Implement EVT_MOUSE_CAPTURE_LOST handler in wxSTC

When mouse is captured somwhere in the application, it's recommended
to have implemented a EVT_MOUSE_CAPTURE_LOST handler.
Resetting in the handler flag signalling captured state seems
to be a sufficient action because something like this is implemented
in the native Scintilla and it works fine in SciTE.

Closes #17961.

include/wx/stc/stc.h

@@ -5439,6 +5439,7 @@ protected:
     void OnMenu(wxCommandEvent& evt);
     void OnListBox(wxCommandEvent& evt);
     void OnIdle(wxIdleEvent& evt);
+    void OnMouseCaptureLost(wxMouseCaptureLostEvent& evt);
 
     virtual wxSize DoGetBestSize() const wxOVERRIDE;
 

src/stc/ScintillaWX.cpp

@@ -1180,6 +1180,12 @@ void ScintillaWX::DoOnListBox() {
 }
 
 
+void ScintillaWX::DoMouseCaptureLost()
+{
+    capturedMouse = false;
+}
+
+
 void ScintillaWX::DoOnIdle(wxIdleEvent& evt) {
 
     if ( Idle() )

src/stc/ScintillaWX.h

@@ -183,6 +183,7 @@ public:
     void DoCommand(int ID);
     bool DoContextMenu(Point pt);
     void DoOnListBox();
+    void DoMouseCaptureLost();
 
 
     // helpers

src/stc/stc.cpp

@@ -162,6 +162,7 @@ wxBEGIN_EVENT_TABLE(wxStyledTextCtrl, wxControl)
     EVT_ERASE_BACKGROUND        (wxStyledTextCtrl::OnEraseBackground)
     EVT_MENU_RANGE              (10, 16, wxStyledTextCtrl::OnMenu)
     EVT_LISTBOX_DCLICK          (wxID_ANY, wxStyledTextCtrl::OnListBox)
+    EVT_MOUSE_CAPTURE_LOST      (wxStyledTextCtrl::OnMouseCaptureLost)
 wxEND_EVENT_TABLE()
 
 
@@ -5369,6 +5370,11 @@ void wxStyledTextCtrl::OnIdle(wxIdleEvent& evt) {
 }
 
 
+void wxStyledTextCtrl::OnMouseCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(evt)) {
+    m_swx->DoMouseCaptureLost();
+}
+
+
 wxSize wxStyledTextCtrl::DoGetBestSize() const
 {
     // What would be the best size for a wxSTC?

src/stc/stc.cpp.in

@@ -162,6 +162,7 @@ wxBEGIN_EVENT_TABLE(wxStyledTextCtrl, wxControl)
     EVT_ERASE_BACKGROUND        (wxStyledTextCtrl::OnEraseBackground)
     EVT_MENU_RANGE              (10, 16, wxStyledTextCtrl::OnMenu)
     EVT_LISTBOX_DCLICK          (wxID_ANY, wxStyledTextCtrl::OnListBox)
+    EVT_MOUSE_CAPTURE_LOST      (wxStyledTextCtrl::OnMouseCaptureLost)
 wxEND_EVENT_TABLE()
 
 
@@ -884,6 +885,11 @@ void wxStyledTextCtrl::OnIdle(wxIdleEvent& evt) {
 }
 
 
+void wxStyledTextCtrl::OnMouseCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(evt)) {
+    m_swx->DoMouseCaptureLost();
+}
+
+
 wxSize wxStyledTextCtrl::DoGetBestSize() const
 {
     // What would be the best size for a wxSTC?

src/stc/stc.h.in

@@ -562,6 +562,7 @@ protected:
     void OnMenu(wxCommandEvent& evt);
     void OnListBox(wxCommandEvent& evt);
     void OnIdle(wxIdleEvent& evt);
+    void OnMouseCaptureLost(wxMouseCaptureLostEvent& evt);
 
     virtual wxSize DoGetBestSize() const wxOVERRIDE;