src/msw/checkbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/checkbox.cpp
   3 // Purpose:     wxCheckBox
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     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_CHECKBOX
  28
  29 #include "wx/checkbox.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/brush.h"
  33     #include "wx/dcscreen.h"
  34     #include "wx/settings.h"
  35 #endif
  36
  37 #include "wx/msw/uxtheme.h"
  38 #include "wx/renderer.h"
  39
  40 // ----------------------------------------------------------------------------
  41 // constants
  42 // ----------------------------------------------------------------------------
  43
  44 #ifndef BST_UNCHECKED
  45     #define BST_UNCHECKED 0x0000
  46 #endif
  47
  48 #ifndef BST_CHECKED
  49     #define BST_CHECKED 0x0001
  50 #endif
  51
  52 #ifndef BST_INDETERMINATE
  53     #define BST_INDETERMINATE 0x0002
  54 #endif
  55
  56 #ifndef DT_HIDEPREFIX
  57     #define DT_HIDEPREFIX 0x00100000
  58 #endif
  59
  60 #ifndef BP_CHECKBOX
  61     #define BP_CHECKBOX 3
  62 #endif
  63
  64 // these values are defined in tmschema.h (except the first one)
  65 enum
  66 {
  67     CBS_INVALID,
  68     CBS_UNCHECKEDNORMAL,
  69     CBS_UNCHECKEDHOT,
  70     CBS_UNCHECKEDPRESSED,
  71     CBS_UNCHECKEDDISABLED,
  72     CBS_CHECKEDNORMAL,
  73     CBS_CHECKEDHOT,
  74     CBS_CHECKEDPRESSED,
  75     CBS_CHECKEDDISABLED,
  76     CBS_MIXEDNORMAL,
  77     CBS_MIXEDHOT,
  78     CBS_MIXEDPRESSED,
  79     CBS_MIXEDDISABLED
  80 };
  81
  82 // these are our own
  83 enum
  84 {
  85     CBS_HOT_OFFSET = 1,
  86     CBS_PRESSED_OFFSET = 2,
  87     CBS_DISABLED_OFFSET = 3
  88 };
  89
  90 // ============================================================================
  91 // implementation
  92 // ============================================================================
  93
  94 #if wxUSE_EXTENDED_RTTI
  95 WX_DEFINE_FLAGS( wxCheckBoxStyle )
  96
  97 wxBEGIN_FLAGS( wxCheckBoxStyle )
  98     // new style border flags, we put them first to
  99     // use them for streaming out
 100     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 101     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 102     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 103     wxFLAGS_MEMBER(wxBORDER_RAISED)
 104     wxFLAGS_MEMBER(wxBORDER_STATIC)
 105     wxFLAGS_MEMBER(wxBORDER_NONE)
 106
 107     // old style border flags
 108     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 109     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 110     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 111     wxFLAGS_MEMBER(wxRAISED_BORDER)
 112     wxFLAGS_MEMBER(wxSTATIC_BORDER)
 113     wxFLAGS_MEMBER(wxNO_BORDER)
 114
 115     // standard window styles
 116     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 117     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 118     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 119     wxFLAGS_MEMBER(wxWANTS_CHARS)
 120     wxFLAGS_MEMBER(wxNO_FULL_REPAINT_ON_RESIZE)
 121     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 122     wxFLAGS_MEMBER(wxVSCROLL)
 123     wxFLAGS_MEMBER(wxHSCROLL)
 124
 125 wxEND_FLAGS( wxCheckBoxStyle )
 126
 127 IMPLEMENT_DYNAMIC_CLASS_XTI(wxCheckBox, wxControl,"wx/checkbox.h")
 128
 129 wxBEGIN_PROPERTIES_TABLE(wxCheckBox)
 130     wxEVENT_PROPERTY( Click , wxEVT_COMMAND_CHECKBOX_CLICKED , wxCommandEvent )
 131
 132     wxPROPERTY( Font , wxFont , SetFont , GetFont , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 133     wxPROPERTY( Label,wxString, SetLabel, GetLabel, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 134     wxPROPERTY( Value ,bool, SetValue, GetValue, EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 135     wxPROPERTY_FLAGS( WindowStyle , wxCheckBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 136 wxEND_PROPERTIES_TABLE()
 137
 138 wxBEGIN_HANDLERS_TABLE(wxCheckBox)
 139 wxEND_HANDLERS_TABLE()
 140
 141 wxCONSTRUCTOR_6( wxCheckBox , wxWindow* , Parent , wxWindowID , Id , wxString , Label , wxPoint , Position , wxSize , Size , long , WindowStyle )
 142 #else
 143 IMPLEMENT_DYNAMIC_CLASS(wxCheckBox, wxControl)
 144 #endif
 145
 146
 147 // ----------------------------------------------------------------------------
 148 // wxCheckBox creation
 149 // ----------------------------------------------------------------------------
 150
 151 void wxCheckBox::Init()
 152 {
 153     m_state = wxCHK_UNCHECKED;
 154     m_isPressed =
 155     m_isHot = false;
 156 }
 157
 158 bool wxCheckBox::Create(wxWindow *parent,
 159                         wxWindowID id,
 160                         const wxString& label,
 161                         const wxPoint& pos,
 162                         const wxSize& size, long style,
 163                         const wxValidator& validator,
 164                         const wxString& name)
 165 {
 166     Init();
 167
 168     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 169         return false;
 170
 171     long msStyle = WS_TABSTOP;
 172
 173     if ( style & wxCHK_3STATE )
 174     {
 175         msStyle |= BS_3STATE;
 176     }
 177     else
 178     {
 179         wxASSERT_MSG( !Is3rdStateAllowedForUser(),
 180             wxT("Using wxCH_ALLOW_3RD_STATE_FOR_USER")
 181             wxT(" style flag for a 2-state checkbox is useless") );
 182         msStyle |= BS_CHECKBOX;
 183     }
 184
 185     if ( style & wxALIGN_RIGHT )
 186     {
 187         msStyle |= BS_LEFTTEXT | BS_RIGHT;
 188     }
 189
 190     return MSWCreateControl(wxT("BUTTON"), msStyle, pos, size, label, 0);
 191 }
 192
 193 // ----------------------------------------------------------------------------
 194 // wxCheckBox geometry
 195 // ----------------------------------------------------------------------------
 196
 197 wxSize wxCheckBox::DoGetBestSize() const
 198 {
 199     static int s_checkSize = 0;
 200
 201     if ( !s_checkSize )
 202     {
 203         wxScreenDC dc;
 204         dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 205
 206         s_checkSize = dc.GetCharHeight();
 207     }
 208
 209     wxString str = wxGetWindowText(GetHWND());
 210
 211     int wCheckbox, hCheckbox;
 212     if ( !str.empty() )
 213     {
 214         GetTextExtent(GetLabelText(str), &wCheckbox, &hCheckbox);
 215         wCheckbox += s_checkSize + GetCharWidth();
 216
 217         if ( hCheckbox < s_checkSize )
 218             hCheckbox = s_checkSize;
 219     }
 220     else
 221     {
 222         wCheckbox = s_checkSize;
 223         hCheckbox = s_checkSize;
 224     }
 225 #ifdef __WXWINCE__
 226     hCheckbox += 1;
 227 #endif
 228
 229     wxSize best(wCheckbox, hCheckbox);
 230     CacheBestSize(best);
 231     return best;
 232 }
 233
 234 // ----------------------------------------------------------------------------
 235 // wxCheckBox operations
 236 // ----------------------------------------------------------------------------
 237
 238 void wxCheckBox::SetValue(bool val)
 239 {
 240     Set3StateValue(val ? wxCHK_CHECKED : wxCHK_UNCHECKED);
 241 }
 242
 243 bool wxCheckBox::GetValue() const
 244 {
 245     return Get3StateValue() != wxCHK_UNCHECKED;
 246 }
 247
 248 void wxCheckBox::Command(wxCommandEvent& event)
 249 {
 250     int state = event.GetInt();
 251     wxCHECK_RET( (state == wxCHK_UNCHECKED) || (state == wxCHK_CHECKED)
 252         || (state == wxCHK_UNDETERMINED),
 253         wxT("event.GetInt() returned an invalid checkbox state") );
 254
 255     Set3StateValue((wxCheckBoxState) state);
 256     ProcessCommand(event);
 257 }
 258
 259 wxCOMPILE_TIME_ASSERT(wxCHK_UNCHECKED == BST_UNCHECKED
 260     && wxCHK_CHECKED == BST_CHECKED
 261     && wxCHK_UNDETERMINED == BST_INDETERMINATE, EnumValuesIncorrect);
 262
 263 void wxCheckBox::DoSet3StateValue(wxCheckBoxState state)
 264 {
 265     m_state = state;
 266     if ( !IsOwnerDrawn() )
 267         ::SendMessage(GetHwnd(), BM_SETCHECK, (WPARAM) state, 0);
 268     else // owner drawn buttons don't react to this message
 269         Refresh();
 270 }
 271
 272 wxCheckBoxState wxCheckBox::DoGet3StateValue() const
 273 {
 274     return m_state;
 275 }
 276
 277 bool wxCheckBox::MSWCommand(WXUINT cmd, WXWORD WXUNUSED(id))
 278 {
 279     if ( cmd != BN_CLICKED && cmd != BN_DBLCLK )
 280         return false;
 281
 282     // first update the value so that user event handler gets the new checkbox
 283     // value
 284
 285     // ownerdrawn buttons don't manage their state themselves unlike usual
 286     // auto checkboxes so do it ourselves in any case
 287     wxCheckBoxState state;
 288     if ( Is3rdStateAllowedForUser() )
 289     {
 290         state = (wxCheckBoxState)((m_state + 1) % 3);
 291     }
 292     else // 2 state checkbox (at least from users point of view)
 293     {
 294         // note that wxCHK_UNDETERMINED also becomes unchecked when clicked
 295         state = m_state == wxCHK_UNCHECKED ? wxCHK_CHECKED : wxCHK_UNCHECKED;
 296     }
 297
 298     DoSet3StateValue(state);
 299
 300
 301     // generate the event
 302     wxCommandEvent event(wxEVT_COMMAND_CHECKBOX_CLICKED, m_windowId);
 303
 304     event.SetInt(state);
 305     event.SetEventObject(this);
 306     ProcessCommand(event);
 307
 308     return true;
 309 }
 310
 311 // ----------------------------------------------------------------------------
 312 // owner drawn checkboxes stuff
 313 // ----------------------------------------------------------------------------
 314
 315 bool wxCheckBox::SetForegroundColour(const wxColour& colour)
 316 {
 317     if ( !wxCheckBoxBase::SetForegroundColour(colour) )
 318         return false;
 319
 320     // the only way to change the checkbox foreground colour under Windows XP
 321     // is to owner draw it
 322     if ( wxUxThemeEngine::GetIfActive() )
 323         MakeOwnerDrawn(colour.Ok());
 324
 325     return true;
 326 }
 327
 328 bool wxCheckBox::IsOwnerDrawn() const
 329 {
 330     return
 331         (::GetWindowLong(GetHwnd(), GWL_STYLE) & BS_OWNERDRAW) == BS_OWNERDRAW;
 332 }
 333
 334 void wxCheckBox::MakeOwnerDrawn(bool ownerDrawn)
 335 {
 336     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 337
 338     // note that BS_CHECKBOX & BS_OWNERDRAW != 0 so we can't operate on
 339     // them as on independent style bits
 340     if ( ownerDrawn )
 341     {
 342         style &= ~(BS_CHECKBOX | BS_3STATE);
 343         style |= BS_OWNERDRAW;
 344
 345         Connect(wxEVT_ENTER_WINDOW,
 346                 wxMouseEventHandler(wxCheckBox::OnMouseEnterOrLeave));
 347         Connect(wxEVT_LEAVE_WINDOW,
 348                 wxMouseEventHandler(wxCheckBox::OnMouseEnterOrLeave));
 349         Connect(wxEVT_LEFT_DOWN, wxMouseEventHandler(wxCheckBox::OnMouseLeft));
 350         Connect(wxEVT_LEFT_UP, wxMouseEventHandler(wxCheckBox::OnMouseLeft));
 351         Connect(wxEVT_SET_FOCUS, wxFocusEventHandler(wxCheckBox::OnFocus));
 352         Connect(wxEVT_KILL_FOCUS, wxFocusEventHandler(wxCheckBox::OnFocus));
 353     }
 354     else // reset to default colour
 355     {
 356         style &= ~BS_OWNERDRAW;
 357         style |= HasFlag(wxCHK_3STATE) ? BS_3STATE : BS_CHECKBOX;
 358
 359         Disconnect(wxEVT_ENTER_WINDOW,
 360                    wxMouseEventHandler(wxCheckBox::OnMouseEnterOrLeave));
 361         Disconnect(wxEVT_LEAVE_WINDOW,
 362                    wxMouseEventHandler(wxCheckBox::OnMouseEnterOrLeave));
 363         Disconnect(wxEVT_LEFT_DOWN, wxMouseEventHandler(wxCheckBox::OnMouseLeft));
 364         Disconnect(wxEVT_LEFT_UP, wxMouseEventHandler(wxCheckBox::OnMouseLeft));
 365         Disconnect(wxEVT_SET_FOCUS, wxFocusEventHandler(wxCheckBox::OnFocus));
 366         Disconnect(wxEVT_KILL_FOCUS, wxFocusEventHandler(wxCheckBox::OnFocus));
 367     }
 368
 369     ::SetWindowLong(GetHwnd(), GWL_STYLE, style);
 370
 371     if ( !ownerDrawn )
 372     {
 373         // ensure that controls state is consistent with internal state
 374         DoSet3StateValue(m_state);
 375     }
 376 }
 377
 378 void wxCheckBox::OnMouseEnterOrLeave(wxMouseEvent& event)
 379 {
 380     m_isHot = event.GetEventType() == wxEVT_ENTER_WINDOW;
 381     if ( !m_isHot )
 382         m_isPressed = false;
 383
 384     Refresh();
 385
 386     event.Skip();
 387 }
 388
 389 void wxCheckBox::OnMouseLeft(wxMouseEvent& event)
 390 {
 391     // TODO: we should capture the mouse here to be notified about left up
 392     //       event but this interferes with BN_CLICKED generation so if we
 393     //       want to do this we'd need to generate them ourselves
 394     m_isPressed = event.GetEventType() == wxEVT_LEFT_DOWN;
 395     Refresh();
 396
 397     event.Skip();
 398 }
 399
 400 void wxCheckBox::OnFocus(wxFocusEvent& event)
 401 {
 402     Refresh();
 403
 404     event.Skip();
 405 }
 406
 407 bool wxCheckBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 408 {
 409     DRAWITEMSTRUCT *dis = (DRAWITEMSTRUCT *)item;
 410
 411     if ( !IsOwnerDrawn() || dis->CtlType != ODT_BUTTON )
 412         return wxCheckBoxBase::MSWOnDraw(item);
 413
 414     // calculate the rectangles for the check mark itself and the label
 415     HDC hdc = dis->hDC;
 416     RECT& rect = dis->rcItem;
 417     RECT rectCheck,
 418          rectLabel;
 419     rectCheck.top =
 420     rectLabel.top = rect.top;
 421     rectCheck.bottom =
 422     rectLabel.bottom = rect.bottom;
 423     const int checkSize = GetBestSize().y;
 424     const int MARGIN = 3;
 425
 426     const bool isRightAligned = HasFlag(wxALIGN_RIGHT);
 427     if ( isRightAligned )
 428     {
 429         rectCheck.right = rect.right;
 430         rectCheck.left = rectCheck.right - checkSize;
 431
 432         rectLabel.right = rectCheck.left - MARGIN;
 433         rectLabel.left = rect.left;
 434     }
 435     else // normal, left-aligned checkbox
 436     {
 437         rectCheck.left = rect.left;
 438         rectCheck.right = rectCheck.left + checkSize;
 439
 440         rectLabel.left = rectCheck.right + MARGIN;
 441         rectLabel.right = rect.right;
 442     }
 443
 444     // show we draw a focus rect?
 445     const bool isFocused = m_isPressed || FindFocus() == this;
 446
 447
 448     // draw the checkbox itself
 449     wxDCTemp dc(hdc);
 450
 451     int flags = 0;
 452     if ( !IsEnabled() )
 453         flags |= wxCONTROL_DISABLED;
 454     switch ( Get3StateValue() )
 455     {
 456         case wxCHK_CHECKED:
 457             flags |= wxCONTROL_CHECKED;
 458             break;
 459
 460         case wxCHK_UNDETERMINED:
 461             flags |= wxCONTROL_PRESSED;
 462             break;
 463
 464         default:
 465             wxFAIL_MSG( _T("unexpected Get3StateValue() return value") );
 466             // fall through
 467
 468         case wxCHK_UNCHECKED:
 469             // no extra styles needed
 470             break;
 471     }
 472
 473     if ( wxFindWindowAtPoint(wxGetMousePosition()) == this )
 474         flags |= wxCONTROL_CURRENT;
 475
 476     wxRendererNative::Get().
 477         DrawCheckBox(this, dc, wxRectFromRECT(rectCheck), flags);
 478
 479     // draw the text
 480     const wxString& label = GetLabel();
 481
 482     // first we need to measure it
 483     UINT fmt = DT_NOCLIP;
 484
 485     // drawing underlying doesn't look well with focus rect (and the native
 486     // control doesn't do it)
 487     if ( isFocused )
 488         fmt |= DT_HIDEPREFIX;
 489     if ( isRightAligned )
 490         fmt |= DT_RIGHT;
 491     // TODO: also use DT_HIDEPREFIX if the system is configured so
 492
 493     // we need to get the label real size first if we have to draw a focus rect
 494     // around it
 495     if ( isFocused )
 496     {
 497         if ( !::DrawText(hdc, label, label.length(), &rectLabel,
 498                          fmt | DT_CALCRECT) )
 499         {
 500             wxLogLastError(_T("DrawText(DT_CALCRECT)"));
 501         }
 502     }
 503
 504     if ( !IsEnabled() )
 505     {
 506         ::SetTextColor(hdc, ::GetSysColor(COLOR_GRAYTEXT));
 507     }
 508
 509     if ( !::DrawText(hdc, label, label.length(), &rectLabel, fmt) )
 510     {
 511         wxLogLastError(_T("DrawText()"));
 512     }
 513
 514     // finally draw the focus
 515     if ( isFocused )
 516     {
 517         rectLabel.left--;
 518         rectLabel.right++;
 519         if ( !::DrawFocusRect(hdc, &rectLabel) )
 520         {
 521             wxLogLastError(_T("DrawFocusRect()"));
 522         }
 523     }
 524
 525     return true;
 526 }
 527
 528 #endif // wxUSE_CHECKBOX