comparison base/Selection.cpp @ 300:5877d68815c7

* Change WaveFileModel API from getValues(start,end) to getData(start,count).
  It's much less error-prone to pass in frame counts instead of start/end
  locations.  Should have done this ages ago.  This closes #1794563.
* Add option to apply a transform to only the selection region, instead of
  the whole audio.
* (to make the above work properly) Add start frame offset to wave models

     if (!m_selections.empty()) {
 	m_selections.clear();
     }
 }
 
+void
+MultiSelection::getExtents(size_t &startFrame, size_t &endFrame) const
+{
+    startFrame = 0;
+    endFrame = 0;
+    
+    for (SelectionList::const_iterator i = m_selections.begin();
+	 i != m_selections.end(); ++i) {
+
+        if (i == m_selections.begin() || i->getStartFrame() < startFrame) {
+            startFrame = i->getStartFrame();
+        }
+
+        if (i == m_selections.begin() || i->getEndFrame() > endFrame) {
+            endFrame = i->getEndFrame();
+        }
+    }
+}
+
 Selection
 MultiSelection::getContainingSelection(size_t frame, bool defaultToFollowing) const
 {
     // This scales very badly with the number of selections, but it's
     // more efficient for very small numbers of selections than a more