src/common/popupcmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/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 // 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_POPUPWIN
  28
  29 #include "wx/popupwin.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/combobox.h"        // wxComboCtrl
  33     #include "wx/app.h"             // wxPostEvent
  34     #include "wx/log.h"
  35 #endif //WX_PRECOMP
  36
  37 #include "wx/display.h"
  38 #include "wx/recguard.h"
  39
  40 #ifdef __WXUNIVERSAL__
  41     #include "wx/univ/renderer.h"
  42     #include "wx/scrolbar.h"
  43 #endif // __WXUNIVERSAL__
  44
  45 #ifdef __WXGTK__
  46     #include <gtk/gtk.h>
  47 #elif defined(__WXMSW__)
  48     #include "wx/msw/private.h"
  49 #elif defined(__WXX11__)
  50     #include "wx/x11/private.h"
  51 #endif
  52
  53 IMPLEMENT_DYNAMIC_CLASS(wxPopupWindow, wxWindow)
  54 IMPLEMENT_DYNAMIC_CLASS(wxPopupTransientWindow, wxPopupWindow)
  55
  56 #if wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
  57     IMPLEMENT_DYNAMIC_CLASS(wxPopupComboWindow, wxPopupTransientWindow)
  58 #endif
  59
  60 // ----------------------------------------------------------------------------
  61 // private classes
  62 // ----------------------------------------------------------------------------
  63
  64 // event handlers which we use to intercept events which cause the popup to
  65 // disappear
  66 class wxPopupWindowHandler : public wxEvtHandler
  67 {
  68 public:
  69     wxPopupWindowHandler(wxPopupTransientWindow *popup) : m_popup(popup) {}
  70
  71 protected:
  72     // event handlers
  73     void OnLeftDown(wxMouseEvent& event);
  74
  75 private:
  76     wxPopupTransientWindow *m_popup;
  77
  78     DECLARE_EVENT_TABLE()
  79     wxDECLARE_NO_COPY_CLASS(wxPopupWindowHandler);
  80 };
  81
  82 class wxPopupFocusHandler : public wxEvtHandler
  83 {
  84 public:
  85     wxPopupFocusHandler(wxPopupTransientWindow *popup) : m_popup(popup) {}
  86
  87 protected:
  88     void OnKillFocus(wxFocusEvent& event);
  89     void OnKeyDown(wxKeyEvent& event);
  90
  91 private:
  92     wxPopupTransientWindow *m_popup;
  93
  94     DECLARE_EVENT_TABLE()
  95     wxDECLARE_NO_COPY_CLASS(wxPopupFocusHandler);
  96 };
  97
  98 // ----------------------------------------------------------------------------
  99 // event tables
 100 // ----------------------------------------------------------------------------
 101
 102 BEGIN_EVENT_TABLE(wxPopupWindowHandler, wxEvtHandler)
 103     EVT_LEFT_DOWN(wxPopupWindowHandler::OnLeftDown)
 104 END_EVENT_TABLE()
 105
 106 BEGIN_EVENT_TABLE(wxPopupFocusHandler, wxEvtHandler)
 107     EVT_KILL_FOCUS(wxPopupFocusHandler::OnKillFocus)
 108     EVT_KEY_DOWN(wxPopupFocusHandler::OnKeyDown)
 109 END_EVENT_TABLE()
 110
 111 BEGIN_EVENT_TABLE(wxPopupTransientWindow, wxPopupWindow)
 112 #if defined( __WXMSW__ ) || defined( __WXMAC__)
 113     EVT_IDLE(wxPopupTransientWindow::OnIdle)
 114 #endif
 115 END_EVENT_TABLE()
 116
 117 // ============================================================================
 118 // implementation
 119 // ============================================================================
 120
 121 // ----------------------------------------------------------------------------
 122 // wxPopupWindowBase
 123 // ----------------------------------------------------------------------------
 124
 125 wxPopupWindowBase::~wxPopupWindowBase()
 126 {
 127     // this destructor is required for Darwin
 128 }
 129
 130 bool wxPopupWindowBase::Create(wxWindow* WXUNUSED(parent), int WXUNUSED(flags))
 131 {
 132     return true;
 133 }
 134
 135 void wxPopupWindowBase::Position(const wxPoint& ptOrigin,
 136                                  const wxSize& size)
 137 {
 138     // determine the position and size of the screen we clamp the popup to
 139     wxPoint posScreen;
 140     wxSize sizeScreen;
 141
 142     const int displayNum = wxDisplay::GetFromPoint(ptOrigin);
 143     if ( displayNum != wxNOT_FOUND )
 144     {
 145         const wxRect rectScreen = wxDisplay(displayNum).GetGeometry();
 146         posScreen = rectScreen.GetPosition();
 147         sizeScreen = rectScreen.GetSize();
 148     }
 149     else // outside of any display?
 150     {
 151         // just use the primary one then
 152         posScreen = wxPoint(0, 0);
 153         sizeScreen = wxGetDisplaySize();
 154     }
 155
 156
 157     const wxSize sizeSelf = GetSize();
 158
 159     // is there enough space to put the popup below the window (where we put it
 160     // by default)?
 161     wxCoord y = ptOrigin.y + size.y;
 162     if ( y + sizeSelf.y > posScreen.y + sizeScreen.y )
 163     {
 164         // check if there is enough space above
 165         if ( ptOrigin.y > sizeSelf.y )
 166         {
 167             // do position the control above the window
 168             y -= size.y + sizeSelf.y;
 169         }
 170         //else: not enough space below nor above, leave below
 171     }
 172
 173     // now check left/right too
 174     wxCoord x = ptOrigin.x;
 175
 176     if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
 177     {
 178         // shift the window to the left instead of the right.
 179         x -= size.x;
 180         x -= sizeSelf.x;        // also shift it by window width.
 181     }
 182     else
 183         x += size.x;
 184
 185
 186     if ( x + sizeSelf.x > posScreen.x + sizeScreen.x )
 187     {
 188         // check if there is enough space to the left
 189         if ( ptOrigin.x > sizeSelf.x )
 190         {
 191             // do position the control to the left
 192             x -= size.x + sizeSelf.x;
 193         }
 194         //else: not enough space there neither, leave in default position
 195     }
 196
 197     Move(x, y, wxSIZE_NO_ADJUSTMENTS);
 198 }
 199
 200 // ----------------------------------------------------------------------------
 201 // wxPopupTransientWindow
 202 // ----------------------------------------------------------------------------
 203
 204 void wxPopupTransientWindow::Init()
 205 {
 206     m_child =
 207     m_focus = NULL;
 208
 209     m_handlerFocus = NULL;
 210     m_handlerPopup = NULL;
 211 }
 212
 213 wxPopupTransientWindow::wxPopupTransientWindow(wxWindow *parent, int style)
 214 {
 215     Init();
 216
 217     (void)Create(parent, style);
 218 }
 219
 220 wxPopupTransientWindow::~wxPopupTransientWindow()
 221 {
 222     if (m_handlerPopup && m_handlerPopup->GetNextHandler())
 223         PopHandlers();
 224
 225     wxASSERT(!m_handlerFocus || !m_handlerFocus->GetNextHandler());
 226     wxASSERT(!m_handlerPopup || !m_handlerPopup->GetNextHandler());
 227
 228     delete m_handlerFocus;
 229     delete m_handlerPopup;
 230 }
 231
 232 void wxPopupTransientWindow::PopHandlers()
 233 {
 234     if ( m_child )
 235     {
 236         if ( !m_child->RemoveEventHandler(m_handlerPopup) )
 237         {
 238             // something is very wrong and someone else probably deleted our
 239             // handler - so don't risk deleting it second time
 240             m_handlerPopup = NULL;
 241         }
 242         if (m_child->HasCapture())
 243         {
 244             m_child->ReleaseMouse();
 245         }
 246         m_child = NULL;
 247     }
 248
 249     if ( m_focus )
 250     {
 251         if ( !m_focus->RemoveEventHandler(m_handlerFocus) )
 252         {
 253             // see above
 254             m_handlerFocus = NULL;
 255         }
 256     }
 257     m_focus = NULL;
 258 }
 259
 260 void wxPopupTransientWindow::Popup(wxWindow *winFocus)
 261 {
 262     const wxWindowList& children = GetChildren();
 263     if ( children.GetCount() )
 264     {
 265         m_child = children.GetFirst()->GetData();
 266     }
 267     else
 268     {
 269         m_child = this;
 270     }
 271
 272     Show();
 273
 274     // There is is a problem if these are still in use
 275     wxASSERT(!m_handlerFocus || !m_handlerFocus->GetNextHandler());
 276     wxASSERT(!m_handlerPopup || !m_handlerPopup->GetNextHandler());
 277
 278     if (!m_handlerPopup)
 279         m_handlerPopup = new wxPopupWindowHandler(this);
 280
 281     m_child->PushEventHandler(m_handlerPopup);
 282
 283 #if defined(__WXMSW__)
 284     // Focusing on child of popup window does not work on MSW unless WS_POPUP
 285     // style is set. We do not even want to try to set the focus, as it may
 286     // provoke errors on some Windows versions (Vista and later).
 287     if ( ::GetWindowLong(GetHwnd(), GWL_STYLE) & WS_POPUP )
 288 #endif
 289     {
 290         m_focus = winFocus ? winFocus : this;
 291         m_focus->SetFocus();
 292     }
 293
 294 #if defined( __WXMSW__ ) || defined( __WXMAC__)
 295     // MSW doesn't allow to set focus to the popup window, but we need to
 296     // subclass the window which has the focus, and not winFocus passed in or
 297     // otherwise everything else breaks down
 298     m_focus = FindFocus();
 299 #elif defined(__WXGTK__)
 300     // GTK+ catches the activate events from the popup
 301     // window, not the focus events from the child window
 302     m_focus = this;
 303 #endif
 304
 305     if ( m_focus )
 306     {
 307         if (!m_handlerFocus)
 308             m_handlerFocus = new wxPopupFocusHandler(this);
 309
 310         m_focus->PushEventHandler(m_handlerFocus);
 311     }
 312 }
 313
 314 bool wxPopupTransientWindow::Show( bool show )
 315 {
 316 #ifdef __WXGTK__
 317     if (!show)
 318     {
 319         gdk_pointer_ungrab( (guint32)GDK_CURRENT_TIME );
 320
 321         gtk_grab_remove( m_widget );
 322     }
 323 #endif
 324
 325 #ifdef __WXX11__
 326     if (!show)
 327     {
 328         XUngrabPointer( wxGlobalDisplay(), CurrentTime );
 329     }
 330 #endif
 331
 332 #if defined( __WXMSW__ ) || defined( __WXMAC__)
 333     if (!show && m_child && m_child->HasCapture())
 334     {
 335         m_child->ReleaseMouse();
 336     }
 337 #endif
 338
 339     bool ret = wxPopupWindow::Show( show );
 340
 341 #ifdef __WXGTK__
 342     if (show)
 343     {
 344         gtk_grab_add( m_widget );
 345
 346         gdk_pointer_grab( m_widget->window, TRUE,
 347                           (GdkEventMask)
 348                             (GDK_BUTTON_PRESS_MASK |
 349                              GDK_BUTTON_RELEASE_MASK |
 350                              GDK_POINTER_MOTION_HINT_MASK |
 351                              GDK_POINTER_MOTION_MASK),
 352                           NULL,
 353                           NULL,
 354                           (guint32)GDK_CURRENT_TIME );
 355     }
 356 #endif
 357
 358 #ifdef __WXX11__
 359     if (show)
 360     {
 361         Window xwindow = (Window) m_clientWindow;
 362
 363         /* int res =*/ XGrabPointer(wxGlobalDisplay(), xwindow,
 364             True,
 365             ButtonPressMask | ButtonReleaseMask | ButtonMotionMask | EnterWindowMask | LeaveWindowMask | PointerMotionMask,
 366             GrabModeAsync,
 367             GrabModeAsync,
 368             None,
 369             None,
 370             CurrentTime );
 371     }
 372 #endif
 373
 374 #if defined( __WXMSW__ ) || defined( __WXMAC__)
 375     if (show && m_child)
 376     {
 377         // Assume that the mouse is outside the popup to begin with
 378         m_child->CaptureMouse();
 379     }
 380 #endif
 381
 382     return ret;
 383 }
 384
 385 void wxPopupTransientWindow::Dismiss()
 386 {
 387     Hide();
 388     PopHandlers();
 389 }
 390
 391 void wxPopupTransientWindow::DismissAndNotify()
 392 {
 393     Dismiss();
 394     OnDismiss();
 395 }
 396
 397 void wxPopupTransientWindow::OnDismiss()
 398 {
 399     // nothing to do here - but it may be interesting for derived class
 400 }
 401
 402 bool wxPopupTransientWindow::ProcessLeftDown(wxMouseEvent& WXUNUSED(event))
 403 {
 404     // no special processing here
 405     return false;
 406 }
 407
 408 #if defined( __WXMSW__ ) || defined( __WXMAC__)
 409 void wxPopupTransientWindow::OnIdle(wxIdleEvent& event)
 410 {
 411     event.Skip();
 412
 413     if (IsShown() && m_child)
 414     {
 415         wxPoint pos = ScreenToClient(wxGetMousePosition());
 416         wxRect rect(GetSize());
 417
 418         if ( rect.Contains(pos) )
 419         {
 420             if ( m_child->HasCapture() )
 421             {
 422                 m_child->ReleaseMouse();
 423             }
 424         }
 425         else
 426         {
 427             if ( !m_child->HasCapture() )
 428             {
 429                 m_child->CaptureMouse();
 430             }
 431         }
 432     }
 433 }
 434 #endif // __WXMSW__
 435
 436
 437 #if wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
 438
 439 // ----------------------------------------------------------------------------
 440 // wxPopupComboWindow
 441 // ----------------------------------------------------------------------------
 442
 443 BEGIN_EVENT_TABLE(wxPopupComboWindow, wxPopupTransientWindow)
 444     EVT_KEY_DOWN(wxPopupComboWindow::OnKeyDown)
 445 END_EVENT_TABLE()
 446
 447 wxPopupComboWindow::wxPopupComboWindow(wxComboCtrl *parent)
 448                   : wxPopupTransientWindow(parent)
 449 {
 450     m_combo = parent;
 451 }
 452
 453 bool wxPopupComboWindow::Create(wxComboCtrl *parent)
 454 {
 455     m_combo = parent;
 456
 457     return wxPopupWindow::Create(parent);
 458 }
 459
 460 void wxPopupComboWindow::PositionNearCombo()
 461 {
 462     // the origin point must be in screen coords
 463     wxPoint ptOrigin = m_combo->ClientToScreen(wxPoint(0,0));
 464
 465 #if 0 //def __WXUNIVERSAL__
 466     // account for the fact that (0, 0) is not the top left corner of the
 467     // window: there is also the border
 468     wxRect rectBorders = m_combo->GetRenderer()->
 469                             GetBorderDimensions(m_combo->GetBorder());
 470     ptOrigin.x -= rectBorders.x;
 471     ptOrigin.y -= rectBorders.y;
 472 #endif // __WXUNIVERSAL__
 473
 474     // position below or above the combobox: the width is 0 to put it exactly
 475     // below us, not to the left or to the right
 476     Position(ptOrigin, wxSize(0, m_combo->GetSize().y));
 477 }
 478
 479 void wxPopupComboWindow::OnDismiss()
 480 {
 481     m_combo->OnPopupDismiss();
 482 }
 483
 484 void wxPopupComboWindow::OnKeyDown(wxKeyEvent& event)
 485 {
 486     m_combo->ProcessWindowEvent(event);
 487 }
 488
 489 #endif // wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
 490
 491 // ----------------------------------------------------------------------------
 492 // wxPopupWindowHandler
 493 // ----------------------------------------------------------------------------
 494
 495 void wxPopupWindowHandler::OnLeftDown(wxMouseEvent& event)
 496 {
 497     // let the window have it first (we're the first event handler in the chain
 498     // of handlers for this window)
 499     if ( m_popup->ProcessLeftDown(event) )
 500     {
 501         return;
 502     }
 503
 504     wxPoint pos = event.GetPosition();
 505
 506     // in non-Univ ports the system manages scrollbars for us
 507 #if defined(__WXUNIVERSAL__) && wxUSE_SCROLLBAR
 508     // scrollbar on which the click occurred
 509     wxWindow *sbar = NULL;
 510 #endif // __WXUNIVERSAL__ && wxUSE_SCROLLBAR
 511
 512     wxWindow *win = (wxWindow *)event.GetEventObject();
 513
 514     switch ( win->HitTest(pos.x, pos.y) )
 515     {
 516         case wxHT_WINDOW_OUTSIDE:
 517             {
 518                 // do the coords translation now as after DismissAndNotify()
 519                 // m_popup may be destroyed
 520                 wxMouseEvent event2(event);
 521
 522                 m_popup->ClientToScreen(&event2.m_x, &event2.m_y);
 523
 524                 // clicking outside a popup dismisses it
 525                 m_popup->DismissAndNotify();
 526
 527                 // dismissing a tooltip shouldn't waste a click, i.e. you
 528                 // should be able to dismiss it and press the button with the
 529                 // same click, so repost this event to the window beneath us
 530                 wxWindow *winUnder = wxFindWindowAtPoint(event2.GetPosition());
 531                 if ( winUnder )
 532                 {
 533                     // translate the event coords to the ones of the window
 534                     // which is going to get the event
 535                     winUnder->ScreenToClient(&event2.m_x, &event2.m_y);
 536
 537                     event2.SetEventObject(winUnder);
 538                     wxPostEvent(winUnder->GetEventHandler(), event2);
 539                 }
 540             }
 541             break;
 542
 543 #if defined(__WXUNIVERSAL__) && wxUSE_SCROLLBAR
 544         case wxHT_WINDOW_HORZ_SCROLLBAR:
 545             sbar = win->GetScrollbar(wxHORIZONTAL);
 546             break;
 547
 548         case wxHT_WINDOW_VERT_SCROLLBAR:
 549             sbar = win->GetScrollbar(wxVERTICAL);
 550             break;
 551 #endif // __WXUNIVERSAL__ && wxUSE_SCROLLBAR
 552
 553         default:
 554             // forgot to update the switch after adding a new hit test code?
 555             wxFAIL_MSG( _T("unexpected HitTest() return value") );
 556             // fall through
 557
 558         case wxHT_WINDOW_CORNER:
 559             // don't actually know if this one is good for anything, but let it
 560             // pass just in case
 561
 562         case wxHT_WINDOW_INSIDE:
 563             // let the normal processing take place
 564             event.Skip();
 565             break;
 566     }
 567
 568 #if defined(__WXUNIVERSAL__) && wxUSE_SCROLLBAR
 569     if ( sbar )
 570     {
 571         // translate the event coordinates to the scrollbar ones
 572         pos = sbar->ScreenToClient(win->ClientToScreen(pos));
 573
 574         // and give the event to it
 575         wxMouseEvent event2 = event;
 576         event2.m_x = pos.x;
 577         event2.m_y = pos.y;
 578
 579         (void)sbar->GetEventHandler()->ProcessEvent(event2);
 580     }
 581 #endif // __WXUNIVERSAL__ && wxUSE_SCROLLBAR
 582 }
 583
 584 // ----------------------------------------------------------------------------
 585 // wxPopupFocusHandler
 586 // ----------------------------------------------------------------------------
 587
 588 void wxPopupFocusHandler::OnKillFocus(wxFocusEvent& event)
 589 {
 590     // when we lose focus we always disappear - unless it goes to the popup (in
 591     // which case we don't really lose it)
 592     wxWindow *win = event.GetWindow();
 593     while ( win )
 594     {
 595         if ( win == m_popup )
 596             return;
 597         win = win->GetParent();
 598     }
 599
 600     m_popup->DismissAndNotify();
 601 }
 602
 603 void wxPopupFocusHandler::OnKeyDown(wxKeyEvent& event)
 604 {
 605     // we can be associated with the popup itself in which case we should avoid
 606     // infinite recursion
 607     static int s_inside;
 608     wxRecursionGuard guard(s_inside);
 609     if ( guard.IsInside() )
 610     {
 611         event.Skip();
 612         return;
 613     }
 614
 615     // let the window have it first, it might process the keys
 616     if ( !m_popup->GetEventHandler()->ProcessEvent(event) )
 617     {
 618         // by default, dismiss the popup
 619         m_popup->DismissAndNotify();
 620     }
 621 }
 622
 623 #endif // wxUSE_POPUPWIN