/// <summary>
/// Handles a "Find Shortest Path" event.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void uxFindPath_Click(object sender, EventArgs e)
{
if (!_map.ContainsNode(uxStartNode.Text))
{
ShowError(uxStartNode.Text);
}
else if (!_map.ContainsNode(uxEndNode.Text))
{
ShowError(uxEndNode.Text);
}
else
{
Dictionary <string, string> paths;
decimal len = Math.Round(ShortestPath(uxStartNode.Text, uxEndNode.Text, _map, out paths), 1);
uxNodeList.Items.Clear();
if (len < 0)
{
uxDistance.Text = "";
MessageBox.Show("No path found.");
}
else
{
uxDistance.Text = len + _distanceUnit;
uxNodeList.BeginUpdate();
AddPath(uxStartNode.Text, uxEndNode.Text, paths, uxNodeList.Items);
uxNodeList.EndUpdate();
}
}
}
/// <summary>
/// Handles a Navigated event on the map.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void uxMap_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
if (uxMap.Url.Host == _mapServerHost)
{
bool viewingNode = uxMap.Url.AbsolutePath.StartsWith(_nodePrefix) &&
_map.ContainsNode(uxMap.Url.AbsolutePath.Substring(_nodePrefix.Length));
uxSetStart.Enabled = viewingNode;
uxSetEnd.Enabled = viewingNode;
}
else
{
uxSetStart.Enabled = false;
uxSetEnd.Enabled = false;
uxFindPath.Enabled = false;
}
}
