Skeleton for generic Drag code

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

diff --git a/include/wx/msw/dc.h b/include/wx/msw/dc.h
index ac1f0a3989c83de77a6ad34db168061d754a5afb..908e24bcff8fbf8d3ad5b029968d9f92b16c3eab 100644 (file)
--- a/include/wx/msw/dc.h
+++ b/include/wx/msw/dc.h
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        dc.h
+// Name:        wx/msw/dc.h

 // Purpose:     wxDC class
 // Author:      Julian Smart
 // Modified by:
 // Purpose:     wxDC class
 // Author:      Julian Smart
 // Modified by:


@@ -9,12 +9,8 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

-#ifndef _WX_DC_H_
-#define _WX_DC_H_
-
-#ifdef __GNUG__
-    #pragma interface "dc.h"
-#endif
+#ifndef _WX_MSW_DC_H_
+#define _WX_MSW_DC_H_

 
 #include "wx/defs.h"
 #include "wx/dc.h"
 
 #include "wx/defs.h"
 #include "wx/dc.h"


@@ -35,7 +31,7 @@ class wxDCCacheEntry: public wxObject
 public:
     wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth);
     wxDCCacheEntry(WXHDC hDC, int depth);
 public:
     wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth);
     wxDCCacheEntry(WXHDC hDC, int depth);

-    ~wxDCCacheEntry();
+    virtual ~wxDCCacheEntry();

 
     WXHBITMAP   m_bitmap;
     WXHDC       m_dc;
 
     WXHBITMAP   m_bitmap;
     WXHDC       m_dc;


@@ -45,11 +41,13 @@ public:
 };
 #endif
 
 };
 #endif
 

-class WXDLLEXPORT wxDC : public wxDCBase
+// this is an ABC: use one of the derived classes to create a DC associated
+// with a window, screen, printer and so on
+class WXDLLIMPEXP_CORE wxMSWDCImpl: public wxDCImpl

 {
 public:
 {
 public:

-    wxDC();
-    ~wxDC();
+    wxMSWDCImpl(wxDC *owner, WXHDC hDC);
+    virtual ~wxMSWDCImpl();

 
     // implement base class pure virtuals
     // ----------------------------------
 
     // implement base class pure virtuals
     // ----------------------------------


@@ -75,25 +73,21 @@ public:
 
     virtual wxCoord GetCharHeight() const;
     virtual wxCoord GetCharWidth() const;
 
     virtual wxCoord GetCharHeight() const;
     virtual wxCoord GetCharWidth() const;

-    virtual void DoGetTextExtent(const wxString& string,
-                                 wxCoord *x, wxCoord *y,
-                                 wxCoord *descent = NULL,
-                                 wxCoord *externalLeading = NULL,
-                                 wxFont *theFont = NULL) const;

 
     virtual bool CanDrawBitmap() const;
     virtual bool CanGetTextExtent() const;
     virtual int GetDepth() const;
     virtual wxSize GetPPI() const;
 
 
     virtual bool CanDrawBitmap() const;
     virtual bool CanGetTextExtent() const;
     virtual int GetDepth() const;
     virtual wxSize GetPPI() const;
 

-    virtual void SetMapMode(int mode);
+
+    virtual void SetMapMode(wxMappingMode mode);

     virtual void SetUserScale(double x, double y);
     virtual void SetUserScale(double x, double y);

-    virtual void SetSystemScale(double x, double y);

     virtual void SetLogicalScale(double x, double y);
     virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
     virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
     virtual void SetLogicalScale(double x, double y);
     virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
     virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);

-    virtual void SetLogicalFunction(int function);
+
+    virtual void SetLogicalFunction(wxRasterOperationMode function);

 
     // implementation from now on
     // --------------------------
 
     // implementation from now on
     // --------------------------


@@ -101,10 +95,9 @@ public:
     virtual void SetRop(WXHDC cdc);
     virtual void SelectOldObjects(WXHDC dc);
 
     virtual void SetRop(WXHDC cdc);
     virtual void SelectOldObjects(WXHDC dc);
 

-    wxWindow *GetWindow() const { return m_canvas; }

     void SetWindow(wxWindow *win)
     {
     void SetWindow(wxWindow *win)
     {

-        m_canvas = win;
+        m_window = win;

 
 #if wxUSE_PALETTE
         // if we have palettes use the correct one for this window
 
 #if wxUSE_PALETTE
         // if we have palettes use the correct one for this window


@@ -113,10 +106,17 @@ public:
     }
 
     WXHDC GetHDC() const { return m_hDC; }
     }
 
     WXHDC GetHDC() const { return m_hDC; }

-    void SetHDC(WXHDC dc, bool bOwnsDC = FALSE)
+    void SetHDC(WXHDC dc, bool bOwnsDC = false)

     {
         m_hDC = dc;
         m_bOwnsDC = bOwnsDC;
     {
         m_hDC = dc;
         m_bOwnsDC = bOwnsDC;

+
+        // we might have a pre existing clipping region, make sure that we
+        // return it if asked -- but avoid calling ::GetClipBox() right now as
+        // it could be unnecessary wasteful
+        m_clipping = true;
+        m_clipX1 =
+        m_clipX2 = 0;

     }
 
     const wxBitmap& GetSelectedBitmap() const { return m_selectedBitmap; }
     }
 
     const wxBitmap& GetSelectedBitmap() const { return m_selectedBitmap; }


@@ -134,9 +134,51 @@ public:
     static void ClearCache();
 #endif
 
     static void ClearCache();
 #endif
 

+    // RTL related functions
+    // ---------------------
+
+    // get or change the layout direction (LTR or RTL) for this dc,
+    // wxLayout_Default is returned if layout direction is not supported
+    virtual wxLayoutDirection GetLayoutDirection() const;
+    virtual void SetLayoutDirection(wxLayoutDirection dir);
+

 protected:
 protected:

+    void Init()
+    {
+        m_bOwnsDC = false;
+        m_hDC = NULL;
+
+        m_oldBitmap = NULL;
+        m_oldPen = NULL;
+        m_oldBrush = NULL;
+        m_oldFont = NULL;
+
+#if wxUSE_PALETTE
+        m_oldPalette = NULL;
+#endif // wxUSE_PALETTE
+    }
+
+    // create an uninitialized DC: this should be only used by the derived
+    // classes
+    wxMSWDCImpl( wxDC *owner ) : wxDCImpl( owner ) { Init(); }
+
+    void RealizeScaleAndOrigin();
+
+public:
+    virtual void DoGetTextExtent(const wxString& string,
+                                 wxCoord *x, wxCoord *y,
+                                 wxCoord *descent = NULL,
+                                 wxCoord *externalLeading = NULL,
+                                 const wxFont *theFont = NULL) const;
+    virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const;
+

     virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
     virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,

-                             int style = wxFLOOD_SURFACE);
+                             wxFloodFillStyle style = wxFLOOD_SURFACE);
+
+    virtual void DoGradientFillLinear(const wxRect& rect,
+                                      const wxColour& initialColour,
+                                      const wxColour& destColour,
+                                      wxDirection nDirection = wxEAST);

 
     virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const;
 
 
     virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const;
 


@@ -157,11 +199,15 @@ protected:
                                         double radius);
     virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 
                                         double radius);
     virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 

+#if wxUSE_SPLINES && !defined(__WXWINCE__)
+    virtual void DoDrawSpline(const wxPointList *points);
+#endif
+

     virtual void DoCrossHair(wxCoord x, wxCoord y);
 
     virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y);
     virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
     virtual void DoCrossHair(wxCoord x, wxCoord y);
 
     virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y);
     virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,

-                              bool useMask = FALSE);
+                              bool useMask = false);

 
     virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y);
     virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
 
     virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y);
     virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,


@@ -169,27 +215,38 @@ protected:
 
     virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
                         wxDC *source, wxCoord xsrc, wxCoord ysrc,
 
     virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
                         wxDC *source, wxCoord xsrc, wxCoord ysrc,

-                        int rop = wxCOPY, bool useMask = FALSE, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1);
+                        wxRasterOperationMode rop = wxCOPY, bool useMask = false, 
+                        wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord);
+
+    virtual bool DoStretchBlit(wxCoord xdest, wxCoord ydest,
+                               wxCoord dstWidth, wxCoord dstHeight,
+                               wxDC *source,
+                               wxCoord xsrc, wxCoord ysrc,
+                               wxCoord srcWidth, wxCoord srcHeight,
+                               wxRasterOperationMode rop = wxCOPY, bool useMask = false,
+                               wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord);

 
 

-    // this is gnarly - we can't even call this function DoSetClippingRegion()
-    // because of virtual function hiding
-    virtual void DoSetClippingRegionAsRegion(const wxRegion& region);

     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
                                      wxCoord width, wxCoord height);
     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
                                      wxCoord width, wxCoord height);

-    virtual void DoGetClippingRegion(wxCoord *x, wxCoord *y,
-                                     wxCoord *width, wxCoord *height)
-    {
-        GetClippingBox(x, y, width, height);
-    }
+    virtual void DoSetDeviceClippingRegion(const wxRegion& region);
+    virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
+                                  wxCoord *w, wxCoord *h) const;

 
 

-    virtual void DoGetSize(int *width, int *height) const;

     virtual void DoGetSizeMM(int* width, int* height) const;
 
     virtual void DoDrawLines(int n, wxPoint points[],
                              wxCoord xoffset, wxCoord yoffset);
     virtual void DoDrawPolygon(int n, wxPoint points[],
                                wxCoord xoffset, wxCoord yoffset,
     virtual void DoGetSizeMM(int* width, int* height) const;
 
     virtual void DoDrawLines(int n, wxPoint points[],
                              wxCoord xoffset, wxCoord yoffset);
     virtual void DoDrawPolygon(int n, wxPoint points[],
                                wxCoord xoffset, wxCoord yoffset,

-                               int fillStyle = wxODDEVEN_RULE);
+                               wxPolygonFillMode fillStyle = wxODDEVEN_RULE);
+    virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
+                                   wxCoord xoffset, wxCoord yoffset,
+                                   wxPolygonFillMode fillStyle = wxODDEVEN_RULE);
+    virtual wxBitmap DoGetAsBitmap(const wxRect *subrect) const
+    {
+        return subrect == NULL ? GetSelectedBitmap()
+                               : GetSelectedBitmap().GetSubBitmap(*subrect);
+    }

 
 
 #if wxUSE_PALETTE
 
 
 #if wxUSE_PALETTE


@@ -197,18 +254,30 @@ protected:
     // (tell windows to translate pixel from other palettes to our custom one
     // and vice versa)
     // Realize tells it to also reset the system palette to this one.
     // (tell windows to translate pixel from other palettes to our custom one
     // and vice versa)
     // Realize tells it to also reset the system palette to this one.

-    void DoSelectPalette(bool realize = FALSE);
+    void DoSelectPalette(bool realize = false);

 
     // Find out what palette our parent window has, then select it into the dc
     void InitializePalette();
 #endif // wxUSE_PALETTE
 
 
     // Find out what palette our parent window has, then select it into the dc
     void InitializePalette();
 #endif // wxUSE_PALETTE
 

+protected:

     // common part of DoDrawText() and DoDrawRotatedText()
     void DrawAnyText(const wxString& text, wxCoord x, wxCoord y);
 
     // common part of DoDrawText() and DoDrawRotatedText()
     void DrawAnyText(const wxString& text, wxCoord x, wxCoord y);
 

-    // common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
+    // common part of DoSetClippingRegion() and DoSetDeviceClippingRegion()

     void SetClippingHrgn(WXHRGN hrgn);
 
     void SetClippingHrgn(WXHRGN hrgn);
 

+    // implementation of DoGetSize() for wxScreen/PrinterDC: this simply
+    // returns the size of the entire device this DC is associated with
+    //
+    // notice that we intentionally put it in a separate function instead of
+    // DoGetSize() itself because we want it to remain pure virtual both
+    // because each derived class should take care to define it as needed (this
+    // implementation is not at all always appropriate) and because we want
+    // wxDC to be an ABC to prevent it from being created directly
+    void GetDeviceSize(int *width, int *height) const;
+
+

     // MSW-specific member variables
     // -----------------------------
 
     // MSW-specific member variables
     // -----------------------------
 


@@ -236,25 +305,63 @@ protected:
 #endif // wxUSE_PALETTE
 
 #if wxUSE_DC_CACHEING
 #endif // wxUSE_PALETTE
 
 #if wxUSE_DC_CACHEING

-    static wxList     sm_bitmapCache;
-    static wxList     sm_dcCache;
+    static wxObjectList     sm_bitmapCache;
+    static wxObjectList     sm_dcCache;

 #endif
 
 #endif
 

-    DECLARE_DYNAMIC_CLASS(wxDC)
-    DECLARE_NO_COPY_CLASS(wxDC)
+    DECLARE_CLASS(wxMSWDCImpl)
+    DECLARE_NO_COPY_CLASS(wxMSWDCImpl)

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------

-// wxDCTemp: a wxDC which doesn't free the given HDC (used by wxWindows
+// wxDCTemp: a wxDC which doesn't free the given HDC (used by wxWidgets

 // only/mainly)
 // ----------------------------------------------------------------------------
 
 // only/mainly)
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxDCTemp : public wxDC
+class WXDLLIMPEXP_CORE wxDCTempImpl : public wxMSWDCImpl
+{
+public:
+    // construct a temporary DC with the specified HDC and size (it should be
+    // specified whenever we know it for this HDC)
+    wxDCTempImpl(wxDC *owner, WXHDC hdc, const wxSize& size )
+        : wxMSWDCImpl( owner, hdc ),
+          m_size(size)
+    {
+    }
+
+    virtual ~wxDCTempImpl()
+    {
+        // prevent base class dtor from freeing it
+        SetHDC((WXHDC)NULL);
+    }
+
+    virtual void DoGetSize(int *w, int *h) const
+    {
+        wxASSERT_MSG( m_size.IsFullySpecified(),
+                      _T("size of this DC hadn't been set and is unknown") );
+
+        if ( w )
+            *w = m_size.x;
+        if ( h )
+            *h = m_size.y;
+    }
+
+private:
+    // size of this DC must be explicitly set by SetSize() as we have no way to
+    // find it ourselves
+    const wxSize m_size;
+
+    DECLARE_NO_COPY_CLASS(wxDCTempImpl)
+};
+
+class WXDLLIMPEXP_CORE wxDCTemp : public wxDC

 {
 public:
 {
 public:

-    wxDCTemp(WXHDC hdc) { SetHDC(hdc); }
-    virtual ~wxDCTemp() { SetHDC((WXHDC)NULL); }
+    wxDCTemp(WXHDC hdc, const wxSize& size = wxDefaultSize)
+        : wxDC(new wxDCTempImpl(this, hdc, size))
+    {
+    }

 };
 
 };
 

-#endif
-    // _WX_DC_H_
+#endif // _WX_MSW_DC_H_
+