fileprogress.js

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/*
      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.reset();
      }

      this.height = this.fileProgressWrapper.offsetHeight;
      this.setTimer(null);


}

FileProgress.prototype.setTimer = function (timer) {
      this.fileProgressElement["FP_TIMER"] = timer;
};
FileProgress.prototype.getTimer = function (timer) {
      return this.fileProgressElement["FP_TIMER"] || null;
};

FileProgress.prototype.reset = function () {
      this.fileProgressElement.className = "progressContainer";

      this.fileProgressElement.childNodes[2].innerHTML = " ";
      this.fileProgressElement.childNodes[2].className = "progressBarStatus";
      
      this.fileProgressElement.childNodes[3].className = "progressBarInProgress";
      this.fileProgressElement.childNodes[3].style.width = "0%";
      
      this.appear();    
};

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

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

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

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

      var oSelf = this;
      this.setTimer(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;
            };
      }
};

FileProgress.prototype.appear = function () {
      if (this.getTimer() !== null) {
            clearTimeout(this.getTimer());
            this.setTimer(null);
      }
      
      if (this.fileProgressWrapper.filters) {
            try {
                  this.fileProgressWrapper.filters.item("DXImageTransform.Microsoft.Alpha").opacity = 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").opacity = 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;
            this.setTimer(setTimeout(function () {
                  oSelf.disappear();
            }, rate));
      } else {
            this.fileProgressWrapper.style.display = "none";
            this.setTimer(null);
      }
};