TIMOB-13436 - TEST CASE

gistfile1.js

var win = Ti.UI.createWindow({backgroundColor:'white'});
 
var hover = Ti.UI.iOS.createCoverFlowView({
    width:320,
    height:200
})
 
var images = [];
var imagefiles = [];
var dir = Titanium.Filesystem.getFile(Ti.Filesystem.resourcesDirectory);
// Open the data folder
var dirItems = dir.getDirectoryListing();
// get a list of all files in this folder
var filename = null;
// contains the filename
var imagefile = null;
// contains the full image file name
var wissel = false;
  
// loop through the directory listing selecting all .JPG files
Ti.API.info(dirItems);


 for (var i = 0; i < dirItems.length; i++) {
	// check if the file contains .JPG as extension
	// convert to string first
	filename = dirItems[i].toString();
	// if this is a .JPG file, then process it
	if (filename.indexOf('.JPG') >= 0) {
		// add  image to coverflow view
		var p = {};
		var newImageFile = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory, filename);
		if (newImageFile.exists() == false) {
			newImageFile.createFile();
		}
		if (newImageFile.exists()) {
			var newImage = Titanium.Filesystem.getFile(Titanium.Filesystem.resourcesDirectory, filename);
			newImageFile.write(newImage);
		} else {
			Ti.API.info('[WARN] Cannot find image');
		}
		p.imageFile = Titanium.Filesystem.applicationDataDirectory + filename;
		p.command = 'Add';
		AddImageToCoverFlowView(p);
		// save filename for later
		imagefiles.push(filename);
	}
}
if (imagefiles.length == 0 ) {
	alert('Please include some image files with `.JPG` extension in your documents directory');
}

function modifyImage(e) {
	// just change the time in the center of the image
	if (e.index < images.length) {
		var imageFile = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory, imagefiles[e.index]);
		if (imageFile.exists()) {
			// read the image first
			var image = imageFile.read();
			imageFile = null;
			// release the file handle
			// create a view to put the image in the background
			var vw = Ti.UI.createView({
				backgroundImage : image,
				width : 320,
				height : 200,
			});
			// get the current date time
			var txt = new Date();
			// create a label to put the date in
			var label = Ti.UI.createLabel({
				text : txt,
				width : Ti.UI.SIZE,
				height : Ti.UI.SIZE,
				backgroundColor : "#fff",
				color : "#000",
				font : {
					fontSize : 20,
					fontFamily : 'HelveticaNeue-Bold'
				},
				minimumFontSize : 8,
				textAlign : 'center'
			});
			// add the label to the view
			vw.add(label);
			// get an image of the new view
			var newImage = vw.toImage();
			// overwrite the old image
			var imageFile = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory, imagefiles[e.index]);
			if (imageFile.exists()) {
				imageFile.write(newImage);
			} else {
				alert('cannot find image');
			}
			// cleanup view and label
			vw.remove(label);
			vw = null;
			label = null;
			newImage = null;
			txt = null;
			// now the image is ready to be resaved on the coverflow
			var p = {};
			p.command = 'Change';
			p.index = e.index;
			AddImageToCoverFlowView(p);
		}
	}
}

function AddImageToCoverFlowView(p) {
	Ti.API.info(p);
	// check if it is a change or add
	if ('command' in p) {
		switch (p.command) {

			case 'Add':
				// adds an image to the end of the CoverflowView
				var image = {
					image : p.imageFile,
					height : 150,
					width : 240
				};
				images.push(image);
				hover.setImages(images);
				break;

			case 'Change':
				// make sure there is an index
				if ('index' in p) {
					if (p.index < hover.images.length) {
						hover.setImage(parseInt(p.index), images[parseInt(p.index)]);
					}
				}
				break;
		}
	}
}
 
 
hover.addEventListener('click',modifyImage);

 
win.add(hover);
 
win.open();

Couple of things:
a) To my understanding I cannot write tot the resources directory. In my app I use the data directory actually
b) If my directory contains both JPG and other types of files I still get the alert error message. It would be better to test after the loop if images.length === 0. Then there are no JPG files in that folder.

regards
Nico