src/msw/statbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "statbox.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_STATBOX
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/app.h"
  35     #include "wx/dcclient.h"
  36 #endif
  37
  38 #include "wx/statbox.h"
  39 #include "wx/notebook.h"
  40 #include "wx/sysopt.h"
  41 #include "wx/image.h"
  42 #include "wx/dcmemory.h"
  43 #include "wx/sysopt.h"
  44
  45 #include "wx/msw/private.h"
  46 #include "wx/msw/missing.h"
  47
  48 // ----------------------------------------------------------------------------
  49 // wxWin macros
  50 // ----------------------------------------------------------------------------
  51
  52 #if wxUSE_EXTENDED_RTTI
  53 WX_DEFINE_FLAGS( wxStaticBoxStyle )
  54
  55 wxBEGIN_FLAGS( wxStaticBoxStyle )
  56     // new style border flags, we put them first to
  57     // use them for streaming out
  58     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  59     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  60     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  61     wxFLAGS_MEMBER(wxBORDER_RAISED)
  62     wxFLAGS_MEMBER(wxBORDER_STATIC)
  63     wxFLAGS_MEMBER(wxBORDER_NONE)
  64
  65     // old style border flags
  66     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  67     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  68     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  69     wxFLAGS_MEMBER(wxRAISED_BORDER)
  70     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  71     wxFLAGS_MEMBER(wxBORDER)
  72
  73     // standard window styles
  74     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  75     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  76     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  77     wxFLAGS_MEMBER(wxWANTS_CHARS)
  78     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  79     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  80     wxFLAGS_MEMBER(wxVSCROLL)
  81     wxFLAGS_MEMBER(wxHSCROLL)
  82
  83 wxEND_FLAGS( wxStaticBoxStyle )
  84
  85 IMPLEMENT_DYNAMIC_CLASS_XTI(wxStaticBox, wxControl,"wx/statbox.h")
  86
  87 wxBEGIN_PROPERTIES_TABLE(wxStaticBox)
  88     wxPROPERTY( Label,wxString, SetLabel, GetLabel, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
  89     wxPROPERTY_FLAGS( WindowStyle , wxStaticBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
  90 /*
  91     TODO PROPERTIES :
  92         label
  93 */
  94 wxEND_PROPERTIES_TABLE()
  95
  96 wxBEGIN_HANDLERS_TABLE(wxStaticBox)
  97 wxEND_HANDLERS_TABLE()
  98
  99 wxCONSTRUCTOR_6( wxStaticBox , wxWindow* , Parent , wxWindowID , Id , wxString , Label , wxPoint , Position , wxSize , Size , long , WindowStyle )
 100 #else
 101 IMPLEMENT_DYNAMIC_CLASS(wxStaticBox, wxControl)
 102 #endif
 103
 104 // ============================================================================
 105 // implementation
 106 // ============================================================================
 107
 108 // ----------------------------------------------------------------------------
 109 // wxStaticBox
 110 // ----------------------------------------------------------------------------
 111
 112 bool wxStaticBox::Create(wxWindow *parent,
 113                          wxWindowID id,
 114                          const wxString& label,
 115                          const wxPoint& pos,
 116                          const wxSize& size,
 117                          long style,
 118                          const wxString& name)
 119 {
 120     if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
 121         return false;
 122
 123     if ( !MSWCreateControl(wxT("BUTTON"), label, pos, size) )
 124         return false;
 125
 126 #ifndef __WXWINCE__
 127     if (!wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
 128         Connect(wxEVT_PAINT, wxPaintEventHandler(wxStaticBox::OnPaint));
 129 #endif // !__WXWINCE__
 130
 131     return true;
 132 }
 133
 134 wxBorder wxStaticBox::GetDefaultBorder() const
 135 {
 136     return wxBORDER_NONE;
 137 }
 138
 139 WXDWORD wxStaticBox::MSWGetStyle(long style, WXDWORD *exstyle) const
 140 {
 141     long styleWin = wxStaticBoxBase::MSWGetStyle(style, exstyle);
 142
 143     // no need for it anymore, must be removed for wxRadioBox child
 144     // buttons to be able to repaint themselves
 145     styleWin &= ~WS_CLIPCHILDREN;
 146
 147     if ( exstyle )
 148     {
 149 #ifndef __WXWINCE__
 150         if (wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
 151             *exstyle = WS_EX_TRANSPARENT;
 152         else
 153 #endif
 154             *exstyle = 0;
 155     }
 156
 157     return styleWin | BS_GROUPBOX;
 158 }
 159
 160 wxSize wxStaticBox::DoGetBestSize() const
 161 {
 162     int cx, cy;
 163     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
 164
 165     int wBox;
 166     GetTextExtent(wxGetWindowText(m_hWnd), &wBox, &cy);
 167
 168     wBox += 3*cx;
 169     int hBox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 170
 171     return wxSize(wBox, hBox);
 172 }
 173
 174 void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const
 175 {
 176     wxStaticBoxBase::GetBordersForSizer(borderTop, borderOther);
 177
 178     // need extra space, don't know how much but this seems to be enough
 179     *borderTop += GetCharHeight()/3;
 180 }
 181
 182 // all the hacks below are not necessary for WinCE
 183 #ifndef __WXWINCE__
 184
 185 WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 186 {
 187     if ( nMsg == WM_NCHITTEST )
 188     {
 189         // This code breaks some other processing such as enter/leave tracking
 190         // so it's off by default.
 191
 192         static int s_useHTClient = -1;
 193         if (s_useHTClient == -1)
 194             s_useHTClient = wxSystemOptions::GetOptionInt(wxT("msw.staticbox.htclient"));
 195         if (s_useHTClient == 1)
 196         {
 197             int xPos = GET_X_LPARAM(lParam);
 198             int yPos = GET_Y_LPARAM(lParam);
 199
 200             ScreenToClient(&xPos, &yPos);
 201
 202             // Make sure you can drag by the top of the groupbox, but let
 203             // other (enclosed) controls get mouse events also
 204             if ( yPos < 10 )
 205                 return (long)HTCLIENT;
 206         }
 207     }
 208
 209     return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 210 }
 211
 212 // ----------------------------------------------------------------------------
 213 // static box drawing
 214 // ----------------------------------------------------------------------------
 215
 216 /*
 217    We draw the static box ourselves because it's the only way to prevent it
 218    from flickering horribly on resize (because everything inside the box is
 219    erased twice: once when the box itself is repainted and second time when
 220    the control inside it is repainted) without using WS_EX_TRANSPARENT style as
 221    we used to do and which resulted in other problems.
 222  */
 223
 224 // MSWGetRegionWithoutSelf helper: removes the given rectangle from region
 225 static inline void
 226 SubtractRectFromRgn(HRGN hrgn, int left, int top, int right, int bottom)
 227 {
 228     AutoHRGN hrgnRect(::CreateRectRgn(left, top, right, bottom));
 229     if ( !hrgnRect )
 230     {
 231         wxLogLastError(_T("CreateRectRgn()"));
 232         return;
 233     }
 234
 235     ::CombineRgn(hrgn, hrgn, hrgnRect, RGN_DIFF);
 236 }
 237
 238 void wxStaticBox::MSWGetRegionWithoutSelf(WXHRGN hRgn, int w, int h)
 239 {
 240     HRGN hrgn = (HRGN)hRgn;
 241
 242     // remove the area occupied by the static box borders from the region
 243     int borderTop, border;
 244     GetBordersForSizer(&borderTop, &border);
 245
 246     // top
 247     SubtractRectFromRgn(hrgn, 0, 0, w, borderTop);
 248
 249     // bottom
 250     SubtractRectFromRgn(hrgn, 0, h - border, w, h);
 251
 252     // left
 253     SubtractRectFromRgn(hrgn, 0, 0, border, h);
 254
 255     // right
 256     SubtractRectFromRgn(hrgn, w - border, 0, w, h);
 257 }
 258
 259 WXHRGN wxStaticBox::MSWGetRegionWithoutChildren()
 260 {
 261     RECT rc;
 262     ::GetWindowRect(GetHwnd(), &rc);
 263     HRGN hrgn = ::CreateRectRgn(rc.left, rc.top, rc.right + 1, rc.bottom + 1);
 264
 265     // iterate over all child windows (not just wxWindows but all windows)
 266     for ( HWND child = ::GetWindow(GetHwndOf(GetParent()), GW_CHILD);
 267           child;
 268           child = ::GetWindow(child, GW_HWNDNEXT) )
 269     {
 270         if ( ! ::IsWindowVisible(child) )
 271         {
 272             // if the window isn't visible then it doesn't need clipped
 273             continue;
 274         }
 275
 276         LONG style = ::GetWindowLong(child, GWL_STYLE);
 277         wxString str(wxGetWindowClass(child));
 278         str.UpperCase();
 279         if ( str == wxT("BUTTON") && (style & BS_GROUPBOX) == BS_GROUPBOX )
 280         {
 281             // Don't clip any static boxes, not just this one.  This will
 282             // result in flicker in overlapping static boxes, but at least
 283             // they will all be drawn correctly and we shouldn't have
 284             // overlapping windows anyway.
 285             continue;
 286         }
 287
 288         ::GetWindowRect(child, &rc);
 289         if ( ::RectInRegion(hrgn, &rc) )
 290         {
 291             // need to remove WS_CLIPSIBLINGS from all sibling windows
 292             // that are within this staticbox if set
 293             if ( style & WS_CLIPSIBLINGS )
 294             {
 295                 style &= ~WS_CLIPSIBLINGS;
 296                 ::SetWindowLong(child, GWL_STYLE, style);
 297
 298                 // MSDN: "If you have changed certain window data using
 299                 // SetWindowLong, you must call SetWindowPos to have the
 300                 // changes take effect."
 301                 ::SetWindowPos(child, NULL, 0, 0, 0, 0,
 302                                SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
 303                                SWP_FRAMECHANGED);
 304             }
 305
 306             AutoHRGN hrgnChild(::CreateRectRgnIndirect(&rc));
 307             ::CombineRgn(hrgn, hrgn, hrgnChild, RGN_DIFF);
 308         }
 309     }
 310
 311     return (WXHRGN)hrgn;
 312 }
 313
 314 // helper for OnPaint(): really erase the background, i.e. do it even if we
 315 // don't have any non default brush for doing it (DoEraseBackground() doesn't
 316 // do anything in such case)
 317 void wxStaticBox::PaintBackground(wxDC& dc, const RECT& rc)
 318 {
 319     // note that we do not use the box background colour here, it shouldn't
 320     // apply to its interior for several reasons:
 321     //  1. wxGTK doesn't do it
 322     //  2. controls inside the box don't get correct bg colour because they
 323     //     are not our children so we'd have some really ugly colour mix if
 324     //     we did it
 325     //  3. this is backwards compatible behaviour and some people rely on it,
 326     //     see http://groups.google.com/groups?selm=4252E932.3080801%40able.es
 327     wxWindow *parent = GetParent();
 328     HBRUSH hbr = (HBRUSH)parent->MSWGetBgBrush(dc.GetHDC(), GetHWND());
 329
 330     // if there is no special brush for painting this control, just use the
 331     // solid background colour
 332     wxBrush brush;
 333     if ( !hbr )
 334     {
 335         brush = wxBrush(parent->GetBackgroundColour());
 336         hbr = GetHbrushOf(brush);
 337     }
 338
 339     ::FillRect(GetHdcOf(dc), &rc, hbr);
 340 }
 341
 342 void wxStaticBox::PaintForeground(wxDC& dc, const RECT& WXUNUSED(rc))
 343 {
 344     // NB: neither setting the text colour nor transparent background mode
 345     //     doesn't change anything: the static box def window proc still
 346     //     draws the label in its own colours, so if we want to have control
 347     //     over this we really have to draw everything ourselves
 348     MSWDefWindowProc(WM_PAINT, (WPARAM)GetHdcOf(dc), 0);
 349 }
 350
 351 void wxStaticBox::OnPaint(wxPaintEvent& WXUNUSED(event))
 352 {
 353     RECT rc;
 354     ::GetClientRect(GetHwnd(), &rc);
 355
 356     // draw the entire box in a memory DC
 357     wxMemoryDC memdc;
 358     wxBitmap bitmap(rc.right, rc.bottom);
 359     memdc.SelectObject(bitmap);
 360
 361     PaintBackground(memdc, rc);
 362     PaintForeground(memdc, rc);
 363
 364     // now only blit the static box border itself, not the interior, to avoid
 365     // flicker when background is drawn below
 366     //
 367     // note that it seems to be faster to do 4 small blits here and then paint
 368     // directly into wxPaintDC than painting background in wxMemoryDC and then
 369     // blitting everything at once to wxPaintDC, this is why we do it like this
 370     wxPaintDC dc(this);
 371     int borderTop, border;
 372     GetBordersForSizer(&borderTop, &border);
 373
 374     // top
 375     dc.Blit(border, 0, rc.right - border, borderTop,
 376             &memdc, border, 0);
 377     // bottom
 378     dc.Blit(border, rc.bottom - border, rc.right - border, rc.bottom,
 379             &memdc, border, rc.bottom - border);
 380     // left
 381     dc.Blit(0, 0, border, rc.bottom,
 382             &memdc, 0, 0);
 383     // right
 384     dc.Blit(rc.right - border, 0, rc.right, rc.bottom,
 385             &memdc, rc.right - border, 0);
 386
 387
 388     // create the region excluding box children
 389     AutoHRGN hrgn((HRGN)MSWGetRegionWithoutChildren());
 390     RECT rcWin;
 391     ::GetWindowRect(GetHwnd(), &rcWin);
 392     ::OffsetRgn(hrgn, -rcWin.left, -rcWin.top);
 393
 394     // and also the box itself
 395     MSWGetRegionWithoutSelf((WXHRGN) hrgn, rc.right, rc.bottom);
 396     HDCClipper clipToBg(GetHdcOf(dc), hrgn);
 397
 398     // paint the inside of the box (excluding box itself and child controls)
 399     PaintBackground(dc, rc);
 400 }
 401
 402 #endif // !__WXWINCE__
 403
 404 #endif // wxUSE_STATBOX
 405