/// <summary>
/// The method that runs when the thread has started
/// </summary>
protected override void OnDoWork(DoWorkEventArgs e)
{
//If a FileEntry has been set
if(task.Key != null)
{
//Variable for the Bitmap image
Bitmap image;
//Save the entry and ranged
entry = task.Key;
range = task.Value;
//Create variables to store the average colors
double avgRed = -1,
avgGreen = -1,
avgBlue = -1;
try
{
//Try to load the image
image = new Bitmap(entry.getFilePath());
}
catch(System.ArgumentException) //not an image
{
entry.setStatus("Finished");
return;
}
//Create an instance of the LockBitmap Class
LockBitmap lbm = new LockBitmap(image);
//Lock the image into memory
lbm.LockBits();
//If the pixel range is empty
if (range == Point.Empty)
{
//Calculate all rows within the image
range = new Point(0, image.Height);
}
//Calculate the number of pixels in the image
int numberOfPixels = (range.Y - range.X) * image.Width;
//Set the number of rows calculated to 0
int rowsDone = 0;
//Set the progress to 0
ReportProgress(0);
//For every row of pixels
for (int y = range.X; y < range.Y; y++)
{
//For every column of pixels
for (int x = 0; x < image.Width; x++)
{
//Get the pixel data
Color pixel = lbm.GetPixel(x, y);
//Add the colors to the average
avgRed += pixel.R;
avgGreen += pixel.G;
avgBlue += pixel.B;
}
//Increase the rows done
rowsDone++;
//Every 50th row report progress
if (y % 50 == 0 || y == range.Y - 1)
{
//Calculate the progress
int progress = rowsDone * image.Width;
//Add the progress to the entry
entry.addProgress(progress);
//Reset the rows calculated back to 0
rowsDone = 0;
//Report the entry's progress to the ListView
ReportProgress((int)progress);
}
}
//Calculate the average values and send them to the FileEntry
if (avgRed != -1 && avgGreen != -1 && avgBlue != -1)
{
entry.setRed((avgRed + 1) / numberOfPixels);
entry.setGreen((avgGreen + 1) / numberOfPixels);
entry.setBlue((avgBlue + 1) / numberOfPixels);
}
}
}
/// <summary>
/// Add a single FileEntry to the FileManager
/// </summary>
/// <param name="fileName">The name of the file being added</param>
/// <param name="filePath">The path of the file being added</param>
private void add(string fileName, string filePath)
{
//Local reference to the entry
FileEntry entry = new FileEntry(fileName, filePath, threadsPerImage);
//Add the entry to the files list
files.Add(entry);
filesWaiting++;
}
/// <summary>
/// This method is called when the thread reaches the end of OnDoWork()
/// </summary>
protected override void OnRunWorkerCompleted(RunWorkerCompletedEventArgs e)
{
//If the thread has a current FileEntry
if(entry != null)
{
//If it's status is Finished
if(entry.getStatus() == "Finished")
{
//Get a local reference to SubItems
System.Windows.Forms.ListViewItem.ListViewSubItemCollection subItems = listView_overview.Items[entry.getEntryNumber()].SubItems;
//Set all the information in the ListView
subItems[3].Text = "Finished";
subItems[4].Text = entry.getRed();
subItems[5].Text = entry.getGreen();
subItems[6].Text = entry.getBlue();
//Grab the hex value from the entry
string hexValue = entry.getHex();
subItems[7].Text = hexValue;
//If the hex value is not null (visually represented by "-")
if (hexValue != "-")
{
//Color the background of the cell
subItems[8].BackColor = ColorTranslator.FromHtml("#" + hexValue);
//Remove the text placeholder
subItems[8].Text = String.Empty;
}
//Set the entry to null
entry = null;
}
}
//Enter the critical section, lock the lock
Monitor.Enter(this.taskLock);
try
{
//If there is still work left to be done
if (fileManager.FilesWaiting > 0)
{
//Grab a new task
task = fileManager.getTask();
//Start again
this.RunWorkerAsync();
}
//Else all the work is done
else
{
//Report to the thread manager this thread has nothing left to do
Done(this, e);
}
}
finally { Monitor.Exit(taskLock); } //Leave the critical section
}