/// <summary>
/// When the array is updated, enqueue the data for that update in <c>animationQueue</c>.
/// </summary>
/// <param name="src">Object that raised the event.</param>
/// <param name="args">Contains the array to be drawn, and array indexes being compared.</param>
public void OnArrayModified(object src, ArrayEventArgs args)
{
lock (queueLock)
{
animationQueue.Enqueue(args);
}
}
/// <summary>
/// On a timer tick, dequeue from <c>animationQueue</c> and update current image based on the <c>ArrayEventArgs</c>.
/// Redraw <c>visualizerPicBox</c>.
/// </summary>
/// <param name="src">Object that raised the event.</param>
/// <param name="args">Additional arguments with the event.</param>
private void animationTimerTick(Object src, EventArgs args)
{
lock (queueLock)
{
if (animationQueue.Count > 0)
{
ArrayEventArgs arrayArgs = animationQueue.Dequeue();
int[] arrayToDraw = arrayArgs.array;
Graphics visualizerGraphics = Graphics.FromImage(currentImage);
visualizerGraphics.Clear(Color.Empty);
int canvasWidth = currentImage.Width;
float barWidth = (float)canvasWidth / arrayToDraw.Length;
float offset = (canvasWidth - arrayToDraw.Length * barWidth) / 2; // Centers the bars in the middle of the visualizer
Pen pen = new Pen(Color.White, barWidth);
for (int i = 0; i < arrayToDraw.Length; i++)
{
if (i == arrayArgs.currIndex)
{
pen.Color = Color.FromArgb(236, 78, 79);
}
else if (i == arrayArgs.checkedIndex)
{
pen.Color = Color.FromArgb(39, 185, 152);
}
else
{
pen.Color = Color.White;
}
visualizerGraphics.DrawLine(pen, offset + i * barWidth, currentImage.Height, offset + i * barWidth, currentImage.Height - arrayToDraw[i]);
}
visualizerGraphics.Dispose();
picBoxVisualizer.Refresh();
}
}
}
