some wxArtProv docs

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

diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index f4aeebe02b04bc93e42b8494708019cc977e86dd..09d21ad3d03a48040fd1e786f42e600422756cdc 100644 (file)
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -137,7 +137,8 @@ private:
 
 wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc)
 {
-    if ( dc.GetBrush().GetStyle() == wxSTIPPLE_MASK_OPAQUE )
+    const wxBrush& brush = dc.GetBrush();
+    if ( brush.Ok() && brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
     {
         HDC hdc = GetHdcOf(dc);
         m_colFgOld = ::GetTextColor(hdc);
@@ -939,7 +940,7 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
             wxPalette *pal = bmp.GetPalette();
             if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 )
             {
-                oldPal = ::SelectPalette(hdcMem, GetHpaletteOf(pal), FALSE);
+                oldPal = ::SelectPalette(hdcMem, GetHpaletteOf(*pal), FALSE);
                 ::RealizePalette(hdcMem);
             }
 #endif // wxUSE_PALETTE
@@ -994,7 +995,7 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
         wxPalette *pal = bmp.GetPalette();
         if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 )
         {
-            oldPal = ::SelectPalette(memdc, GetHpaletteOf(pal), FALSE);
+            oldPal = ::SelectPalette(memdc, GetHpaletteOf(*pal), FALSE);
             ::RealizePalette(memdc);
         }
 #endif // wxUSE_PALETTE
@@ -1142,7 +1143,7 @@ void wxDC::DoDrawRotatedText(const wxString& text,
 
 #if wxUSE_PALETTE
 
-void wxDC::SetPalette(const wxPalette& palette)
+void wxDC::DoSelectPalette(bool realize)
 {
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
@@ -1156,28 +1157,44 @@ void wxDC::SetPalette(const wxPalette& palette)
         m_oldPalette = 0;
     }
 
-    m_palette = palette;
-
-    if (!m_palette.Ok())
+    if ( m_palette.Ok() )
     {
-        // Setting a NULL colourmap is a way of restoring
-        // the original colourmap
-        if (m_oldPalette)
-        {
-            ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, FALSE);
-            m_oldPalette = 0;
-        }
+        HPALETTE oldPal = ::SelectPalette(GetHdc(),
+                                          GetHpaletteOf(m_palette),
+                                          FALSE);
+        if (!m_oldPalette)
+            m_oldPalette = (WXHPALETTE) oldPal;
 
-        return;
+        if (realize)
+            ::RealizePalette(GetHdc());
     }
+}
 
-    if (m_palette.Ok() && m_palette.GetHPALETTE())
+void wxDC::SetPalette(const wxPalette& palette)
+{
+    if ( palette.Ok() )
     {
-        HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), FALSE);
-        if (!m_oldPalette)
-            m_oldPalette = (WXHPALETTE) oldPal;
+        m_palette = palette;
+        DoSelectPalette(TRUE);
+    }
+}
 
-        ::RealizePalette(GetHdc());
+void wxDC::InitializePalette()
+{
+    if ( wxDisplayDepth() <= 8 )
+    {
+        // look for any window or parent that has a custom palette. If any has
+        // one then we need to use it in drawing operations
+        wxWindow *win = m_canvas->GetAncestorWithCustomPalette();
+
+        m_hasCustomPalette = win && win->HasCustomPalette();
+        if ( m_hasCustomPalette )
+        {
+            m_palette = win->GetPalette();
+
+            // turn on MSW translation for this palette
+            DoSelectPalette();
+        }
     }
 }
 
@@ -1906,8 +1923,30 @@ void wxDC::DoGetSizeMM(int *w, int *h) const
     if (!GetHDC()) return;
 #endif
 
-    if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
-    if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
+    // if we implement it in terms of DoGetSize() instead of directly using the
+    // results returned by GetDeviceCaps(HORZ/VERTSIZE) as was done before, it
+    // will also work for wxWindowDC and wxClientDC even though their size is
+    // not the same as the total size of the screen
+    int wPixels, hPixels;
+    DoGetSize(&wPixels, &hPixels);
+
+    if ( w )
+    {
+        int wTotal = ::GetDeviceCaps(GetHdc(), HORZRES);
+
+        wxCHECK_RET( wTotal, _T("0 width device?") );
+
+        *w = (wPixels * ::GetDeviceCaps(GetHdc(), HORZSIZE)) / wTotal;
+    }
+
+    if ( h )
+    {
+        int hTotal = ::GetDeviceCaps(GetHdc(), VERTRES);
+
+        wxCHECK_RET( hTotal, _T("0 height device?") );
+
+        *h = (hPixels * ::GetDeviceCaps(GetHdc(), VERTSIZE)) / hTotal;
+    }
 }
 
 wxSize wxDC::GetPPI() const