Gale suggested showing current key shortcuts for toolbar controls tooltips. This implements it for ControlToolBar (aka Transport toolbar).

One tricky aspect was that until GetActiveProject() is ready to return non-NULL,  ControlToolBar::RegenerateToolsTooltips() cannot get the project's CommandManager, so cannot get the shortcuts. Changed ControlToolBar::RegenerateToolsTooltips() to be public and now call it late in wAudacityProject(). When called before the project is completely instantiated, in the rewritten ControlToolBar::RegenerateToolsTooltips(), it just sets the tooltips to the names without the keys, pretty much as now -- but I don't think users will ever see that because of the subsequent call. 

Anyway, did it in a more programmatic way than the previous code, which reduces string literals duplication.

Btw, I changed the start value for the ID_PLAY_BUTTON because the former value of 0 causes FindWindow() to return the toolbar rather than the button -- wxWidgets bug. 

Also got rid of some cruft and applied a few WXUNUSED.

src/Project.cpp

@@ -497,6 +497,10 @@ AudacityProject *CreateNewAudacityProject()
    //Set the new project as active:
    SetActiveProject(p);
 
+   // Okay, GetActiveProject() is ready. Now we can get its CommandManager, 
+   // and add the shortcut keys to the tooltips. 
+   p->GetControlToolBar()->RegenerateToolsTooltips();
+
    ModuleManager::Dispatch(ProjectInitialized);
 
    p->Show(true);

src/commands/CommandManager.cpp

@@ -1239,7 +1239,7 @@ void CommandManager::HandleXMLEndTag(const wxChar *tag)
    if (!wxStrcmp(tag, wxT("audacitykeyboard"))) {
       wxMessageBox(wxString::Format(_("Loaded %d keyboard shortcuts\n"),
                                     mXMLKeysRead),
-                   _("Loading keyboard shortcuts"),
+                   _("Loading Keyboard Shortcuts"),
                    wxOK | wxCENTRE);
    }
 }

src/toolbars/ControlToolBar.cpp

@@ -183,10 +183,10 @@ void ControlToolBar::Populate()
       ID_STOP_BUTTON, false, _("Stop"));
 
    mRewind = MakeButton(bmpRewind, bmpRewind, bmpRewindDisabled,
-      ID_REW_BUTTON, false, _("Start"));
+      ID_REW_BUTTON, false, _("Skip to Start"));
 
    mFF = MakeButton(bmpFFwd, bmpFFwd, bmpFFwdDisabled,
-      ID_FF_BUTTON, false, _("End"));
+      ID_FF_BUTTON, false, _("Skip to End"));
 
    mRecord = MakeButton(bmpRecord, bmpRecord, bmpRecordDisabled,
       ID_RECORD_BUTTON, true, _("Record"));
@@ -204,12 +204,42 @@ void ControlToolBar::Populate()
 void ControlToolBar::RegenerateToolsTooltips()
 {
 #if wxUSE_TOOLTIPS
-   mPause->SetToolTip(_("Pause"));
-   mPlay->SetToolTip(_("Play (Shift for Loop Play)"));
-   mStop->SetToolTip(_("Stop"));
-   mRewind->SetToolTip(_("Skip to Start"));
-   mFF->SetToolTip(_("Skip to End"));
-   mRecord->SetToolTip(_("Record (Shift for Append Record)"));
+   // ID_BATCH_BUTTON is not an actual button, so use it as loop bound. 
+   for (long iWinID = ID_PLAY_BUTTON; iWinID < ID_BATCH_BUTTON; iWinID++)
+   {
+      wxWindow* pCtrl = this->FindWindow(iWinID); 
+      wxString strToolTip = pCtrl->GetLabel();
+      AudacityProject* pProj = GetActiveProject();
+      CommandManager* pCmdMgr = (pProj) ? pProj->GetCommandManager() : NULL;
+      if (pCmdMgr)
+      {
+         wxString strKey(wxT(" ("));
+         switch (iWinID)
+         {
+            case ID_PLAY_BUTTON:
+               strKey += pCmdMgr->GetKeyFromName(strToolTip);
+               strKey += _(") / Loop Play (");
+               strKey += pCmdMgr->GetKeyFromName(wxT("PlayLooped"));
+               break;
+            case ID_RECORD_BUTTON:
+               strKey += pCmdMgr->GetKeyFromName(strToolTip);
+               strKey += _(") / Append Record (");
+               strKey += pCmdMgr->GetKeyFromName(wxT("RecordAppend"));
+               break;
+            case ID_FF_BUTTON:
+               strKey += pCmdMgr->GetKeyFromName(wxT("SkipEnd"));
+               break;
+            case ID_REW_BUTTON:
+               strKey += pCmdMgr->GetKeyFromName(wxT("SkipStart"));
+               break;
+            default:
+               strKey += pCmdMgr->GetKeyFromName(strToolTip);
+         }
+         strKey += wxT(")");
+         strToolTip += strKey;
+      }
+      pCtrl->SetToolTip(strToolTip);
+   }
 #endif
 }
 
@@ -330,7 +360,6 @@ void ControlToolBar::EnableDisableButtons()
 {
    //TIDY-ME: Button logic could be neater.
    AudacityProject *p = GetActiveProject();
-   size_t numProjects = gAudacityProjects.Count();
    bool tracks = false;
    bool playing = mPlay->IsDown();
    bool recording = mRecord->IsDown();
@@ -654,7 +683,7 @@ void ControlToolBar::OnKeyUp(wxKeyEvent & event)
    }
 }
 
-void ControlToolBar::OnPlay(wxCommandEvent &evt)
+void ControlToolBar::OnPlay(wxCommandEvent & WXUNUSED(evt))
 {
    StopPlaying();
 
@@ -664,7 +693,7 @@ void ControlToolBar::OnPlay(wxCommandEvent &evt)
    PlayDefault();
 }
 
-void ControlToolBar::OnStop(wxCommandEvent &evt)
+void ControlToolBar::OnStop(wxCommandEvent & WXUNUSED(evt))
 {
    StopPlaying();
 }
@@ -713,7 +742,7 @@ void ControlToolBar::StopPlaying(bool stopStream /* = true*/)
    }
 }
 
-void ControlToolBar::OnBatch(wxCommandEvent &evt)
+void ControlToolBar::OnBatch(wxCommandEvent & WXUNUSED(evt))
 {
    AudacityProject *proj = GetActiveProject();
    if (proj)
@@ -902,7 +931,7 @@ void ControlToolBar::OnRecord(wxCommandEvent &evt)
 }
 
 
-void ControlToolBar::OnPause(wxCommandEvent &evt)
+void ControlToolBar::OnPause(wxCommandEvent & WXUNUSED(evt))
 { 
    if(mPaused)
    {
@@ -918,7 +947,7 @@ void ControlToolBar::OnPause(wxCommandEvent &evt)
    gAudioIO->SetPaused(mPaused);
 }
 
-void ControlToolBar::OnRewind(wxCommandEvent &evt)
+void ControlToolBar::OnRewind(wxCommandEvent & WXUNUSED(evt))
 {
    mRewind->PushDown();
    mRewind->PopUp();
@@ -929,7 +958,7 @@ void ControlToolBar::OnRewind(wxCommandEvent &evt)
    }
 }
 
-void ControlToolBar::OnFF(wxCommandEvent &evt)
+void ControlToolBar::OnFF(wxCommandEvent & WXUNUSED(evt))
 {
    mFF->PushDown();
    mFF->PopUp();
@@ -941,8 +970,8 @@ void ControlToolBar::OnFF(wxCommandEvent &evt)
    }
 }
 
-void ControlToolBar::SetupCutPreviewTracks(double playStart, double cutStart,
-                                           double cutEnd, double playEnd)
+void ControlToolBar::SetupCutPreviewTracks(double WXUNUSED(playStart), double cutStart,
+                                           double cutEnd, double  WXUNUSED(playEnd))
 {
    ClearCutPreviewTracks();
    AudacityProject *p = GetActiveProject();
@@ -989,13 +1018,3 @@ void ControlToolBar::ClearCutPreviewTracks()
    }
 }
 
-// Indentation settings for Vim and Emacs and unique identifier for Arch, a
-// version control system. Please do not modify past this point.
-//
-// Local Variables:
-// c-basic-offset: 3
-// indent-tabs-mode: nil
-// End:
-//
-// vim: et sts=3 sw=3
-// arch-tag: ebfdc42a-6a03-4826-afa2-937a48c0565b

src/toolbars/ControlToolBar.h

@@ -81,6 +81,7 @@ class ControlToolBar:public ToolBar {
    void SetVUMeters(AudacityProject *p);
 
    virtual void ReCreateButtons();
+   void RegenerateToolsTooltips();
 
  private:
 
@@ -90,22 +91,21 @@ class ControlToolBar:public ToolBar {
       const wxChar *label);
    void MakeLoopImage();
    void ArrangeButtons();
-   void RegenerateToolsTooltips();
    void SetupCutPreviewTracks(double playStart, double cutStart,
                              double cutEnd, double playEnd);
    void ClearCutPreviewTracks();
 
    enum
    {
-      ID_PLAY_BUTTON,
+      ID_PLAY_BUTTON = 11000,
       ID_RECORD_BUTTON,
       ID_PAUSE_BUTTON,
       ID_STOP_BUTTON,
       ID_FF_BUTTON,
       ID_REW_BUTTON,
-      ID_BATCH_BUTTON,
 
-      BUTTON_COUNT
+      // ID_BATCH_BUTTON is not an actual button.
+      ID_BATCH_BUTTON, 
    };
 
    AButton *mRewind;
@@ -136,14 +136,3 @@ class ControlToolBar:public ToolBar {
 
 #endif
 
-// Indentation settings for Vim and Emacs and unique identifier for Arch, a
-// version control system. Please do not modify past this point.
-//
-// Local Variables:
-// c-basic-offset: 3
-// indent-tabs-mode: nil
-// End:
-//
-// vim: et sts=3 sw=3
-// arch-tag: bb2858b8-2c70-48df-9d72-bcdef94be4e3
-