private.h

Wxpython Implemented on Windows CE, Source code

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/msw/private.h
// Purpose:     Private declarations: as this header is only included by
//              wxWidgets itself, it may contain identifiers which don't start
//              with "wx".
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id: private.h,v 1.152 2006/03/09 13:18:46 VZ Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_PRIVATE_H_
#define _WX_PRIVATE_H_

#include "wx/msw/wrapwin.h"

#ifdef __WXMICROWIN__
    // Extra prototypes and symbols not defined by MicroWindows
    #include "wx/msw/microwin.h"
#endif

// Include fixes for MSLU:
#include "wx/msw/mslu.h"

#include "wx/log.h"

class WXDLLEXPORT wxFont;
class WXDLLEXPORT wxWindow;
class WXDLLEXPORT wxWindowBase;

// ---------------------------------------------------------------------------
// private constants
// ---------------------------------------------------------------------------

// 260 was taken from windef.h
#ifndef MAX_PATH
    #define MAX_PATH  260
#endif

// ---------------------------------------------------------------------------
// standard icons from the resources
// ---------------------------------------------------------------------------

#if wxUSE_GUI

extern WXDLLEXPORT_DATA(HICON) wxSTD_FRAME_ICON;
extern WXDLLEXPORT_DATA(HICON) wxSTD_MDIPARENTFRAME_ICON;
extern WXDLLEXPORT_DATA(HICON) wxSTD_MDICHILDFRAME_ICON;
extern WXDLLEXPORT_DATA(HICON) wxDEFAULT_FRAME_ICON;
extern WXDLLEXPORT_DATA(HICON) wxDEFAULT_MDIPARENTFRAME_ICON;
extern WXDLLEXPORT_DATA(HICON) wxDEFAULT_MDICHILDFRAME_ICON;
extern WXDLLEXPORT_DATA(HFONT) wxSTATUS_LINE_FONT;

#endif // wxUSE_GUI

// ---------------------------------------------------------------------------
// global data
// ---------------------------------------------------------------------------

extern WXDLLIMPEXP_DATA_BASE(HINSTANCE) wxhInstance;

// ---------------------------------------------------------------------------
// define things missing from some compilers' headers
// ---------------------------------------------------------------------------

#if defined(__WXWINCE__) || (defined(__GNUWIN32__) && !wxUSE_NORLANDER_HEADERS)
#ifndef ZeroMemory
    inline void ZeroMemory(void *buf, size_t len) { memset(buf, 0, len); }
#endif
#endif // old mingw32

// this defines a CASTWNDPROC macro which casts a pointer to the type of a
// window proc
#if defined(STRICT) || defined(__GNUC__)
    typedef WNDPROC WndProcCast;
#else
    typedef FARPROC WndProcCast;
#endif


#define CASTWNDPROC (WndProcCast)



// ---------------------------------------------------------------------------
// some stuff for old Windows versions (FIXME: what does it do here??)
// ---------------------------------------------------------------------------

#if !defined(APIENTRY)  // NT defines APIENTRY, 3.x not
    #define APIENTRY FAR PASCAL
#endif

#ifdef __WIN32__
    #define _EXPORT
#else
    #define _EXPORT _export
#endif

#ifndef __WIN32__
    typedef signed short int SHORT;
#endif

#if !defined(__WIN32__)  // 3.x uses FARPROC for dialogs
#ifndef STRICT
    #define DLGPROC FARPROC
#endif
#endif

/*
 * Decide what window classes we're going to use
 * for this combination of CTl3D/FAFA settings
 */

#define STATIC_CLASS     wxT("STATIC")
#define STATIC_FLAGS     (SS_LEFT|WS_CHILD|WS_VISIBLE)
#define CHECK_CLASS      wxT("BUTTON")
#define CHECK_FLAGS      (BS_AUTOCHECKBOX|WS_TABSTOP|WS_CHILD)
#define CHECK_IS_FAFA    FALSE
#define RADIO_CLASS      wxT("BUTTON")
#define RADIO_FLAGS      (BS_AUTORADIOBUTTON|WS_CHILD|WS_VISIBLE)
#define RADIO_SIZE       20
#define RADIO_IS_FAFA    FALSE
#define PURE_WINDOWS
#define GROUP_CLASS      wxT("BUTTON")
#define GROUP_FLAGS      (BS_GROUPBOX|WS_CHILD|WS_VISIBLE)

/*
#define BITCHECK_FLAGS   (FB_BITMAP|FC_BUTTONDRAW|FC_DEFAULT|WS_VISIBLE)
#define BITRADIO_FLAGS   (FC_BUTTONDRAW|FB_BITMAP|FC_RADIO|WS_CHILD|WS_VISIBLE)
*/

// ---------------------------------------------------------------------------
// misc macros
// ---------------------------------------------------------------------------

#define MEANING_CHARACTER '0'
#define DEFAULT_ITEM_WIDTH  100
#define DEFAULT_ITEM_HEIGHT 80

// Scale font to get edit control height
//#define EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)    (3*(cy)/2)
#define EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)    (cy+8)

// Generic subclass proc, for panel item moving/sizing and intercept
// EDIT control VK_RETURN messages
extern LONG APIENTRY _EXPORT
  wxSubclassedGenericControlProc(WXHWND hWnd, WXUINT message, WXWPARAM wParam, WXLPARAM lParam);

// ---------------------------------------------------------------------------
// useful macros and functions
// ---------------------------------------------------------------------------

// a wrapper macro for ZeroMemory()
#if defined(__WIN32__) && !defined(__WXMICROWIN__)
#define wxZeroMemory(obj)   ::ZeroMemory(&obj, sizeof(obj))
#else
#define wxZeroMemory(obj)   memset((void*) & obj, 0, sizeof(obj))
#endif

// This one is a macro so that it can be tested with #ifdef, it will be
// undefined if it cannot be implemented for a given compiler.
// Vc++, bcc, dmc, ow, mingw, codewarrior (and rsxnt) have _get_osfhandle.
// Cygwin has get_osfhandle. Others are currently unknown, e.g. Salford,
// Intel, Visual Age.
#if defined(__WXWINCE__)
    #define wxGetOSFHandle(fd) ((HANDLE)fd)
#elif defined(__CYGWIN__)
    #define wxGetOSFHandle(fd) ((HANDLE)get_osfhandle(fd))
#elif defined(__VISUALC__) \
   || defined(__BORLANDC__) \
   || defined(__DMC__) \
   || defined(__WATCOMC__) \
   || defined(__MINGW32__) \
   || (defined(__MWERKS__) && defined(__MSL__))
    #define wxGetOSFHandle(fd) ((HANDLE)_get_osfhandle(fd))
#endif

// close the handle in the class dtor
class AutoHANDLE
{
public:
    wxEXPLICIT AutoHANDLE(HANDLE handle) : m_handle(handle) { }

    bool IsOk() const { return m_handle != INVALID_HANDLE_VALUE; }
    operator HANDLE() const { return m_handle; }

    ~AutoHANDLE() { if ( IsOk() ) ::CloseHandle(m_handle); }

protected:
    HANDLE m_handle;
};

// a template to make initializing Windows styructs less painful: it zeroes all
// the struct fields and also sets cbSize member to the correct value (and so
// can be only used with structures which have this member...)
template <class T>
struct WinStruct : public T
{
    WinStruct()
    {
        ::ZeroMemory(this, sizeof(T));

        // explicit qualification is required here for this to be valid C++
        this->cbSize = sizeof(T);
    }
};


#if wxUSE_GUI

#include "wx/gdicmn.h"
#include "wx/colour.h"

// make conversion from wxColour and COLORREF a bit less painful
inline COLORREF wxColourToRGB(const wxColour& c)
{
    return RGB(c.Red(), c.Green(), c.Blue());
}

inline COLORREF wxColourToPalRGB(const wxColour& c)
{
    return PALETTERGB(c.Red(), c.Green(), c.Blue());
}

inline wxColour wxRGBToColour(COLORREF rgb)
{
    return wxColour(GetRValue(rgb), GetGValue(rgb), GetBValue(rgb));
}

inline void wxRGBToColour(wxColour& c, COLORREF rgb)
{
    c.Set(GetRValue(rgb), GetGValue(rgb), GetBValue(rgb));
}

// get the standard colour map for some standard colours - see comment in this
// function to understand why is it needed and when should it be used
//
// it returns a wxCOLORMAP (can't use COLORMAP itself here as comctl32.dll
// might be not included/available) array of size wxSTD_COLOUR_MAX
//
// NB: if you change these colours, update wxBITMAP_STD_COLOURS in the
//     resources as well: it must have the same number of pixels!
enum wxSTD_COLOUR
{
    wxSTD_COL_BTNTEXT,
    wxSTD_COL_BTNSHADOW,
    wxSTD_COL_BTNFACE,
    wxSTD_COL_BTNHIGHLIGHT,
    wxSTD_COL_MAX
};

struct WXDLLEXPORT wxCOLORMAP
{
    COLORREF from, to;
};

// this function is implemented in src/msw/window.cpp
extern wxCOLORMAP *wxGetStdColourMap();

// create a wxRect from Windows RECT
inline wxRect wxRectFromRECT(const RECT& rc)
{
    return wxRect(rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top);
}

// copy Windows RECT to our wxRect
inline void wxCopyRECTToRect(const RECT& rc, wxRect& rect)
{
    rect = wxRectFromRECT(rc);
}

// and vice versa
inline void wxCopyRectToRECT(const wxRect& rect, RECT& rc)
{
    // note that we don't use wxRect::GetRight() as it is one of compared to
    // wxRectFromRECT() above
    rc.top = rect.y;
    rc.left = rect.x;
    rc.right = rect.x + rect.width;
    rc.bottom = rect.y + rect.height;
}

// translations between HIMETRIC units (which OLE likes) and pixels (which are
// liked by all the others) - implemented in msw/utilsexc.cpp
extern void HIMETRICToPixel(LONG *x, LONG *y);
extern void PixelToHIMETRIC(LONG *x, LONG *y);

// Windows convention of the mask is opposed to the wxWidgets one, so we need
// to invert the mask each time we pass one/get one to/from Windows
extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w = 0, int h = 0);

// Creates an icon or cursor depending from a bitmap
//
// The bitmap must be valid and it should have a mask. If it doesn't, a default
// mask is created using light grey as the transparent colour.
extern HICON wxBitmapToHICON(const wxBitmap& bmp);

// Same requirments as above apply and the bitmap must also have the correct
// size.
extern
HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY);

// get (x, y) from DWORD - notice that HI/LOWORD can *not* be used because they
// will fail on system with multiple monitors where the coords may be negative
//
// these macros are standard now (Win98) but some older headers don't have them
#ifndef GET_X_LPARAM
    #define GET_X_LPARAM(lp) ((int)(short)LOWORD(lp))
    #define GET_Y_LPARAM(lp) ((int)(short)HIWORD(lp))
#endif // GET_X_LPARAM

// get the current state of SHIFT/CTRL keys
inline bool wxIsShiftDown()
{
//    return (::GetKeyState(VK_SHIFT) & 0x100) != 0;
    // Returns different negative values on WinME and WinNT,
    // so simply test for negative value.
    return ::GetKeyState(VK_SHIFT) < 0;
}

inline bool wxIsCtrlDown()
{
//    return (::GetKeyState(VK_CONTROL) & 0x100) != 0;
    // Returns different negative values on WinME and WinNT,
    // so simply test for negative value.
    return ::GetKeyState(VK_CONTROL) < 0;
}

// wrapper around GetWindowRect() and GetClientRect() APIs doing error checking
// for Win32
inline RECT wxGetWindowRect(HWND hwnd)
{
    RECT rect;

    if ( !::GetWindowRect(hwnd, &rect) )
    {
        wxLogLastError(_T("GetWindowRect"));
    }

    return rect;
}

inline RECT wxGetClientRect(HWND hwnd)
{
    RECT rect;

    if ( !::GetClientRect(hwnd, &rect) )
    {
        wxLogLastError(_T("GetClientRect"));
    }

    return rect;
}

// ---------------------------------------------------------------------------
// small helper classes
// ---------------------------------------------------------------------------

// create an instance of this class and use it as the HDC for screen, will
// automatically release the DC going out of scope
class ScreenHDC
{
public:
    ScreenHDC() { m_hdc = ::GetDC(NULL);    }
   ~ScreenHDC() { ::ReleaseDC(NULL, m_hdc); }

    operator HDC() const { return m_hdc; }

private:
    HDC m_hdc;

    DECLARE_NO_COPY_CLASS(ScreenHDC)
};

// the same as ScreenHDC but for window DCs
class WindowHDC
{
public:
    WindowHDC(HWND hwnd) { m_hdc = ::GetDC(m_hwnd = hwnd); }
   ~WindowHDC() { ::ReleaseDC(m_hwnd, m_hdc); }

    operator HDC() const { return m_hdc; }

private:
   HWND m_hwnd;
   HDC m_hdc;

   DECLARE_NO_COPY_CLASS(WindowHDC)
};

// the same as ScreenHDC but for memory DCs: creates the HDC compatible with
// the given one (screen by default) in ctor and destroys it in dtor
class MemoryHDC
{
public:
    MemoryHDC(HDC hdc = 0) { m_hdc = ::CreateCompatibleDC(hdc); }
   ~MemoryHDC() { ::DeleteDC(m_hdc); }

    operator HDC() const { return m_hdc; }

private:
    HDC m_hdc;

    DECLARE_NO_COPY_CLASS(MemoryHDC)
};

// a class which selects a GDI object into a DC in its ctor and deselects in
// dtor
class SelectInHDC
{
public:
    SelectInHDC(HDC hdc, HGDIOBJ hgdiobj) : m_hdc(hdc)
        { m_hgdiobj = ::SelectObject(hdc, hgdiobj); }

   ~SelectInHDC() { ::SelectObject(m_hdc, m_hgdiobj); }

   // return true if the object was successfully selected
   operator bool() const { return m_hgdiobj != 0; }

private:
   HDC m_hdc;
   HGDIOBJ m_hgdiobj;

   DECLARE_NO_COPY_CLASS(SelectInHDC)
};

// a class which cleans up any GDI object
class AutoGDIObject
{
protected:
    AutoGDIObject(HGDIOBJ gdiobj) : m_gdiobj(gdiobj) { }
    ~AutoGDIObject() { if ( m_gdiobj ) ::DeleteObject(m_gdiobj); }

    HGDIOBJ GetObject() const { return m_gdiobj; }

private:
    HGDIOBJ m_gdiobj;
};

// TODO: all this asks for using a AutoHandler<T, CreateFunc> template...

// a class for temporary pens
class AutoHBRUSH : private AutoGDIObject
{
public:
    AutoHBRUSH(COLORREF col)
        : AutoGDIObject(::CreateSolidBrush(col)) { }

    operator HBRUSH() const { return (HBRUSH)GetObject(); }
};

// a class for temporary pens
class AutoHPEN : private AutoGDIObject
{
public:
    AutoHPEN(COLORREF col)
        : AutoGDIObject(::CreatePen(PS_SOLID, 0, col)) { }

    operator HPEN() const { return (HPEN)GetObject(); }
};