Tweak themes for more color consistency.
[ntk.git] / src / fl_dnd_win32.cxx
blob48cd9c5cba96c49fd7f399b5b698c60e548b9b7e
1 //
2 // "$Id: fl_dnd_win32.cxx 8028 2010-12-14 19:46:55Z AlbrechtS $"
3 //
4 // Drag & Drop code for the Fast Light Tool Kit (FLTK).
5 //
6 // Copyright 1998-2010 by Bill Spitzak and others.
7 //
8 // This library is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU Library General Public
10 // License as published by the Free Software Foundation; either
11 // version 2 of the License, or (at your option) any later version.
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // Library General Public License for more details.
18 // You should have received a copy of the GNU Library General Public
19 // License along with this library; if not, write to the Free Software
20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21 // USA.
23 // Please report all bugs and problems on the following page:
25 // http://www.fltk.org/str.php
27 // This file contains win32-specific code for fltk which is always linked
28 // in. Search other files for "WIN32" or filenames ending in _win32.cxx
29 // for other system-specific code.
31 #include <FL/Fl.H>
32 #include <FL/x.H>
33 #include <FL/Fl_Window.H>
34 #include <FL/fl_utf8.h>
35 #include "flstring.h"
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <sys/types.h>
39 #include <objidl.h>
40 #include <time.h>
41 #if defined(__CYGWIN__)
42 #include <sys/time.h>
43 #include <unistd.h>
44 #endif
46 extern char *fl_selection_buffer[2];
47 extern int fl_selection_length[2];
48 extern int fl_selection_buffer_length[2];
49 extern char fl_i_own_selection[2];
50 extern char *fl_locale2utf8(const char *s, UINT codepage = 0);
51 extern unsigned int fl_codepage;
53 Fl_Window *fl_dnd_target_window = 0;
55 #include <ole2.h>
56 #include <shellapi.h>
57 #include <shlobj.h>
60 /**
61 * subclass the IDropTarget to receive data from DnD operations
63 class FLDropTarget : public IDropTarget
65 DWORD m_cRefCount;
66 DWORD lastEffect;
67 int px, py;
68 public:
69 FLDropTarget() : m_cRefCount(0) { } // initialize
70 HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid, LPVOID *ppvObject ) {
71 if (IID_IUnknown==riid || IID_IDropTarget==riid)
73 *ppvObject=this;
74 ((LPUNKNOWN)*ppvObject)->AddRef();
75 return S_OK;
77 *ppvObject = NULL;
78 return E_NOINTERFACE;
80 ULONG STDMETHODCALLTYPE AddRef() { return ++m_cRefCount; }
81 ULONG STDMETHODCALLTYPE Release() {
82 long nTemp;
83 nTemp = --m_cRefCount;
84 if(nTemp==0)
85 delete this;
86 return nTemp;
88 HRESULT STDMETHODCALLTYPE DragEnter( IDataObject *pDataObj, DWORD /*grfKeyState*/, POINTL pt, DWORD *pdwEffect) {
89 if( !pDataObj ) return E_INVALIDARG;
90 // set e_modifiers here from grfKeyState, set e_x and e_root_x
91 // check if FLTK handles this drag and return if it can't (i.e. BMP drag without filename)
92 POINT ppt;
93 Fl::e_x_root = ppt.x = pt.x;
94 Fl::e_y_root = ppt.y = pt.y;
95 HWND hWnd = WindowFromPoint( ppt );
96 Fl_Window *target = fl_find( hWnd );
97 if (target) {
98 Fl::e_x = Fl::e_x_root-target->x();
99 Fl::e_y = Fl::e_y_root-target->y();
101 fl_dnd_target_window = target;
102 px = pt.x; py = pt.y;
103 if (fillCurrentDragData(pDataObj)) {
104 // FLTK has no mechanism yet for the different drop effects, so we allow move and copy
105 if ( target && Fl::handle( FL_DND_ENTER, target ) )
106 *pdwEffect = DROPEFFECT_MOVE|DROPEFFECT_COPY; //|DROPEFFECT_LINK;
107 else
108 *pdwEffect = DROPEFFECT_NONE;
109 } else {
110 *pdwEffect = DROPEFFECT_NONE;
112 lastEffect = *pdwEffect;
113 return S_OK;
115 HRESULT STDMETHODCALLTYPE DragOver( DWORD /*grfKeyState*/, POINTL pt, DWORD *pdwEffect) {
116 if ( px==pt.x && py==pt.y )
118 *pdwEffect = lastEffect;
119 return S_OK;
121 if ( !fl_dnd_target_window )
123 *pdwEffect = lastEffect = DROPEFFECT_NONE;
124 return S_OK;
126 // set e_modifiers here from grfKeyState, set e_x and e_root_x
127 Fl::e_x_root = pt.x;
128 Fl::e_y_root = pt.y;
129 if (fl_dnd_target_window) {
130 Fl::e_x = Fl::e_x_root-fl_dnd_target_window->x();
131 Fl::e_y = Fl::e_y_root-fl_dnd_target_window->y();
133 if (fillCurrentDragData(0)) {
134 // Fl_Group will change DND_DRAG into DND_ENTER and DND_LEAVE if needed
135 if ( Fl::handle( FL_DND_DRAG, fl_dnd_target_window ) )
136 *pdwEffect = DROPEFFECT_MOVE|DROPEFFECT_COPY; //|DROPEFFECT_LINK;
137 else
138 *pdwEffect = DROPEFFECT_NONE;
139 } else {
140 *pdwEffect = DROPEFFECT_NONE;
142 px = pt.x; py = pt.y;
143 lastEffect = *pdwEffect;
144 return S_OK;
146 HRESULT STDMETHODCALLTYPE DragLeave() {
147 if ( fl_dnd_target_window && fillCurrentDragData(0))
149 Fl::handle( FL_DND_LEAVE, fl_dnd_target_window );
150 fl_dnd_target_window = 0;
151 clearCurrentDragData();
153 return S_OK;
155 HRESULT STDMETHODCALLTYPE Drop( IDataObject *data, DWORD /*grfKeyState*/, POINTL pt, DWORD* /*pdwEffect*/) {
156 if ( !fl_dnd_target_window )
157 return S_OK;
158 Fl_Window *target = fl_dnd_target_window;
159 fl_dnd_target_window = 0;
160 Fl::e_x_root = pt.x;
161 Fl::e_y_root = pt.y;
162 if (target) {
163 Fl::e_x = Fl::e_x_root-target->x();
164 Fl::e_y = Fl::e_y_root-target->y();
166 // tell FLTK that the user released an object on this widget
167 if ( !Fl::handle( FL_DND_RELEASE, target ) )
168 return S_OK;
170 Fl_Widget *w = target;
171 while (w->parent()) w = w->window();
172 HWND hwnd = fl_xid( (Fl_Window*)w );
173 if (fillCurrentDragData(data)) {
174 int old_event = Fl::e_number;
175 char *a, *b;
176 a = b = currDragData;
177 while (*a) { // strip the CRLF pairs
178 if (*a == '\r' && a[1] == '\n') a++;
179 else *b++ = *a++;
181 *b = 0;
182 Fl::e_text = currDragData;
183 Fl::e_length = b - currDragData;
184 Fl::belowmouse()->handle(Fl::e_number = FL_PASTE); // e_text will be invalid after this call
185 Fl::e_number = old_event;
186 SetForegroundWindow( hwnd );
187 clearCurrentDragData();
188 return S_OK;
190 return S_OK;
192 private:
194 static IDataObject *currDragRef;
195 static char *currDragData;
196 static int currDragSize;
197 static char currDragResult;
199 static void clearCurrentDragData() {
200 currDragRef = 0;
201 if (currDragData) free(currDragData);
202 currDragData = 0;
203 currDragSize = 0;
204 currDragResult = 0;
206 static char fillCurrentDragData(IDataObject *data) {
207 // shortcut through this whole procedure if there is no fresh data
208 if (!data)
209 return currDragResult;
210 // shortcut through this whole procedure if this is still the same drag event
211 // (* this is safe, because 'currDragRef' is cleared on Leave and Drop events)
212 if (data==currDragRef)
213 return currDragResult;
215 // clear currDrag* for a new drag event
216 clearCurrentDragData();
218 currDragRef = data;
219 // fill currDrag* with UTF-8 data, if available
220 FORMATETC fmt = { 0 };
221 STGMEDIUM medium = { 0 };
222 fmt.tymed = TYMED_HGLOBAL;
223 fmt.dwAspect = DVASPECT_CONTENT;
224 fmt.lindex = -1;
225 fmt.cfFormat = CF_UNICODETEXT;
226 // if it is UNICODE text, return a UTF-8-converted copy of it
227 if ( data->GetData( &fmt, &medium )==S_OK )
229 void *stuff = GlobalLock( medium.hGlobal );
230 unsigned srclen = 0;
231 const wchar_t *wstuff = (const wchar_t *)stuff;
232 while (*wstuff++) srclen++;
233 wstuff = (const wchar_t *)stuff;
234 unsigned utf8len = fl_utf8fromwc(NULL, 0, wstuff, srclen);
235 currDragSize = utf8len;
236 currDragData = (char*)malloc(utf8len + 1);
237 fl_utf8fromwc(currDragData, currDragSize+1, wstuff, srclen+1); // include null-byte
238 GlobalUnlock( medium.hGlobal );
239 ReleaseStgMedium( &medium );
240 currDragResult = 1;
241 return currDragResult;
243 fmt.cfFormat = CF_TEXT;
244 // if it is CP1252 text, return a UTF-8-converted copy of it
245 if ( data->GetData( &fmt, &medium )==S_OK )
247 int len;
248 char *p, *q, *last;
249 unsigned u;
250 void *stuff = GlobalLock( medium.hGlobal );
251 currDragData = (char*)malloc(3 * strlen((char*)stuff) + 10);
252 p = (char*)stuff;
253 last = p + strlen(p);
254 q = currDragData;
255 while (p < last) {
256 u = fl_utf8decode(p, last, &len);
257 p += len;
258 len = fl_utf8encode(u, q);
259 q += len;
261 *q = 0;
262 currDragSize = q - currDragData;
263 currDragData = (char*)realloc(currDragData, currDragSize + 1);
264 GlobalUnlock( medium.hGlobal );
265 ReleaseStgMedium( &medium );
266 currDragResult = 1;
267 return currDragResult;
269 // else fill currDrag* with filenames, if possible
270 memset(&fmt, 0, sizeof(fmt));
271 fmt.tymed = TYMED_HGLOBAL;
272 fmt.dwAspect = DVASPECT_CONTENT;
273 fmt.lindex = -1;
274 fmt.cfFormat = CF_HDROP;
275 // if it is a pathname list, send an FL_PASTE with a \n separated list of filepaths
276 if ( data->GetData( &fmt, &medium )==S_OK )
278 HDROP hdrop = (HDROP)medium.hGlobal;
279 int i, n, nn = 0, nf = DragQueryFileW( hdrop, (UINT)-1, 0, 0 );
280 for ( i=0; i<nf; i++ ) nn += DragQueryFileW( hdrop, i, 0, 0 );
281 nn += nf;
282 xchar *dst = (xchar *)malloc(nn * sizeof(xchar));
283 xchar *bu = dst;
284 for ( i=0; i<nf; i++ ) {
285 n = DragQueryFileW( hdrop, i, (WCHAR*)dst, nn );
286 dst += n;
287 if ( i<nf-1 ) {
288 *dst++ = L'\n';
291 *dst=0;
293 currDragData = (char*) malloc(nn * 5 + 1);
294 // Fl::e_length = fl_unicode2utf(bu, nn, Fl::e_text);
295 currDragSize = fl_utf8fromwc(currDragData, (nn*5+1), bu, nn);
296 currDragData[currDragSize] = 0;
297 free(bu);
299 // Fl::belowmouse()->handle(FL_DROP);
300 // free( Fl::e_text );
301 ReleaseStgMedium( &medium );
302 currDragResult = 1;
303 return currDragResult;
305 currDragResult = 0;
306 return currDragResult;
308 } flDropTarget;
310 IDropTarget *flIDropTarget = &flDropTarget;
312 IDataObject *FLDropTarget::currDragRef = 0;
313 char *FLDropTarget::currDragData = 0;
314 int FLDropTarget::currDragSize = 0;
315 char FLDropTarget::currDragResult = 0;
318 * this class is needed to allow FLTK apps to be a DnD source
320 class FLDropSource : public IDropSource
322 DWORD m_cRefCount;
323 public:
324 FLDropSource() { m_cRefCount = 0; }
325 HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid, LPVOID *ppvObject ) {
326 if (IID_IUnknown==riid || IID_IDropSource==riid)
328 *ppvObject=this;
329 ((LPUNKNOWN)*ppvObject)->AddRef();
330 return S_OK;
332 *ppvObject = NULL;
333 return E_NOINTERFACE;
335 ULONG STDMETHODCALLTYPE AddRef() { return ++m_cRefCount; }
336 ULONG STDMETHODCALLTYPE Release() {
337 long nTemp;
338 nTemp = --m_cRefCount;
339 if(nTemp==0)
340 delete this;
341 return nTemp;
343 STDMETHODIMP GiveFeedback( ulong ) { return DRAGDROP_S_USEDEFAULTCURSORS; }
344 STDMETHODIMP QueryContinueDrag( BOOL esc, DWORD keyState ) {
345 if ( esc )
346 return DRAGDROP_S_CANCEL;
347 if ( !(keyState & (MK_LBUTTON|MK_MBUTTON|MK_RBUTTON)) )
348 return DRAGDROP_S_DROP;
349 return S_OK;
352 class FLEnum : public IEnumFORMATETC
354 public:
355 int n;
356 LONG m_lRefCount;
358 ULONG __stdcall AddRef(void) {
359 return InterlockedIncrement(&m_lRefCount);
362 ULONG __stdcall Release(void) {
363 LONG count = InterlockedDecrement(&m_lRefCount);
364 if(count == 0) {
365 delete this;
366 return 0;
367 } else {
368 return count;
373 HRESULT __stdcall QueryInterface(REFIID iid, void **ppvObject) {
374 if(iid == IID_IEnumFORMATETC || iid == IID_IUnknown) {
375 AddRef();
376 *ppvObject = this;
377 return S_OK;
378 } else {
379 *ppvObject = 0;
380 return E_NOINTERFACE;
384 HRESULT __stdcall Next(ULONG celt, FORMATETC * rgelt, ULONG *pceltFetched) {
385 if (n > 0) return S_FALSE;
386 for (ULONG i = 0; i < celt; i++) {
387 n++;
388 rgelt->cfFormat = CF_HDROP;
389 rgelt->dwAspect = DVASPECT_CONTENT;
390 rgelt->lindex = -1;
391 rgelt->ptd = NULL;
392 rgelt->tymed = TYMED_HGLOBAL;
394 if (pceltFetched) *pceltFetched = celt;
395 return S_OK;
398 HRESULT __stdcall Skip(ULONG celt) {
399 n += celt;
400 return (n == 0) ? S_OK : S_FALSE;
403 HRESULT __stdcall Reset(void) {
404 n = 0;
405 return S_OK;
408 HRESULT __stdcall Clone(IEnumFORMATETC **ppenum){
409 *ppenum = new FLEnum();
410 return S_OK;
413 FLEnum(void) {
414 m_lRefCount = 1;
415 n = 0;
418 virtual ~FLEnum(void) {
419 n = 0;
425 This is the actual object that FLTK can drop somewhere.
427 The implementation is minimal, but it should work with all decent Win32 drop targets
429 class FLDataObject : public IDataObject
431 DWORD m_cRefCount;
432 FLEnum *m_EnumF;
433 public:
434 FLDataObject() { m_cRefCount = 1; }// m_EnumF = new FLEnum();}
435 HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid, LPVOID *ppvObject ) {
436 if (IID_IUnknown==riid || IID_IDataObject==riid)
438 *ppvObject=this;
439 ((LPUNKNOWN)*ppvObject)->AddRef();
440 return S_OK;
442 *ppvObject = NULL;
443 return E_NOINTERFACE;
445 ULONG STDMETHODCALLTYPE AddRef() { return ++m_cRefCount; }
446 ULONG STDMETHODCALLTYPE Release() {
447 long nTemp;
448 nTemp = --m_cRefCount;
449 if(nTemp==0)
450 delete this;
451 return nTemp;
453 // GetData currently allows UNICODE text through Global Memory only
454 HRESULT STDMETHODCALLTYPE GetData( FORMATETC *pformatetcIn, STGMEDIUM *pmedium ) {
455 if ((pformatetcIn->dwAspect & DVASPECT_CONTENT) &&
456 (pformatetcIn->tymed & TYMED_HGLOBAL) &&
457 (pformatetcIn->cfFormat == CF_UNICODETEXT))
459 int utf16_len = fl_utf8toUtf16(fl_selection_buffer[0], fl_selection_length[0], 0, 0);
460 HGLOBAL gh = GlobalAlloc( GHND, utf16_len * 2 + 2 );
461 char *pMem = (char*)GlobalLock( gh );
462 fl_utf8toUtf16(fl_selection_buffer[0], fl_selection_length[0], (unsigned short*)pMem, utf16_len + 1);
463 // HGLOBAL gh = GlobalAlloc( GHND| GMEM_SHARE,
464 // (fl_selection_length[0]+4) * sizeof(short)
465 // + sizeof(DROPFILES));
466 // unsigned char *pMem = (unsigned char*)GlobalLock( gh );
467 // if (!pMem) {
468 // GlobalFree(gh);
469 // return DV_E_FORMATETC;
470 // }
471 // DROPFILES *df =(DROPFILES*) pMem;
472 // int l;
473 // df->pFiles = sizeof(DROPFILES);
474 // df->pt.x = 0;
475 // df->pt.y = 0;
476 // df->fNC = FALSE;
477 // for (int i = 0; i < fl_selection_length[0]; i++) {
478 // if (fl_selection_buffer[0][i] == '\n') {
479 // fl_selection_buffer[0][i] = '\0';
480 // }
481 // }
483 // df->fWide = TRUE;
484 // l = fl_utf2unicode((unsigned char*)fl_selection_buffer[0],
485 // fl_selection_length[0], (xchar*)(((char*)pMem)
486 // + sizeof(DROPFILES)));
488 // pMem[l * sizeof(WCHAR) + sizeof(DROPFILES)] = 0;
489 // pMem[l * sizeof(WCHAR) + 1 + sizeof(DROPFILES)] = 0;
490 // pMem[l * sizeof(WCHAR) + 2 + sizeof(DROPFILES)] = 0;
491 // pMem[l * sizeof(WCHAR) + 3 + sizeof(DROPFILES)] = 0;
492 pmedium->tymed = TYMED_HGLOBAL;
493 pmedium->hGlobal = gh;
494 pmedium->pUnkForRelease = NULL;
495 GlobalUnlock( gh );
496 return S_OK;
498 return DV_E_FORMATETC;
500 HRESULT STDMETHODCALLTYPE QueryGetData( FORMATETC *pformatetc )
502 if ((pformatetc->dwAspect & DVASPECT_CONTENT) &&
503 (pformatetc->tymed & TYMED_HGLOBAL) &&
504 (pformatetc->cfFormat == CF_UNICODETEXT))
505 return S_OK;
506 return DV_E_FORMATETC;
508 // HRESULT STDMETHODCALLTYPE EnumFormatEtc( DWORD dir, IEnumFORMATETC** ppenumFormatEtc) {
509 // *ppenumFormatEtc = m_EnumF;
510 // return S_OK;
511 // }
513 // all the following methods are not really needed for a DnD object
514 HRESULT STDMETHODCALLTYPE GetDataHere( FORMATETC* /*pformatetcIn*/, STGMEDIUM* /*pmedium*/) { return E_NOTIMPL; }
515 HRESULT STDMETHODCALLTYPE GetCanonicalFormatEtc( FORMATETC* /*in*/, FORMATETC* /*out*/) { return E_NOTIMPL; }
516 HRESULT STDMETHODCALLTYPE SetData( FORMATETC* /*pformatetc*/, STGMEDIUM* /*pmedium*/, BOOL /*fRelease*/) { return E_NOTIMPL; }
517 HRESULT STDMETHODCALLTYPE EnumFormatEtc( DWORD /*dir*/, IEnumFORMATETC** /*ppenumFormatEtc*/) { return E_NOTIMPL; }
518 // HRESULT STDMETHODCALLTYPE EnumFormatEtc( DWORD dir, IEnumFORMATETC** ppenumFormatEtc) {*ppenumFormatEtc = m_EnumF; return S_OK;}
519 HRESULT STDMETHODCALLTYPE DAdvise( FORMATETC* /*pformatetc*/, DWORD /*advf*/,
520 IAdviseSink* /*pAdvSink*/, DWORD* /*pdwConnection*/) { return E_NOTIMPL; }
521 HRESULT STDMETHODCALLTYPE DUnadvise( DWORD /*dwConnection*/) { return E_NOTIMPL; }
522 HRESULT STDMETHODCALLTYPE EnumDAdvise( IEnumSTATDATA** /*ppenumAdvise*/) { return E_NOTIMPL; }
526 int Fl::dnd()
528 DWORD dropEffect;
529 ReleaseCapture();
531 FLDataObject *fdo = new FLDataObject;
532 fdo->AddRef();
533 FLDropSource *fds = new FLDropSource;
534 fds->AddRef();
536 HRESULT ret = DoDragDrop( fdo, fds, DROPEFFECT_MOVE|DROPEFFECT_LINK|DROPEFFECT_COPY, &dropEffect );
538 fdo->Release();
539 fds->Release();
541 Fl_Widget *w = Fl::pushed();
542 if ( w )
544 int old_event = Fl::e_number;
545 w->handle(Fl::e_number = FL_RELEASE);
546 Fl::e_number = old_event;
547 Fl::pushed( 0 );
549 if ( ret==DRAGDROP_S_DROP ) return 1; // or DD_S_CANCEL
550 return 0;
554 // End of "$Id: fl_dnd_win32.cxx 8028 2010-12-14 19:46:55Z AlbrechtS $".