Question

我有一个与一个键交互的代码，如果你按下它就会得到一个结果，我想知道它是否可以同时与两个键交互，例如按下Ctrl和A并得到一个结果。< / p>

感谢。

public void addText(String text, boolean timestamp) {
long timeMS = System.currentTimeMillis();
Date instant = new Date(timeMS);
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
String time = sdf.format(instant);

boolean shouldScroll = false;

try {
    HTMLDocument doc = (HTMLDocument) getChat().getDocument();
    HTMLEditorKit kit = (HTMLEditorKit) getChat().getEditorKit();
    JScrollBar vsb = getChatScroller().getVerticalScrollBar();

    BoundedRangeModel model = vsb.getModel();
    if (model.getExtent() + model.getValue() == model.getMaximum())
    shouldScroll = true;
    kit.insertHTML(doc, doc.getLength(), timestamp ? time + ": " + text : text, 0, 0, null);
    kit.insertHTML(doc, doc.getLength(), "<IMG SRC=file://res/picture.png>", 0, 0, HTML.Tag.IMG);
    if (shouldScroll)
    getChat().setCaretPosition(doc.getLength());
} catch (IOException | BadLocationException e) {
    e.printStackTrace();
}
}

Answer 1

如果已按下event.ctrlKey，您可以查看：

document.addEventListener('keydown', function(event) {
  console.log(event.ctrlKey)
}, false)

Answer 2

document.addEventListener('keydown', function(event) {
  if(event.ctrlKey && (event.keyCode === 76)) {
    document.getElementById('key').innerHTML = 'Get Money';
  }
});

document.addEventListener('keyup', function() {    
  document.getElementById('key').innerHTML = 'Give It Back';
});

<div id="key"></div>

Answer 3

在您的事件处理程序中检查Control是否已关闭：http://www.w3schools.com/jsref/event_ctrlkey.asp

与两个键交互

3 个答案: