Source

wxPython / wx / lib / agw / ribbon / bar.py

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
# --------------------------------------------------------------------------- #
# RIBBONBAR Library wxPython IMPLEMENTATION
#
# Original C++ Code From Peter Cawley.
#
# Current wxRibbon Version Tracked: wxWidgets 2.9.0 SVN HEAD
#
#
# Python Code By:
#
# Andrea Gavana, @ 15 Oct 2009
# Latest Revision: 17 Aug 2011, 15.00 GMT
#
# For All Kind Of Problems, Requests Of Enhancements And Bug Reports, Please
# Write To Me At:
#
# andrea.gavana@gmail.com
# andrea.gavana@maerskoil.com
#
# Or, Obviously, To The wxPython Mailing List!!!
#
# End Of Comments
# --------------------------------------------------------------------------- #

"""
Top-level control in a ribbon user interface.


Description
===========

Serves as a tabbed container for L{RibbonPage} - a ribbon user interface typically
has a ribbon bar, which contains one or more RibbonPages, which in turn each contains
one or more RibbonPanels, which in turn contain controls. While a L{RibbonBar} has
tabs similar to a `wx.Notebook`, it does not follow the same API for adding pages.
Containers like `wx.Notebook` can contain any type of window as a page, hence the
normal procedure is to create the sub-window and then call `wx.BookCtrlBase.AddPage()`.

As L{RibbonBar} can only have L{RibbonPage} as children (and a L{RibbonPage} can only
have a L{RibbonBar} as parent), when a page is created, it is automatically added to
the bar - there is no `AddPage` equivalent to call.

After all pages have been created, and all controls and panels placed on those pages,
L{Realize} must be called.


Window Styles
=============

This class supports the following window styles:

========================================== =========== ==========================================
Window Styles                              Hex Value   Description
========================================== =========== ==========================================
``RIBBON_BAR_DEFAULT_STYLE``                       0x9 Defined as ``RIBBON_BAR_FLOW_HORIZONTAL`` | ``RIBBON_BAR_SHOW_PAGE_LABELS`` | ``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS``
``RIBBON_BAR_FOLDBAR_STYLE``                      0x1e Defined as ``RIBBON_BAR_FLOW_VERTICAL`` | ``RIBBON_BAR_SHOW_PAGE_ICONS`` | ``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS`` | ``RIBBON_BAR_SHOW_PANEL_MINIMISE_BUTTONS``
``RIBBON_BAR_SHOW_PAGE_LABELS``                    0x1 Causes labels to be shown on the tabs in the ribbon bar.
``RIBBON_BAR_SHOW_PAGE_ICONS``                     0x2 Causes icons to be shown on the tabs in the ribbon bar.
``RIBBON_BAR_FLOW_HORIZONTAL``                     0x0 Causes panels within pages to stack horizontally.
``RIBBON_BAR_FLOW_VERTICAL``                       0x4 Causes panels within pages to stack vertically.
``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS``              0x8 Causes extension buttons to be shown on panels (where the panel has such a button).
``RIBBON_BAR_SHOW_PANEL_MINIMISE_BUTTONS``        0x10 Causes minimise buttons to be shown on panels (where the panel has such a button).
========================================== =========== ==========================================


Events Processing
=================

This class processes the following events:

================================= =================================
Event Name                        Description
================================= =================================
``EVT_RIBBONBAR_PAGE_CHANGED``    Triggered after the transition from one page being active to a different page being active.
``EVT_RIBBONBAR_PAGE_CHANGING``   Triggered prior to the transition from one page being active to a different page being active, and can veto the change.
``EVT_RIBBONBAR_TAB_MIDDLE_DOWN`` Triggered when the middle mouse button is pressed on a tab.
``EVT_RIBBONBAR_TAB_MIDDLE_UP``   Triggered when the middle mouse button is released on a tab.
``EVT_RIBBONBAR_TAB_RIGHT_DOWN``  Triggered when the right mouse button is pressed on a tab.
``EVT_RIBBONBAR_TAB_RIGHT_UP``    Triggered when the right mouse button is released on a tab.
``EVT_RIBBONBAR_TAB_LEFT_DCLICK`` Triggered when the user double-clicks on a tab.
================================= =================================


See Also
========

L{RibbonPage}, L{RibbonPanel}
"""


import wx
import types

from control import RibbonControl

from art_internal import RibbonPageTabInfo
from art_msw import RibbonMSWArtProvider
from art import *

wxEVT_COMMAND_RIBBONBAR_PAGE_CHANGED = wx.NewEventType()
wxEVT_COMMAND_RIBBONBAR_PAGE_CHANGING = wx.NewEventType()
wxEVT_COMMAND_RIBBONBAR_TAB_MIDDLE_DOWN = wx.NewEventType()
wxEVT_COMMAND_RIBBONBAR_TAB_MIDDLE_UP = wx.NewEventType()
wxEVT_COMMAND_RIBBONBAR_TAB_RIGHT_DOWN = wx.NewEventType()
wxEVT_COMMAND_RIBBONBAR_TAB_RIGHT_UP = wx.NewEventType()
wxEVT_COMMAND_RIBBONBAR_TAB_LEFT_DCLICK = wx.NewEventType()

EVT_RIBBONBAR_PAGE_CHANGED = wx.PyEventBinder(wxEVT_COMMAND_RIBBONBAR_PAGE_CHANGED, 1)
EVT_RIBBONBAR_PAGE_CHANGING = wx.PyEventBinder(wxEVT_COMMAND_RIBBONBAR_PAGE_CHANGING, 1)
EVT_RIBBONBAR_TAB_MIDDLE_DOWN = wx.PyEventBinder(wxEVT_COMMAND_RIBBONBAR_TAB_MIDDLE_DOWN, 1)
EVT_RIBBONBAR_TAB_MIDDLE_UP = wx.PyEventBinder(wxEVT_COMMAND_RIBBONBAR_TAB_MIDDLE_UP, 1)
EVT_RIBBONBAR_TAB_RIGHT_DOWN = wx.PyEventBinder(wxEVT_COMMAND_RIBBONBAR_TAB_RIGHT_DOWN, 1)
EVT_RIBBONBAR_TAB_RIGHT_UP = wx.PyEventBinder(wxEVT_COMMAND_RIBBONBAR_TAB_RIGHT_UP, 1)
EVT_RIBBONBAR_TAB_LEFT_DCLICK = wx.PyEventBinder(wxEVT_COMMAND_RIBBONBAR_TAB_LEFT_DCLICK, 1)


def SET_FLAG(variable, flag):

    refresh_tabs = False
    if variable & flag != flag:
        variable |= flag
        refresh_tabs = True

    return variable, refresh_tabs


def UNSET_FLAG(variable, flag):

    refresh_tabs = False
    if variable & flag:
        variable &= ~flag
        refresh_tabs = True 

    return variable, refresh_tabs


class RibbonBarEvent(wx.NotifyEvent):
    """
    Event used to indicate various actions relating to a L{RibbonBar}.

    See L{RibbonBar} for available event types.
    """
    
    def __init__(self, command_type=None, win_id=0, page=None):
    
        wx.NotifyEvent.__init__(self, command_type, win_id)
        self._page = page

        self._isAllowed = True        


    def GetPage(self):
        """
        Returns the page being changed to, or being clicked on.
        """

        return self._page

    
    def SetPage(self, page):
        """
        Sets the page relating to this event.

        :param `page`: MISSING DESCRIPTION.

        """

        self._page = page


    def Allow(self):

        self._isAllowed = True


    def Veto(self):

        self._isAllowed = False


    def IsAllowed(self):

        return self._isAllowed        


class RibbonBar(RibbonControl):
    
    def __init__(self, parent, id=wx.ID_ANY, pos=wx.DefaultPosition, size=wx.DefaultSize, agwStyle=RIBBON_BAR_DEFAULT_STYLE,
                 validator=wx.DefaultValidator, name="RibbonBar"):
        """
        Default constructor.

        :param `parent`: Pointer to a parent window;
        :param `id`: Window identifier. If ``wx.ID_ANY``, will automatically create
         an identifier;
        :param `pos`: Window position. ``wx.DefaultPosition`` indicates that wxPython
         should generate a default position for the window;
        :param `size`: Window size. ``wx.DefaultSize`` indicates that wxPython should
         generate a default size for the window. If no suitable size can be found,
         the window will be sized to 20x20 pixels so that the window is visible but
         obviously not correctly sized;
        :param `agwStyle`: the AGW-specific window style. This can be a combination of the
         following bits:

         ========================================== =========== ==========================================
         Window Styles                              Hex Value   Description
         ========================================== =========== ==========================================
         ``RIBBON_BAR_DEFAULT_STYLE``                       0x9 Defined as ``RIBBON_BAR_FLOW_HORIZONTAL`` | ``RIBBON_BAR_SHOW_PAGE_LABELS`` | ``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS``
         ``RIBBON_BAR_FOLDBAR_STYLE``                      0x1e Defined as ``RIBBON_BAR_FLOW_VERTICAL`` | ``RIBBON_BAR_SHOW_PAGE_ICONS`` | ``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS`` | ``RIBBON_BAR_SHOW_PANEL_MINIMISE_BUTTONS``
         ``RIBBON_BAR_SHOW_PAGE_LABELS``                    0x1 Causes labels to be shown on the tabs in the ribbon bar.
         ``RIBBON_BAR_SHOW_PAGE_ICONS``                     0x2 Causes icons to be shown on the tabs in the ribbon bar.
         ``RIBBON_BAR_FLOW_HORIZONTAL``                     0x0 Causes panels within pages to stack horizontally.
         ``RIBBON_BAR_FLOW_VERTICAL``                       0x4 Causes panels within pages to stack vertically.
         ``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS``              0x8 Causes extension buttons to be shown on panels (where the panel has such a button).
         ``RIBBON_BAR_SHOW_PANEL_MINIMISE_BUTTONS``        0x10 Causes minimise buttons to be shown on panels (where the panel has such a button).
         ========================================== =========== ==========================================

        :param `validator`: the window validator;
        :param `name`: the window name.

        """

        RibbonControl.__init__(self, parent, id, pos, size, style=wx.NO_BORDER)
        
        self._flags = 0
        self._tabs_total_width_ideal = 0
        self._tabs_total_width_minimum = 0
        self._tab_margin_left = 0
        self._tab_margin_right = 0
        self._tab_height = 0
        self._tab_scroll_amount = 0
        self._current_page = -1
        self._current_hovered_page = -1
        self._tab_scroll_left_button_state = RIBBON_SCROLL_BTN_NORMAL
        self._tab_scroll_right_button_state = RIBBON_SCROLL_BTN_NORMAL
        self._tab_scroll_buttons_shown = False
        self._arePanelsShown = True
        self._pages = []

        self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
        self.Bind(wx.EVT_LEAVE_WINDOW, self.OnMouseLeave)
        self.Bind(wx.EVT_LEFT_DOWN, self.OnMouseLeftDown)
        self.Bind(wx.EVT_LEFT_DCLICK, self.OnMouseDoubleClick)        
        self.Bind(wx.EVT_LEFT_UP, self.OnMouseLeftUp)
        self.Bind(wx.EVT_MIDDLE_DOWN, self.OnMouseMiddleDown)
        self.Bind(wx.EVT_MIDDLE_UP, self.OnMouseMiddleUp)
        self.Bind(wx.EVT_MOTION, self.OnMouseMove)
        self.Bind(wx.EVT_PAINT, self.OnPaint)
        self.Bind(wx.EVT_RIGHT_DOWN, self.OnMouseRightDown)
        self.Bind(wx.EVT_RIGHT_UP, self.OnMouseRightUp)
        self.Bind(wx.EVT_SIZE, self.OnSize)

        self.CommonInit(agwStyle)
        

    def AddPage(self, page):

        info = RibbonPageTabInfo()

        info.page = page
        info.active = False
        info.hovered = False
        # info.rect not set (intentional)

        dcTemp = wx.ClientDC(self)
        label = ""
        if self._flags & RIBBON_BAR_SHOW_PAGE_LABELS:
            label = page.GetLabel()
            
        icon = wx.NullBitmap
        if self._flags & RIBBON_BAR_SHOW_PAGE_ICONS:
            icon = page.GetIcon()

        info.ideal_width, info.small_begin_need_separator_width, \
        info.small_must_have_separator_width, info.minimum_width = self._art.GetBarTabWidth(dcTemp, self, label, icon, info.ideal_width,
                                                                                            info.small_begin_need_separator_width,
                                                                                            info.small_must_have_separator_width, info.minimum_width)

        if not self._pages:
            self._tabs_total_width_ideal = info.ideal_width
            self._tabs_total_width_minimum = info.minimum_width
        else:
            sep = self._art.GetMetric(RIBBON_ART_TAB_SEPARATION_SIZE)
            self._tabs_total_width_ideal += sep + info.ideal_width
            self._tabs_total_width_minimum += sep + info.minimum_width

        self._pages.append(info)

        page.Hide() # Most likely case is that self new page is not the active tab
        page.SetArtProvider(self._art)

        if len(self._pages) == 1:
            self.SetActivePage(0)
    

    def DismissExpandedPanel(self):
        """
        Dismiss the expanded panel of the currently active page.

        Calls and returns the value from L{RibbonPage.DismissExpandedPanel} for the
        currently active page, or ``False`` if there is no active page.
        """

        if self._current_page == -1:
            return False
        
        return self._pages[self._current_page].page.DismissExpandedPanel()


    def ShowPanels(self, show=True):
        """
        Shows or hides the panels inside L{RibbonBar}.

        :param `show`: ``True`` to show the panels, ``False`` to hide them.
        """

        self._arePanelsShown = show
        self.SetMinSize(wx.Size(self.GetSize().GetWidth(), self.DoGetBestSize().GetHeight()))
        self.Realise()
        self.GetParent().Layout()


    def SetAGWWindowStyleFlag(self, agwStyle):
        """
        Sets the window style for L{RibbonBar}.

        :param `agwStyle`: can be a combination of the following bits:

         ========================================== =========== ==========================================
         Window Styles                              Hex Value   Description
         ========================================== =========== ==========================================
         ``RIBBON_BAR_DEFAULT_STYLE``                       0x9 Defined as ``RIBBON_BAR_FLOW_HORIZONTAL`` | ``RIBBON_BAR_SHOW_PAGE_LABELS`` | ``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS``
         ``RIBBON_BAR_FOLDBAR_STYLE``                      0x1e Defined as ``RIBBON_BAR_FLOW_VERTICAL`` | ``RIBBON_BAR_SHOW_PAGE_ICONS`` | ``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS`` | ``RIBBON_BAR_SHOW_PANEL_MINIMISE_BUTTONS``
         ``RIBBON_BAR_SHOW_PAGE_LABELS``                    0x1 Causes labels to be shown on the tabs in the ribbon bar.
         ``RIBBON_BAR_SHOW_PAGE_ICONS``                     0x2 Causes icons to be shown on the tabs in the ribbon bar.
         ``RIBBON_BAR_FLOW_HORIZONTAL``                     0x0 Causes panels within pages to stack horizontally.
         ``RIBBON_BAR_FLOW_VERTICAL``                       0x4 Causes panels within pages to stack vertically.
         ``RIBBON_BAR_SHOW_PANEL_EXT_BUTTONS``              0x8 Causes extension buttons to be shown on panels (where the panel has such a button).
         ``RIBBON_BAR_SHOW_PANEL_MINIMISE_BUTTONS``        0x10 Causes minimise buttons to be shown on panels (where the panel has such a button).
         ========================================== =========== ==========================================
         
        :note: Please note that some styles cannot be changed after the window creation
         and that `Refresh()` might need to be be called after changing the others for
         the change to take place immediately.
        """

        self._flags = agwStyle
        
        if self._art:
            self._art.SetFlags(agwStyle)


    def GetAGWWindowStyleFlag(self):
        """
        Returns the L{RibbonBar} window style flag.

        :see: L{SetAGWWindowStyleFlag} for a list of valid window styles.
        """

        return self._flags


    def Realize(self):
        """
        Perform initial layout and size calculations of the bar and its children.

        This must be called after all of the bar's children have been created (and their
        children created, etc.) - if it is not, then windows may not be laid out or
        sized correctly. Also calls L{RibbonPage.Realize} on each child page.
        
        Reimplemented from L{RibbonControl}.

        """

        status = True

        dcTemp = wx.ClientDC(self)
        sep = self._art.GetMetric(RIBBON_ART_TAB_SEPARATION_SIZE)
        numtabs = len(self._pages)

        for i, info in enumerate(self._pages):
        
            self.RepositionPage(info.page)
            if not info.page.Realize():
                status = False
            
            label = ""
            if self._flags & RIBBON_BAR_SHOW_PAGE_LABELS:
                label = info.page.GetLabel()
                
            icon = wx.NullBitmap
            if self._flags & RIBBON_BAR_SHOW_PAGE_ICONS:
                icon = info.page.GetIcon()

            info.ideal_width, info.small_begin_need_separator_width, \
                              info.small_must_have_separator_width, \
                              info.minimum_width = self._art.GetBarTabWidth(dcTemp, self, label, icon, info.ideal_width,
                                                                            info.small_begin_need_separator_width, info.small_must_have_separator_width,
                                                                            info.minimum_width)

            if i == 0:
                self._tabs_total_width_ideal = info.ideal_width
                self._tabs_total_width_minimum = info.minimum_width
            else:
                self._tabs_total_width_ideal += sep + info.ideal_width
                self._tabs_total_width_minimum += sep + info.minimum_width
            
        self._tab_height = self._art.GetTabCtrlHeight(dcTemp, self, self._pages)

        self.RecalculateMinSize()
        self.RecalculateTabSizes()
        self.Refresh()

        return status


    def OnMouseMove(self, event):

        x, y = event.GetX(), event.GetY()
        hovered_page = -1
        refresh_tabs = False
        
        if y < self._tab_height:
            # It is quite likely that the mouse moved a small amount and is still over the same tab
            if self._current_hovered_page != -1 and self._pages[self._current_hovered_page].rect.Contains((x, y)):
                hovered_page = self._current_hovered_page
                # But be careful, if tabs can be scrolled, then parts of the tab rect may not be valid
                if self._tab_scroll_buttons_shown:
                    if x >= self._tab_scroll_right_button_rect.GetX() or x < self._tab_scroll_left_button_rect.GetRight():
                        hovered_page = -1
                    
            else:
            
                hovered_page, dummy = self.HitTestTabs(event.GetPosition())

        if hovered_page != self._current_hovered_page:
            if self._current_hovered_page != -1:
                self._pages[self._current_hovered_page].hovered = False
            
            self._current_hovered_page = hovered_page
            if self._current_hovered_page != -1:
                self._pages[self._current_hovered_page].hovered = True
            
            refresh_tabs = True
        
        if self._tab_scroll_buttons_shown:
            if self._tab_scroll_left_button_rect.Contains((x, y)):
                self._tab_scroll_left_button_state, refresh_tabs = SET_FLAG(self._tab_scroll_left_button_state, RIBBON_SCROLL_BTN_HOVERED)
            else:
                self._tab_scroll_left_button_state, refresh_tabs = UNSET_FLAG(self._tab_scroll_left_button_state, RIBBON_SCROLL_BTN_HOVERED)

            if self._tab_scroll_right_button_rect.Contains((x, y)):
                self._tab_scroll_right_button_state, refresh_tabs = SET_FLAG(self._tab_scroll_right_button_state, RIBBON_SCROLL_BTN_HOVERED)
            else:
                self._tab_scroll_right_button_state, refresh_tabs = UNSET_FLAG(self._tab_scroll_right_button_state, RIBBON_SCROLL_BTN_HOVERED)
        
        if refresh_tabs:
            self.RefreshTabBar()
        

    def OnMouseLeave(self, event):

        # The ribbon bar is (usually) at the top of a window, and at least on MSW, the mouse
        # can leave the window quickly and leave a tab in the hovered state.
        refresh_tabs = False

        if self._current_hovered_page != -1:
            self._pages[self._current_hovered_page].hovered = False
            self._current_hovered_page = -1
            refresh_tabs = True
        
        if self._tab_scroll_left_button_state & RIBBON_SCROLL_BTN_HOVERED:
            self._tab_scroll_left_button_state &= ~RIBBON_SCROLL_BTN_HOVERED
            refresh_tabs = True
        
        if self._tab_scroll_right_button_state & RIBBON_SCROLL_BTN_HOVERED:
            self._tab_scroll_right_button_state &= ~RIBBON_SCROLL_BTN_HOVERED
            refresh_tabs = True
        
        if refresh_tabs:
            self.RefreshTabBar()
    

    def GetPage(self, n):
        """
        Get a page by index.

        ``None`` will be returned if the given index is out of range.

        :param `n`: MISSING DESCRIPTION.

        """

        if n < 0 or n >= len(self._pages):
            return 0
        
        return self._pages[n].page


    def SetActivePageByIndex(self, page):
        """
        Set the active page by index, without triggering any events.
        
        :param `page`: The zero-based index of the page to activate.

        :returns: ``True`` if the specified page is now active, ``False`` if it could
         not be activated (for example because the page index is invalid).
        """

        if self._current_page == page:
            return True

        if page >= len(self._pages):
            return False
        
        if self._current_page != -1:
            self._pages[self._current_page].active = False
            self._pages[self._current_page].page.Hide()
        
        self._current_page = page
        self._pages[page].active = True
        
        wnd = self._pages[page].page
        self.RepositionPage(wnd)
        wnd.Layout()
        wnd.Show()
        
        self.Refresh()

        return True


    def SetActivePageByPage(self, page):
        """
        Set the active page, without triggering any events.

        :param `page`: The page to activate.

        :returns: ``True`` if the specified page is now active, ``False`` if it could
         not be activated (for example because the given page is not a child of the
         ribbon bar).
         
        """

        for i in xrange(len(self._pages)):
            if self._pages[i].page == page:
                return self.SetActivePageByIndex(i)
            
        return False


    def SetActivePage(self, page):
        """ See comments on L{SetActivePageByIndex} and L{SetActivePageByPage}. """

        if isinstance(page, types.IntType):
            return self.SetActivePageByIndex(page)

        return self.SetActivePageByPage(page)
    

    def GetActivePage(self):
        """
        Get the index of the active page.

        In the rare case of no page being active, -1 is returned.
        """

        return self._current_page


    def SetTabCtrlMargins(self, left, right):
        """
        Set the margin widths (in pixels) on the left and right sides of the tab bar
        region of the ribbon bar.

        These margins will be painted with the tab background, but tabs and scroll
        buttons will never be painted in the margins. The left margin could be used for
        rendering something equivalent to the "Office Button", though this is not
        currently implemented. The right margin could be used for rendering a help
        button, and/or MDI buttons, but again, this is not currently implemented.

        :param `left`: MISSING DESCRIPTION;
        :param `right`: MISSING DESCRIPTION.

        """

        self._tab_margin_left = left
        self._tab_margin_right = right

        self.RecalculateTabSizes()


    def OrderPageTabInfoBySmallWidthAsc(self, first, second):

        return first.small_must_have_separator_width - second.small_must_have_separator_width


    def RecalculateTabSizes(self):

        numtabs = len(self._pages)

        if numtabs == 0:
            return

        width = self.GetSize().GetWidth() - self._tab_margin_left - self._tab_margin_right
        tabsep = self._art.GetMetric(RIBBON_ART_TAB_SEPARATION_SIZE)
        x = self._tab_margin_left
        y = 0

        if width >= self._tabs_total_width_ideal:
            # Simple case: everything at ideal width
            for info in self._pages:
                info.rect.x = x
                info.rect.y = y
                info.rect.width = info.ideal_width
                info.rect.height = self._tab_height
                x += info.rect.width + tabsep
            
            self._tab_scroll_buttons_shown = False
            self._tab_scroll_left_button_rect.SetWidth(0)
            self._tab_scroll_right_button_rect.SetWidth(0)
        
        elif width < self._tabs_total_width_minimum:
            # Simple case: everything minimum with scrollbar
            for info in self._pages:            
                info.rect.x = x
                info.rect.y = y
                info.rect.width = info.minimum_width
                info.rect.height = self._tab_height
                x += info.rect.width + tabsep
            
            if not self._tab_scroll_buttons_shown:            
                self._tab_scroll_left_button_state = RIBBON_SCROLL_BTN_NORMAL
                self._tab_scroll_right_button_state = RIBBON_SCROLL_BTN_NORMAL
                self._tab_scroll_buttons_shown = True
            
            temp_dc = wx.ClientDC(self)
            self._tab_scroll_left_button_rect.SetWidth(self._art.GetScrollButtonMinimumSize(temp_dc, self,
                                                                                            RIBBON_SCROLL_BTN_LEFT | RIBBON_SCROLL_BTN_NORMAL |
                                                                                            RIBBON_SCROLL_BTN_FOR_TABS).GetWidth())
            self._tab_scroll_left_button_rect.SetHeight(self._tab_height)
            self._tab_scroll_left_button_rect.SetX(self._tab_margin_left)
            self._tab_scroll_left_button_rect.SetY(0)
            self._tab_scroll_right_button_rect.SetWidth(self._art.GetScrollButtonMinimumSize(temp_dc, self,
                                                                                             RIBBON_SCROLL_BTN_RIGHT | RIBBON_SCROLL_BTN_NORMAL |
                                                                                             RIBBON_SCROLL_BTN_FOR_TABS).GetWidth())
            self._tab_scroll_right_button_rect.SetHeight(self._tab_height)
            self._tab_scroll_right_button_rect.SetX(self.GetClientSize().GetWidth() - self._tab_margin_right - self._tab_scroll_right_button_rect.GetWidth())
            self._tab_scroll_right_button_rect.SetY(0)
            
            if self._tab_scroll_amount == 0:
                self._tab_scroll_left_button_rect.SetWidth(0)
            
            elif self._tab_scroll_amount + width >= self._tabs_total_width_minimum:
                self._tab_scroll_amount = self._tabs_total_width_minimum - width
                self._tab_scroll_right_button_rect.SetX(self._tab_scroll_right_button_rect.GetX() + self._tab_scroll_right_button_rect.GetWidth())
                self._tab_scroll_right_button_rect.SetWidth(0)
            
            for info in self._pages:
                info.rect.x -= self._tab_scroll_amount
                    
        else:
            self._tab_scroll_buttons_shown = False
            self._tab_scroll_left_button_rect.SetWidth(0)
            self._tab_scroll_right_button_rect.SetWidth(0)
            # Complex case: everything sized such that: minimum <= width < ideal
            #
            #   Strategy:
            #     1) Uniformly reduce all tab widths from ideal to small_must_have_separator_width
            #     2) Reduce the largest tab by 1 pixel, repeating until all tabs are same width (or at minimum)
            #     3) Uniformly reduce all tabs down to their minimum width
            #
            smallest_tab_width = 10000
            total_small_width = tabsep * (numtabs - 1)

            for info in self._pages:
                if info.small_must_have_separator_width < smallest_tab_width:                
                    smallest_tab_width = info.small_must_have_separator_width
                
                total_small_width += info.small_must_have_separator_width
            
            if width >= total_small_width:
                # Do (1)
                total_delta = self._tabs_total_width_ideal - total_small_width
                total_small_width -= tabsep*(numtabs - 1)
                width -= tabsep*(numtabs - 1)
                for info in self._pages:
                    delta = info.ideal_width - info.small_must_have_separator_width
                    info.rect.x = x
                    info.rect.y = y
                    info.rect.width = info.small_must_have_separator_width + delta*(width - total_small_width)/total_delta
                    info.rect.height = self._tab_height

                    x += info.rect.width + tabsep
                    total_delta -= delta
                    total_small_width -= info.small_must_have_separator_width
                    width -= info.rect.width
                
            else:
            
                total_small_width = tabsep*(numtabs - 1)
                for info in self._pages:
                    if info.minimum_width < smallest_tab_width:
                        total_small_width += smallest_tab_width
                    else:                    
                        total_small_width += info.minimum_width
                    
                if width >= total_small_width:
                    # Do (2)
                    sorted_pages = []
                    for info in self._pages:
                        # Sneaky obj array trickery to not copy the tab descriptors
                        sorted_pages.append(info)
                    
                    sorted_pages.sort(self.OrderPageTabInfoBySmallWidthAsc)
                    width -= tabsep*(numtabs - 1)

                    for i, info in enumerate(self._pages):
                        if info.small_must_have_separator_width*(numtabs - i) <= width:
                            info.rect.width = info.small_must_have_separator_width
                        else:                        
                            info.rect.width = width/(numtabs - i)
                        
                        width -= info.rect.width
                    
                    for i, info in enumerate(self._pages):
                        info.rect.x = x
                        info.rect.y = y
                        info.rect.height = self._tab_height
                        x += info.rect.width + tabsep
                        sorted_pages.pop(numtabs - (i + 1))
                    
                else:
                
                    # Do (3)
                    total_small_width = (smallest_tab_width + tabsep)*numtabs - tabsep
                    total_delta = total_small_width - self._tabs_total_width_minimum
                    total_small_width = self._tabs_total_width_minimum - tabsep*(numtabs - 1)
                    width -= tabsep*(numtabs - 1)
                    
                    for info in self._pages:
                        delta = smallest_tab_width - info.minimum_width
                        info.rect.x = x
                        info.rect.y = y
                        info.rect.width = info.minimum_width + delta*(width - total_small_width)/total_delta
                        info.rect.height = self._tab_height

                        x += info.rect.width + tabsep
                        total_delta -= delta
                        total_small_width -= info.minimum_width
                        width -= info.rect.width


    def CommonInit(self, agwStyle):

        self.SetName("RibbonBar")

        self._flags = agwStyle
        self._tabs_total_width_ideal = 0
        self._tabs_total_width_minimum = 0
        self._tab_margin_left = 50
        self._tab_margin_right = 20
        self._tab_height = 20 # initial guess
        self._tab_scroll_amount = 0
        self._current_page = -1
        self._current_hovered_page = -1
        self._tab_scroll_left_button_state = RIBBON_SCROLL_BTN_NORMAL
        self._tab_scroll_right_button_state = RIBBON_SCROLL_BTN_NORMAL
        self._tab_scroll_buttons_shown = False
        self._arePanelsShown = True
        self._tab_scroll_left_button_rect = wx.Rect()
        self._tab_scroll_right_button_rect = wx.Rect()

        if not self._art:
            self.SetArtProvider(RibbonMSWArtProvider())
        
        self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)


    def SetArtProvider(self, art):
        """
        Set the art provider to be used be the ribbon bar.

        Also sets the art provider on all current L{RibbonPage} children, and any
        L{RibbonPage} children added in the future.

        Note that unlike most other ribbon controls, the ribbon bar creates a default
        art provider when initialised, so an explicit call to L{SetArtProvider} is
        not required if the default art provider is sufficient. Also unlike other
        ribbon controls, the ribbon bar takes ownership of the given pointer, and
        will delete it when the art provider is changed or the bar is destroyed.

        If this behaviour is not desired, then clone the art provider before setting
        it.

        Reimplemented from L{RibbonControl}.

        :param `art`: MISSING DESCRIPTION.

        """

        self._art = art

        if art:
            art.SetFlags(self._flags)
        
        for info in self._pages:
            if info.page.GetArtProvider() != art:
                info.page.SetArtProvider(art)
            

    def OnPaint(self, event):

        dc = wx.AutoBufferedPaintDC(self)

        if not self.GetUpdateRegion().ContainsRect(wx.Rect(0, 0, self.GetClientSize().GetWidth(), self._tab_height)):
            # Nothing to do in the tab area, and the page area is handled by the active page
            return
        
        self.DoEraseBackground(dc)

        numtabs = len(self._pages)
        sep_visibility = 0.0
        draw_sep = False
        tabs_rect = wx.Rect(self._tab_margin_left, 0, self.GetClientSize().GetWidth() - self._tab_margin_left - self._tab_margin_right, self._tab_height)
        
        if self._tab_scroll_buttons_shown:
            tabs_rect.x += self._tab_scroll_left_button_rect.GetWidth()
            tabs_rect.width -= self._tab_scroll_left_button_rect.GetWidth() + self._tab_scroll_right_button_rect.GetWidth()
        
        for info in self._pages:
            dc.DestroyClippingRegion()
            if self._tab_scroll_buttons_shown:
                if not tabs_rect.Intersects(info.rect):
                    continue
                dc.SetClippingRect(tabs_rect)
            
            dc.SetClippingRect(info.rect)
            self._art.DrawTab(dc, self, info)

            if info.rect.width < info.small_begin_need_separator_width:
                draw_sep = True
                if info.rect.width < info.small_must_have_separator_width:
                    sep_visibility += 1.0
                else:                
                    sep_visibility += float(info.small_begin_need_separator_width - info.rect.width)/ \
                                      float(info.small_begin_need_separator_width - info.small_must_have_separator_width)
        
        if draw_sep:
        
            rect = wx.Rect(*self._pages[0].rect)
            rect.width = self._art.GetMetric(RIBBON_ART_TAB_SEPARATION_SIZE)
            sep_visibility /= float(numtabs)
            
            for i in xrange(0, numtabs-1):
                info = self._pages[i]
                rect.x = info.rect.x + info.rect.width

                if self._tab_scroll_buttons_shown and not tabs_rect.Intersects(rect):                
                    continue
                
                dc.DestroyClippingRegion()
                dc.SetClippingRect(rect)
                self._art.DrawTabSeparator(dc, self, rect, sep_visibility)

        if self._tab_scroll_buttons_shown:        
            dc.DestroyClippingRegion()
            if self._tab_scroll_left_button_rect.GetWidth() != 0:            
                self._art.DrawScrollButton(dc, self, self._tab_scroll_left_button_rect, RIBBON_SCROLL_BTN_LEFT |
                                           self._tab_scroll_left_button_state | RIBBON_SCROLL_BTN_FOR_TABS)
            
            if self._tab_scroll_right_button_rect.GetWidth() != 0:            
                self._art.DrawScrollButton(dc, self, self._tab_scroll_right_button_rect, RIBBON_SCROLL_BTN_RIGHT |
                                           self._tab_scroll_right_button_state | RIBBON_SCROLL_BTN_FOR_TABS)
            

    def OnEraseBackground(self, event):

        # Background painting done in main paint handler to reduce screen flicker
        pass


    def DoEraseBackground(self, dc):

        tabs = wx.Rect(0, 0, *self.GetSize())
        tabs.height = self._tab_height
        self._art.DrawTabCtrlBackground(dc, self, tabs)


    def OnSize(self, event):

        self.RecalculateTabSizes()
        if self._current_page != -1:
            self.RepositionPage(self._pages[self._current_page].page)

        self.RefreshTabBar()
        event.Skip()


    def RepositionPage(self, page):

        w, h = self.GetSize()
        page.SetSizeWithScrollButtonAdjustment(0, self._tab_height, w, h - self._tab_height)


    def HitTestTabs(self, position):

        tabs_rect = wx.Rect(self._tab_margin_left, 0, self.GetClientSize().GetWidth() - self._tab_margin_left - self._tab_margin_right, self._tab_height)
        
        if self._tab_scroll_buttons_shown:        
            tabs_rect.SetX(tabs_rect.GetX() + self._tab_scroll_left_button_rect.GetWidth())
            tabs_rect.SetWidth(tabs_rect.GetWidth() - self._tab_scroll_left_button_rect.GetWidth() - self._tab_scroll_right_button_rect.GetWidth())
        
        if tabs_rect.Contains(position):
            for i, info in enumerate(self._pages):
                if info.rect.Contains(position):
                    return i, info

        return -1, None


    def OnMouseLeftDown(self, event):

        index, tab = self.HitTestTabs(event.GetPosition())
        if tab and tab != self._pages[self._current_page]:
            query = RibbonBarEvent(wxEVT_COMMAND_RIBBONBAR_PAGE_CHANGING, self.GetId(), tab.page)
            query.SetEventObject(self)
            self.GetEventHandler().ProcessEvent(query)

            if query.IsAllowed(): 
                self.SetActivePage(query.GetPage())
                notification = RibbonBarEvent(wxEVT_COMMAND_RIBBONBAR_PAGE_CHANGED, self.GetId(), self._pages[self._current_page].page)
                notification.SetEventObject(self)
                self.GetEventHandler().ProcessEvent(notification)
            
        elif tab == None:
            if self._tab_scroll_left_button_rect.Contains(event.GetPosition()):
                self._tab_scroll_left_button_state |= RIBBON_SCROLL_BTN_ACTIVE | RIBBON_SCROLL_BTN_HOVERED
                self.RefreshTabBar()
            
            elif self._tab_scroll_right_button_rect.Contains(event.GetPosition()):
                self._tab_scroll_right_button_state |= RIBBON_SCROLL_BTN_ACTIVE | RIBBON_SCROLL_BTN_HOVERED
                self.RefreshTabBar()


    def OnMouseDoubleClick(self, event):

        self.DoMouseButtonCommon(event, wxEVT_COMMAND_RIBBONBAR_TAB_LEFT_DCLICK)

        
    def OnMouseLeftUp(self, event):

        if not self._tab_scroll_buttons_shown:
            return
        
        amount = 0
        
        if self._tab_scroll_left_button_state & RIBBON_SCROLL_BTN_ACTIVE:        
            amount = -1
        
        elif self._tab_scroll_right_button_state & RIBBON_SCROLL_BTN_ACTIVE:        
            amount = 1
        
        if amount != 0:
            self._tab_scroll_left_button_state &= ~RIBBON_SCROLL_BTN_ACTIVE
            self._tab_scroll_right_button_state &= ~RIBBON_SCROLL_BTN_ACTIVE
            self.ScrollTabBar(amount*8)
        

    def ScrollTabBar(self, amount):

        show_left = True
        show_right = True
        
        if self._tab_scroll_amount + amount <= 0:
            amount = -self._tab_scroll_amount
            show_left = False
        
        elif self._tab_scroll_amount + amount + (self.GetClientSize().GetWidth() - \
                                                 self._tab_margin_left - self._tab_margin_right) >= \
                                                 self._tabs_total_width_minimum:
            amount = self._tabs_total_width_minimum - self._tab_scroll_amount - \
                     (self.GetClientSize().GetWidth() - self._tab_margin_left - self._tab_margin_right)
            show_right = False
        
        if amount == 0:
            return
        
        self._tab_scroll_amount += amount
        for info in self._pages:
            info.rect.SetX(info.rect.GetX() - amount)
        
        if show_right != (self._tab_scroll_right_button_rect.GetWidth() != 0) or \
           show_left != (self._tab_scroll_left_button_rect.GetWidth() != 0):
        
            temp_dc = wx.ClientDC(self)
            
            if show_left:            
                self._tab_scroll_left_button_rect.SetWidth(self._art.GetScrollButtonMinimumSize(temp_dc, self, RIBBON_SCROLL_BTN_LEFT |
                                                                                                RIBBON_SCROLL_BTN_NORMAL |
                                                                                                RIBBON_SCROLL_BTN_FOR_TABS).GetWidth())
            else:            
                self._tab_scroll_left_button_rect.SetWidth(0)
            
            if show_right:            
                if self._tab_scroll_right_button_rect.GetWidth() == 0:                
                    self._tab_scroll_right_button_rect.SetWidth(self._art.GetScrollButtonMinimumSize(temp_dc, self,
                                                                                                     RIBBON_SCROLL_BTN_RIGHT |
                                                                                                     RIBBON_SCROLL_BTN_NORMAL |
                                                                                                     RIBBON_SCROLL_BTN_FOR_TABS).GetWidth())
                    self._tab_scroll_right_button_rect.SetX(self._tab_scroll_right_button_rect.GetX() - self._tab_scroll_right_button_rect.GetWidth())
            else:
            
                if self._tab_scroll_right_button_rect.GetWidth() != 0:                
                    self._tab_scroll_right_button_rect.SetX(self._tab_scroll_right_button_rect.GetX() + self._tab_scroll_right_button_rect.GetWidth())
                    self._tab_scroll_right_button_rect.SetWidth(0)
                
        self.RefreshTabBar()


    def RefreshTabBar(self):

        tab_rect = wx.Rect(0, 0, self.GetClientSize().GetWidth(), self._tab_height)
        self.Refresh(False, tab_rect)


    def OnMouseMiddleDown(self, event):

        self.DoMouseButtonCommon(event, wxEVT_COMMAND_RIBBONBAR_TAB_MIDDLE_DOWN)


    def OnMouseMiddleUp(self, event):

        self.DoMouseButtonCommon(event, wxEVT_COMMAND_RIBBONBAR_TAB_MIDDLE_UP)


    def OnMouseRightDown(self, event):

        self.DoMouseButtonCommon(event, wxEVT_COMMAND_RIBBONBAR_TAB_RIGHT_DOWN)


    def OnMouseRightUp(self, event):

        self.DoMouseButtonCommon(event, wxEVT_COMMAND_RIBBONBAR_TAB_RIGHT_UP)


    def DoMouseButtonCommon(self, event, tab_event_type):

        index, tab = self.HitTestTabs(event.GetPosition())
        
        if tab:        
            notification = RibbonBarEvent(tab_event_type, self.GetId(), tab.page)
            notification.SetEventObject(self)
            self.GetEventHandler().ProcessEvent(notification)


    def RecalculateMinSize(self):

        min_size = wx.Size(-1, -1)
        numtabs = len(self._pages)
        
        if numtabs != 0:
            min_size = wx.Size(*self._pages[0].page.GetMinSize())

            for info in self._pages:
                page_min = info.page.GetMinSize()
                min_size.x = max(min_size.x, page_min.x)
                min_size.y = max(min_size.y, page_min.y)
            
        if min_size.y != -1:
            # TODO: Decide on best course of action when min height is unspecified
            # - should we specify it to the tab minimum, or leave it unspecified?
            min_size.IncBy(0, self._tab_height)

        self._minWidth = min_size.GetWidth()
        self._minHeight = (self._arePanelsShown and [min_size.GetHeight()] or [self._tab_height])[0]


    def DoGetBestSize(self):

        best = wx.Size(0, 0)
        
        if self._current_page != -1:
            best = wx.Size(*self._pages[self._current_page].page.GetBestSize())

        if best.GetHeight() == -1:
            best.SetHeight(self._tab_height)
        else:        
            best.IncBy(0, self._tab_height)

        if not self._arePanelsShown:
            best.SetHeight(self._tab_height)

        return best


    def HasMultiplePages(self):

        return True


    def GetDefaultBorder(self):

        return wx.BORDER_NONE