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