Ensure there is valid context for DrawRectangle

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

diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index 34e2e2bb4f0114923f6567b3bd6a60b15e57e946..65dd568e9cd5cb8016b691cb6d3f9a312c878012 100644 (file)
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -81,6 +81,7 @@
 #include "wx/msw/private.h"
 #include "wx/msw/private/keyboard.h"
 #include "wx/msw/dcclient.h"
+#include "wx/private/textmeasure.h"
 
 #if wxUSE_TOOLTIPS
     #include "wx/tooltip.h"
@@ -1429,7 +1430,7 @@ WXDWORD wxWindowMSW::MSWGetStyle(long flags, WXDWORD *exstyle) const
     // it doesn't seem useful to use WS_CLIPSIBLINGS here as we officially
     // don't support overlapping windows and it only makes sense for them and,
     // presumably, gives the system some extra work (to manage more clipping
-    // regions), so avoid it alltogether
+    // regions), so avoid it altogether
 
 
     if ( flags & wxVSCROLL )
@@ -2164,31 +2165,18 @@ void wxWindowMSW::DoGetTextExtent(const wxString& string,
                                   int *externalLeading,
                                   const wxFont *fontToUse) const
 {
-    wxASSERT_MSG( !fontToUse || fontToUse->IsOk(),
-                    wxT("invalid font in GetTextExtent()") );
-
-    HFONT hfontToUse;
-    if ( fontToUse )
-        hfontToUse = GetHfontOf(*fontToUse);
+    // ensure we work with a valid font
+    wxFont font;
+    if ( !fontToUse || !fontToUse->IsOk() )
+        font = GetFont();
     else
-        hfontToUse = GetHfontOf(GetFont());
+        font = *fontToUse;
 
-    WindowHDC hdc(GetHwnd());
-    SelectInHDC selectFont(hdc, hfontToUse);
+    wxCHECK_RET( font.IsOk(), wxT("invalid font in GetTextExtent()") );
 
-    SIZE sizeRect;
-    TEXTMETRIC tm;
-    ::GetTextExtentPoint32(hdc, string.t_str(), string.length(), &sizeRect);
-    GetTextMetrics(hdc, &tm);
-
-    if ( x )
-        *x = sizeRect.cx;
-    if ( y )
-        *y = sizeRect.cy;
-    if ( descent )
-        *descent = tm.tmDescent;
-    if ( externalLeading )
-        *externalLeading = tm.tmExternalLeading;
+    const wxWindow* win = static_cast<const wxWindow*>(this);
+    wxTextMeasure txm(win, &font);
+    txm.GetTextExtent(string, x, y, descent, externalLeading);
 }
 
 // ---------------------------------------------------------------------------
@@ -4828,6 +4816,8 @@ bool wxWindowMSW::HandlePaint()
     // be called from inside the event handlers called above)
     m_updateRegion.Clear();
 
+    wxPaintDCImpl::EndPaint((wxWindow *)this);
+
     return processed;
 }
 
@@ -4969,7 +4959,11 @@ wxWindowMSW::MSWGetBgBrushForChild(WXHDC hDC, wxWindowMSW *child)
 
         ::MapWindowPoints(NULL, GetHwnd(), (POINT *)&rc, 1);
 
-        if ( !::SetBrushOrgEx((HDC)hDC, -rc.left, -rc.top, NULL) )
+        int x = rc.left,
+            y = rc.top;
+        MSWAdjustBrushOrg(&x, &y);
+
+        if ( !::SetBrushOrgEx((HDC)hDC, -x, -y, NULL) )
         {
             wxLogLastError(wxT("SetBrushOrgEx(bg brush)"));
         }
@@ -5461,7 +5455,7 @@ bool wxWindowMSW::HandleMouseEvent(WXUINT msg, int x, int y, WXUINT flags)
     };
 
 #ifdef wxHAS_XBUTTON
-    // the same messages are used for both auxillary mouse buttons so we need
+    // the same messages are used for both auxiliary mouse buttons so we need
     // to adjust the index manually
     switch ( msg )
     {
@@ -5682,21 +5676,6 @@ MSWInitAnyKeyEvent(wxKeyEvent& event,
 #ifndef __WXWINCE__
     event.SetTimestamp(::GetMessageTime());
 #endif
-
-    // Event coordinates must be in window client coordinates system which
-    // doesn't make sense if there is no window.
-    //
-    // We could use screen coordinates for such events but this would make the
-    // logic of the event handlers more complicated: you'd need to test for the
-    // event object and interpret the coordinates differently according to
-    // whether it's NULL or not so unless somebody really asks for this let's
-    // just avoid the issue.
-    if ( win )
-    {
-        const wxPoint mousePos = win->ScreenToClient(wxGetMousePosition());
-        event.m_x = mousePos.x;
-        event.m_y = mousePos.y;
-    }
 }
 
 } // anonymous namespace
@@ -6330,6 +6309,9 @@ int VKToWX(WXWORD vk, WXLPARAM lParam, wchar_t *uc)
 
         case VK_DELETE:
             wxk = ChooseNormalOrExtended(lParam, WXK_NUMPAD_DELETE, WXK_DELETE);
+
+            if ( uc )
+                *uc = WXK_DELETE;
             break;
 
         case VK_RETURN:
@@ -6624,7 +6606,7 @@ wxKeyboardHook(int nCode, WORD wParam, DWORD lParam)
     DWORD hiWord = HIWORD(lParam);
     if ( nCode != HC_NOREMOVE && ((hiWord & KF_UP) == 0) )
     {
-        wchar_t uc;
+        wchar_t uc = 0;
         int id = wxMSWKeyboard::VKToWX(wParam, lParam, &uc);
 
         // Don't intercept keyboard entry (notably Escape) if a modal window
@@ -7230,9 +7212,21 @@ wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
     {
         // WindowFromPoint() ignores the disabled children but we're supposed
         // to take them into account, so check if we have a child at this
-        // coordinate.
-        ::ScreenToClient(hWnd, &pt2);
-        hWnd = ::ChildWindowFromPointEx(hWnd, pt2, CWP_SKIPINVISIBLE);
+        // coordinate using ChildWindowFromPointEx().
+        for ( ;; )
+        {
+            pt2.x = pt.x;
+            pt2.y = pt.y;
+            ::ScreenToClient(hWnd, &pt2);
+            HWND child = ::ChildWindowFromPointEx(hWnd, pt2, CWP_SKIPINVISIBLE);
+            if ( child == hWnd || !child )
+                break;
+
+            // ChildWindowFromPointEx() only examines the immediate children
+            // but we want to get the deepest (top in Z-order) one, so continue
+            // iterating for as long as it finds anything.
+            hWnd = child;
+        }
     }
 
     return wxGetWindowFromHWND((WXHWND)hWnd);