Some improvements to accessibility behaviour

[wxWidgets.git] / src / msw / caret.cpp

diff --git a/src/msw/caret.cpp b/src/msw/caret.cpp
index dec7d89ea568023cd88b6e4ac392dab008962f07..ee761165a116c557f584ee47b56964c92a115f7d 100644 (file)
--- a/src/msw/caret.cpp
+++ b/src/msw/caret.cpp
@@ -37,6 +37,20 @@
 
 #include "wx/msw/private.h"
 
+// ---------------------------------------------------------------------------
+// macros
+// ---------------------------------------------------------------------------
+
+// under Win16 the caret APIs are void but under Win32 they may return an
+// error code which we want to check - this macro does just this
+#ifdef __WIN16__
+    #define CALL_CARET_API(api, args)   api args
+#else // Win32
+    #define CALL_CARET_API(api, args)   \
+        if ( !api args )                \
+            wxLogLastError(_T(#api))
+#endif // Win16/32
+
 // ===========================================================================
 // implementation
 // ===========================================================================
@@ -51,7 +65,7 @@ int wxCaretBase::GetBlinkTime()
     int blinkTime = ::GetCaretBlinkTime();
     if ( !blinkTime )
     {
-        wxLogLastError("GetCaretBlinkTime");
+        wxLogLastError(wxT("GetCaretBlinkTime"));
     }
 
     return blinkTime;
@@ -60,14 +74,7 @@ int wxCaretBase::GetBlinkTime()
 //static
 void wxCaretBase::SetBlinkTime(int milliseconds)
 {
-#ifdef __WIN16__
-    ::SetCaretBlinkTime(milliseconds) ;
-#else
-    if ( !::SetCaretBlinkTime(milliseconds) )
-    {
-        wxLogLastError("SetCaretBlinkTime");
-    }
-#endif
+    CALL_CARET_API(SetCaretBlinkTime, (milliseconds));
 }
 
 // ---------------------------------------------------------------------------
@@ -76,24 +83,15 @@ void wxCaretBase::SetBlinkTime(int milliseconds)
 
 bool wxCaret::MSWCreateCaret()
 {
-    wxASSERT_MSG( GetWindow(), _T("caret without window cannot be created") );
-    wxASSERT_MSG( IsOk(),  _T("caret of zero size cannot be created") );
+    wxASSERT_MSG( GetWindow(), wxT("caret without window cannot be created") );
+    wxASSERT_MSG( IsOk(),  wxT("caret of zero size cannot be created") );
 
     if ( !m_hasCaret )
     {
-#ifdef __WIN16__
-        ::CreateCaret(GetWinHwnd(GetWindow()), 0, m_width, m_height) ;
+        CALL_CARET_API(CreateCaret, (GetWinHwnd(GetWindow()), 0,
+                                     m_width, m_height));
+
         m_hasCaret = TRUE;
-#else
-        if ( !::CreateCaret(GetWinHwnd(GetWindow()), 0, m_width, m_height) )
-        {
-            wxLogLastError("CreateCaret");
-        }
-        else
-        {
-            m_hasCaret = TRUE;
-        }
-#endif
     }
 
     return m_hasCaret;
@@ -121,14 +119,7 @@ void wxCaret::OnKillFocus()
     {
         m_hasCaret = FALSE;
 
-#ifdef __WIN16__
-        ::DestroyCaret() ;
-#else
-        if ( !::DestroyCaret() )
-        {
-            wxLogLastError("DestroyCaret");
-        }
-#endif
+        CALL_CARET_API(DestroyCaret, ());
     }
 }
 
@@ -138,36 +129,32 @@ void wxCaret::OnKillFocus()
 
 void wxCaret::DoShow()
 {
-    wxASSERT_MSG( GetWindow(), _T("caret without window cannot be shown") );
-    wxASSERT_MSG( IsOk(), _T("caret of zero size cannot be shown") );
+    wxASSERT_MSG( GetWindow(), wxT("caret without window cannot be shown") );
+    wxASSERT_MSG( IsOk(), wxT("caret of zero size cannot be shown") );
 
-    if ( !m_hasCaret )
+    // we might not have created the caret yet if we had got the focus first
+    // and the caret was shown later - so do it now if we have the focus but
+    // not the caret
+    if ( !m_hasCaret && (wxWindow::FindFocus() == GetWindow()) )
     {
-        (void)MSWCreateCaret();
+        if ( MSWCreateCaret() )
+        {
+            DoMove();
+        }
     }
 
-#ifdef __WIN16__
-    ::ShowCaret(GetWinHwnd(GetWindow())) ;
-#else
-    if ( !::ShowCaret(GetWinHwnd(GetWindow())) )
+    if ( m_hasCaret )
     {
-        wxLogLastError("ShowCaret");
+        CALL_CARET_API(ShowCaret, (GetWinHwnd(GetWindow())));
     }
-#endif
+    //else: will be shown when we get the focus
 }
 
 void wxCaret::DoHide()
 {
     if ( m_hasCaret )
     {
-#ifdef __WIN16__
-        ::HideCaret(GetWinHwnd(GetWindow())) ;
-#else
-        if ( !::HideCaret(GetWinHwnd(GetWindow())) )
-        {
-            wxLogLastError("HideCaret");
-        }
-#endif
+        CALL_CARET_API(HideCaret, (GetWinHwnd(GetWindow())));
     }
 }
 
@@ -179,14 +166,29 @@ void wxCaret::DoMove()
 {
     if ( m_hasCaret )
     {
-#ifdef __WIN16__
-        ::SetCaretPos(m_x, m_y) ;
-#else
-        if ( !::SetCaretPos(m_x, m_y) )
-        {
-            wxLogLastError("SetCaretPos");
-        }
-#endif
+        wxASSERT_MSG( wxWindow::FindFocus() == GetWindow(),
+                      wxT("how did we lose focus?") );
+
+        // for compatibility with the generic version, the coordinates are
+        // client ones
+        wxPoint pt = GetWindow()->GetClientAreaOrigin();
+        CALL_CARET_API(SetCaretPos, (m_x + pt.x, m_y + pt.y));
     }
     //else: we don't have caret right now, nothing to do (this does happen)
 }
+
+
+// ---------------------------------------------------------------------------
+// resizing the caret
+// ---------------------------------------------------------------------------
+
+void wxCaret::DoSize()
+{
+    if ( m_hasCaret )
+    {
+        m_hasCaret = FALSE;
+        CALL_CARET_API(DestroyCaret, ());
+        MSWCreateCaret();
+        OnSetFocus();
+    }
+}