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 license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  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 && !defined(__WXMOTIF__)
  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__) || defined(__WXPM__)
  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 };
  78
  79 class wxPopupFocusHandler : public wxEvtHandler
  80 {
  81 public:
  82     wxPopupFocusHandler(wxPopupTransientWindow *popup)
  83     {
  84         m_popup = popup;
  85
  86 #ifdef __WXGTK__
  87         // ignore the next few OnKillFocus() calls
  88         m_creationTime = time(NULL);
  89 #endif // __WXGTK__
  90     }
  91
  92 protected:
  93     // event handlers
  94     void OnKillFocus(wxFocusEvent& event);
  95     void OnKeyDown(wxKeyEvent& event);
  96
  97 private:
  98     wxPopupTransientWindow *m_popup;
  99
 100     // hack around wxGTK bug: we always get several kill focus events
 101     // immediately after creation!
 102 #ifdef __WXGTK__
 103     time_t m_creationTime;
 104 #endif // __WXGTK__
 105
 106     DECLARE_EVENT_TABLE()
 107 };
 108
 109 // ----------------------------------------------------------------------------
 110 // event tables
 111 // ----------------------------------------------------------------------------
 112
 113 BEGIN_EVENT_TABLE(wxPopupWindowHandler, wxEvtHandler)
 114     EVT_LEFT_DOWN(wxPopupWindowHandler::OnLeftDown)
 115 END_EVENT_TABLE()
 116
 117 BEGIN_EVENT_TABLE(wxPopupFocusHandler, wxEvtHandler)
 118     EVT_KILL_FOCUS(wxPopupFocusHandler::OnKillFocus)
 119     EVT_KEY_DOWN(wxPopupFocusHandler::OnKeyDown)
 120 END_EVENT_TABLE()
 121
 122 // ============================================================================
 123 // implementation
 124 // ============================================================================
 125
 126 // ----------------------------------------------------------------------------
 127 // wxPopupWindowBase
 128 // ----------------------------------------------------------------------------
 129
 130 wxPopupWindowBase::~wxPopupWindowBase()
 131 {
 132     // this destructor is required for Darwin
 133 }
 134
 135 bool wxPopupWindowBase::Create(wxWindow* WXUNUSED(parent), int WXUNUSED(flags))
 136 {
 137     return TRUE;
 138 }
 139
 140 void wxPopupWindowBase::Position(const wxPoint& ptOrigin,
 141                                  const wxSize& size)
 142 {
 143     wxSize sizeScreen = wxGetDisplaySize(),
 144            sizeSelf = GetSize();
 145
 146     // is there enough space to put the popup below the window (where we put it
 147     // by default)?
 148     wxCoord y = ptOrigin.y + size.y;
 149     if ( y + sizeSelf.y > sizeScreen.y )
 150     {
 151         // check if there is enough space above
 152         if ( ptOrigin.y > sizeSelf.y )
 153         {
 154             // do position the control above the window
 155             y -= size.y + sizeSelf.y;
 156         }
 157         //else: not enough space below nor above, leave below
 158     }
 159
 160     // now check left/right too
 161     wxCoord x = ptOrigin.x + size.x;
 162     if ( x + sizeSelf.x > sizeScreen.x )
 163     {
 164         // check if there is enough space to the left
 165         if ( ptOrigin.x > sizeSelf.x )
 166         {
 167             // do position the control to the left
 168             x -= size.x + sizeSelf.x;
 169         }
 170         //else: not enough space there neither, leave in default position
 171     }
 172
 173     Move(x, y, wxSIZE_NO_ADJUSTMENTS);
 174 }
 175
 176 // ----------------------------------------------------------------------------
 177 // wxPopupTransientWindow
 178 // ----------------------------------------------------------------------------
 179
 180 void wxPopupTransientWindow::Init()
 181 {
 182     m_child =
 183     m_focus = (wxWindow *)NULL;
 184
 185     m_handlerFocus = NULL;
 186     m_handlerPopup = NULL;
 187 }
 188
 189 wxPopupTransientWindow::wxPopupTransientWindow(wxWindow *parent, int style)
 190 {
 191     Init();
 192
 193     (void)Create(parent, style);
 194 }
 195
 196 wxPopupTransientWindow::~wxPopupTransientWindow()
 197 {
 198     PopHandlers();
 199
 200     delete m_handlerFocus;
 201     delete m_handlerPopup;
 202 }
 203
 204 void wxPopupTransientWindow::PopHandlers()
 205 {
 206     if ( m_child )
 207     {
 208         if ( !m_child->RemoveEventHandler(m_handlerPopup) )
 209         {
 210             // something is very wrong and someone else probably deleted our
 211             // handler - so don't risk deleting it second time
 212             m_handlerPopup = NULL;
 213         }
 214
 215         m_child->ReleaseMouse();
 216         m_child = NULL;
 217     }
 218
 219     if ( m_focus )
 220     {
 221 #ifndef __WXX11__
 222         if ( !m_focus->RemoveEventHandler(m_handlerFocus) )
 223         {
 224             // see above
 225             m_handlerFocus = NULL;
 226         }
 227 #endif
 228         m_focus = NULL;
 229     }
 230 }
 231
 232 void wxPopupTransientWindow::Popup(wxWindow *winFocus)
 233 {
 234     const wxWindowList& children = GetChildren();
 235     if ( children.GetCount() )
 236     {
 237         m_child = children.GetFirst()->GetData();
 238     }
 239     else
 240     {
 241         m_child = this;
 242     }
 243
 244     // we can't capture mouse before the window is shown in wxGTK, so do it
 245     // first
 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 #ifndef __WXX11__
 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     if ( m_focus )
 265 #endif // __WXMSW__
 266     {
 267         delete m_handlerFocus;
 268         m_handlerFocus = new wxPopupFocusHandler(this);
 269
 270         m_focus->PushEventHandler(m_handlerFocus);
 271     }
 272
 273 #endif // !__WXX11__
 274 }
 275
 276 void wxPopupTransientWindow::Dismiss()
 277 {
 278     PopHandlers();
 279
 280     Hide();
 281 }
 282
 283 void wxPopupTransientWindow::DismissAndNotify()
 284 {
 285     Dismiss();
 286
 287     OnDismiss();
 288 }
 289
 290 void wxPopupTransientWindow::OnDismiss()
 291 {
 292     // nothing to do here - but it may be interesting for derived class
 293 }
 294
 295 bool wxPopupTransientWindow::ProcessLeftDown(wxMouseEvent& WXUNUSED(event))
 296 {
 297     // no special processing here
 298     return FALSE;
 299 }
 300
 301 #if wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
 302
 303 // ----------------------------------------------------------------------------
 304 // wxPopupComboWindow
 305 // ----------------------------------------------------------------------------
 306
 307 BEGIN_EVENT_TABLE(wxPopupComboWindow, wxPopupTransientWindow)
 308     EVT_KEY_DOWN(wxPopupComboWindow::OnKeyDown)
 309 END_EVENT_TABLE()
 310
 311 wxPopupComboWindow::wxPopupComboWindow(wxComboControl *parent)
 312                   : wxPopupTransientWindow(parent)
 313 {
 314     m_combo = parent;
 315 }
 316
 317 bool wxPopupComboWindow::Create(wxComboControl *parent)
 318 {
 319     m_combo = parent;
 320
 321     return wxPopupWindow::Create(parent);
 322 }
 323
 324 void wxPopupComboWindow::PositionNearCombo()
 325 {
 326     // the origin point must be in screen coords
 327     wxPoint ptOrigin = m_combo->ClientToScreen(wxPoint(0, 0));
 328
 329 #if 0 //def __WXUNIVERSAL__
 330     // account for the fact that (0, 0) is not the top left corner of the
 331     // window: there is also the border
 332     wxRect rectBorders = m_combo->GetRenderer()->
 333                             GetBorderDimensions(m_combo->GetBorder());
 334     ptOrigin.x -= rectBorders.x;
 335     ptOrigin.y -= rectBorders.y;
 336 #endif // __WXUNIVERSAL__
 337
 338     // position below or above the combobox: the width is 0 to put it exactly
 339     // below us, not to the left or to the right
 340     Position(ptOrigin, wxSize(0, m_combo->GetSize().y));
 341 }
 342
 343 void wxPopupComboWindow::OnDismiss()
 344 {
 345     m_combo->OnDismiss();
 346 }
 347
 348 void wxPopupComboWindow::OnKeyDown(wxKeyEvent& event)
 349 {
 350     m_combo->ProcessEvent(event);
 351 }
 352
 353 #endif // wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
 354
 355 // ----------------------------------------------------------------------------
 356 // wxPopupWindowHandler
 357 // ----------------------------------------------------------------------------
 358
 359 void wxPopupWindowHandler::OnLeftDown(wxMouseEvent& event)
 360 {
 361     // let the window have it first (we're the first event handler in the chain
 362     // of handlers for this window)
 363     if ( m_popup->ProcessLeftDown(event) )
 364     {
 365         return;
 366     }
 367
 368     wxPoint pos = event.GetPosition();
 369
 370     // scrollbar on which the click occured
 371     wxWindow *sbar = NULL;
 372
 373     wxWindow *win = (wxWindow *)event.GetEventObject();
 374
 375     switch ( win->HitTest(pos.x, pos.y) )
 376     {
 377         case wxHT_WINDOW_OUTSIDE:
 378             {
 379                 // do the coords translation now as after DismissAndNotify()
 380                 // m_popup may be destroyed
 381                 wxMouseEvent event2(event);
 382
 383                 m_popup->ClientToScreen(&event2.m_x, &event2.m_y);
 384
 385                 // clicking outside a popup dismisses it
 386                 m_popup->DismissAndNotify();
 387
 388                 // dismissing a tooltip shouldn't waste a click, i.e. you
 389                 // should be able to dismiss it and press the button with the
 390                 // same click, so repost this event to the window beneath us
 391                 wxWindow *win = wxFindWindowAtPoint(event2.GetPosition());
 392                 if ( win )
 393                 {
 394                     // translate the event coords to the ones of the window
 395                     // which is going to get the event
 396                     win->ScreenToClient(&event2.m_x, &event2.m_y);
 397
 398                     event2.SetEventObject(win);
 399                     wxPostEvent(win, event2);
 400                 }
 401             }
 402             break;
 403
 404 #ifdef __WXUNIVERSAL__
 405         case wxHT_WINDOW_HORZ_SCROLLBAR:
 406             sbar = win->GetScrollbar(wxHORIZONTAL);
 407             break;
 408
 409         case wxHT_WINDOW_VERT_SCROLLBAR:
 410             sbar = win->GetScrollbar(wxVERTICAL);
 411             break;
 412 #endif
 413
 414         default:
 415             // forgot to update the switch after adding a new hit test code?
 416             wxFAIL_MSG( _T("unexpected HitTest() return value") );
 417             // fall through
 418
 419         case wxHT_WINDOW_CORNER:
 420             // don't actually know if this one is good for anything, but let it
 421             // pass just in case
 422
 423         case wxHT_WINDOW_INSIDE:
 424             // let the normal processing take place
 425             event.Skip();
 426             break;
 427     }
 428
 429     if ( sbar )
 430     {
 431         // translate the event coordinates to the scrollbar ones
 432         pos = sbar->ScreenToClient(win->ClientToScreen(pos));
 433
 434         // and give the event to it
 435         wxMouseEvent event2 = event;
 436         event2.m_x = pos.x;
 437         event2.m_y = pos.y;
 438
 439         (void)sbar->GetEventHandler()->ProcessEvent(event2);
 440     }
 441 }
 442
 443 // ----------------------------------------------------------------------------
 444 // wxPopupFocusHandler
 445 // ----------------------------------------------------------------------------
 446
 447 void wxPopupFocusHandler::OnKillFocus(wxFocusEvent& event)
 448 {
 449 #ifdef __WXGTK__
 450     // ignore the next OnKillFocus() call
 451     if ( time(NULL) < m_creationTime + 1 )
 452     {
 453         event.Skip();
 454
 455         return;
 456     }
 457 #endif // __WXGTK__
 458
 459     // when we lose focus we always disappear - unless it goes to the popup (in
 460     // which case we don't really lose it)
 461     wxWindow *win = event.GetWindow();
 462     while ( win )
 463     {
 464         if ( win == m_popup )
 465             return;
 466         win = win->GetParent();
 467     }
 468
 469     m_popup->DismissAndNotify();
 470 }
 471
 472 void wxPopupFocusHandler::OnKeyDown(wxKeyEvent& event)
 473 {
 474     // let the window have it first, it might process the keys
 475     if ( !m_popup->ProcessEvent(event) )
 476     {
 477         // by default, dismiss the popup
 478         m_popup->DismissAndNotify();
 479     }
 480 }
 481
 482 #endif // wxUSE_POPUPWIN
 483