From caed9b7b05005ee2bcec8e7262bf5f63fe2a4df8 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Wed, 28 Aug 2013 16:53:18 +0100
Subject: signal node preview

---
 rotord/src/graph.cpp | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'rotord/src/graph.cpp')

diff --git a/rotord/src/graph.cpp b/rotord/src/graph.cpp
index dc3e13e..9536fdc 100644
--- a/rotord/src/graph.cpp
+++ b/rotord/src/graph.cpp
@@ -33,11 +33,22 @@ bool Graph::signal_render(string &signal_xml,const float framerate) {
 	return false;
 }
 */
-bool Graph::preview(xmlIO &XML,string node,int w,int h){
+bool Graph::preview(xmlIO &XML,string node,int frame,int w,int h){
 	//
 	//bool imencode(const string& ext, InputArray img, vector<uchar>& buf, const vector<int>& params=vector<int>())
-
-	return true;
+	//if (find_node_id)
+	if (nodes.find(node)!=nodes.end()){
+		float t=frame*framerate;
+		if (dynamic_cast<Signal_node*>(nodes[node])){
+			Time_spec ts=Time_spec(t,framerate,0.0f);
+			XML.addValue("signal",dynamic_cast<Signal_node*>(nodes[node])->get_output(ts));
+			return true;
+		}
+		if (dynamic_cast<Image_node*>(nodes[node])){
+			return true;	
+		}
+	}
+	return false;
 }
 
 bool Graph::video_render(const string &output_filename,const string &audio_filename,const float framerate,float& progress) {
-- 
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