From 16401d145463245fb06e2272805f70f27ba8d88a Mon Sep 17 00:00:00 2001
From: Luis Lucas <luisfrlucas@gmail.com>
Date: Sat, 22 Mar 2014 15:23:23 +0000
Subject: [PATCH] Very initial implementation to track pixel coordinates and
 value using mouse.

---
 external_lib/scode/viewarea.cpp |  1 -
 external_lib/scode/viewarea.h   |  1 +
 source/InputStream.h            |  5 +++++
 source/PlaYUVerFrame.cpp        |  6 ++++++
 source/PlaYUVerFrame.h          |  3 +++
 source/SubWindowHandle.cpp      |  2 +-
 source/SubWindowHandle.h        |  5 +++++
 source/TypeDef.h                | 15 +++++++++++++++
 source/plaYUVerApp.cpp          | 26 ++++++++++++++++++++++++--
 source/plaYUVerApp.h            |  1 +
 10 files changed, 61 insertions(+), 4 deletions(-)

diff --git a/external_lib/scode/viewarea.cpp b/external_lib/scode/viewarea.cpp
index 5843b59..7fdf86e 100755
--- a/external_lib/scode/viewarea.cpp
+++ b/external_lib/scode/viewarea.cpp
@@ -220,7 +220,6 @@ void ViewArea::updateSize()
     // perform the necessary updates (updateOffset). 
     resize( p->width(), p->height() );
   }
-
   if( w <= width() && h <= height() )
     updateOffset();
 }
diff --git a/external_lib/scode/viewarea.h b/external_lib/scode/viewarea.h
index c1eb0b7..e207186 100755
--- a/external_lib/scode/viewarea.h
+++ b/external_lib/scode/viewarea.h
@@ -103,6 +103,7 @@ public:
 signals:
   void selectionChanged( const QRect &rect );
   void positionChanged( const QPoint &pos );
+  void updateStatusBar( const QPoint &actualPos, int &luma, int &chromaU, int &chromaV );
   void zoomFactorChanged( double );
 
 public slots:
diff --git a/source/InputStream.h b/source/InputStream.h
index 7935d41..466aa0c 100755
--- a/source/InputStream.h
+++ b/source/InputStream.h
@@ -160,6 +160,11 @@ public:
     }
   }
 
+  PlaYUVerFrame *getCurrentFrame()
+  {
+    return m_cCurrFrame;
+  }
+
 };
 
 }  // NAMESPACE
diff --git a/source/PlaYUVerFrame.cpp b/source/PlaYUVerFrame.cpp
index 7f93389..6be9d63 100755
--- a/source/PlaYUVerFrame.cpp
+++ b/source/PlaYUVerFrame.cpp
@@ -207,4 +207,10 @@ UInt64 PlaYUVerFrame::getBytesPerFrame()
   return 0;
 }
 
+Pel PlaYUVerFrame::getPixelValueFromYUV(const QPoint &pos, YUVcomponent color)
+{
+  return m_pppcInputPel[color][0][pos.y()*m_uiWidth+pos.x()];
+}
+
+
 }  // NAMESPACE
diff --git a/source/PlaYUVerFrame.h b/source/PlaYUVerFrame.h
index 5823561..47e5910 100755
--- a/source/PlaYUVerFrame.h
+++ b/source/PlaYUVerFrame.h
@@ -56,6 +56,9 @@ public:
   {
     return m_pppcRGBPel;
   }
+
+  Pel getPixelValueFromYUV(const QPoint &pos, YUVcomponent color);
+
 private:
 
   Void YUV420toRGB();
diff --git a/source/SubWindowHandle.cpp b/source/SubWindowHandle.cpp
index 9ea4ca6..f128e93 100644
--- a/source/SubWindowHandle.cpp
+++ b/source/SubWindowHandle.cpp
@@ -249,7 +249,7 @@ QSize SubWindowHandle::sizeHint() const
     maxSize = p->size();
   }
 
-  QSize isize = QSize( m_pCurrStream->getWidth() + 500, m_pCurrStream->getHeight() + 500 );
+  QSize isize = QSize( m_pCurrStream->getWidth() + 50, m_pCurrStream->getHeight() + 50 );
 
   // If the SubWindowHandle needs more space that the avaiable, we'll give
   // to the subwindow a reasonable size preserving the image aspect ratio.
diff --git a/source/SubWindowHandle.h b/source/SubWindowHandle.h
index e92233b..f3f57b9 100644
--- a/source/SubWindowHandle.h
+++ b/source/SubWindowHandle.h
@@ -75,6 +75,11 @@ public:
     return m_pCurrStream;
   }
 
+  ViewArea* getViewArea()
+  {
+    return m_cViewArea;
+  }
+
   /**
    * Show the image at its original size
    */
diff --git a/source/TypeDef.h b/source/TypeDef.h
index 4f21545..152a043 100644
--- a/source/TypeDef.h
+++ b/source/TypeDef.h
@@ -115,6 +115,21 @@ enum InputStreamColorSpace
   NO_FMT = -1, YUV420, YUV400, YUV422, RGB,
 };
 
+enum YUVcomponent
+{
+  LUMA = 0,
+  CHROMA_U,
+  CHROMA_V,
+};
+
+enum RGBcomponent
+{
+  COLOR_R = 0,
+  COLOR_G,
+  COLOR_B,
+};
+
+
 
 }
 
diff --git a/source/plaYUVerApp.cpp b/source/plaYUVerApp.cpp
index 53580c5..c9e9324 100644
--- a/source/plaYUVerApp.cpp
+++ b/source/plaYUVerApp.cpp
@@ -117,6 +117,8 @@ void plaYUVerApp::open()
       addSubWindow( interfaceChild );
       statusBar()->showMessage( tr( "File loaded" ), 2000 );
       interfaceChild->show();
+      connect( interfaceChild->getViewArea(), SIGNAL( positionChanged(const QPoint &) ), this, SLOT( updatePixelValueStatusBar(const QPoint &) ) );
+
     }
     else
     {
@@ -576,8 +578,8 @@ QMdiSubWindow *plaYUVerApp::findSubWindow( const QString &fileName )
   foreach( QMdiSubWindow * window, mdiArea->subWindowList() ){
   SubWindowHandle *mdiChild = qobject_cast<SubWindowHandle *>( window);
   if( mdiChild->currentFile() == canonicalFilePath )
-  return window;
-}
+    return window;
+  }
   return 0;
 }
 
@@ -588,4 +590,24 @@ void plaYUVerApp::setActiveSubWindow( QWidget *window )
   mdiArea->setActiveSubWindow( qobject_cast<QMdiSubWindow *>( window ) );
 }
 
+void plaYUVerApp::updatePixelValueStatusBar(const QPoint & pos)
+{
+  Pel pixel;
+  Int iWidth, iHeight;
+  Int posX = pos.x(), posY = pos.y();
+  QString strStatus = QString("X=%1 Y=%2 ").arg(posX).arg(posY);
+
+  SubWindowHandle *currentSubWindow = activeSubWindow();
+  iWidth = currentSubWindow->getInputStream()->getWidth();
+  iHeight = currentSubWindow->getInputStream()->getHeight();
+
+  if( (posX<iWidth) && (posX>=0) && (posY<iHeight) && (posY>=0) )
+  {
+    pixel = currentSubWindow->getInputStream()->getCurrentFrame()->getPixelValueFromYUV(pos, LUMA);
+    QString strAux = QString("Luma= %1").arg(pixel);
+    strStatus.append(strAux);
+    statusBar()->showMessage( strStatus , 0 );
+  }
+}
+
 }  // NAMESPACE
diff --git a/source/plaYUVerApp.h b/source/plaYUVerApp.h
index bd3b8db..71d8d68 100644
--- a/source/plaYUVerApp.h
+++ b/source/plaYUVerApp.h
@@ -84,6 +84,7 @@ private Q_SLOTS:
   void dropEvent(QDropEvent *event);
 
   void setActiveSubWindow( QWidget *window );
+  void updatePixelValueStatusBar(const QPoint & pos);
 
 private:
   QMdiArea *mdiArea;