interface/wx/toplevel.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        toplevel.h
   3 // Purpose:     interface of wxTopLevelWindow
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     Styles used with wxTopLevelWindow::RequestUserAttention().
  11 */
  12 enum
  13 {
  14     wxUSER_ATTENTION_INFO = 1,  ///< Requests user attention,
  15     wxUSER_ATTENTION_ERROR = 2  ///< Results in a more drastic action.
  16 };
  17
  18 /**
  19     Styles used with wxTopLevelWindow::ShowFullScreen().
  20 */
  21 enum
  22 {
  23     wxFULLSCREEN_NOMENUBAR   = 0x0001,  ///< Don't display the menu bar.
  24     wxFULLSCREEN_NOTOOLBAR   = 0x0002,  ///< Don't display toolbar bars.
  25     wxFULLSCREEN_NOSTATUSBAR = 0x0004,  ///< Don't display the status bar.
  26     wxFULLSCREEN_NOBORDER    = 0x0008,  ///< Don't display any border.
  27     wxFULLSCREEN_NOCAPTION   = 0x0010,  ///< Don't display a caption.
  28
  29     /**
  30         Combination of all above, will display the least possible.
  31     */
  32     wxFULLSCREEN_ALL    = wxFULLSCREEN_NOMENUBAR | wxFULLSCREEN_NOTOOLBAR |
  33                           wxFULLSCREEN_NOSTATUSBAR | wxFULLSCREEN_NOBORDER |
  34                           wxFULLSCREEN_NOCAPTION
  35 };
  36
  37 #define wxDEFAULT_FRAME_STYLE (wxSYSTEM_MENU |          \
  38                                wxRESIZE_BORDER |        \
  39                                wxMINIMIZE_BOX |         \
  40                                wxMAXIMIZE_BOX |         \
  41                                wxCLOSE_BOX |            \
  42                                wxCAPTION |              \
  43                                wxCLIP_CHILDREN)
  44
  45 /**
  46     @class wxTopLevelWindow
  47
  48     wxTopLevelWindow is a common base class for wxDialog and wxFrame. It is an
  49     abstract base class meaning that you never work with objects of this class
  50     directly, but all of its methods are also applicable for the two classes
  51     above.
  52
  53     Note that the instances of wxTopLevelWindow are managed by wxWidgets in the
  54     internal top level window list.
  55
  56     @beginEventEmissionTable
  57     @event{EVT_MAXIMIZE(id, func)}
  58         Process a @c wxEVT_MAXIMIZE event. See wxMaximizeEvent.
  59     @event{EVT_MOVE(func)}
  60         Process a @c wxEVT_MOVE event, which is generated when a window is moved.
  61         See wxMoveEvent.
  62     @event{EVT_MOVE_START(func)}
  63         Process a @c wxEVT_MOVE_START event, which is generated when the user starts
  64         to move or size a window. wxMSW only.
  65         See wxMoveEvent.
  66     @event{EVT_MOVE_END(func)}
  67         Process a @c wxEVT_MOVE_END event, which is generated when the user stops
  68         moving or sizing a window. wxMSW only.
  69         See wxMoveEvent.
  70     @event{EVT_SHOW(func)}
  71         Process a @c wxEVT_SHOW event. See wxShowEvent.
  72     @endEventTable
  73
  74     @library{wxcore}
  75     @category{managedwnd}
  76
  77     @see wxDialog, wxFrame
  78 */
  79 class wxTopLevelWindow : public wxNonOwnedWindow
  80 {
  81 public:
  82     /**
  83         Default ctor.
  84     */
  85     wxTopLevelWindow();
  86
  87     /**
  88         Constructor creating the top level window.
  89     */
  90     wxTopLevelWindow(wxWindow *parent,
  91                     wxWindowID id,
  92                     const wxString& title,
  93                     const wxPoint& pos = wxDefaultPosition,
  94                     const wxSize& size = wxDefaultSize,
  95                     long style = wxDEFAULT_FRAME_STYLE,
  96                     const wxString& name = wxFrameNameStr);
  97
  98     /**
  99         Destructor. Remember that wxTopLevelWindows do not get immediately
 100         destroyed when the user (or the app) closes them; they have a
 101         @b delayed destruction.
 102
 103         See @ref overview_windowdeletion for more info.
 104     */
 105     virtual ~wxTopLevelWindow();
 106
 107     /**
 108         Creates the top level window.
 109     */
 110     bool Create(wxWindow *parent,
 111                 wxWindowID id,
 112                 const wxString& title,
 113                 const wxPoint& pos = wxDefaultPosition,
 114                 const wxSize& size = wxDefaultSize,
 115                 long style = wxDEFAULT_FRAME_STYLE,
 116                 const wxString& name = wxFrameNameStr);
 117
 118     /**
 119         Returns @true if the platform supports making the window translucent.
 120
 121         @see SetTransparent()
 122     */
 123     virtual bool CanSetTransparent();
 124
 125     /**
 126         A synonym for CentreOnScreen().
 127     */
 128     void CenterOnScreen(int direction = wxBOTH);
 129
 130     /**
 131         Centres the window on screen.
 132
 133         @param direction
 134             Specifies the direction for the centering. May be @c wxHORIZONTAL,
 135             @c wxVERTICAL or @c wxBOTH.
 136
 137         @see wxWindow::CentreOnParent()
 138     */
 139     void CentreOnScreen(int direction = wxBOTH);
 140
 141     /**
 142         Enables or disables the Close button (most often in the right upper
 143         corner of a dialog) and the Close entry of the system menu (most often
 144         in the left upper corner of the dialog).
 145
 146         Currently only implemented for wxMSW and wxGTK.
 147
 148         Returns @true if operation was successful. This may be wrong on X11
 149         (including GTK+) where the window manager may not support this operation
 150         and there is no way to find out.
 151     */
 152     virtual bool EnableCloseButton(bool enable = true);
 153
 154     /**
 155         Returns a pointer to the button which is the default for this window, or
 156         @c @NULL. The default button is the one activated by pressing the Enter
 157         key.
 158     */
 159     wxWindow* GetDefaultItem() const;
 160
 161     /**
 162         Get the default size for a new top level window.
 163
 164         This is used internally by wxWidgets on some platforms to determine the
 165         default size for a window created using ::wxDefaultSize so it is not
 166         necessary to use it when creating a wxTopLevelWindow, however it may be
 167         useful if a rough estimation of the window size is needed for some
 168         other reason.
 169
 170         @since 2.9.2
 171      */
 172     static wxSize GetDefaultSize();
 173
 174     /**
 175         Returns the standard icon of the window. The icon will be invalid if it
 176         hadn't been previously set by SetIcon().
 177
 178         @see GetIcons()
 179     */
 180     wxIcon GetIcon() const;
 181
 182     /**
 183         Returns all icons associated with the window, there will be none of them
 184         if neither SetIcon() nor SetIcons() had been called before. Use
 185         GetIcon() to get the main icon of the window.
 186
 187         @see wxIconBundle
 188     */
 189     const wxIconBundle& GetIcons() const;
 190
 191     /**
 192         Gets a string containing the window title.
 193
 194         @see SetTitle()
 195     */
 196     virtual wxString GetTitle() const;
 197
 198     /**
 199         Unique to the wxWinCE port. Responds to showing/hiding SIP (soft input
 200         panel) area and resize window accordingly. Override this if you want to
 201         avoid resizing or do additional operations.
 202     */
 203     virtual bool HandleSettingChange(WXWPARAM wParam,
 204                                      WXLPARAM lParam);
 205
 206     /**
 207         Iconizes or restores the window.
 208
 209         @param iconize
 210             If @true, iconizes the window; if @false, shows and restores it.
 211
 212         @see IsIconized(), Maximize(), wxIconizeEvent.
 213     */
 214     virtual void Iconize(bool iconize = true);
 215
 216     /**
 217         Returns @true if this window is currently active, i.e. if the user is
 218         currently working with it.
 219     */
 220     virtual bool IsActive();
 221
 222     /**
 223         Returns @true if this window is expected to be always maximized, either
 224         due to platform policy or due to local policy regarding particular
 225         class.
 226     */
 227     virtual bool IsAlwaysMaximized() const;
 228
 229     /**
 230         Returns @true if the window is in fullscreen mode.
 231
 232         @see ShowFullScreen()
 233     */
 234     virtual bool IsFullScreen() const;
 235
 236     /**
 237         Returns @true if the window is iconized.
 238     */
 239     virtual bool IsIconized() const;
 240
 241     /**
 242         Returns @true if the window is maximized.
 243     */
 244     virtual bool IsMaximized() const;
 245
 246     /**
 247         This method is specific to wxUniversal port.
 248
 249         Returns @true if this window is using native decorations, @false if we
 250         draw them ourselves.
 251
 252         @see UseNativeDecorations(),
 253              UseNativeDecorationsByDefault()
 254     */
 255     bool IsUsingNativeDecorations() const;
 256
 257     /**
 258         See wxWindow::SetAutoLayout(): when auto layout is on, this function gets
 259         called automatically when the window is resized.
 260     */
 261     virtual bool Layout();
 262
 263     /**
 264         Maximizes or restores the window.
 265
 266         @param maximize
 267             If @true, maximizes the window, otherwise it restores it.
 268
 269         @see Iconize()
 270     */
 271     virtual void Maximize(bool maximize = true);
 272
 273     /**
 274         MSW-specific function for accessing the system menu.
 275
 276         Returns a wxMenu pointer representing the system menu of the window
 277         under MSW. The returned wxMenu may be used, if non-@c NULL, to add
 278         extra items to the system menu. The usual @c wxEVT_COMMAND_MENU_SELECTED
 279         events (that can be processed using @c EVT_MENU event table macro) will
 280         then be generated for them. All the other wxMenu methods may be used as
 281         well but notice that they won't allow you to access any standard system
 282         menu items (e.g. they can't be deleted or modified in any way
 283         currently).
 284
 285         Notice that because of the native system limitations the identifiers of
 286         the items added to the system menu must be multiples of 16, otherwise
 287         no events will be generated for them.
 288
 289         The returned pointer must @em not be deleted, it is owned by the window
 290         and will be only deleted when the window itself is destroyed.
 291
 292         This function is not available in the other ports by design, any
 293         occurrences of it in the portable code must be guarded by
 294         @code #ifdef __WXMSW__ @endcode preprocessor guards.
 295
 296         @since 2.9.3
 297      */
 298     wxMenu *MSWGetSystemMenu() const;
 299
 300     /**
 301         Use a system-dependent way to attract users attention to the window when
 302         it is in background.
 303
 304         @a flags may have the value of either @c ::wxUSER_ATTENTION_INFO
 305         (default) or @c ::wxUSER_ATTENTION_ERROR which results in a more drastic
 306         action. When in doubt, use the default value.
 307
 308
 309         @note This function should normally be only used when the application
 310               is not already in foreground.
 311
 312         This function is currently implemented for Win32 where it flashes
 313         the window icon in the taskbar, and for wxGTK with task bars
 314         supporting it.
 315
 316     */
 317     virtual void RequestUserAttention(int flags = wxUSER_ATTENTION_INFO);
 318
 319     /**
 320         Changes the default item for the panel, usually @a win is a button.
 321
 322         @see GetDefaultItem()
 323     */
 324     wxWindow* SetDefaultItem(wxWindow* win);
 325
 326
 327     wxWindow*  SetTmpDefaultItem(wxWindow * win);
 328     wxWindow* GetTmpDefaultItem() const;
 329
 330
 331     /**
 332         Sets the icon for this window.
 333
 334         @param icon
 335             The wxIcon to associate with this window.
 336
 337         @remarks The window takes a 'copy' of @a icon, but since it uses
 338                  reference counting, the copy is very quick. It is safe to
 339                  delete @a icon after calling this function.
 340
 341         @note In wxMSW, @a icon must be either 16x16 or 32x32 icon.
 342
 343         @see wxIcon, SetIcons()
 344     */
 345     void SetIcon(const wxIcon& icon);
 346
 347     /**
 348         Sets several icons of different sizes for this window: this allows to
 349         use different icons for different situations (e.g. task switching bar,
 350         taskbar, window title bar) instead of scaling, with possibly bad looking
 351         results, the only icon set by SetIcon().
 352
 353         @param icons
 354             The icons to associate with this window.
 355
 356         @note In wxMSW, @a icons must contain a 16x16 or 32x32 icon,
 357               preferably both.
 358
 359         @see wxIconBundle
 360     */
 361     virtual void SetIcons(const wxIconBundle& icons);
 362
 363     /**
 364         Sets action or menu activated by pressing left hardware button on the
 365         smart phones. Unavailable on full keyboard machines.
 366
 367         @param id
 368             Identifier for this button.
 369         @param label
 370             Text to be displayed on the screen area dedicated to this hardware
 371             button.
 372         @param subMenu
 373             The menu to be opened after pressing this hardware button.
 374
 375         @see SetRightMenu().
 376     */
 377     void SetLeftMenu(int id = wxID_ANY,
 378                      const wxString& label = wxEmptyString,
 379                      wxMenu* subMenu = NULL);
 380
 381     /**
 382         A simpler interface for setting the size hints than SetSizeHints().
 383     */
 384     virtual void SetMaxSize(const wxSize& size);
 385
 386     /**
 387         A simpler interface for setting the size hints than SetSizeHints().
 388     */
 389     virtual void SetMinSize(const wxSize& size);
 390
 391     /**
 392         Sets action or menu activated by pressing right hardware button on the
 393         smart phones. Unavailable on full keyboard machines.
 394
 395         @param id
 396             Identifier for this button.
 397         @param label
 398             Text to be displayed on the screen area dedicated to this hardware
 399             button.
 400         @param subMenu
 401             The menu to be opened after pressing this hardware button.
 402
 403         @see SetLeftMenu().
 404     */
 405     void SetRightMenu(int id = wxID_ANY,
 406                       const wxString& label = wxEmptyString,
 407                       wxMenu* subMenu = NULL);
 408
 409     /**
 410         Allows specification of minimum and maximum window sizes, and window
 411         size increments. If a pair of values is not set (or set to -1), no
 412         constraints will be used.
 413
 414         @param minW
 415             The minimum width.
 416         @param minH
 417             The minimum height.
 418         @param maxW
 419             The maximum width.
 420         @param maxH
 421             The maximum height.
 422         @param incW
 423             Specifies the increment for sizing the width (GTK/Motif/Xt only).
 424         @param incH
 425             Specifies the increment for sizing the height (GTK/Motif/Xt only).
 426
 427         @remarks Notice that this function not only prevents the user from
 428                  resizing the window outside the given bounds but it also
 429                  prevents the program itself from doing it using
 430                  wxWindow::SetSize().
 431
 432     */
 433     virtual void SetSizeHints(int minW, int minH,
 434                               int maxW = -1, int maxH = -1,
 435                               int incW = -1, int incH = -1);
 436
 437     /**
 438         Allows specification of minimum and maximum window sizes, and window
 439         size increments. If a pair of values is not set (or set to -1), no
 440         constraints will be used.
 441
 442         @param minSize
 443             The minimum size of the window.
 444         @param maxSize
 445             The maximum size of the window.
 446         @param incSize
 447             Increment size (only taken into account under X11-based ports such
 448             as wxGTK/wxMotif/wxX11).
 449
 450         @remarks Notice that this function not only prevents the user from
 451                  resizing the window outside the given bounds but it also
 452                  prevents the program itself from doing it using
 453                  wxWindow::SetSize().
 454     */
 455     void SetSizeHints(const wxSize& minSize,
 456                       const wxSize& maxSize = wxDefaultSize,
 457                       const wxSize& incSize = wxDefaultSize);
 458
 459     /**
 460         Sets the window title.
 461
 462         @param title
 463             The window title.
 464
 465         @see GetTitle()
 466     */
 467     virtual void SetTitle(const wxString& title);
 468
 469     /**
 470         If the platform supports it will set the window to be translucent.
 471
 472         @param alpha
 473             Determines how opaque or transparent the window will be, if the
 474             platform supports the operation. A value of 0 sets the window to be
 475             fully transparent, and a value of 255 sets the window to be fully
 476             opaque.
 477     */
 478     virtual bool SetTransparent(wxByte alpha);
 479
 480     /**
 481         This virtual function is not meant to be called directly but can be
 482         overridden to return @false (it returns @true by default) to allow the
 483         application to close even if this, presumably not very important, window
 484         is still opened. By default, the application stays alive as long as
 485         there are any open top level windows.
 486     */
 487     virtual bool ShouldPreventAppExit() const;
 488
 489     /**
 490         This function sets the wxTopLevelWindow's modified state on OS X,
 491         which currently draws a black dot in the wxTopLevelWindow's close button.
 492         On other platforms, this method does nothing.
 493
 494         @see OSXIsModified()
 495     */
 496     virtual void OSXSetModified(bool modified);
 497
 498     /**
 499         Returns the current modified state of the wxTopLevelWindow on OS X.
 500         On other platforms, this method does nothing.
 501
 502         @see OSXSetModified()
 503     */
 504     virtual bool OSXIsModified() const;
 505
 506     /**
 507         Sets the file name represented by this wxTopLevelWindow.
 508
 509         Under OS X, this file name is used to set the "proxy icon", which
 510         appears in the window title bar near its title, corresponding to this
 511         file name. Under other platforms it currently doesn't do anything but
 512         it is harmless to call it now and it might be implemented to do
 513         something useful in the future so you're encouraged to use it for any
 514         window representing a file-based document.
 515
 516         @since 2.9.4
 517     */
 518     virtual void SetRepresentedFilename(const wxString& filename);
 519
 520     /**
 521         Show the wxTopLevelWindow, but do not give it keyboard focus. This can be
 522         used for pop up or notification windows that should not steal the current
 523         focus.
 524      */
 525     virtual void ShowWithoutActivating();
 526
 527     /**
 528         Depending on the value of @a show parameter the window is either shown
 529         full screen or restored to its normal state. @a style is a bit list
 530         containing some or all of the following values, which indicate what
 531         elements of the window to hide in full-screen mode:
 532
 533         - @c ::wxFULLSCREEN_NOMENUBAR
 534         - @c ::wxFULLSCREEN_NOTOOLBAR
 535         - @c ::wxFULLSCREEN_NOSTATUSBAR
 536         - @c ::wxFULLSCREEN_NOBORDER
 537         - @c ::wxFULLSCREEN_NOCAPTION
 538         - @c ::wxFULLSCREEN_ALL (all of the above)
 539
 540         This function has not been tested with MDI frames.
 541
 542         @note Showing a window full screen also actually @ref wxWindow::Show()
 543               "Show()"s the window if it isn't shown.
 544
 545         @see IsFullScreen()
 546     */
 547     virtual bool ShowFullScreen(bool show, long style = wxFULLSCREEN_ALL);
 548
 549     /**
 550         This method is specific to wxUniversal port.
 551
 552         Use native or custom-drawn decorations for this window only. Notice that
 553         to have any effect this method must be called before really creating the
 554         window, i.e. two step creation must be used:
 555
 556         @code
 557         MyFrame *frame = new MyFrame;       // use default ctor
 558         frame->UseNativeDecorations(false); // change from default "true"
 559         frame->Create(parent, title, ...);  // really create the frame
 560         @endcode
 561
 562         @see UseNativeDecorationsByDefault(),
 563              IsUsingNativeDecorations()
 564     */
 565     void UseNativeDecorations(bool native = true);
 566
 567     /**
 568         This method is specific to wxUniversal port.
 569
 570         Top level windows in wxUniversal port can use either system-provided
 571         window decorations (i.e. title bar and various icons, buttons and menus
 572         in it) or draw the decorations themselves. By default the system
 573         decorations are used if they are available, but this method can be
 574         called with @a native set to @false to change this for all windows
 575         created after this point.
 576
 577         Also note that if @c WXDECOR environment variable is set, then custom
 578         decorations are used by default and so it may make sense to call this
 579         method with default argument if the application can't use custom
 580         decorations at all for some reason.
 581
 582         @see UseNativeDecorations()
 583     */
 584     void UseNativeDecorationsByDefault(bool native = true);
 585 };
 586