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     #include "wx/sizer.h"
  37 #endif
  38
  39 #include "wx/notebook.h"
  40 #include "wx/sysopt.h"
  41
  42 #include "wx/msw/uxtheme.h"
  43 #include "wx/msw/private.h"
  44 #include "wx/msw/missing.h"
  45 #include "wx/msw/dc.h"
  46
  47 // the values coincide with those in tmschema.h
  48 #define BP_GROUPBOX 4
  49
  50 #define GBS_NORMAL 1
  51
  52 #define TMT_FONT 210
  53
  54 // ----------------------------------------------------------------------------
  55 // wxWin macros
  56 // ----------------------------------------------------------------------------
  57
  58 // ============================================================================
  59 // implementation
  60 // ============================================================================
  61
  62 // ----------------------------------------------------------------------------
  63 // wxStaticBox
  64 // ----------------------------------------------------------------------------
  65
  66 bool wxStaticBox::Create(wxWindow *parent,
  67                          wxWindowID id,
  68                          const wxString& label,
  69                          const wxPoint& pos,
  70                          const wxSize& size,
  71                          long style,
  72                          const wxString& name)
  73 {
  74     if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
  75         return false;
  76
  77     if ( !MSWCreateControl(wxT("BUTTON"), label, pos, size) )
  78         return false;
  79
  80     // Always use LTR layout. Otherwise, the label would be mirrored.
  81     SetLayoutDirection(wxLayout_LeftToRight);
  82
  83 #ifndef __WXWINCE__
  84     if (!wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
  85         Connect(wxEVT_PAINT, wxPaintEventHandler(wxStaticBox::OnPaint));
  86 #endif // !__WXWINCE__
  87
  88     return true;
  89 }
  90
  91 WXDWORD wxStaticBox::MSWGetStyle(long style, WXDWORD *exstyle) const
  92 {
  93     long styleWin = wxStaticBoxBase::MSWGetStyle(style, exstyle);
  94
  95     // no need for it anymore, must be removed for wxRadioBox child
  96     // buttons to be able to repaint themselves
  97     styleWin &= ~WS_CLIPCHILDREN;
  98
  99     if ( exstyle )
 100     {
 101 #ifndef __WXWINCE__
 102         if (wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
 103             *exstyle = WS_EX_TRANSPARENT;
 104         else
 105 #endif
 106             *exstyle = 0;
 107     }
 108
 109     styleWin |= BS_GROUPBOX;
 110
 111     if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
 112     {
 113         // Make sure label is on the right
 114         styleWin |= BS_RIGHT;
 115     }
 116
 117     return styleWin;
 118 }
 119
 120 wxSize wxStaticBox::DoGetBestSize() const
 121 {
 122     wxSize best;
 123
 124     // Calculate the size needed by the label
 125     int cx, cy;
 126     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
 127
 128     int wBox;
 129     GetTextExtent(GetLabelText(wxGetWindowText(m_hWnd)), &wBox, &cy);
 130
 131     wBox += 3*cx;
 132     int hBox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 133
 134     // If there is a sizer then the base best size is the sizer's minimum
 135     if (GetSizer() != NULL)
 136     {
 137         wxSize cm(GetSizer()->CalcMin());
 138         best = ClientToWindowSize(cm);
 139         // adjust for a long label if needed
 140         best.x = wxMax(best.x, wBox);
 141     }
 142     // otherwise the best size falls back to the label size
 143     else
 144     {
 145         best = wxSize(wBox, hBox);
 146     }
 147     return best;
 148 }
 149
 150 void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const
 151 {
 152     wxStaticBoxBase::GetBordersForSizer(borderTop, borderOther);
 153
 154     // need extra space, don't know how much but this seems to be enough
 155     *borderTop += GetCharHeight()/3;
 156 }
 157
 158 // all the hacks below are not necessary for WinCE
 159 #ifndef __WXWINCE__
 160
 161 WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 162 {
 163     if ( nMsg == WM_NCHITTEST )
 164     {
 165         // This code breaks some other processing such as enter/leave tracking
 166         // so it's off by default.
 167
 168         static int s_useHTClient = -1;
 169         if (s_useHTClient == -1)
 170             s_useHTClient = wxSystemOptions::GetOptionInt(wxT("msw.staticbox.htclient"));
 171         if (s_useHTClient == 1)
 172         {
 173             int xPos = GET_X_LPARAM(lParam);
 174             int yPos = GET_Y_LPARAM(lParam);
 175
 176             ScreenToClient(&xPos, &yPos);
 177
 178             // Make sure you can drag by the top of the groupbox, but let
 179             // other (enclosed) controls get mouse events also
 180             if ( yPos < 10 )
 181                 return (long)HTCLIENT;
 182         }
 183     }
 184
 185     if ( nMsg == WM_PRINTCLIENT )
 186     {
 187         // we have to process WM_PRINTCLIENT ourselves as otherwise child
 188         // windows' background (eg buttons in radio box) would never be drawn
 189         // unless we have a parent with non default background
 190
 191         // so check first if we have one
 192         if ( !HandlePrintClient((WXHDC)wParam) )
 193         {
 194             // no, we don't, erase the background ourselves
 195             // (don't use our own) - see PaintBackground for explanation
 196             wxBrush brush(GetParent()->GetBackgroundColour());
 197             wxFillRect(GetHwnd(), (HDC)wParam, GetHbrushOf(brush));
 198         }
 199
 200         return 0;
 201     }
 202
 203     if ( nMsg == WM_UPDATEUISTATE )
 204     {
 205         // DefWindowProc() redraws just the static box text when it gets this
 206         // message and it does it using the standard (blue in standard theme)
 207         // colour and not our own label colour that we use in PaintForeground()
 208         // resulting in the label mysteriously changing the colour when e.g.
 209         // "Alt" is pressed anywhere in the window, see #12497.
 210         //
 211         // To avoid this we simply refresh the window forcing our own code
 212         // redrawing the label in the correct colour to be called. This is
 213         // inefficient but there doesn't seem to be anything else we can do.
 214         //
 215         // Notice that the problem is XP-specific and doesn't arise under later
 216         // systems.
 217         if ( m_hasFgCol && wxGetWinVersion() == wxWinVersion_XP )
 218             Refresh();
 219     }
 220
 221     return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 222 }
 223
 224 // ----------------------------------------------------------------------------
 225 // static box drawing
 226 // ----------------------------------------------------------------------------
 227
 228 /*
 229    We draw the static box ourselves because it's the only way to prevent it
 230    from flickering horribly on resize (because everything inside the box is
 231    erased twice: once when the box itself is repainted and second time when
 232    the control inside it is repainted) without using WS_EX_TRANSPARENT style as
 233    we used to do and which resulted in other problems.
 234  */
 235
 236 // MSWGetRegionWithoutSelf helper: removes the given rectangle from region
 237 static inline void
 238 SubtractRectFromRgn(HRGN hrgn, int left, int top, int right, int bottom)
 239 {
 240     AutoHRGN hrgnRect(::CreateRectRgn(left, top, right, bottom));
 241     if ( !hrgnRect )
 242     {
 243         wxLogLastError(wxT("CreateRectRgn()"));
 244         return;
 245     }
 246
 247     ::CombineRgn(hrgn, hrgn, hrgnRect, RGN_DIFF);
 248 }
 249
 250 void wxStaticBox::MSWGetRegionWithoutSelf(WXHRGN hRgn, int w, int h)
 251 {
 252     HRGN hrgn = (HRGN)hRgn;
 253
 254     // remove the area occupied by the static box borders from the region
 255     int borderTop, border;
 256     GetBordersForSizer(&borderTop, &border);
 257
 258     // top
 259     SubtractRectFromRgn(hrgn, 0, 0, w, borderTop);
 260
 261     // bottom
 262     SubtractRectFromRgn(hrgn, 0, h - border, w, h);
 263
 264     // left
 265     SubtractRectFromRgn(hrgn, 0, 0, border, h);
 266
 267     // right
 268     SubtractRectFromRgn(hrgn, w - border, 0, w, h);
 269 }
 270
 271 WXHRGN wxStaticBox::MSWGetRegionWithoutChildren()
 272 {
 273     RECT rc;
 274     ::GetWindowRect(GetHwnd(), &rc);
 275     HRGN hrgn = ::CreateRectRgn(rc.left, rc.top, rc.right + 1, rc.bottom + 1);
 276     bool foundThis = false;
 277
 278     // iterate over all child windows (not just wxWindows but all windows)
 279     for ( HWND child = ::GetWindow(GetHwndOf(GetParent()), GW_CHILD);
 280           child;
 281           child = ::GetWindow(child, GW_HWNDNEXT) )
 282     {
 283         if ( ! ::IsWindowVisible(child) )
 284         {
 285             // if the window isn't visible then it doesn't need clipped
 286             continue;
 287         }
 288
 289         LONG style = ::GetWindowLong(child, GWL_STYLE);
 290         wxString str(wxGetWindowClass(child));
 291         str.UpperCase();
 292         if ( str == wxT("BUTTON") && (style & BS_GROUPBOX) == BS_GROUPBOX )
 293         {
 294             if ( child == GetHwnd() )
 295                 foundThis = true;
 296
 297             // Any static boxes below this one in the Z-order can't be clipped
 298             // since if we have the case where a static box with a low Z-order
 299             // is nested inside another static box with a high Z-order then the
 300             // nested static box would be painted over. Doing it this way
 301             // unfortunately results in flicker if the Z-order of nested static
 302             // boxes is not inside (lowest) to outside (highest) but at least
 303             // they are still shown.
 304             if ( foundThis )
 305                 continue;
 306         }
 307
 308         ::GetWindowRect(child, &rc);
 309         if ( ::RectInRegion(hrgn, &rc) )
 310         {
 311             // need to remove WS_CLIPSIBLINGS from all sibling windows
 312             // that are within this staticbox if set
 313             if ( style & WS_CLIPSIBLINGS )
 314             {
 315                 style &= ~WS_CLIPSIBLINGS;
 316                 ::SetWindowLong(child, GWL_STYLE, style);
 317
 318                 // MSDN: "If you have changed certain window data using
 319                 // SetWindowLong, you must call SetWindowPos to have the
 320                 // changes take effect."
 321                 ::SetWindowPos(child, NULL, 0, 0, 0, 0,
 322                                SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
 323                                SWP_FRAMECHANGED);
 324             }
 325
 326             AutoHRGN hrgnChild(::CreateRectRgnIndirect(&rc));
 327             ::CombineRgn(hrgn, hrgn, hrgnChild, RGN_DIFF);
 328         }
 329     }
 330
 331     return (WXHRGN)hrgn;
 332 }
 333
 334 // helper for OnPaint(): really erase the background, i.e. do it even if we
 335 // don't have any non default brush for doing it (DoEraseBackground() doesn't
 336 // do anything in such case)
 337 void wxStaticBox::PaintBackground(wxDC& dc, const RECT& rc)
 338 {
 339     // note that we do not use the box background colour here, it shouldn't
 340     // apply to its interior for several reasons:
 341     //  1. wxGTK doesn't do it
 342     //  2. controls inside the box don't get correct bg colour because they
 343     //     are not our children so we'd have some really ugly colour mix if
 344     //     we did it
 345     //  3. this is backwards compatible behaviour and some people rely on it,
 346     //     see http://groups.google.com/groups?selm=4252E932.3080801%40able.es
 347     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 348     HBRUSH hbr = MSWGetBgBrush(impl->GetHDC());
 349
 350     // if there is no special brush for painting this control, just use the
 351     // solid background colour
 352     wxBrush brush;
 353     if ( !hbr )
 354     {
 355         brush = wxBrush(GetParent()->GetBackgroundColour());
 356         hbr = GetHbrushOf(brush);
 357     }
 358
 359     ::FillRect(GetHdcOf(*impl), &rc, hbr);
 360 }
 361
 362 void wxStaticBox::PaintForeground(wxDC& dc, const RECT& rc)
 363 {
 364     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 365     MSWDefWindowProc(WM_PAINT, (WPARAM)GetHdcOf(*impl), 0);
 366
 367 #if wxUSE_UXTHEME
 368     // when using XP themes, neither setting the text colour nor transparent
 369     // background mode doesn't change anything: the static box def window proc
 370     // still draws the label in its own colours, so we need to redraw the text
 371     // ourselves if we have a non default fg colour
 372     if ( m_hasFgCol && wxUxThemeEngine::GetIfActive() )
 373     {
 374         // draw over the text in default colour in our colour
 375         HDC hdc = GetHdcOf(*impl);
 376         ::SetTextColor(hdc, GetForegroundColour().GetPixel());
 377
 378         const bool rtl = wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft;
 379         if ( rtl )
 380             ::SetTextAlign(hdc, TA_RTLREADING | TA_RIGHT);
 381
 382         // Get dimensions of the label
 383         const wxString label = GetLabel();
 384
 385         // choose the correct font
 386         AutoHFONT font;
 387         SelectInHDC selFont;
 388         if ( m_hasFont )
 389         {
 390             selFont.Init(hdc, GetHfontOf(GetFont()));
 391         }
 392         else // no font set, use the one set by the theme
 393         {
 394             wxUxThemeHandle hTheme(this, L"BUTTON");
 395             if ( hTheme )
 396             {
 397                 wxUxThemeFont themeFont;
 398                 if ( wxUxThemeEngine::Get()->GetThemeFont
 399                                              (
 400                                                 hTheme,
 401                                                 hdc,
 402                                                 BP_GROUPBOX,
 403                                                 GBS_NORMAL,
 404                                                 TMT_FONT,
 405                                                 themeFont.GetPtr()
 406                                              ) == S_OK )
 407                 {
 408                     font.Init(themeFont.GetLOGFONT());
 409                     if ( font )
 410                         selFont.Init(hdc, font);
 411                 }
 412             }
 413         }
 414
 415         // Get the font extent
 416         int width, height;
 417         dc.GetTextExtent(wxStripMenuCodes(label, wxStrip_Mnemonics),
 418                          &width, &height);
 419
 420         int x;
 421         int y = height;
 422
 423         // first we need to correctly paint the background of the label
 424         // as Windows ignores the brush offset when doing it
 425         //
 426         // FIXME: value of x is hardcoded as this is what it is on my system,
 427         //        no idea if it's true everywhere
 428         RECT dimensions = {0, 0, 0, y};
 429         if ( !rtl )
 430         {
 431             x = 9;
 432             dimensions.left = x;
 433             dimensions.right = x + width;
 434         }
 435         else
 436         {
 437             x = rc.right - 7;
 438             dimensions.left = x - width;
 439             dimensions.right = x;
 440         }
 441
 442         // need to adjust the rectangle to cover all the label background
 443         dimensions.left -= 2;
 444         dimensions.right += 2;
 445         dimensions.bottom += 2;
 446
 447         if ( UseBgCol() )
 448         {
 449             // our own background colour should be used for the background of
 450             // the label: this is consistent with the behaviour under pre-XP
 451             // systems (i.e. without visual themes) and generally makes sense
 452             wxBrush brush = wxBrush(GetBackgroundColour());
 453             wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 454             ::FillRect(GetHdcOf(*impl), &dimensions, GetHbrushOf(brush));
 455         }
 456         else // paint parent background
 457         {
 458             PaintBackground(dc, dimensions);
 459         }
 460
 461         UINT drawTextFlags = DT_SINGLELINE | DT_VCENTER;
 462
 463         // determine the state of UI queues to draw the text correctly under XP
 464         // and later systems
 465         static const bool isXPorLater = wxGetWinVersion() >= wxWinVersion_XP;
 466         if ( isXPorLater )
 467         {
 468             if ( ::SendMessage(GetHwnd(), WM_QUERYUISTATE, 0, 0) &
 469                     UISF_HIDEACCEL )
 470             {
 471                 drawTextFlags |= DT_HIDEPREFIX;
 472             }
 473         }
 474
 475         // now draw the text
 476         if ( !rtl )
 477         {
 478             RECT rc2 = { x, 0, x + width, y };
 479             ::DrawText(hdc, label.t_str(), label.length(), &rc2,
 480                        drawTextFlags);
 481         }
 482         else // RTL
 483         {
 484             RECT rc2 = { x, 0, x - width, y };
 485             ::DrawText(hdc, label.t_str(), label.length(), &rc2,
 486                        drawTextFlags | DT_RTLREADING);
 487         }
 488     }
 489 #endif // wxUSE_UXTHEME
 490 }
 491
 492 void wxStaticBox::OnPaint(wxPaintEvent& WXUNUSED(event))
 493 {
 494     RECT rc;
 495     ::GetClientRect(GetHwnd(), &rc);
 496
 497     // draw the entire box in a memory DC
 498     wxMemoryDC memdc;
 499     wxBitmap bitmap(rc.right, rc.bottom);
 500     memdc.SelectObject(bitmap);
 501
 502     PaintBackground(memdc, rc);
 503     PaintForeground(memdc, rc);
 504
 505     // now only blit the static box border itself, not the interior, to avoid
 506     // flicker when background is drawn below
 507     //
 508     // note that it seems to be faster to do 4 small blits here and then paint
 509     // directly into wxPaintDC than painting background in wxMemoryDC and then
 510     // blitting everything at once to wxPaintDC, this is why we do it like this
 511     wxPaintDC dc(this);
 512     int borderTop, border;
 513     GetBordersForSizer(&borderTop, &border);
 514
 515     // top
 516     dc.Blit(border, 0, rc.right - border, borderTop,
 517             &memdc, border, 0);
 518     // bottom
 519     dc.Blit(border, rc.bottom - border, rc.right - border, border,
 520             &memdc, border, rc.bottom - border);
 521     // left
 522     dc.Blit(0, 0, border, rc.bottom,
 523             &memdc, 0, 0);
 524     // right (note that upper and bottom right corners were already part of the
 525     // first two blits so we shouldn't overwrite them here to avoi flicker)
 526     dc.Blit(rc.right - border, borderTop,
 527             border, rc.bottom - borderTop - border,
 528             &memdc, rc.right - border, borderTop);
 529
 530
 531     // create the region excluding box children
 532     AutoHRGN hrgn((HRGN)MSWGetRegionWithoutChildren());
 533     RECT rcWin;
 534     ::GetWindowRect(GetHwnd(), &rcWin);
 535     ::OffsetRgn(hrgn, -rcWin.left, -rcWin.top);
 536
 537     // and also the box itself
 538     MSWGetRegionWithoutSelf((WXHRGN) hrgn, rc.right, rc.bottom);
 539     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 540     HDCClipper clipToBg(GetHdcOf(*impl), hrgn);
 541
 542     // paint the inside of the box (excluding box itself and child controls)
 543     PaintBackground(dc, rc);
 544 }
 545
 546 #endif // !__WXWINCE__
 547
 548 #endif // wxUSE_STATBOX