src/msw/toplevel.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/toplevel.cpp
   3 // Purpose:     implements wxTopLevelWindow for MSW
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     24.09.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
   9 // License:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "toplevel.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 #ifndef WX_PRECOMP
  32     #include "wx/app.h"
  33     #include "wx/toplevel.h"
  34     #include "wx/string.h"
  35     #include "wx/log.h"
  36     #include "wx/intl.h"
  37     #include "wx/frame.h"
  38 #endif //WX_PRECOMP
  39
  40 #include "wx/msw/private.h"
  41
  42 // ----------------------------------------------------------------------------
  43 // stubs for missing functions under MicroWindows
  44 // ----------------------------------------------------------------------------
  45
  46 #ifdef __WXMICROWIN__
  47
  48 // static inline bool IsIconic(HWND WXUNUSED(hwnd)) { return FALSE; }
  49 static inline bool IsZoomed(HWND WXUNUSED(hwnd)) { return FALSE; }
  50
  51 #endif // __WXMICROWIN__
  52
  53 // ----------------------------------------------------------------------------
  54 // globals
  55 // ----------------------------------------------------------------------------
  56
  57 // list of all frames and modeless dialogs
  58 wxWindowList wxModelessWindows;
  59
  60 // the name of the default wxWindows class
  61 extern const wxChar *wxCanvasClassName;
  62
  63 // ============================================================================
  64 // wxTopLevelWindowMSW implementation
  65 // ============================================================================
  66
  67 // Dialog window proc
  68 LONG APIENTRY _EXPORT
  69 wxDlgProc(HWND WXUNUSED(hWnd), UINT message, WPARAM WXUNUSED(wParam), LPARAM WXUNUSED(lParam))
  70 {
  71     if ( message == WM_INITDIALOG )
  72     {
  73         // for this message, returning TRUE tells system to set focus to the
  74         // first control in the dialog box
  75         return TRUE;
  76     }
  77     else
  78     {
  79         // for all the other ones, FALSE means that we didn't process the
  80         // message
  81         return FALSE;
  82     }
  83 }
  84
  85 // ----------------------------------------------------------------------------
  86 // wxTopLevelWindowMSW creation
  87 // ----------------------------------------------------------------------------
  88
  89 void wxTopLevelWindowMSW::Init()
  90 {
  91     m_iconized =
  92     m_maximizeOnShow = FALSE;
  93
  94     // unlike (almost?) all other windows, frames are created hidden
  95     m_isShown = FALSE;
  96
  97     // Data to save/restore when calling ShowFullScreen
  98     m_fsStyle = 0;
  99     m_fsOldWindowStyle = 0;
 100     m_fsIsMaximized = FALSE;
 101     m_fsIsShowing = FALSE;
 102 }
 103
 104 long wxTopLevelWindowMSW::MSWGetCreateWindowFlags(long *exflags) const
 105 {
 106     long style = GetWindowStyle();
 107     long msflags = 0;
 108
 109     // first select the kind of window being created
 110     if ( style & wxCAPTION )
 111     {
 112         if ( style & wxFRAME_TOOL_WINDOW )
 113             msflags |= WS_POPUPWINDOW;
 114         else
 115             msflags |= WS_OVERLAPPED;
 116     }
 117     else
 118     {
 119         msflags |= WS_POPUP;
 120     }
 121
 122     // next translate the individual flags
 123     if ( style & wxMINIMIZE_BOX )
 124         msflags |= WS_MINIMIZEBOX;
 125     if ( style & wxMAXIMIZE_BOX )
 126         msflags |= WS_MAXIMIZEBOX;
 127     if ( style & wxTHICK_FRAME )
 128         msflags |= WS_THICKFRAME;
 129     if ( style & wxSYSTEM_MENU )
 130         msflags |= WS_SYSMENU;
 131     if ( style & wxMINIMIZE )
 132         msflags |= WS_MINIMIZE;
 133     if ( style & wxMAXIMIZE )
 134         msflags |= WS_MAXIMIZE;
 135     if ( style & wxCAPTION )
 136         msflags |= WS_CAPTION;
 137     if ( style & wxCLIP_CHILDREN )
 138         msflags |= WS_CLIPCHILDREN;
 139
 140     // Keep this here because it saves recoding this function in wxTinyFrame
 141 #if wxUSE_ITSY_BITSY && !defined(__WIN32__)
 142     if ( style & wxTINY_CAPTION_VERT )
 143         msflags |= IBS_VERTCAPTION;
 144     if ( style & wxTINY_CAPTION_HORIZ )
 145         msflags |= IBS_HORZCAPTION;
 146 #else
 147     if ( style & (wxTINY_CAPTION_VERT | wxTINY_CAPTION_HORIZ) )
 148         msflags |= WS_CAPTION;
 149 #endif
 150
 151     if ( exflags )
 152     {
 153         *exflags = MakeExtendedStyle(style);
 154
 155 #if !defined(__WIN16__) && !defined(__SC__)
 156         if ( !(GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) )
 157         {
 158             // make all frames appear in the win9x shell taskbar unless
 159             // wxFRAME_TOOL_WINDOW or wxFRAME_NO_TASKBAR is given - without
 160             // giving them WS_EX_APPWINDOW style, the child (i.e. owned) frames
 161             // wouldn't appear in it
 162             if ( (style & wxFRAME_TOOL_WINDOW) || (style & wxFRAME_NO_TASKBAR) )
 163                 *exflags |= WS_EX_TOOLWINDOW;
 164             else if ( !(style & wxFRAME_NO_TASKBAR) )
 165                 *exflags |= WS_EX_APPWINDOW;
 166         }
 167 #endif // !Win16
 168
 169         if ( style & wxSTAY_ON_TOP )
 170             *exflags |= WS_EX_TOPMOST;
 171
 172 #ifdef __WIN32__
 173         if ( m_exStyle & wxFRAME_EX_CONTEXTHELP )
 174             *exflags |= WS_EX_CONTEXTHELP;
 175 #endif // __WIN32__
 176     }
 177
 178     return msflags;
 179 }
 180
 181 bool wxTopLevelWindowMSW::CreateDialog(const wxChar *dlgTemplate,
 182                                        const wxString& title,
 183                                        const wxPoint& pos,
 184                                        const wxSize& size)
 185 {
 186 #ifdef __WXMICROWIN__
 187     // no dialogs support under MicroWin yet
 188     return CreateFrame(title, pos, size);
 189 #else // !__WXMICROWIN__
 190     wxWindow *parent = GetParent();
 191
 192     // for the dialogs without wxDIALOG_NO_PARENT style, use the top level
 193     // app window as parent - this avoids creating modal dialogs without
 194     // parent
 195     if ( !parent && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
 196     {
 197         parent = wxTheApp->GetTopWindow();
 198
 199         if ( parent )
 200         {
 201             // don't use transient windows as parents, this is dangerous as it
 202             // can lead to a crash if the parent is destroyed before the child
 203             //
 204             // also don't use the window which is currently hidden as then the
 205             // dialog would be hidden as well
 206             if ( (parent->GetExtraStyle() & wxWS_EX_TRANSIENT) ||
 207                     !parent->IsShown() )
 208             {
 209                 parent = NULL;
 210             }
 211         }
 212     }
 213
 214     m_hWnd = (WXHWND)::CreateDialog(wxGetInstance(),
 215                                     dlgTemplate,
 216                                     parent ? GetHwndOf(parent) : NULL,
 217                                     (DLGPROC)wxDlgProc);
 218
 219     if ( !m_hWnd )
 220     {
 221         wxFAIL_MSG(_("Did you forget to include wx/msw/wx.rc in your resources?"));
 222
 223         wxLogSysError(_("Can't create dialog using template '%s'"), dlgTemplate);
 224
 225         return FALSE;
 226     }
 227
 228     long exflags;
 229     (void)MSWGetCreateWindowFlags(&exflags);
 230
 231     if ( exflags )
 232     {
 233         ::SetWindowLong(GetHwnd(), GWL_EXSTYLE, exflags);
 234         ::SetWindowPos(GetHwnd(), NULL, 0, 0, 0, 0,
 235                        SWP_NOSIZE |
 236                        SWP_NOMOVE |
 237                        SWP_NOZORDER |
 238                        SWP_NOACTIVATE);
 239     }
 240
 241 #if defined(__WIN95__)
 242     // For some reason, the system menu is activated when we use the
 243     // WS_EX_CONTEXTHELP style, so let's set a reasonable icon
 244     if ( exflags & WS_EX_CONTEXTHELP )
 245     {
 246         wxFrame *winTop = wxDynamicCast(wxTheApp->GetTopWindow(), wxFrame);
 247         if ( winTop )
 248         {
 249             wxIcon icon = winTop->GetIcon();
 250             if ( icon.Ok() )
 251             {
 252                 ::SendMessage(GetHwnd(), WM_SETICON,
 253                               (WPARAM)TRUE,
 254                               (LPARAM)GetHiconOf(icon));
 255             }
 256         }
 257     }
 258 #endif // __WIN95__
 259
 260     // move the dialog to its initial position without forcing repainting
 261     int x, y, w, h;
 262     if ( !MSWGetCreateWindowCoords(pos, size, x, y, w, h) )
 263     {
 264         x =
 265         w = (int)CW_USEDEFAULT;
 266     }
 267
 268     // we can't use CW_USEDEFAULT here as we're not calling CreateWindow()
 269     // and passing CW_USEDEFAULT to MoveWindow() results in resizing the
 270     // window to (0, 0) size which breaks quite a lot of things, e.g. the
 271     // sizer calculation in wxSizer::Fit()
 272     if ( w == (int)CW_USEDEFAULT )
 273     {
 274         // the exact number doesn't matter, the dialog will be resized
 275         // again soon anyhow but it should be big enough to allow
 276         // calculation relying on "totalSize - clientSize > 0" work, i.e.
 277         // at least greater than the title bar height
 278         w =
 279         h = 100;
 280     }
 281
 282     if ( x == (int)CW_USEDEFAULT )
 283     {
 284         // centre it on the screen - what else can we do?
 285         wxSize sizeDpy = wxGetDisplaySize();
 286
 287         x = (sizeDpy.x - w) / 2;
 288         y = (sizeDpy.y - h) / 2;
 289     }
 290
 291     if ( !::MoveWindow(GetHwnd(), x, y, w, h, FALSE) )
 292     {
 293         wxLogLastError(wxT("MoveWindow"));
 294     }
 295
 296     if ( !title.empty() )
 297     {
 298         ::SetWindowText(GetHwnd(), title);
 299     }
 300
 301     SubclassWin(m_hWnd);
 302
 303     return TRUE;
 304 #endif // __WXMICROWIN__/!__WXMICROWIN__
 305 }
 306
 307 bool wxTopLevelWindowMSW::CreateFrame(const wxString& title,
 308                                       const wxPoint& pos,
 309                                       const wxSize& size)
 310 {
 311     long exflags;
 312     long flags = MSWGetCreateWindowFlags(&exflags);
 313
 314     return MSWCreate(wxCanvasClassName, title, pos, size, flags, exflags);
 315 }
 316
 317 bool wxTopLevelWindowMSW::Create(wxWindow *parent,
 318                                  wxWindowID id,
 319                                  const wxString& title,
 320                                  const wxPoint& pos,
 321                                  const wxSize& size,
 322                                  long style,
 323                                  const wxString& name)
 324 {
 325     // init our fields
 326     Init();
 327
 328     m_windowStyle = style;
 329
 330     SetName(name);
 331
 332     m_windowId = id == -1 ? NewControlId() : id;
 333
 334     wxTopLevelWindows.Append(this);
 335
 336     if ( parent )
 337         parent->AddChild(this);
 338
 339     if ( GetExtraStyle() & wxTOPLEVEL_EX_DIALOG )
 340     {
 341         // TODO: it would be better to construct the dialog template in memory
 342         //       during run-time than to rely on the limited number of
 343         //       templates in wx.rc because:
 344         //          a) you wouldn't have to include wx.rc in all wxWin programs
 345         //             (and the number of complaints about it would dtop)
 346         //          b) we'd be able to provide more templates simply, i.e.
 347         //             we could generate the templates for all style
 348         //             combinations
 349
 350         // we have different dialog templates to allows creation of dialogs
 351         // with & without captions under MSWindows, resizeable or not (but a
 352         // resizeable dialog always has caption - otherwise it would look too
 353         // strange)
 354         const wxChar *dlgTemplate;
 355         if ( style & wxRESIZE_BORDER )
 356             dlgTemplate = wxT("wxResizeableDialog");
 357         else if ( style & wxCAPTION )
 358             dlgTemplate = wxT("wxCaptionDialog");
 359         else
 360             dlgTemplate = wxT("wxNoCaptionDialog");
 361
 362         return CreateDialog(dlgTemplate, title, pos, size);
 363     }
 364     else // !dialog
 365     {
 366         return CreateFrame(title, pos, size);
 367     }
 368 }
 369
 370 wxTopLevelWindowMSW::~wxTopLevelWindowMSW()
 371 {
 372     wxTopLevelWindows.DeleteObject(this);
 373
 374     if ( wxModelessWindows.Find(this) )
 375         wxModelessWindows.DeleteObject(this);
 376
 377     // If this is the last top-level window, exit.
 378     if ( wxTheApp && (wxTopLevelWindows.Number() == 0) )
 379     {
 380         wxTheApp->SetTopWindow(NULL);
 381
 382         if ( wxTheApp->GetExitOnFrameDelete() )
 383         {
 384             ::PostQuitMessage(0);
 385         }
 386     }
 387 }
 388
 389 // ----------------------------------------------------------------------------
 390 // wxTopLevelWindowMSW showing
 391 // ----------------------------------------------------------------------------
 392
 393 void wxTopLevelWindowMSW::DoShowWindow(int nShowCmd)
 394 {
 395     ::ShowWindow(GetHwnd(), nShowCmd);
 396
 397     m_iconized = nShowCmd == SW_MINIMIZE;
 398 }
 399
 400 bool wxTopLevelWindowMSW::Show(bool show)
 401 {
 402     // don't use wxWindow version as we want to call DoShowWindow() ourselves
 403     if ( !wxWindowBase::Show(show) )
 404         return FALSE;
 405
 406     int nShowCmd;
 407     if ( show )
 408     {
 409         if ( m_maximizeOnShow )
 410         {
 411             // show and maximize
 412             nShowCmd = SW_MAXIMIZE;
 413
 414             m_maximizeOnShow = FALSE;
 415         }
 416         else // just show
 417         {
 418             nShowCmd = SW_SHOW;
 419         }
 420     }
 421     else // hide
 422     {
 423         nShowCmd = SW_HIDE;
 424     }
 425
 426     DoShowWindow(nShowCmd);
 427
 428     if ( show )
 429     {
 430         ::BringWindowToTop(GetHwnd());
 431
 432         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_windowId);
 433         event.SetEventObject( this );
 434         GetEventHandler()->ProcessEvent(event);
 435     }
 436     else // hide
 437     {
 438         // Try to highlight the correct window (the parent)
 439         if ( GetParent() )
 440         {
 441             HWND hWndParent = GetHwndOf(GetParent());
 442             if (hWndParent)
 443                 ::BringWindowToTop(hWndParent);
 444         }
 445     }
 446
 447     return TRUE;
 448 }
 449
 450 // ----------------------------------------------------------------------------
 451 // wxTopLevelWindowMSW maximize/minimize
 452 // ----------------------------------------------------------------------------
 453
 454 void wxTopLevelWindowMSW::Maximize(bool maximize)
 455 {
 456     if ( IsShown() )
 457     {
 458         // just maximize it directly
 459         DoShowWindow(maximize ? SW_MAXIMIZE : SW_RESTORE);
 460     }
 461     else // hidden
 462     {
 463         // we can't maximize the hidden frame because it shows it as well, so
 464         // just remember that we should do it later in this case
 465         m_maximizeOnShow = TRUE;
 466     }
 467 }
 468
 469 bool wxTopLevelWindowMSW::IsMaximized() const
 470 {
 471     return ::IsZoomed(GetHwnd()) != 0;
 472 }
 473
 474 void wxTopLevelWindowMSW::Iconize(bool iconize)
 475 {
 476     DoShowWindow(iconize ? SW_MINIMIZE : SW_RESTORE);
 477 }
 478
 479 bool wxTopLevelWindowMSW::IsIconized() const
 480 {
 481     // also update the current state
 482     ((wxTopLevelWindowMSW *)this)->m_iconized = ::IsIconic(GetHwnd()) != 0;
 483
 484     return m_iconized;
 485 }
 486
 487 void wxTopLevelWindowMSW::Restore()
 488 {
 489     DoShowWindow(SW_RESTORE);
 490 }
 491
 492 // ----------------------------------------------------------------------------
 493 // wxTopLevelWindowMSW fullscreen
 494 // ----------------------------------------------------------------------------
 495
 496 bool wxTopLevelWindowMSW::ShowFullScreen(bool show, long style)
 497 {
 498     if (show)
 499     {
 500         if (IsFullScreen())
 501             return FALSE;
 502
 503         m_fsIsShowing = TRUE;
 504         m_fsStyle = style;
 505
 506         // zap the frame borders
 507
 508         // save the 'normal' window style
 509         m_fsOldWindowStyle = GetWindowLong((HWND)GetHWND(), GWL_STYLE);
 510
 511         // save the old position, width & height, maximize state
 512         m_fsOldSize = GetRect();
 513         m_fsIsMaximized = IsMaximized();
 514
 515         // decide which window style flags to turn off
 516         LONG newStyle = m_fsOldWindowStyle;
 517         LONG offFlags = 0;
 518
 519         if (style & wxFULLSCREEN_NOBORDER)
 520             offFlags |= WS_BORDER | WS_THICKFRAME;
 521         if (style & wxFULLSCREEN_NOCAPTION)
 522             offFlags |= (WS_CAPTION | WS_SYSMENU);
 523
 524         newStyle &= (~offFlags);
 525
 526         // change our window style to be compatible with full-screen mode
 527         ::SetWindowLong((HWND)GetHWND(), GWL_STYLE, newStyle);
 528
 529         // resize to the size of the desktop
 530         int width, height;
 531
 532         RECT rect = wxGetWindowRect(::GetDesktopWindow());
 533         width = rect.right - rect.left;
 534         height = rect.bottom - rect.top;
 535
 536         SetSize(width, height);
 537
 538         // now flush the window style cache and actually go full-screen
 539         SetWindowPos((HWND)GetHWND(), HWND_TOP, 0, 0, width, height, SWP_FRAMECHANGED);
 540
 541         wxSizeEvent event(wxSize(width, height), GetId());
 542         GetEventHandler()->ProcessEvent(event);
 543
 544         return TRUE;
 545     }
 546     else
 547     {
 548         if (!IsFullScreen())
 549             return FALSE;
 550
 551         m_fsIsShowing = FALSE;
 552
 553         Maximize(m_fsIsMaximized);
 554         SetWindowLong((HWND)GetHWND(),GWL_STYLE, m_fsOldWindowStyle);
 555         SetWindowPos((HWND)GetHWND(),HWND_TOP,m_fsOldSize.x, m_fsOldSize.y,
 556             m_fsOldSize.width, m_fsOldSize.height, SWP_FRAMECHANGED);
 557
 558         return TRUE;
 559     }
 560 }
 561
 562 // ----------------------------------------------------------------------------
 563 // wxTopLevelWindowMSW misc
 564 // ----------------------------------------------------------------------------
 565
 566 void wxTopLevelWindowMSW::SetIcon(const wxIcon& icon)
 567 {
 568     // this sets m_icon
 569     wxTopLevelWindowBase::SetIcon(icon);
 570
 571 #if defined(__WIN95__) && !defined(__WXMICROWIN__)
 572     if ( m_icon.Ok() )
 573     {
 574         ::SendMessage(GetHwnd(), WM_SETICON,
 575                       (WPARAM)TRUE, (LPARAM)GetHiconOf(m_icon));
 576     }
 577 #endif // __WIN95__
 578 }
 579
 580 bool wxTopLevelWindowMSW::EnableCloseButton(bool enable)
 581 {
 582 #ifndef __WXMICROWIN__
 583     // get system (a.k.a. window) menu
 584     HMENU hmenu = ::GetSystemMenu(GetHwnd(), FALSE /* get it */);
 585     if ( !hmenu )
 586     {
 587         wxLogLastError(_T("GetSystemMenu"));
 588
 589         return FALSE;
 590     }
 591
 592     // enabling/disabling the close item from it also automatically
 593     // disables/enables the close title bar button
 594     if ( ::EnableMenuItem(hmenu, SC_CLOSE,
 595                           MF_BYCOMMAND |
 596                           (enable ? MF_ENABLED : MF_GRAYED)) == -1 )
 597     {
 598         wxLogLastError(_T("EnableMenuItem(SC_CLOSE)"));
 599
 600         return FALSE;
 601     }
 602
 603     // update appearance immediately
 604     if ( !::DrawMenuBar(GetHwnd()) )
 605     {
 606         wxLogLastError(_T("DrawMenuBar"));
 607     }
 608 #endif // !__WXMICROWIN__
 609
 610     return TRUE;
 611 }
 612