merged wxFont related fix (operator==) and optimization (cache default GUI font)

from 2.2


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9827 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/settings.h

@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        settings.h
+// Name:        wx/msw/settings.h
 // Purpose:     wxSystemSettings class
 // Author:      Julian Smart
 // Modified by:
@@ -16,14 +16,13 @@
 #pragma interface "settings.h"
 #endif
 
-#include "wx/setup.h"
 #include "wx/colour.h"
 #include "wx/font.h"
 
 class WXDLLEXPORT wxSystemSettings : public wxObject
 {
 public:
-    inline wxSystemSettings(void) {}
+    wxSystemSettings() { }
 
     // Get a system colour
     static wxColour GetSystemColour(int index);

include/wx/tbarbase.h

@@ -411,7 +411,7 @@ public:
     virtual void DoToolbarUpdates();
 
     // Don't want toolbars to accept the focus
-    bool AcceptsFocus() const { return FALSE; }
+    virtual bool AcceptsFocus() const { return FALSE; }
 
 protected:
     // to implement in derived classes

src/common/fontcmn.cpp

@@ -128,15 +128,25 @@ wxFont& wxFont::operator=(const wxFont& font)
     return (wxFont &)*this;
 }
 
-// VZ: is it correct to compare pointers and not the contents? (FIXME)
 bool wxFontBase::operator==(const wxFont& font) const
 {
-    return GetFontData() == font.GetFontData();
+    // either it is the same font, i.e. they share the same common data or they
+    // have different ref datas but still describe the same font
+    return GetFontData() == font.GetFontData() ||
+           (
+            Ok() == font.Ok() &&
+            GetPointSize() == font.GetPointSize() &&
+            GetFamily() == font.GetFamily() &&
+            GetStyle() == font.GetStyle() &&
+            GetUnderlined() == font.GetUnderlined() &&
+            GetFaceName() == font.GetFaceName() &&
+            GetEncoding() == font.GetEncoding()
+           );
 }
 
 bool wxFontBase::operator!=(const wxFont& font) const
 {
-    return GetFontData() != font.GetFontData();
+    return !(*this == font);
 }
 
 wxString wxFontBase::GetFamilyString() const

src/common/wincmn.cpp

@@ -130,8 +130,12 @@ void wxWindowBase::InitBase()
     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_BTNFACE);
     m_foregroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOWTEXT);
 
-    // GRG, changed Mar/2000
+    // don't set the font here for wxMSW as we don't call WM_SETFONT here and
+    // so the font is *not* really set - but calls to SetFont() later won't do
+    // anything because m_font appears to be already set!
+#ifndef __WXMSW__
     m_font = wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT);
+#endif // __WXMSW__
 
     // no style bits
     m_exStyle =
@@ -642,7 +646,7 @@ bool wxWindowBase::SetFont(const wxFont& font)
     // don't try to set invalid font, always fall back to the default
     const wxFont& fontOk = font.Ok() ? font : *wxSWISS_FONT;
 
-    if ( (wxFont&)fontOk == m_font )
+    if ( fontOk == m_font )
     {
         // no change
         return FALSE;

src/generic/panelg.cpp

@@ -74,15 +74,7 @@ bool wxPanel::Create(wxWindow *parent, wxWindowID id,
                      long style,
                      const wxString& name)
 {
-    bool ret = wxWindow::Create(parent, id, pos, size, style, name);
-
-    if ( ret )
-    {
-        SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
-        SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
-    }
-
-    return ret;
+    return wxWindow::Create(parent, id, pos, size, style, name);
 }
 
 // ----------------------------------------------------------------------------

src/msw/dc.cpp

@@ -1213,22 +1213,35 @@ wxCoord wxDC::GetCharWidth() const
 
 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
                            wxCoord *descent, wxCoord *externalLeading,
-                           wxFont *theFont) const
+                           wxFont *font) const
 {
-    wxFont *fontToUse = (wxFont*) theFont;
-    if (!fontToUse)
-        fontToUse = (wxFont*) &m_font;
+    HFONT hfontOld;
+    if ( font )
+    {
+        wxASSERT_MSG( font->Ok(), _T("invalid font in wxDC::GetTextExtent") );
+
+        hfontOld = (HFONT)::SelectObject(GetHdc(), GetHfontOf(*font));
+    }
+    else // don't change the font
+    {
+        hfontOld = 0;
+    }
 
     SIZE sizeRect;
     TEXTMETRIC tm;
 
-    GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
+    GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
     GetTextMetrics(GetHdc(), &tm);
 
     if (x) *x = XDEV2LOGREL(sizeRect.cx);
     if (y) *y = YDEV2LOGREL(sizeRect.cy);
     if (descent) *descent = tm.tmDescent;
     if (externalLeading) *externalLeading = tm.tmExternalLeading;
+
+    if ( hfontOld )
+    {
+        ::SelectObject(GetHdc(), hfontOld);
+    }
 }
 
 void wxDC::SetMapMode(int mode)

src/msw/dialog.cpp

@@ -188,7 +188,6 @@ bool wxDialog::Create(wxWindow *parent,
     SubclassWin(GetHWND());
 
     SetWindowText(hwnd, title);
-    SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
 
     return TRUE;
 }

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
@@ -9,6 +9,14 @@
 // Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
 #ifdef __GNUG__
     #pragma implementation "settings.h"
 #endif
@@ -32,6 +40,52 @@
 #include "wx/window.h"
 #include "wx/msw/private.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
+{
+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;
+}
+
+// ----------------------------------------------------------------------------
+// wxSystemSettings
+// ----------------------------------------------------------------------------
+
 // TODO: see ::SystemParametersInfo for all sorts of Windows settings.
 // Different args are required depending on the id. How does this differ
 // from GetSystemMetric, and should it? Perhaps call it GetSystemParameter
@@ -55,24 +109,41 @@ wxColour wxSystemSettings::GetSystemColour(int index)
 
 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;
+
     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);
+            font = wxCreateFontFromLogFont(&lf);
         }
         else
         {
-            return wxNullFont;
+            wxFAIL_MSG( _T("failed to get LOGFONT") );
         }
     }
-    else
+    else // GetStockObject() failed
     {
-        return wxNullFont;
+        wxFAIL_MSG( _T("stock font not found") );
     }
+
+    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

src/msw/window.cpp

@@ -342,12 +342,10 @@ bool wxWindow::Create(wxWindow *parent, wxWindowID id,
                      DLGC_WANTTAB | DLGC_WANTMESSAGE;
     }
 
-    MSWCreate(m_windowId, parent, wxCanvasClassName, this, NULL,
+    return MSWCreate(m_windowId, parent, wxCanvasClassName, this, NULL,
                      pos.x, pos.y,
                      WidthDefault(size.x), HeightDefault(size.y),
                      msflags, NULL, exStyle);
-
-    return TRUE;
 }
 
 // ---------------------------------------------------------------------------
@@ -2512,6 +2510,8 @@ bool wxWindow::MSWCreate(int id,
 
     wxAssociateWinWithHandle((HWND) m_hWnd, this);
 
+    SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
+
     return TRUE;
 }