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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 licence
10 ///////////////////////////////////////////////////////////////////////////////
11
12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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 #include "wx/fontutil.h"
38 #include "wx/module.h"
39
40 #if wxUSE_OWNER_DRAWN
41
42 class wxMSWSystemMenuFontModule : public wxModule
43 {
44 public:
45
46 virtual bool OnInit()
47 {
48 ms_systemMenuFont = new wxFont;
49
50 #if defined(__WXMSW__) && defined(__WIN32__) && defined(SM_CXMENUCHECK)
51 NONCLIENTMETRICS nm;
52 nm.cbSize = sizeof(NONCLIENTMETRICS);
53 SystemParametersInfo(SPI_GETNONCLIENTMETRICS,0,&nm,0);
54
55 ms_systemMenuButtonWidth = nm.iMenuHeight;
56 ms_systemMenuHeight = nm.iMenuHeight;
57
58 // create menu font
59 wxNativeFontInfo info;
60 memcpy(&info.lf, &nm.lfMenuFont, sizeof(LOGFONT));
61 ms_systemMenuFont->Create(info);
62 #endif
63
64 return true;
65 }
66
67 virtual void OnExit()
68 {
69 delete ms_systemMenuFont;
70 ms_systemMenuFont = NULL;
71 }
72
73 static wxFont* ms_systemMenuFont;
74 static int ms_systemMenuButtonWidth; // windows clean install default
75 static int ms_systemMenuHeight; // windows clean install default
76 private:
77 DECLARE_DYNAMIC_CLASS(wxMSWSystemMenuFontModule)
78 };
79
80 // these static variables are by the wxMSWSystemMenuFontModule object
81 // and reflect the system settings returned by the Win32 API's
82 // SystemParametersInfo() call.
83
84 wxFont* wxMSWSystemMenuFontModule::ms_systemMenuFont = NULL;
85 int wxMSWSystemMenuFontModule::ms_systemMenuButtonWidth = 18; // windows clean install default
86 int wxMSWSystemMenuFontModule::ms_systemMenuHeight = 18; // windows clean install default
87
88 IMPLEMENT_DYNAMIC_CLASS(wxMSWSystemMenuFontModule, wxModule)
89
90 // ============================================================================
91 // implementation of wxOwnerDrawn class
92 // ============================================================================
93
94 // ctor
95 // ----
96 wxOwnerDrawn::wxOwnerDrawn(const wxString& str,
97 bool bCheckable, bool bMenuItem)
98 : m_strName(str)
99 {
100 // get the default menu height and font from the system
101 NONCLIENTMETRICS nm;
102 nm.cbSize = sizeof (NONCLIENTMETRICS);
103 SystemParametersInfo (SPI_GETNONCLIENTMETRICS,0,&nm,0);
104 m_nMinHeight = nm.iMenuHeight;
105
106 // nm.iMenuWidth is the system default for the width of
107 // menu icons and checkmarks
108 if (ms_nDefaultMarginWidth == 0)
109 {
110 ms_nDefaultMarginWidth = wxMSWSystemMenuFontModule::ms_systemMenuButtonWidth;
111 ms_nLastMarginWidth = wxMSWSystemMenuFontModule::ms_systemMenuButtonWidth;
112 }
113
114 if (wxMSWSystemMenuFontModule::ms_systemMenuFont->Ok() && bMenuItem)
115 {
116 m_font = *wxMSWSystemMenuFontModule::ms_systemMenuFont;
117 }
118 else
119 {
120 m_font = *wxNORMAL_FONT;
121 }
122
123 m_bCheckable = bCheckable;
124 m_bOwnerDrawn = FALSE;
125 m_nHeight = 0;
126 m_nMarginWidth = ms_nLastMarginWidth;
127 m_nMinHeight = wxMSWSystemMenuFontModule::ms_systemMenuHeight;
128
129 m_bmpDisabled = wxNullBitmap;
130 }
131
132
133 // these items will be set during the first invocation of the c'tor,
134 // because the values will be determined by checking the system settings,
135 // which is a chunk of code
136 size_t wxOwnerDrawn::ms_nDefaultMarginWidth = 0;
137 size_t wxOwnerDrawn::ms_nLastMarginWidth = 0;
138
139
140 // drawing
141 // -------
142
143 // get size of the item
144 // The item size includes the menu string, the accel string,
145 // the bitmap and size for a submenu expansion arrow...
146 bool wxOwnerDrawn::OnMeasureItem(size_t *pwidth, size_t *pheight)
147 {
148 wxMemoryDC dc;
149
150 wxString str = wxStripMenuCodes(m_strName);
151
152 // if we have a valid accel string, then pad out
153 // the menu string so the menu and accel string are not
154 // placed ontop of eachother.
155 if ( !m_strAccel.empty() )
156 {
157 str.Pad(str.Length()%8);
158 str += m_strAccel;
159 }
160
161 if (m_font.Ok())
162 dc.SetFont(GetFont());
163
164 dc.GetTextExtent(str, (long *)pwidth, (long *)pheight);
165
166 // add space at the end of the menu for the submenu expansion arrow
167 // this will also allow offsetting the accel string from the right edge
168 *pwidth += GetDefaultMarginWidth() + 16;
169
170 // increase size to accomodate bigger bitmaps if necessary
171 if (m_bmpChecked.Ok())
172 {
173 // Is BMP height larger then text height?
174 size_t adjustedHeight = m_bmpChecked.GetHeight() +
175 2*wxSystemSettings::GetMetric(wxSYS_EDGE_Y);
176 if (*pheight < adjustedHeight)
177 *pheight = adjustedHeight;
178
179 // Does BMP encroach on default check menu position?
180 size_t adjustedWidth = m_bmpChecked.GetWidth();
181
182 // Do we need to widen margin to fit BMP?
183 if ((size_t)GetMarginWidth() < adjustedWidth)
184 SetMarginWidth(adjustedWidth);
185 }
186
187 // make sure that this item is at least as
188 // tall as the user's system settings specify
189 if (*pheight < m_nMinHeight)
190 *pheight = m_nMinHeight;
191
192 // remember height for use in OnDrawItem
193 m_nHeight = *pheight;
194
195 return TRUE;
196 }
197
198 // draw the item
199 bool wxOwnerDrawn::OnDrawItem(wxDC& dc,
200 const wxRect& rc,
201 wxODAction act,
202 wxODStatus st)
203 {
204 // we do nothing on focus change
205 if ( act == wxODFocusChanged )
206 return TRUE;
207
208
209 // this flag determines whether or not an edge will
210 // be drawn around the bitmap. In most "windows classic"
211 // applications, a 1-pixel highlight edge is drawn around
212 // the bitmap of an item when it is selected. However,
213 // with the new "luna" theme, no edge is drawn around
214 // the bitmap because the background is white (this applies
215 // only to "non-XP style" menus w/ bitmaps --
216 // see IE 6 menus for an example)
217
218 bool draw_bitmap_edge = true;
219
220 // set the colors
221 // --------------
222 DWORD colBack, colText;
223 if ( st & wxODSelected ) {
224 colBack = GetSysColor(COLOR_HIGHLIGHT);
225 if (!(st & wxODDisabled))
226 {
227 colText = GetSysColor(COLOR_HIGHLIGHTTEXT);
228 }
229 else
230 {
231 colText = GetSysColor(COLOR_GRAYTEXT);
232 }
233 }
234 else {
235 // fall back to default colors if none explicitly specified
236 colBack = m_colBack.Ok() ? wxColourToPalRGB(m_colBack)
237 : GetSysColor(COLOR_WINDOW);
238 colText = m_colText.Ok() ? wxColourToPalRGB(m_colText)
239 : GetSysColor(COLOR_WINDOWTEXT);
240 }
241
242
243 // don't draw an edge around the bitmap, if background is white ...
244 DWORD menu_bg_color = GetSysColor(COLOR_MENU);
245 if ( ( GetRValue( menu_bg_color ) >= 0xf0 &&
246 GetGValue( menu_bg_color ) >= 0xf0 &&
247 GetBValue( menu_bg_color ) >= 0xf0 )
248 // ... or if the menu item is disabled
249 || ( st & wxODDisabled )
250 )
251 {
252 draw_bitmap_edge = false;
253 }
254
255
256 HDC hdc = GetHdcOf(dc);
257 COLORREF colOldText = ::SetTextColor(hdc, colText),
258 colOldBack = ::SetBkColor(hdc, colBack);
259
260 int margin = GetMarginWidth() + wxSystemSettings::GetMetric(wxSYS_EDGE_X);
261
262 // select the font and draw the text
263 // ---------------------------------
264
265
266 // determine where to draw and leave space for a check-mark.
267 int xText = rc.x + margin;
268
269
270 // using native API because it reckognizes '&'
271 int nPrevMode = SetBkMode(hdc, TRANSPARENT);
272 HBRUSH hbr = CreateSolidBrush(colBack),
273 hPrevBrush = (HBRUSH)SelectObject(hdc, hbr);
274
275 RECT rectFill = { rc.GetLeft(), rc.GetTop(),
276 rc.GetRight() + 1, rc.GetBottom() + 1 };
277
278 if ( (st & wxODSelected) && m_bmpChecked.Ok() ) {
279 // only draw the highlight under the text, not under
280 // the bitmap or checkmark
281 rectFill.left = xText;
282 }
283
284 FillRect(hdc, &rectFill, hbr);
285
286 // use default font if no font set
287 HFONT hfont;
288 if ( m_font.Ok() ) {
289 m_font.RealizeResource();
290 hfont = (HFONT)m_font.GetResourceHandle();
291 }
292 else {
293 hfont = (HFONT)::GetStockObject(SYSTEM_FONT);
294 }
295
296 HFONT hPrevFont = (HFONT) ::SelectObject(hdc, hfont);
297
298 wxString strMenuText = m_strName.BeforeFirst('\t');
299
300 SIZE sizeRect;
301 GetTextExtentPoint32(hdc,strMenuText.c_str(), strMenuText.Length(),&sizeRect);
302 ::DrawState(hdc, NULL, NULL,
303 (LPARAM)strMenuText.c_str(), strMenuText.length(),
304 xText, rc.y+( (int) ((rc.GetHeight()-sizeRect.cy)/2.0) )-1, // centre text vertically
305 rc.GetWidth()-margin, sizeRect.cy,
306 DST_PREFIXTEXT |
307 (((st & wxODDisabled) && !(st & wxODSelected)) ? DSS_DISABLED : 0));
308
309 // ::SetTextAlign(hdc, TA_RIGHT) doesn't work with DSS_DISABLED or DSS_MONO
310 // as last parameter in DrawState() (at least with Windows98). So we have
311 // to take care of right alignment ourselves.
312 if ( !m_strAccel.empty() )
313 {
314 int accel_width, accel_height;
315 dc.GetTextExtent(m_strAccel, &accel_width, &accel_height);
316 // right align accel string with right edge of menu ( offset by the
317 // margin width )
318 ::DrawState(hdc, NULL, NULL,
319 (LPARAM)m_strAccel.c_str(), m_strAccel.length(),
320 rc.GetWidth()-margin-accel_width, rc.y+(int) ((rc.GetHeight()-sizeRect.cy)/2.0),
321 rc.GetWidth()-margin-accel_width, sizeRect.cy,
322 DST_TEXT |
323 (((st & wxODDisabled) && !(st & wxODSelected)) ? DSS_DISABLED : 0));
324 }
325
326 (void)SelectObject(hdc, hPrevBrush);
327 (void)SelectObject(hdc, hPrevFont);
328 (void)SetBkMode(hdc, nPrevMode);
329
330 DeleteObject(hbr);
331
332 // draw the bitmap
333 // ---------------
334 if ( IsCheckable() && !m_bmpChecked.Ok() ) {
335 if ( st & wxODChecked ) {
336 // what goes on: DrawFrameControl creates a b/w mask,
337 // then we copy it to screen to have right colors
338
339 // first create a monochrome bitmap in a memory DC
340 HDC hdcMem = CreateCompatibleDC(hdc);
341 HBITMAP hbmpCheck = CreateBitmap(margin, m_nHeight, 1, 1, 0);
342 SelectObject(hdcMem, hbmpCheck);
343
344 // then draw a check mark into it
345 RECT rect = { 0, 0, margin, m_nHeight };
346 if ( m_nHeight > 0 )
347 {
348 ::DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
349 }
350
351 // finally copy it to screen DC and clean up
352 BitBlt(hdc, rc.x, rc.y, margin, m_nHeight,
353 hdcMem, 0, 0, SRCCOPY);
354
355 DeleteDC(hdcMem);
356 DeleteObject(hbmpCheck);
357 }
358 }
359 else {
360 wxBitmap bmp;
361
362 if ( st & wxODDisabled )
363 {
364 bmp = GetDisabledBitmap();
365 }
366
367 if ( !bmp.Ok() )
368 {
369 // for not checkable bitmaps we should always use unchecked one because
370 // their checked bitmap is not set
371 bmp = GetBitmap(!IsCheckable() || (st & wxODChecked));
372 }
373
374 if ( bmp.Ok() ) {
375 wxMemoryDC dcMem(&dc);
376 dcMem.SelectObject(bmp);
377
378 // center bitmap
379 int nBmpWidth = bmp.GetWidth(),
380 nBmpHeight = bmp.GetHeight();
381
382 // there should be enough place!
383 wxASSERT((nBmpWidth <= rc.GetWidth()) && (nBmpHeight <= rc.GetHeight()));
384
385 int heightDiff = m_nHeight - nBmpHeight;
386 dc.Blit(rc.x + (margin - nBmpWidth) / 2,
387 rc.y + heightDiff / 2,
388 nBmpWidth, nBmpHeight,
389 &dcMem, 0, 0, wxCOPY, TRUE /* use mask */);
390
391 if ( st & wxODSelected && draw_bitmap_edge ) {
392 RECT rectBmp = { rc.GetLeft(), rc.GetTop(),
393 rc.GetLeft() + margin,
394 rc.GetTop() + m_nHeight };
395 SetBkColor(hdc, colBack);
396
397 DrawEdge(hdc, &rectBmp, BDR_RAISEDOUTER, BF_SOFT | BF_RECT);
398 }
399 }
400 }
401
402 ::SetTextColor(hdc, colOldText);
403 ::SetBkColor(hdc, colOldBack);
404
405 return TRUE;
406 }
407
408
409 #endif // wxUSE_OWNER_DRAWN
410