comparison view/View.cpp @ 513:1341e95eeae9

* Make drawing segment divisions optional in segmentation plot style of
  time value layer
* Don't follow playback when Alt is held down (complements use of Alt as
  peek modifier)

         (getXForFrame(m_playPointerFrame) != getXForFrame(newFrame));
     size_t oldPlayPointerFrame = m_playPointerFrame;
     m_playPointerFrame = newFrame;
     if (!visibleChange) return;
 
+    bool somethingGoingOn =
+        ((QApplication::mouseButtons() != Qt::NoButton) ||
+         (QApplication::keyboardModifiers() & Qt::AltModifier));
+
     switch (m_followPlay) {
 
     case PlaybackScrollContinuous:
-	if (QApplication::mouseButtons() == Qt::NoButton) {
+	if (!somethingGoingOn) {
 	    setCentreFrame(m_playPointerFrame, false);
 	}
 	break;
 
     case PlaybackScrollPage:

 #ifdef DEBUG_VIEW_WIDGET_PAINT
 	std::cerr << "xnew = " << xnew << ", width = " << width() << std::endl;
 #endif
 
 	if (xnew < width()/8 || xnew > (width()*7)/8) {
-	    if (QApplication::mouseButtons() == Qt::NoButton) {
+	    if (!somethingGoingOn) {
 		long offset = getFrameForX(width()/2) - getStartFrame();
 		long newCentre = sf + offset;
 		bool changed = setCentreFrame(newCentre, false);
 		if (changed) {
 		    xold = getXForFrame(oldPlayPointerFrame);