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don't reset the selection after event was vetoed if there is no old selection
[wxWidgets.git] / src / os2 / ownerdrw.cpp
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: src/os2/ownerdrw.cpp
3 // Purpose: implementation of wxOwnerDrawn class
4 // Author: David Webster
5 // Modified by:
6 // Created: 10/12/99
7 // RCS-ID: $Id$
8 // Copyright: (c) David Webster
9 // Licence: wxWindows licence
10 ///////////////////////////////////////////////////////////////////////////////
11
12 // For compilers that support precompilation, includes "wx.h".
13 #include "wx/wxprec.h"
14
15 #if wxUSE_OWNER_DRAWN
16
17 #ifndef WX_PRECOMP
18 #include "wx/window.h"
19 #include "wx/os2/private.h"
20 #include "wx/font.h"
21 #include "wx/bitmap.h"
22 #include "wx/dcmemory.h"
23 #include "wx/menu.h"
24 #include "wx/utils.h"
25 #include "wx/settings.h"
26 #include "wx/menuitem.h"
27 #endif
28
29 #include "wx/ownerdrw.h"
30
31 // ============================================================================
32 // implementation of wxOwnerDrawn class
33 // ============================================================================
34
35 //
36 // ctor
37 // ----
38 //
39 wxOwnerDrawn::wxOwnerDrawn( const wxString& rsStr,
40 bool bCheckable,
41 bool WXUNUSED(bMenuItem) )
42 : m_strName(rsStr)
43 {
44 m_bCheckable = bCheckable;
45 m_bOwnerDrawn = false;
46 m_nHeight = 0;
47 m_nMarginWidth = ms_nLastMarginWidth;
48 if (wxNORMAL_FONT)
49 m_font = *wxNORMAL_FONT;
50 } // end of wxOwnerDrawn::wxOwnerDrawn
51
52 wxOwnerDrawn::~wxOwnerDrawn() { }
53
54 size_t wxOwnerDrawn::ms_nDefaultMarginWidth = 15;
55
56 size_t wxOwnerDrawn::ms_nLastMarginWidth = ms_nDefaultMarginWidth;
57
58 //
59 // Drawing
60 // -------
61 //
62
63 bool wxOwnerDrawn::OnMeasureItem( size_t* pWidth,
64 size_t* pHeight )
65 {
66 wxMemoryDC vDC;
67
68 wxString sStr = wxStripMenuCodes(m_strName);
69
70 //
71 // If we have a valid accel string, then pad out
72 // the menu string so that the menu and accel string are not
73 // placed on top of each other.
74 if (!m_strAccel.empty() )
75 {
76 sStr.Pad(sStr.length()%8);
77 sStr += m_strAccel;
78 }
79 vDC.SetFont(GetFont());
80 vDC.GetTextExtent( sStr
81 ,(long *)pWidth
82 ,(long *)pHeight
83 );
84 if (!m_strAccel.empty())
85 {
86 //
87 // Measure the accelerator string, and add its width to
88 // the total item width, plus 16 (Accelerators are right justified,
89 // with the right edge of the text rectangle 16 pixels left of
90 // the right edge of the menu)
91 //
92 int nAccelWidth;
93 int nAccelHeight;
94
95 vDC.GetTextExtent( m_strAccel
96 ,&nAccelWidth
97 ,&nAccelHeight
98 );
99 *pWidth += nAccelWidth;
100 }
101
102 //
103 // Add space at the end of the menu for the submenu expansion arrow.
104 // This will also allow offsetting the accel string from the right edge
105 //
106 *pWidth = (size_t)(*pWidth + GetDefaultMarginWidth() * 1.5);
107
108 //
109 // JACS: items still look too tightly packed, so adding 5 pixels.
110 //
111 (*pHeight) += 5;
112
113 //
114 // Ray Gilbert's changes - Corrects the problem of a BMP
115 // being placed next to text in a menu item, and the BMP does
116 // not match the size expected by the system. This will
117 // resize the space so the BMP will fit. Without this, BMPs
118 // must be no larger or smaller than 16x16.
119 //
120 if (m_bmpChecked.Ok())
121 {
122 //
123 // Is BMP height larger then text height?
124 //
125 size_t nAdjustedHeight = m_bmpChecked.GetHeight() +
126 wxSystemSettings::GetMetric(wxSYS_EDGE_Y);
127 if (*pHeight < nAdjustedHeight)
128 *pHeight = nAdjustedHeight;
129
130 //
131 // Does BMP encroach on default check menu position?
132 //
133 size_t nAdjustedWidth = m_bmpChecked.GetWidth() +
134 (wxSystemSettings::GetMetric(wxSYS_EDGE_X) * 2);
135
136 //
137 // Do we need to widen margin to fit BMP?
138 //
139 if ((size_t)GetMarginWidth() < nAdjustedWidth)
140 SetMarginWidth(nAdjustedWidth);
141
142 //
143 // Add the size of the bitmap to our total size...
144 //
145 *pWidth += GetMarginWidth();
146 }
147
148 //
149 // Add the size of the bitmap to our total size - even if we don't have
150 // a bitmap we leave room for one...
151 //
152 *pWidth += GetMarginWidth();
153
154 //
155 // Make sure that this item is at least as
156 // tall as the user's system settings specify
157 //
158 if (*pHeight < m_nMinHeight)
159 *pHeight = m_nMinHeight;
160 m_nHeight = *pHeight; // remember height for use in OnDrawItem
161 return true;
162 } // end of wxOwnerDrawn::OnMeasureItem
163
164 // draw the item
165 bool wxOwnerDrawn::OnDrawItem( wxDC& rDC,
166 const wxRect& rRect,
167 wxODAction eAction,
168 wxODStatus eStatus )
169 {
170 //
171 // We do nothing on focus change
172 //
173 if (eAction == wxODFocusChanged )
174 return true;
175
176 //
177 // Select the font and draw the text
178 // ---------------------------------
179 //
180
181 CHARBUNDLE vCbnd;
182 HPS hPS= rDC.GetHPS();
183 wxColour vColBack;
184 wxColour vColText;
185 COLORREF vRef;
186 RECTL vRect = {rRect.x + 4, rRect.y + 1, rRect.x + (rRect.width - 2), rRect.y + rRect.height};
187
188 memset(&vCbnd, 0, sizeof(CHARBUNDLE));
189
190 //
191 // Use default font if no font set
192 //
193 if (m_font.Ok())
194 {
195 m_font.RealizeResource();
196 }
197 else
198 {
199 ::GpiSetCharSet(hPS, LCID_DEFAULT);
200 }
201
202 //
203 // Based on the status of the menu item, pick the right colors
204 //
205 if (eStatus & wxODSelected)
206 {
207 wxColour vCol2(wxT("WHITE"));
208 vColBack.Set( (unsigned char)0
209 ,(unsigned char)0
210 ,(unsigned char)160
211 ); // no dark blue in color table
212 vColText = vCol2;
213 }
214 else if (eStatus & wxODDisabled)
215 {
216 vRef = (ULONG)::WinQuerySysColor( HWND_DESKTOP
217 ,SYSCLR_MENU // Light gray
218 ,0L
219 );
220 vColBack.Set( GetRValue(vRef)
221 ,GetGValue(vRef)
222 ,GetBValue(vRef)
223 );
224 vRef = (ULONG)::WinQuerySysColor( HWND_DESKTOP
225 ,SYSCLR_MENUDISABLEDTEXT // dark gray
226 ,0L
227 );
228 vColText.Set( GetRValue(vRef)
229 ,GetGValue(vRef)
230 ,GetBValue(vRef)
231 );
232 }
233 else
234 {
235 //
236 // Fall back to default colors if none explicitly specified
237 //
238 vRef = ::WinQuerySysColor( HWND_DESKTOP
239 ,SYSCLR_MENU // we are using gray for all our window backgrounds in wxWidgets
240 ,0L
241 );
242 vColBack.Set( GetRValue(vRef)
243 ,GetGValue(vRef)
244 ,GetBValue(vRef)
245 );
246 vRef = ::WinQuerySysColor( HWND_DESKTOP
247 ,SYSCLR_WINDOWTEXT // Black
248 ,0L
249 );
250 vColText.Set( GetRValue(vRef)
251 ,GetGValue(vRef)
252 ,GetBValue(vRef)
253 );
254 }
255
256 rDC.SetTextBackground(vColBack);
257 rDC.SetTextForeground(vColText);
258 rDC.SetBackgroundMode(wxTRANSPARENT);
259 vCbnd.lColor = vColText.GetPixel();
260 vCbnd.lBackColor = vColBack.GetPixel();
261 ::GpiSetAttrs( hPS
262 ,PRIM_CHAR
263 ,CBB_BACK_COLOR | CBB_COLOR
264 ,0
265 ,&vCbnd
266 );
267 ::GpiSetBackMix( hPS
268 ,BM_LEAVEALONE
269 );
270
271 //
272 // Paint the background
273 //
274 ::WinFillRect(hPS, &vRect, vColBack.GetPixel());
275
276 //
277 // Determine where to draw and leave space for a check-mark.
278 //
279 int nX = rRect.x + GetMarginWidth();
280
281 //
282 // Unfortunately, unlike Win32, PM has no owner drawn specific text
283 // drawing methods like ::DrawState that can cleanly handle accel
284 // mnemonics and deal, automatically, with various states, so we have
285 // to handle them ourselves. Notice Win32 can't handle \t in ownerdrawn
286 // strings either. We cannot handle mnemonics either. We display
287 // them, though, in the hope we can figure them out some day.
288 //
289
290 //
291 // Display main text and accel text separately to align better
292 //
293 wxString sTgt = wxT("\t");
294 wxString sFullString = m_strName; // need to save the original text
295 wxString sAccel;
296 int nIndex;
297 size_t nWidth;
298 size_t nCharWidth;
299 size_t nHeight;
300 bool bFoundMnemonic = false;
301 bool bFoundAccel = false;
302
303 //
304 // Deal with the tab, extracting the Accel text
305 //
306 nIndex = sFullString.Find(sTgt.c_str());
307 if (nIndex != -1)
308 {
309 bFoundAccel = true;
310 sAccel = sFullString.Mid(nIndex + 1);
311 sFullString.Remove(nIndex);
312 }
313
314 //
315 // Deal with the mnemonic character
316 //
317 sTgt = wxT("~");
318 nIndex = sFullString.Find(sTgt.c_str());
319 if (nIndex != -1)
320 {
321 wxString sTmp = sFullString;
322
323 bFoundMnemonic = true;
324 sTmp.Remove(nIndex);
325 rDC.GetTextExtent( sTmp
326 ,(long *)&nWidth
327 ,(long *)&nHeight
328 );
329 sTmp = sFullString[(size_t)(nIndex + 1)];
330 rDC.GetTextExtent( sTmp
331 ,(long *)&nCharWidth
332 ,(long *)&nHeight
333 );
334 sFullString.Replace(sTgt.c_str(), wxEmptyString, true);
335 }
336
337 //
338 // Draw the main item text sans the accel text
339 //
340 POINTL vPntStart = {nX, rRect.y + 4};
341 ::GpiCharStringAt( rDC.GetHPS()
342 ,&vPntStart
343 ,sFullString.length()
344 ,(PCH)sFullString.c_str()
345 );
346 if (bFoundMnemonic)
347 {
348 //
349 // Underline the mnemonic -- still won't work, but at least it "looks" right
350 //
351 wxPen vPen;
352 POINTL vPntEnd = {nX + nWidth + nCharWidth - 3, rRect.y + 2}; //CharWidth is bit wide
353
354 vPntStart.x = nX + nWidth - 1;
355 vPntStart.y = rRect.y + 2; // Make it look pretty!
356 vPen = wxPen(vColText, 1, wxSOLID); // Assuming we are always black
357 rDC.SetPen(vPen);
358 ::GpiMove(hPS, &vPntStart);
359 ::GpiLine(hPS, &vPntEnd);
360 }
361
362 //
363 // Now draw the accel text
364 //
365 if (bFoundAccel)
366 {
367 size_t nWidth;
368 size_t nHeight;
369
370 rDC.GetTextExtent( sAccel
371 ,(long *)&nWidth
372 ,(long *)&nHeight
373 );
374 //
375 // Back off the starting position from the right edge
376 //
377 vPntStart.x = rRect.width - (nWidth + 7);
378 vPntStart.y = rRect.y + 4;
379 ::GpiCharStringAt( rDC.GetHPS()
380 ,&vPntStart
381 ,sAccel.length()
382 ,(PCH)sAccel.c_str()
383 );
384 }
385
386 //
387 // Draw the bitmap
388 // ---------------
389 //
390 if (IsCheckable() && !m_bmpChecked.Ok())
391 {
392 if (eStatus & wxODChecked)
393 {
394 RECTL vRect;
395 HBITMAP hBmpCheck = ::WinGetSysBitmap(HWND_DESKTOP, SBMP_MENUCHECK);
396
397 vRect.xLeft = rRect.x;
398 vRect.xRight = rRect.x + GetMarginWidth();
399 vRect.yBottom = rRect.y;
400 vRect.yTop = rRect.y + m_nHeight - 3;
401
402 ::WinDrawBitmap( hPS // PS for this menuitem
403 ,hBmpCheck // system checkmark
404 ,NULL // draw the whole bitmap
405 ,(PPOINTL)&vRect // destination -- bottom left corner of the menuitem area
406 ,0L // ignored
407 ,0L // draw a bitmap
408 ,DBM_NORMAL // draw normal size
409 );
410 }
411 }
412 else
413 {
414 //
415 // For uncheckable item we use only the 'checked' bitmap
416 //
417 wxBitmap vBmp(GetBitmap(IsCheckable() ? ((eStatus & wxODChecked) != 0) : TRUE));
418
419 if (vBmp.Ok())
420 {
421
422 wxMemoryDC vDCMem(&rDC);
423 wxMemoryDC* pOldDC = (wxMemoryDC*)vBmp.GetSelectedInto();
424
425 if(pOldDC != NULL)
426 {
427 vBmp.SetSelectedInto(NULL);
428 }
429 vDCMem.SelectObject(vBmp);
430
431 //
432 // Center bitmap
433 //
434 int nBmpWidth = vBmp.GetWidth();
435 int nBmpHeight = vBmp.GetHeight();
436
437 //
438 // There should be enough space!
439 //
440 wxASSERT((nBmpWidth <= rRect.width) && (nBmpHeight <= rRect.height));
441
442 int nHeightDiff = m_nHeight - nBmpHeight;
443
444 rDC.Blit( rRect.x + (GetMarginWidth() - nBmpWidth) / 2
445 ,rRect.y + nHeightDiff / 2
446 ,nBmpWidth
447 ,nBmpHeight
448 ,&vDCMem
449 ,0
450 ,0
451 ,wxCOPY
452 ,true
453 );
454
455 if (eStatus & wxODSelected)
456 {
457 POINTL vPnt1 = {rRect.x + 1, rRect.y + 3}; // Leave a little background border
458 POINTL vPnt2 = {rRect.x + GetMarginWidth(), rRect.y + m_nHeight - 3};
459
460 LINEBUNDLE vLine;
461
462 vLine.lColor = vColBack.GetPixel();
463 ::GpiSetAttrs( hPS
464 ,PRIM_LINE
465 ,LBB_COLOR
466 ,0
467 ,&vLine
468 );
469 ::GpiMove(hPS, &vPnt1);
470 ::GpiBox( hPS
471 ,DRO_OUTLINE
472 ,&vPnt2
473 ,0L
474 ,0L
475 );
476 }
477 vBmp.SetSelectedInto(NULL);
478 }
479 }
480 return true;
481 } // end of wxOwnerDrawn::OnDrawItem
482
483 #endif //wxUSE_OWNER_DRAWN
wxWidgets (Impactor)