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git.saurik.com Git - wxWidgets.git/blob - src/msw/ownerdrw.cpp
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: msw/ownerdrw.cpp
3 // Purpose: implementation of wxOwnerDrawn class
4 // Author: Vadim Zeitlin
8 // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
9 // Licence: wxWindows license
10 ///////////////////////////////////////////////////////////////////////////////
13 #pragma implementation
16 // For compilers that support precompilation, includes "wx.h".
17 #include "wx/wxprec.h"
18 #include "wx/msw/private.h"
25 #include "wx/window.h"
26 #include "wx/msw/private.h"
28 #include "wx/bitmap.h"
29 #include "wx/dcmemory.h"
34 #include "wx/settings.h"
35 #include "wx/ownerdrw.h"
36 #include "wx/menuitem.h"
37 #include "wx/fontutil.h"
42 // ============================================================================
43 // implementation of wxOwnerDrawn class
44 // ============================================================================
48 wxOwnerDrawn::wxOwnerDrawn(const wxString
& str
,
49 bool bCheckable
, bool WXUNUSED(bMenuItem
))
52 #if defined(__WXMSW__) && defined(__WIN32__) && defined(SM_CXMENUCHECK)
53 // get the default menu height and font from the system
55 nm
.cbSize
= sizeof (NONCLIENTMETRICS
);
56 SystemParametersInfo (SPI_GETNONCLIENTMETRICS
,0,&nm
,0);
57 m_nMinHeight
= nm
.iMenuHeight
;
59 // nm.iMenuWidth is the system default for the width of
60 // menu icons and checkmarks
61 if (ms_nDefaultMarginWidth
== 0)
63 ms_nDefaultMarginWidth
= nm
.iMenuWidth
;
64 ms_nLastMarginWidth
= nm
.iMenuWidth
;
67 wxNativeFontInfo info
;
68 memcpy(&info
.lf
, &nm
.lfMenuFont
, sizeof(LOGFONT
));
71 // windows clean install default
74 if (ms_nDefaultMarginWidth
== 0)
76 ms_nDefaultMarginWidth
= 18;
77 ms_nLastMarginWidth
= 18;
80 m_font
= *wxNORMAL_FONT
;
83 m_bCheckable
= bCheckable
;
84 m_bOwnerDrawn
= FALSE
;
86 m_nMarginWidth
= ms_nLastMarginWidth
;
90 // these items will be set during the first invocation of the c'tor,
91 // because the values will be determined by checking the system settings,
92 // which is a chunk of code
93 size_t wxOwnerDrawn::ms_nDefaultMarginWidth
= 0;
94 size_t wxOwnerDrawn::ms_nLastMarginWidth
= 0;
100 // get size of the item
101 bool wxOwnerDrawn::OnMeasureItem(size_t *pwidth
, size_t *pheight
)
105 wxString str
= wxStripMenuCodes(m_strName
);
107 // # without this menu items look too tightly packed (at least under Windows)
108 str
+= wxT('W'); // 'W' is typically the widest letter
111 dc
.SetFont(GetFont());
113 dc
.GetTextExtent(str
, (long *)pwidth
, (long *)pheight
);
115 if (!m_strAccel
.IsEmpty())
117 // measure the accelerator string, and add it's width to
118 // the total item width, plus 16 (Accelerators are right justified,
119 // with the right edge of the text rectangle 16 pixels left of
120 // the right edge of the menu)
122 int accel_width
, accel_height
;
123 dc
.GetTextExtent(m_strAccel
, &accel_width
, &accel_height
);
124 *pwidth
+= (accel_width
+ 16);
127 // JACS: items still look too tightly packed, so adding 5 pixels.
128 (*pheight
) = (*pheight
) + 5;
130 // Ray Gilbert's changes - Corrects the problem of a BMP
131 // being placed next to text in a menu item, and the BMP does
132 // not match the size expected by the system. This will
133 // resize the space so the BMP will fit. Without this, BMPs
134 // must be no larger or smaller than 16x16.
135 if (m_bmpChecked
.Ok())
137 // Is BMP height larger then text height?
138 size_t adjustedHeight
= m_bmpChecked
.GetHeight() +
139 wxSystemSettings::GetMetric(wxSYS_EDGE_Y
);
140 if (*pheight
< adjustedHeight
)
141 *pheight
= adjustedHeight
;
143 // Does BMP encroach on default check menu position?
144 size_t adjustedWidth
= m_bmpChecked
.GetWidth() +
145 (wxSystemSettings::GetMetric(wxSYS_EDGE_X
) * 2);
146 if (ms_nDefaultMarginWidth
< adjustedWidth
)
147 *pwidth
+= adjustedWidth
- ms_nDefaultMarginWidth
;
149 // Do we need to widen margin to fit BMP?
150 if ((size_t)GetMarginWidth() != adjustedWidth
)
151 SetMarginWidth(adjustedWidth
);
154 // make sure that this item is at least as
155 // tall as the user's system settings specify
156 if (*pheight
< m_nMinHeight
)
157 *pheight
= m_nMinHeight
;
159 m_nHeight
= *pheight
; // remember height for use in OnDrawItem
164 // searching for this macro you'll find all the code where I'm using the native
165 // Win32 GDI functions and not wxWindows ones. Might help to whoever decides to
166 // port this code to X. (VZ)
168 // JACS: TODO. Why does a disabled but highlighted item still
169 // get drawn embossed? How can we tell DrawState that we don't want the
172 #if defined(__WIN32__) && !defined(__SC__) && !defined(__TWIN32__)
173 #define O_DRAW_NATIVE_API // comments below explain why I use it
177 bool wxOwnerDrawn::OnDrawItem(wxDC
& dc
,
182 // we do nothing on focus change
183 if ( act
== wxODFocusChanged
)
187 #define ToRGB(col) PALETTERGB(col.Red(), col.Green(), col.Blue())
188 #define UnRGB(col) GetRValue(col), GetGValue(col), GetBValue(col)
192 DWORD colBack
, colText
;
193 if ( st
& wxODSelected
) {
194 colBack
= GetSysColor(COLOR_HIGHLIGHT
);
195 if (!(st
& wxODDisabled
))
197 colText
= GetSysColor(COLOR_HIGHLIGHTTEXT
);
201 colText
= GetSysColor(COLOR_GRAYTEXT
);
205 // fall back to default colors if none explicitly specified
206 colBack
= m_colBack
.Ok() ? ToRGB(m_colBack
) : GetSysColor(COLOR_WINDOW
);
207 colText
= m_colText
.Ok() ? ToRGB(m_colText
) : GetSysColor(COLOR_WINDOWTEXT
);
210 #ifdef O_DRAW_NATIVE_API
211 #define hdc (HDC)dc.GetHDC()
212 COLORREF colOldText
= ::SetTextColor(hdc
, colText
),
213 colOldBack
= ::SetBkColor(hdc
, colBack
);
215 dc
.SetTextForeground(wxColor(UnRGB(colText
)));
216 dc
.SetTextBackground(wxColor(UnRGB(colBack
)));
219 // select the font and draw the text
220 // ---------------------------------
223 // determine where to draw and leave space for a check-mark.
224 // Add 3 pixel padding so text appears well within highlight rectangle
225 int x
= rc
.x
+ GetMarginWidth() + 3;
228 // using native API because it reckognizes '&'
229 #ifdef O_DRAW_NATIVE_API
230 int nPrevMode
= SetBkMode(hdc
, TRANSPARENT
);
231 HBRUSH hbr
= CreateSolidBrush(colBack
),
232 hPrevBrush
= (HBRUSH
)SelectObject(hdc
, hbr
);
234 RECT rectFill
= { rc
.GetLeft(), rc
.GetTop(), rc
.GetRight()+1, rc
.GetBottom() };
236 if ( st
& wxODSelected
&& m_bmpChecked
.Ok()) {
237 // only draw the highlight under the text, not under
238 // the bitmap or checkmark; leave a 1-pixel gap.
239 rectFill
.left
= GetMarginWidth() + 1;
242 FillRect(hdc
, &rectFill
, hbr
);
244 // use default font if no font set
247 m_font
.RealizeResource();
248 hfont
= (HFONT
)m_font
.GetResourceHandle();
251 hfont
= (HFONT
)::GetStockObject(SYSTEM_FONT
);
254 HFONT hPrevFont
= (HFONT
) ::SelectObject(hdc
, hfont
);
256 wxString strMenuText
= m_strName
.BeforeFirst('\t');
258 ::DrawState(hdc
, NULL
, NULL
,
259 (LPARAM
)strMenuText
.c_str(), strMenuText
.length(),
260 x
, rc
.y
+ 1, rc
.GetWidth(), rc
.GetHeight(),
262 (((st
& wxODDisabled
) && !(st
& wxODSelected
)) ? DSS_DISABLED
: 0));
264 if ( !m_strAccel
.empty() )
266 int accel_width
, accel_height
;
267 dc
.GetTextExtent(m_strAccel
, &accel_width
, &accel_height
);
269 ::DrawState(hdc
, NULL
, NULL
,
270 (LPARAM
)m_strAccel
.c_str(), m_strAccel
.length(),
271 rc
.GetRight() - accel_width
- 16, rc
.y
+ 1, 0, 0,
273 (((st
& wxODDisabled
) && !(st
& wxODSelected
)) ? DSS_DISABLED
: 0));
276 (void)SelectObject(hdc
, hPrevBrush
);
277 (void)SelectObject(hdc
, hPrevFont
);
278 (void)SetBkMode(hdc
, nPrevMode
);
282 dc
.SetFont(GetFont());
283 dc
.DrawText(wxStripMenuCodes(m_strName
), x
, rc
.y
);
284 #endif //O_DRAW_NATIVE_API
288 if ( IsCheckable() && !m_bmpChecked
.Ok() ) {
289 if ( st
& wxODChecked
) {
290 // using native APIs for performance and simplicity
291 #ifdef O_DRAW_NATIVE_API
292 // what goes on: DrawFrameControl creates a b/w mask,
293 // then we copy it to screen to have right colors
295 // first create a monochrome bitmap in a memory DC
296 HDC hdcMem
= CreateCompatibleDC(hdc
);
297 HBITMAP hbmpCheck
= CreateBitmap(GetMarginWidth(), m_nHeight
, 1, 1, 0);
298 SelectObject(hdcMem
, hbmpCheck
);
300 // then draw a check mark into it
301 RECT rect
= { 0, 0, GetMarginWidth(), m_nHeight
};
304 ::DrawFrameControl(hdcMem
, &rect
, DFC_MENU
, DFCS_MENUCHECK
);
307 // finally copy it to screen DC and clean up
308 BitBlt(hdc
, rc
.x
, rc
.y
, GetMarginWidth(), m_nHeight
,
309 hdcMem
, 0, 0, SRCCOPY
);
312 DeleteObject(hbmpCheck
);
314 // #### to do: perhaps using Marlett font (create equiv. font under X)
315 // wxFAIL("not implemented");
316 #endif //O_DRAW_NATIVE_API
320 // for uncheckable item we use only the 'checked' bitmap
321 wxBitmap
bmp(GetBitmap(IsCheckable() ? ((st
& wxODChecked
) != 0) : TRUE
));
323 wxMemoryDC
dcMem(&dc
);
324 dcMem
.SelectObject(bmp
);
327 int nBmpWidth
= bmp
.GetWidth(),
328 nBmpHeight
= bmp
.GetHeight();
330 // there should be enough place!
331 wxASSERT((nBmpWidth
<= rc
.GetWidth()) && (nBmpHeight
<= rc
.GetHeight()));
333 int heightDiff
= m_nHeight
- nBmpHeight
;
334 dc
.Blit(rc
.x
+ (GetMarginWidth() - nBmpWidth
) / 2,
335 rc
.y
+ heightDiff
/ 2,
336 nBmpWidth
, nBmpHeight
,
337 &dcMem
, 0, 0, wxCOPY
, TRUE
/* use mask */);
339 if ( st
& wxODSelected
) {
344 x2
= x1
+ GetMarginWidth() - 1;
345 y2
= y1
+ m_nHeight
- 1;
347 dc
.SetPen(*wxWHITE_PEN
);
348 dc
.DrawLine(x1
, y1
, x2
, y1
);
349 dc
.DrawLine(x1
, y1
, x1
, y2
);
350 dc
.SetPen(*wxGREY_PEN
);
351 dc
.DrawLine(x1
, y2
-1, x2
, y2
-1);
352 dc
.DrawLine(x2
, y1
, x2
, y2
);
357 #ifdef O_DRAW_NATIVE_API
358 ::SetTextColor(hdc
, colOldText
);
359 ::SetBkColor(hdc
, colOldBack
);
362 #endif //O_DRAW_NATIVE_API
368 #endif // wxUSE_OWNER_DRAWN