/// <summary>
/// Constructor from a Graph file
/// </summary>
/// <param name="graphFileName">Path of Graph File to load</param>
public DSGraphEditPanel(string graphFileName)
{
InitializeComponent();
int hr = 0;
// create filter graph
_graph = (IFilterGraph) new FilterGraph();
_filterGraphCreated = true;
// give the filter graph to the DaggerUIGraph
dsDaggerUIGraph1._Graph = _graph;
// mark it as having been created internally
dsDaggerUIGraph1._filterGraphCreated = true;
#if DEBUG
rot = new DsROTEntry(_graph);
#endif
// Initialize items common to all constructors
Init();
// try to load the graph from IStorage
try
{
hr = FilterGraphTools.LoadGraphFile(_graphBuilder, graphFileName);
Marshal.ThrowExceptionForHR(hr);
}
catch (Exception ex)
{
// release the filtergraph and rethrow the exception
Marshal.ReleaseComObject(_graph);
throw ex;
}
// get the state
_mediaControl.GetState(100, out _mediaState);
// Have the graph signal event via window callbacks for performance
_mediaEventEx = (IMediaEventEx)_graph;
hr = _mediaEventEx.SetNotifyWindow(this.Handle, WMGraphNotify, IntPtr.Zero);
DsError.ThrowExceptionForHR(hr);
// sync the loaded graph and arrange the nodes
dsDaggerUIGraph1.SyncGraphs(null);
dsDaggerUIGraph1.ArrangeNodes(AutoArrangeStyle.All);
}
public bool LoadGraph(string filename, on_graph_load onload)
{
try
{
Clear();
FilterGraphTools.LoadGraphFile(graphBuilder, filename);
onload();
ReloadGraph();
return(true);
}
catch (COMException e)
{
ShowCOMException(e, "Error loading graph " + filename);
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Can't load graph");
}
return(false);
}