Workaround a bug in Juce/MacOS file dialog stuff. Show error messages in GUI.

Source/PluginEditor.cpp

@@ -103,7 +103,7 @@ void PaulstretchpluginAudioProcessorEditor::timerCallback(int id)
 			m_wavecomponent.setRecordingPosition(processor.getRecordingPositionPercent());
 		} else
 			m_wavecomponent.setRecordingPosition(-1.0);
-		String infotext = String(processor.getPreBufferingPercent(), 1) + " " + String(processor.getStretchSource()->m_param_change_count);
+		String infotext = String(processor.getPreBufferingPercent(), 1) + " " + String(processor.getStretchSource()->m_param_change_count)+" "+m_last_err;
 		m_info_label.setText(infotext, dontSendNotification);
 	}
 	if (id == 2)
@@ -161,10 +161,17 @@ void PaulstretchpluginAudioProcessorEditor::chooseFile()
 #endif
 	FileChooser myChooser("Please select audio file...",
 		initialloc,
-		"*.wav");
+		"*.wav",true);
 	if (myChooser.browseForFileToOpen())
 	{
-		processor.setAudioFile(myChooser.getResult());
+        File resu = myChooser.getResult();
+        String pathname = resu.getFullPathName();
+        if (pathname.startsWith("/localhost"))
+        {
+            pathname = pathname.substring(10);
+            resu = File(pathname);
+        }
+        m_last_err = processor.setAudioFile(resu);
 		if (processor.getAudioFile() != File())
 		{
 			m_wavecomponent.setAudioFile(processor.getAudioFile());

Source/PluginEditor.h

@@ -330,7 +330,7 @@ private:
 	Label m_info_label;
 	SpectralChainEditor m_spec_order_ed;
 	void chooseFile();
-	
+    String m_last_err;
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PaulstretchpluginAudioProcessorEditor)
 };
 

Source/PluginProcessor.cpp

@@ -478,7 +478,11 @@ double PaulstretchpluginAudioProcessor::getRecordingPositionPercent()
 
 String PaulstretchpluginAudioProcessor::setAudioFile(File f)
 {
-	auto ai = unique_from_raw(m_afm->createReaderFor(f));
+    //if (f==File())
+    //    return String();
+    //if (f==m_current_file && f.getLastModificationTime()==m_current_file_date)
+    //    return String();
+    auto ai = unique_from_raw(m_afm->createReaderFor(f));
 	if (ai != nullptr)
 	{
 		if (ai->numChannels > 32)
@@ -494,6 +498,7 @@ String PaulstretchpluginAudioProcessor::setAudioFile(File f)
 		ScopedLock locker(m_cs);
 		m_stretch_source->setAudioFile(f);
 		m_current_file = f;
+        m_current_file_date = m_current_file.getLastModificationTime();
 		m_using_memory_buffer = false;
 		return String();
 		//MessageManager::callAsync([cb, file]() { cb(String()); });

Source/PluginProcessor.h

@@ -111,7 +111,7 @@ private:
 	int m_cur_num_out_chans = 2;
 	CriticalSection m_cs;
 	File m_current_file;
-    
+    Time m_current_file_date;
 
 	TimeSliceThread m_bufferingthread;
 	std::unique_ptr<StretchAudioSource> m_stretch_source;