src/msw/statbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/statbox.cpp
   3 // Purpose:     wxStaticBox
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_STATBOX
  28
  29 #include "wx/statbox.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/app.h"
  33     #include "wx/dcclient.h"
  34     #include "wx/dcmemory.h"
  35     #include "wx/image.h"
  36 #endif
  37
  38 #include "wx/notebook.h"
  39 #include "wx/sysopt.h"
  40
  41 #include "wx/msw/uxtheme.h"
  42 #include "wx/msw/private.h"
  43 #include "wx/msw/missing.h"
  44 #include "wx/msw/dc.h"
  45
  46 // the values coincide with those in tmschema.h
  47 #define BP_GROUPBOX 4
  48
  49 #define GBS_NORMAL 1
  50
  51 #define TMT_FONT 210
  52
  53 // ----------------------------------------------------------------------------
  54 // wxWin macros
  55 // ----------------------------------------------------------------------------
  56
  57 // ============================================================================
  58 // implementation
  59 // ============================================================================
  60
  61 // ----------------------------------------------------------------------------
  62 // wxStaticBox
  63 // ----------------------------------------------------------------------------
  64
  65 bool wxStaticBox::Create(wxWindow *parent,
  66                          wxWindowID id,
  67                          const wxString& label,
  68                          const wxPoint& pos,
  69                          const wxSize& size,
  70                          long style,
  71                          const wxString& name)
  72 {
  73     if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
  74         return false;
  75
  76     if ( !MSWCreateControl(wxT("BUTTON"), label, pos, size) )
  77         return false;
  78
  79     // Always use LTR layout. Otherwise, the label would be mirrored.
  80     SetLayoutDirection(wxLayout_LeftToRight);
  81
  82 #ifndef __WXWINCE__
  83     if (!wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
  84         Connect(wxEVT_PAINT, wxPaintEventHandler(wxStaticBox::OnPaint));
  85 #endif // !__WXWINCE__
  86
  87     return true;
  88 }
  89
  90 WXDWORD wxStaticBox::MSWGetStyle(long style, WXDWORD *exstyle) const
  91 {
  92     long styleWin = wxStaticBoxBase::MSWGetStyle(style, exstyle);
  93
  94     // no need for it anymore, must be removed for wxRadioBox child
  95     // buttons to be able to repaint themselves
  96     styleWin &= ~WS_CLIPCHILDREN;
  97
  98     if ( exstyle )
  99     {
 100 #ifndef __WXWINCE__
 101         if (wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
 102             *exstyle = WS_EX_TRANSPARENT;
 103         else
 104 #endif
 105             *exstyle = 0;
 106     }
 107
 108     styleWin |= BS_GROUPBOX;
 109
 110     if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
 111     {
 112         // Make sure label is on the right
 113         styleWin |= BS_RIGHT;
 114     }
 115
 116     return styleWin;
 117 }
 118
 119 wxSize wxStaticBox::DoGetBestSize() const
 120 {
 121     int cx, cy;
 122     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
 123
 124     int wBox;
 125     GetTextExtent(GetLabelText(wxGetWindowText(m_hWnd)), &wBox, &cy);
 126
 127     wBox += 3*cx;
 128     int hBox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 129
 130     wxSize best(wBox, hBox);
 131     CacheBestSize(best);
 132     return best;
 133 }
 134
 135 void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const
 136 {
 137     wxStaticBoxBase::GetBordersForSizer(borderTop, borderOther);
 138
 139     // need extra space, don't know how much but this seems to be enough
 140     *borderTop += GetCharHeight()/3;
 141 }
 142
 143 // all the hacks below are not necessary for WinCE
 144 #ifndef __WXWINCE__
 145
 146 WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 147 {
 148     if ( nMsg == WM_NCHITTEST )
 149     {
 150         // This code breaks some other processing such as enter/leave tracking
 151         // so it's off by default.
 152
 153         static int s_useHTClient = -1;
 154         if (s_useHTClient == -1)
 155             s_useHTClient = wxSystemOptions::GetOptionInt(wxT("msw.staticbox.htclient"));
 156         if (s_useHTClient == 1)
 157         {
 158             int xPos = GET_X_LPARAM(lParam);
 159             int yPos = GET_Y_LPARAM(lParam);
 160
 161             ScreenToClient(&xPos, &yPos);
 162
 163             // Make sure you can drag by the top of the groupbox, but let
 164             // other (enclosed) controls get mouse events also
 165             if ( yPos < 10 )
 166                 return (long)HTCLIENT;
 167         }
 168     }
 169
 170     if ( nMsg == WM_PRINTCLIENT )
 171     {
 172         // we have to process WM_PRINTCLIENT ourselves as otherwise child
 173         // windows' background (eg buttons in radio box) would never be drawn
 174         // unless we have a parent with non default background
 175
 176         // so check first if we have one
 177         if ( !HandlePrintClient((WXHDC)wParam) )
 178         {
 179             // no, we don't, erase the background ourselves
 180             // (don't use our own) - see PaintBackground for explanation
 181             wxBrush brush(GetParent()->GetBackgroundColour());
 182             wxFillRect(GetHwnd(), (HDC)wParam, GetHbrushOf(brush));
 183         }
 184
 185         return 0;
 186     }
 187
 188     if ( nMsg == WM_UPDATEUISTATE )
 189     {
 190         // DefWindowProc() redraws just the static box text when it gets this
 191         // message and it does it using the standard (blue in standard theme)
 192         // colour and not our own label colour that we use in PaintForeground()
 193         // resulting in the label mysteriously changing the colour when e.g.
 194         // "Alt" is pressed anywhere in the window, see #12497.
 195         //
 196         // To avoid this we simply refresh the window forcing our own code
 197         // redrawing the label in the correct colour to be called. This is
 198         // inefficient but there doesn't seem to be anything else we can do.
 199         //
 200         // Notice that the problem is XP-specific and doesn't arise under later
 201         // systems.
 202         if ( m_hasFgCol && wxGetWinVersion() == wxWinVersion_XP )
 203             Refresh();
 204     }
 205
 206     return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 207 }
 208
 209 // ----------------------------------------------------------------------------
 210 // static box drawing
 211 // ----------------------------------------------------------------------------
 212
 213 /*
 214    We draw the static box ourselves because it's the only way to prevent it
 215    from flickering horribly on resize (because everything inside the box is
 216    erased twice: once when the box itself is repainted and second time when
 217    the control inside it is repainted) without using WS_EX_TRANSPARENT style as
 218    we used to do and which resulted in other problems.
 219  */
 220
 221 // MSWGetRegionWithoutSelf helper: removes the given rectangle from region
 222 static inline void
 223 SubtractRectFromRgn(HRGN hrgn, int left, int top, int right, int bottom)
 224 {
 225     AutoHRGN hrgnRect(::CreateRectRgn(left, top, right, bottom));
 226     if ( !hrgnRect )
 227     {
 228         wxLogLastError(wxT("CreateRectRgn()"));
 229         return;
 230     }
 231
 232     ::CombineRgn(hrgn, hrgn, hrgnRect, RGN_DIFF);
 233 }
 234
 235 void wxStaticBox::MSWGetRegionWithoutSelf(WXHRGN hRgn, int w, int h)
 236 {
 237     HRGN hrgn = (HRGN)hRgn;
 238
 239     // remove the area occupied by the static box borders from the region
 240     int borderTop, border;
 241     GetBordersForSizer(&borderTop, &border);
 242
 243     // top
 244     SubtractRectFromRgn(hrgn, 0, 0, w, borderTop);
 245
 246     // bottom
 247     SubtractRectFromRgn(hrgn, 0, h - border, w, h);
 248
 249     // left
 250     SubtractRectFromRgn(hrgn, 0, 0, border, h);
 251
 252     // right
 253     SubtractRectFromRgn(hrgn, w - border, 0, w, h);
 254 }
 255
 256 WXHRGN wxStaticBox::MSWGetRegionWithoutChildren()
 257 {
 258     RECT rc;
 259     ::GetWindowRect(GetHwnd(), &rc);
 260     HRGN hrgn = ::CreateRectRgn(rc.left, rc.top, rc.right + 1, rc.bottom + 1);
 261     bool foundThis = false;
 262
 263     // iterate over all child windows (not just wxWindows but all windows)
 264     for ( HWND child = ::GetWindow(GetHwndOf(GetParent()), GW_CHILD);
 265           child;
 266           child = ::GetWindow(child, GW_HWNDNEXT) )
 267     {
 268         if ( ! ::IsWindowVisible(child) )
 269         {
 270             // if the window isn't visible then it doesn't need clipped
 271             continue;
 272         }
 273
 274         LONG style = ::GetWindowLong(child, GWL_STYLE);
 275         wxString str(wxGetWindowClass(child));
 276         str.UpperCase();
 277         if ( str == wxT("BUTTON") && (style & BS_GROUPBOX) == BS_GROUPBOX )
 278         {
 279             if ( child == GetHwnd() )
 280                 foundThis = true;
 281
 282             // Any static boxes below this one in the Z-order can't be clipped
 283             // since if we have the case where a static box with a low Z-order
 284             // is nested inside another static box with a high Z-order then the
 285             // nested static box would be painted over. Doing it this way
 286             // unfortunately results in flicker if the Z-order of nested static
 287             // boxes is not inside (lowest) to outside (highest) but at least
 288             // they are still shown.
 289             if ( foundThis )
 290                 continue;
 291         }
 292
 293         ::GetWindowRect(child, &rc);
 294         if ( ::RectInRegion(hrgn, &rc) )
 295         {
 296             // need to remove WS_CLIPSIBLINGS from all sibling windows
 297             // that are within this staticbox if set
 298             if ( style & WS_CLIPSIBLINGS )
 299             {
 300                 style &= ~WS_CLIPSIBLINGS;
 301                 ::SetWindowLong(child, GWL_STYLE, style);
 302
 303                 // MSDN: "If you have changed certain window data using
 304                 // SetWindowLong, you must call SetWindowPos to have the
 305                 // changes take effect."
 306                 ::SetWindowPos(child, NULL, 0, 0, 0, 0,
 307                                SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
 308                                SWP_FRAMECHANGED);
 309             }
 310
 311             AutoHRGN hrgnChild(::CreateRectRgnIndirect(&rc));
 312             ::CombineRgn(hrgn, hrgn, hrgnChild, RGN_DIFF);
 313         }
 314     }
 315
 316     return (WXHRGN)hrgn;
 317 }
 318
 319 // helper for OnPaint(): really erase the background, i.e. do it even if we
 320 // don't have any non default brush for doing it (DoEraseBackground() doesn't
 321 // do anything in such case)
 322 void wxStaticBox::PaintBackground(wxDC& dc, const RECT& rc)
 323 {
 324     // note that we do not use the box background colour here, it shouldn't
 325     // apply to its interior for several reasons:
 326     //  1. wxGTK doesn't do it
 327     //  2. controls inside the box don't get correct bg colour because they
 328     //     are not our children so we'd have some really ugly colour mix if
 329     //     we did it
 330     //  3. this is backwards compatible behaviour and some people rely on it,
 331     //     see http://groups.google.com/groups?selm=4252E932.3080801%40able.es
 332     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 333     HBRUSH hbr = MSWGetBgBrush(impl->GetHDC());
 334
 335     // if there is no special brush for painting this control, just use the
 336     // solid background colour
 337     wxBrush brush;
 338     if ( !hbr )
 339     {
 340         brush = wxBrush(GetParent()->GetBackgroundColour());
 341         hbr = GetHbrushOf(brush);
 342     }
 343
 344     ::FillRect(GetHdcOf(*impl), &rc, hbr);
 345 }
 346
 347 void wxStaticBox::PaintForeground(wxDC& dc, const RECT& rc)
 348 {
 349     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 350     MSWDefWindowProc(WM_PAINT, (WPARAM)GetHdcOf(*impl), 0);
 351
 352     // when using XP themes, neither setting the text colour nor transparent
 353     // background mode doesn't change anything: the static box def window proc
 354     // still draws the label in its own colours, so we need to redraw the text
 355     // ourselves if we have a non default fg colour
 356     if ( m_hasFgCol && wxUxThemeEngine::GetIfActive() )
 357     {
 358         // draw over the text in default colour in our colour
 359         HDC hdc = GetHdcOf(*impl);
 360         ::SetTextColor(hdc, GetForegroundColour().GetPixel());
 361
 362         const bool rtl = wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft;
 363         if ( rtl )
 364             ::SetTextAlign(hdc, TA_RTLREADING | TA_RIGHT);
 365
 366         // Get dimensions of the label
 367         const wxString label = GetLabel();
 368
 369         // choose the correct font
 370         AutoHFONT font;
 371         SelectInHDC selFont;
 372         if ( m_hasFont )
 373         {
 374             selFont.Init(hdc, GetHfontOf(GetFont()));
 375         }
 376         else // no font set, use the one set by the theme
 377         {
 378             wxUxThemeHandle hTheme(this, L"BUTTON");
 379             if ( hTheme )
 380             {
 381                 wxUxThemeFont themeFont;
 382                 if ( wxUxThemeEngine::Get()->GetThemeFont
 383                                              (
 384                                                 hTheme,
 385                                                 hdc,
 386                                                 BP_GROUPBOX,
 387                                                 GBS_NORMAL,
 388                                                 TMT_FONT,
 389                                                 themeFont.GetPtr()
 390                                              ) == S_OK )
 391                 {
 392                     font.Init(themeFont.GetLOGFONT());
 393                     if ( font )
 394                         selFont.Init(hdc, font);
 395                 }
 396             }
 397         }
 398
 399         // Get the font extent
 400         int width, height;
 401         dc.GetTextExtent(wxStripMenuCodes(label, wxStrip_Mnemonics),
 402                          &width, &height);
 403
 404         int x;
 405         int y = height;
 406
 407         // first we need to correctly paint the background of the label
 408         // as Windows ignores the brush offset when doing it
 409         //
 410         // FIXME: value of x is hardcoded as this is what it is on my system,
 411         //        no idea if it's true everywhere
 412         RECT dimensions = {0, 0, 0, y};
 413         if ( !rtl )
 414         {
 415             x = 9;
 416             dimensions.left = x;
 417             dimensions.right = x + width;
 418         }
 419         else
 420         {
 421             x = rc.right - 7;
 422             dimensions.left = x - width;
 423             dimensions.right = x;
 424         }
 425
 426         // need to adjust the rectangle to cover all the label background
 427         dimensions.left -= 2;
 428         dimensions.right += 2;
 429         dimensions.bottom += 2;
 430
 431         if ( UseBgCol() )
 432         {
 433             // our own background colour should be used for the background of
 434             // the label: this is consistent with the behaviour under pre-XP
 435             // systems (i.e. without visual themes) and generally makes sense
 436             wxBrush brush = wxBrush(GetBackgroundColour());
 437             wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 438             ::FillRect(GetHdcOf(*impl), &dimensions, GetHbrushOf(brush));
 439         }
 440         else // paint parent background
 441         {
 442             PaintBackground(dc, dimensions);
 443         }
 444
 445         UINT drawTextFlags = DT_SINGLELINE | DT_VCENTER;
 446
 447         // determine the state of UI queues to draw the text correctly under XP
 448         // and later systems
 449         static const bool isXPorLater = wxGetWinVersion() >= wxWinVersion_XP;
 450         if ( isXPorLater )
 451         {
 452             if ( ::SendMessage(GetHwnd(), WM_QUERYUISTATE, 0, 0) &
 453                     UISF_HIDEACCEL )
 454             {
 455                 drawTextFlags |= DT_HIDEPREFIX;
 456             }
 457         }
 458
 459         // now draw the text
 460         if ( !rtl )
 461         {
 462             RECT rc2 = { x, 0, x + width, y };
 463             ::DrawText(hdc, label.wx_str(), label.length(), &rc2,
 464                        drawTextFlags);
 465         }
 466         else // RTL
 467         {
 468             RECT rc2 = { x, 0, x - width, y };
 469             ::DrawText(hdc, label.wx_str(), label.length(), &rc2,
 470                        drawTextFlags | DT_RTLREADING);
 471         }
 472     }
 473 }
 474
 475 void wxStaticBox::OnPaint(wxPaintEvent& WXUNUSED(event))
 476 {
 477     RECT rc;
 478     ::GetClientRect(GetHwnd(), &rc);
 479
 480     // draw the entire box in a memory DC
 481     wxMemoryDC memdc;
 482     wxBitmap bitmap(rc.right, rc.bottom);
 483     memdc.SelectObject(bitmap);
 484
 485     PaintBackground(memdc, rc);
 486     PaintForeground(memdc, rc);
 487
 488     // now only blit the static box border itself, not the interior, to avoid
 489     // flicker when background is drawn below
 490     //
 491     // note that it seems to be faster to do 4 small blits here and then paint
 492     // directly into wxPaintDC than painting background in wxMemoryDC and then
 493     // blitting everything at once to wxPaintDC, this is why we do it like this
 494     wxPaintDC dc(this);
 495     int borderTop, border;
 496     GetBordersForSizer(&borderTop, &border);
 497
 498     // top
 499     dc.Blit(border, 0, rc.right - border, borderTop,
 500             &memdc, border, 0);
 501     // bottom
 502     dc.Blit(border, rc.bottom - border, rc.right - border, border,
 503             &memdc, border, rc.bottom - border);
 504     // left
 505     dc.Blit(0, 0, border, rc.bottom,
 506             &memdc, 0, 0);
 507     // right (note that upper and bottom right corners were already part of the
 508     // first two blits so we shouldn't overwrite them here to avoi flicker)
 509     dc.Blit(rc.right - border, borderTop,
 510             border, rc.bottom - borderTop - border,
 511             &memdc, rc.right - border, borderTop);
 512
 513
 514     // create the region excluding box children
 515     AutoHRGN hrgn((HRGN)MSWGetRegionWithoutChildren());
 516     RECT rcWin;
 517     ::GetWindowRect(GetHwnd(), &rcWin);
 518     ::OffsetRgn(hrgn, -rcWin.left, -rcWin.top);
 519
 520     // and also the box itself
 521     MSWGetRegionWithoutSelf((WXHRGN) hrgn, rc.right, rc.bottom);
 522     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 523     HDCClipper clipToBg(GetHdcOf(*impl), hrgn);
 524
 525     // paint the inside of the box (excluding box itself and child controls)
 526     PaintBackground(dc, rc);
 527 }
 528
 529 #endif // !__WXWINCE__
 530
 531 #endif // wxUSE_STATBOX