/// <summary>
/// Display tweets for the word the user is hovering over.
/// If a tweet popup is currently displayed, move popup window until the mouse is over a different word.
/// </summary>
protected void OnMouseMove(object sender, MouseEventArgs args)
{
var hits = wordNodeMap.Where(w => w.Value.Region.Contains(args.Location));
Point windowPos = PointToScreen(args.Location);
windowPos.Offset(50, 70);
if (hits.Count() > 0)
{
string word = hits.First().Key;
TextNode node = hits.First().Value;
if (mouseWord == word)
{
tweetForm.Location = windowPos;
}
else
{
if (tweetForm == null)
{
tweetForm = new TweetForm();
tweetForm.Location = windowPos;
tweetForm.Show();
tweetForm.TopMost = true;
}
// We have a new word.
tweetForm.tbTweets.Clear();
ShowTweets(word);
mouseWord = word;
}
}
else
{
// Just move the window.
if (tweetForm != null)
{
tweetForm.Location = windowPos;
tweetForm.TopMost = true;
}
}
}
protected void Setup()
{
diagram = new Diagram(this);
rnd = new Random();
bool overrun = false;
diagram.Arrange();
timer = new System.Windows.Forms.Timer();
timer.Interval = 1000 / 20; // 20 times a second, in milliseconds.
timer.Tick += (sender, args) => pnlCloud.Invalidate(true);
pnlCloud.Paint += (sender, args) =>
{
Graphics gr = args.Graphics;
gr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
++paintIteration;
// ReduceCounts();
if (!overrun)
{
overrun = true;
int maxTweets = 20;
// We assume here that we can parse the data faster than the incoming stream hands it to us.
// But we put in a safety check to handle only 20 tweets.
while (tweetQueue.Count > 0 && (--maxTweets > 0))
{
string tweet;
lock (this)
{
tweet = tweetQueue.Dequeue();
}
SynchronousUpdate(tweet);
}
// gr.Clear(Color.White);
diagram.Iterate(Diagram.DEFAULT_DAMPING, Diagram.DEFAULT_SPRING_LENGTH, Diagram.DEFAULT_MAX_ITERATIONS);
diagram.Draw(gr, Rectangle.FromLTRB(12, 24, pnlCloud.Width - 12, pnlCloud.Height - 36));
// gr.DrawString(paintIteration.ToString() + " " + diagram.Nodes.Count.ToString() + " " + tweetQueue.Count.ToString() + " " + diagram.layout.Count.ToString(), font, brushBlack, new Point(3, 3));
overrun = false;
}
else
{
gr.DrawString("overrun", font, brushBlack, new Point(3, 3));
}
};
pnlCloud.MouseMove += OnMouseMove;
pnlCloud.MouseLeave += (sender, args) =>
{
if (tweetForm != null)
{
tweetForm.Close();
tweetForm = null;
mouseWord = String.Empty;
}
};
timer.Start();
Node node = new SpotNode(Color.Black);
rootNode = node;
diagram.AddNode(node);
}