| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: msw/ownerdrw.cpp |
| 3 | // Purpose: implementation of wxOwnerDrawn class |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: 13.11.97 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> |
| 9 | // Licence: wxWindows license |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifdef __GNUG__ |
| 13 | #pragma implementation |
| 14 | #endif |
| 15 | |
| 16 | // For compilers that support precompilation, includes "wx.h". |
| 17 | #include "wx/wxprec.h" |
| 18 | #include "wx/msw/private.h" |
| 19 | |
| 20 | #ifdef __BORLANDC__ |
| 21 | #pragma hdrstop |
| 22 | #endif |
| 23 | |
| 24 | #ifndef WX_PRECOMP |
| 25 | #include "wx/window.h" |
| 26 | // #include "wx/msw/private.h" |
| 27 | #include "wx/font.h" |
| 28 | #include "wx/bitmap.h" |
| 29 | #include "wx/dcmemory.h" |
| 30 | #include "wx/menu.h" |
| 31 | #include "wx/utils.h" |
| 32 | #endif |
| 33 | |
| 34 | #include "wx/settings.h" |
| 35 | #include "wx/ownerdrw.h" |
| 36 | #include "wx/menuitem.h" |
| 37 | |
| 38 | #if wxUSE_OWNER_DRAWN |
| 39 | |
| 40 | |
| 41 | // ============================================================================ |
| 42 | // implementation of wxOwnerDrawn class |
| 43 | // ============================================================================ |
| 44 | |
| 45 | // ctor |
| 46 | // ---- |
| 47 | wxOwnerDrawn::wxOwnerDrawn(const wxString& str, |
| 48 | bool bCheckable, bool WXUNUSED(bMenuItem)) |
| 49 | : m_strName(str) |
| 50 | { |
| 51 | m_bCheckable = bCheckable; |
| 52 | m_bOwnerDrawn = FALSE; |
| 53 | m_nHeight = 0; |
| 54 | m_nMarginWidth = ms_nLastMarginWidth; |
| 55 | if (wxNORMAL_FONT) |
| 56 | m_font = * wxNORMAL_FONT; |
| 57 | } |
| 58 | |
| 59 | #if defined(__WXMSW__) && defined(__WIN32__) && defined(SM_CXMENUCHECK) |
| 60 | size_t wxOwnerDrawn::ms_nDefaultMarginWidth = GetSystemMetrics(SM_CXMENUCHECK); |
| 61 | #else // # what is the reasonable default? |
| 62 | size_t wxOwnerDrawn::ms_nDefaultMarginWidth = 15; |
| 63 | #endif |
| 64 | |
| 65 | size_t wxOwnerDrawn::ms_nLastMarginWidth = ms_nDefaultMarginWidth; |
| 66 | |
| 67 | // drawing |
| 68 | // ------- |
| 69 | |
| 70 | // get size of the item |
| 71 | bool wxOwnerDrawn::OnMeasureItem(size_t *pwidth, size_t *pheight) |
| 72 | { |
| 73 | wxMemoryDC dc; |
| 74 | |
| 75 | wxString str = wxStripMenuCodes(m_strName); |
| 76 | |
| 77 | // # without this menu items look too tightly packed (at least under Windows) |
| 78 | str += wxT('W'); // 'W' is typically the widest letter |
| 79 | |
| 80 | if (m_font.Ok()) |
| 81 | dc.SetFont(GetFont()); |
| 82 | |
| 83 | dc.GetTextExtent(str, (long *)pwidth, (long *)pheight); |
| 84 | |
| 85 | // JACS: items still look too tightly packed, so adding 2 pixels. |
| 86 | (*pheight) = (*pheight) + 2; |
| 87 | |
| 88 | // Ray Gilbert's changes - Corrects the problem of a BMP |
| 89 | // being placed next to text in a menu item, and the BMP does |
| 90 | // not match the size expected by the system. This will |
| 91 | // resize the space so the BMP will fit. Without this, BMPs |
| 92 | // must be no larger or smaller than 16x16. |
| 93 | if (m_bmpChecked.Ok()) |
| 94 | { |
| 95 | // Is BMP height larger then text height? |
| 96 | size_t adjustedHeight = m_bmpChecked.GetHeight() + |
| 97 | wxSystemSettings::GetMetric(wxSYS_EDGE_Y); |
| 98 | if (*pheight < adjustedHeight) |
| 99 | *pheight = adjustedHeight; |
| 100 | |
| 101 | // Does BMP encroach on default check menu position? |
| 102 | size_t adjustedWidth = m_bmpChecked.GetWidth() + |
| 103 | (wxSystemSettings::GetMetric(wxSYS_EDGE_X) * 2); |
| 104 | if (ms_nDefaultMarginWidth < adjustedWidth) |
| 105 | *pwidth += adjustedWidth - ms_nDefaultMarginWidth; |
| 106 | |
| 107 | // Do we need to widen margin to fit BMP? |
| 108 | if ((size_t)GetMarginWidth() < adjustedWidth) |
| 109 | SetMarginWidth(adjustedWidth); |
| 110 | } |
| 111 | |
| 112 | m_nHeight = *pheight; // remember height for use in OnDrawItem |
| 113 | |
| 114 | return TRUE; |
| 115 | } |
| 116 | |
| 117 | // searching for this macro you'll find all the code where I'm using the native |
| 118 | // Win32 GDI functions and not wxWindows ones. Might help to whoever decides to |
| 119 | // port this code to X. (VZ) |
| 120 | |
| 121 | // JACS: TODO. Why does a disabled but highlighted item still |
| 122 | // get drawn embossed? How can we tell DrawState that we don't want the |
| 123 | // embossing? |
| 124 | |
| 125 | #if defined(__WIN32__) && !defined(__SC__) && !defined(__TWIN32__) |
| 126 | #define O_DRAW_NATIVE_API // comments below explain why I use it |
| 127 | #endif |
| 128 | |
| 129 | // draw the item |
| 130 | bool wxOwnerDrawn::OnDrawItem(wxDC& dc, |
| 131 | const wxRect& rc, |
| 132 | wxODAction act, |
| 133 | wxODStatus st) |
| 134 | { |
| 135 | // we do nothing on focus change |
| 136 | if ( act == wxODFocusChanged ) |
| 137 | return TRUE; |
| 138 | |
| 139 | // wxColor <-> RGB |
| 140 | #define ToRGB(col) PALETTERGB(col.Red(), col.Green(), col.Blue()) |
| 141 | #define UnRGB(col) GetRValue(col), GetGValue(col), GetBValue(col) |
| 142 | |
| 143 | // set the colors |
| 144 | // -------------- |
| 145 | DWORD colBack, colText; |
| 146 | if ( st & wxODSelected ) { |
| 147 | colBack = GetSysColor(COLOR_HIGHLIGHT); |
| 148 | colText = GetSysColor(COLOR_HIGHLIGHTTEXT); |
| 149 | } |
| 150 | else { |
| 151 | // fall back to default colors if none explicitly specified |
| 152 | colBack = m_colBack.Ok() ? ToRGB(m_colBack) : GetSysColor(COLOR_WINDOW); |
| 153 | colText = m_colText.Ok() ? ToRGB(m_colText) : GetSysColor(COLOR_WINDOWTEXT); |
| 154 | } |
| 155 | |
| 156 | #ifdef O_DRAW_NATIVE_API |
| 157 | #define hdc (HDC)dc.GetHDC() |
| 158 | COLORREF colOldText = ::SetTextColor(hdc, colText), |
| 159 | colOldBack = ::SetBkColor(hdc, colBack); |
| 160 | #else |
| 161 | dc.SetTextForeground(wxColor(UnRGB(colText))); |
| 162 | dc.SetTextBackground(wxColor(UnRGB(colBack))); |
| 163 | #endif |
| 164 | |
| 165 | // select the font and draw the text |
| 166 | // --------------------------------- |
| 167 | |
| 168 | // determine where to draw and leave space for a check-mark. |
| 169 | int x = rc.x + GetMarginWidth(); |
| 170 | |
| 171 | // using native API because it reckognizes '&' |
| 172 | #ifdef O_DRAW_NATIVE_API |
| 173 | int nPrevMode = SetBkMode(hdc, TRANSPARENT); |
| 174 | HBRUSH hbr = CreateSolidBrush(colBack), |
| 175 | hPrevBrush = (HBRUSH)SelectObject(hdc, hbr); |
| 176 | |
| 177 | RECT rectAll = { rc.GetLeft(), rc.GetTop(), rc.GetRight(), rc.GetBottom() }; |
| 178 | FillRect(hdc, &rectAll, hbr); |
| 179 | |
| 180 | DeleteObject(hbr); |
| 181 | |
| 182 | // use default font if no font set |
| 183 | HFONT hfont; |
| 184 | if ( m_font.Ok() ) { |
| 185 | m_font.RealizeResource(); |
| 186 | hfont = (HFONT)m_font.GetResourceHandle(); |
| 187 | } |
| 188 | else { |
| 189 | hfont = (HFONT)::GetStockObject(SYSTEM_FONT); |
| 190 | } |
| 191 | |
| 192 | HFONT hPrevFont = (HFONT) ::SelectObject(hdc, hfont); |
| 193 | DrawState(hdc, NULL, NULL, |
| 194 | (LPARAM)m_strName.c_str(), m_strName.length(), |
| 195 | x, rc.y, rc.GetWidth(), rc.GetHeight(), |
| 196 | DST_PREFIXTEXT | (st & wxODDisabled ? DSS_DISABLED : 0)); |
| 197 | |
| 198 | if ( !m_strAccel.empty() ) |
| 199 | { |
| 200 | RECT r; |
| 201 | r.top = rc.GetTop(); |
| 202 | r.left = rc.GetLeft(); |
| 203 | r.right = rc.GetRight() - GetMarginWidth(); |
| 204 | r.bottom = rc.GetBottom(); |
| 205 | |
| 206 | DrawText(hdc, m_strAccel, m_strAccel.length(), &r, |
| 207 | DT_SINGLELINE | DT_RIGHT | DT_VCENTER); |
| 208 | } |
| 209 | |
| 210 | (void)SelectObject(hdc, hPrevBrush); |
| 211 | (void)SelectObject(hdc, hPrevFont); |
| 212 | (void)SetBkMode(hdc, nPrevMode); |
| 213 | #else |
| 214 | dc.SetFont(GetFont()); |
| 215 | dc.DrawText(m_strName, x, rc.y); |
| 216 | #endif //O_DRAW_NATIVE_API |
| 217 | |
| 218 | // draw the bitmap |
| 219 | // --------------- |
| 220 | if ( IsCheckable() && !m_bmpChecked.Ok() ) { |
| 221 | if ( st & wxODChecked ) { |
| 222 | // using native APIs for performance and simplicity |
| 223 | #ifdef O_DRAW_NATIVE_API |
| 224 | // what goes on: DrawFrameControl creates a b/w mask, |
| 225 | // then we copy it to screen to have right colors |
| 226 | |
| 227 | // first create a monochrome bitmap in a memory DC |
| 228 | HDC hdcMem = CreateCompatibleDC(hdc); |
| 229 | HBITMAP hbmpCheck = CreateBitmap(GetMarginWidth(), m_nHeight, 1, 1, 0); |
| 230 | SelectObject(hdcMem, hbmpCheck); |
| 231 | |
| 232 | // then draw a check mark into it |
| 233 | RECT rect = { 0, 0, GetMarginWidth(), m_nHeight }; |
| 234 | if ( m_nHeight > 0 ) |
| 235 | { |
| 236 | #ifndef __SC__ |
| 237 | DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK); |
| 238 | #endif |
| 239 | } |
| 240 | |
| 241 | // finally copy it to screen DC and clean up |
| 242 | BitBlt(hdc, rc.x, rc.y, GetMarginWidth(), m_nHeight, |
| 243 | hdcMem, 0, 0, SRCCOPY); |
| 244 | |
| 245 | DeleteDC(hdcMem); |
| 246 | DeleteObject(hbmpCheck); |
| 247 | #else |
| 248 | // #### to do: perhaps using Marlett font (create equiv. font under X) |
| 249 | // wxFAIL("not implemented"); |
| 250 | #endif //O_DRAW_NATIVE_API |
| 251 | } |
| 252 | } |
| 253 | else { |
| 254 | // for uncheckable item we use only the 'checked' bitmap |
| 255 | wxBitmap bmp(GetBitmap(IsCheckable() ? ((st & wxODChecked) != 0) : TRUE)); |
| 256 | if ( bmp.Ok() ) { |
| 257 | wxMemoryDC dcMem(&dc); |
| 258 | dcMem.SelectObject(bmp); |
| 259 | |
| 260 | // center bitmap |
| 261 | int nBmpWidth = bmp.GetWidth(), |
| 262 | nBmpHeight = bmp.GetHeight(); |
| 263 | |
| 264 | // there should be enough place! |
| 265 | wxASSERT((nBmpWidth <= rc.GetWidth()) && (nBmpHeight <= rc.GetHeight())); |
| 266 | |
| 267 | int heightDiff = (m_nHeight - nBmpHeight); |
| 268 | // if (heightDiff = -1) |
| 269 | // heightDiff = -2; |
| 270 | |
| 271 | //MT: blit with mask enabled. |
| 272 | dc.Blit(rc.x + (GetMarginWidth() - nBmpWidth) / 2, |
| 273 | rc.y + heightDiff / 2, |
| 274 | nBmpWidth, nBmpHeight, |
| 275 | &dcMem, 0, 0, wxCOPY, TRUE); |
| 276 | |
| 277 | if ( st & wxODSelected ) { |
| 278 | #ifdef O_DRAW_NATIVE_API |
| 279 | RECT rectBmp = { rc.GetLeft(), rc.GetTop(), |
| 280 | rc.GetLeft() + GetMarginWidth(), |
| 281 | rc.GetTop() + m_nHeight }; |
| 282 | SetBkColor(hdc, colBack); |
| 283 | DrawEdge(hdc, &rectBmp, EDGE_RAISED, BF_SOFT | BF_RECT); |
| 284 | #else |
| 285 | // ## to write portable DrawEdge |
| 286 | #endif //O_DRAW_NATIVE_API |
| 287 | } |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | #ifdef O_DRAW_NATIVE_API |
| 292 | ::SetTextColor(hdc, colOldText); |
| 293 | ::SetBkColor(hdc, colOldBack); |
| 294 | |
| 295 | #undef hdc |
| 296 | #endif //O_DRAW_NATIVE_API |
| 297 | |
| 298 | return TRUE; |
| 299 | } |
| 300 | |
| 301 | |
| 302 | #endif // wxUSE_OWNER_DRAWN |
| 303 | |