bmpbuttn.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        src/msw/bmpbuttn.cpp
// Purpose:     wxBitmapButton
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id: bmpbuttn.cpp,v 1.57.2.3 2006/04/01 13:53:01 JG Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "bmpbuttn.h"
#endif

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_BMPBUTTON

#ifndef WX_PRECOMP
    #include "wx/bmpbuttn.h"
    #include "wx/log.h"
    #include "wx/dcmemory.h"
#endif

#include "wx/msw/private.h"
#include "wx/image.h"

#if wxUSE_UXTHEME
    #include "wx/msw/uxtheme.h"

    // no need to include tmschema.h
    #ifndef BP_PUSHBUTTON
        #define BP_PUSHBUTTON 1

        #define PBS_NORMAL    1
        #define PBS_HOT       2
        #define PBS_PRESSED   3
        #define PBS_DISABLED  4
        #define PBS_DEFAULTED 5

        #define TMT_CONTENTMARGINS 3602
    #endif
#endif // wxUSE_UXTHEME

#ifndef ODS_NOFOCUSRECT
    #define ODS_NOFOCUSRECT     0x0200
#endif

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

#if wxUSE_EXTENDED_RTTI

WX_DEFINE_FLAGS( wxBitmapButtonStyle )

wxBEGIN_FLAGS( wxBitmapButtonStyle )
    // new style border flags, we put them first to
    // use them for streaming out
    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
    wxFLAGS_MEMBER(wxBORDER_RAISED)
    wxFLAGS_MEMBER(wxBORDER_STATIC)
    wxFLAGS_MEMBER(wxBORDER_NONE)

    // old style border flags
    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
    wxFLAGS_MEMBER(wxRAISED_BORDER)
    wxFLAGS_MEMBER(wxSTATIC_BORDER)
    wxFLAGS_MEMBER(wxBORDER)

    // standard window styles
    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
    wxFLAGS_MEMBER(wxWANTS_CHARS)
    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
    wxFLAGS_MEMBER(wxVSCROLL)
    wxFLAGS_MEMBER(wxHSCROLL)

    wxFLAGS_MEMBER(wxBU_AUTODRAW)
    wxFLAGS_MEMBER(wxBU_LEFT)
    wxFLAGS_MEMBER(wxBU_RIGHT)
    wxFLAGS_MEMBER(wxBU_TOP)
    wxFLAGS_MEMBER(wxBU_BOTTOM)
wxEND_FLAGS( wxBitmapButtonStyle )

IMPLEMENT_DYNAMIC_CLASS_XTI(wxBitmapButton, wxButton,"wx/bmpbuttn.h")

wxBEGIN_PROPERTIES_TABLE(wxBitmapButton)
    wxPROPERTY_FLAGS( WindowStyle , wxBitmapButtonStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxBitmapButton)
wxEND_HANDLERS_TABLE()

wxCONSTRUCTOR_5( wxBitmapButton , wxWindow* , Parent , wxWindowID , Id , wxBitmap , Bitmap , wxPoint , Position , wxSize , Size )

#else
IMPLEMENT_DYNAMIC_CLASS(wxBitmapButton, wxButton)
#endif

BEGIN_EVENT_TABLE(wxBitmapButton, wxBitmapButtonBase)
    EVT_SYS_COLOUR_CHANGED(wxBitmapButton::OnSysColourChanged)
END_EVENT_TABLE()

/*
TODO PROPERTIES :

long "style" , wxBU_AUTODRAW
bool "default" , 0
bitmap "selected" ,
bitmap "focus" ,
bitmap "disabled" ,
*/

bool wxBitmapButton::Create(wxWindow *parent, wxWindowID id,
    const wxBitmap& bitmap,
    const wxPoint& pos,
    const wxSize& size, long style,
    const wxValidator& wxVALIDATOR_PARAM(validator),
    const wxString& name)
{
    m_bmpNormal = bitmap;
    SetName(name);

#if wxUSE_VALIDATORS
    SetValidator(validator);
#endif // wxUSE_VALIDATORS

    parent->AddChild(this);

    m_windowStyle = style;

    if ( style & wxBU_AUTODRAW )
    {
        m_marginX = wxDEFAULT_BUTTON_MARGIN;
        m_marginY = wxDEFAULT_BUTTON_MARGIN;
    }

    if (id == wxID_ANY)
        m_windowId = NewControlId();
    else
        m_windowId = id;

    long msStyle = WS_VISIBLE | WS_TABSTOP | WS_CHILD | BS_OWNERDRAW ;

    if ( m_windowStyle & wxCLIP_SIBLINGS )
        msStyle |= 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(
                    0,
                    wxT("BUTTON"),
                    wxEmptyString,
                    msStyle,
                    0, 0, 0, 0,
                    GetWinHwnd(parent),
                    (HMENU)m_windowId,
                    wxGetInstance(),
                    NULL
                   );

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

    SetPosition(pos);
    SetBestSize(size);

    return true;
}

bool wxBitmapButton::SetBackgroundColour(const wxColour& colour)
{
    if ( !wxBitmapButtonBase::SetBackgroundColour(colour) )
    {
        // didn't change
        return false;
    }

    // invalidate the brush, it will be recreated the next time it's needed
    m_brushDisabled = wxNullBrush;

    return true;
}

void wxBitmapButton::OnSysColourChanged(wxSysColourChangedEvent& event)
{
    m_brushDisabled = wxNullBrush;

    if ( !IsEnabled() )
    {
        // this change affects our current state
        Refresh();
    }

    event.Skip();
}

#if wxUSE_UXTHEME
static
void MSWDrawXPBackground(wxButton *button, WXDRAWITEMSTRUCT *wxdis)
{
    LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT)wxdis;
    HDC hdc = lpDIS->hDC;
    UINT state = lpDIS->itemState;
    RECT rectBtn;
    CopyRect(&rectBtn, &lpDIS->rcItem);

    wxUxThemeHandle theme(button, L"BUTTON");
    int iState;

    if ( state & ODS_SELECTED )
    {
        iState = PBS_PRESSED;
    }
    else if ( button->HasCapture() || button->IsMouseInWindow() )
    {
        iState = PBS_HOT;
    }
    else if ( state & ODS_FOCUS )
    {
        iState = PBS_DEFAULTED;
    }
    else if ( state & ODS_DISABLED )
    {
        iState = PBS_DISABLED;
    }
    else
    {
        iState = PBS_NORMAL;
    }

    // draw parent background if needed
    if ( wxUxThemeEngine::Get()->IsThemeBackgroundPartiallyTransparent(theme,
                                                                       BP_PUSHBUTTON,
                                                                       iState) )
    {
        wxUxThemeEngine::Get()->DrawThemeParentBackground(GetHwndOf(button), hdc, &rectBtn);
    }

    // draw background
    wxUxThemeEngine::Get()->DrawThemeBackground(theme, hdc, BP_PUSHBUTTON, iState,
                                                &rectBtn, NULL);

    // calculate content area margins
    MARGINS margins;
    wxUxThemeEngine::Get()->GetThemeMargins(theme, hdc, BP_PUSHBUTTON, iState,
                                            TMT_CONTENTMARGINS, &rectBtn, &margins);
    RECT rectClient;
    ::CopyRect(&rectClient, &rectBtn);
    ::InflateRect(&rectClient, -margins.cxLeftWidth, -margins.cyTopHeight);

    // if focused and !nofocus rect
    if ( (state & ODS_FOCUS) && !(state & ODS_NOFOCUSRECT) )
    {
        DrawFocusRect(hdc, &rectClient);
    }

    if ( button->UseBgCol() )
    {
        COLORREF colBg = wxColourToRGB(button->GetBackgroundColour());
        HBRUSH hbrushBackground = ::CreateSolidBrush(colBg);

        // don't overwrite the focus rect
        ::InflateRect(&rectClient, -1, -1);
        FillRect(hdc, &rectClient, hbrushBackground);
        ::DeleteObject(hbrushBackground);
    }
}
#endif // wxUSE_UXTHEME

// VZ: should be at the very least less than wxDEFAULT_BUTTON_MARGIN
#define FOCUS_MARGIN 3

bool wxBitmapButton::MSWOnDraw(WXDRAWITEMSTRUCT *item)
{
#ifndef __WXWINCE__
    long style = GetWindowLong((HWND) GetHWND(), GWL_STYLE);
    if (style & BS_BITMAP)
    {
        // Let default procedure draw the bitmap, which is defined
        // in the Windows resource.
        return false;
    }
#endif

    LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT) item;
    HDC hDC                = lpDIS->hDC;
    UINT state             = lpDIS->itemState;
    bool isSelected        = (state & ODS_SELECTED) != 0;
    bool autoDraw          = (GetWindowStyleFlag() & wxBU_AUTODRAW) != 0;


    // choose the bitmap to use depending on the button state
    wxBitmap* bitmap;

    if ( isSelected && m_bmpSelected.Ok() )
        bitmap = &m_bmpSelected;
    else if ((state & ODS_FOCUS) && m_bmpFocus.Ok())
        bitmap = &m_bmpFocus;
    else if ((state & ODS_DISABLED) && m_bmpDisabled.Ok())
        bitmap = &m_bmpDisabled;
    else
        bitmap = &m_bmpNormal;

    if ( !bitmap->Ok() )
        return false;

    // centre the bitmap in the control area
    int x      = lpDIS->rcItem.left;
    int y      = lpDIS->rcItem.top;
    int width  = lpDIS->rcItem.right - x;
    int height = lpDIS->rcItem.bottom - y;