src/common/radiocmn.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        src/common/radiocmn.cpp
// Purpose:     wxRadioBox methods common to all ports
// Author:      Vadim Zeitlin
// Modified by:
// Created:     03.06.01
// RCS-ID:      $Id$
// Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// License:     wxWindows license
///////////////////////////////////////////////////////////////////////////////

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

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

#ifdef __GNUG__
    #pragma implementation "radioboxbase.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/radiobox.h"
#endif //WX_PRECOMP

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

int wxRadioBoxBase::GetNextItem(int item, wxDirection dir, long style) const
{
    int count = GetCount(),
        numCols = GetColumnCount(),
        numRows = GetRowCount();

    bool horz = (style & wxRA_SPECIFY_COLS) != 0;

    switch ( dir )
    {
        case wxUP:
            if ( horz )
            {
                item -= numCols;
            }
            else // vertical layout
            {
                if ( !item-- )
                    item = count - 1;
            }
            break;

        case wxLEFT:
            if ( horz )
            {
                if ( !item-- )
                    item = count - 1;
            }
            else // vertical layout
            {
                item -= numRows;
            }
            break;

        case wxDOWN:
            if ( horz )
            {
                item += numCols;
            }
            else // vertical layout
            {
                if ( ++item == count )
                    item = 0;
            }
            break;

        case wxRIGHT:
            if ( horz )
            {
                if ( ++item == count )
                    item = 0;
            }
            else // vertical layout
            {
                item += numRows;
            }
            break;

        default:
            wxFAIL_MSG( _T("unexpected wxDirection value") );
            return -1;
    }

    // ensure that the item is in range [0..count)
    if ( item < 0 )
    {
        // first map the item to the one in the same column but in the last row
        item += count;

        // now there are 2 cases: either it is the first item of the last row
        // in which case we need to wrap again and get to the last item or we
        // can just go to the previous item
        if ( item % (horz ? numCols : numRows) )
            item--;
        else
            item = count - 1;
    }
    else if ( item >= count )
    {
        // same logic as above
        item -= count;

        // ... except that we need to check if this is not the last item, not
        // the first one
        if ( (item + 1) % (horz ? numCols : numRows) )
            item++;
        else
            item = 0;
    }

    wxASSERT_MSG( item < count && item >= 0,
                  _T("logic error in wxRadioBox::GetNextItem()") );

    return item;
}

#endif // wxUSE_RADIOBOX
Commit	Line	Data
	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: src/common/radiocmn.cpp
	3	// Purpose: wxRadioBox methods common to all ports
	4	// Author: Vadim Zeitlin
	5	// Modified by:
	6	// Created: 03.06.01
	7	// RCS-ID: $Id$
	8	// Copyright: (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
	9	// License: wxWindows license
	10	///////////////////////////////////////////////////////////////////////////////
	11
	12	// ============================================================================
	13	// declarations
	14	// ============================================================================
	15
	16	// ----------------------------------------------------------------------------
	17	// headers
	18	// ----------------------------------------------------------------------------
	19
	20	#ifdef __GNUG__
	21	#pragma implementation "radioboxbase.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	#if wxUSE_RADIOBOX
	32
	33	#ifndef WX_PRECOMP
	34	#include "wx/radiobox.h"
	35	#endif //WX_PRECOMP
	36
	37	// ============================================================================
	38	// implementation
	39	// ============================================================================
	40
	41	int wxRadioBoxBase::GetNextItem(int item, wxDirection dir, long style) const
	42	{
	43	int count = GetCount(),
	44	numCols = GetColumnCount(),
	45	numRows = GetRowCount();
	46
	47	bool horz = (style & wxRA_SPECIFY_COLS) != 0;
	48
	49	switch ( dir )
	50	{
	51	case wxUP:
	52	if ( horz )
	53	{
	54	item -= numCols;
	55	}
	56	else // vertical layout
	57	{
	58	if ( !item-- )
	59	item = count - 1;
	60	}
	61	break;
	62
	63	case wxLEFT:
	64	if ( horz )
	65	{
	66	if ( !item-- )
	67	item = count - 1;
	68	}
	69	else // vertical layout
	70	{
	71	item -= numRows;
	72	}
	73	break;
	74
	75	case wxDOWN:
	76	if ( horz )
	77	{
	78	item += numCols;
	79	}
	80	else // vertical layout
	81	{
	82	if ( ++item == count )
	83	item = 0;
	84	}
	85	break;
	86
	87	case wxRIGHT:
	88	if ( horz )
	89	{
	90	if ( ++item == count )
	91	item = 0;
	92	}
	93	else // vertical layout
	94	{
	95	item += numRows;
	96	}
	97	break;
	98
	99	default:
	100	wxFAIL_MSG( _T("unexpected wxDirection value") );
	101	return -1;
	102	}
	103
	104	// ensure that the item is in range [0..count)
	105	if ( item < 0 )
	106	{
	107	// first map the item to the one in the same column but in the last row
	108	item += count;
	109
	110	// now there are 2 cases: either it is the first item of the last row
	111	// in which case we need to wrap again and get to the last item or we
	112	// can just go to the previous item
	113	if ( item % (horz ? numCols : numRows) )
	114	item--;
	115	else
	116	item = count - 1;
	117	}
	118	else if ( item >= count )
	119	{
	120	// same logic as above
	121	item -= count;
	122
	123	// ... except that we need to check if this is not the last item, not
	124	// the first one
	125	if ( (item + 1) % (horz ? numCols : numRows) )
	126	item++;
	127	else
	128	item = 0;
	129	}
	130
	131	wxASSERT_MSG( item < count && item >= 0,
	132	_T("logic error in wxRadioBox::GetNextItem()") );
	133
	134	return item;
	135	}
	136
	137	#endif // wxUSE_RADIOBOX
	138