From 2bc51a33ae4089d88a3a8a3e5fb56afafac69d35 Mon Sep 17 00:00:00 2001
From: Felix Domke <tmbinc@elitedvb.net>
Date: Fri, 25 May 2007 00:51:08 +0000
Subject: add 'spinner' (non-idle detection)

---
 lib/gdi/grc.cpp | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 80 insertions(+), 2 deletions(-)

(limited to 'lib/gdi/grc.cpp')

diff --git a/lib/gdi/grc.cpp b/lib/gdi/grc.cpp
index 736630a8..b3ad2ccc 100644
--- a/lib/gdi/grc.cpp
+++ b/lib/gdi/grc.cpp
@@ -32,6 +32,7 @@ gRC::gRC(): rp(0), wp(0)
 	else
 		eDebug("RC thread created successfully");
 #endif
+	m_spinner_enabled = 0;
 }
 
 DEFINE_REF(gRC);
@@ -131,8 +132,46 @@ void *gRC::thread()
 			}
 #ifndef SYNC_PAINT
 			while(rp == wp)
-				pthread_cond_wait(&cond, &mutex);
-			pthread_mutex_unlock(&mutex);
+			{
+			
+					/* when the main thread is non-idle for a too long time without any display output,
+					   we want to display a spinner. */
+
+				struct timeval time;
+				struct timespec timeout;
+				gettimeofday(&time, NULL);
+				timeout.tv_sec = time.tv_sec;
+				timeout.tv_nsec = time.tv_usec * 1000;
+				
+				if (m_spinner_enabled)
+					timeout.tv_nsec += 100*1000*1000;
+				else
+					timeout.tv_nsec += 500*1000*1000;
+
+					/* yes, this is required. */
+				if (timeout.tv_nsec > 1000*1000*1000)
+				{
+					timeout.tv_nsec -= 1000*1000*1000;
+					timeout.tv_sec++;
+				}
+
+				int idle = 1;
+
+				if (pthread_cond_timedwait(&cond, &mutex, &timeout) == ETIMEDOUT)
+				{
+					if (eApp && !eApp->isIdle())
+						idle = 0;
+				}
+				
+				pthread_mutex_unlock(&mutex);
+
+				if (!idle)
+				{
+					enableSpinner();
+					eDebug("main thread is non-idle! display spinner!");
+				} else
+					disableSpinner();
+			}
 #endif
 		}
 	}
@@ -152,6 +191,39 @@ gRC *gRC::getInstance()
 	return instance;
 }
 
+void gRC::enableSpinner()
+{
+	if (!m_spinner_dc)
+	{
+		eDebug("no spinner DC!");
+		return;
+	}
+
+	m_spinner_enabled = 1;
+
+	gOpcode o;
+	o.opcode = m_spinner_enabled ? gOpcode::incrementSpinner : gOpcode::enableSpinner;
+	m_spinner_dc->exec(&o);
+}
+
+void gRC::disableSpinner()
+{
+	if (!m_spinner_enabled)
+		return;
+
+	if (!m_spinner_dc)
+	{
+		eDebug("no spinner DC!");
+		return;
+	}
+
+	m_spinner_enabled = 0;
+	
+	gOpcode o;
+	o.opcode = gOpcode::disableSpinner;
+	m_spinner_dc->exec(&o);
+}
+
 static int gPainter_instances;
 
 gPainter::gPainter(gDC *dc, eRect rect): m_dc(dc), m_rc(gRC::getInstance())
@@ -678,6 +750,12 @@ void gDC::exec(gOpcode *o)
 		break;
 	case gOpcode::flush:
 		break;
+	case gOpcode::enableSpinner:
+		break;
+	case gOpcode::disableSpinner:
+		break;
+	case gOpcode::incrementSpinner:
+		break;
 	default:
 		eFatal("illegal opcode %d. expect memory leak!", o->opcode);
 	}
-- 
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