Add button to autostrech for each file

stretchtoolbar.cpp

@@ -37,6 +37,9 @@ StretchToolbar::StretchToolbar(QWidget *parent) : QToolBar(tr("Stretch toolbar")
     QAction *superPixelButton = addAction(QIcon(":/bayer.png"), tr("Superpixel CFA draw 2x2 pixel as one"));
     superPixelButton->setCheckable(true);
     connect(superPixelButton, SIGNAL(toggled(bool)), this, SIGNAL(superPixel(bool)));
+
+    m_autoStretchOnLoad = addAction(QIcon(":/nuke_a.png"), tr("Auto stretch"));
+    m_autoStretchOnLoad->setCheckable(true);
 }
 
 void StretchToolbar::stretchImage(Image *img)
@@ -63,3 +66,10 @@ void StretchToolbar::resetMTF()
     emit paramChanged(0, 0.5, 1);
 }
 
+void StretchToolbar::imageLoaded(Image *img)
+{
+    if(m_autoStretchOnLoad->isChecked())
+        stretchImage(img);
+}
+
+