Class: Index

Inherits:
WebPage show all
Defined in:
lib/h2g_ajaxchat.rb

Instance Attribute Summary

Attributes inherited from WebPage

#css, #html, #js, #s

Instance Method Summary collapse

Methods inherited from WebPage

#to_s

Constructor Details

#initialize(h) ⇒ Index

Returns a new instance of Index.



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# File 'lib/h2g_ajaxchat.rb', line 188

def initialize(h)
  @name, @h = :index, h
end

Instance Method Details

#to_css ⇒ Object 



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# File 'lib/h2g_ajaxchat.rb', line 192

def to_css()
@css ||= '
body {font-family: Arial;}
#chatbox {overflow: scroll; height: 40%}
div p span {colour: #dde}
'
end

#to_html ⇒ Object 



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# File 'lib/h2g_ajaxchat.rb', line 200

def to_html()
  
  b = binding
  
@html ||= <<EOF
<body onload="refresh()">
<div id="wrapper">
 <div id="menu">
  <p class="welcome">Welcome, <b> <%= @h[:username] %> </b></p>
  <p class="logout"><a id="exit" href="logout">Exit Chat</a></p>
  <div style="clear:both"></div>
 </div>	
 <div id="chatbox"></div>
  <input name="usermsg" type="text" id="usermsg" size="33" onkeyup='ajaxCall1(event.keyCode, this)' autofocus='true'/>

</div>      
EOF

  ERB.new(@html).result(b)
end

#to_js ⇒ Object 



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# File 'lib/h2g_ajaxchat.rb', line 221

def to_js()

@js ||= <<EOF
  
function updateScroll(){
var element = document.getElementById("chatbox");
element.scrollTop = element.scrollHeight;
}  
// ajaxCall1();

function ajaxRequest(url, cFunction) {
  var xhttp;
  xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
  cFunction(this);
}
  };
  xhttp.open("GET", url, true);
  xhttp.send();
}


function ajaxCall1(keyCode, e) {
  if (keyCode==13){
ajaxRequest('chatter?msg=' + e.value, ajaxResponse1)
e.value = '';
  }  
}

function ajaxResponse1(xhttp) {
  e = document.getElementById('chatbox')
  s = xhttp.responseText;
  e.innerHTML = e.innerHTML + s;
  
  if (s.length > 1)
updateScroll();
}

function refresh() {
  setInterval(ajaxCall2,2000);
}

function ajaxCall2() {
  ajaxRequest('chatter', ajaxResponse1)
}

EOF

end