src/univ/checkbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        univ/checkbox.cpp
   3 // Purpose:     wxCheckBox implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     25.08.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "univcheckbox.h"
  22 #endif
  23
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27     #pragma hdrstop
  28 #endif
  29
  30 #if wxUSE_CHECKBOX
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/dcclient.h"
  34     #include "wx/checkbox.h"
  35     #include "wx/validate.h"
  36
  37     #include "wx/button.h" // for wxACTION_BUTTON_XXX
  38 #endif
  39
  40 #include "wx/univ/theme.h"
  41 #include "wx/univ/renderer.h"
  42 #include "wx/univ/inphand.h"
  43 #include "wx/univ/colschem.h"
  44
  45 // ============================================================================
  46 // implementation
  47 // ============================================================================
  48
  49 IMPLEMENT_DYNAMIC_CLASS(wxCheckBox, wxControl)
  50
  51 // ----------------------------------------------------------------------------
  52 // wxCheckBox
  53 // ----------------------------------------------------------------------------
  54
  55 void wxCheckBox::Init()
  56 {
  57     m_isPressed = false;
  58     m_status = Status_Unchecked;
  59 }
  60
  61 bool wxCheckBox::Create(wxWindow *parent,
  62                         wxWindowID id,
  63                         const wxString &label,
  64                         const wxPoint &pos,
  65                         const wxSize &size,
  66                         long style,
  67                         const wxValidator& validator,
  68                         const wxString &name)
  69 {
  70     if ( !wxControl::Create(parent, id, pos, size, style, validator, name) )
  71         return false;
  72
  73     SetLabel(label);
  74     SetBestSize(size);
  75
  76     CreateInputHandler(wxINP_HANDLER_CHECKBOX);
  77
  78     return true;
  79 }
  80
  81 // ----------------------------------------------------------------------------
  82 // checkbox interface
  83 // ----------------------------------------------------------------------------
  84
  85 bool wxCheckBox::GetValue() const
  86 {
  87     return (Get3StateValue() != wxCHK_UNCHECKED);
  88 }
  89
  90 void wxCheckBox::SetValue(bool value)
  91 {
  92     Set3StateValue( value ? wxCHK_CHECKED : wxCHK_UNCHECKED );
  93 }
  94
  95 void wxCheckBox::OnCheck()
  96 {
  97     // we do nothing here
  98 }
  99
 100 // ----------------------------------------------------------------------------
 101 // indicator bitmaps
 102 // ----------------------------------------------------------------------------
 103
 104 wxBitmap wxCheckBox::GetBitmap(State state, Status status) const
 105 {
 106     wxBitmap bmp = m_bitmaps[state][status];
 107     if ( !bmp.Ok() )
 108         bmp = m_bitmaps[State_Normal][status];
 109
 110     return bmp;
 111 }
 112
 113 void wxCheckBox::SetBitmap(const wxBitmap& bmp, State state, Status status)
 114 {
 115     m_bitmaps[state][status] = bmp;
 116 }
 117
 118 // ----------------------------------------------------------------------------
 119 // drawing
 120 // ----------------------------------------------------------------------------
 121
 122 wxCheckBox::State wxCheckBox::GetState(int flags) const
 123 {
 124     if ( flags & wxCONTROL_DISABLED )
 125         return State_Disabled;
 126     else if ( flags & wxCONTROL_PRESSED )
 127         return State_Pressed;
 128     else if ( flags & wxCONTROL_CURRENT )
 129         return State_Current;
 130     else
 131         return State_Normal;
 132 }
 133
 134 void wxCheckBox::DoDraw(wxControlRenderer *renderer)
 135 {
 136     int flags = GetStateFlags();
 137
 138     wxDC& dc = renderer->GetDC();
 139     dc.SetFont(GetFont());
 140     dc.SetTextForeground(GetForegroundColour());
 141
 142     switch ( Get3StateValue() )
 143     {
 144         case wxCHK_CHECKED:      flags |= wxCONTROL_CHECKED;
 145         case wxCHK_UNDETERMINED: flags |= wxCONTROL_UNDETERMINED;
 146     }
 147
 148     wxBitmap bitmap(GetBitmap(GetState(flags), m_status));
 149
 150     renderer->GetRenderer()->
 151         DrawCheckButton(dc,
 152                         GetLabel(),
 153                         bitmap,
 154                         renderer->GetRect(),
 155                         flags,
 156                         GetWindowStyle() & wxALIGN_RIGHT ? wxALIGN_RIGHT
 157                                                          : wxALIGN_LEFT,
 158                         GetAccelIndex());
 159 }
 160
 161 // ----------------------------------------------------------------------------
 162 // geometry calculations
 163 // ----------------------------------------------------------------------------
 164
 165 wxSize wxCheckBox::GetBitmapSize() const
 166 {
 167     wxBitmap bmp = GetBitmap(State_Normal, Status_Checked);
 168     return bmp.Ok() ? wxSize(bmp.GetWidth(), bmp.GetHeight())
 169                     : GetRenderer()->GetCheckBitmapSize();
 170 }
 171
 172 wxSize wxCheckBox::DoGetBestClientSize() const
 173 {
 174     wxClientDC dc(wxConstCast(this, wxCheckBox));
 175     dc.SetFont(GetFont());
 176     wxCoord width, height;
 177     dc.GetMultiLineTextExtent(GetLabel(), &width, &height);
 178
 179     wxSize sizeBmp = GetBitmapSize();
 180     if ( height < sizeBmp.y )
 181         height = sizeBmp.y;
 182
 183 #if wxUNIV_COMPATIBLE_MSW
 184     // this looks better but is different from what wxMSW does
 185     height += GetCharHeight()/2;
 186 #endif // wxUNIV_COMPATIBLE_MSW
 187
 188     width += sizeBmp.x + 2*GetCharWidth();
 189
 190     return wxSize(width, height);
 191 }
 192
 193 // ----------------------------------------------------------------------------
 194 // checkbox actions
 195 // ----------------------------------------------------------------------------
 196
 197 void wxCheckBox::DoSet3StateValue(wxCheckBoxState state)
 198 {
 199     Status status;
 200     switch ( state )
 201     {
 202         case wxCHK_UNCHECKED:    status = Status_Unchecked;   break;
 203         case wxCHK_CHECKED:      status = Status_Checked; break;
 204         default:                 wxFAIL_MSG(_T("Unknown checkbox state"));
 205         case wxCHK_UNDETERMINED: status = Status_3rdState;  break;
 206     }
 207     if ( status != m_status )
 208     {
 209         m_status = status;
 210
 211         if ( m_status == Status_Checked )
 212         {
 213             // invoke the hook
 214             OnCheck();
 215         }
 216
 217         Refresh();
 218     }
 219 }
 220
 221 wxCheckBoxState wxCheckBox::DoGet3StateValue() const
 222 {
 223     switch ( m_status )
 224     {
 225         case Status_Checked:    return wxCHK_CHECKED;
 226         case Status_Unchecked:  return wxCHK_UNCHECKED;
 227     }
 228     return wxCHK_UNDETERMINED;
 229 }
 230
 231 void wxCheckBox::Press()
 232 {
 233     if ( !m_isPressed )
 234     {
 235         m_isPressed = true;
 236
 237         Refresh();
 238     }
 239 }
 240
 241 void wxCheckBox::Release()
 242 {
 243     if ( m_isPressed )
 244     {
 245         m_isPressed = false;
 246
 247         Refresh();
 248     }
 249 }
 250
 251 void wxCheckBox::Toggle()
 252 {
 253     m_isPressed = false;
 254
 255     Status status = m_status;
 256
 257     switch ( Get3StateValue() )
 258     {
 259         case wxCHK_CHECKED:
 260             Set3StateValue(Is3rdStateAllowedForUser() ? wxCHK_UNDETERMINED : wxCHK_UNCHECKED);
 261             break;
 262
 263         case wxCHK_UNCHECKED:
 264             Set3StateValue(wxCHK_CHECKED);
 265             break;
 266
 267         case wxCHK_UNDETERMINED:
 268             Set3StateValue(wxCHK_UNCHECKED);
 269             break;
 270     }
 271
 272     if( status != m_status )
 273         SendEvent();
 274 }
 275
 276 void wxCheckBox::ChangeValue(bool value)
 277 {
 278     SetValue(value);
 279
 280     SendEvent();
 281 }
 282
 283 void wxCheckBox::SendEvent()
 284 {
 285     wxCommandEvent event(wxEVT_COMMAND_CHECKBOX_CLICKED, GetId());
 286     InitCommandEvent(event);
 287     wxCheckBoxState state = Get3StateValue();
 288
 289     // If the style flag to allow the user setting the undetermined state
 290     // is not set, then skip the undetermined state and set it to unchecked.
 291     if ( state == wxCHK_UNDETERMINED && !Is3rdStateAllowedForUser() )
 292     {
 293         state = wxCHK_UNCHECKED;
 294         Set3StateValue(state);
 295     }
 296
 297     event.SetInt(state);
 298     Command(event);
 299 }
 300
 301 // ----------------------------------------------------------------------------
 302 // input handling
 303 // ----------------------------------------------------------------------------
 304
 305 bool wxCheckBox::PerformAction(const wxControlAction& action,
 306                                long numArg,
 307                                const wxString& strArg)
 308 {
 309     if ( action == wxACTION_BUTTON_PRESS )
 310         Press();
 311     else if ( action == wxACTION_BUTTON_RELEASE )
 312         Release();
 313     if ( action == wxACTION_CHECKBOX_CHECK )
 314         ChangeValue(true);
 315     else if ( action == wxACTION_CHECKBOX_CLEAR )
 316         ChangeValue(false);
 317     else if ( action == wxACTION_CHECKBOX_TOGGLE )
 318         Toggle();
 319     else
 320         return wxControl::PerformAction(action, numArg, strArg);
 321
 322     return true;
 323 }
 324
 325 // ----------------------------------------------------------------------------
 326 // wxStdCheckboxInputHandler
 327 // ----------------------------------------------------------------------------
 328
 329 wxStdCheckboxInputHandler::wxStdCheckboxInputHandler(wxInputHandler *inphand)
 330                          : wxStdButtonInputHandler(inphand)
 331 {
 332 }
 333
 334 bool wxStdCheckboxInputHandler::HandleActivation(wxInputConsumer *consumer,
 335                                                  bool WXUNUSED(activated))
 336 {
 337     // only the focused checkbox appearance changes when the app gains/loses
 338     // activation
 339     return consumer->GetInputWindow()->IsFocused();
 340 }
 341
 342 #endif // wxUSE_CHECKBOX