allow passing -1 range to SetScrollbar() to indicate the the scrollbar should be...

[wxWidgets.git] / include / wx / dc.h

diff --git a/include/wx/dc.h b/include/wx/dc.h
index 9c8974f8ae5a0e0d87febed09ed98b8bf0abd5d5..ab19b30997693a161011a70679a0cbcca8febefb 100644 (file)
--- a/include/wx/dc.h
+++ b/include/wx/dc.h
@@ -1,7 +1,7 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        wx/dc.h
 // Purpose:     wxDC class
-// Author:      Vadim Zeitlin 
+// Author:      Vadim Zeitlin
 // Modified by:
 // Created:     05/25/99
 // RCS-ID:      $Id$
@@ -163,7 +163,7 @@ class WXDLLIMPEXP_CORE wxDCImpl: public wxObject
 {
 public:
     wxDCImpl( wxDC *owner );
-    ~wxDCImpl();
+    virtual ~wxDCImpl();
 
     wxDC *GetOwner() const { return m_owner; }
 
@@ -255,32 +255,41 @@ public:
     // setters and getters
 
     virtual void SetFont(const wxFont& font) = 0;
-    virtual const wxFont&   GetFont() const { return m_font; }
+    virtual const wxFont& GetFont() const { return m_font; }
 
     virtual void SetPen(const wxPen& pen) = 0;
-    virtual const wxPen&    GetPen() const { return m_pen; }
+    virtual const wxPen& GetPen() const { return m_pen; }
 
     virtual void SetBrush(const wxBrush& brush) = 0;
-    virtual const wxBrush&  GetBrush() const { return m_brush; }
+    virtual const wxBrush& GetBrush() const { return m_brush; }
 
     virtual void SetBackground(const wxBrush& brush) = 0;
-    virtual const wxBrush&  GetBackground() const { return m_backgroundBrush; }
+    virtual const wxBrush& GetBackground() const { return m_backgroundBrush; }
 
     virtual void SetBackgroundMode(int mode) = 0;
     virtual int GetBackgroundMode() const { return m_backgroundMode; }
 
     virtual void SetTextForeground(const wxColour& colour)
         { m_textForegroundColour = colour; }
-    virtual const wxColour& GetTextForeground() const { return m_textForegroundColour; }
+    virtual const wxColour& GetTextForeground() const
+        { return m_textForegroundColour; }
 
     virtual void SetTextBackground(const wxColour& colour)
         { m_textBackgroundColour = colour; }
-    virtual const wxColour& GetTextBackground() const { return m_textBackgroundColour; }
+    virtual const wxColour& GetTextBackground() const
+        { return m_textBackgroundColour; }
 
 #if wxUSE_PALETTE
     virtual void SetPalette(const wxPalette& palette) = 0;
 #endif // wxUSE_PALETTE
 
+    // inherit the DC attributes (font and colours) from the given window
+    //
+    // this is called automatically when a window, client or paint DC is
+    // created
+    virtual void InheritAttributes(wxWindow *win);
+
+
     // logical functions
 
     virtual void SetLogicalFunction(int function) = 0;
@@ -488,10 +497,10 @@ public:
     // ---------------------------------------------------------
     // wxPrinterDC Impl API
 
-    virtual wxRect GetPaperRect()
+    virtual wxRect GetPaperRect() const
         { int w = 0; int h = 0; DoGetSize( &w, &h ); return wxRect(0,0,w,h); }
 
-    virtual int GetResolution()
+    virtual int GetResolution() const
         { return -1; }
 
 private:
@@ -553,6 +562,10 @@ protected:
                                   double sa, double ea );
 #endif // __WXWINCE__
 
+    // returns adjustment factor for converting wxFont "point size"; in wx
+    // it is point size on screen and needs to be multiplied by this value
+    // for rendering on higher-resolution DCs such as printer ones
+    static float GetFontPointSizeAdjustment(float dpi);
 
     // window on which the DC draws or NULL
     wxWindow   *m_window;
@@ -654,7 +667,7 @@ public:
     wxSize GetPPI() const
         { return m_pimpl->GetPPI(); }
 
-    virtual int GetResolution()
+    virtual int GetResolution() const
         { return m_pimpl->GetResolution(); }
 
     // Right-To-Left (RTL) modes
@@ -1108,8 +1121,12 @@ public:
     wxDEPRECATED( void GetLogicalOrigin(long *x, long *y) const );
     wxDEPRECATED( void GetDeviceOrigin(long *x, long *y) const );
     wxDEPRECATED( void GetClippingBox(long *x, long *y, long *w, long *h) const );
+
 #endif  // WXWIN_COMPATIBILITY_2_8
 
+#ifdef __WXMSW__
+    WXHDC GetHDC() const;
+#endif // __WXMSW__
 
 protected:
     // ctor takes ownership of the pointer
@@ -1235,4 +1252,32 @@ private:
     DECLARE_NO_COPY_CLASS(wxDCClipper)
 };
 
+// ----------------------------------------------------------------------------
+// helper class: you can use it to temporarily change the DC font and
+// restore it automatically when the object goes out of scope
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_CORE wxDCFontChanger
+{
+public:
+    wxDCFontChanger(wxDC& dc, const wxFont& font) : m_dc(dc), m_fontOld(dc.GetFont())
+    {
+        m_dc.SetFont(font);
+    }
+
+    ~wxDCFontChanger()
+    {
+        if ( m_fontOld.Ok() )
+            m_dc.SetFont(m_fontOld);
+    }
+
+private:
+    wxDC& m_dc;
+
+    wxFont m_fontOld;
+
+    DECLARE_NO_COPY_CLASS(wxDCFontChanger)
+};
+
+
 #endif // _WX_DC_H_BASE_