Source

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

Full commit
   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
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
"""
L{RibbonAUIArtProvider} is responsible for drawing all the components of the ribbon
interface using an AUI-compatible appearance.


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

This allows a ribbon bar to have a pluggable look-and-feel, while retaining the same
underlying behaviour. As a single art provider is used for all ribbon components, a
ribbon bar usually has a consistent (though unique) appearance.

By default, a L{RibbonBar} uses an instance of a class called `RibbonDefaultArtProvider`,
which resolves to `RibbonAUIArtProvider`, `RibbonMSWArtProvider`, or `RibbonOSXArtProvider`
- whichever is most appropriate to the current platform. These art providers are all
slightly configurable with regard to colours and fonts, but for larger modifications,
you can derive from one of these classes, or write a completely new art provider class.

Call L{RibbonBar.SetArtProvider} to change the art provider being used.


See Also
========

L{RibbonBar}
"""

import wx

from math import cos
from math import pi as M_PI

from art_msw import RibbonMSWArtProvider
from art_internal import RibbonHSLColour, RibbonShiftLuminance, RibbonInterpolateColour

import bar as BAR, panel as PANEL

from art import *

if wx.Platform == "__WXMAC__":
    import Carbon.Appearance


def FontFromFont(original):

    newFont = wx.Font(original.GetPointSize(), original.GetFamily(),
                      original.GetStyle(), original.GetWeight(), original.GetUnderlined(),
                      original.GetFaceName(), original.GetEncoding())

    return newFont

    
class RibbonAUIArtProvider(RibbonMSWArtProvider):

    def __init__(self):

        RibbonMSWArtProvider.__init__(self)
        
        if wx.Platform == "__WXMAC__":

            if hasattr(wx, 'MacThemeColour'):
                base_colour = wx.MacThemeColour(Carbon.Appearance.kThemeBrushToolbarBackground)
            else:
                brush = wx.Brush(wx.BLACK)
                brush.MacSetTheme(Carbon.Appearance.kThemeBrushToolbarBackground)
                base_colour = brush.GetColour()
        else:
            
            base_colour = wx.SystemSettings.GetColour(wx.SYS_COLOUR_3DFACE)

        self.SetColourScheme(base_colour, wx.SystemSettings.GetColour(wx.SYS_COLOUR_HIGHLIGHT),
                             wx.SystemSettings.GetColour(wx.SYS_COLOUR_HIGHLIGHTTEXT))

        self._tab_active_label_font = FontFromFont(self._tab_label_font)
        self._tab_active_label_font.SetWeight(wx.FONTWEIGHT_BOLD)

        self._page_border_left = 1
        self._page_border_right = 1
        self._page_border_top = 1
        self._page_border_bottom = 2
        self._tab_separation_size = 0

        self._gallery_bitmap_padding_left_size = 3
        self._gallery_bitmap_padding_right_size = 3
        self._gallery_bitmap_padding_top_size = 3
        self._gallery_bitmap_padding_bottom_size = 3


    def Clone(self):
        """
        Create a new art provider which is a clone of this one.
        """

        copy = RibbonAUIArtProvider()
        self.CloneTo(copy)

        copy._tab_ctrl_background_colour = self._tab_ctrl_background_colour
        copy._tab_ctrl_background_gradient_colour = self._tab_ctrl_background_gradient_colour
        copy._panel_label_background_colour = self._panel_label_background_colour
        copy._panel_label_background_gradient_colour = self._panel_label_background_gradient_colour
        copy._panel_hover_label_background_colour = self._panel_hover_label_background_colour
        copy._panel_hover_label_background_gradient_colour = self._panel_hover_label_background_gradient_colour

        copy._background_brush = self._background_brush
        copy._tab_active_top_background_brush = self._tab_active_top_background_brush
        copy._tab_hover_background_brush = self._tab_hover_background_brush
        copy._button_bar_hover_background_brush = self._button_bar_hover_background_brush
        copy._button_bar_active_background_brush = self._button_bar_active_background_brush
        copy._gallery_button_active_background_brush = self._gallery_button_active_background_brush
        copy._gallery_button_hover_background_brush = self._gallery_button_hover_background_brush
        copy._gallery_button_disabled_background_brush = self._gallery_button_disabled_background_brush

        copy._toolbar_hover_borden_pen = self._toolbar_hover_borden_pen
        copy._tool_hover_background_brush = self._tool_hover_background_brush
        copy._tool_active_background_brush = self._tool_active_background_brush

        return copy


    def SetFont(self, id, font):
        """
        Set the value of a certain font setting to the value.

        can be one of the font values of `RibbonArtSetting`.

        :param `id`: the font id;
        :param `font`: MISSING DESCRIPTION.

        """

        RibbonMSWArtProvider.SetFont(self, id, font)
        
        if id == RIBBON_ART_TAB_LABEL_FONT:        
            self._tab_active_label_font = FontFromFont(self._tab_label_font)
            self._tab_active_label_font.SetWeight(wx.FONTWEIGHT_BOLD)
    

    def GetColour(self, id):
        """
        Get the value of a certain colour setting.

        can be one of the colour values of `RibbonArtSetting`.

        :param `id`: the colour id.

        """

        if id in [RIBBON_ART_PAGE_BACKGROUND_COLOUR, RIBBON_ART_PAGE_BACKGROUND_GRADIENT_COLOUR]:
            return self._background_brush.GetColour()
        elif id == RIBBON_ART_TAB_CTRL_BACKGROUND_COLOUR:
            return self._tab_ctrl_background_colour
        elif id == RIBBON_ART_TAB_CTRL_BACKGROUND_GRADIENT_COLOUR:
            return self._tab_ctrl_background_gradient_colour
        elif id in [RIBBON_ART_TAB_ACTIVE_BACKGROUND_TOP_COLOUR, RIBBON_ART_TAB_ACTIVE_BACKGROUND_TOP_GRADIENT_COLOUR]:
            return self._tab_active_top_background_brush.GetColour()
        elif id in [RIBBON_ART_TAB_HOVER_BACKGROUND_COLOUR, RIBBON_ART_TAB_HOVER_BACKGROUND_GRADIENT_COLOUR]:
            return self._tab_hover_background_brush.GetColour()
        elif id == RIBBON_ART_PANEL_LABEL_BACKGROUND_COLOUR:
            return self._panel_label_background_colour
        elif id == RIBBON_ART_PANEL_LABEL_BACKGROUND_GRADIENT_COLOUR:
            return self._panel_label_background_gradient_colour
        elif id == RIBBON_ART_PANEL_HOVER_LABEL_BACKGROUND_COLOUR:
            return self._panel_hover_label_background_colour
        elif id == RIBBON_ART_PANEL_HOVER_LABEL_BACKGROUND_GRADIENT_COLOUR:
            return self._panel_hover_label_background_gradient_colour
        elif id in [RIBBON_ART_BUTTON_BAR_HOVER_BACKGROUND_COLOUR, RIBBON_ART_BUTTON_BAR_HOVER_BACKGROUND_GRADIENT_COLOUR]:
            return self._button_bar_hover_background_brush.GetColour()
        elif id in [RIBBON_ART_GALLERY_BUTTON_HOVER_BACKGROUND_COLOUR, RIBBON_ART_GALLERY_BUTTON_HOVER_BACKGROUND_GRADIENT_COLOUR]:
            return self._gallery_button_hover_background_brush.GetColour()
        elif id in [RIBBON_ART_GALLERY_BUTTON_ACTIVE_BACKGROUND_COLOUR, RIBBON_ART_GALLERY_BUTTON_ACTIVE_BACKGROUND_GRADIENT_COLOUR]:
            return self._gallery_button_active_background_brush.GetColour()
        elif id in [RIBBON_ART_GALLERY_BUTTON_DISABLED_BACKGROUND_COLOUR, RIBBON_ART_GALLERY_BUTTON_DISABLED_BACKGROUND_GRADIENT_COLOUR]:
            return self._gallery_button_disabled_background_brush.GetColour()
        else:
            return RibbonMSWArtProvider.GetColour(self, id)
    

    def SetColour(self, id, colour):
        """
        Set the value of a certain colour setting to the value.

        can be one of the colour values of `RibbonArtSetting`, though not all colour
        settings will have an affect on every art provider.

        :param `id`: the colour id;
        :param `colour`: MISSING DESCRIPTION.

        :see: L{SetColourScheme}
        """

        if id in [RIBBON_ART_PAGE_BACKGROUND_COLOUR, RIBBON_ART_PAGE_BACKGROUND_GRADIENT_COLOUR]:
            self._background_brush.SetColour(colour)
        elif id == RIBBON_ART_TAB_CTRL_BACKGROUND_COLOUR:
            self._tab_ctrl_background_colour = colour
        elif id == RIBBON_ART_TAB_CTRL_BACKGROUND_GRADIENT_COLOUR:
            self._tab_ctrl_background_gradient_colour = colour
        elif id in [RIBBON_ART_TAB_ACTIVE_BACKGROUND_TOP_COLOUR, RIBBON_ART_TAB_ACTIVE_BACKGROUND_TOP_GRADIENT_COLOUR]:
            self._tab_active_top_background_brush.SetColour(colour)
        elif id in [RIBBON_ART_TAB_HOVER_BACKGROUND_COLOUR, RIBBON_ART_TAB_HOVER_BACKGROUND_GRADIENT_COLOUR]:
            self._tab_hover_background_brush.SetColour(colour)
        elif id == RIBBON_ART_PANEL_LABEL_BACKGROUND_COLOUR:
            self._panel_label_background_colour = colour
        elif id == RIBBON_ART_PANEL_LABEL_BACKGROUND_GRADIENT_COLOUR:
            self._panel_label_background_gradient_colour = colour
        elif id in [RIBBON_ART_BUTTON_BAR_HOVER_BACKGROUND_COLOUR, RIBBON_ART_BUTTON_BAR_HOVER_BACKGROUND_GRADIENT_COLOUR]:
            self._button_bar_hover_background_brush.SetColour(colour)
        elif id in [RIBBON_ART_GALLERY_BUTTON_HOVER_BACKGROUND_COLOUR, RIBBON_ART_GALLERY_BUTTON_HOVER_BACKGROUND_GRADIENT_COLOUR]:
            self._gallery_button_hover_background_brush.SetColour(colour)
        elif id in [RIBBON_ART_GALLERY_BUTTON_ACTIVE_BACKGROUND_COLOUR, RIBBON_ART_GALLERY_BUTTON_ACTIVE_BACKGROUND_GRADIENT_COLOUR]:
            self._gallery_button_active_background_brush.SetColour(colour)
        elif id in [RIBBON_ART_GALLERY_BUTTON_DISABLED_BACKGROUND_COLOUR, RIBBON_ART_GALLERY_BUTTON_DISABLED_BACKGROUND_GRADIENT_COLOUR]:
            self._gallery_button_disabled_background_brush.SetColour(colour)
        else:
            RibbonMSWArtProvider.SetColour(self, id, colour)
    

    def SetColourScheme(self, primary, secondary, tertiary):
        """
        Set all applicable colour settings from a few base colours.

        Uses any or all of the three given colours to create a colour scheme, and then
        sets all colour settings which are relevant to the art provider using that
        scheme. Note that some art providers may not use the tertiary colour for
        anything, and some may not use the secondary colour either.

        :param `primary`: MISSING DESCRIPTION;
        :param `secondary`: MISSING DESCRIPTION;
        :param `tertiary`: MISSING DESCRIPTION.

        :see: L{SetColour}, L{RibbonMSWArtProvider.GetColourScheme}
        """

        primary_hsl = RibbonHSLColour(primary)
        secondary_hsl = RibbonHSLColour(secondary)
        tertiary_hsl = RibbonHSLColour(tertiary)

        # Map primary & secondary luminance from [0, 1] to [0.15, 0.85]
        primary_hsl.luminance = cos(primary_hsl.luminance * M_PI) * -0.35 + 0.5
        secondary_hsl.luminance = cos(secondary_hsl.luminance * M_PI) * -0.35 + 0.5

        # TODO: Remove next line once this provider stops piggybacking MSW
        RibbonMSWArtProvider.SetColourScheme(self, primary, secondary, tertiary)

        self._tab_ctrl_background_colour = RibbonShiftLuminance(primary_hsl, 0.9).ToRGB()
        self._tab_ctrl_background_gradient_colour = RibbonShiftLuminance(primary_hsl, 1.7).ToRGB()
        self._tab_border_pen = wx.Pen(RibbonShiftLuminance(primary_hsl, 0.75).ToRGB())
        self._tab_label_colour = RibbonShiftLuminance(primary_hsl, 0.1).ToRGB()
        self._tab_hover_background_top_colour =  primary_hsl.ToRGB()
        self._tab_hover_background_top_gradient_colour = RibbonShiftLuminance(primary_hsl, 1.6).ToRGB()
        self._tab_hover_background_brush = wx.Brush(self._tab_hover_background_top_colour)
        self._tab_active_background_colour = self._tab_ctrl_background_gradient_colour
        self._tab_active_background_gradient_colour = primary_hsl.ToRGB()
        self._tab_active_top_background_brush = wx.Brush(self._tab_active_background_colour)
        self._panel_label_colour = self._tab_label_colour
        self._panel_minimised_label_colour = self._panel_label_colour
        self._panel_hover_label_colour = tertiary_hsl.ToRGB()
        self._page_border_pen = self._tab_border_pen
        self._panel_border_pen = self._tab_border_pen
        self._background_brush = wx.Brush(primary_hsl.ToRGB())
        self._page_hover_background_colour = RibbonShiftLuminance(primary_hsl, 1.5).ToRGB()
        self._page_hover_background_gradient_colour = RibbonShiftLuminance(primary_hsl, 0.9).ToRGB()
        self._panel_label_background_colour = RibbonShiftLuminance(primary_hsl, 0.85).ToRGB()
        self._panel_label_background_gradient_colour = RibbonShiftLuminance(primary_hsl, 0.97).ToRGB()
        self._panel_hover_label_background_gradient_colour = secondary_hsl.ToRGB()
        self._panel_hover_label_background_colour = secondary_hsl.Lighter(0.2).ToRGB()
        self._button_bar_hover_border_pen = wx.Pen(secondary_hsl.ToRGB())
        self._button_bar_hover_background_brush = wx.Brush(RibbonShiftLuminance(secondary_hsl, 1.7).ToRGB())
        self._button_bar_active_background_brush = wx.Brush(RibbonShiftLuminance(secondary_hsl, 1.4).ToRGB())
        self._button_bar_label_colour = self._tab_label_colour
        self._gallery_border_pen = self._tab_border_pen
        self._gallery_item_border_pen = self._button_bar_hover_border_pen
        self._gallery_hover_background_brush = wx.Brush(RibbonShiftLuminance(primary_hsl, 1.2).ToRGB())
        self._gallery_button_background_colour = self._page_hover_background_colour
        self._gallery_button_background_gradient_colour = self._page_hover_background_gradient_colour
        self._gallery_button_hover_background_brush = self._button_bar_hover_background_brush
        self._gallery_button_active_background_brush = self._button_bar_active_background_brush
        self._gallery_button_disabled_background_brush = wx.Brush(primary_hsl.Desaturated(0.15).ToRGB())
        self.SetColour(RIBBON_ART_GALLERY_BUTTON_FACE_COLOUR, RibbonShiftLuminance(primary_hsl, 0.1).ToRGB())
        self.SetColour(RIBBON_ART_GALLERY_BUTTON_DISABLED_FACE_COLOUR, wx.Colour(128, 128, 128))
        self.SetColour(RIBBON_ART_GALLERY_BUTTON_ACTIVE_FACE_COLOUR, RibbonShiftLuminance(secondary_hsl, 0.1).ToRGB())
        self.SetColour(RIBBON_ART_GALLERY_BUTTON_HOVER_FACE_COLOUR, RibbonShiftLuminance(secondary_hsl, 0.1).ToRGB())
        self._toolbar_border_pen = self._tab_border_pen
        self.SetColour(RIBBON_ART_TOOLBAR_FACE_COLOUR, RibbonShiftLuminance(primary_hsl, 0.1).ToRGB())
        self._tool_background_colour = self._page_hover_background_colour
        self._tool_background_gradient_colour = self._page_hover_background_gradient_colour
        self._toolbar_hover_borden_pen = self._button_bar_hover_border_pen
        self._tool_hover_background_brush = self._button_bar_hover_background_brush
        self._tool_active_background_brush = self._button_bar_active_background_brush


    def DrawTabCtrlBackground(self, dc, wnd, rect):
        """
        Draw the background of the tab region of a ribbon bar.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto;
        :param `rect`: The rectangle within which to draw.

        """

        gradient_rect = wx.Rect(*rect)
        gradient_rect.height -= 1
        dc.GradientFillLinear(gradient_rect, self._tab_ctrl_background_colour, self._tab_ctrl_background_gradient_colour, wx.SOUTH)
        dc.SetPen(self._tab_border_pen)
        dc.DrawLine(rect.x, rect.GetBottom(), rect.GetRight()+1, rect.GetBottom())


    def GetTabCtrlHeight(self, dc, wnd, pages):
        """
        Calculate the height (in pixels) of the tab region of a ribbon bar.

        Note that as the tab region can contain scroll buttons, the height should be
        greater than or equal to the minimum height for a tab scroll button.

        :param `dc`: A device context to use when one is required for size calculations;
        :param `wnd`: The window onto which the tabs will eventually be drawn;
        :param `pages`: The tabs which will acquire the returned height.

        """

        text_height = 0
        icon_height = 0

        if len(pages) <= 1 and (self._flags & RIBBON_BAR_ALWAYS_SHOW_TABS) == 0:        
            # To preserve space, a single tab need not be displayed. We still need
            # one pixel of border though.
            return 1        

        if self._flags & RIBBON_BAR_SHOW_PAGE_LABELS:        
            dc.SetFont(self._tab_active_label_font)
            text_height = dc.GetTextExtent("ABCDEFXj")[1]
        
        if self._flags & RIBBON_BAR_SHOW_PAGE_ICONS:
            for info in pages:
                if info.page.GetIcon().IsOk():                
                    icon_height = max(icon_height, info.page.GetIcon().GetHeight())

        return max(text_height, icon_height) + 10


    def DrawTab(self, dc, wnd, tab):
        """
        Draw a single tab in the tab region of a ribbon bar.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto (not the L{RibbonPage}
         associated with the tab being drawn);
        :param `tab`: The rectangle within which to draw, and also the tab label,
         icon, and state (active and/or hovered). The drawing rectangle will be
         entirely within a rectangle on the same device context previously painted
         with L{DrawTabCtrlBackground}. The rectangle's width will be at least the
         minimum value returned by L{GetBarTabWidth}, and height will be the value
         returned by L{GetTabCtrlHeight}.

        """

        if tab.rect.height <= 1:
            return

        dc.SetFont(self._tab_label_font)
        dc.SetPen(wx.TRANSPARENT_PEN)
        
        if tab.active or tab.hovered:        
            if tab.active:            
                dc.SetFont(self._tab_active_label_font)
                dc.SetBrush(self._background_brush)
                dc.DrawRectangle(tab.rect.x, tab.rect.y + tab.rect.height - 1, tab.rect.width - 1, 1)
            
            grad_rect = wx.Rect(*tab.rect)
            grad_rect.height -= 4
            grad_rect.width -= 1
            grad_rect.height /= 2
            grad_rect.y = grad_rect.y + tab.rect.height - grad_rect.height - 1
            dc.SetBrush(self._tab_active_top_background_brush)
            dc.DrawRectangle(tab.rect.x, tab.rect.y + 3, tab.rect.width - 1, grad_rect.y - tab.rect.y - 3)
            dc.GradientFillLinear(grad_rect, self._tab_active_background_colour, self._tab_active_background_gradient_colour, wx.SOUTH)
        
        else:
        
            btm_rect = wx.Rect(*tab.rect)
            btm_rect.height -= 4
            btm_rect.width -= 1
            btm_rect.height /= 2
            btm_rect.y = btm_rect.y + tab.rect.height - btm_rect.height - 1
            dc.SetBrush(self._tab_hover_background_brush)
            dc.DrawRectangle(btm_rect.x, btm_rect.y, btm_rect.width, btm_rect.height)
            grad_rect = wx.Rect(*tab.rect)
            grad_rect.width -= 1
            grad_rect.y += 3
            grad_rect.height = btm_rect.y - grad_rect.y
            dc.GradientFillLinear(grad_rect, self._tab_hover_background_top_colour, self._tab_hover_background_top_gradient_colour, wx.SOUTH)
        
        border_points = [wx.Point() for i in xrange(5)]
        border_points[0] = wx.Point(0, 3)
        border_points[1] = wx.Point(1, 2)
        border_points[2] = wx.Point(tab.rect.width - 3, 2)
        border_points[3] = wx.Point(tab.rect.width - 1, 4)
        border_points[4] = wx.Point(tab.rect.width - 1, tab.rect.height - 1)

        dc.SetPen(self._tab_border_pen)
        dc.DrawLines(border_points, tab.rect.x, tab.rect.y)

        old_clip = dc.GetClippingRect()
        is_first_tab = False

        bar = tab.page.GetParent()
        icon = wx.NullBitmap
        
        if isinstance(bar, BAR.RibbonBar) and bar.GetPage(0) == tab.page:
            is_first_tab = True

        if self._flags & RIBBON_BAR_SHOW_PAGE_ICONS:        
            icon = tab.page.GetIcon()
            if self._flags & RIBBON_BAR_SHOW_PAGE_LABELS == 0:
                if icon.IsOk():
                    x = tab.rect.x + (tab.rect.width - icon.GetWidth()) / 2
                    dc.DrawBitmap(icon, x, tab.rect.y + 1 + (tab.rect.height - 1 - icon.GetHeight()) / 2, True)
            
        if self._flags & RIBBON_BAR_SHOW_PAGE_LABELS:
            label = tab.page.GetLabel()
            
            if label.strip():            
                dc.SetTextForeground(self._tab_label_colour)
                dc.SetBackgroundMode(wx.TRANSPARENT)

                offset = 0
                
                if icon.IsOk():
                    offset += icon.GetWidth() + 2

                text_width, text_height = dc.GetTextExtent(label)
                x = (tab.rect.width - 2 - text_width - offset) / 2
                if x > 8:
                    x = 8
                elif x < 1:
                    x = 1
                    
                width = tab.rect.width - x - 2
                x += tab.rect.x + offset
                y = tab.rect.y + (tab.rect.height - text_height) / 2
                
                if icon.IsOk():                
                    dc.DrawBitmap(icon, x - offset, tab.rect.y + (tab.rect.height - icon.GetHeight()) / 2, True)
                
                dc.SetClippingRegion(x, tab.rect.y, width, tab.rect.height)
                dc.DrawText(label, x, y)
            
        # Draw the left hand edge of the tab only for the first tab (subsequent
        # tabs use the right edge of the prior tab as their left edge). As this is
        # outside the rectangle for the tab, only draw it if the leftmost part of
        # the tab is within the clip rectangle (the clip region has to be cleared
        # to draw outside the tab).
        if is_first_tab and old_clip.x <= tab.rect.x and tab.rect.x < old_clip.x + old_clip.width:        
            dc.DestroyClippingRegion()
            dc.DrawLine(tab.rect.x - 1, tab.rect.y + 4, tab.rect.x - 1, tab.rect.y + tab.rect.height - 1)
    

    def GetBarTabWidth(self, dc, wnd, label, bitmap, ideal=None, small_begin_need_separator=None,
                       small_must_have_separator=None, minimum=None):
        """
        Calculate the ideal and minimum width (in pixels) of a tab in a ribbon bar.

        :param `dc`: A device context to use when one is required for size calculations;
        :param `wnd`: The window onto which the tab will eventually be drawn;
        :param `label`: The tab's label (or an empty string if it has none);
        :param `bitmap`: The tab's icon (or `wx.NullBitmap` if it has none);
        :param `ideal`: The ideal width (in pixels) of the tab;
        :param `small_begin_need_separator`: A size less than the size, at which a tab
         separator should begin to be drawn (i.e. drawn, but still fairly transparent);
        :param `small_must_have_separator`: A size less than the size, at which a tab
         separator must be drawn (i.e. drawn at full opacity);
        :param `minimum`: A size less than the size, and greater than or equal to zero,
         which is the minimum pixel width for the tab.

        """

        width = mini = 0
        
        if self._flags & RIBBON_BAR_SHOW_PAGE_LABELS and label.strip():        
            dc.SetFont(self._tab_active_label_font)
            width += dc.GetTextExtent(label)[0]
            mini += min(30, width) # enough for a few chars
            
            if bitmap.IsOk():            
                # gap between label and bitmap
                width += 4
                mini += 2
            
        if self._flags & RIBBON_BAR_SHOW_PAGE_ICONS and bitmap.IsOk():
            width += bitmap.GetWidth()
            mini += bitmap.GetWidth()

        ideal = width + 16        
        small_begin_need_separator = mini        
        small_must_have_separator = mini        
        minimum = mini

        return ideal, small_begin_need_separator, small_must_have_separator, minimum


    def DrawTabSeparator(self, dc, wnd, rect, visibility):
        """
        Draw a separator between two tabs in a ribbon bar.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto;
        :param `rect`: The rectangle within which to draw, which will be entirely
         within a rectangle on the same device context previously painted with
         L{DrawTabCtrlBackground};
        :param `visibility`: The opacity with which to draw the separator. Values
         are in the range [0, 1], with 0 being totally transparent, and 1 being totally
         opaque.

        """

        # No explicit separators between tabs
        pass


    def DrawPageBackground(self, dc, wnd, rect):
        """
        Draw the background of a ribbon page.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto (which is commonly the
         L{RibbonPage} whose background is being drawn, but doesn't have to be);
        :param `rect`: The rectangle within which to draw.

        :see: L{RibbonMSWArtProvider.GetPageBackgroundRedrawArea}
        """

        dc.SetPen(wx.TRANSPARENT_PEN)
        dc.SetBrush(self._background_brush)
        dc.DrawRectangle(rect.x + 1, rect.y, rect.width - 2, rect.height - 1)

        dc.SetPen(self._page_border_pen)
        dc.DrawLine(rect.x, rect.y, rect.x, rect.y + rect.height)
        dc.DrawLine(rect.GetRight(), rect.y, rect.GetRight(), rect.y +rect.height)
        dc.DrawLine(rect.x, rect.GetBottom(), rect.GetRight()+1, rect.GetBottom())


    def GetScrollButtonMinimumSize(self, dc, wnd, style):
        """
        Calculate the minimum size (in pixels) of a scroll button.

        :param `dc`: A device context to use when one is required for size calculations;
        :param `wnd`: The window onto which the scroll button will eventually be drawn;
        :param `style`: A combination of flags from `RibbonScrollButtonStyle`, including
         a direction, and a for flag (state flags may be given too, but should be ignored,
         as a button should retain a constant size, regardless of its state).

        """

        return wx.Size(11, 11)


    def DrawScrollButton(self, dc, wnd, rect, style):
        """
        Draw a ribbon-style scroll button.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto;
        :param `rect`: The rectangle within which to draw. The size of this rectangle
         will be at least the size returned by L{GetScrollButtonMinimumSize} for a
         scroll button with the same style. For tab scroll buttons, this rectangle
         will be entirely within a rectangle on the same device context previously
         painted with L{DrawTabCtrlBackground}, but this is not guaranteed for other
         types of button (for example, page scroll buttons will not be painted on
         an area previously painted with L{DrawPageBackground});
        :param `style`: A combination of flags from `RibbonScrollButtonStyle`,
         including a direction, a for flag, and one or more states.

        """

        true_rect = wx.Rect(*rect)
        arrow_points = [wx.Point() for i in xrange(3)]

        if style & RIBBON_SCROLL_BTN_FOR_MASK == RIBBON_SCROLL_BTN_FOR_TABS:        
            true_rect.y += 2
            true_rect.height -= 2
            dc.SetPen(self._tab_border_pen)
        else:
            dc.SetPen(wx.TRANSPARENT_PEN)
            dc.SetBrush(self._background_brush)
            dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height)
            dc.SetPen(self._page_border_pen)

        result = style & RIBBON_SCROLL_BTN_DIRECTION_MASK
        
        if result == RIBBON_SCROLL_BTN_LEFT:
            dc.DrawLine(true_rect.GetRight(), true_rect.y, true_rect.GetRight(), true_rect.y + true_rect.height)
            arrow_points[0] = wx.Point(rect.width / 2 - 2, rect.height / 2)
            arrow_points[1] = arrow_points[0] + wx.Point(5, -5)
            arrow_points[2] = arrow_points[0] + wx.Point(5,  5)

        elif result == RIBBON_SCROLL_BTN_RIGHT:
            dc.DrawLine(true_rect.x, true_rect.y, true_rect.x, true_rect.y + true_rect.height)
            arrow_points[0] = wx.Point(rect.width / 2 + 3, rect.height / 2)
            arrow_points[1] = arrow_points[0] - wx.Point(5, -5)
            arrow_points[2] = arrow_points[0] - wx.Point(5,  5)

        elif result == RIBBON_SCROLL_BTN_DOWN:
            dc.DrawLine(true_rect.x, true_rect.y, true_rect.x + true_rect.width, true_rect.y)
            arrow_points[0] = wx.Point(rect.width / 2, rect.height / 2 + 3)
            arrow_points[1] = arrow_points[0] - wx.Point( 5, 5)
            arrow_points[2] = arrow_points[0] - wx.Point(-5, 5)

        elif result == RIBBON_SCROLL_BTN_UP:
            dc.DrawLine(true_rect.x, true_rect.GetBottom(), true_rect.x + true_rect.width, true_rect.GetBottom())
            arrow_points[0] = wx.Point(rect.width / 2, rect.height / 2 - 2)
            arrow_points[1] = arrow_points[0] + wx.Point( 5, 5)
            arrow_points[2] = arrow_points[0] + wx.Point(-5, 5)

        else:
            return
        
        x = rect.x
        y = rect.y

        if style & RIBBON_SCROLL_BTN_ACTIVE:        
            x += 1
            y += 1

        dc.SetPen(wx.TRANSPARENT_PEN)
        B = wx.Brush(self._tab_label_colour)
        dc.SetBrush(B)
        dc.DrawPolygon(arrow_points, x, y)


    def GetPanelSize(self, dc, wnd, client_size, client_offset=None):
        """
        Calculate the size of a panel for a given client size.

        This should increment the given size by enough to fit the panel label and other
        chrome.

        :param `dc`: A device context to use if one is required for size calculations;
        :param `wnd`: The ribbon panel in question;
        :param `client_size`: The client size;
        :param `client_offset`: The offset where the client rectangle begins within
         the panel (may be ``None``).

        :see: L{GetPanelClientSize}
        """

        dc.SetFont(self._panel_label_font)
        label_size = wx.Size(*dc.GetTextExtent(wnd.GetLabel()))
        label_height = label_size.GetHeight() + 5
        
        if self._flags & RIBBON_BAR_FLOW_VERTICAL:        
            client_size.IncBy(4, label_height + 6)
            if client_offset is not None:
                client_offset = wx.Point(2, label_height + 3)
        
        else:        
            client_size.IncBy(6, label_height + 4)
            if client_offset is not None:
                client_offset = wx.Point(3, label_height + 2)
        
        return client_size


    def GetPanelClientSize(self, dc, wnd, size, client_offset=None):
        """
        Calculate the client size of a panel for a given overall size.

        This should act as the inverse to L{GetPanelSize}, and decrement the given size
        by enough to fit the panel label and other chrome.

        :param `dc`: A device context to use if one is required for size calculations;
        :param `wnd`: The ribbon panel in question;
        :param `size`: The overall size to calculate client size for;
        :param `client_offset`: The offset where the returned client size begins within
         the given (may be ``None``).

        :see: L{GetPanelSize}
        """

        dc.SetFont(self._panel_label_font)
        label_size = wx.Size(*dc.GetTextExtent(wnd.GetLabel()))
        label_height = label_size.GetHeight() + 5

        if self._flags & RIBBON_BAR_FLOW_VERTICAL:        
            size.DecBy(4, label_height + 6)
            if client_offset is not None:
                client_offset = wx.Point(2, label_height + 3)
        
        else:        
            size.DecBy(6, label_height + 4)
            if client_offset is not None:
                client_offset = wx.Point(3, label_height + 2)

        if size.x < 0:
            size.x = 0
        if size.y < 0:
            size.y = 0
            
        return size, client_offset


    def DrawPanelBackground(self, dc, wnd, rect):
        """
        Draw the background and chrome for a ribbon panel.

        This should draw the border, background, label, and any other items of a panel
        which are outside the client area of a panel. Note that when a panel is
        minimised, this function is not called - only L{DrawMinimisedPanel} is called,
        so a background should be explicitly painted by that if required.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto, which is always the panel
         whose background and chrome is being drawn. The panel label and other panel
         attributes can be obtained by querying this;
        :param `rect`: The rectangle within which to draw.

        """

        dc.SetPen(wx.TRANSPARENT_PEN)
        dc.SetBrush(self._background_brush)
        dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height)

        true_rect = wx.Rect(*rect)
        true_rect = self.RemovePanelPadding(true_rect)

        dc.SetPen(self._panel_border_pen)
        dc.SetBrush(wx.TRANSPARENT_BRUSH)
        dc.DrawRectangle(true_rect.x, true_rect.y, true_rect.width, true_rect.height)

        true_rect.x += 1
        true_rect.width -= 2
        true_rect.y += 1

        dc.SetFont(self._panel_label_font)
        label_size = wx.Size(*dc.GetTextExtent(wnd.GetLabel()))
        label_height = label_size.GetHeight() + 5
        label_rect = wx.Rect(*true_rect)
        label_rect.height = label_height - 1
        
        dc.DrawLine(label_rect.x, label_rect.y + label_rect.height, label_rect.x + label_rect.width, label_rect.y + label_rect.height)

        label_bg_colour = self._panel_label_background_colour
        label_bg_grad_colour = self._panel_label_background_gradient_colour
        
        if wnd.IsHovered():        
            label_bg_colour = self._panel_hover_label_background_colour
            label_bg_grad_colour = self._panel_hover_label_background_gradient_colour
            dc.SetTextForeground(self._panel_hover_label_colour)
        else:        
            dc.SetTextForeground(self._panel_label_colour)

        if wx.Platform == "__WXMAC__":
            dc.GradientFillLinear(label_rect, label_bg_grad_colour, label_bg_colour, wx.SOUTH)
        else:
            dc.GradientFillLinear(label_rect, label_bg_colour, label_bg_grad_colour, wx.SOUTH)

        dc.SetFont(self._panel_label_font)
        dc.DrawText(wnd.GetLabel(), label_rect.x + 3, label_rect.y + 2)

        if wnd.IsHovered():
        
            gradient_rect = wx.Rect(*true_rect)
            gradient_rect.y += label_rect.height + 1
            gradient_rect.height = true_rect.height - label_rect.height - 3
            if wx.Platform == "__WXMAC__":
                colour = self._page_hover_background_gradient_colour
                gradient = self._page_hover_background_colour
            else:
                colour = self._page_hover_background_colour
                gradient = self._page_hover_background_gradient_colour

            dc.GradientFillLinear(gradient_rect, colour, gradient, wx.SOUTH)
        

    def DrawMinimisedPanel(self, dc, wnd, rect, bitmap):
        """
        Draw a minimised ribbon panel.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto, which is always the panel
         which is minimised. The panel label can be obtained from this window. The
         minimised icon obtained from querying the window may not be the size requested
         by L{RibbonMSWArtProvider.GetMinimisedPanelMinimumSize} - the argument contains the icon in the
         requested size;
        :param `rect`: The rectangle within which to draw. The size of the rectangle
         will be at least the size returned by L{RibbonMSWArtProvider.GetMinimisedPanelMinimumSize};
        :param `bitmap`: A copy of the panel's minimised bitmap rescaled to the size
         returned by L{RibbonMSWArtProvider.GetMinimisedPanelMinimumSize}.

        """

        dc.SetPen(wx.TRANSPARENT_PEN)
        dc.SetBrush(self._background_brush)
        dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height)

        true_rect = wx.Rect(*rect)
        true_rect = self.RemovePanelPadding(true_rect)

        dc.SetPen(self._panel_border_pen)
        dc.SetBrush(wx.TRANSPARENT_BRUSH)
        dc.DrawRectangle(true_rect.x, true_rect.y, true_rect.width, true_rect.height)
        true_rect.Deflate(1, 1)

        if wnd.IsHovered() or wnd.GetExpandedPanel():
            colour = self._page_hover_background_colour
            gradient = self._page_hover_background_gradient_colour
            if (wx.Platform == "__WXMAC__" and not wnd.GetExpandedPanel()) or \
               (wx.Platform != "__WXMAC__" and wnd.GetExpandedPanel()):
                temp = colour
                colour = gradient
                gradient = temp
            
            dc.GradientFillLinear(true_rect, colour, gradient, wx.SOUTH)
        
        preview = self.DrawMinimisedPanelCommon(dc, wnd, true_rect)

        dc.SetPen(self._panel_border_pen)
        dc.SetBrush(wx.TRANSPARENT_BRUSH)
        dc.DrawRectangle(preview.x, preview.y, preview.width, preview.height)
        preview.Deflate(1, 1)

        preview_caption_rect = wx.Rect(*preview)
        preview_caption_rect.height = 7
        preview.y += preview_caption_rect.height
        preview.height -= preview_caption_rect.height
        
        if wx.Platform == "__WXMAC__":
            dc.GradientFillLinear(preview_caption_rect, self._panel_hover_label_background_gradient_colour,
                                  self._panel_hover_label_background_colour, wx.SOUTH)
            dc.GradientFillLinear(preview, self._page_hover_background_gradient_colour,
                                  self._page_hover_background_colour, wx.SOUTH)
        else:
            dc.GradientFillLinear(preview_caption_rect, self._panel_hover_label_background_colour,
                                  self._panel_hover_label_background_gradient_colour, wx.SOUTH)
            dc.GradientFillLinear(preview, self._page_hover_background_colour,
                                  self._page_hover_background_gradient_colour, wx.SOUTH)

        if bitmap.IsOk():        
            dc.DrawBitmap(bitmap, preview.x + (preview.width - bitmap.GetWidth()) / 2,
                          preview.y + (preview.height - bitmap.GetHeight()) / 2, True)
        

    def DrawPartialPanelBackground(self, dc, wnd, rect):

        dc.SetPen(wx.TRANSPARENT_PEN)
        dc.SetBrush(self._background_brush)
        dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height)

        offset = wx.Point(*wnd.GetPosition())
        parent = wnd.GetParent()
        panel = None

        while 1:
            panel = parent
            if isinstance(panel, PANEL.RibbonPanel):
                if not panel.IsHovered():
                    return
                break
            
            offset += parent.GetPosition()
            parent = panel.GetParent()
        
        if panel is None:
            return

        background = wx.Rect(0, 0, *panel.GetSize())
        background = self.RemovePanelPadding(background)
        
        background.x += 1
        background.width -= 2
        dc.SetFont(self._panel_label_font)
        caption_height = dc.GetTextExtent(panel.GetLabel())[1] + 7
        background.y += caption_height - 1
        background.height -= caption_height

        paint_rect = wx.Rect(*rect)
        paint_rect.x += offset.x
        paint_rect.y += offset.y

        if wx.Platform == "__WXMAC__":
            bg_grad_clr = self._page_hover_background_colour
            bg_clr = self._page_hover_background_gradient_colour
        else:
            bg_clr = self._page_hover_background_colour
            bg_grad_clr = self._page_hover_background_gradient_colour

        paint_rect.Intersect(background)
        
        if not paint_rect.IsEmpty():
            starting_colour = RibbonInterpolateColour(bg_clr, bg_grad_clr, paint_rect.y, background.y, background.y + background.height)
            ending_colour = RibbonInterpolateColour(bg_clr, bg_grad_clr, paint_rect.y + paint_rect.height, background.y, background.y + background.height)
            paint_rect.x -= offset.x
            paint_rect.y -= offset.y
            dc.GradientFillLinear(paint_rect, starting_colour, ending_colour, wx.SOUTH)

    
    def DrawGalleryBackground(self, dc, wnd, rect):
        """
        Draw the background and chrome for a L{RibbonGallery} control.

        This should draw the border, brackground, scroll buttons, extension button, and
        any other UI elements which are not attached to a specific gallery item.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto, which is always the gallery
         whose background and chrome is being drawn. Attributes used during drawing like
         the gallery hover state and individual button states can be queried from this
         parameter by L{RibbonGallery.IsHovered}, L{RibbonGallery.GetExtensionButtonState},
         L{RibbonGallery.GetUpButtonState}, and L{RibbonGallery.GetDownButtonState};
        :param `rect`: The rectangle within which to draw. This rectangle is the entire
         area of the gallery control, not just the client rectangle.

        """

        self.DrawPartialPanelBackground(dc, wnd, rect)

        if wnd.IsHovered():        
            dc.SetPen(wx.TRANSPARENT_PEN)
            dc.SetBrush(self._gallery_hover_background_brush)
            
            if self._flags & RIBBON_BAR_FLOW_VERTICAL:            
                dc.DrawRectangle(rect.x + 1, rect.y + 1, rect.width - 2, rect.height - 16)            
            else:            
                dc.DrawRectangle(rect.x + 1, rect.y + 1, rect.width - 16, rect.height - 2)
            
        dc.SetPen(self._gallery_border_pen)
        dc.SetBrush(wx.TRANSPARENT_BRUSH)
        dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height)
        
        self.DrawGalleryBackgroundCommon(dc, wnd, rect)


    def DrawGalleryButton(self, dc, rect, state, bitmaps):

        extra_height = 0
        extra_width = 0
        reduced_rect = wx.Rect(*rect)
        reduced_rect.Deflate(1, 1)
        
        if self._flags & RIBBON_BAR_FLOW_VERTICAL:        
            reduced_rect.width += 1
            extra_width = 1
        else:        
            reduced_rect.height += 1
            extra_height = 1
        
        if state == RIBBON_GALLERY_BUTTON_NORMAL:
            dc.GradientFillLinear(reduced_rect, self._gallery_button_background_colour, self._gallery_button_background_gradient_colour, wx.SOUTH)
            btn_bitmap = bitmaps[0]

        elif state == RIBBON_GALLERY_BUTTON_HOVERED:
            dc.SetPen(self._gallery_item_border_pen)
            dc.SetBrush(self._gallery_button_hover_background_brush)
            dc.DrawRectangle(rect.x, rect.y, rect.width + extra_width, rect.height + extra_height)
            btn_bitmap = bitmaps[1]

        elif state == RIBBON_GALLERY_BUTTON_ACTIVE:
            dc.SetPen(self._gallery_item_border_pen)
            dc.SetBrush(self._gallery_button_active_background_brush)
            dc.DrawRectangle(rect.x, rect.y, rect.width + extra_width, rect.height + extra_height)
            btn_bitmap = bitmaps[2]

        elif state == RIBBON_GALLERY_BUTTON_DISABLED:
            dc.SetPen(wx.TRANSPARENT_PEN)
            dc.SetBrush(self._gallery_button_disabled_background_brush)
            dc.DrawRectangle(reduced_rect.x, reduced_rect.y, reduced_rect.width, reduced_rect.height)
            btn_bitmap = bitmaps[3]        

        dc.DrawBitmap(btn_bitmap, reduced_rect.x + reduced_rect.width / 2 - 2, (rect.y + rect.height / 2) - 2, True)


    def DrawGalleryItemBackground(self, dc, wnd, rect, item):
        """
        Draw the background of a single item in a L{RibbonGallery} control.

        This is painted on top of a gallery background, and behind the items bitmap.
        Unlike L{DrawButtonBarButton} and L{DrawTool}, it is not expected to draw the
        item bitmap - that is done by the gallery control itself.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto, which is always the gallery
         which contains the item being drawn;
        :param `rect`: The rectangle within which to draw. The size of this rectangle
         will be the size of the item's bitmap, expanded by gallery item padding values
         (``RIBBON_ART_GALLERY_BITMAP_PADDING_LEFT_SIZE``, ``RIBBON_ART_GALLERY_BITMAP_PADDING_RIGHT_SIZE``,
         ``RIBBON_ART_GALLERY_BITMAP_PADDING_TOP_SIZE``, and ``RIBBON_ART_GALLERY_BITMAP_PADDING_BOTTOM_SIZE``).
         The drawing rectangle will be entirely within a rectangle on the same device
         context previously painted with L{DrawGalleryBackground};
        :param `item`: The item whose background is being painted. Typically the
         background will vary if the item is hovered, active, or selected;
         L{RibbonGallery.GetSelection}, L{RibbonGallery.GetActiveItem}, and
         L{RibbonGallery.GetHoveredItem} can be called to test if the given item is in one of these states.

        """

        if wnd.GetHoveredItem() != item and wnd.GetActiveItem() != item and wnd.GetSelection() != item:
            return

        dc.SetPen(self._gallery_item_border_pen)
        
        if wnd.GetActiveItem() == item or wnd.GetSelection() == item:
            dc.SetBrush(self._gallery_button_active_background_brush)
        else:
            dc.SetBrush(self._gallery_button_hover_background_brush)

        dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height)


    def DrawButtonBarBackground(self, dc, wnd, rect):
        """
        Draw the background for a L{bar.RibbonButtonBar} control.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto (which will typically
         be the button bar itself, though this is not guaranteed);
        :param `rect`: The rectangle within which to draw.

        """

        self.DrawPartialPanelBackground(dc, wnd, rect)


    def DrawButtonBarButton(self, dc, wnd, rect, kind, state, label, bitmap_large, bitmap_small):
        """
        Draw a single button for a L{bar.RibbonButtonBar} control.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto;
        :param `rect`: The rectangle within which to draw. The size of this rectangle
         will be a size previously returned by L{RibbonMSWArtProvider.GetButtonBarButtonSize}, and the
         rectangle will be entirely within a rectangle on the same device context
         previously painted with L{DrawButtonBarBackground};
        :param `kind`: The kind of button to draw (normal, dropdown or hybrid);
        :param `state`: Combination of a size flag and state flags from the
         `RibbonButtonBarButtonState` enumeration;
        :param `label`: The label of the button;
        :param `bitmap_large`: The large bitmap of the button (or the large disabled
         bitmap when ``RIBBON_BUTTONBAR_BUTTON_DISABLED`` is set in );
        :param `bitmap_small`: The small bitmap of the button (or the small disabled
         bitmap when ``RIBBON_BUTTONBAR_BUTTON_DISABLED`` is set in ).

        """

        if kind == RIBBON_BUTTON_TOGGLE:
            kind = RIBBON_BUTTON_NORMAL
            if state & RIBBON_BUTTONBAR_BUTTON_TOGGLED:
                state ^= RIBBON_BUTTONBAR_BUTTON_ACTIVE_MASK
    
        if state & (RIBBON_BUTTONBAR_BUTTON_HOVER_MASK | RIBBON_BUTTONBAR_BUTTON_ACTIVE_MASK):
            dc.SetPen(self._button_bar_hover_border_pen)
            bg_rect = wx.Rect(*rect)
            bg_rect.Deflate(1, 1)

            if kind == RIBBON_BUTTON_HYBRID:
                result = state & RIBBON_BUTTONBAR_BUTTON_SIZE_MASK
                
                if result == RIBBON_BUTTONBAR_BUTTON_LARGE:
                    iYBorder = rect.y + bitmap_large.GetHeight() + 4
                    partial_bg = wx.Rect(*rect)
                    
                    if state & RIBBON_BUTTONBAR_BUTTON_NORMAL_HOVERED:                    
                        partial_bg.SetBottom(iYBorder - 1)                    
                    else:                    
                        partial_bg.height -= (iYBorder - partial_bg.y + 1)
                        partial_bg.y = iYBorder + 1
                    
                    dc.DrawLine(rect.x, iYBorder, rect.x + rect.width, iYBorder)
                    bg_rect.Intersect(partial_bg)

                elif result == RIBBON_BUTTONBAR_BUTTON_MEDIUM:                    
                    iArrowWidth = 9
                    
                    if state & RIBBON_BUTTONBAR_BUTTON_NORMAL_HOVERED:                    
                        bg_rect.width -= iArrowWidth
                        dc.DrawLine(bg_rect.x + bg_rect.width, rect.y, bg_rect.x + bg_rect.width, rect.y + rect.height)                    
                    else:                   
                        iArrowWidth -= 1
                        bg_rect.x += bg_rect.width - iArrowWidth
                        bg_rect.width = iArrowWidth
                        dc.DrawLine(bg_rect.x - 1, rect.y, bg_rect.x - 1, rect.y + rect.height)

            dc.SetBrush(wx.TRANSPARENT_BRUSH)
            dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height)

            dc.SetPen(wx.TRANSPARENT_PEN)
            
            if state & RIBBON_BUTTONBAR_BUTTON_ACTIVE_MASK:
                dc.SetBrush(self._button_bar_active_background_brush)
            else:
                dc.SetBrush(self._button_bar_hover_background_brush)
                
            dc.DrawRectangle(bg_rect.x, bg_rect.y, bg_rect.width, bg_rect.height)
        
        dc.SetFont(self._button_bar_label_font)
        dc.SetTextForeground(self._button_bar_label_colour)
        self.DrawButtonBarButtonForeground(dc, rect, kind, state, label, bitmap_large, bitmap_small)


    def DrawToolBarBackground(self, dc, wnd, rect):
        """
        Draw the background for a L{RibbonToolBar} control.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The which is being drawn onto. In most cases this will be
         a L{RibbonToolBar}, but it doesn't have to be;
        :param `rect`: The rectangle within which to draw. Some of this rectangle
         will later be drawn over using L{DrawToolGroupBackground} and L{DrawTool},
         but not all of it will (unless there is only a single group of tools).

        """

        self.DrawPartialPanelBackground(dc, wnd, rect)


    def DrawToolGroupBackground(self, dc, wnd, rect):
        """
        Draw the background for a group of tools on a L{RibbonToolBar} control.

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto. In most cases this will
         be a L{RibbonToolBar}, but it doesn't have to be;
        :param `rect`: The rectangle within which to draw. This rectangle is a union
         of the individual tools' rectangles. As there are no gaps between tools, this
         rectangle will be painted over exactly once by calls to L{DrawTool}. The
         group background could therefore be painted by L{DrawTool}, though it can be
         conceptually easier and more efficient to draw it all at once here. The
         rectangle will be entirely within a rectangle on the same device context
         previously painted with L{DrawToolBarBackground}.

        """

        dc.SetPen(self._toolbar_border_pen)
        dc.SetBrush(wx.TRANSPARENT_BRUSH)
        dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height)
        bg_rect = wx.Rect(*rect)
        bg_rect.Deflate(1, 1)
        dc.GradientFillLinear(bg_rect, self._tool_background_colour, self._tool_background_gradient_colour, wx.SOUTH)


    def DrawTool(self, dc, wnd, rect, bitmap, kind, state):
        """
        Draw a single tool (for a L{RibbonToolBar} control).

        :param `dc`: The device context to draw onto;
        :param `wnd`: The window which is being drawn onto. In most cases this will
         be a L{RibbonToolBar}, but it doesn't have to be;
        :param `rect`: The rectangle within which to draw. The size of this rectangle
         will at least the size returned by L{RibbonMSWArtProvider.GetToolSize}, and the height of it will
         be equal for all tools within the same group. The rectangle will be entirely
         within a rectangle on the same device context previously painted with
         L{DrawToolGroupBackground};
        :param `bitmap`: The bitmap to use as the tool's foreground. If the tool is a
         hybrid or dropdown tool, then the foreground should also contain a standard
         dropdown button;
        :param `kind`: The kind of tool to draw (normal, dropdown, or hybrid);
        :param `state`: A combination of `RibbonToolBarToolState` flags giving the
         state of the tool and it's relative position within a tool group.

        """

        bg_rect = wx.Rect(*rect)
        bg_rect.Deflate(1, 1)
        
        if state & RIBBON_TOOLBAR_TOOL_LAST == 0:
            bg_rect.width += 1
            
        is_custom_bg = (state & (RIBBON_TOOLBAR_TOOL_HOVER_MASK | RIBBON_TOOLBAR_TOOL_ACTIVE_MASK)) != 0
        is_split_hybrid = kind == RIBBON_BUTTON_HYBRID and is_custom_bg

        # Background
        if is_custom_bg:        
            dc.SetPen(wx.TRANSPARENT_PEN)
            dc.SetBrush(self._tool_hover_background_brush)
            dc.DrawRectangle(bg_rect.x, bg_rect.y, bg_rect.width, bg_rect.height)
            
            if state & RIBBON_TOOLBAR_TOOL_ACTIVE_MASK:            
                active_rect = wx.Rect(*bg_rect)
                
                if kind == RIBBON_BUTTON_HYBRID:                
                    active_rect.width -= 8
                    
                    if state & RIBBON_TOOLBAR_TOOL_DROPDOWN_ACTIVE:                    
                        active_rect.x += active_rect.width
                        active_rect.width = 8
                    
                dc.SetBrush(self._tool_active_background_brush)
                dc.DrawRectangle(active_rect.x, active_rect.y, active_rect.width, active_rect.height)

        # Border
        if is_custom_bg:
            dc.SetPen(self._toolbar_hover_borden_pen)
        else:
            dc.SetPen(self._toolbar_border_pen)
            
        if state & RIBBON_TOOLBAR_TOOL_FIRST == 0:
            existing = dc.GetPixel(rect.x, rect.y + 1)
            
            if existing == wx.NullColour or existing != self._toolbar_hover_borden_pen.GetColour():            
                dc.DrawLine(rect.x, rect.y + 1, rect.x, rect.y + rect.height - 1)
                    
        if is_custom_bg:
            border_rect = wx.Rect(*bg_rect)
            border_rect.Inflate(1, 1)
            dc.SetBrush(wx.TRANSPARENT_BRUSH)
            dc.DrawRectangle(border_rect.x, border_rect.y, border_rect.width, border_rect.height)
        
        # Foreground
        avail_width = bg_rect.GetWidth()

        if kind != RIBBON_BUTTON_NORMAL:        
            avail_width -= 8
            if is_split_hybrid:            
                dc.DrawLine(rect.x + avail_width + 1, rect.y, rect.x + avail_width + 1, rect.y + rect.height)
            
            dc.DrawBitmap(self._toolbar_drop_bitmap, bg_rect.x + avail_width + 2, bg_rect.y + (bg_rect.height / 2) - 2, True)
        
        dc.DrawBitmap(bitmap, bg_rect.x + (avail_width - bitmap.GetWidth()) / 2, bg_rect.y + (bg_rect.height - bitmap.GetHeight()) / 2, True)