src/msw/combo.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/combo.cpp
   3 // Purpose:     wxMSW wxComboCtrl
   4 // Author:      Jaakko Salli
   5 // Modified by:
   6 // Created:     Apr-30-2006
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2005 Jaakko Salli
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_COMBOCTRL
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/log.h"
  30     #include "wx/combobox.h"
  31     #include "wx/dcclient.h"
  32     #include "wx/settings.h"
  33     #include "wx/dialog.h"
  34     #include "wx/stopwatch.h"
  35 #endif
  36
  37 #include "wx/dcbuffer.h"
  38 #include "wx/combo.h"
  39
  40 #include "wx/msw/registry.h"
  41 #if wxUSE_UXTHEME
  42 #include "wx/msw/uxtheme.h"
  43 #endif
  44 #include "wx/msw/dc.h"
  45
  46 // Change to #if 1 to include tmschema.h for easier testing of theme
  47 // parameters.
  48 #if 0
  49     #include <tmschema.h>
  50     #include <VSStyle.h>
  51 #else
  52     //----------------------------------
  53     #define EP_EDITTEXT         1
  54     #define ETS_NORMAL          1
  55     #define ETS_HOT             2
  56     #define ETS_SELECTED        3
  57     #define ETS_DISABLED        4
  58     #define ETS_FOCUSED         5
  59     #define ETS_READONLY        6
  60     #define ETS_ASSIST          7
  61     #define TMT_FILLCOLOR       3802
  62     #define TMT_TEXTCOLOR       3803
  63     #define TMT_BORDERCOLOR     3801
  64     #define TMT_EDGEFILLCOLOR   3808
  65     #define TMT_BGTYPE          4001
  66
  67     #define BT_IMAGEFILE        0
  68     #define BT_BORDERFILL       1
  69
  70     #define CP_DROPDOWNBUTTON           1
  71     #define CP_BACKGROUND               2 // This and above are Vista and later only
  72     #define CP_TRANSPARENTBACKGROUND    3
  73     #define CP_BORDER                   4
  74     #define CP_READONLY                 5
  75     #define CP_DROPDOWNBUTTONRIGHT      6
  76     #define CP_DROPDOWNBUTTONLEFT       7
  77     #define CP_CUEBANNER                8
  78
  79     #define CBXS_NORMAL                 1
  80     #define CBXS_HOT                    2
  81     #define CBXS_PRESSED                3
  82     #define CBXS_DISABLED               4
  83
  84     #define CBXSR_NORMAL                1
  85     #define CBXSR_HOT                   2
  86     #define CBXSR_PRESSED               3
  87     #define CBXSR_DISABLED              4
  88
  89     #define CBXSL_NORMAL                1
  90     #define CBXSL_HOT                   2
  91     #define CBXSL_PRESSED               3
  92     #define CBXSL_DISABLED              4
  93
  94     #define CBTBS_NORMAL                1
  95     #define CBTBS_HOT                   2
  96     #define CBTBS_DISABLED              3
  97     #define CBTBS_FOCUSED               4
  98
  99     #define CBB_NORMAL                  1
 100     #define CBB_HOT                     2
 101     #define CBB_FOCUSED                 3
 102     #define CBB_DISABLED                4
 103
 104     #define CBRO_NORMAL                 1
 105     #define CBRO_HOT                    2
 106     #define CBRO_PRESSED                3
 107     #define CBRO_DISABLED               4
 108
 109     #define CBCB_NORMAL                 1
 110     #define CBCB_HOT                    2
 111     #define CBCB_PRESSED                3
 112     #define CBCB_DISABLED               4
 113
 114 #endif
 115
 116
 117 #define NATIVE_TEXT_INDENT_XP       4
 118 #define NATIVE_TEXT_INDENT_CLASSIC  2
 119
 120 #define COMBOBOX_ANIMATION_RESOLUTION   10
 121
 122 #define COMBOBOX_ANIMATION_DURATION     200  // In milliseconds
 123
 124 #define wxMSW_DESKTOP_USERPREFERENCESMASK_COMBOBOXANIM    (1<<2)
 125
 126
 127 // ============================================================================
 128 // implementation
 129 // ============================================================================
 130
 131
 132 BEGIN_EVENT_TABLE(wxComboCtrl, wxComboCtrlBase)
 133     EVT_PAINT(wxComboCtrl::OnPaintEvent)
 134     EVT_MOUSE_EVENTS(wxComboCtrl::OnMouseEvent)
 135 #if wxUSE_COMBOCTRL_POPUP_ANIMATION
 136     EVT_TIMER(wxID_ANY, wxComboCtrl::OnTimerEvent)
 137 #endif
 138 END_EVENT_TABLE()
 139
 140
 141 IMPLEMENT_DYNAMIC_CLASS(wxComboCtrl, wxComboCtrlBase)
 142
 143 void wxComboCtrl::Init()
 144 {
 145 }
 146
 147 bool wxComboCtrl::Create(wxWindow *parent,
 148                             wxWindowID id,
 149                             const wxString& value,
 150                             const wxPoint& pos,
 151                             const wxSize& size,
 152                             long style,
 153                             const wxValidator& validator,
 154                             const wxString& name)
 155 {
 156
 157     // Set border
 158     long border = style & wxBORDER_MASK;
 159
 160 #if wxUSE_UXTHEME
 161     wxUxThemeEngine* theme = wxUxThemeEngine::GetIfActive();
 162 #endif
 163
 164     if ( !border )
 165     {
 166 #if wxUSE_UXTHEME
 167         if ( theme )
 168         {
 169             // For XP, have 1-width custom border, for older version use sunken
 170             border = wxBORDER_NONE;
 171             m_widthCustomBorder = 1;
 172         }
 173         else
 174 #endif
 175             border = wxBORDER_SUNKEN;
 176
 177         style = (style & ~(wxBORDER_MASK)) | border;
 178     }
 179
 180     // create main window
 181     if ( !wxComboCtrlBase::Create(parent,
 182                            id,
 183                            value,
 184                            pos,
 185                            size,
 186                            style | wxFULL_REPAINT_ON_RESIZE,
 187                            validator,
 188                            name) )
 189         return false;
 190
 191 #if wxUSE_UXTHEME
 192     if ( theme )
 193     {
 194         if ( ::wxGetWinVersion() >= wxWinVersion_Vista )
 195             m_iFlags |= wxCC_BUTTON_STAYS_DOWN |wxCC_BUTTON_COVERS_BORDER;
 196     }
 197 #endif
 198
 199     if ( style & wxCC_STD_BUTTON )
 200         m_iFlags |= wxCC_POPUP_ON_MOUSE_UP;
 201
 202     // Prepare background for double-buffering or better background theme
 203     // support, whichever is possible.
 204     SetDoubleBuffered(true);
 205     if ( !IsDoubleBuffered() )
 206         SetBackgroundStyle( wxBG_STYLE_PAINT );
 207
 208     // Create textctrl, if necessary
 209     CreateTextCtrl( wxNO_BORDER );
 210
 211     // Add keyboard input handlers for main control and textctrl
 212     InstallInputHandlers();
 213
 214     // SetInitialSize should be called last
 215     SetInitialSize(size);
 216
 217     return true;
 218 }
 219
 220 wxComboCtrl::~wxComboCtrl()
 221 {
 222 }
 223
 224 void wxComboCtrl::OnResize()
 225 {
 226     //
 227     // Recalculates button and textctrl areas
 228
 229     // Technically Classic Windows style combo has more narrow button,
 230     // but the native renderer doesn't paint it well like that.
 231     int btnWidth = 17;
 232     CalculateAreas(btnWidth);
 233
 234     // Position textctrl using standard routine
 235     PositionTextCtrl();
 236 }
 237
 238 // Draws non-XP GUI dotted line around the focus area
 239 static void wxMSWDrawFocusRect( wxDC& dc, const wxRect& rect )
 240 {
 241 #if !defined(__WXWINCE__)
 242     /*
 243     RECT mswRect;
 244     mswRect.left = rect.x;
 245     mswRect.top = rect.y;
 246     mswRect.right = rect.x + rect.width;
 247     mswRect.bottom = rect.y + rect.height;
 248     HDC hdc = (HDC) dc.GetHDC();
 249     SetMapMode(hdc,MM_TEXT); // Just in case...
 250     DrawFocusRect(hdc,&mswRect);
 251     */
 252     // FIXME: Use DrawFocusRect code above (currently it draws solid line
 253     //   for caption focus but works ok for other stuff).
 254     //   Also, this code below may not work in future wx versions, since
 255     //   it employs wxCAP_BUTT hack to have line of width 1.
 256     dc.SetLogicalFunction(wxINVERT);
 257
 258     wxPen pen(*wxBLACK, 1, wxPENSTYLE_DOT);
 259     pen.SetCap(wxCAP_BUTT);
 260     dc.SetPen(pen);
 261     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 262
 263     dc.DrawRectangle(rect);
 264
 265     dc.SetLogicalFunction(wxCOPY);
 266 #else
 267     dc.SetLogicalFunction(wxINVERT);
 268
 269     dc.SetPen(wxPen(*wxBLACK,1,wxDOT));
 270     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 271
 272     dc.DrawRectangle(rect);
 273
 274     dc.SetLogicalFunction(wxCOPY);
 275 #endif
 276 }
 277
 278 // draw focus background on area in a way typical on platform
 279 void
 280 wxComboCtrl::PrepareBackground( wxDC& dc, const wxRect& rect, int flags ) const
 281 {
 282 #if wxUSE_UXTHEME
 283     wxUxThemeHandle hTheme(this, L"COMBOBOX");
 284 #endif
 285
 286     wxSize sz = GetClientSize();
 287     bool isEnabled;
 288     bool doDrawFocusRect; // also selected
 289
 290     // For smaller size control (and for disabled background) use less spacing
 291     int focusSpacingX;
 292     int focusSpacingY;
 293
 294     if ( !(flags & wxCONTROL_ISSUBMENU) )
 295     {
 296         // Drawing control
 297         isEnabled = IsThisEnabled();
 298         doDrawFocusRect = ShouldDrawFocus();
 299
 300 #if wxUSE_UXTHEME
 301         // Windows-style: for smaller size control (and for disabled background) use less spacing
 302         if ( hTheme )
 303         {
 304             // WinXP  Theme
 305             focusSpacingX = isEnabled ? 2 : 1;
 306             focusSpacingY = sz.y > (GetCharHeight()+2) && isEnabled ? 2 : 1;
 307         }
 308         else
 309 #endif
 310         {
 311             // Classic Theme
 312             if ( isEnabled )
 313             {
 314                 focusSpacingX = 1;
 315                 focusSpacingY = 1;
 316             }
 317             else
 318             {
 319                 focusSpacingX = 0;
 320                 focusSpacingY = 0;
 321             }
 322         }
 323     }
 324     else
 325     {
 326         // Drawing a list item
 327         isEnabled = true; // they are never disabled
 328         doDrawFocusRect = flags & wxCONTROL_SELECTED ? true : false;
 329
 330         focusSpacingX = 0;
 331         focusSpacingY = 0;
 332     }
 333
 334     // Set the background sub-rectangle for selection, disabled etc
 335     wxRect selRect(rect);
 336     selRect.y += focusSpacingY;
 337     selRect.height -= (focusSpacingY*2);
 338
 339     int wcp = 0;
 340
 341     if ( !(flags & wxCONTROL_ISSUBMENU) )
 342         wcp += m_widthCustomPaint;
 343
 344     selRect.x += wcp + focusSpacingX;
 345     selRect.width -= wcp + (focusSpacingX*2);
 346
 347     //wxUxThemeEngine* theme = NULL;
 348     //if ( hTheme )
 349     //    theme = wxUxThemeEngine::GetIfActive();
 350
 351     wxColour fgCol;
 352     wxColour bgCol;
 353     bool doDrawDottedEdge = false;
 354     bool doDrawSelRect = true;
 355
 356     // TODO: doDrawDottedEdge = true when focus has arrived to control via tab.
 357     //       (and other cases which are not that apparent).
 358
 359     if ( isEnabled )
 360     {
 361         // If popup is hidden and this control is focused,
 362         // then draw the focus-indicator (selbgcolor background etc.).
 363         if ( doDrawFocusRect )
 364         {
 365             // NB: We can't really use XP visual styles to get TMT_TEXTCOLOR since
 366             //     it is not properly defined for combo boxes. Instead, they expect
 367             //     you to use DrawThemeText.
 368             //
 369             //    Here is, however, sample code how to get theme colours:
 370             //
 371             //    COLORREF cref;
 372             //    theme->GetThemeColor(hTheme,EP_EDITTEXT,ETS_NORMAL,TMT_TEXTCOLOR,&cref);
 373             //    dc.SetTextForeground( wxRGBToColour(cref) );
 374             if ( (m_iFlags & wxCC_FULL_BUTTON) && !(flags & wxCONTROL_ISSUBMENU) )
 375             {
 376                 // Vista style read-only combo
 377                 fgCol = GetForegroundColour();
 378                 bgCol = GetBackgroundColour();
 379                 doDrawSelRect = false;
 380                 doDrawDottedEdge = true;
 381             }
 382             else
 383             {
 384                 fgCol = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
 385                 bgCol = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
 386             }
 387         }
 388         else
 389         {
 390             fgCol = GetForegroundColour();
 391             bgCol = GetBackgroundColour();
 392             doDrawSelRect = false;
 393         }
 394     }
 395     else
 396     {
 397         fgCol = wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT);
 398         bgCol = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
 399     }
 400
 401     dc.SetTextForeground(fgCol);
 402     dc.SetBrush(bgCol);
 403     if ( doDrawSelRect )
 404     {
 405         dc.SetPen(bgCol);
 406         dc.DrawRectangle(selRect);
 407     }
 408
 409     if ( doDrawDottedEdge )
 410         wxMSWDrawFocusRect(dc, selRect);
 411
 412     // Don't clip exactly to the selection rectangle so we can draw
 413     // to the non-selected area in front of it.
 414     wxRect clipRect(rect.x,rect.y,
 415                     (selRect.x+selRect.width)-rect.x-1,rect.height);
 416     dc.SetClippingRegion(clipRect);
 417 }
 418
 419 void wxComboCtrl::OnPaintEvent( wxPaintEvent& WXUNUSED(event) )
 420 {
 421     // TODO: Convert drawing in this function to Windows API Code
 422
 423     wxSize sz = GetClientSize();
 424     wxDC* dcPtr = wxAutoBufferedPaintDCFactory(this);
 425     wxDC& dc = *dcPtr;
 426
 427     const wxRect& rectButton = m_btnArea;
 428     wxRect rectTextField = m_tcArea;
 429
 430     // FIXME: Either SetBackgroundColour or GetBackgroundColour
 431     //        doesn't work under Vista, so here's a temporary
 432     //        workaround.
 433     //        In the theme-less rendering code below, this fixes incorrect
 434     //        background on read-only comboboxes (they are gray, but should be
 435     //        white).
 436     wxColour bgCol = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
 437
 438 #if wxUSE_UXTHEME
 439     const bool isEnabled = IsThisEnabled();
 440
 441     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 442     HDC hDc = GetHdcOf(*impl);
 443     HWND hWnd = GetHwndOf(this);
 444
 445     wxUxThemeEngine* theme = NULL;
 446     wxUxThemeHandle hTheme(this, L"COMBOBOX");
 447
 448     if ( hTheme )
 449         theme = wxUxThemeEngine::GetIfActive();
 450 #endif // wxUSE_UXTHEME
 451
 452     wxRect borderRect(0,0,sz.x,sz.y);
 453
 454     if ( m_iFlags & wxCC_IFLAG_BUTTON_OUTSIDE )
 455     {
 456         borderRect = m_tcArea;
 457         borderRect.Inflate(1);
 458     }
 459
 460     int drawButFlags = 0;
 461
 462 #if wxUSE_UXTHEME
 463     if ( hTheme )
 464     {
 465         const bool useVistaComboBox = ::wxGetWinVersion() >= wxWinVersion_Vista;
 466
 467         RECT rFull;
 468         wxCopyRectToRECT(borderRect, rFull);
 469
 470         RECT rButton;
 471         wxCopyRectToRECT(rectButton, rButton);
 472
 473         RECT rBorder;
 474         wxCopyRectToRECT(borderRect, rBorder);
 475
 476         bool isNonStdButton = (m_iFlags & wxCC_IFLAG_BUTTON_OUTSIDE) ||
 477                               (m_iFlags & wxCC_IFLAG_HAS_NONSTANDARD_BUTTON);
 478
 479         //
 480         // Get some states for themed drawing
 481         int butState;
 482
 483         if ( !isEnabled )
 484         {
 485             butState = CBXS_DISABLED;
 486         }
 487         // Vista will display the drop-button as depressed always
 488         // when the popup window is visilbe
 489         else if ( (m_btnState & wxCONTROL_PRESSED) ||
 490                   (useVistaComboBox && !IsPopupWindowState(Hidden)) )
 491         {
 492             butState = CBXS_PRESSED;
 493         }
 494         else if ( m_btnState & wxCONTROL_CURRENT )
 495         {
 496             butState = CBXS_HOT;
 497         }
 498         else
 499         {
 500             butState = CBXS_NORMAL;
 501         }
 502
 503         int comboBoxPart = 0;  // For XP, use the 'default' part
 504         RECT* rUseForBg = &rBorder;
 505
 506         bool drawFullButton = false;
 507         int bgState = butState;
 508         const bool isFocused = (FindFocus() == GetMainWindowOfCompositeControl()) ? true : false;
 509
 510         if ( useVistaComboBox )
 511         {
 512             // Draw the entire control as a single button?
 513             if ( !isNonStdButton )
 514             {
 515                 if ( HasFlag(wxCB_READONLY) )
 516                     drawFullButton = true;
 517             }
 518
 519             if ( drawFullButton )
 520             {
 521                 comboBoxPart = CP_READONLY;
 522                 rUseForBg = &rFull;
 523
 524                 // It should be safe enough to update this flag here.
 525                 m_iFlags |= wxCC_FULL_BUTTON;
 526             }
 527             else
 528             {
 529                 comboBoxPart = CP_BORDER;
 530                 m_iFlags &= ~wxCC_FULL_BUTTON;
 531
 532                 if ( isFocused )
 533                     bgState = CBB_FOCUSED;
 534                 else
 535                     bgState = CBB_NORMAL;
 536             }
 537         }
 538
 539         //
 540         // Draw parent's background, if necessary
 541         RECT* rUseForTb = NULL;
 542
 543         if ( theme->IsThemeBackgroundPartiallyTransparent( hTheme, comboBoxPart, bgState ) )
 544             rUseForTb = &rFull;
 545         else if ( m_iFlags & wxCC_IFLAG_BUTTON_OUTSIDE )
 546             rUseForTb = &rButton;
 547
 548         if ( rUseForTb )
 549             theme->DrawThemeParentBackground( hWnd, hDc, rUseForTb );
 550
 551         //
 552         // Draw the control background (including the border)
 553         if ( m_widthCustomBorder > 0 )
 554         {
 555             theme->DrawThemeBackground( hTheme, hDc, comboBoxPart, bgState, rUseForBg, NULL );
 556         }
 557         else
 558         {
 559             // No border. We can't use theme, since it cannot be relied on
 560             // to deliver borderless drawing, even with DrawThemeBackgroundEx.
 561             dc.SetBrush(bgCol);
 562             dc.SetPen(bgCol);
 563             dc.DrawRectangle(borderRect);
 564         }
 565
 566         //
 567         // Draw the drop-button
 568         if ( !isNonStdButton )
 569         {
 570             drawButFlags = Button_BitmapOnly;
 571
 572             int butPart = CP_DROPDOWNBUTTON;
 573
 574             if ( useVistaComboBox )
 575             {
 576                 if ( drawFullButton )
 577                 {
 578                     // We need to alter the button style slightly before
 579                     // drawing the actual button (but it was good above
 580                     // when background etc was done).
 581                     if ( butState == CBXS_HOT || butState == CBXS_PRESSED )
 582                         butState = CBXS_NORMAL;
 583                 }
 584
 585                 if ( m_btnSide == wxRIGHT )
 586                     butPart = CP_DROPDOWNBUTTONRIGHT;
 587                 else
 588                     butPart = CP_DROPDOWNBUTTONLEFT;
 589
 590             }
 591             theme->DrawThemeBackground( hTheme, hDc, butPart, butState, &rButton, NULL );
 592         }
 593         else if ( useVistaComboBox &&
 594                   (m_iFlags & wxCC_IFLAG_BUTTON_OUTSIDE) )
 595         {
 596             // We'll do this, because DrawThemeParentBackground
 597             // doesn't seem to be reliable on Vista.
 598             drawButFlags |= Button_PaintBackground;
 599         }
 600     }
 601     else
 602 #endif
 603     {
 604         // Windows 2000 and earlier
 605         drawButFlags = Button_PaintBackground;
 606
 607         dc.SetBrush(bgCol);
 608         dc.SetPen(bgCol);
 609         dc.DrawRectangle(borderRect);
 610     }
 611
 612     // Button rendering (may only do the bitmap on button, depending on the flags)
 613     DrawButton( dc, rectButton, drawButFlags );
 614
 615     // Paint required portion of the custom image on the control
 616     if ( (!m_text || m_widthCustomPaint) )
 617     {
 618         wxASSERT( m_widthCustomPaint >= 0 );
 619
 620         // this is intentionally here to allow drawed rectangle's
 621         // right edge to be hidden
 622         if ( m_text )
 623             rectTextField.width = m_widthCustomPaint;
 624
 625         dc.SetFont( GetFont() );
 626
 627         dc.SetClippingRegion(rectTextField);
 628         if ( m_popupInterface )
 629             m_popupInterface->PaintComboControl(dc,rectTextField);
 630         else
 631             wxComboPopup::DefaultPaintComboControl(this,dc,rectTextField);
 632     }
 633
 634     delete dcPtr;
 635 }
 636
 637 void wxComboCtrl::OnMouseEvent( wxMouseEvent& event )
 638 {
 639     int mx = event.m_x;
 640     bool isOnButtonArea = m_btnArea.Contains(mx,event.m_y);
 641     int handlerFlags = isOnButtonArea ? wxCC_MF_ON_BUTTON : 0;
 642
 643     if ( PreprocessMouseEvent(event,isOnButtonArea) )
 644         return;
 645
 646     if ( (m_windowStyle & (wxCC_SPECIAL_DCLICK|wxCB_READONLY)) == wxCB_READONLY )
 647     {
 648         // if no textctrl and no special double-click, then the entire control acts
 649         // as a button
 650         handlerFlags |= wxCC_MF_ON_BUTTON;
 651         if ( HandleButtonMouseEvent(event,handlerFlags) )
 652             return;
 653     }
 654     else
 655     {
 656         if ( isOnButtonArea || HasCapture() ||
 657              (m_widthCustomPaint && mx < (m_tcArea.x+m_widthCustomPaint)) )
 658         {
 659             handlerFlags |= wxCC_MF_ON_CLICK_AREA;
 660
 661             if ( HandleButtonMouseEvent(event,handlerFlags) )
 662                 return;
 663         }
 664         else if ( m_btnState )
 665         {
 666             // otherwise need to clear the hover status
 667             m_btnState = 0;
 668             RefreshRect(m_btnArea);
 669         }
 670     }
 671
 672     //
 673     // This will handle left_down and left_dclick events outside button in a Windows-like manner.
 674     // See header file for further information on this method.
 675     HandleNormalMouseEvent(event);
 676
 677 }
 678
 679 #if wxUSE_COMBOCTRL_POPUP_ANIMATION
 680 static wxUint32 GetUserPreferencesMask()
 681 {
 682     static wxUint32 userPreferencesMask = 0;
 683     static bool valueSet = false;
 684
 685     if ( valueSet )
 686         return userPreferencesMask;
 687
 688     wxRegKey* pKey = NULL;
 689     wxRegKey key1(wxRegKey::HKCU, wxT("Software\\Policies\\Microsoft\\Control Panel"));
 690     wxRegKey key2(wxRegKey::HKCU, wxT("Software\\Policies\\Microsoft\\Windows\\Control Panel"));
 691     wxRegKey key3(wxRegKey::HKCU, wxT("Control Panel\\Desktop"));
 692
 693     if ( key1.Exists() )
 694         pKey = &key1;
 695     else if ( key2.Exists() )
 696         pKey = &key2;
 697     else if ( key3.Exists() )
 698         pKey = &key3;
 699
 700     if ( pKey && pKey->Open(wxRegKey::Read) )
 701     {
 702         wxMemoryBuffer buf;
 703         if ( pKey->HasValue(wxT("UserPreferencesMask")) &&
 704              pKey->QueryValue(wxT("UserPreferencesMask"), buf) )
 705         {
 706             if ( buf.GetDataLen() >= 4 )
 707             {
 708                 wxUint32* p = (wxUint32*) buf.GetData();
 709                 userPreferencesMask = *p;
 710             }
 711         }
 712     }
 713
 714     valueSet = true;
 715
 716     return userPreferencesMask;
 717 }
 718 #endif
 719
 720 #if wxUSE_COMBOCTRL_POPUP_ANIMATION
 721 void wxComboCtrl::DoTimerEvent()
 722 {
 723     bool stopTimer = false;
 724
 725     wxWindow* win = GetPopupWindow();
 726     wxWindow* popup = GetPopupControl()->GetControl();
 727
 728     // Popup was hidden before it was fully shown?
 729     if ( IsPopupWindowState(Hidden) )
 730     {
 731         stopTimer = true;
 732     }
 733     else
 734     {
 735         wxLongLong t = ::wxGetLocalTimeMillis();
 736         const wxRect& rect = m_animRect;
 737
 738         int pos = (int) (t-m_animStart).GetLo();
 739         if ( pos < COMBOBOX_ANIMATION_DURATION )
 740         {
 741             int height = rect.height;
 742             //int h0 = rect.height;
 743             int h = (((pos*256)/COMBOBOX_ANIMATION_DURATION)*height)/256;
 744             int y = (height - h);
 745             if ( y < 0 )
 746                 y = 0;
 747
 748             if ( m_animFlags & ShowAbove )
 749             {
 750                 win->SetSize( rect.x, rect.y + height - h, rect.width, h );
 751             }
 752             else
 753             {
 754                 // Note that apparently Move() should be called after
 755                 // SetSize() to reduce (or even eliminate) animation garbage
 756                 win->SetSize( rect.x, rect.y, rect.width, h );
 757                 popup->Move( 0, -y );
 758             }
 759         }
 760         else
 761         {
 762             stopTimer = true;
 763         }
 764     }
 765
 766     if ( stopTimer )
 767     {
 768         m_animTimer.Stop();
 769         DoShowPopup( m_animRect, m_animFlags );
 770         popup->Move( 0, 0 );
 771
 772         // Do a one final refresh to clean up the rare cases of animation
 773         // garbage
 774         win->Refresh();
 775     }
 776 }
 777 #endif
 778
 779 #if wxUSE_COMBOCTRL_POPUP_ANIMATION
 780 bool wxComboCtrl::AnimateShow( const wxRect& rect, int flags )
 781 {
 782     if ( GetUserPreferencesMask() & wxMSW_DESKTOP_USERPREFERENCESMASK_COMBOBOXANIM )
 783     {
 784         m_animStart = ::wxGetLocalTimeMillis();
 785         m_animRect = rect;
 786         m_animFlags = flags;
 787
 788         wxWindow* win = GetPopupWindow();
 789         win->SetSize( rect.x, rect.y, rect.width, 0 );
 790         win->Show();
 791
 792         m_animTimer.SetOwner( this, wxID_ANY );
 793         m_animTimer.Start( COMBOBOX_ANIMATION_RESOLUTION, wxTIMER_CONTINUOUS );
 794
 795         DoTimerEvent();
 796
 797         return false;
 798     }
 799
 800     return true;
 801 }
 802 #endif
 803
 804 wxCoord wxComboCtrl::GetNativeTextIndent() const
 805 {
 806 #if wxUSE_UXTHEME
 807     if ( wxUxThemeEngine::GetIfActive() )
 808         return NATIVE_TEXT_INDENT_XP;
 809 #endif
 810     return NATIVE_TEXT_INDENT_CLASSIC;
 811 }
 812
 813 bool wxComboCtrl::IsKeyPopupToggle(const wxKeyEvent& event) const
 814 {
 815     const bool isPopupShown = IsPopupShown();
 816
 817     switch ( event.GetKeyCode() )
 818     {
 819         case WXK_F4:
 820             // F4 toggles the popup in the native comboboxes, so emulate them
 821             if ( !event.AltDown() )
 822                 return true;
 823             break;
 824
 825         case WXK_ESCAPE:
 826             if ( isPopupShown )
 827                 return true;
 828             break;
 829
 830         case WXK_DOWN:
 831         case WXK_UP:
 832         case WXK_NUMPAD_DOWN:
 833         case WXK_NUMPAD_UP:
 834             // Arrow keys (and mouse wheel) toggle the popup in the native
 835             // combo boxes
 836             if ( event.AltDown() )
 837                 return true;
 838             break;
 839     }
 840
 841     return false;
 842 }
 843
 844 #endif // wxUSE_COMBOCTRL