public override bool EditComponent(ITypeDescriptorContext context, object component, IServiceProvider provider, IWin32Window owner)
{
if (provider != null)
{
var workflow = (ExpressionBuilderGraph)provider.GetService(typeof(ExpressionBuilderGraph));
var editorState = (IWorkflowEditorState)provider.GetService(typeof(IWorkflowEditorState));
if (workflow != null && editorState != null && editorState.WorkflowRunning)
{
var editorForm = editorForms.FirstOrDefault(form => form.Tag == component);
if (editorForm == null)
{
editorForm = new TypeVisualizerDialog();
var videoPlayer = new VideoPlayer {
Dock = DockStyle.Fill
};
editorForm.AddControl(videoPlayer);
var captureNode = workflow.FirstOrDefault(node => ExpressionBuilder.GetWorkflowElement(node.Value) == component);
var captureInspector = captureNode != null ? captureNode.Value as InspectBuilder : null;
if (captureInspector == null)
{
return(false);
}
var captureOutput = captureInspector.Output.Merge();
var capture = (FileCapture)component;
var captureFrame = captureOutput
.Select(image => Tuple.Create((IplImage)image, (int)capture.Capture.GetProperty(CaptureProperty.PosFrames)))
.Do(frame => videoPlayer.Update(frame.Item1, frame.Item2 - 1));
var frameRate = 0.0;
IDisposable captureFrameHandle = null;
EventHandler workflowStoppedHandler = (sender, e) => editorForm.Close();
editorState.WorkflowStopped += workflowStoppedHandler;
editorForm.HandleCreated += (sender, e) =>
{
videoPlayer.Loop = capture.Loop;
videoPlayer.Playing = capture.Playing;
frameRate = capture.Capture.GetProperty(CaptureProperty.Fps);
videoPlayer.PlaybackRate = capture.PlaybackRate == 0 ? frameRate : capture.PlaybackRate;
videoPlayer.FrameCount = (int)capture.Capture.GetProperty(CaptureProperty.FrameCount);
captureFrameHandle = captureFrame.Subscribe();
};
editorForm.FormClosed += (sender, e) =>
{
captureFrameHandle.Dispose();
editorState.WorkflowStopped -= workflowStoppedHandler;
editorForms.Remove(editorForm);
};
videoPlayer.LoopChanged += (sender, e) => capture.Loop = videoPlayer.Loop;
videoPlayer.PlayingChanged += (sender, e) => capture.Playing = videoPlayer.Playing;
videoPlayer.PlaybackRateChanged += (sender, e) => capture.PlaybackRate = videoPlayer.PlaybackRate == frameRate ? 0 : Math.Max(1, videoPlayer.PlaybackRate);
videoPlayer.Seek += (sender, e) => capture.Seek(e.FrameNumber);
editorForm.Tag = capture;
editorForm.Text = capture.FileName;
editorForm.Show(owner);
editorForms.Add(editorForm);
}
editorForm.Activate();
return(true);
}
}
return(false);
}