index.html Example File
webkitwidgets/imageanalyzer/resources/index.html<html>
<body>
<div style="float:right; width:50%; border-left: solid 1px black">
<div id="listdiv" align="center">
<h5>Images to be analyzed:</h5>
<select multiple size=10 id=imglist style="width:80%"></select>
<br />
<input type="button" id="evalbutton" value="Analyze" onclick="analyzeImages()" />
</div>
</div>
<div style="width:50%">
<div id="titleblock" align="center">
<h2>Image Analyzer</h2>
</div>
<div id=outputdiv align=center>
<h4>Status: <span id=status>Idle</span></h4>
<h5>
Latest Results:<br />
Red: <span id=redval style="color:red">n/a</span><br />
Green: <span id=greenval style="color:green">n/a</span><br />
Blue: <span id=blueval style="color:blue">n/a</span><br />
</h5>
<h3>Click on images below to select for analysis</h3>
</div>
</div>
<div id=imagediv style="clear:both; text-align:center">
<hr/>
<img src="images/mtRainier.jpg" height=150px onclick='return addImage(this);' />
<img src="images/bellaCoola.jpg" height=150px onclick='return addImage(this);'/>
<img src="images/seaShell.jpg" height=150px onclick='return addImage(this);'/>
<img src="images/flower.jpg" height=150px onclick='return addImage(this);'/>
<img src="images/trees.jpg" height=150px onclick='return addImage(this);'/>
</div>
</body>
</html>
<script type="text/javascript">
var remaining = 0;
var connected = false;
//We use this function because connect statements resolve their target once, imediately
//not at signal emission so they must be connected once the imageAnalyzer object has been added to the frame
//! <!-- [ connect slots ] -->
function connectSlots()
{
if ( !connected ) {
connected = true;
imageAnalyzer.finishedAnalysis.connect(this, finished);
imageAnalyzer.updateProgress.connect(this, updateProg);
}
}
//! <!-- [ connect slots ] -->
function finished() {
setStatus('Idle');
setResults(imageAnalyzer.red.toFixed(2), imageAnalyzer.green.toFixed(2), imageAnalyzer.blue.toFixed(2));
}
//This will function as the recieving "slot" for the progress signal
function updateProg(complete, max)
{
var oldRemaining = remaining;
remaining = max - complete;
pullList(oldRemaining - remaining);
//Prevent results getting messed up if we don't get signals in order
if( imageAnalyzer.busy ) {
setStatus('Processing (' + complete + ' of ' + max + ' completed)');
setResults('Calculating','Calculating','Calculating');
}
}
//! <!-- [ analyzeImages ] -->
function analyzeImages() {
connectSlots();
var imglist = document.getElementsByTagName('option');
if (imglist.length > 0) {
stringlist = [];
for(var i=0; i<imglist.length; i++) {
stringlist[i]=imglist[i].value;
}
if (!imageAnalyzer.busy) {
remaining = stringlist.length;
imageAnalyzer.startAnalysis(stringlist);
} else {
alert("Processing, please wait until finished.");
}
//! <!-- [ analyzeImages ] -->
} else {
alert('No images selected. Click on one or more images to select them for analysis.');
}
}
function clearList() {
var imglist = document.getElementById('imglist');
while(imglist.length > 0) {
imglist.removeChild(imglist.childNodes[0]);
}
}
function pullList(count) {
var imglist = document.getElementById('imglist');
while(imglist.length > 0 && count > 0) {
imglist.removeChild(imglist.childNodes[0]);
count--;
}
}
function setStatus(statusString) {
document.getElementById('status').innerHTML = statusString;
}
function setResults(red, green, blue) {
if (! isNaN(red) ) { red += " %"; }
if (! isNaN(green) ) { green += " %"; }
if (! isNaN(blue) ) { blue += " %"; }
document.getElementById('redval').innerHTML = red;
document.getElementById('greenval').innerHTML = green;
document.getElementById('blueval').innerHTML = blue;
}
//! <!-- [ addImage ] -->
function addImage(newimg) {
var imglist = document.getElementById('imglist');
var curChildren = imglist.childNodes;
var newline = document.createElement('option');
newline.innerHTML = newimg.src.substring(newimg.src.lastIndexOf('/')+1);
newline.value = newimg.src;
imglist.appendChild(newline);
}
//! <!-- [ addImage ] -->
</script>
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