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