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