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[reactos.git] / reactos / subsys / system / explorer / desktop / desktop.cpp
1 /*
2 * Copyright 2003, 2004, 2005 Martin Fuchs
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19
20 //
21 // Explorer clone
22 //
23 // desktop.cpp
24 //
25 // Martin Fuchs, 09.08.2003
26 //
27
28
29 #include "precomp.h"
30
31 #include "../explorer_intres.h"
32
33 #include "../taskbar/desktopbar.h"
34 #include "../taskbar/taskbar.h" // for PM_GET_LAST_ACTIVE
35
36
37 static BOOL (WINAPI*SetShellWindow)(HWND);
38 static BOOL (WINAPI*SetShellWindowEx)(HWND, HWND);
39
40
41 #ifdef _USE_HDESK
42
43 Desktop::Desktop(HDESK hdesktop/*, HWINSTA hwinsta*/)
44 : _hdesktop(hdesktop)
45 // _hwinsta(hwinsta)
46 {
47 }
48
49 Desktop::~Desktop()
50 {
51 if (_hdesktop)
52 CloseDesktop(_hdesktop);
53
54 // if (_hwinsta)
55 // CloseWindowStation(_hwinsta);
56
57 if (_pThread.get()) {
58 _pThread->Stop();
59 _pThread.release();
60 }
61 }
62
63 #endif
64
65
66 Desktops::Desktops()
67 : _current_desktop(0)
68 {
69 }
70
71 Desktops::~Desktops()
72 {
73 // show all hidden windows
74 for(iterator it_dsk=begin(); it_dsk!=end(); ++it_dsk)
75 for(WindowSet::iterator it=it_dsk->_windows.begin(); it!=it_dsk->_windows.end(); ++it)
76 ShowWindowAsync(*it, SW_SHOW);
77 }
78
79 void Desktops::init()
80 {
81 resize(DESKTOP_COUNT);
82
83 #ifdef _USE_HDESK
84 DesktopPtr& desktop = (*this)[0];
85
86 desktop = DesktopPtr(new Desktop(OpenInputDesktop(0, FALSE, DESKTOP_SWITCHDESKTOP)));
87 #endif
88 }
89
90 #ifdef _USE_HDESK
91
92 void Desktops::SwitchToDesktop(int idx)
93 {
94 if (_current_desktop == idx)
95 return;
96
97 DesktopPtr& desktop = (*this)[idx];
98
99 DesktopThread* pThread = NULL;
100
101 if (desktop.get()) {
102 if (desktop->_hdesktop)
103 if (!SwitchDesktop(desktop->_hdesktop))
104 return;
105 } else {
106 FmtString desktop_name(TEXT("Desktop %d"), idx);
107
108 SECURITY_ATTRIBUTES saAttr = {sizeof(SECURITY_ATTRIBUTES), 0, TRUE};
109 /*
110 HWINSTA hwinsta = CreateWindowStation(TEXT("ExplorerWinStation"), 0, GENERIC_ALL, &saAttr);
111
112 if (!SetProcessWindowStation(hwinsta))
113 return;
114 */
115 HDESK hdesktop = CreateDesktop(desktop_name, NULL, NULL, 0, GENERIC_ALL, &saAttr);
116 if (!hdesktop)
117 return;
118
119 desktop = DesktopPtr(new Desktop(hdesktop/*, hwinsta*/));
120
121 pThread = new DesktopThread(*desktop);
122 }
123
124 _current_desktop = idx;
125
126 if (pThread) {
127 desktop->_pThread = DesktopThreadPtr(pThread);
128 pThread->Start();
129 }
130 }
131
132 int DesktopThread::Run()
133 {
134 if (!SetThreadDesktop(_desktop._hdesktop))
135 return -1;
136
137 HDESK hDesk_old = OpenInputDesktop(0, FALSE, DESKTOP_SWITCHDESKTOP);
138
139 if (!SwitchDesktop(_desktop._hdesktop))
140 return -1;
141
142 if (!_desktop._hwndDesktop)
143 _desktop._hwndDesktop = DesktopWindow::Create();
144
145 int ret = Window::MessageLoop();
146
147 SwitchDesktop(hDesk_old);
148
149 return ret;
150 }
151
152 #else // _USE_HDESK
153
154 static BOOL CALLBACK SwitchDesktopEnumFct(HWND hwnd, LPARAM lparam)
155 {
156 WindowSet& windows = *(WindowSet*)lparam;
157
158 if (hwnd!=g_Globals._hwndDesktopBar && hwnd!=g_Globals._hwndDesktop)
159 if (IsWindowVisible(hwnd))
160 windows.insert(hwnd);
161
162 return TRUE;
163 }
164
165 void Desktops::SwitchToDesktop(int idx)
166 {
167 if (_current_desktop == idx)
168 return;
169
170 Desktop& old_desktop = (*this)[_current_desktop];
171 WindowSet& windows = old_desktop._windows;
172 Desktop& desktop = (*this)[idx];
173
174 windows.clear();
175
176 // collect window handles of all other desktops
177 WindowSet other_wnds;
178 for(const_iterator it1=begin(); it1!=end(); ++it1)
179 for(WindowSet::const_iterator it2=it1->_windows.begin(); it2!=it1->_windows.end(); ++it2)
180 other_wnds.insert(*it2);
181
182 // save currently visible application windows
183 EnumWindows(SwitchDesktopEnumFct, (LPARAM)&windows);
184
185 old_desktop._hwndForeground = (HWND)SendMessage(g_Globals._hwndDesktopBar, PM_GET_LAST_ACTIVE, 0, 0);
186
187 // hide all windows of the previous desktop
188 for(WindowSet::iterator it=windows.begin(); it!=windows.end(); ++it)
189 ShowWindowAsync(*it, SW_HIDE);
190
191 // show all windows of the new desktop
192 for(WindowSet::iterator it=desktop._windows.begin(); it!=desktop._windows.end(); ++it)
193 ShowWindowAsync(*it, SW_SHOW);
194
195 if (desktop._hwndForeground)
196 SetForegroundWindow(desktop._hwndForeground);
197
198 // remove the window handles of the other desktops from what we found on the previous desktop
199 for(WindowSet::const_iterator it=other_wnds.begin(); it!=other_wnds.end(); ++it)
200 windows.erase(*it);
201
202 // We don't need to store the window handles of what's now visible the now current desktop.
203 desktop._windows.clear();
204
205 _current_desktop = idx;
206 }
207
208 #endif // _USE_HDESK
209
210
211 static BOOL CALLBACK MinimizeDesktopEnumFct(HWND hwnd, LPARAM lparam)
212 {
213 list<MinimizeStruct>& minimized = *(list<MinimizeStruct>*)lparam;
214
215 if (hwnd!=g_Globals._hwndDesktopBar && hwnd!=g_Globals._hwndDesktop)
216 if (IsWindowVisible(hwnd) && !IsIconic(hwnd)) {
217 RECT rect;
218
219 if (GetWindowRect(hwnd,&rect))
220 if (rect.right>0 && rect.bottom>0 &&
221 rect.right>rect.left && rect.bottom>rect.top) {
222 minimized.push_back(MinimizeStruct(hwnd, GetWindowStyle(hwnd)));
223 ShowWindowAsync(hwnd, SW_MINIMIZE);
224 }
225 }
226
227 return TRUE;
228 }
229
230 /// minimize/restore all windows on the desktop
231 void Desktops::ToggleMinimize()
232 {
233 list<MinimizeStruct>& minimized = (*this)[_current_desktop]._minimized;
234
235 if (minimized.empty()) {
236 EnumWindows(MinimizeDesktopEnumFct, (LPARAM)&minimized);
237 } else {
238 for(list<MinimizeStruct>::const_iterator it=minimized.begin(); it!=minimized.end(); ++it)
239 ShowWindowAsync(it->first, it->second&WS_MAXIMIZE? SW_MAXIMIZE: SW_RESTORE);
240
241 minimized.clear();
242 }
243 }
244
245
246 BOOL IsAnyDesktopRunning()
247 {
248 HINSTANCE hUser32 = GetModuleHandle(TEXT("user32"));
249
250 SetShellWindow = (BOOL(WINAPI*)(HWND)) GetProcAddress(hUser32, "SetShellWindow");
251 SetShellWindowEx = (BOOL(WINAPI*)(HWND,HWND)) GetProcAddress(hUser32, "SetShellWindowEx");
252
253 return GetShellWindow() != 0;
254 }
255
256
257 BackgroundWindow::BackgroundWindow(HWND hwnd)
258 : super(hwnd)
259 {
260 // set background brush for the short moment of displaying the
261 // background color while moving foreground windows
262 SetClassLong(hwnd, GCL_HBRBACKGROUND, COLOR_BACKGROUND+1);
263
264 _display_version = RegGetDWORDValue(HKEY_CURRENT_USER, TEXT("Control Panel\\Desktop"), TEXT("PaintDesktopVersion"), 1);
265 }
266
267 LRESULT BackgroundWindow::WndProc(UINT nmsg, WPARAM wparam, LPARAM lparam)
268 {
269 switch(nmsg) {
270 case WM_ERASEBKGND:
271 DrawDesktopBkgnd((HDC)wparam);
272 return TRUE;
273
274 case WM_MBUTTONDBLCLK:
275 /* Imagelist icons are missing if MainFrame::Create() is called directly from here!
276 explorer_show_frame(SW_SHOWNORMAL); */
277 PostMessage(g_Globals._hwndDesktop, nmsg, wparam, lparam);
278 break;
279
280 case PM_DISPLAY_VERSION:
281 if (lparam || wparam) {
282 DWORD or_mask = wparam;
283 DWORD reset_mask = LOWORD(lparam);
284 DWORD xor_mask = HIWORD(lparam);
285 _display_version = ((_display_version&~reset_mask) | or_mask) ^ xor_mask;
286 RegSetDWORDValue(HKEY_CURRENT_USER, TEXT("Control Panel\\Desktop"), TEXT("PaintDesktopVersion"), _display_version);
287 ///@todo Changing the PaintDesktopVersion-Flag needs a restart of the shell -> display a message box
288 InvalidateRect(_hwnd, NULL, TRUE);
289 }
290 return _display_version;
291
292 default:
293 return super::WndProc(nmsg, wparam, lparam);
294 }
295
296 return 0;
297 }
298
299 void BackgroundWindow::DrawDesktopBkgnd(HDC hdc)
300 {
301 PaintDesktop(hdc);
302
303 /* special solid background
304 HBRUSH bkgndBrush = CreateSolidBrush(RGB(0,32,160)); // dark blue
305 FillRect(hdc, &rect, bkgndBrush);
306 DeleteBrush(bkgndBrush);
307 */
308 }
309
310
311 DesktopWindow::DesktopWindow(HWND hwnd)
312 : super(hwnd)
313 {
314 _pShellView = NULL;
315 }
316
317 DesktopWindow::~DesktopWindow()
318 {
319 if (_pShellView)
320 _pShellView->Release();
321 }
322
323
324 HWND DesktopWindow::Create()
325 {
326 static IconWindowClass wcDesktop(TEXT("Progman"), IDI_REACTOS, CS_DBLCLKS);
327 /* (disabled because of small ugly temporary artefacts when hiding start menu)
328 wcDesktop.hbrBackground = (HBRUSH)(COLOR_BACKGROUND+1); */
329
330 int width = GetSystemMetrics(SM_CXSCREEN);
331 int height = GetSystemMetrics(SM_CYSCREEN);
332
333 HWND hwndDesktop = Window::Create(WINDOW_CREATOR(DesktopWindow),
334 WS_EX_TOOLWINDOW, wcDesktop, TEXT("Program Manager"), WS_POPUP|WS_VISIBLE, //|WS_CLIPCHILDREN for SDI frames
335 0, 0, width, height, 0);
336
337 // work around to display desktop bar in Wine
338 ShowWindow(GET_WINDOW(DesktopWindow, hwndDesktop)->_desktopBar, SW_SHOW);
339
340 // work around for Windows NT, Win 98, ...
341 // Without this the desktop has mysteriously only a size of 800x600 pixels.
342 MoveWindow(hwndDesktop, 0, 0, width, height, TRUE);
343
344 return hwndDesktop;
345 }
346
347
348 LRESULT DesktopWindow::Init(LPCREATESTRUCT pcs)
349 {
350 if (super::Init(pcs))
351 return 1;
352
353 HRESULT hr = GetDesktopFolder()->CreateViewObject(_hwnd, IID_IShellView, (void**)&_pShellView);
354 /* also possible:
355 SFV_CREATE sfv_create;
356
357 sfv_create.cbSize = sizeof(SFV_CREATE);
358 sfv_create.pshf = GetDesktopFolder();
359 sfv_create.psvOuter = NULL;
360 sfv_create.psfvcb = NULL;
361
362 HRESULT hr = SHCreateShellFolderView(&sfv_create, &_pShellView);
363 */
364 HWND hWndView = 0;
365
366 if (SUCCEEDED(hr)) {
367 FOLDERSETTINGS fs;
368
369 fs.ViewMode = FVM_ICON;
370 fs.fFlags = FWF_DESKTOP|FWF_NOCLIENTEDGE|FWF_NOSCROLL|FWF_BESTFITWINDOW|FWF_SNAPTOGRID; //|FWF_AUTOARRANGE;
371
372 ClientRect rect(_hwnd);
373
374 hr = _pShellView->CreateViewWindow(NULL, &fs, this, &rect, &hWndView);
375
376 ///@todo use IShellBrowser::GetViewStateStream() to restore previous view state -> see SHOpenRegStream()
377
378 if (SUCCEEDED(hr)) {
379 g_Globals._hwndShellView = hWndView;
380
381 // subclass shellview window
382 new DesktopShellView(hWndView, _pShellView);
383
384 _pShellView->UIActivate(SVUIA_ACTIVATE_FOCUS);
385
386 /*
387 IShellView2* pShellView2;
388
389 hr = _pShellView->QueryInterface(IID_IShellView2, (void**)&pShellView2);
390
391 SV2CVW2_PARAMS params;
392 params.cbSize = sizeof(SV2CVW2_PARAMS);
393 params.psvPrev = _pShellView;
394 params.pfs = &fs;
395 params.psbOwner = this;
396 params.prcView = &rect;
397 params.pvid = params.pvid;//@@
398
399 hr = pShellView2->CreateViewWindow2(&params);
400 params.pvid;
401 */
402
403 /*
404 IFolderView* pFolderView;
405
406 hr = _pShellView->QueryInterface(IID_IFolderView, (void**)&pFolderView);
407
408 if (SUCCEEDED(hr)) {
409 hr = pFolderView->GetAutoArrange();
410 hr = pFolderView->SetCurrentViewMode(FVM_DETAILS);
411 }
412 */
413 }
414 }
415
416 if (hWndView && SetShellWindowEx)
417 SetShellWindowEx(_hwnd, hWndView);
418 else if (SetShellWindow)
419 SetShellWindow(_hwnd);
420
421 // create the explorer bar
422 _desktopBar = DesktopBar::Create();
423 g_Globals._hwndDesktopBar = _desktopBar;
424
425 return 0;
426 }
427
428
429 LRESULT DesktopWindow::WndProc(UINT nmsg, WPARAM wparam, LPARAM lparam)
430 {
431 switch(nmsg) {
432 case WM_LBUTTONDBLCLK:
433 case WM_RBUTTONDBLCLK:
434 case WM_MBUTTONDBLCLK:
435 explorer_show_frame(SW_SHOWNORMAL);
436 break;
437
438 case WM_GETISHELLBROWSER:
439 return (LRESULT)static_cast<IShellBrowser*>(this);
440
441 case WM_DESTROY:
442
443 ///@todo use IShellBrowser::GetViewStateStream() and _pShellView->SaveViewState() to store view state
444
445 if (SetShellWindow)
446 SetShellWindow(0);
447 break;
448
449 case WM_CLOSE:
450 ShowExitWindowsDialog(_hwnd);
451 break;
452
453 case WM_SYSCOMMAND:
454 if (wparam == SC_TASKLIST) {
455 if (_desktopBar)
456 SendMessage(_desktopBar, nmsg, wparam, lparam);
457 }
458 goto def;
459
460 default: def:
461 return super::WndProc(nmsg, wparam, lparam);
462 }
463
464 return 0;
465 }
466
467
468 HRESULT DesktopWindow::OnDefaultCommand(LPIDA pida)
469 {
470 if (MainFrameBase::OpenShellFolders(pida, 0))
471 return S_OK;
472
473 return E_NOTIMPL;
474 }
475
476
477 DesktopShellView::DesktopShellView(HWND hwnd, IShellView* pShellView)
478 : super(hwnd),
479 _pShellView(pShellView)
480 {
481 _hwndListView = ::GetNextWindow(hwnd, GW_CHILD);
482
483 SetWindowStyle(_hwndListView, GetWindowStyle(_hwndListView)&~LVS_ALIGNMASK);//|LVS_ALIGNTOP|LVS_AUTOARRANGE);
484
485 // work around for Windows NT, Win 98, ...
486 // Without this the desktop has mysteriously only a size of 800x600 pixels.
487 ClientRect rect(hwnd);
488 MoveWindow(_hwndListView, 0, 0, rect.right, rect.bottom, TRUE);
489
490 // subclass background window
491 new BackgroundWindow(_hwndListView);
492
493 _icon_algo = 1; // default icon arrangement
494
495 PositionIcons();
496 InitDragDrop();
497 }
498
499 bool DesktopShellView::InitDragDrop()
500 {
501 CONTEXT("DesktopShellView::InitDragDrop()");
502
503 _pDropTarget = new DesktopDropTarget(_hwnd);
504
505 if (!_pDropTarget)
506 return false;
507
508 _pDropTarget->AddRef();
509
510 if (FAILED(RegisterDragDrop(_hwnd, _pDropTarget))) {
511 _pDropTarget->Release();
512 _pDropTarget = NULL;
513 return false;
514 }
515 else
516 _pDropTarget->Release();
517
518 FORMATETC ftetc;
519
520 ftetc.dwAspect = DVASPECT_CONTENT;
521 ftetc.lindex = -1;
522 ftetc.tymed = TYMED_HGLOBAL;
523 ftetc.cfFormat = CF_HDROP;
524
525 _pDropTarget->AddSuportedFormat(ftetc);
526
527 return true;
528 }
529
530 LRESULT DesktopShellView::WndProc(UINT nmsg, WPARAM wparam, LPARAM lparam)
531 {
532 switch(nmsg) {
533 case WM_CONTEXTMENU:
534 if (!DoContextMenu(GET_X_LPARAM(lparam), GET_Y_LPARAM(lparam)))
535 DoDesktopContextMenu(GET_X_LPARAM(lparam), GET_Y_LPARAM(lparam));
536 break;
537
538 case PM_SET_ICON_ALGORITHM:
539 _icon_algo = wparam;
540 PositionIcons();
541 break;
542
543 case PM_GET_ICON_ALGORITHM:
544 return _icon_algo;
545
546 case PM_DISPLAY_VERSION:
547 return SendMessage(_hwndListView, nmsg, wparam, lparam);
548
549 default:
550 return super::WndProc(nmsg, wparam, lparam);
551 }
552
553 return 0;
554 }
555
556 int DesktopShellView::Command(int id, int code)
557 {
558 return super::Command(id, code);
559 }
560
561 int DesktopShellView::Notify(int id, NMHDR* pnmh)
562 {
563 return super::Notify(id, pnmh);
564 }
565
566 bool DesktopShellView::DoContextMenu(int x, int y)
567 {
568 IDataObject* selection;
569
570 HRESULT hr = _pShellView->GetItemObject(SVGIO_SELECTION, IID_IDataObject, (void**)&selection);
571 if (FAILED(hr))
572 return false;
573
574 PIDList pidList;
575
576 hr = pidList.GetData(selection);
577 if (FAILED(hr)) {
578 selection->Release();
579 //CHECKERROR(hr);
580 return false;
581 }
582
583 LPIDA pida = pidList;
584 if (!pida->cidl) {
585 selection->Release();
586 return false;
587 }
588
589 LPCITEMIDLIST parent_pidl = (LPCITEMIDLIST) ((LPBYTE)pida+pida->aoffset[0]);
590
591 LPCITEMIDLIST* apidl = (LPCITEMIDLIST*) alloca(pida->cidl*sizeof(LPCITEMIDLIST));
592
593 for(int i=pida->cidl; i>0; --i)
594 apidl[i-1] = (LPCITEMIDLIST) ((LPBYTE)pida+pida->aoffset[i]);
595
596 hr = ShellFolderContextMenu(ShellFolder(parent_pidl), _hwnd, pida->cidl, apidl, x, y, _cm_ifs);
597
598 selection->Release();
599
600 CHECKERROR(hr);
601
602 return true;
603 }
604
605 HRESULT DesktopShellView::DoDesktopContextMenu(int x, int y)
606 {
607 IContextMenu* pcm;
608
609 HRESULT hr = DesktopFolder()->GetUIObjectOf(_hwnd, 0, NULL, IID_IContextMenu, NULL, (LPVOID*)&pcm);
610
611 if (SUCCEEDED(hr)) {
612 pcm = _cm_ifs.query_interfaces(pcm);
613
614 HMENU hmenu = CreatePopupMenu();
615
616 if (hmenu) {
617 hr = pcm->QueryContextMenu(hmenu, 0, FCIDM_SHVIEWFIRST, FCIDM_SHVIEWLAST-1, CMF_NORMAL|CMF_EXPLORE);
618
619 if (SUCCEEDED(hr)) {
620 AppendMenu(hmenu, MF_SEPARATOR, 0, NULL);
621 AppendMenu(hmenu, 0, FCIDM_SHVIEWLAST-1, ResString(IDS_ABOUT_EXPLORER));
622
623 UINT idCmd = TrackPopupMenu(hmenu, TPM_LEFTALIGN|TPM_RETURNCMD|TPM_RIGHTBUTTON, x, y, 0, _hwnd, NULL);
624
625 _cm_ifs.reset();
626
627 if (idCmd == FCIDM_SHVIEWLAST-1) {
628 explorer_about(_hwnd);
629 } else if (idCmd) {
630 CMINVOKECOMMANDINFO cmi;
631
632 cmi.cbSize = sizeof(CMINVOKECOMMANDINFO);
633 cmi.fMask = 0;
634 cmi.hwnd = _hwnd;
635 cmi.lpVerb = (LPCSTR)(INT_PTR)(idCmd - FCIDM_SHVIEWFIRST);
636 cmi.lpParameters = NULL;
637 cmi.lpDirectory = NULL;
638 cmi.nShow = SW_SHOWNORMAL;
639 cmi.dwHotKey = 0;
640 cmi.hIcon = 0;
641
642 hr = pcm->InvokeCommand(&cmi);
643 }
644 }
645 }
646
647 pcm->Release();
648 }
649
650 return hr;
651 }
652
653
654 #define ARRANGE_BORDER_DOWN 8
655 #define ARRANGE_BORDER_HV 9
656 #define ARRANGE_ROUNDABOUT 10
657
658 static const POINTS s_align_start[] = {
659 {0, 0}, // left/top
660 {0, 0},
661 {1, 0}, // right/top
662 {1, 0},
663 {0, 1}, // left/bottom
664 {0, 1},
665 {1, 1}, // right/bottom
666 {1, 1},
667
668 {0, 0}, // left/top
669 {0, 0},
670 {0, 0}
671 };
672
673 static const POINTS s_align_dir1[] = {
674 { 0, +1}, // down
675 {+1, 0}, // right
676 {-1, 0}, // left
677 { 0, +1}, // down
678 { 0, -1}, // up
679 {+1, 0}, // right
680 {-1, 0}, // left
681 { 0, -1}, // up
682
683 { 0, +1}, // down
684 {+1, 0}, // right
685 {+1, 0} // right
686 };
687
688 static const POINTS s_align_dir2[] = {
689 {+1, 0}, // right
690 { 0, +1}, // down
691 { 0, +1}, // down
692 {-1, 0}, // left
693 {+1, 0}, // right
694 { 0, -1}, // up
695 { 0, -1}, // up
696 {-1, 0}, // left
697
698 {+1, 0}, // right
699 { 0, +1}, // down
700 { 0, +1} // down
701 };
702
703 typedef pair<int,int> IconPos;
704 typedef map<IconPos, int> IconMap;
705
706 void DesktopShellView::PositionIcons(int dir)
707 {
708 DWORD spacing = ListView_GetItemSpacing(_hwndListView, FALSE);
709
710 RECT work_area;
711 SystemParametersInfo(SPI_GETWORKAREA, 0, &work_area, 0);
712
713 const POINTS& dir1 = s_align_dir1[_icon_algo];
714 const POINTS& dir2 = s_align_dir2[_icon_algo];
715 const POINTS& start_pos = s_align_start[_icon_algo];
716
717 int dir_x1 = dir1.x;
718 int dir_y1 = dir1.y;
719 int dir_x2 = dir2.x;
720 int dir_y2 = dir2.y;
721
722 int cx = LOWORD(spacing);
723 int cy = HIWORD(spacing);
724
725 int dx1 = dir_x1 * cx;
726 int dy1 = dir_y1 * cy;
727 int dx2 = dir_x2 * cx;
728 int dy2 = dir_y2 * cy;
729
730 int start_x = (start_pos.x * work_area.right)/cx*cx + (cx-32)/2;
731 int start_y = (start_pos.y * work_area.bottom)/cy*cy + 4/*(cy-32)/2*/;
732
733 if (start_x >= work_area.right)
734 start_x -= cx;
735
736 if (start_y >= work_area.bottom)
737 start_y -= cy;
738
739 int x = start_x;
740 int y = start_y;
741
742 int all = ListView_GetItemCount(_hwndListView);
743 int i1, i2;
744
745 if (dir > 0) {
746 i1 = 0;
747 i2 = all;
748 } else {
749 i1 = all-1;
750 i2 = -1;
751 }
752
753 IconMap pos_idx;
754 int cnt = 0;
755
756 for(int idx=i1; idx!=i2; idx+=dir) {
757 pos_idx[IconPos(y, x)] = idx;
758
759 if (_icon_algo == ARRANGE_BORDER_DOWN) {
760 if (++cnt & 1)
761 x = work_area.right - x;
762 else {
763 y += dy1;
764
765 if (y >= work_area.bottom) {
766 y = start_y;
767 x += dx2;
768 }
769 }
770
771 continue;
772 }
773 else if (_icon_algo == ARRANGE_BORDER_HV) {
774 if (++cnt & 1)
775 x = work_area.right - x;
776 else if (cnt & 2) {
777 y += dy1;
778
779 if (y >= work_area.bottom) {
780 y = start_y;
781 x += dx2;
782 }
783 } else {
784 x += dx1;
785
786 if (x >= work_area.right) {
787 x = start_x;
788 y += dy2;
789 }
790 }
791
792 continue;
793 }
794 else if (_icon_algo == ARRANGE_ROUNDABOUT) {
795
796 ///@todo
797
798 }
799
800 x += dx1;
801 y += dy1;
802
803 if (x<0 || x>=work_area.right) {
804 x = start_x;
805 y += dy2;
806 } else if (y<0 || y>=work_area.bottom) {
807 y = start_y;
808 x += dx2;
809 }
810 }
811
812 // use a little trick to get the icons where we want them to be...
813
814 for(IconMap::const_iterator it=pos_idx.end(); --it!=pos_idx.begin(); ) {
815 const IconPos& pos = it->first;
816
817 ListView_SetItemPosition32(_hwndListView, it->second, pos.second, pos.first);
818 }
819
820 for(IconMap::const_iterator it=pos_idx.begin(); it!=pos_idx.end(); ++it) {
821 const IconPos& pos = it->first;
822
823 ListView_SetItemPosition32(_hwndListView, it->second, pos.second, pos.first);
824 }
825 }
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