changeset 155:ae9be6b6b522

* Add Thumbwheel widget for all our zooming needs
* Use QSettings to save/restore window size and position -- precursor to
  switching our preferences to QSettings as well -- wish I'd noticed it sooner
* Only suspend writes (not reads from the underlying cache objects) from the
  fft caches when repainting the spectrogram -- performance should now be
  significantly better

--- a/data/fft/FFTDataServer.cpp	Thu Aug 03 12:42:15 2006 +0000
+++ b/data/fft/FFTDataServer.cpp	Thu Aug 03 15:40:11 2006 +0000
@@ -369,6 +369,7 @@
     std::cerr << "FFTDataServer(" << this << ")::~FFTDataServer()" << std::endl;
 #endif
 
+    m_suspended = false;
     m_exiting = true;
     m_condition.wakeAll();
     if (m_fillThread) {
@@ -411,6 +412,15 @@
 }
 
 void
+FFTDataServer::suspendWrites()
+{
+#ifdef DEBUG_FFT_SERVER
+    std::cerr << "FFTDataServer(" << this << "): suspendWrites" << std::endl;
+#endif
+    m_suspended = true;
+}
+
+void
 FFTDataServer::resume()
 {
 #ifdef DEBUG_FFT_SERVER

--- a/data/fft/FFTDataServer.h	Thu Aug 03 12:42:15 2006 +0000
+++ b/data/fft/FFTDataServer.h	Thu Aug 03 15:40:11 2006 +0000
@@ -74,6 +74,7 @@
     bool       isColumnReady(size_t x);
 
     void       suspend();
+    void       suspendWrites();
     void       resume(); // also happens automatically if new data needed
 
     // Convenience functions:

--- a/data/model/FFTModel.h	Thu Aug 03 12:42:15 2006 +0000
+++ b/data/model/FFTModel.h	Thu Aug 03 15:40:11 2006 +0000
@@ -101,6 +101,7 @@
     virtual Model *clone() const;
 
     virtual void suspend() { m_server->suspend(); }
+    virtual void suspendWrites() { m_server->suspendWrites(); }
     virtual void resume() { m_server->resume(); }
 
 private: