src/common/radiocmn.cpp

   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 licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_RADIOBOX
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/radiobox.h"
  31 #endif //WX_PRECOMP
  32
  33 #if wxUSE_TOOLTIPS
  34     #include "wx/tooltip.h"
  35 #endif // wxUSE_TOOLTIPS
  36
  37 #if wxUSE_HELP
  38     #include "wx/cshelp.h"
  39 #endif
  40
  41 // ============================================================================
  42 // implementation
  43 // ============================================================================
  44
  45 void wxRadioBoxBase::SetMajorDim(unsigned int majorDim, long style)
  46 {
  47     wxCHECK_RET( majorDim != 0, _T("major radiobox dimension can't be 0") );
  48
  49     m_majorDim = majorDim;
  50
  51     int minorDim = (GetCount() + m_majorDim - 1) / m_majorDim;
  52
  53     if ( style & wxRA_SPECIFY_COLS )
  54     {
  55         m_numCols = majorDim;
  56         m_numRows = minorDim;
  57     }
  58     else // wxRA_SPECIFY_ROWS
  59     {
  60         m_numCols = minorDim;
  61         m_numRows = majorDim;
  62     }
  63 }
  64
  65 int wxRadioBoxBase::GetNextItem(int item, wxDirection dir, long style) const
  66 {
  67     int count = GetCount(),
  68         numCols = GetColumnCount(),
  69         numRows = GetRowCount();
  70
  71     bool horz = (style & wxRA_SPECIFY_COLS) != 0;
  72
  73     switch ( dir )
  74     {
  75         case wxUP:
  76             if ( horz )
  77             {
  78                 item -= numCols;
  79             }
  80             else // vertical layout
  81             {
  82                 if ( !item-- )
  83                     item = count - 1;
  84             }
  85             break;
  86
  87         case wxLEFT:
  88             if ( horz )
  89             {
  90                 if ( !item-- )
  91                     item = count - 1;
  92             }
  93             else // vertical layout
  94             {
  95                 item -= numRows;
  96             }
  97             break;
  98
  99         case wxDOWN:
 100             if ( horz )
 101             {
 102                 item += numCols;
 103             }
 104             else // vertical layout
 105             {
 106                 if ( ++item == count )
 107                     item = 0;
 108             }
 109             break;
 110
 111         case wxRIGHT:
 112             if ( horz )
 113             {
 114                 if ( ++item == count )
 115                     item = 0;
 116             }
 117             else // vertical layout
 118             {
 119                 item += numRows;
 120             }
 121             break;
 122
 123         default:
 124             wxFAIL_MSG( _T("unexpected wxDirection value") );
 125             return wxNOT_FOUND;
 126     }
 127
 128     // ensure that the item is in range [0..count)
 129     if ( item < 0 )
 130     {
 131         // first map the item to the one in the same column but in the last row
 132         item += count;
 133
 134         // now there are 2 cases: either it is the first item of the last row
 135         // in which case we need to wrap again and get to the last item or we
 136         // can just go to the previous item
 137         if ( item % (horz ? numCols : numRows) )
 138             item--;
 139         else
 140             item = count - 1;
 141     }
 142     else if ( item >= count )
 143     {
 144         // same logic as above
 145         item -= count;
 146
 147         // ... except that we need to check if this is not the last item, not
 148         // the first one
 149         if ( (item + 1) % (horz ? numCols : numRows) )
 150             item++;
 151         else
 152             item = 0;
 153     }
 154
 155     wxASSERT_MSG( item < count && item >= 0,
 156                   _T("logic error in wxRadioBox::GetNextItem()") );
 157
 158     return item;
 159 }
 160
 161 #if wxUSE_TOOLTIPS
 162
 163 void wxRadioBoxBase::SetItemToolTip(unsigned int item, const wxString& text)
 164 {
 165     wxASSERT_MSG( item < GetCount(), _T("Invalid item index") );
 166
 167     // extend the array to have entries for all our items on first use
 168     if ( !m_itemsTooltips )
 169     {
 170         m_itemsTooltips = new wxToolTipArray;
 171         m_itemsTooltips->resize(GetCount());
 172     }
 173
 174     wxToolTip *tooltip = (*m_itemsTooltips)[item];
 175
 176     bool changed = true;
 177     if ( text.empty() )
 178     {
 179         if ( tooltip )
 180         {
 181             // delete the tooltip
 182             delete tooltip;
 183             tooltip = NULL;
 184         }
 185         else // nothing to do
 186         {
 187             changed = false;
 188         }
 189     }
 190     else // non empty tooltip text
 191     {
 192         if ( tooltip )
 193         {
 194             // just change the existing tooltip text, don't change the tooltip
 195             tooltip->SetTip(text);
 196             changed = false;
 197         }
 198         else // no tooltip yet
 199         {
 200             // create the new one
 201             tooltip = new wxToolTip(text);
 202         }
 203     }
 204
 205     if ( changed )
 206     {
 207         (*m_itemsTooltips)[item] = tooltip;
 208         DoSetItemToolTip(item, tooltip);
 209     }
 210 }
 211
 212 void
 213 wxRadioBoxBase::DoSetItemToolTip(unsigned int WXUNUSED(item),
 214                                  wxToolTip * WXUNUSED(tooltip))
 215 {
 216     // per-item tooltips not implemented by default
 217 }
 218
 219 #endif // wxUSE_TOOLTIPS
 220
 221 wxRadioBoxBase::~wxRadioBoxBase()
 222 {
 223 #if wxUSE_TOOLTIPS
 224     if ( m_itemsTooltips )
 225     {
 226         const size_t n = m_itemsTooltips->size();
 227         for ( size_t i = 0; i < n; i++ )
 228             delete (*m_itemsTooltips)[i];
 229
 230         delete m_itemsTooltips;
 231     }
 232 #endif // wxUSE_TOOLTIPS
 233 }
 234
 235 #if wxUSE_HELP
 236
 237 // set helptext for a particular item
 238 void wxRadioBoxBase::SetItemHelpText(unsigned int n, const wxString& helpText)
 239 {
 240     wxCHECK_RET( n < GetCount(), _T("Invalid item index") );
 241
 242     if ( m_itemsHelpTexts.empty() )
 243     {
 244         // once-only initialization of the array: reserve space for all items
 245         m_itemsHelpTexts.Add(wxEmptyString, GetCount());
 246     }
 247
 248     m_itemsHelpTexts[n] = helpText;
 249 }
 250
 251 // retrieve helptext for a particular item
 252 wxString wxRadioBoxBase::GetItemHelpText( unsigned int n ) const
 253 {
 254     wxCHECK_MSG( n < GetCount(), wxEmptyString, _T("Invalid item index") );
 255
 256     return m_itemsHelpTexts.empty() ? wxString() : m_itemsHelpTexts[n];
 257 }
 258
 259 // return help text for the item for which wxEVT_HELP was generated.
 260 wxString wxRadioBoxBase::DoGetHelpTextAtPoint(const wxWindow *derived,
 261                                               const wxPoint& pt,
 262                                               wxHelpEvent::Origin origin) const
 263 {
 264     const int item = origin == wxHelpEvent::Origin_HelpButton
 265                         ? GetItemFromPoint(pt)
 266                         : GetSelection();
 267
 268     if ( item != wxNOT_FOUND )
 269     {
 270         wxString text = GetItemHelpText(wx_static_cast(unsigned int, item));
 271         if( !text.empty() )
 272             return text;
 273     }
 274
 275     return derived->wxWindowBase::GetHelpTextAtPoint(pt, origin);
 276 }
 277
 278 #endif // wxUSE_HELP
 279
 280 #endif // wxUSE_RADIOBOX