src/msw/button.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        msw/button.cpp
// Purpose:     wxButton
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#ifdef __GNUG__
    #pragma implementation "button.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/button.h"
    #include "wx/brush.h"
    #include "wx/panel.h"
    #include "wx/bmpbuttn.h"
    #include "wx/settings.h"
    #include "wx/dcscreen.h"
#endif

#include "wx/msw/private.h"

// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)

// this macro tries to adjust the default button height to a reasonable value
// using the char height as the base
#define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10)

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// creation/destruction
// ----------------------------------------------------------------------------

bool wxButton::Create(wxWindow *parent,
                      wxWindowID id,
                      const wxString& label,
                      const wxPoint& pos,
                      const wxSize& size,
                      long style,
                      const wxValidator& validator,
                      const wxString& name)
{
    if ( !CreateBase(parent, id, pos, size, style, validator, name) )
        return FALSE;

    parent->AddChild((wxButton *)this);

    m_backgroundColour = parent->GetBackgroundColour();
    m_foregroundColour = parent->GetForegroundColour();

    long msStyle = WS_VISIBLE | WS_TABSTOP | WS_CHILD /* | WS_CLIPSIBLINGS */ ;

#ifdef __WIN32__
    if(m_windowStyle & wxBU_LEFT)
        msStyle |= BS_LEFT;
    if(m_windowStyle & wxBU_RIGHT)
        msStyle |= BS_RIGHT;
    if(m_windowStyle & wxBU_TOP)
        msStyle |= BS_TOP;
    if(m_windowStyle & wxBU_BOTTOM)
        msStyle |= BS_BOTTOM;
#endif

    m_hWnd = (WXHWND)CreateWindowEx
                     (
                      MakeExtendedStyle(m_windowStyle),
                      wxT("BUTTON"),
                      label,
                      msStyle,
                      0, 0, 0, 0,
                      GetWinHwnd(parent),
                      (HMENU)m_windowId,
                      wxGetInstance(),
                      NULL
                     );

    if (m_hWnd == 0)
    {
        wxString msg;
#ifdef __WIN16__
        msg.Printf(wxT("CreateWindowEx failed"));
#else
        msg.Printf(wxT("CreateWindowEx failed with error number %ld"), (long) GetLastError());
#endif
        wxFAIL_MSG(msg);
    }

    // Subclass again for purposes of dialog editing mode
    SubclassWin(m_hWnd);

    SetFont(parent->GetFont());

    SetSize(pos.x, pos.y, size.x, size.y);

    return TRUE;
}

wxButton::~wxButton()
{
    wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
    if ( panel )
    {
        if ( panel->GetDefaultItem() == this )
        {
            // don't leave the panel with invalid default item
            panel->SetDefaultItem(NULL);
        }
    }
}

// ----------------------------------------------------------------------------
// size management including autosizing
// ----------------------------------------------------------------------------

wxSize wxButton::DoGetBestSize() const
{
    wxString label = wxGetWindowText(GetHWND());
    int wBtn;
    GetTextExtent(label, &wBtn, NULL);

    int wChar, hChar;
    wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont());

    // add a margin - the button is wider than just its label
    wBtn += 3*wChar;

    // the button height is proportional to the height of the font used
    int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);

    wxSize sz = GetDefaultSize();
    if (wBtn > sz.x) sz.x = wBtn;
    if (hBtn > sz.y) sz.y = hBtn;

    return sz;
}

/* static */
wxSize wxButton::GetDefaultSize()
{
    static wxSize s_sizeBtn;

    if ( s_sizeBtn.x == 0 )
    {
        wxScreenDC dc;
        dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));

        // the size of a standard button in the dialog units is 50x14,
        // translate this to pixels
        // NB1: the multipliers come from the Windows convention
        // NB2: the extra +1/+2 were needed to get the size be the same as the
        //      size of the buttons in the standard dialog - I don't know how
        //      this happens, but on my system this size is 75x23 in pixels and
        //      23*8 isn't even divisible by 14... Would be nice to understand
        //      why these constants are needed though!
        s_sizeBtn.x = (50 * (dc.GetCharWidth() + 1))/4;
        s_sizeBtn.y = ((14 * dc.GetCharHeight()) + 2)/8;
    }

    return s_sizeBtn;
}

// ----------------------------------------------------------------------------
// set this button as the default one in its panel
// ----------------------------------------------------------------------------

void wxButton::SetDefault()
{
    wxWindow *parent = GetParent();
    wxButton *btnOldDefault = NULL;
    wxPanel *panel = wxDynamicCast(parent, wxPanel);
    if ( panel )
    {
        btnOldDefault = panel->GetDefaultItem();
        panel->SetDefaultItem(this);
    }

    if ( parent )
    {
        SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
    }

    if ( btnOldDefault )
    {
        // remove the BS_DEFPUSHBUTTON style from the other button
        long style = GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE);

        // don't do it with the owner drawn buttons because it will reset
        // BS_OWNERDRAW style bit too (BS_OWNERDRAW & BS_DEFPUSHBUTTON != 0)!
        if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
        {
            style &= ~BS_DEFPUSHBUTTON;
            SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L);
        }
        else
        {
            // redraw the button - it will notice itself that it's not the
            // default one any longer
            btnOldDefault->Refresh();
        }
    }

    // set this button as the default
    long style = GetWindowLong(GetHwnd(), GWL_STYLE);
    if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
    {
        style |= BS_DEFPUSHBUTTON;
        SendMessage(GetHwnd(), BM_SETSTYLE, style, 1L);
    }
}

// ----------------------------------------------------------------------------
// helpers
// ----------------------------------------------------------------------------

bool wxButton::SendClickEvent()
{
    wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
    event.SetEventObject(this);

    return ProcessCommand(event);
}

void wxButton::Command(wxCommandEvent & event)
{
    ProcessCommand(event);
}

// ----------------------------------------------------------------------------
// event/message handlers
// ----------------------------------------------------------------------------

bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
{
    bool processed = FALSE;
    switch ( param )
    {
        case 1:                     // message came from an accelerator
        case BN_CLICKED:            // normal buttons send this
        case BN_DOUBLECLICKED:      // owner-drawn ones also send this
            processed = SendClickEvent();
            break;
    }

    return processed;
}

long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
    // when we receive focus, we want to become the default button in our
    // parent panel
    if ( nMsg == WM_SETFOCUS )
    {
        SetDefault();

        // let the default processign take place too
    }
    else if ( nMsg == WM_LBUTTONDBLCLK )
    {
        // emulate a click event to force an owner-drawn button to change its
        // appearance - without this, it won't do it
        (void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam);

        // and conitnue with processing the message normally as well
    }

    // let the base class do all real processing
    return wxControl::MSWWindowProc(nMsg, wParam, lParam);
}

// ----------------------------------------------------------------------------
// owner-drawn buttons support
// ----------------------------------------------------------------------------

#ifdef __WIN32__

// drawing helpers

static void DrawButtonText(HDC hdc,
                           RECT *pRect,
                           const wxString& text,
                           COLORREF col)
{
    COLORREF colOld = SetTextColor(hdc, col);
    int modeOld = SetBkMode(hdc, TRANSPARENT);

    DrawText(hdc, text, text.length(), pRect,
             DT_CENTER | DT_VCENTER | DT_SINGLELINE);

    SetBkMode(hdc, modeOld);
    SetTextColor(hdc, colOld);
}

static void DrawRect(HDC hdc, const RECT& r)
{
    MoveToEx(hdc, r.left, r.top, NULL);
    LineTo(hdc, r.right, r.top);
    LineTo(hdc, r.right, r.bottom);
    LineTo(hdc, r.left, r.bottom);
    LineTo(hdc, r.left, r.top);
}

void wxButton::MakeOwnerDrawn()
{
    long style = GetWindowLong(GetHwnd(), GWL_STYLE);
    if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
    {
        // make it so
        style |= BS_OWNERDRAW;
        SetWindowLong(GetHwnd(), GWL_STYLE, style);
    }
}

bool wxButton::SetBackgroundColour(const wxColour &colour)
{
    if ( !wxControl::SetBackgroundColour(colour) )
    {
        // nothing to do
        return FALSE;
    }

    MakeOwnerDrawn();

    Refresh();

    return TRUE;
}

bool wxButton::SetForegroundColour(const wxColour &colour)
{
    if ( !wxControl::SetForegroundColour(colour) )
    {
        // nothing to do
        return FALSE;
    }

    MakeOwnerDrawn();

    Refresh();

    return TRUE;
}

/*
   The button frame looks like this normally:

   WWWWWWWWWWWWWWWWWWB
   WHHHHHHHHHHHHHHHHGB  W = white       (HILIGHT)
   WH               GB  H = light grey  (LIGHT)
   WH               GB  G = dark grey   (SHADOW)
   WH               GB  B = black       (DKSHADOW)
   WH               GB
   WGGGGGGGGGGGGGGGGGB
   BBBBBBBBBBBBBBBBBBB

   When the button is selected, the button becomes like this (the total button
   size doesn't change):

   BBBBBBBBBBBBBBBBBBB
   BWWWWWWWWWWWWWWWWBB
   BWHHHHHHHHHHHHHHGBB
   BWH             GBB
   BWH             GBB
   BWGGGGGGGGGGGGGGGBB
   BBBBBBBBBBBBBBBBBBB
   BBBBBBBBBBBBBBBBBBB

   When the button is pushed (while selected) it is like:

   BBBBBBBBBBBBBBBBBBB
   BGGGGGGGGGGGGGGGGGB
   BG               GB
   BG               GB
   BG               GB
   BG               GB
   BGGGGGGGGGGGGGGGGGB
   BBBBBBBBBBBBBBBBBBB
*/

static void DrawButtonFrame(HDC hdc, const RECT& rectBtn,
                            bool selected, bool pushed)
{
    RECT r;
    CopyRect(&r, &rectBtn);

    HPEN hpenBlack   = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DDKSHADOW)),
         hpenGrey    = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DSHADOW)),
         hpenLightGr = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DLIGHT)),
         hpenWhite   = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DHILIGHT));

    HPEN hpenOld = (HPEN)SelectObject(hdc, hpenBlack);

    r.right--;
    r.bottom--;

    if ( pushed )
    {
        DrawRect(hdc, r);

        (void)SelectObject(hdc, hpenGrey);
        InflateRect(&r, -1, -1);

        DrawRect(hdc, r);
    }
    else // !pushed
    {
        if ( selected )
        {
            DrawRect(hdc, r);

            InflateRect(&r, -1, -1);
        }

        MoveToEx(hdc, r.left, r.bottom, NULL);
        LineTo(hdc, r.right, r.bottom);
        LineTo(hdc, r.right, r.top - 1);

        (void)SelectObject(hdc, hpenWhite);
        MoveToEx(hdc, r.left, r.bottom - 1, NULL);
        LineTo(hdc, r.left, r.top);
        LineTo(hdc, r.right, r.top);

        (void)SelectObject(hdc, hpenLightGr);
        MoveToEx(hdc, r.left + 1, r.bottom - 2, NULL);
        LineTo(hdc, r.left + 1, r.top + 1);
        LineTo(hdc, r.right - 1, r.top + 1);

        (void)SelectObject(hdc, hpenGrey);
        MoveToEx(hdc, r.left + 1, r.bottom - 1, NULL);
        LineTo(hdc, r.right - 1, r.bottom - 1);
        LineTo(hdc, r.right - 1, r.top);
    }

    (void)SelectObject(hdc, hpenOld);
    DeleteObject(hpenWhite);
    DeleteObject(hpenLightGr);
    DeleteObject(hpenGrey);
    DeleteObject(hpenBlack);
}

bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis)
{
    LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT)wxdis;

    RECT rectBtn;
    CopyRect(&rectBtn, &lpDIS->rcItem);

    COLORREF colBg = wxColourToRGB(GetBackgroundColour()),
             colFg = wxColourToRGB(GetForegroundColour());

    HDC hdc = lpDIS->hDC;
    UINT state = lpDIS->itemState;

    // first, draw the background
    HBRUSH hbrushBackground = ::CreateSolidBrush(colBg);

    FillRect(hdc, &rectBtn, hbrushBackground);

    // draw the border for the current state
    bool selected = (state & ODS_SELECTED) != 0;
    if ( !selected )
    {
        wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
        if ( panel )
        {
            selected = panel->GetDefaultItem() == this;
        }
    }
    bool pushed = (SendMessage(GetHwnd(), BM_GETSTATE, 0, 0) & BST_PUSHED) != 0;

    DrawButtonFrame(hdc, rectBtn, selected, pushed);

    // draw the focus rect if needed
    if ( state & ODS_FOCUS )
    {
        RECT rectFocus;
        CopyRect(&rectFocus, &rectBtn);

        // I don't know where does this constant come from, but this is how
        // Windows draws them
        InflateRect(&rectFocus, -4, -4);

        DrawFocusRect(hdc, &rectFocus);
    }

    if ( pushed )
    {
        // the label is shifted by 1 pixel to create "pushed" effect
        OffsetRect(&rectBtn, 1, 1);
    }

    DrawButtonText(hdc, &rectBtn, GetLabel(),
                   state & ODS_DISABLED ? GetSysColor(COLOR_GRAYTEXT)
                                        : colFg);

    ::DeleteObject(hbrushBackground);

    return TRUE;
}

#endif // __WIN32__
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: msw/button.cpp
	3	// Purpose: wxButton
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 04/01/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart and Markus Holzem
	9	// Licence: wxWindows license
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	// ============================================================================
	13	// declarations
	14	// ============================================================================
	15
	16	// ----------------------------------------------------------------------------
	17	// headers
	18	// ----------------------------------------------------------------------------
	19
	20	#ifdef __GNUG__
	21	#pragma implementation "button.h"
	22	#endif
	23
	24	// For compilers that support precompilation, includes "wx.h".
	25	#include "wx/wxprec.h"
	26
	27	#ifdef __BORLANDC__
	28	#pragma hdrstop
	29	#endif
	30
	31	#ifndef WX_PRECOMP
	32	#include "wx/button.h"
	33	#include "wx/brush.h"
	34	#include "wx/panel.h"
	35	#include "wx/bmpbuttn.h"
	36	#include "wx/settings.h"
	37	#include "wx/dcscreen.h"
	38	#endif
	39
	40	#include "wx/msw/private.h"
	41
	42	// ----------------------------------------------------------------------------
	43	// macros
	44	// ----------------------------------------------------------------------------
	45
	46	IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
	47
	48	// this macro tries to adjust the default button height to a reasonable value
	49	// using the char height as the base
	50	#define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10)
	51
	52	// ============================================================================
	53	// implementation
	54	// ============================================================================
	55
	56	// ----------------------------------------------------------------------------
	57	// creation/destruction
	58	// ----------------------------------------------------------------------------
	59
	60	bool wxButton::Create(wxWindow *parent,
	61	wxWindowID id,
	62	const wxString& label,
	63	const wxPoint& pos,
	64	const wxSize& size,
	65	long style,
	66	const wxValidator& validator,
	67	const wxString& name)
	68	{
	69	if ( !CreateBase(parent, id, pos, size, style, validator, name) )
	70	return FALSE;
	71
	72	parent->AddChild((wxButton *)this);
	73
	74	m_backgroundColour = parent->GetBackgroundColour();
	75	m_foregroundColour = parent->GetForegroundColour();
	76
	77	long msStyle = WS_VISIBLE \| WS_TABSTOP \| WS_CHILD /* \| WS_CLIPSIBLINGS */ ;
	78
	79	#ifdef __WIN32__
	80	if(m_windowStyle & wxBU_LEFT)
	81	msStyle \|= BS_LEFT;
	82	if(m_windowStyle & wxBU_RIGHT)
	83	msStyle \|= BS_RIGHT;
	84	if(m_windowStyle & wxBU_TOP)
	85	msStyle \|= BS_TOP;
	86	if(m_windowStyle & wxBU_BOTTOM)
	87	msStyle \|= BS_BOTTOM;
	88	#endif
	89
	90	m_hWnd = (WXHWND)CreateWindowEx
	91	(
	92	MakeExtendedStyle(m_windowStyle),
	93	wxT("BUTTON"),
	94	label,
	95	msStyle,
	96	0, 0, 0, 0,
	97	GetWinHwnd(parent),
	98	(HMENU)m_windowId,
	99	wxGetInstance(),
	100	NULL
	101	);
	102
	103	if (m_hWnd == 0)
	104	{
	105	wxString msg;
	106	#ifdef __WIN16__
	107	msg.Printf(wxT("CreateWindowEx failed"));
	108	#else
	109	msg.Printf(wxT("CreateWindowEx failed with error number %ld"), (long) GetLastError());
	110	#endif
	111	wxFAIL_MSG(msg);
	112	}
	113
	114	// Subclass again for purposes of dialog editing mode
	115	SubclassWin(m_hWnd);
	116
	117	SetFont(parent->GetFont());
	118
	119	SetSize(pos.x, pos.y, size.x, size.y);
	120
	121	return TRUE;
	122	}
	123
	124	wxButton::~wxButton()
	125	{
	126	wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
	127	if ( panel )
	128	{
	129	if ( panel->GetDefaultItem() == this )
	130	{
	131	// don't leave the panel with invalid default item
	132	panel->SetDefaultItem(NULL);
	133	}
	134	}
	135	}
	136
	137	// ----------------------------------------------------------------------------
	138	// size management including autosizing
	139	// ----------------------------------------------------------------------------
	140
	141	wxSize wxButton::DoGetBestSize() const
	142	{
	143	wxString label = wxGetWindowText(GetHWND());
	144	int wBtn;
	145	GetTextExtent(label, &wBtn, NULL);
	146
	147	int wChar, hChar;
	148	wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont());
	149
	150	// add a margin - the button is wider than just its label
	151	wBtn += 3*wChar;
	152
	153	// the button height is proportional to the height of the font used
	154	int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);
	155
	156	wxSize sz = GetDefaultSize();
	157	if (wBtn > sz.x) sz.x = wBtn;
	158	if (hBtn > sz.y) sz.y = hBtn;
	159
	160	return sz;
	161	}
	162
	163	/* static */
	164	wxSize wxButton::GetDefaultSize()
	165	{
	166	static wxSize s_sizeBtn;
	167
	168	if ( s_sizeBtn.x == 0 )
	169	{
	170	wxScreenDC dc;
	171	dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
	172
	173	// the size of a standard button in the dialog units is 50x14,
	174	// translate this to pixels
	175	// NB1: the multipliers come from the Windows convention
	176	// NB2: the extra +1/+2 were needed to get the size be the same as the
	177	// size of the buttons in the standard dialog - I don't know how
	178	// this happens, but on my system this size is 75x23 in pixels and
	179	// 23*8 isn't even divisible by 14... Would be nice to understand
	180	// why these constants are needed though!
	181	s_sizeBtn.x = (50 * (dc.GetCharWidth() + 1))/4;
	182	s_sizeBtn.y = ((14 * dc.GetCharHeight()) + 2)/8;
	183	}
	184
	185	return s_sizeBtn;
	186	}
	187
	188	// ----------------------------------------------------------------------------
	189	// set this button as the default one in its panel
	190	// ----------------------------------------------------------------------------
	191
	192	void wxButton::SetDefault()
	193	{
	194	wxWindow *parent = GetParent();
	195	wxButton *btnOldDefault = NULL;
	196	wxPanel *panel = wxDynamicCast(parent, wxPanel);
	197	if ( panel )
	198	{
	199	btnOldDefault = panel->GetDefaultItem();
	200	panel->SetDefaultItem(this);
	201	}
	202
	203	if ( parent )
	204	{
	205	SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
	206	}
	207
	208	if ( btnOldDefault )
	209	{
	210	// remove the BS_DEFPUSHBUTTON style from the other button
	211	long style = GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE);
	212
	213	// don't do it with the owner drawn buttons because it will reset
	214	// BS_OWNERDRAW style bit too (BS_OWNERDRAW & BS_DEFPUSHBUTTON != 0)!
	215	if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
	216	{
	217	style &= ~BS_DEFPUSHBUTTON;
	218	SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L);
	219	}
	220	else
	221	{
	222	// redraw the button - it will notice itself that it's not the
	223	// default one any longer
	224	btnOldDefault->Refresh();
	225	}
	226	}
	227
	228	// set this button as the default
	229	long style = GetWindowLong(GetHwnd(), GWL_STYLE);
	230	if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
	231	{
	232	style \|= BS_DEFPUSHBUTTON;
	233	SendMessage(GetHwnd(), BM_SETSTYLE, style, 1L);
	234	}
	235	}
	236
	237	// ----------------------------------------------------------------------------
	238	// helpers
	239	// ----------------------------------------------------------------------------
	240
	241	bool wxButton::SendClickEvent()
	242	{
	243	wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
	244	event.SetEventObject(this);
	245
	246	return ProcessCommand(event);
	247	}
	248
	249	void wxButton::Command(wxCommandEvent & event)
	250	{
	251	ProcessCommand(event);
	252	}
	253
	254	// ----------------------------------------------------------------------------
	255	// event/message handlers
	256	// ----------------------------------------------------------------------------
	257
	258	bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
	259	{
	260	bool processed = FALSE;
	261	switch ( param )
	262	{
	263	case 1: // message came from an accelerator
	264	case BN_CLICKED: // normal buttons send this
	265	case BN_DOUBLECLICKED: // owner-drawn ones also send this
	266	processed = SendClickEvent();
	267	break;
	268	}
	269
	270	return processed;
	271	}
	272
	273	long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
	274	{
	275	// when we receive focus, we want to become the default button in our
	276	// parent panel
	277	if ( nMsg == WM_SETFOCUS )
	278	{
	279	SetDefault();
	280
	281	// let the default processign take place too
	282	}
	283	else if ( nMsg == WM_LBUTTONDBLCLK )
	284	{
	285	// emulate a click event to force an owner-drawn button to change its
	286	// appearance - without this, it won't do it
	287	(void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam);
	288
	289	// and conitnue with processing the message normally as well
	290	}
	291
	292	// let the base class do all real processing
	293	return wxControl::MSWWindowProc(nMsg, wParam, lParam);
	294	}
	295
	296	// ----------------------------------------------------------------------------
	297	// owner-drawn buttons support
	298	// ----------------------------------------------------------------------------
	299
	300	#ifdef __WIN32__
	301
	302	// drawing helpers
	303
	304	static void DrawButtonText(HDC hdc,
	305	RECT *pRect,
	306	const wxString& text,
	307	COLORREF col)
	308	{
	309	COLORREF colOld = SetTextColor(hdc, col);
	310	int modeOld = SetBkMode(hdc, TRANSPARENT);
	311
	312	DrawText(hdc, text, text.length(), pRect,
	313	DT_CENTER \| DT_VCENTER \| DT_SINGLELINE);
	314
	315	SetBkMode(hdc, modeOld);
	316	SetTextColor(hdc, colOld);
	317	}
	318
	319	static void DrawRect(HDC hdc, const RECT& r)
	320	{
	321	MoveToEx(hdc, r.left, r.top, NULL);
	322	LineTo(hdc, r.right, r.top);
	323	LineTo(hdc, r.right, r.bottom);
	324	LineTo(hdc, r.left, r.bottom);
	325	LineTo(hdc, r.left, r.top);
	326	}
	327
	328	void wxButton::MakeOwnerDrawn()
	329	{
	330	long style = GetWindowLong(GetHwnd(), GWL_STYLE);
	331	if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
	332	{
	333	// make it so
	334	style \|= BS_OWNERDRAW;
	335	SetWindowLong(GetHwnd(), GWL_STYLE, style);
	336	}
	337	}
	338
	339	bool wxButton::SetBackgroundColour(const wxColour &colour)
	340	{
	341	if ( !wxControl::SetBackgroundColour(colour) )
	342	{
	343	// nothing to do
	344	return FALSE;
	345	}
	346
	347	MakeOwnerDrawn();
	348
	349	Refresh();
	350
	351	return TRUE;
	352	}
	353
	354	bool wxButton::SetForegroundColour(const wxColour &colour)
	355	{
	356	if ( !wxControl::SetForegroundColour(colour) )
	357	{
	358	// nothing to do
	359	return FALSE;
	360	}
	361
	362	MakeOwnerDrawn();
	363
	364	Refresh();
	365
	366	return TRUE;
	367	}
	368
	369	/*
	370	The button frame looks like this normally:
	371
	372	WWWWWWWWWWWWWWWWWWB
	373	WHHHHHHHHHHHHHHHHGB W = white (HILIGHT)
	374	WH GB H = light grey (LIGHT)
	375	WH GB G = dark grey (SHADOW)
	376	WH GB B = black (DKSHADOW)
	377	WH GB
	378	WGGGGGGGGGGGGGGGGGB
	379	BBBBBBBBBBBBBBBBBBB
	380
	381	When the button is selected, the button becomes like this (the total button
	382	size doesn't change):
	383
	384	BBBBBBBBBBBBBBBBBBB
	385	BWWWWWWWWWWWWWWWWBB
	386	BWHHHHHHHHHHHHHHGBB
	387	BWH GBB
	388	BWH GBB
	389	BWGGGGGGGGGGGGGGGBB
	390	BBBBBBBBBBBBBBBBBBB
	391	BBBBBBBBBBBBBBBBBBB
	392
	393	When the button is pushed (while selected) it is like:
	394
	395	BBBBBBBBBBBBBBBBBBB
	396	BGGGGGGGGGGGGGGGGGB
	397	BG GB
	398	BG GB
	399	BG GB
	400	BG GB
	401	BGGGGGGGGGGGGGGGGGB
	402	BBBBBBBBBBBBBBBBBBB
	403	*/
	404
	405	static void DrawButtonFrame(HDC hdc, const RECT& rectBtn,
	406	bool selected, bool pushed)
	407	{
	408	RECT r;
	409	CopyRect(&r, &rectBtn);
	410
	411	HPEN hpenBlack = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DDKSHADOW)),
	412	hpenGrey = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DSHADOW)),
	413	hpenLightGr = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DLIGHT)),
	414	hpenWhite = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DHILIGHT));
	415
	416	HPEN hpenOld = (HPEN)SelectObject(hdc, hpenBlack);
	417
	418	r.right--;
	419	r.bottom--;
	420
	421	if ( pushed )
	422	{
	423	DrawRect(hdc, r);
	424
	425	(void)SelectObject(hdc, hpenGrey);
	426	InflateRect(&r, -1, -1);
	427
	428	DrawRect(hdc, r);
	429	}
	430	else // !pushed
	431	{
	432	if ( selected )
	433	{
	434	DrawRect(hdc, r);
	435
	436	InflateRect(&r, -1, -1);
	437	}
	438
	439	MoveToEx(hdc, r.left, r.bottom, NULL);
	440	LineTo(hdc, r.right, r.bottom);
	441	LineTo(hdc, r.right, r.top - 1);
	442
	443	(void)SelectObject(hdc, hpenWhite);
	444	MoveToEx(hdc, r.left, r.bottom - 1, NULL);
	445	LineTo(hdc, r.left, r.top);
	446	LineTo(hdc, r.right, r.top);
	447
	448	(void)SelectObject(hdc, hpenLightGr);
	449	MoveToEx(hdc, r.left + 1, r.bottom - 2, NULL);
	450	LineTo(hdc, r.left + 1, r.top + 1);
	451	LineTo(hdc, r.right - 1, r.top + 1);
	452
	453	(void)SelectObject(hdc, hpenGrey);
	454	MoveToEx(hdc, r.left + 1, r.bottom - 1, NULL);
	455	LineTo(hdc, r.right - 1, r.bottom - 1);
	456	LineTo(hdc, r.right - 1, r.top);
	457	}
	458
	459	(void)SelectObject(hdc, hpenOld);
	460	DeleteObject(hpenWhite);
	461	DeleteObject(hpenLightGr);
	462	DeleteObject(hpenGrey);
	463	DeleteObject(hpenBlack);
	464	}
	465
	466	bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis)
	467	{
	468	LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT)wxdis;
	469
	470	RECT rectBtn;
	471	CopyRect(&rectBtn, &lpDIS->rcItem);
	472
	473	COLORREF colBg = wxColourToRGB(GetBackgroundColour()),
	474	colFg = wxColourToRGB(GetForegroundColour());
	475
	476	HDC hdc = lpDIS->hDC;
	477	UINT state = lpDIS->itemState;
	478
	479	// first, draw the background
	480	HBRUSH hbrushBackground = ::CreateSolidBrush(colBg);
	481
	482	FillRect(hdc, &rectBtn, hbrushBackground);
	483
	484	// draw the border for the current state
	485	bool selected = (state & ODS_SELECTED) != 0;
	486	if ( !selected )
	487	{
	488	wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
	489	if ( panel )
	490	{
	491	selected = panel->GetDefaultItem() == this;
	492	}
	493	}
	494	bool pushed = (SendMessage(GetHwnd(), BM_GETSTATE, 0, 0) & BST_PUSHED) != 0;
	495
	496	DrawButtonFrame(hdc, rectBtn, selected, pushed);
	497
	498	// draw the focus rect if needed
	499	if ( state & ODS_FOCUS )
	500	{
	501	RECT rectFocus;
	502	CopyRect(&rectFocus, &rectBtn);
	503
	504	// I don't know where does this constant come from, but this is how
	505	// Windows draws them
	506	InflateRect(&rectFocus, -4, -4);
	507
	508	DrawFocusRect(hdc, &rectFocus);
	509	}
	510
	511	if ( pushed )
	512	{
	513	// the label is shifted by 1 pixel to create "pushed" effect
	514	OffsetRect(&rectBtn, 1, 1);
	515	}
	516
	517	DrawButtonText(hdc, &rectBtn, GetLabel(),
	518	state & ODS_DISABLED ? GetSysColor(COLOR_GRAYTEXT)
	519	: colFg);
	520
	521	::DeleteObject(hbrushBackground);
	522
	523	return TRUE;
	524	}
	525
	526	#endif // __WIN32__