| Constantin Kaplinsky | 47ed8d3 | 2004-10-08 09:43:57 +0000 | [diff] [blame] | 1 | /* Copyright (C) 2002-2003 RealVNC Ltd. All Rights Reserved. |
| 2 | * |
| 3 | * This is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This software is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this software; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 16 | * USA. |
| 17 | */ |
| 18 | |
| 19 | // -=- WMCursor.cxx |
| 20 | |
| 21 | // *** DOESN'T SEEM TO WORK WITH GetCursorInfo POS CODE BUILT-IN UNDER NT4SP6 |
| 22 | // *** INSTEAD, WE LOOK FOR Win2000/Win98 OR ABOVE |
| 23 | #define WINVER 0x0500 |
| 24 | |
| 25 | #include <rfb_win32/WMCursor.h> |
| 26 | #include <rfb_win32/OSVersion.h> |
| 27 | #include <rfb_win32/Win32Util.h> |
| 28 | #include <rfb/Exception.h> |
| 29 | #include <rfb/LogWriter.h> |
| 30 | |
| 31 | using namespace rdr; |
| 32 | using namespace rfb; |
| 33 | using namespace rfb::win32; |
| 34 | |
| 35 | static LogWriter vlog("WMCursor"); |
| 36 | |
| 37 | |
| 38 | typedef BOOL (WINAPI *_GetCursorInfo_proto)(PCURSORINFO pci); |
| 39 | DynamicFn<_GetCursorInfo_proto> _GetCursorInfo(_T("user32.dll"), "GetCursorInfo"); |
| 40 | |
| 41 | |
| 42 | WMCursor::WMCursor() : hooks(0), library(0), use_getCursorInfo(false), cursor(0) { |
| 43 | #if (WINVER >= 0x0500) |
| 44 | // Check the OS version |
| 45 | bool is_win98 = (osVersion.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) && |
| 46 | (osVersion.dwMajorVersion > 4) || ((osVersion.dwMajorVersion == 4) && (osVersion.dwMinorVersion > 0)); |
| 47 | bool is_win2K = (osVersion.dwPlatformId == VER_PLATFORM_WIN32_NT) && (osVersion.dwMajorVersion >= 5); |
| 48 | |
| 49 | // Use GetCursorInfo if OS version is sufficient |
| 50 | use_getCursorInfo = (is_win98 || is_win2K) && _GetCursorInfo.isValid(); |
| 51 | #else |
| 52 | #pragma message ("not building in GetCursorInfo support") |
| 53 | #endif |
| 54 | if (!use_getCursorInfo) { |
| 55 | hooks = new WMCursorHooks(); |
| 56 | if (hooks && hooks->start()) { |
| 57 | vlog.info("falling back to cursor hooking"); |
| 58 | } else { |
| 59 | delete hooks; |
| 60 | hooks = 0; |
| 61 | vlog.error("unable to monitor cursor shape"); |
| 62 | } |
| 63 | } else { |
| 64 | vlog.info("using GetCursorInfo"); |
| 65 | } |
| 66 | cursor = (HCURSOR)LoadImage(0, IDC_ARROW, IMAGE_CURSOR, 0, 0, LR_DEFAULTSIZE | LR_SHARED); |
| 67 | } |
| 68 | |
| 69 | WMCursor::~WMCursor() { |
| 70 | if (hooks) delete hooks; |
| 71 | if (library) FreeLibrary(library); |
| 72 | } |
| 73 | |
| 74 | WMCursor::Info |
| 75 | WMCursor::getCursorInfo() { |
| 76 | Info result; |
| 77 | #if (WINVER >= 0x0500) |
| 78 | if (use_getCursorInfo) { |
| 79 | CURSORINFO info; |
| 80 | info.cbSize = sizeof(CURSORINFO); |
| 81 | if ((*_GetCursorInfo)(&info)) { |
| 82 | result.cursor = info.hCursor; |
| 83 | result.position = Point(info.ptScreenPos.x, info.ptScreenPos.y); |
| 84 | result.visible = info.flags & CURSOR_SHOWING; |
| 85 | return result; |
| 86 | } |
| 87 | } |
| 88 | #endif |
| 89 | // Fall back to the old way of doing things |
| 90 | POINT pos; |
| 91 | if (hooks) cursor = hooks->getCursor(); |
| 92 | result.cursor = cursor; |
| 93 | result.visible = cursor != 0; |
| 94 | GetCursorPos(&pos); |
| 95 | result.position.x = pos.x; |
| 96 | result.position.y = pos.y; |
| 97 | return result; |
| 98 | } |