Add option to display custom context menu in stc sample

This option could be useful to demonstrate ability to replace (override) standard Scintilla context menu with custom one. Switching between standard and custom popup menu is done with "Extra -> Custom popup menu" menu option.

samples/stc/defsext.h

@@ -76,6 +76,7 @@ enum {
     myID_MULTIPLE_SELECTIONS,
     myID_MULTI_PASTE,
     myID_MULTIPLE_SELECTIONS_TYPING,
+    myID_CUSTOM_POPUP,
     myID_USECHARSET,
     myID_CHARSETANSI,
     myID_CHARSETMAC,

samples/stc/edit.cpp

@@ -111,6 +111,7 @@ wxBEGIN_EVENT_TABLE (Edit, wxStyledTextCtrl)
     EVT_MENU(myID_MULTIPLE_SELECTIONS,          Edit::OnMultipleSelections)
     EVT_MENU(myID_MULTI_PASTE,                  Edit::OnMultiPaste)
     EVT_MENU(myID_MULTIPLE_SELECTIONS_TYPING,   Edit::OnMultipleSelectionsTyping)
+    EVT_MENU(myID_CUSTOM_POPUP,                 Edit::OnCustomPopup)
     // stc
     EVT_STC_MARGINCLICK (wxID_ANY,     Edit::OnMarginClick)
     EVT_STC_CHARADDED (wxID_ANY,       Edit::OnCharAdded)
@@ -175,7 +176,7 @@ Edit::Edit (wxWindow *parent, wxWindowID id,
     m_FoldingMargin = 16;
     CmdKeyClear (wxSTC_KEY_TAB, 0); // this is done by the menu accelerator key
     SetLayoutCache (wxSTC_CACHE_PAGE);
-
+    UsePopUp(wxSTC_POPUP_ALL);
 }
 
 Edit::~Edit () {}
@@ -453,6 +454,11 @@ void Edit::OnMultipleSelectionsTyping(wxCommandEvent& WXUNUSED(event)) {
     SetAdditionalSelectionTyping(!isSet);
 }
 
+void Edit::OnCustomPopup(wxCommandEvent& evt)
+{
+    UsePopUp(evt.IsChecked() ? wxSTC_POPUP_NEVER : wxSTC_POPUP_ALL);
+}
+
 //! misc
 void Edit::OnMarginClick (wxStyledTextEvent &event) {
     if (event.GetMargin() == 2) {

samples/stc/edit.h

@@ -101,6 +101,7 @@ public:
     void OnMultipleSelections(wxCommandEvent& event);
     void OnMultiPaste(wxCommandEvent& event);
     void OnMultipleSelectionsTyping(wxCommandEvent& event);
+    void OnCustomPopup(wxCommandEvent& evt);
     // stc
     void OnMarginClick (wxStyledTextEvent &event);
     void OnCharAdded  (wxStyledTextEvent &event);

samples/stc/stctest.cpp

@@ -146,6 +146,7 @@ public:
     void OnPrint (wxCommandEvent &event);
     //! edit events
     void OnEdit (wxCommandEvent &event);
+    void OnContextMenu(wxContextMenuEvent& evt);
 
 private:
     // edit object
@@ -276,6 +277,7 @@ wxBEGIN_EVENT_TABLE (AppFrame, wxFrame)
                                      AppFrame::OnEdit)
     // help
     EVT_MENU (wxID_ABOUT,            AppFrame::OnAbout)
+    EVT_CONTEXT_MENU(                AppFrame::OnContextMenu)
 wxEND_EVENT_TABLE ()
 
 AppFrame::AppFrame (const wxString &title)
@@ -438,6 +440,27 @@ void AppFrame::OnEdit (wxCommandEvent &event) {
     if (m_edit) m_edit->GetEventHandler()->ProcessEvent (event);
 }
 
+void AppFrame::OnContextMenu(wxContextMenuEvent& evt)
+{
+    wxPoint point = evt.GetPosition();
+    // If from keyboard
+    if ( point.x == -1 && point.y == -1 )
+    {
+        wxSize size = GetSize();
+        point.x = size.x / 2;
+        point.y = size.y / 2;
+    }
+    else
+    {
+        point = ScreenToClient(point);
+    }
+
+    wxMenu menu;
+    menu.Append(wxID_ABOUT, wxT("&About"));
+    menu.Append(wxID_EXIT, wxT("E&xit"));
+    PopupMenu(&menu, point);
+}
+
 // private functions
 void AppFrame::CreateMenu ()
 {
@@ -549,6 +572,8 @@ void AppFrame::CreateMenu ()
     menuExtra->AppendCheckItem(myID_MULTIPLE_SELECTIONS, _("Toggle &multiple selections"));
     menuExtra->AppendCheckItem(myID_MULTI_PASTE, _("Toggle multi-&paste"));
     menuExtra->AppendCheckItem(myID_MULTIPLE_SELECTIONS_TYPING, _("Toggle t&yping on multiple selections"));
+    menuExtra->AppendSeparator();
+    menuExtra->AppendCheckItem (myID_CUSTOM_POPUP, _("C&ustom popup menu"));
 
     // Window menu
     wxMenu *menuWindow = new wxMenu;