src/common/popupcmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/popupcmn.cpp
   3 // Purpose:     implementation of wxPopupTransientWindow
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     06.01.01
   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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "popupwinbase.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_POPUPWIN
  32
  33 #include "wx/popupwin.h"
  34
  35 #ifndef WX_PRECOMP
  36     #include "wx/combobox.h"        // wxComboControl
  37     #include "wx/app.h"             // wxPostEvent
  38     #include "wx/log.h"
  39     #include "wx/app.h"
  40 #endif //WX_PRECOMP
  41
  42 #ifdef __WXUNIVERSAL__
  43     #include "wx/univ/renderer.h"
  44 #endif // __WXUNIVERSAL__
  45
  46 // there is no src/mgl/popupwin.cpp to put this in, so we do it here - BTW we
  47 // probably could do it for all ports here just as well
  48 #if defined(__WXMGL__)
  49     IMPLEMENT_DYNAMIC_CLASS(wxPopupWindow, wxWindow)
  50 #endif // __WXMSW__
  51
  52 IMPLEMENT_DYNAMIC_CLASS(wxPopupTransientWindow, wxPopupWindow)
  53
  54 #if wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
  55     IMPLEMENT_DYNAMIC_CLASS(wxPopupComboWindow, wxPopupTransientWindow)
  56 #endif
  57
  58 // ----------------------------------------------------------------------------
  59 // private classes
  60 // ----------------------------------------------------------------------------
  61
  62 // event handlers which we use to intercept events which cause the popup to
  63 // disappear
  64 class wxPopupWindowHandler : public wxEvtHandler
  65 {
  66 public:
  67     wxPopupWindowHandler(wxPopupTransientWindow *popup) { m_popup = popup; }
  68
  69 protected:
  70     // event handlers
  71     void OnLeftDown(wxMouseEvent& event);
  72
  73 private:
  74     wxPopupTransientWindow *m_popup;
  75
  76     DECLARE_EVENT_TABLE()
  77     DECLARE_NO_COPY_CLASS(wxPopupWindowHandler)
  78 };
  79
  80 class wxPopupFocusHandler : public wxEvtHandler
  81 {
  82 public:
  83     wxPopupFocusHandler(wxPopupTransientWindow *popup)
  84     {
  85         m_popup = popup;
  86
  87 #ifdef __WXGTK__
  88         // ignore the next few OnKillFocus() calls
  89         m_creationTime = time(NULL);
  90 #endif // __WXGTK__
  91     }
  92
  93 protected:
  94     // event handlers
  95     void OnKillFocus(wxFocusEvent& event);
  96     void OnKeyDown(wxKeyEvent& event);
  97
  98 private:
  99     wxPopupTransientWindow *m_popup;
 100
 101     // hack around wxGTK bug: we always get several kill focus events
 102     // immediately after creation!
 103 #ifdef __WXGTK__
 104     time_t m_creationTime;
 105 #endif // __WXGTK__
 106
 107     DECLARE_EVENT_TABLE()
 108     DECLARE_NO_COPY_CLASS(wxPopupFocusHandler)
 109 };
 110
 111 // ----------------------------------------------------------------------------
 112 // event tables
 113 // ----------------------------------------------------------------------------
 114
 115 BEGIN_EVENT_TABLE(wxPopupWindowHandler, wxEvtHandler)
 116     EVT_LEFT_DOWN(wxPopupWindowHandler::OnLeftDown)
 117 END_EVENT_TABLE()
 118
 119 BEGIN_EVENT_TABLE(wxPopupFocusHandler, wxEvtHandler)
 120     EVT_KILL_FOCUS(wxPopupFocusHandler::OnKillFocus)
 121     EVT_KEY_DOWN(wxPopupFocusHandler::OnKeyDown)
 122 END_EVENT_TABLE()
 123
 124 // ============================================================================
 125 // implementation
 126 // ============================================================================
 127
 128 // ----------------------------------------------------------------------------
 129 // wxPopupWindowBase
 130 // ----------------------------------------------------------------------------
 131
 132 wxPopupWindowBase::~wxPopupWindowBase()
 133 {
 134     // this destructor is required for Darwin
 135 }
 136
 137 bool wxPopupWindowBase::Create(wxWindow* WXUNUSED(parent), int WXUNUSED(flags))
 138 {
 139     return TRUE;
 140 }
 141
 142 void wxPopupWindowBase::Position(const wxPoint& ptOrigin,
 143                                  const wxSize& size)
 144 {
 145     wxSize sizeScreen = wxGetDisplaySize(),
 146            sizeSelf = GetSize();
 147
 148     // is there enough space to put the popup below the window (where we put it
 149     // by default)?
 150     wxCoord y = ptOrigin.y + size.y;
 151     if ( y + sizeSelf.y > sizeScreen.y )
 152     {
 153         // check if there is enough space above
 154         if ( ptOrigin.y > sizeSelf.y )
 155         {
 156             // do position the control above the window
 157             y -= size.y + sizeSelf.y;
 158         }
 159         //else: not enough space below nor above, leave below
 160     }
 161
 162     // now check left/right too
 163     wxCoord x = ptOrigin.x + size.x;
 164     if ( x + sizeSelf.x > sizeScreen.x )
 165     {
 166         // check if there is enough space to the left
 167         if ( ptOrigin.x > sizeSelf.x )
 168         {
 169             // do position the control to the left
 170             x -= size.x + sizeSelf.x;
 171         }
 172         //else: not enough space there neither, leave in default position
 173     }
 174
 175     Move(x, y, wxSIZE_NO_ADJUSTMENTS);
 176 }
 177
 178 // ----------------------------------------------------------------------------
 179 // wxPopupTransientWindow
 180 // ----------------------------------------------------------------------------
 181
 182 void wxPopupTransientWindow::Init()
 183 {
 184     m_child =
 185     m_focus = (wxWindow *)NULL;
 186
 187     m_handlerFocus = NULL;
 188     m_handlerPopup = NULL;
 189 }
 190
 191 wxPopupTransientWindow::wxPopupTransientWindow(wxWindow *parent, int style)
 192 {
 193     Init();
 194
 195     (void)Create(parent, style);
 196 }
 197
 198 wxPopupTransientWindow::~wxPopupTransientWindow()
 199 {
 200     PopHandlers();
 201
 202     delete m_handlerFocus;
 203     delete m_handlerPopup;
 204 }
 205
 206 void wxPopupTransientWindow::PopHandlers()
 207 {
 208     if ( m_child )
 209     {
 210         if ( !m_child->RemoveEventHandler(m_handlerPopup) )
 211         {
 212             // something is very wrong and someone else probably deleted our
 213             // handler - so don't risk deleting it second time
 214             m_handlerPopup = NULL;
 215         }
 216
 217         m_child->ReleaseMouse();
 218         m_child = NULL;
 219     }
 220
 221     if ( m_focus )
 222     {
 223 #ifndef __WXX11__
 224         if ( !m_focus->RemoveEventHandler(m_handlerFocus) )
 225         {
 226             // see above
 227             m_handlerFocus = NULL;
 228         }
 229 #endif
 230         m_focus = NULL;
 231     }
 232 }
 233
 234 void wxPopupTransientWindow::Popup(wxWindow *winFocus)
 235 {
 236     const wxWindowList& children = GetChildren();
 237     if ( children.GetCount() )
 238     {
 239         m_child = children.GetFirst()->GetData();
 240     }
 241     else
 242     {
 243         m_child = this;
 244     }
 245
 246     // we can't capture mouse before the window is shown in wxGTK, so do it
 247     // first
 248     Show();
 249
 250     delete m_handlerPopup;
 251     m_handlerPopup = new wxPopupWindowHandler(this);
 252
 253     m_child->CaptureMouse();
 254     m_child->PushEventHandler(m_handlerPopup);
 255
 256     m_focus = winFocus ? winFocus : this;
 257     m_focus->SetFocus();
 258
 259 #ifndef __WXX11__
 260
 261 #ifdef __WXMSW__
 262     // MSW doesn't allow to set focus to the popup window, but we need to
 263     // subclass the window which has the focus, and not winFocus passed in or
 264     // otherwise everything else breaks down
 265     m_focus = FindFocus();
 266     if ( m_focus )
 267 #endif // __WXMSW__
 268     {
 269         delete m_handlerFocus;
 270         m_handlerFocus = new wxPopupFocusHandler(this);
 271
 272         m_focus->PushEventHandler(m_handlerFocus);
 273     }
 274
 275 #endif // !__WXX11__
 276 }
 277
 278 void wxPopupTransientWindow::Dismiss()
 279 {
 280     PopHandlers();
 281
 282     Hide();
 283 }
 284
 285 void wxPopupTransientWindow::DismissAndNotify()
 286 {
 287     Dismiss();
 288
 289     OnDismiss();
 290 }
 291
 292 void wxPopupTransientWindow::OnDismiss()
 293 {
 294     // nothing to do here - but it may be interesting for derived class
 295 }
 296
 297 bool wxPopupTransientWindow::ProcessLeftDown(wxMouseEvent& WXUNUSED(event))
 298 {
 299     // no special processing here
 300     return FALSE;
 301 }
 302
 303 #if wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
 304
 305 // ----------------------------------------------------------------------------
 306 // wxPopupComboWindow
 307 // ----------------------------------------------------------------------------
 308
 309 BEGIN_EVENT_TABLE(wxPopupComboWindow, wxPopupTransientWindow)
 310     EVT_KEY_DOWN(wxPopupComboWindow::OnKeyDown)
 311 END_EVENT_TABLE()
 312
 313 wxPopupComboWindow::wxPopupComboWindow(wxComboControl *parent)
 314                   : wxPopupTransientWindow(parent)
 315 {
 316     m_combo = parent;
 317 }
 318
 319 bool wxPopupComboWindow::Create(wxComboControl *parent)
 320 {
 321     m_combo = parent;
 322
 323     return wxPopupWindow::Create(parent);
 324 }
 325
 326 void wxPopupComboWindow::PositionNearCombo()
 327 {
 328     // the origin point must be in screen coords
 329     wxPoint ptOrigin = m_combo->ClientToScreen(wxPoint(0, 0));
 330
 331 #if 0 //def __WXUNIVERSAL__
 332     // account for the fact that (0, 0) is not the top left corner of the
 333     // window: there is also the border
 334     wxRect rectBorders = m_combo->GetRenderer()->
 335                             GetBorderDimensions(m_combo->GetBorder());
 336     ptOrigin.x -= rectBorders.x;
 337     ptOrigin.y -= rectBorders.y;
 338 #endif // __WXUNIVERSAL__
 339
 340     // position below or above the combobox: the width is 0 to put it exactly
 341     // below us, not to the left or to the right
 342     Position(ptOrigin, wxSize(0, m_combo->GetSize().y));
 343 }
 344
 345 void wxPopupComboWindow::OnDismiss()
 346 {
 347     m_combo->OnDismiss();
 348 }
 349
 350 void wxPopupComboWindow::OnKeyDown(wxKeyEvent& event)
 351 {
 352     m_combo->ProcessEvent(event);
 353 }
 354
 355 #endif // wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
 356
 357 // ----------------------------------------------------------------------------
 358 // wxPopupWindowHandler
 359 // ----------------------------------------------------------------------------
 360
 361 void wxPopupWindowHandler::OnLeftDown(wxMouseEvent& event)
 362 {
 363     // let the window have it first (we're the first event handler in the chain
 364     // of handlers for this window)
 365     if ( m_popup->ProcessLeftDown(event) )
 366     {
 367         return;
 368     }
 369
 370     wxPoint pos = event.GetPosition();
 371
 372     // scrollbar on which the click occured
 373     wxWindow *sbar = NULL;
 374
 375     wxWindow *win = (wxWindow *)event.GetEventObject();
 376
 377     switch ( win->HitTest(pos.x, pos.y) )
 378     {
 379         case wxHT_WINDOW_OUTSIDE:
 380             {
 381                 // do the coords translation now as after DismissAndNotify()
 382                 // m_popup may be destroyed
 383                 wxMouseEvent event2(event);
 384
 385                 m_popup->ClientToScreen(&event2.m_x, &event2.m_y);
 386
 387                 // clicking outside a popup dismisses it
 388                 m_popup->DismissAndNotify();
 389
 390                 // dismissing a tooltip shouldn't waste a click, i.e. you
 391                 // should be able to dismiss it and press the button with the
 392                 // same click, so repost this event to the window beneath us
 393                 wxWindow *win = wxFindWindowAtPoint(event2.GetPosition());
 394                 if ( win )
 395                 {
 396                     // translate the event coords to the ones of the window
 397                     // which is going to get the event
 398                     win->ScreenToClient(&event2.m_x, &event2.m_y);
 399
 400                     event2.SetEventObject(win);
 401                     wxPostEvent(win, event2);
 402                 }
 403             }
 404             break;
 405
 406 #ifdef __WXUNIVERSAL__
 407         case wxHT_WINDOW_HORZ_SCROLLBAR:
 408             sbar = win->GetScrollbar(wxHORIZONTAL);
 409             break;
 410
 411         case wxHT_WINDOW_VERT_SCROLLBAR:
 412             sbar = win->GetScrollbar(wxVERTICAL);
 413             break;
 414 #endif
 415
 416         default:
 417             // forgot to update the switch after adding a new hit test code?
 418             wxFAIL_MSG( _T("unexpected HitTest() return value") );
 419             // fall through
 420
 421         case wxHT_WINDOW_CORNER:
 422             // don't actually know if this one is good for anything, but let it
 423             // pass just in case
 424
 425         case wxHT_WINDOW_INSIDE:
 426             // let the normal processing take place
 427             event.Skip();
 428             break;
 429     }
 430
 431     if ( sbar )
 432     {
 433         // translate the event coordinates to the scrollbar ones
 434         pos = sbar->ScreenToClient(win->ClientToScreen(pos));
 435
 436         // and give the event to it
 437         wxMouseEvent event2 = event;
 438         event2.m_x = pos.x;
 439         event2.m_y = pos.y;
 440
 441         (void)sbar->GetEventHandler()->ProcessEvent(event2);
 442     }
 443 }
 444
 445 // ----------------------------------------------------------------------------
 446 // wxPopupFocusHandler
 447 // ----------------------------------------------------------------------------
 448
 449 void wxPopupFocusHandler::OnKillFocus(wxFocusEvent& event)
 450 {
 451 #ifdef __WXGTK__
 452     // ignore the next OnKillFocus() call
 453     if ( time(NULL) < m_creationTime + 1 )
 454     {
 455         event.Skip();
 456
 457         return;
 458     }
 459 #endif // __WXGTK__
 460
 461     // when we lose focus we always disappear - unless it goes to the popup (in
 462     // which case we don't really lose it)
 463     wxWindow *win = event.GetWindow();
 464     while ( win )
 465     {
 466         if ( win == m_popup )
 467             return;
 468         win = win->GetParent();
 469     }
 470
 471     m_popup->DismissAndNotify();
 472 }
 473
 474 void wxPopupFocusHandler::OnKeyDown(wxKeyEvent& event)
 475 {
 476     // let the window have it first, it might process the keys
 477     if ( !m_popup->ProcessEvent(event) )
 478     {
 479         // by default, dismiss the popup
 480         m_popup->DismissAndNotify();
 481     }
 482 }
 483
 484 #endif // wxUSE_POPUPWIN
 485