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         // but don't use the window which is currently hidden as then the
 200         // dialog would be hidden as well
 201         if ( parent && !parent->IsShown() )
 202         {
 203             parent = NULL;
 204         }
 205     }
 206
 207     m_hWnd = (WXHWND)::CreateDialog(wxGetInstance(),
 208                                     dlgTemplate,
 209                                     parent ? GetHwndOf(parent) : NULL,
 210                                     (DLGPROC)wxDlgProc);
 211
 212     if ( !m_hWnd )
 213     {
 214         wxFAIL_MSG(_("Did you forget to include wx/msw/wx.rc in your resources?"));
 215
 216         wxLogSysError(_("Can't create dialog using template '%s'"), dlgTemplate);
 217
 218         return FALSE;
 219     }
 220
 221     long exflags;
 222     (void)MSWGetCreateWindowFlags(&exflags);
 223
 224     if ( exflags )
 225     {
 226         ::SetWindowLong(GetHwnd(), GWL_EXSTYLE, exflags);
 227         ::SetWindowPos(GetHwnd(), NULL, 0, 0, 0, 0,
 228                        SWP_NOSIZE |
 229                        SWP_NOMOVE |
 230                        SWP_NOZORDER |
 231                        SWP_NOACTIVATE);
 232     }
 233
 234 #if defined(__WIN95__)
 235     // For some reason, the system menu is activated when we use the
 236     // WS_EX_CONTEXTHELP style, so let's set a reasonable icon
 237     if ( exflags & WS_EX_CONTEXTHELP )
 238     {
 239         wxFrame *winTop = wxDynamicCast(wxTheApp->GetTopWindow(), wxFrame);
 240         if ( winTop )
 241         {
 242             wxIcon icon = winTop->GetIcon();
 243             if ( icon.Ok() )
 244             {
 245                 ::SendMessage(GetHwnd(), WM_SETICON,
 246                               (WPARAM)TRUE,
 247                               (LPARAM)GetHiconOf(icon));
 248             }
 249         }
 250     }
 251 #endif // __WIN95__
 252
 253     // move the dialog to its initial position without forcing repainting
 254     int x, y, w, h;
 255     if ( MSWGetCreateWindowCoords(pos, size, x, y, w, h) )
 256     {
 257         // we can't use CW_USEDEFAULT here as we're not calling CreateWindow()
 258         // and passing CW_USEDEFAULT to MoveWindow() results in resizing the
 259         // window to (0, 0) size which breaks quite a lot of things, e.g. the
 260         // sizer calculation in wxSizer::Fit()
 261         if ( w == (int)CW_USEDEFAULT )
 262         {
 263             // the exact number doesn't matter, the dialog will be resized
 264             // again soon anyhow but it should be big enough to allow
 265             // calculation relying on "totalSize - clientSize > 0" work, i.e.
 266             // at least greater than the title bar height
 267             w =
 268             h = 100;
 269         }
 270
 271         if ( x == (int)CW_USEDEFAULT )
 272         {
 273             // well, where should we put it? maybe centre it on screen?
 274             x =
 275             y = 0;
 276         }
 277
 278         if ( !::MoveWindow(GetHwnd(), x, y, w, h, FALSE) )
 279         {
 280             wxLogLastError(wxT("MoveWindow"));
 281         }
 282     }
 283     //else: leave it at default position
 284
 285     if ( !title.empty() )
 286     {
 287         ::SetWindowText(GetHwnd(), title);
 288     }
 289
 290     SubclassWin(m_hWnd);
 291
 292     return TRUE;
 293 #endif // __WXMICROWIN__/!__WXMICROWIN__
 294 }
 295
 296 bool wxTopLevelWindowMSW::CreateFrame(const wxString& title,
 297                                       const wxPoint& pos,
 298                                       const wxSize& size)
 299 {
 300     long exflags;
 301     long flags = MSWGetCreateWindowFlags(&exflags);
 302
 303     return MSWCreate(wxCanvasClassName, title, pos, size, flags, exflags);
 304 }
 305
 306 bool wxTopLevelWindowMSW::Create(wxWindow *parent,
 307                                  wxWindowID id,
 308                                  const wxString& title,
 309                                  const wxPoint& pos,
 310                                  const wxSize& size,
 311                                  long style,
 312                                  const wxString& name)
 313 {
 314     // init our fields
 315     Init();
 316
 317     m_windowStyle = style;
 318
 319     SetName(name);
 320
 321     m_windowId = id == -1 ? NewControlId() : id;
 322
 323     wxTopLevelWindows.Append(this);
 324
 325     if ( parent )
 326         parent->AddChild(this);
 327
 328     if ( GetExtraStyle() & wxTOPLEVEL_EX_DIALOG )
 329     {
 330         // TODO: it would be better to construct the dialog template in memory
 331         //       during run-time than to rely on the limited number of
 332         //       templates in wx.rc because:
 333         //          a) you wouldn't have to include wx.rc in all wxWin programs
 334         //             (and the number of complaints about it would dtop)
 335         //          b) we'd be able to provide more templates simply, i.e.
 336         //             we could generate the templates for all style
 337         //             combinations
 338
 339         // we have different dialog templates to allows creation of dialogs
 340         // with & without captions under MSWindows, resizeable or not (but a
 341         // resizeable dialog always has caption - otherwise it would look too
 342         // strange)
 343         const wxChar *dlgTemplate;
 344         if ( style & wxRESIZE_BORDER )
 345             dlgTemplate = wxT("wxResizeableDialog");
 346         else if ( style & wxCAPTION )
 347             dlgTemplate = wxT("wxCaptionDialog");
 348         else
 349             dlgTemplate = wxT("wxNoCaptionDialog");
 350
 351         return CreateDialog(dlgTemplate, title, pos, size);
 352     }
 353     else // !dialog
 354     {
 355         return CreateFrame(title, pos, size);
 356     }
 357 }
 358
 359 wxTopLevelWindowMSW::~wxTopLevelWindowMSW()
 360 {
 361     wxTopLevelWindows.DeleteObject(this);
 362
 363     if ( wxModelessWindows.Find(this) )
 364         wxModelessWindows.DeleteObject(this);
 365
 366     // If this is the last top-level window, exit.
 367     if ( wxTheApp && (wxTopLevelWindows.Number() == 0) )
 368     {
 369         wxTheApp->SetTopWindow(NULL);
 370
 371         if ( wxTheApp->GetExitOnFrameDelete() )
 372         {
 373             ::PostQuitMessage(0);
 374         }
 375     }
 376 }
 377
 378 // ----------------------------------------------------------------------------
 379 // wxTopLevelWindowMSW geometry
 380 // ----------------------------------------------------------------------------
 381
 382 void wxTopLevelWindowMSW::DoSetClientSize(int width, int height)
 383 {
 384     HWND hWnd = GetHwnd();
 385
 386     RECT rectClient;
 387     ::GetClientRect(hWnd, &rectClient);
 388
 389     RECT rectTotal;
 390     ::GetWindowRect(hWnd, &rectTotal);
 391
 392     // Find the difference between the entire window (title bar and all)
 393     // and the client area; add this to the new client size to move the
 394     // window
 395     width += rectTotal.right - rectTotal.left - rectClient.right;
 396     height += rectTotal.bottom - rectTotal.top - rectClient.bottom;
 397
 398     // note that calling GetClientAreaOrigin() takes the toolbar into account
 399     wxPoint pt = GetClientAreaOrigin();
 400     width += pt.x;
 401     height += pt.y;
 402
 403     if ( !::MoveWindow(hWnd, rectTotal.left, rectTotal.top,
 404                        width, height, TRUE /* redraw */) )
 405     {
 406         wxLogLastError(_T("MoveWindow"));
 407     }
 408
 409     wxSizeEvent event(wxSize(width, height), m_windowId);
 410     event.SetEventObject(this);
 411     (void)GetEventHandler()->ProcessEvent(event);
 412 }
 413
 414 // ----------------------------------------------------------------------------
 415 // wxTopLevelWindowMSW showing
 416 // ----------------------------------------------------------------------------
 417
 418 void wxTopLevelWindowMSW::DoShowWindow(int nShowCmd)
 419 {
 420     ::ShowWindow(GetHwnd(), nShowCmd);
 421
 422     m_iconized = nShowCmd == SW_MINIMIZE;
 423 }
 424
 425 bool wxTopLevelWindowMSW::Show(bool show)
 426 {
 427     // don't use wxWindow version as we want to call DoShowWindow() ourselves
 428     if ( !wxWindowBase::Show(show) )
 429         return FALSE;
 430
 431     int nShowCmd;
 432     if ( show )
 433     {
 434         if ( m_maximizeOnShow )
 435         {
 436             // show and maximize
 437             nShowCmd = SW_MAXIMIZE;
 438
 439             m_maximizeOnShow = FALSE;
 440         }
 441         else // just show
 442         {
 443             nShowCmd = SW_SHOW;
 444         }
 445     }
 446     else // hide
 447     {
 448         nShowCmd = SW_HIDE;
 449     }
 450
 451     DoShowWindow(nShowCmd);
 452
 453     if ( show )
 454     {
 455         ::BringWindowToTop(GetHwnd());
 456
 457         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_windowId);
 458         event.SetEventObject( this );
 459         GetEventHandler()->ProcessEvent(event);
 460     }
 461     else // hide
 462     {
 463         // Try to highlight the correct window (the parent)
 464         if ( GetParent() )
 465         {
 466             HWND hWndParent = GetHwndOf(GetParent());
 467             if (hWndParent)
 468                 ::BringWindowToTop(hWndParent);
 469         }
 470     }
 471
 472     return TRUE;
 473 }
 474
 475 // ----------------------------------------------------------------------------
 476 // wxTopLevelWindowMSW maximize/minimize
 477 // ----------------------------------------------------------------------------
 478
 479 void wxTopLevelWindowMSW::Maximize(bool maximize)
 480 {
 481     if ( IsShown() )
 482     {
 483         // just maximize it directly
 484         DoShowWindow(maximize ? SW_MAXIMIZE : SW_RESTORE);
 485     }
 486     else // hidden
 487     {
 488         // we can't maximize the hidden frame because it shows it as well, so
 489         // just remember that we should do it later in this case
 490         m_maximizeOnShow = TRUE;
 491     }
 492 }
 493
 494 bool wxTopLevelWindowMSW::IsMaximized() const
 495 {
 496     return ::IsZoomed(GetHwnd()) != 0;
 497 }
 498
 499 void wxTopLevelWindowMSW::Iconize(bool iconize)
 500 {
 501     DoShowWindow(iconize ? SW_MINIMIZE : SW_RESTORE);
 502 }
 503
 504 bool wxTopLevelWindowMSW::IsIconized() const
 505 {
 506     // also update the current state
 507     ((wxTopLevelWindowMSW *)this)->m_iconized = ::IsIconic(GetHwnd()) != 0;
 508
 509     return m_iconized;
 510 }
 511
 512 void wxTopLevelWindowMSW::Restore()
 513 {
 514     DoShowWindow(SW_RESTORE);
 515 }
 516
 517 // ----------------------------------------------------------------------------
 518 // wxTopLevelWindowMSW fullscreen
 519 // ----------------------------------------------------------------------------
 520
 521 bool wxTopLevelWindowMSW::ShowFullScreen(bool show, long style)
 522 {
 523     if (show)
 524     {
 525         if (IsFullScreen())
 526             return FALSE;
 527
 528         m_fsIsShowing = TRUE;
 529         m_fsStyle = style;
 530
 531         // zap the frame borders
 532
 533         // save the 'normal' window style
 534         m_fsOldWindowStyle = GetWindowLong((HWND)GetHWND(), GWL_STYLE);
 535
 536         // save the old position, width & height, maximize state
 537         m_fsOldSize = GetRect();
 538         m_fsIsMaximized = IsMaximized();
 539
 540         // decide which window style flags to turn off
 541         LONG newStyle = m_fsOldWindowStyle;
 542         LONG offFlags = 0;
 543
 544         if (style & wxFULLSCREEN_NOBORDER)
 545             offFlags |= WS_BORDER | WS_THICKFRAME;
 546         if (style & wxFULLSCREEN_NOCAPTION)
 547             offFlags |= (WS_CAPTION | WS_SYSMENU);
 548
 549         newStyle &= (~offFlags);
 550
 551         // change our window style to be compatible with full-screen mode
 552         ::SetWindowLong((HWND)GetHWND(), GWL_STYLE, newStyle);
 553
 554         // resize to the size of the desktop
 555         int width, height;
 556
 557         RECT rect = wxGetWindowRect(::GetDesktopWindow());
 558         width = rect.right - rect.left;
 559         height = rect.bottom - rect.top;
 560
 561         SetSize(width, height);
 562
 563         // now flush the window style cache and actually go full-screen
 564         SetWindowPos((HWND)GetHWND(), HWND_TOP, 0, 0, width, height, SWP_FRAMECHANGED);
 565
 566         wxSizeEvent event(wxSize(width, height), GetId());
 567         GetEventHandler()->ProcessEvent(event);
 568
 569         return TRUE;
 570     }
 571     else
 572     {
 573         if (!IsFullScreen())
 574             return FALSE;
 575
 576         m_fsIsShowing = FALSE;
 577
 578         Maximize(m_fsIsMaximized);
 579         SetWindowLong((HWND)GetHWND(),GWL_STYLE, m_fsOldWindowStyle);
 580         SetWindowPos((HWND)GetHWND(),HWND_TOP,m_fsOldSize.x, m_fsOldSize.y,
 581             m_fsOldSize.width, m_fsOldSize.height, SWP_FRAMECHANGED);
 582
 583         return TRUE;
 584     }
 585 }
 586
 587 // ----------------------------------------------------------------------------
 588 // wxTopLevelWindowMSW misc
 589 // ----------------------------------------------------------------------------
 590
 591 void wxTopLevelWindowMSW::SetIcon(const wxIcon& icon)
 592 {
 593     // this sets m_icon
 594     wxTopLevelWindowBase::SetIcon(icon);
 595
 596 #if defined(__WIN95__) && !defined(__WXMICROWIN__)
 597     if ( m_icon.Ok() )
 598     {
 599         ::SendMessage(GetHwnd(), WM_SETICON,
 600                       (WPARAM)TRUE, (LPARAM)GetHiconOf(m_icon));
 601     }
 602 #endif // __WIN95__
 603 }
 604
 605 bool wxTopLevelWindowMSW::EnableCloseButton(bool enable)
 606 {
 607 #ifndef __WXMICROWIN__
 608     // get system (a.k.a. window) menu
 609     HMENU hmenu = ::GetSystemMenu(GetHwnd(), FALSE /* get it */);
 610     if ( !hmenu )
 611     {
 612         wxLogLastError(_T("GetSystemMenu"));
 613
 614         return FALSE;
 615     }
 616
 617     // enabling/disabling the close item from it also automatically
 618     // disables/enables the close title bar button
 619     if ( ::EnableMenuItem(hmenu, SC_CLOSE,
 620                           MF_BYCOMMAND |
 621                           (enable ? MF_ENABLED : MF_GRAYED)) == -1 )
 622     {
 623         wxLogLastError(_T("EnableMenuItem(SC_CLOSE)"));
 624
 625         return FALSE;
 626     }
 627
 628     // update appearance immediately
 629     if ( !::DrawMenuBar(GetHwnd()) )
 630     {
 631         wxLogLastError(_T("DrawMenuBar"));
 632     }
 633 #endif // !__WXMICROWIN__
 634
 635     return TRUE;
 636 }
 637