Add Help buttons to three Dialogs.

- Added to Edit and Apply Chains dialogs.
- Added to Select Command dialog.

src/BatchCommandDialog.cpp

@@ -41,6 +41,7 @@ selected command.
 #include "effects/EffectManager.h"
 #include "BatchCommands.h"
 #include "ShuttleGui.h"
+#include "widgets/HelpSystem.h"
 
 
 #define CommandsListID        7001
@@ -50,6 +51,7 @@ selected command.
 BEGIN_EVENT_TABLE(BatchCommandDialog, wxDialogWrapper)
    EVT_BUTTON(wxID_OK,                     BatchCommandDialog::OnOk)
    EVT_BUTTON(wxID_CANCEL,                 BatchCommandDialog::OnCancel)
+   EVT_BUTTON(wxID_HELP,                   BatchCommandDialog::OnHelp)
    EVT_BUTTON(EditParamsButtonID,          BatchCommandDialog::OnEditParams)
    EVT_BUTTON(UsePresetButtonID,           BatchCommandDialog::OnUsePreset)
    EVT_LIST_ITEM_ACTIVATED(CommandsListID, BatchCommandDialog::OnItemSelected)
@@ -110,7 +112,7 @@ void BatchCommandDialog::PopulateOrExchange(ShuttleGui &S)
    }
    S.EndVerticalLay();
 
-   S.AddStandardButtons();
+   S.AddStandardButtons( eOkButton | eCancelButton | eHelpButton);
 
    PopulateCommandList();
 
@@ -149,6 +151,12 @@ void BatchCommandDialog::OnCancel(wxCommandEvent & WXUNUSED(event))
    EndModal(false);
 }
 
+void BatchCommandDialog::OnHelp(wxCommandEvent & WXUNUSED(event))
+{
+   wxString page = GetHelpPageName();
+   HelpSystem::ShowHelp(this, page, true);
+}
+
 void BatchCommandDialog::OnItemSelected(wxListEvent &event)
 {
    const auto &command = mCommandNames[ event.GetIndex() ];

src/BatchCommandDialog.h

@@ -53,7 +53,9 @@ class BatchCommandDialog final : public wxDialogWrapper {
    void OnChoice(wxCommandEvent &event);
    void OnOk(wxCommandEvent &event);
    void OnCancel(wxCommandEvent &event);
+   void OnHelp(wxCommandEvent &event);
    void OnItemSelected(wxListEvent &event);
+   wxString GetHelpPageName() { return wxT("Scripting Reference") ; }
 
    void ValidateChoices();
    void PopulateCommandList();

src/BatchProcessDialog.cpp

@@ -53,6 +53,7 @@
 #include "FileNames.h"
 #include "import/Import.h"
 #include "widgets/ErrorDialog.h"
+#include "widgets/HelpSystem.h"
 
 #define ChainsListID       7001
 #define CommandsListID     7002
@@ -63,6 +64,7 @@ BEGIN_EVENT_TABLE(BatchProcessDialog, wxDialogWrapper)
    EVT_BUTTON(ApplyToProjectID, BatchProcessDialog::OnApplyToProject)
    EVT_BUTTON(ApplyToFilesID, BatchProcessDialog::OnApplyToFiles)
    EVT_BUTTON(wxID_CANCEL, BatchProcessDialog::OnCancel)
+   EVT_BUTTON(wxID_HELP, BatchProcessDialog::OnHelp)
 END_EVENT_TABLE()
 
 BatchProcessDialog::BatchProcessDialog(wxWindow * parent, bool bInherited):
@@ -115,7 +117,8 @@ void BatchProcessDialog::PopulateOrExchange(ShuttleGui &S)
          S.Id(ApplyToProjectID).AddButton(_("&Project"));
          S.Id(ApplyToFilesID).AddButton(_("&Files..."));
          S.AddSpace( 40 );
-         S.Id(wxID_CANCEL).AddButton(_("&Cancel"));
+         //S.Id(wxID_CANCEL).AddButton(_("&Cancel"));
+         S.AddStandardButtons( eCancelButton | eHelpButton);
       }
       S.EndHorizontalLay();
    }
@@ -148,6 +151,12 @@ void BatchProcessDialog::PopulateOrExchange(ShuttleGui &S)
    mChains->SetColumnWidth(0, sz.x);
 }
 
+void BatchProcessDialog::OnHelp(wxCommandEvent & WXUNUSED(event))
+{
+   wxString page = GetHelpPageName();
+   HelpSystem::ShowHelp(this, page, true);
+}
+
 void BatchProcessDialog::OnApplyToProject(wxCommandEvent & WXUNUSED(event))
 {
    long item = mChains->GetNextItem(-1,
@@ -600,7 +609,7 @@ void EditChainsDialog::PopulateOrExchange(ShuttleGui & S)
             S.Id(ApplyToProjectButtonID).AddButton(_("&Project"), wxALIGN_LEFT);
             S.Id(ApplyToFilesButtonID).AddButton(_("&Files..."), wxALIGN_LEFT);
             S.AddSpace( 40 );
-            S.AddStandardButtons();
+            S.AddStandardButtons( eOkButton | eCancelButton | eHelpButton);
          }
          S.EndHorizontalLay();
       }

src/BatchProcessDialog.h

@@ -50,6 +50,10 @@ class BatchProcessDialog : public wxDialogWrapper {
    virtual void OnApplyToProject(wxCommandEvent & event);
    virtual void OnApplyToFiles(wxCommandEvent & event);
    virtual void OnCancel(wxCommandEvent & event);
+   virtual void OnHelp(wxCommandEvent & event);
+
+   virtual wxString GetHelpPageName() {return "Tools_Menu#chains_compact_dialog";};
+
 
    // These will be reused in the derived class...
    wxListCtrl *mList;
@@ -77,6 +81,7 @@ private:
    void OnApplyToFiles(wxCommandEvent & event) override;
    void OnCancel(wxCommandEvent &event) override;
 
+   virtual wxString GetHelpPageName() override {return "Tools_Menu#chains_full_dialog";};
 
    void PopulateChains();
    void PopulateList();