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         x =
 258         w = (int)CW_USEDEFAULT;
 259     }
 260
 261     // we can't use CW_USEDEFAULT here as we're not calling CreateWindow()
 262     // and passing CW_USEDEFAULT to MoveWindow() results in resizing the
 263     // window to (0, 0) size which breaks quite a lot of things, e.g. the
 264     // sizer calculation in wxSizer::Fit()
 265     if ( w == (int)CW_USEDEFAULT )
 266     {
 267         // the exact number doesn't matter, the dialog will be resized
 268         // again soon anyhow but it should be big enough to allow
 269         // calculation relying on "totalSize - clientSize > 0" work, i.e.
 270         // at least greater than the title bar height
 271         w =
 272         h = 100;
 273     }
 274
 275     if ( x == (int)CW_USEDEFAULT )
 276     {
 277         // centre it on the screen - what else can we do?
 278         wxSize sizeDpy = wxGetDisplaySize();
 279
 280         x = (sizeDpy.x - w) / 2;
 281         y = (sizeDpy.y - h) / 2;
 282     }
 283
 284     if ( !::MoveWindow(GetHwnd(), x, y, w, h, FALSE) )
 285     {
 286         wxLogLastError(wxT("MoveWindow"));
 287     }
 288
 289     if ( !title.empty() )
 290     {
 291         ::SetWindowText(GetHwnd(), title);
 292     }
 293
 294     SubclassWin(m_hWnd);
 295
 296     return TRUE;
 297 #endif // __WXMICROWIN__/!__WXMICROWIN__
 298 }
 299
 300 bool wxTopLevelWindowMSW::CreateFrame(const wxString& title,
 301                                       const wxPoint& pos,
 302                                       const wxSize& size)
 303 {
 304     long exflags;
 305     long flags = MSWGetCreateWindowFlags(&exflags);
 306
 307     return MSWCreate(wxCanvasClassName, title, pos, size, flags, exflags);
 308 }
 309
 310 bool wxTopLevelWindowMSW::Create(wxWindow *parent,
 311                                  wxWindowID id,
 312                                  const wxString& title,
 313                                  const wxPoint& pos,
 314                                  const wxSize& size,
 315                                  long style,
 316                                  const wxString& name)
 317 {
 318     // init our fields
 319     Init();
 320
 321     m_windowStyle = style;
 322
 323     SetName(name);
 324
 325     m_windowId = id == -1 ? NewControlId() : id;
 326
 327     wxTopLevelWindows.Append(this);
 328
 329     if ( parent )
 330         parent->AddChild(this);
 331
 332     if ( GetExtraStyle() & wxTOPLEVEL_EX_DIALOG )
 333     {
 334         // TODO: it would be better to construct the dialog template in memory
 335         //       during run-time than to rely on the limited number of
 336         //       templates in wx.rc because:
 337         //          a) you wouldn't have to include wx.rc in all wxWin programs
 338         //             (and the number of complaints about it would dtop)
 339         //          b) we'd be able to provide more templates simply, i.e.
 340         //             we could generate the templates for all style
 341         //             combinations
 342
 343         // we have different dialog templates to allows creation of dialogs
 344         // with & without captions under MSWindows, resizeable or not (but a
 345         // resizeable dialog always has caption - otherwise it would look too
 346         // strange)
 347         const wxChar *dlgTemplate;
 348         if ( style & wxRESIZE_BORDER )
 349             dlgTemplate = wxT("wxResizeableDialog");
 350         else if ( style & wxCAPTION )
 351             dlgTemplate = wxT("wxCaptionDialog");
 352         else
 353             dlgTemplate = wxT("wxNoCaptionDialog");
 354
 355         return CreateDialog(dlgTemplate, title, pos, size);
 356     }
 357     else // !dialog
 358     {
 359         return CreateFrame(title, pos, size);
 360     }
 361 }
 362
 363 wxTopLevelWindowMSW::~wxTopLevelWindowMSW()
 364 {
 365     wxTopLevelWindows.DeleteObject(this);
 366
 367     if ( wxModelessWindows.Find(this) )
 368         wxModelessWindows.DeleteObject(this);
 369
 370     // If this is the last top-level window, exit.
 371     if ( wxTheApp && (wxTopLevelWindows.Number() == 0) )
 372     {
 373         wxTheApp->SetTopWindow(NULL);
 374
 375         if ( wxTheApp->GetExitOnFrameDelete() )
 376         {
 377             ::PostQuitMessage(0);
 378         }
 379     }
 380 }
 381
 382 // ----------------------------------------------------------------------------
 383 // wxTopLevelWindowMSW geometry
 384 // ----------------------------------------------------------------------------
 385
 386 void wxTopLevelWindowMSW::DoSetClientSize(int width, int height)
 387 {
 388     HWND hWnd = GetHwnd();
 389
 390     RECT rectClient;
 391     ::GetClientRect(hWnd, &rectClient);
 392
 393     RECT rectTotal;
 394     ::GetWindowRect(hWnd, &rectTotal);
 395
 396     // Find the difference between the entire window (title bar and all)
 397     // and the client area; add this to the new client size to move the
 398     // window
 399     width += rectTotal.right - rectTotal.left - rectClient.right;
 400     height += rectTotal.bottom - rectTotal.top - rectClient.bottom;
 401
 402     // note that calling GetClientAreaOrigin() takes the toolbar into account
 403     wxPoint pt = GetClientAreaOrigin();
 404     width += pt.x;
 405     height += pt.y;
 406
 407     if ( !::MoveWindow(hWnd, rectTotal.left, rectTotal.top,
 408                        width, height, TRUE /* redraw */) )
 409     {
 410         wxLogLastError(_T("MoveWindow"));
 411     }
 412
 413     wxSizeEvent event(wxSize(width, height), m_windowId);
 414     event.SetEventObject(this);
 415     (void)GetEventHandler()->ProcessEvent(event);
 416 }
 417
 418 // ----------------------------------------------------------------------------
 419 // wxTopLevelWindowMSW showing
 420 // ----------------------------------------------------------------------------
 421
 422 void wxTopLevelWindowMSW::DoShowWindow(int nShowCmd)
 423 {
 424     ::ShowWindow(GetHwnd(), nShowCmd);
 425
 426     m_iconized = nShowCmd == SW_MINIMIZE;
 427 }
 428
 429 bool wxTopLevelWindowMSW::Show(bool show)
 430 {
 431     // don't use wxWindow version as we want to call DoShowWindow() ourselves
 432     if ( !wxWindowBase::Show(show) )
 433         return FALSE;
 434
 435     int nShowCmd;
 436     if ( show )
 437     {
 438         if ( m_maximizeOnShow )
 439         {
 440             // show and maximize
 441             nShowCmd = SW_MAXIMIZE;
 442
 443             m_maximizeOnShow = FALSE;
 444         }
 445         else // just show
 446         {
 447             nShowCmd = SW_SHOW;
 448         }
 449     }
 450     else // hide
 451     {
 452         nShowCmd = SW_HIDE;
 453     }
 454
 455     DoShowWindow(nShowCmd);
 456
 457     if ( show )
 458     {
 459         ::BringWindowToTop(GetHwnd());
 460
 461         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_windowId);
 462         event.SetEventObject( this );
 463         GetEventHandler()->ProcessEvent(event);
 464     }
 465     else // hide
 466     {
 467         // Try to highlight the correct window (the parent)
 468         if ( GetParent() )
 469         {
 470             HWND hWndParent = GetHwndOf(GetParent());
 471             if (hWndParent)
 472                 ::BringWindowToTop(hWndParent);
 473         }
 474     }
 475
 476     return TRUE;
 477 }
 478
 479 // ----------------------------------------------------------------------------
 480 // wxTopLevelWindowMSW maximize/minimize
 481 // ----------------------------------------------------------------------------
 482
 483 void wxTopLevelWindowMSW::Maximize(bool maximize)
 484 {
 485     if ( IsShown() )
 486     {
 487         // just maximize it directly
 488         DoShowWindow(maximize ? SW_MAXIMIZE : SW_RESTORE);
 489     }
 490     else // hidden
 491     {
 492         // we can't maximize the hidden frame because it shows it as well, so
 493         // just remember that we should do it later in this case
 494         m_maximizeOnShow = TRUE;
 495     }
 496 }
 497
 498 bool wxTopLevelWindowMSW::IsMaximized() const
 499 {
 500     return ::IsZoomed(GetHwnd()) != 0;
 501 }
 502
 503 void wxTopLevelWindowMSW::Iconize(bool iconize)
 504 {
 505     DoShowWindow(iconize ? SW_MINIMIZE : SW_RESTORE);
 506 }
 507
 508 bool wxTopLevelWindowMSW::IsIconized() const
 509 {
 510     // also update the current state
 511     ((wxTopLevelWindowMSW *)this)->m_iconized = ::IsIconic(GetHwnd()) != 0;
 512
 513     return m_iconized;
 514 }
 515
 516 void wxTopLevelWindowMSW::Restore()
 517 {
 518     DoShowWindow(SW_RESTORE);
 519 }
 520
 521 // ----------------------------------------------------------------------------
 522 // wxTopLevelWindowMSW fullscreen
 523 // ----------------------------------------------------------------------------
 524
 525 bool wxTopLevelWindowMSW::ShowFullScreen(bool show, long style)
 526 {
 527     if (show)
 528     {
 529         if (IsFullScreen())
 530             return FALSE;
 531
 532         m_fsIsShowing = TRUE;
 533         m_fsStyle = style;
 534
 535         // zap the frame borders
 536
 537         // save the 'normal' window style
 538         m_fsOldWindowStyle = GetWindowLong((HWND)GetHWND(), GWL_STYLE);
 539
 540         // save the old position, width & height, maximize state
 541         m_fsOldSize = GetRect();
 542         m_fsIsMaximized = IsMaximized();
 543
 544         // decide which window style flags to turn off
 545         LONG newStyle = m_fsOldWindowStyle;
 546         LONG offFlags = 0;
 547
 548         if (style & wxFULLSCREEN_NOBORDER)
 549             offFlags |= WS_BORDER | WS_THICKFRAME;
 550         if (style & wxFULLSCREEN_NOCAPTION)
 551             offFlags |= (WS_CAPTION | WS_SYSMENU);
 552
 553         newStyle &= (~offFlags);
 554
 555         // change our window style to be compatible with full-screen mode
 556         ::SetWindowLong((HWND)GetHWND(), GWL_STYLE, newStyle);
 557
 558         // resize to the size of the desktop
 559         int width, height;
 560
 561         RECT rect = wxGetWindowRect(::GetDesktopWindow());
 562         width = rect.right - rect.left;
 563         height = rect.bottom - rect.top;
 564
 565         SetSize(width, height);
 566
 567         // now flush the window style cache and actually go full-screen
 568         SetWindowPos((HWND)GetHWND(), HWND_TOP, 0, 0, width, height, SWP_FRAMECHANGED);
 569
 570         wxSizeEvent event(wxSize(width, height), GetId());
 571         GetEventHandler()->ProcessEvent(event);
 572
 573         return TRUE;
 574     }
 575     else
 576     {
 577         if (!IsFullScreen())
 578             return FALSE;
 579
 580         m_fsIsShowing = FALSE;
 581
 582         Maximize(m_fsIsMaximized);
 583         SetWindowLong((HWND)GetHWND(),GWL_STYLE, m_fsOldWindowStyle);
 584         SetWindowPos((HWND)GetHWND(),HWND_TOP,m_fsOldSize.x, m_fsOldSize.y,
 585             m_fsOldSize.width, m_fsOldSize.height, SWP_FRAMECHANGED);
 586
 587         return TRUE;
 588     }
 589 }
 590
 591 // ----------------------------------------------------------------------------
 592 // wxTopLevelWindowMSW misc
 593 // ----------------------------------------------------------------------------
 594
 595 void wxTopLevelWindowMSW::SetIcon(const wxIcon& icon)
 596 {
 597     // this sets m_icon
 598     wxTopLevelWindowBase::SetIcon(icon);
 599
 600 #if defined(__WIN95__) && !defined(__WXMICROWIN__)
 601     if ( m_icon.Ok() )
 602     {
 603         ::SendMessage(GetHwnd(), WM_SETICON,
 604                       (WPARAM)TRUE, (LPARAM)GetHiconOf(m_icon));
 605     }
 606 #endif // __WIN95__
 607 }
 608
 609 bool wxTopLevelWindowMSW::EnableCloseButton(bool enable)
 610 {
 611 #ifndef __WXMICROWIN__
 612     // get system (a.k.a. window) menu
 613     HMENU hmenu = ::GetSystemMenu(GetHwnd(), FALSE /* get it */);
 614     if ( !hmenu )
 615     {
 616         wxLogLastError(_T("GetSystemMenu"));
 617
 618         return FALSE;
 619     }
 620
 621     // enabling/disabling the close item from it also automatically
 622     // disables/enables the close title bar button
 623     if ( ::EnableMenuItem(hmenu, SC_CLOSE,
 624                           MF_BYCOMMAND |
 625                           (enable ? MF_ENABLED : MF_GRAYED)) == -1 )
 626     {
 627         wxLogLastError(_T("EnableMenuItem(SC_CLOSE)"));
 628
 629         return FALSE;
 630     }
 631
 632     // update appearance immediately
 633     if ( !::DrawMenuBar(GetHwnd()) )
 634     {
 635         wxLogLastError(_T("DrawMenuBar"));
 636     }
 637 #endif // !__WXMICROWIN__
 638
 639     return TRUE;
 640 }
 641