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