"]},{"title":"o","requires":["caps","shift"]}],"p":[{"title":"p","requires":[]},{"title":"P","requires":["caps"]},{"title":"P","requires":["shift"]},{"title":"p","requires":["caps","shift"]}],"a":[{"title":"a","requires":[]},{"title":"A","requires":["caps"]},{"title":"A","requires":["shift"]},{"title":"a","requires":["caps","shift"]}],"s":[{"title":"s","requires":[]},{"title":"S","requires":["caps"]},{"title":"S","requires":["shift"]},{"title":"s","requires":["caps","shift"]}],"d":[{"title":"d","requires":[]},{"title":"D","requires":["caps"]},{"title":"D","requires":["shift"]},{"title":"d","requires":["caps","shift"]}],"f":[{"title":"f","requires":[]},{"title":"F","requires":["caps"]},{"title":"F","requires":["shift"]},{"title":"f","requires":["caps","shift"]}],"g":[{"title":"g","requires":[]},{"title":"G","requires":["caps"]},{"title":"G","requires":["shift"]},{"title":"g","requires":["caps","shift"]}],"h":[{"title":"h","requires":[]},{"title":"H","requires":["caps"]},{"title":"H","requires":["shift"]},{"title":"h","requires":["caps","shift"]}],"j":[{"title":"j","requires":[]},{"title":"J","requires":["caps"]},{"title":"J","requires":["shift"]},{"title":"j","requires":["caps","shift"]}],"k":[{"title":"k","requires":[]},{"title":"K","requires":["caps"]},{"title":"K","requires":["shift"]},{"title":"k","requires":["caps","shift"]}],"l":[{"title":"l","requires":[]},{"title":"L","requires":["caps"]},{"title":"L","requires":["shift"]},{"title":"l","requires":["caps","shift"]}],"z":[{"title":"z","requires":[]},{"title":"Z","requires":["caps"]},{"title":"Z","requires":["shift"]},{"title":"z","requires":["caps","shift"]}],"x":[{"title":"x","requires":[]},{"title":"X","requires":["caps"]},{"title":"X","requires":["shift"]},{"title":"x","requires":["caps","shift"]}],"c":[{"title":"c","requires":[]},{"title":"C","requires":["caps"]},{"title":"C","requires":["shift"]},{"title":"c","requires":["caps","shift"]}],"v":[{"title":"v","requires":[]},{"title":"V","requires":["caps"]},{"title":"V","requires":["shift"]},{"title":"v","requires":["caps","shift"]}],"b":[{"title":"b","requires":[]},{"title":"B","requires":["caps"]},{"title":"B","requires":["shift"]},{"title":"b","requires":["caps","shift"]}],"n":[{"title":"n","requires":[]},{"title":"N","requires":["caps"]},{"title":"N","requires":["shift"]},{"title":"n","requires":["caps","shift"]}],"m":[{"title":"m","requires":[]},{"title":"M","requires":["caps"]},{"title":"M","requires":["shift"]},{"title":"m","requires":["caps","shift"]}]},"layout":[["Esc",0.7,"F1","F2","F3","F4",0.7,"F5","F6","F7","F8",0.7,"F9","F10","F11","F12"],[0.1],{"main":{"alpha":[["`","1","2","3","4","5","6","7","8","9","0","-","=","Back"],["Tab","q","w","e","r","t","y","u","i","o","p","[","]","\\"],["Caps","a","s","d","f","g","h","j","k","l",";","'","Enter"],["LShift","z","x","c","v","b","n","m",",",".","/","RShift"],["LCtrl","Super","LAlt","Space","RAlt","Menu","RCtrl"]],"movement":[["Ins","Home","PgUp"],["Del","End","PgDn"],[1],["Up"],["Left","Down","Right"]]}}],"keyWidths":{"Back":2,"Tab":1.5,"\\":1.5,"Caps":1.85,"Enter":2.25,"LShift":2.1,"RShift":3.1,"LCtrl":1.6,"Super":1.6,"LAlt":1.6,"Space":6.1,"RAlt":1.6,"Menu":1.6,"RCtrl":1.6,"Ins":1.6,"Home":1.6,"PgUp":1.6,"Del":1.6,"End":1.6,"PgDn":1.6}};

    //虚拟键盘
    var onScreenKeyboard = new Guacamole.OnScreenKeyboard(a);
    document.getElementById('osk').appendChild(onScreenKeyboard.getElement());
    onScreenKeyboard.onkeydown = function(keysym) {
        client.sendKeyEvent(1, keysym);
    };
    onScreenKeyboard.onkeyup = function(keysym) {
        // Do something ...
        client.sendKeyEvent(0, keysym);
    };

给键盘一个容器

<div class="osk" id="osk">
</div>

键盘的css样式

.osk {
    position: relative;
}

.guac-keyboard {
    display: inline-block;
    width: 100%;

    margin: 0;
    padding: 0;
    cursor: default;

    text-align: left;
    vertical-align: middle;
}

.guac-keyboard,
.guac-keyboard * {
    overflow: hidden;
    white-space: nowrap;
}

.guac-keyboard .guac-keyboard-key-container {
    display: inline-block;
    margin: 0.05em;
    position: relative;
}

.guac-keyboard .guac-keyboard-key {

    position: absolute;
    left:   0;
    right:  0;
    top:    0;
    bottom: 0;

    background: #444;

    border: 0.125em solid #666;
    -moz-border-radius:    0.25em;
    -webkit-border-radius: 0.25em;
    -khtml-border-radius:  0.25em;
    border-radius:         0.25em;

    color: white;
    font-size: 40%;
    font-weight: lighter;
    text-align: center;
    white-space: pre;

    text-shadow:  1px  1px 0 rgba(0, 0, 0, 0.25),
                  1px -1px 0 rgba(0, 0, 0, 0.25),
                 -1px  1px 0 rgba(0, 0, 0, 0.25),
                 -1px -1px 0 rgba(0, 0, 0, 0.25);

}

.guac-keyboard .guac-keyboard-key:hover {
    cursor: pointer;
}

.guac-keyboard .guac-keyboard-key.highlight {
    background: #666;
    border-color: #666;
}

/* Align some keys to the left */
.guac-keyboard .guac-keyboard-key-caps,
.guac-keyboard .guac-keyboard-key-enter,
.guac-keyboard .guac-keyboard-key-tab,
.guac-keyboard .guac-keyboard-key-lalt,
.guac-keyboard .guac-keyboard-key-ralt,
.guac-keyboard .guac-keyboard-key-alt-gr,
.guac-keyboard .guac-keyboard-key-lctrl,
.guac-keyboard .guac-keyboard-key-rctrl,
.guac-keyboard .guac-keyboard-key-lshift,
.guac-keyboard .guac-keyboard-key-rshift {
    text-align: left;
    padding-left: 0.75em;
}

/* Active shift */
.guac-keyboard.guac-keyboard-modifier-shift .guac-keyboard-key-rshift,
.guac-keyboard.guac-keyboard-modifier-shift .guac-keyboard-key-lshift,

/* Active ctrl */
.guac-keyboard.guac-keyboard-modifier-control .guac-keyboard-key-rctrl,
.guac-keyboard.guac-keyboard-modifier-control .guac-keyboard-key-lctrl,

/* Active alt */
.guac-keyboard.guac-keyboard-modifier-alt .guac-keyboard-key-ralt,
.guac-keyboard.guac-keyboard-modifier-alt .guac-keyboard-key-lalt,

/* Active alt-gr */
.guac-keyboard.guac-keyboard-modifier-alt-gr .guac-keyboard-key-alt-gr,

/* Active caps */
.guac-keyboard.guac-keyboard-modifier-caps .guac-keyboard-key-caps,

/* Active super */
.guac-keyboard.guac-keyboard-modifier-super .guac-keyboard-key-super {
    background: #882;
    border-color: #DD4;
}

.guac-keyboard .guac-keyboard-key.guac-keyboard-pressed {
    background: #822;
    border-color: #D44;
}

.guac-keyboard .guac-keyboard-group {
    line-height: 0;
}

.guac-keyboard .guac-keyboard-group.guac-keyboard-alpha,
.guac-keyboard .guac-keyboard-group.guac-keyboard-movement {
    display: inline-block;
    text-align: center;
    vertical-align: top;
}

.guac-keyboard .guac-keyboard-group.guac-keyboard-main {

    /* IE10 */
    display: -ms-flexbox;
    -ms-flex-align: stretch;
    -ms-flex-direction: row;

    /* Ancient Mozilla */
    display: -moz-box;
    -moz-box-align: stretch;
    -moz-box-orient: horizontal;

    /* Ancient WebKit */
    display: -webkit-box;
    -webkit-box-align: stretch;
    -webkit-box-orient: horizontal;

    /* Old WebKit */
    display: -webkit-flex;
    -webkit-align-items: stretch;
    -webkit-flex-direction: row;

    /* W3C */
    display: flex;
    align-items: stretch;
    flex-direction: row;

}

.guac-keyboard .guac-keyboard-group.guac-keyboard-movement {
    -ms-flex: 1 1 auto;
    -moz-box-flex: 1;
    -webkit-box-flex: 1;
    -webkit-flex: 1 1 auto;
    flex: 1 1 auto;
}

.guac-keyboard .guac-keyboard-gap {
    display: inline-block;
}

/* Hide keycaps requiring modifiers which are NOT currently active. */
.guac-keyboard:not(.guac-keyboard-modifier-caps)
.guac-keyboard-cap.guac-keyboard-requires-caps,

.guac-keyboard:not(.guac-keyboard-modifier-shift)
.guac-keyboard-cap.guac-keyboard-requires-shift,

.guac-keyboard:not(.guac-keyboard-modifier-alt-gr)
.guac-keyboard-cap.guac-keyboard-requires-alt-gr,

/* Hide keycaps NOT requiring modifiers which ARE currently active, where that
   modifier is used to determine which cap is displayed for the current key. */
.guac-keyboard.guac-keyboard-modifier-shift
.guac-keyboard-key.guac-keyboard-uses-shift
.guac-keyboard-cap:not(.guac-keyboard-requires-shift),

.guac-keyboard.guac-keyboard-modifier-caps
.guac-keyboard-key.guac-keyboard-uses-caps
.guac-keyboard-cap:not(.guac-keyboard-requires-caps),

.guac-keyboard.guac-keyboard-modifier-alt-gr
.guac-keyboard-key.guac-keyboard-uses-alt-gr
.guac-keyboard-cap:not(.guac-keyboard-requires-alt-gr) {

    display: none;

}

/* Fade out keys which do not use AltGr if AltGr is active */
.guac-keyboard.guac-keyboard-modifier-alt-gr
.guac-keyboard-key:not(.guac-keyboard-uses-alt-gr):not(.guac-keyboard-key-alt-gr) {
    opacity: 0.5;
}