don't crash when trying to dump struct members which are NULL pointers

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

diff --git a/src/msw/bmpbuttn.cpp b/src/msw/bmpbuttn.cpp
index bb2e787838b13b544fb08bb526d9394355f44cb1..e1be21611f2270c55b891b3106919f67fcb30a17 100644 (file)
--- a/src/msw/bmpbuttn.cpp
+++ b/src/msw/bmpbuttn.cpp
@@ -29,6 +29,7 @@
 #endif
 
 #include "wx/msw/private.h"
+#include "wx/image.h"
 
 // ----------------------------------------------------------------------------
 // macros
@@ -47,7 +48,7 @@ wxBEGIN_FLAGS( wxBitmapButtonStyle )
     wxFLAGS_MEMBER(wxBORDER_RAISED)
     wxFLAGS_MEMBER(wxBORDER_STATIC)
     wxFLAGS_MEMBER(wxBORDER_NONE)
-    
+
     // old style border flags
     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
@@ -88,6 +89,10 @@ wxCONSTRUCTOR_5( wxBitmapButton , wxWindow* , Parent , wxWindowID , Id , wxBitma
 IMPLEMENT_DYNAMIC_CLASS(wxBitmapButton, wxButton)
 #endif
 
+BEGIN_EVENT_TABLE(wxBitmapButton, wxBitmapButtonBase)
+    EVT_SYS_COLOUR_CHANGED(wxBitmapButton::OnSysColourChanged)
+END_EVENT_TABLE()
+
 /*
 TODO PROPERTIES :
 
@@ -126,25 +131,11 @@ bool wxBitmapButton::Create(wxWindow *parent, wxWindowID id,
         m_marginY = wxDEFAULT_BUTTON_MARGIN;
     }
 
-    int x = pos.x;
-    int y = pos.y;
-    int width = size.x;
-    int height = size.y;
-
-    if (id == -1)
+    if (id == wxID_ANY)
         m_windowId = NewControlId();
     else
         m_windowId = id;
 
-    if ( bitmap.Ok() )
-    {
-        wxSize newSize = DoGetBestSize();
-        if ( width == -1 )
-            width = newSize.x;
-        if ( height == -1 )
-            height = newSize.y;
-    }
-
     long msStyle = WS_VISIBLE | WS_TABSTOP | WS_CHILD | BS_OWNERDRAW ;
 
     if ( m_windowStyle & wxCLIP_SIBLINGS )
@@ -176,13 +167,39 @@ bool wxBitmapButton::Create(wxWindow *parent, wxWindowID id,
     // Subclass again for purposes of dialog editing mode
     SubclassWin(m_hWnd);
 
-    SetFont(parent->GetFont());
+    SetPosition(pos);
+    SetBestSize(size);
+
+    return true;
+}
+
+bool wxBitmapButton::SetBackgroundColour(const wxColour& colour)
+{
+    if ( !wxBitmapButtonBase::SetBackgroundColour(colour) )
+    {
+        // didn't change
+        return false;
+    }
 
-    SetSize(x, y, width, height);
+    // invalidate the brush, it will be recreated the next time it's needed
+    m_brushDisabled = wxNullBrush;
 
     return true;
 }
 
+void wxBitmapButton::OnSysColourChanged(wxSysColourChangedEvent& event)
+{
+    m_brushDisabled = wxNullBrush;
+
+    if ( !IsEnabled() )
+    {
+        // this change affects our current state
+        Refresh();
+    }
+
+    event.Skip();
+}
+
 // VZ: should be at the very least less than wxDEFAULT_BUTTON_MARGIN
 #define FOCUS_MARGIN 3
 
@@ -430,11 +447,28 @@ void wxBitmapButton::DrawButtonFocus( WXHDC dc, int left, int top, int right,
     DrawFocusRect( (HDC) dc, &rect );
 }
 
-extern HBRUSH wxDisableButtonBrush;
-void wxBitmapButton::DrawButtonDisable( WXHDC dc, int left, int top, int right,
-    int bottom, bool with_marg )
+void
+wxBitmapButton::DrawButtonDisable( WXHDC dc,
+                                   int left, int top, int right, int bottom,
+                                   bool with_marg )
 {
-    HBRUSH  old = (HBRUSH) SelectObject( (HDC) dc, wxDisableButtonBrush );
+    if ( !m_brushDisabled.Ok() )
+    {
+        // draw a bitmap with two black and two background colour pixels
+        wxBitmap bmp(2, 2);
+        wxMemoryDC dc;
+        dc.SelectObject(bmp);
+        dc.SetPen(*wxBLACK_PEN);
+        dc.DrawPoint(0, 0);
+        dc.DrawPoint(1, 1);
+        dc.SetPen(GetBackgroundColour());
+        dc.DrawPoint(0, 1);
+        dc.DrawPoint(1, 0);
+
+        m_brushDisabled = wxBrush(bmp);
+    }
+
+    SelectInHDC selectBrush((HDC)dc, GetHbrushOf(m_brushDisabled));
 
     // ROP for "dest |= pattern" operation -- as it doesn't have a standard
     // name, give it our own
@@ -449,8 +483,6 @@ void wxBitmapButton::DrawButtonDisable( WXHDC dc, int left, int top, int right,
     }
 
     ::PatBlt( (HDC) dc, left, top, right, bottom, PATTERNPAINT);
-
-    ::SelectObject( (HDC) dc, old );
 }
 
 void wxBitmapButton::SetDefault()
@@ -460,26 +492,14 @@ void wxBitmapButton::SetDefault()
 
 wxSize wxBitmapButton::DoGetBestSize() const
 {
-    wxSize best;
-    if (m_bmpNormal.Ok())
-    {
-        best.x = m_bmpNormal.GetWidth() + 2*m_marginX;
-        best.y = m_bmpNormal.GetHeight() + 2*m_marginY;
-    }
-
-    // all buttons have at least the standard size unless the user explicitly
-    // wants them to be of smaller size and used wxBU_EXACTFIT style when
-    // creating the button
-    if ( !HasFlag(wxBU_EXACTFIT) )
+    if ( m_bmpNormal.Ok() )
     {
-        wxSize sz = GetDefaultSize();
-        if (best.x > sz.x)
-            sz.x = best.x;
-        if (best.y > sz.y)
-            sz.y = best.y;
+        return wxSize(m_bmpNormal.GetWidth() + 2*m_marginX,
+                      m_bmpNormal.GetHeight() + 2*m_marginY);
     }
 
-    return best;
+    // no idea what our best size should be, defer to the base class
+    return wxBitmapButtonBase::DoGetBestSize();
 }
 
 #endif // wxUSE_BMPBUTTON