src/common/event.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        event.cpp
   3 // Purpose:     Event classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "event.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/defs.h"
  25 #include "wx/control.h"
  26 #include "wx/utils.h"
  27 #include "wx/app.h"
  28 #include "wx/dc.h"
  29 #endif
  30
  31 #include "wx/event.h"
  32 #include "wx/validate.h"
  33
  34 #if !USE_SHARED_LIBRARY
  35 IMPLEMENT_DYNAMIC_CLASS(wxEvtHandler, wxObject)
  36 IMPLEMENT_ABSTRACT_CLASS(wxEvent, wxObject)
  37 IMPLEMENT_DYNAMIC_CLASS(wxCommandEvent, wxEvent)
  38 IMPLEMENT_DYNAMIC_CLASS(wxScrollEvent, wxCommandEvent)
  39 IMPLEMENT_DYNAMIC_CLASS(wxMouseEvent, wxEvent)
  40 IMPLEMENT_DYNAMIC_CLASS(wxKeyEvent, wxEvent)
  41 IMPLEMENT_DYNAMIC_CLASS(wxSizeEvent, wxEvent)
  42 IMPLEMENT_DYNAMIC_CLASS(wxPaintEvent, wxEvent)
  43 IMPLEMENT_DYNAMIC_CLASS(wxEraseEvent, wxEvent)
  44 IMPLEMENT_DYNAMIC_CLASS(wxMoveEvent, wxEvent)
  45 IMPLEMENT_DYNAMIC_CLASS(wxFocusEvent, wxEvent)
  46 IMPLEMENT_DYNAMIC_CLASS(wxCloseEvent, wxEvent)
  47 IMPLEMENT_DYNAMIC_CLASS(wxShowEvent, wxEvent)
  48 IMPLEMENT_DYNAMIC_CLASS(wxMaximizeEvent, wxEvent)
  49 IMPLEMENT_DYNAMIC_CLASS(wxIconizeEvent, wxEvent)
  50 IMPLEMENT_DYNAMIC_CLASS(wxMenuEvent, wxEvent)
  51 IMPLEMENT_DYNAMIC_CLASS(wxJoystickEvent, wxEvent)
  52 IMPLEMENT_DYNAMIC_CLASS(wxDropFilesEvent, wxEvent)
  53 IMPLEMENT_DYNAMIC_CLASS(wxActivateEvent, wxEvent)
  54 IMPLEMENT_DYNAMIC_CLASS(wxInitDialogEvent, wxEvent)
  55 IMPLEMENT_DYNAMIC_CLASS(wxSysColourChangedEvent, wxEvent)
  56 IMPLEMENT_DYNAMIC_CLASS(wxIdleEvent, wxEvent)
  57 IMPLEMENT_DYNAMIC_CLASS(wxUpdateUIEvent, wxCommandEvent)
  58 IMPLEMENT_DYNAMIC_CLASS(wxNavigationKeyEvent, wxCommandEvent)
  59 IMPLEMENT_DYNAMIC_CLASS(wxPaletteChangedEvent, wxEvent)
  60 IMPLEMENT_DYNAMIC_CLASS(wxQueryNewPaletteEvent, wxEvent)
  61
  62 const wxEventTable *wxEvtHandler::GetEventTable() const { return &wxEvtHandler::sm_eventTable; }
  63
  64 const wxEventTable wxEvtHandler::sm_eventTable =
  65         { (const wxEventTable *) NULL, &wxEvtHandler::sm_eventTableEntries[0] };
  66
  67 const wxEventTableEntry wxEvtHandler::sm_eventTableEntries[] = { { 0, 0, 0,
  68 #ifdef __SGI_CC__
  69 // stupid SGI compiler --- offer aug 98
  70         0L }
  71 #else
  72         NULL }
  73 #endif
  74 };
  75
  76 #endif
  77
  78 /*
  79  * General wxWindows events, covering
  80  * all interesting things that might happen (button clicking, resizing,
  81  * setting text in widgets, etc.).
  82  *
  83  * For each completely new event type, derive a new event class.
  84  *
  85  */
  86
  87 wxEvent::wxEvent(int theId)
  88 {
  89   m_eventType = wxEVT_NULL;
  90   m_eventObject = (wxObject *) NULL;
  91   m_eventHandle = (char *) NULL;
  92   m_timeStamp = 0;
  93   m_id = theId;
  94   m_skipped = FALSE;
  95   m_callbackUserData = (wxObject *) NULL;
  96 }
  97
  98 /*
  99  * Command events
 100  *
 101  */
 102
 103 wxCommandEvent::wxCommandEvent(wxEventType commandType, int theId)
 104 {
 105   m_eventType = commandType;
 106   m_clientData = (char *) NULL;
 107   m_extraLong = 0;
 108   m_commandInt = 0;
 109   m_id = theId;
 110   m_commandString = (char *) NULL;
 111 }
 112
 113 /*
 114  * Scroll events
 115  */
 116
 117 wxScrollEvent::wxScrollEvent(wxEventType commandType, int id, int pos, int orient):
 118   wxCommandEvent(commandType, id)
 119 {
 120   m_extraLong = orient;
 121   m_commandInt = pos;
 122 }
 123
 124
 125 /*
 126  * Mouse events
 127  *
 128  */
 129
 130 wxMouseEvent::wxMouseEvent(wxEventType commandType)
 131 {
 132   m_eventType = commandType;
 133   m_metaDown = FALSE;
 134   m_altDown = FALSE;
 135   m_controlDown = FALSE;
 136   m_shiftDown = FALSE;
 137   m_leftDown = FALSE;
 138   m_rightDown = FALSE;
 139   m_middleDown = FALSE;
 140   m_x = 0;
 141   m_y = 0;
 142 }
 143
 144 // True if was a button dclick event (1 = left, 2 = middle, 3 = right)
 145 // or any button dclick event (but = -1)
 146 bool wxMouseEvent::ButtonDClick(int but) const
 147 {
 148   switch (but) {
 149     case -1:
 150       return (LeftDClick() || MiddleDClick() || RightDClick());
 151     case 1:
 152       return LeftDClick();
 153     case 2:
 154       return MiddleDClick();
 155     case 3:
 156       return RightDClick();
 157     default:
 158       return FALSE;
 159   }
 160   // NOTREACHED
 161 }
 162
 163 // True if was a button down event (1 = left, 2 = middle, 3 = right)
 164 // or any button down event (but = -1)
 165 bool wxMouseEvent::ButtonDown(int but) const
 166 {
 167   switch (but) {
 168     case -1:
 169       return (LeftDown() || MiddleDown() || RightDown());
 170     case 1:
 171       return LeftDown();
 172     case 2:
 173       return MiddleDown();
 174     case 3:
 175       return RightDown();
 176     default:
 177       return FALSE;
 178   }
 179   // NOTREACHED
 180 }
 181
 182 // True if was a button up event (1 = left, 2 = middle, 3 = right)
 183 // or any button up event (but = -1)
 184 bool wxMouseEvent::ButtonUp(int but) const
 185 {
 186   switch (but) {
 187     case -1:
 188       return (LeftUp() || MiddleUp() || RightUp());
 189     case 1:
 190       return LeftUp();
 191     case 2:
 192       return MiddleUp();
 193     case 3:
 194       return RightUp();
 195     default:
 196       return FALSE;
 197   }
 198   // NOTREACHED
 199 }
 200
 201 // True if the given button is currently changing state
 202 bool wxMouseEvent::Button(int but) const
 203 {
 204   switch (but) {
 205     case -1:
 206       return (ButtonUp(-1) || ButtonDown(-1) || ButtonDClick(-1)) ;
 207     case 1:
 208       return (LeftDown() || LeftUp() || LeftDClick());
 209     case 2:
 210       return (MiddleDown() || MiddleUp() || MiddleDClick());
 211     case 3:
 212       return (RightDown() || RightUp() || RightDClick());
 213     default:
 214       return FALSE;
 215   }
 216   // NOTREACHED
 217 }
 218
 219 bool wxMouseEvent::ButtonIsDown(int but) const
 220 {
 221   switch (but) {
 222     case -1:
 223       return (LeftIsDown() || MiddleIsDown() || RightIsDown());
 224     case 1:
 225       return LeftIsDown();
 226     case 2:
 227       return MiddleIsDown();
 228     case 3:
 229       return RightIsDown();
 230     default:
 231       return FALSE;
 232   }
 233   // NOTREACHED
 234 }
 235
 236 // Find the logical position of the event given the DC
 237 wxPoint wxMouseEvent::GetLogicalPosition(const wxDC& dc) const
 238 {
 239     wxPoint pt(dc.DeviceToLogicalX(m_x), dc.DeviceToLogicalY(m_y));
 240     return pt;
 241 }
 242
 243
 244 /*
 245  * Keyboard events
 246  *
 247  */
 248
 249 wxKeyEvent::wxKeyEvent(wxEventType type)
 250 {
 251   m_eventType = type;
 252   m_shiftDown = FALSE;
 253   m_controlDown = FALSE;
 254   m_metaDown = FALSE;
 255   m_altDown = FALSE;
 256   m_keyCode = 0;
 257 }
 258
 259 /*
 260  * Event handler
 261  */
 262
 263 wxEvtHandler::wxEvtHandler(void)
 264 {
 265   m_clientData = (char *) NULL;
 266   m_nextHandler = (wxEvtHandler *) NULL;
 267   m_previousHandler = (wxEvtHandler *) NULL;
 268   m_enabled = TRUE;
 269   m_dynamicEvents = (wxList *) NULL;
 270 }
 271
 272 wxEvtHandler::~wxEvtHandler(void)
 273 {
 274   // Takes itself out of the list of handlers
 275   if (m_previousHandler)
 276     m_previousHandler->m_nextHandler = m_nextHandler;
 277
 278   if (m_nextHandler)
 279     m_nextHandler->m_previousHandler = m_previousHandler;
 280
 281   if (m_dynamicEvents)
 282   {
 283     wxNode *node = m_dynamicEvents->First();
 284     while (node)
 285     {
 286       wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 287       if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 288       delete entry;
 289       node = node->Next();
 290     }
 291     delete m_dynamicEvents;
 292   };
 293 }
 294
 295 /*
 296  * Event table stuff
 297  */
 298
 299 bool wxEvtHandler::ProcessEvent(wxEvent& event)
 300 {
 301   // An event handler can be enabled or disabled
 302   if ( GetEvtHandlerEnabled() )
 303   {
 304     // Handle per-instance dynamic event tables first
 305
 306     if (SearchDynamicEventTable( event )) return TRUE;
 307
 308     // Then static per-class event tables
 309
 310     const wxEventTable *table = GetEventTable();
 311
 312     // Try the associated validator first, if this is a window.
 313     // Problem: if the event handler of the window has been replaced,
 314     // this wxEvtHandler may no longer be a window.
 315     // Therefore validators won't be processed if the handler
 316     // has been replaced with SetEventHandler.
 317     // THIS CAN BE CURED if PushEventHandler is used instead of
 318     // SetEventHandler, and then processing will be passed down the
 319     // chain of event handlers.
 320     if (IsKindOf(CLASSINFO(wxWindow)))
 321     {
 322         wxWindow *win = (wxWindow *)this;
 323
 324       // Can only use the validator of the window which
 325       // is receiving the event
 326       if ( (win == event.GetEventObject()) &&
 327           win->GetValidator() &&
 328           win->GetValidator()->ProcessEvent(event))
 329             return TRUE;
 330     }
 331
 332     // Search upwards through the inheritance hierarchy
 333     while (table)
 334     {
 335       if (SearchEventTable((wxEventTable&)*table, event))
 336           return TRUE;
 337       table = table->baseTable;
 338     }
 339   }
 340
 341   // Try going down the event handler chain
 342   if ( GetNextHandler() )
 343   {
 344         if ( GetNextHandler()->ProcessEvent(event) )
 345             return TRUE;
 346   }
 347
 348   // Carry on up the parent-child hierarchy,
 349   // but only if event is a command event: it wouldn't
 350   // make sense for a parent to receive a child's size event, for example
 351   if (IsKindOf(CLASSINFO(wxWindow)) && event.IsKindOf(CLASSINFO(wxCommandEvent)))
 352   {
 353     wxWindow *win = (wxWindow *)this;
 354     wxWindow *parent = win->GetParent();
 355     if (parent && !parent->IsBeingDeleted())
 356       return win->GetParent()->GetEventHandler()->ProcessEvent(event);
 357   }
 358
 359   // Last try - application object.
 360   // Special case: don't pass wxEVT_IDLE to wxApp, since it'll always swallow it.
 361   // wxEVT_IDLE is sent explicitly to wxApp so it will be processed appropriately
 362   // via SearchEventTable.
 363   if (wxTheApp && this != wxTheApp && (event.GetEventType() != wxEVT_IDLE) && wxTheApp->ProcessEvent(event))
 364     return TRUE;
 365   else
 366     return FALSE;
 367 }
 368
 369 bool wxEvtHandler::SearchEventTable(wxEventTable& table, wxEvent& event)
 370 {
 371   int i = 0;
 372   int commandId = event.GetId();
 373
 374   while (table.entries[i].m_fn !=
 375 #ifdef __SGI_CC__
 376                                                                 0L
 377 #else
 378                                                                 NULL
 379 #endif
 380                 )
 381   {
 382 //    wxEventType eventType = (wxEventType) table.entries[i].m_eventType;
 383
 384     if ((event.GetEventType() == table.entries[i].m_eventType) &&
 385         (table.entries[i].m_id == -1 || // Match, if event spec says any id will do (id == -1)
 386           (table.entries[i].m_lastId == -1 && commandId == table.entries[i].m_id) ||
 387           (table.entries[i].m_lastId != -1 &&
 388             (commandId >= table.entries[i].m_id && commandId <= table.entries[i].m_lastId))))
 389     {
 390           event.Skip(FALSE);
 391                 event.m_callbackUserData = table.entries[i].m_callbackUserData;
 392
 393         (this->*((wxEventFunction) (table.entries[i].m_fn)))(event);
 394
 395         if ( event.GetSkipped() )
 396             return FALSE;
 397           else
 398             return TRUE;
 399     }
 400     i ++;
 401   }
 402   return FALSE;
 403 }
 404
 405 void wxEvtHandler::Connect( int id, int lastId,
 406                             int eventType,
 407                     wxObjectEventFunction func,
 408                     wxObject *userData )
 409 {
 410   wxEventTableEntry *entry = new wxEventTableEntry;
 411   entry->m_id = id;
 412   entry->m_lastId = lastId;
 413   entry->m_eventType = eventType;
 414   entry->m_fn = func;
 415   entry->m_callbackUserData = userData;
 416
 417   if (!m_dynamicEvents)
 418     m_dynamicEvents = new wxList;
 419
 420   m_dynamicEvents->Append( (wxObject*) entry );
 421 }
 422
 423 bool wxEvtHandler::SearchDynamicEventTable( wxEvent& event )
 424 {
 425   if (!m_dynamicEvents) return FALSE;
 426
 427   int commandId = event.GetId();
 428
 429   wxNode *node = m_dynamicEvents->First();
 430   while (node)
 431   {
 432     wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 433
 434 //    wxEventType eventType = (wxEventType) entry->m_eventType;
 435
 436     if (entry->m_fn)
 437     {
 438     if ((event.GetEventType() == entry->m_eventType) &&
 439         (entry->m_id == -1 ||     // Match, if event spec says any id will do (id == -1)
 440         (entry->m_lastId == -1 && commandId == entry->m_id) ||
 441         (entry->m_lastId != -1 &&
 442         (commandId >= entry->m_id && commandId <= entry->m_lastId))))
 443        {
 444       event.Skip(FALSE);
 445           event.m_callbackUserData = entry->m_callbackUserData;
 446
 447           (this->*((wxEventFunction) (entry->m_fn)))(event);
 448
 449       if (event.GetSkipped())
 450         return FALSE;
 451       else
 452             return TRUE;
 453        }
 454     };
 455     node = node->Next();
 456   }
 457   return FALSE;
 458 };
 459
 460 bool wxEvtHandler::OnClose(void)
 461 {
 462     if (GetNextHandler()) return GetNextHandler()->OnClose();
 463     else return FALSE;
 464 }
 465
 466