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fix memory leak (coverity checker CID 53)
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1/////////////////////////////////////////////////////////////////////////////
2// Name: cursor.cpp
3// Purpose:
4// Author: Robert Roebling
5// Id: $Id$
6// Copyright: (c) 1998 Robert Roebling
7// Licence: wxWindows licence
8/////////////////////////////////////////////////////////////////////////////
9
10// For compilers that support precompilation, includes "wx.h".
11#include "wx/wxprec.h"
12
13#include "wx/cursor.h"
14#include "wx/utils.h"
15#include "wx/app.h"
16
17#include <gdk/gdk.h>
18#include <gtk/gtk.h>
19
20//-----------------------------------------------------------------------------
21// idle system
22//-----------------------------------------------------------------------------
23
24extern void wxapp_install_idle_handler();
25extern bool g_isIdle;
26
27//-----------------------------------------------------------------------------
28// wxCursor
29//-----------------------------------------------------------------------------
30
31class wxCursorRefData: public wxObjectRefData
32{
33 public:
34
35 wxCursorRefData();
36 ~wxCursorRefData();
37
38 GdkCursor *m_cursor;
39};
40
41wxCursorRefData::wxCursorRefData()
42{
43 m_cursor = (GdkCursor *) NULL;
44}
45
46wxCursorRefData::~wxCursorRefData()
47{
48 if (m_cursor) gdk_cursor_destroy( m_cursor );
49}
50
51//-----------------------------------------------------------------------------
52
53#define M_CURSORDATA ((wxCursorRefData *)m_refData)
54
55IMPLEMENT_DYNAMIC_CLASS(wxCursor,wxObject)
56
57wxCursor::wxCursor()
58{
59
60}
61
62wxCursor::wxCursor( int cursorId )
63{
64 m_refData = new wxCursorRefData();
65
66 GdkCursorType gdk_cur = GDK_LEFT_PTR;
67 switch (cursorId)
68 {
69 case wxCURSOR_BLANK:
70 {
71 static const gchar bits[] = { 0 };
72 static /* const -- not in GTK1 */ GdkColor color = { 0, 0, 0, 0 };
73
74 GdkPixmap *pixmap = gdk_bitmap_create_from_data(NULL, bits, 1, 1);
75 M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap(pixmap,
76 pixmap,
77 &color,
78 &color,
79 0, 0);
80 }
81 return;
82
83 case wxCURSOR_ARROW: // fall through to default
84 case wxCURSOR_DEFAULT: gdk_cur = GDK_LEFT_PTR; break;
85 case wxCURSOR_RIGHT_ARROW: gdk_cur = GDK_RIGHT_PTR; break;
86 case wxCURSOR_HAND: gdk_cur = GDK_HAND1; break;
87 case wxCURSOR_CROSS: gdk_cur = GDK_CROSSHAIR; break;
88 case wxCURSOR_SIZEWE: gdk_cur = GDK_SB_H_DOUBLE_ARROW; break;
89 case wxCURSOR_SIZENS: gdk_cur = GDK_SB_V_DOUBLE_ARROW; break;
90 case wxCURSOR_ARROWWAIT:
91 case wxCURSOR_WAIT:
92 case wxCURSOR_WATCH: gdk_cur = GDK_WATCH; break;
93 case wxCURSOR_SIZING: gdk_cur = GDK_SIZING; break;
94 case wxCURSOR_SPRAYCAN: gdk_cur = GDK_SPRAYCAN; break;
95 case wxCURSOR_IBEAM: gdk_cur = GDK_XTERM; break;
96 case wxCURSOR_PENCIL: gdk_cur = GDK_PENCIL; break;
97 case wxCURSOR_NO_ENTRY: gdk_cur = GDK_PIRATE; break;
98 case wxCURSOR_SIZENWSE:
99 case wxCURSOR_SIZENESW: gdk_cur = GDK_FLEUR; break;
100 case wxCURSOR_QUESTION_ARROW: gdk_cur = GDK_QUESTION_ARROW; break;
101 case wxCURSOR_PAINT_BRUSH: gdk_cur = GDK_SPRAYCAN; break;
102 case wxCURSOR_MAGNIFIER: gdk_cur = GDK_PLUS; break;
103 case wxCURSOR_CHAR: gdk_cur = GDK_XTERM; break;
104 case wxCURSOR_LEFT_BUTTON: gdk_cur = GDK_LEFTBUTTON; break;
105 case wxCURSOR_MIDDLE_BUTTON: gdk_cur = GDK_MIDDLEBUTTON; break;
106 case wxCURSOR_RIGHT_BUTTON: gdk_cur = GDK_RIGHTBUTTON; break;
107 case wxCURSOR_BULLSEYE: gdk_cur = GDK_TARGET; break;
108
109 case wxCURSOR_POINT_LEFT: gdk_cur = GDK_SB_LEFT_ARROW; break;
110 case wxCURSOR_POINT_RIGHT: gdk_cur = GDK_SB_RIGHT_ARROW; break;
111/*
112 case wxCURSOR_DOUBLE_ARROW: gdk_cur = GDK_DOUBLE_ARROW; break;
113 case wxCURSOR_CROSS_REVERSE: gdk_cur = GDK_CROSS_REVERSE; break;
114 case wxCURSOR_BASED_ARROW_UP: gdk_cur = GDK_BASED_ARROW_UP; break;
115 case wxCURSOR_BASED_ARROW_DOWN: gdk_cur = GDK_BASED_ARROW_DOWN; break;
116*/
117
118 default:
119 wxFAIL_MSG(wxT("unsupported cursor type"));
120 // will use the standard one
121 break;
122 }
123
124 M_CURSORDATA->m_cursor = gdk_cursor_new( gdk_cur );
125}
126
127extern GtkWidget *wxGetRootWindow();
128
129wxCursor::wxCursor(const char bits[], int width, int height,
130 int hotSpotX, int hotSpotY,
131 const char maskBits[], wxColour *fg, wxColour *bg)
132{
133 if (!maskBits)
134 maskBits = bits;
135 if (!fg)
136 fg = wxBLACK;
137 if (!bg)
138 bg = wxWHITE;
139 if (hotSpotX < 0 || hotSpotX >= width)
140 hotSpotX = 0;
141 if (hotSpotY < 0 || hotSpotY >= height)
142 hotSpotY = 0;
143
144 GdkBitmap *data = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) bits, width, height );
145 GdkBitmap *mask = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) maskBits, width, height);
146
147 m_refData = new wxCursorRefData;
148 M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap(
149 data, mask, fg->GetColor(), bg->GetColor(),
150 hotSpotX, hotSpotY );
151
152 gdk_bitmap_unref( data );
153 gdk_bitmap_unref( mask );
154}
155
156#if wxUSE_IMAGE
157
158wxCursor::wxCursor( const wxImage & image )
159{
160 unsigned char * rgbBits = image.GetData();
161 int w = image.GetWidth() ;
162 int h = image.GetHeight();
163 bool bHasMask = image.HasMask();
164 int imagebitcount = (w*h)/8;
165
166 unsigned char * bits = new unsigned char [imagebitcount];
167 unsigned char * maskBits = new unsigned char [imagebitcount];
168
169 int i, j, i8; unsigned char c, cMask;
170 for (i=0; i<imagebitcount; i++)
171 {
172 bits[i] = 0;
173 i8 = i * 8;
174
175 cMask = 1;
176 for (j=0; j<8; j++)
177 {
178 // possible overflow if we do the summation first ?
179 c = rgbBits[(i8+j)*3]/3 + rgbBits[(i8+j)*3+1]/3 + rgbBits[(i8+j)*3+2]/3;
180 //if average value is > mid grey
181 if (c>127)
182 bits[i] = bits[i] | cMask;
183 cMask = cMask * 2;
184 }
185 }
186
187 unsigned long keyMaskColor;
188 if (bHasMask)
189 {
190 unsigned char
191 r = image.GetMaskRed(),
192 g = image.GetMaskGreen(),
193 b = image.GetMaskBlue();
194
195 for (i=0; i<imagebitcount; i++)
196 {
197 maskBits[i] = 0x0;
198 i8 = i * 8;
199
200 cMask = 1;
201 for (j=0; j<8; j++)
202 {
203 if (rgbBits[(i8+j)*3] != r || rgbBits[(i8+j)*3+1] != g || rgbBits[(i8+j)*3+2] != b)
204 maskBits[i] = maskBits[i] | cMask;
205 cMask = cMask * 2;
206 }
207 }
208
209 keyMaskColor = (r << 16) | (g << 8) | b;
210 }
211 else // no mask
212 {
213 for (i=0; i<imagebitcount; i++)
214 maskBits[i] = 0xFF;
215
216 // init it to avoid compiler warnings
217 keyMaskColor = 0;
218 }
219
220 // find the most frequent color(s)
221 wxImageHistogram histogram;
222 image.ComputeHistogram(histogram);
223
224 // colors as rrggbb
225 unsigned long key;
226 unsigned long value;
227
228 long colMostFreq = 0;
229 unsigned long nMost = 0;
230 long colNextMostFreq = 0;
231 unsigned long nNext = 0;
232 for ( wxImageHistogram::iterator entry = histogram.begin();
233 entry != histogram.end();
234 ++entry )
235 {
236 value = entry->second.value;
237 key = entry->first;
238 if ( !bHasMask || (key != keyMaskColor) )
239 {
240 if (value > nMost)
241 {
242 nMost = value;
243 colMostFreq = key;
244 }
245 else if (value > nNext)
246 {
247 nNext = value;
248 colNextMostFreq = key;
249 }
250 }
251 }
252
253 wxColour fg = wxColour ( (unsigned char)(colMostFreq >> 16),
254 (unsigned char)(colMostFreq >> 8),
255 (unsigned char)(colMostFreq) );
256
257 wxColour bg = wxColour ( (unsigned char)(colNextMostFreq >> 16),
258 (unsigned char)(colNextMostFreq >> 8),
259 (unsigned char)(colNextMostFreq) );
260
261 int fg_intensity = fg.Red() + fg.Green() + fg.Blue();
262 int bg_intensity = bg.Red() + bg.Green() + bg.Blue();
263
264 if (bg_intensity > fg_intensity)
265 {
266 //swap fg and bg
267 wxColour tmp = fg;
268 fg = bg;
269 bg = tmp;
270 }
271
272 int hotSpotX;
273 int hotSpotY;
274
275 if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X))
276 hotSpotX = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X);
277 else
278 hotSpotX = 0;
279
280 if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y))
281 hotSpotY = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y);
282 else
283 hotSpotY = 0;
284
285 if (hotSpotX < 0 || hotSpotX >= w)
286 hotSpotX = 0;
287 if (hotSpotY < 0 || hotSpotY >= h)
288 hotSpotY = 0;
289
290 GdkBitmap *data = gdk_bitmap_create_from_data(wxGetRootWindow()->window,
291 (gchar *) bits, w, h);
292 GdkBitmap *mask = gdk_bitmap_create_from_data(wxGetRootWindow()->window,
293 (gchar *) maskBits, w, h);
294
295 m_refData = new wxCursorRefData;
296 M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap
297 (
298 data,
299 mask,
300 fg.GetColor(), bg.GetColor(),
301 hotSpotX, hotSpotY
302 );
303
304 gdk_bitmap_unref( data );
305 gdk_bitmap_unref( mask );
306 delete [] bits;
307 delete [] maskBits;
308}
309
310#endif // wxUSE_IMAGE
311
312wxCursor::~wxCursor()
313{
314}
315
316bool wxCursor::operator == ( const wxCursor& cursor ) const
317{
318 return m_refData == cursor.m_refData;
319}
320
321bool wxCursor::operator != ( const wxCursor& cursor ) const
322{
323 return m_refData != cursor.m_refData;
324}
325
326bool wxCursor::Ok() const
327{
328 return (m_refData != NULL);
329}
330
331GdkCursor *wxCursor::GetCursor() const
332{
333 return M_CURSORDATA->m_cursor;
334}
335
336//-----------------------------------------------------------------------------
337// busy cursor routines
338//-----------------------------------------------------------------------------
339
340extern wxCursor g_globalCursor;
341
342static wxCursor gs_savedCursor;
343static int gs_busyCount = 0;
344
345const wxCursor &wxBusyCursor::GetStoredCursor()
346{
347 return gs_savedCursor;
348}
349
350const wxCursor wxBusyCursor::GetBusyCursor()
351{
352 return wxCursor(wxCURSOR_WATCH);
353}
354
355void wxEndBusyCursor()
356{
357 if (--gs_busyCount > 0)
358 return;
359
360 wxSetCursor( gs_savedCursor );
361 gs_savedCursor = wxNullCursor;
362
363 if (wxTheApp)
364 wxTheApp->ProcessIdle();
365}
366
367void wxBeginBusyCursor( wxCursor *WXUNUSED(cursor) )
368{
369 if (gs_busyCount++ > 0)
370 return;
371
372 wxASSERT_MSG( !gs_savedCursor.Ok(),
373 wxT("forgot to call wxEndBusyCursor, will leak memory") );
374
375 gs_savedCursor = g_globalCursor;
376
377 wxSetCursor( wxCursor(wxCURSOR_WATCH) );
378
379 if (wxTheApp)
380 wxTheApp->ProcessIdle();
381
382 gdk_flush();
383}
384
385bool wxIsBusy()
386{
387 return gs_busyCount > 0;
388}
389
390void wxSetCursor( const wxCursor& cursor )
391{
392 if (g_isIdle)
393 wxapp_install_idle_handler();
394
395 g_globalCursor = cursor;
396}