radiobox.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        msw/radiobox.cpp
// Purpose:     wxRadioBox implementation
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id: radiobox.cpp,v 1.122.2.2 2006/01/18 16:16:21 JS Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

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

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

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_RADIOBOX

#ifndef WX_PRECOMP
    #include "wx/bitmap.h"
    #include "wx/brush.h"
    #include "wx/radiobox.h"
    #include "wx/settings.h"
    #include "wx/log.h"
#endif

#include "wx/msw/subwin.h"

#if wxUSE_TOOLTIPS
    #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
        #include <commctrl.h>
    #endif
    #include "wx/tooltip.h"
#endif // wxUSE_TOOLTIPS

// TODO: wxCONSTRUCTOR
#if 0 // wxUSE_EXTENDED_RTTI
WX_DEFINE_FLAGS( wxRadioBoxStyle )

wxBEGIN_FLAGS( wxRadioBoxStyle )
    // 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(wxRA_SPECIFY_COLS)
    wxFLAGS_MEMBER(wxRA_HORIZONTAL)
    wxFLAGS_MEMBER(wxRA_SPECIFY_ROWS)
    wxFLAGS_MEMBER(wxRA_VERTICAL)

wxEND_FLAGS( wxRadioBoxStyle )

IMPLEMENT_DYNAMIC_CLASS_XTI(wxRadioBox, wxControl,"wx/radiobox.h")

wxBEGIN_PROPERTIES_TABLE(wxRadioBox)
    wxEVENT_PROPERTY( Select , wxEVT_COMMAND_RADIOBOX_SELECTED , wxCommandEvent )
    wxPROPERTY_FLAGS( WindowStyle , wxRadioBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
wxEND_PROPERTIES_TABLE()

#else
IMPLEMENT_DYNAMIC_CLASS(wxRadioBox, wxControl)
#endif

/*
    selection
    content
        label
        dimension
        item
*/

// ---------------------------------------------------------------------------
// private functions
// ---------------------------------------------------------------------------

// wnd proc for radio buttons
LRESULT APIENTRY _EXPORT wxRadioBtnWndProc(HWND hWnd,
                                           UINT message,
                                           WPARAM wParam,
                                           LPARAM lParam);

// ---------------------------------------------------------------------------
// global vars
// ---------------------------------------------------------------------------

// the pointer to standard radio button wnd proc
static WXFARPROC s_wndprocRadioBtn = (WXFARPROC)NULL;

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

// ---------------------------------------------------------------------------
// wxRadioBox creation
// ---------------------------------------------------------------------------

// Radio box item
void wxRadioBox::Init()
{
    m_selectedButton = wxNOT_FOUND;
    m_radioButtons = NULL;
    m_majorDim = 0;
    m_radioWidth = NULL;
    m_radioHeight = NULL;
}

bool wxRadioBox::Create(wxWindow *parent,
                        wxWindowID id,
                        const wxString& title,
                        const wxPoint& pos,
                        const wxSize& size,
                        int n,
                        const wxString choices[],
                        int majorDim,
                        long style,
                        const wxValidator& val,
                        const wxString& name)
{
    // initialize members
    m_majorDim = majorDim == 0 ? n : majorDim;

    // common initialization
    if ( !wxStaticBox::Create(parent, id, title, pos, size, style, name) )
        return false;

#if wxUSE_VALIDATORS
    SetValidator(val);
#else
    wxUnusedVar(val);
#endif // wxUSE_VALIDATORS/!wxUSE_VALIDATORS

    m_radioButtons = new wxSubwindows(n);
    m_radioWidth = new int[n];
    m_radioHeight = new int[n];

    for ( int i = 0; i < n; i++ )
    {
        m_radioWidth[i] =
        m_radioHeight[i] = wxDefaultCoord;
        long styleBtn = BS_AUTORADIOBUTTON | WS_TABSTOP | WS_CHILD | WS_VISIBLE;
        if ( i == 0 )
            styleBtn |= WS_GROUP;

        long newId = NewControlId();

        HWND hwndBtn = ::CreateWindow(_T("BUTTON"),
                                      choices[i],
                                      styleBtn,
                                      0, 0, 0, 0,   // will be set in SetSize()
                                      GetHwndOf(parent),
                                      (HMENU)newId,
                                      wxGetInstance(),
                                      NULL);

        if ( !hwndBtn )
        {
            wxLogLastError(wxT("CreateWindow(radio btn)"));

            return false;
        }

        (*m_radioButtons)[i] = hwndBtn;

        SubclassRadioButton((WXHWND)hwndBtn);

        m_subControls.Add(newId);
    }

    // Create a dummy radio control to end the group.
    (void)::CreateWindow(_T("BUTTON"),
                         wxEmptyString,
                         WS_GROUP | BS_AUTORADIOBUTTON | WS_CHILD,
                         0, 0, 0, 0, GetHwndOf(parent),
                         (HMENU)NewControlId(), wxGetInstance(), NULL);

    m_radioButtons->SetFont(GetFont());

#ifdef __WXWINCE__
    // Set the z-order correctly
    SetWindowPos(GetHwnd(), HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE);
#endif

    SetSelection(0);
    SetSize(pos.x, pos.y, size.x, size.y);

    // Now that we have items determine what is the best size and set it.
    SetBestSize(size);

    return true;
}

bool wxRadioBox::Create(wxWindow *parent,
                        wxWindowID id,
                        const wxString& title,
                        const wxPoint& pos,
                        const wxSize& size,
                        const wxArrayString& choices,
                        int majorDim,
                        long style,
                        const wxValidator& val,
                        const wxString& name)
{
    wxCArrayString chs(choices);
    return Create(parent, id, title, pos, size, chs.GetCount(),
                  chs.GetStrings(), majorDim, style, val, name);
}

wxRadioBox::~wxRadioBox()
{
    m_isBeingDeleted = true;

    delete m_radioButtons;
    delete[] m_radioWidth;
    delete[] m_radioHeight;
}

// NB: if this code is changed, wxGetWindowForHWND() which relies on having the
//     radiobox pointer in GWL_USERDATA for radio buttons must be updated too!
void wxRadioBox::SubclassRadioButton(WXHWND hWndBtn)
{
    HWND hwndBtn = (HWND)hWndBtn;

    if ( !s_wndprocRadioBtn )
        s_wndprocRadioBtn = (WXFARPROC)wxGetWindowProc(hwndBtn);

    wxSetWindowProc(hwndBtn, wxRadioBtnWndProc);
    wxSetWindowUserData(hwndBtn, this);
}

// ----------------------------------------------------------------------------
// events generation
// ----------------------------------------------------------------------------

bool wxRadioBox::MSWCommand(WXUINT cmd, WXWORD id)
{
    if ( cmd == BN_CLICKED )
    {
        if (id == GetId())
            return true;

        int selectedButton = wxNOT_FOUND;

        int count = GetCount();
        for ( int i = 0; i < count; i++ )
        {
            if ( id == wxGetWindowId((*m_radioButtons)[i]) )
            {
                selectedButton = i;

                break;
            }
        }

        if ( selectedButton == wxNOT_FOUND )
        {
            // just ignore it - due to a hack with WM_NCHITTEST handling in our
            // wnd proc, we can receive dummy click messages when we click near
            // the radiobox edge (this is ugly but Julian wouldn't let me get
            // rid of this...)
            return false;
        }

        if ( selectedButton != m_selectedButton )
        {
            m_selectedButton = selectedButton;

            SendNotificationEvent();
        }
        //else: don't generate events when the selection doesn't change

        return true;
    }
    else
        return false;
}

void wxRadioBox::Command(wxCommandEvent & event)
{
    SetSelection (event.GetInt());
    SetFocus();
    ProcessCommand(event);
}

void wxRadioBox::SendNotificationEvent()
{
    wxCommandEvent event(wxEVT_COMMAND_RADIOBOX_SELECTED, m_windowId);
    event.SetInt( m_selectedButton );
    event.SetString( GetString(m_selectedButton) );
    event.SetEventObject( this );
    ProcessCommand(event);
}

// ----------------------------------------------------------------------------
// simple accessors
// ----------------------------------------------------------------------------

int wxRadioBox::GetCount() const
{
    return m_radioButtons->GetCount();
}

// returns the number of rows
int wxRadioBox::GetNumVer() const
{
    if ( m_windowStyle & wxRA_SPECIFY_ROWS )
    {
        return m_majorDim;
    }
    else
    {
        return (GetCount() + m_majorDim - 1)/m_majorDim;
    }
}

// returns the number of columns
int wxRadioBox::GetNumHor() const
{
    if ( m_windowStyle & wxRA_SPECIFY_ROWS )
    {
        return (GetCount() + m_majorDim - 1)/m_majorDim;
    }
    else
    {
        return m_majorDim;
    }
}

void wxRadioBox::SetString(int item, const wxString& label)
{
    wxCHECK_RET( IsValid(item), wxT("invalid radiobox index") );

    m_radioWidth[item] =
    m_radioHeight[item] = wxDefaultCoord;

    ::SetWindowText((*m_radioButtons)[item], label.c_str());

    InvalidateBestSize();
}

void wxRadioBox::SetSelection(int N)
{
    wxCHECK_RET( IsValid(N), wxT("invalid radiobox index") );

    // unselect the old button
    if ( m_selectedButton != wxNOT_FOUND )
        ::SendMessage((*m_radioButtons)[m_selectedButton], BM_SETCHECK, 0, 0L);

    // and select the new one
    ::SendMessage((*m_radioButtons)[N], BM_SETCHECK, 1, 0L);

    m_selectedButton = N;
}

// Find string for position
wxString wxRadioBox::GetString(int item) const
{
    wxCHECK_MSG( IsValid(item), wxEmptyString,
                 wxT("invalid radiobox index") );

    return wxGetWindowText((*m_radioButtons)[item]);
}

void wxRadioBox::SetFocus()
{
    if ( GetCount() > 0 )
    {
        ::SetFocus((*m_radioButtons)[m_selectedButton == wxNOT_FOUND
                                        ? 0
                                        : m_selectedButton]);
    }
}

// Enable a specific button
bool wxRadioBox::Enable(int item, bool enable)
{
    wxCHECK_MSG( IsValid(item), false,
                 wxT("invalid item in wxRadioBox::Enable()") );

    BOOL ret = ::EnableWindow((*m_radioButtons)[item], enable);

    return (ret == 0) == enable;
}

// Show a specific button
bool wxRadioBox::Show(int item, bool show)
{
    wxCHECK_MSG( IsValid(item), false,
                 wxT("invalid item in wxRadioBox::Show()") );

    BOOL ret = ::ShowWindow((*m_radioButtons)[item], show ? SW_SHOW : SW_HIDE);

    bool changed = (ret != 0) == show;