bug 26 followup - warn of missing alias on variety of instances (export/import/effect/mix,) in addition to first time the read fails.\nIn addition make sure there is only one warning on the screen at a time, bringing the old one to the foreground (although for things like export/effect there will be a progress bar in front of it, the missing files dialog will be above the project window when it finishes)

src/AudioIO.cpp

@@ -479,14 +479,15 @@ void DeinitAudioIO()
 
 void AudioIO::MarkAliasedFilesMissingWarning()
 {
-   // only show the warning when we are playing or recording
-   if (IsStreamActive()) {
-      m_aliasMissingWarning = true;
-   }
+   m_aliasMissingWarning = true;
 }
 
 void AudioIO::SetMissingAliasedFileWarningShouldShow(bool b)
 {
+   // Note that this is can be called by both the main thread and other threads.
+   // I don't believe we need a mutex because we are checking zero vs non-zero,
+   // and the setting from other threads will always be non-zero (true), and the
+   // setting from the main thread is always false.
    m_aliasMissingWarningShouldShow = b;
    // reset the warnings as they were probably marked by a previous run
    if (m_aliasMissingWarningShouldShow) {
@@ -501,6 +502,17 @@ bool AudioIO::ShouldShowMissingAliasedFileWarning()
    return ret;
 }
 
+void AudioIO::SetMissingAliasFileDialog(wxDialog *dialog)
+{
+   m_aliasMissingWarningDialog = dialog;
+}
+   
+wxDialog *AudioIO::GetMissingAliasFileDialog()
+{
+   return m_aliasMissingWarningDialog;
+}
+
+
 wxString DeviceName(const PaDeviceInfo* info)
 {
    wxString infoName(info->name, wxConvLocal);
@@ -534,8 +546,9 @@ AudioIO::AudioIO()
    mAudioThreadFillBuffersLoopActive = false;
    mPortStreamV19 = NULL;
 
-   m_aliasMissingWarningShouldShow = false;
+   m_aliasMissingWarningShouldShow = true;
    m_aliasMissingWarning           = false;
+   m_aliasMissingWarningDialog     = NULL;
 
 #ifdef EXPERIMENTAL_MIDI_OUT
    mMidiStream = NULL;