/**   A simple class for displaying file information and progress 
   Note: This is a demonstration only and not part of SWFUpload. 
   Note: Some have had problems adapting this class in IE7. It may not be 
suitable for your application. 
**/

/** Constructor 
* file is a SWFUpload file object 
* targetID is the HTML element id attribute that the FileProgress HTML 
*structure will be added to. 
* Instantiating a new FileProgress object with an existing file will 
reuse/update the existing DOM elements 
**/
function FileProgress(file, targetID) {
	this.fileProgressID = file.id;

	this.opacity = 100;
	this.height = 0;

	this.fileProgressWrapper = document.getElementById(this.fileProgressID);
	if (!this.fileProgressWrapper) {
		this.fileProgressWrapper = document.createElement("div");
		this.fileProgressWrapper.className = "progressWrapper";
		this.fileProgressWrapper.id = this.fileProgressID;

		this.fileProgressElement = document.createElement("div");
		this.fileProgressElement.className = "progressContainer";

		var progressCancel = document.createElement("a");
		progressCancel.className = "progressCancel";
		progressCancel.href = "#";
		progressCancel.style.visibility = "hidden";
		progressCancel.appendChild(document.createTextNode(" "));

		var progressText = document.createElement("div");
		progressText.className = "progressName";
		progressText.appendChild(document.createTextNode(file.name));

		var progressBar = document.createElement("div");
		progressBar.className = "progressBarInProgress";

		var progressStatus = document.createElement("div");
		progressStatus.className = "progressBarStatus";
		progressStatus.innerHTML = " ";

		this.fileProgressElement.appendChild(progressCancel);
		this.fileProgressElement.appendChild(progressText);
		this.fileProgressElement.appendChild(progressStatus);
		this.fileProgressElement.appendChild(progressBar);

		this.fileProgressWrapper.appendChild(this.fileProgressElement);

		document.getElementById(targetID).appendChild(this.fileProgressWrapper);
	} else {
		this.fileProgressElement = this.fileProgressWrapper.firstChild;
	}

	this.height = this.fileProgressWrapper.offsetHeight;

}
FileProgress.prototype.setProgress = function(percentage) {
	this.fileProgressElement.className = "progressContainer green";
	this.fileProgressElement.childNodes[3].className = "progressBarInProgress";
	this.fileProgressElement.childNodes[3].style.width = percentage + "%";
};
FileProgress.prototype.setComplete = function() {
	this.appear();
	this.fileProgressElement.className = "progressContainer blue";
	this.fileProgressElement.childNodes[3].className = "progressBarComplete";
	this.fileProgressElement.childNodes[3].style.width = "";

	var oSelf = this;
	setTimeout(function() {
		oSelf.disappear();
	}, 10000);
};
FileProgress.prototype.setError = function() {
	this.appear();
	this.fileProgressElement.className = "progressContainer red";
	this.fileProgressElement.childNodes[3].className = "progressBarError";
	this.fileProgressElement.childNodes[3].style.width = "";

	var oSelf = this;
	setTimeout(function() {
		oSelf.disappear();
	}, 5000);
};
FileProgress.prototype.setCancelled = function() {
	this.appear();
	this.fileProgressElement.className = "progressContainer";
	this.fileProgressElement.childNodes[3].className = "progressBarError";
	this.fileProgressElement.childNodes[3].style.width = "";

	var oSelf = this;
	setTimeout(function() {
		oSelf.disappear();
	}, 2000);
};
FileProgress.prototype.setStatus = function(status) {
	this.fileProgressElement.childNodes[2].innerHTML = status;
};

// Show/Hide the cancel button 
FileProgress.prototype.toggleCancel = function(show, swfUploadInstance) {
	this.fileProgressElement.childNodes[0].style.visibility = show ? "visible"
			: "hidden";
	if (swfUploadInstance) {
		var fileID = this.fileProgressID;
		this.fileProgressElement.childNodes[0].onclick = function() {
			swfUploadInstance.cancelUpload(fileID);
			return false;
		};
	}
};

// Makes sure the FileProgress box is visible 
FileProgress.prototype.appear = function() {
	if (this.fileProgressWrapper.filters) {
		try {

			this.fileProgressWrapper.filters
					.item("DXImageTransform.Microsoft.Alpha").opacit
			y = 100;
		} catch (e) {
			// If it is not set initially, the browser will throw an error. 
			//This will set it if it is not set yet. 
			this.fileProgressWrapper.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=100)";
		}
	} else {
		this.fileProgressWrapper.style.opacity = 1;
	}

	this.fileProgressWrapper.style.height = "";
	this.height = this.fileProgressWrapper.offsetHeight;
	this.opacity = 100;
	this.fileProgressWrapper.style.display = "";

};

// Fades out and clips away the FileProgress box. 
FileProgress.prototype.disappear = function() {

	var reduceOpacityBy = 15;
	var reduceHeightBy = 4;
	var rate = 30; // 15 fps 

	if (this.opacity > 0) {
		this.opacity -= reduceOpacityBy;
		if (this.opacity < 0) {
			this.opacity = 0;
		}

		if (this.fileProgressWrapper.filters) {
			try {

				this.fileProgressWrapper.filters
						.item("DXImageTransform.Microsoft.Alpha").opacit
				y = this.opacity;
			} catch (e) {
				// If it is not set initially, the browser will throw an error. 
				//This will set it if it is not set yet. 
				this.fileProgressWrapper.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity="
						+ this.opacity + ")";
			}
		} else {
			this.fileProgressWrapper.style.opacity = this.opacity / 100;
		}
	}

	if (this.height > 0) {
		this.height -= reduceHeightBy;
		if (this.height < 0) {
			this.height = 0;
		}

		this.fileProgressWrapper.style.height = this.height + "px";
	}

	if (this.height > 0 || this.opacity > 0) {
		var oSelf = this;
		setTimeout(function() {
			oSelf.disappear();
		}, rate);
	} else {
		this.fileProgressWrapper.style.display = "none";
	}
};