another segfault fix

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

diff --git a/src/msw/settings.cpp b/src/msw/settings.cpp
index cd87ce1fb5040d62b40db3aa15ae702c14d474a0..7255aad9886d5b2d0b9b891e6b040ba85621f1f6 100644 (file)
--- a/src/msw/settings.cpp
+++ b/src/msw/settings.cpp
@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        settings.cpp
-// Purpose:     wxSettings
+// Name:        msw/settings.cpp
+// Purpose:     wxSystemSettings
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
@@ -9,8 +9,16 @@
 // Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
 #ifdef __GNUG__
-#pragma implementation "settings.h"
+    #pragma implementation "settings.h"
 #endif
 
 // For compilers that support precompilation, includes "wx.h".
@@ -21,16 +29,66 @@
 #endif
 
 #ifndef WX_PRECOMP
-#include <stdio.h>
-#include "wx/defs.h"
-#include "wx/pen.h"
-#include "wx/brush.h"
-#include "wx/gdicmn.h"
+    #include <stdio.h>
+    #include "wx/defs.h"
+    #include "wx/pen.h"
+    #include "wx/brush.h"
+    #include "wx/gdicmn.h"
 #endif
 
 #include "wx/settings.h"
 #include "wx/window.h"
 #include "wx/msw/private.h"
+#include "wx/module.h"
+#include "wx/fontutil.h"
+
+// ----------------------------------------------------------------------------
+// private classes
+// ----------------------------------------------------------------------------
+
+// the module which is used to clean up wxSystemSettings data (this is a
+// singleton class so it can't be done in the dtor)
+class wxSystemSettingsModule : public wxModule
+{
+    friend class wxSystemSettings;
+public:
+    virtual bool OnInit();
+    virtual void OnExit();
+
+private:
+    DECLARE_DYNAMIC_CLASS(wxSystemSettingsModule)
+};
+
+// ----------------------------------------------------------------------------
+// global data
+// ----------------------------------------------------------------------------
+
+static wxFont *gs_fontDefault = NULL;
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxSystemSettingsModule
+// ----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxSystemSettingsModule, wxModule)
+
+bool wxSystemSettingsModule::OnInit()
+{
+    return TRUE;
+}
+
+void wxSystemSettingsModule::OnExit()
+{
+    delete gs_fontDefault;
+    gs_fontDefault = NULL;
+}
+
+// ----------------------------------------------------------------------------
+// wxSystemSettings
+// ----------------------------------------------------------------------------
 
 // TODO: see ::SystemParametersInfo for all sorts of Windows settings.
 // Different args are required depending on the id. How does this differ
@@ -45,41 +103,75 @@ wxColour wxSystemSettings::GetSystemColour(int index)
     {
         case wxSYS_COLOUR_LISTBOX:
             return *wxWHITE;
-            break;
-    
+
         default:
             COLORREF ref = ::GetSysColor(index);
             wxColour col(GetRValue(ref), GetGValue(ref), GetBValue(ref));
             return col;
-                       break;
     }
 }
 
-wxFont wxSystemSettings::GetSystemFont(int index)
+wxFont wxCreateFontFromStockObject(int index)
 {
+    wxFont font;
+
     HFONT hFont = (HFONT) ::GetStockObject(index);
-    if ( hFont != (HFONT) NULL )
+    if ( hFont )
     {
         LOGFONT lf;
         if ( ::GetObject(hFont, sizeof(LOGFONT), &lf) != 0 )
         {
-            // In fontdlg.cpp
-            return wxCreateFontFromLogFont(&lf);
+            wxNativeFontInfo info;
+            info.lf = lf;
+            // Under MicroWindows we pass the HFONT as well
+            // because it's hard to convert HFONT -> LOGFONT -> HFONT
+            // It's OK to delete stock objects, the delete will be ignored.
+#ifdef __WXMICROWIN__
+            font.Create(info, (WXHFONT) hFont);
+#else
+            font.Create(info);
+#endif
         }
         else
         {
-            return wxNullFont;
+            wxFAIL_MSG( _T("failed to get LOGFONT") );
         }
     }
-    else
+    else // GetStockObject() failed
     {
-        return wxNullFont;
+        wxFAIL_MSG( _T("stock font not found") );
     }
+    return font;
+}
+
+wxFont wxSystemSettings::GetSystemFont(int index)
+{
+    // wxWindow ctor calls GetSystemFont(wxSYS_DEFAULT_GUI_FONT) so we're
+    // called fairly often - this is why we cache this particular font
+    bool isDefaultRequested = index == wxSYS_DEFAULT_GUI_FONT;
+    if ( isDefaultRequested && gs_fontDefault )
+    {
+        return *gs_fontDefault;
+    }
+
+    wxFont font = wxCreateFontFromStockObject(index);
+
+    if ( isDefaultRequested )
+    {
+        // if we got here it means we hadn't cached it yet - do now
+        gs_fontDefault = new wxFont(font);
+    }
+
+    return font;
 }
 
 // Get a system metric, e.g. scrollbar size
 int wxSystemSettings::GetSystemMetric(int index)
 {
+#ifdef __WXMICROWIN__
+    // TODO: probably use wxUniv themes functionality
+    return 0;
+#else
     switch ( index)
     {
 #ifdef __WIN32__
@@ -171,6 +263,18 @@ int wxSystemSettings::GetSystemMetric(int index)
         default:
             return 0;
     }
-    return 0;
+#endif
+    // __WXMICROWIN__
 }
 
+bool wxSystemSettings::GetCapability(int index)
+{
+    switch (index)
+    {
+        case wxSYS_CAN_ICONIZE_FRAME: 
+        case wxSYS_CAN_DRAW_FRAME_DECORATIONS:
+            return TRUE;
+        default:
+            return FALSE;
+    }
+}