131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
// This file is part of the VNC system.
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//
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// The VNC system is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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//
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// TightVNC distribution homepage on the Web: http://www.tightvnc.com/
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//
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// If the source code for the VNC system is not available from the place
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// whence you received this file, check http://www.uk.research.att.com/vnc or contact
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// the authors on vnc@uk.research.att.com for information on obtaining it.
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#include "WallpaperUtils.h"
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WallpaperUtils::WallpaperUtils()
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{
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m_restore_ActiveDesktop = false;
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m_restore_wallpaper = false;
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}
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void
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WallpaperUtils::KillActiveDesktop()
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{
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// Contact Active Desktop if possible
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HRESULT result;
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IActiveDesktop* active_desktop = 0;
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result = CoCreateInstance(CLSID_ActiveDesktop, NULL, CLSCTX_INPROC_SERVER,
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IID_IActiveDesktop, (void**)&active_desktop);
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if (result != S_OK) {
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return;
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}
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// Get Active Desktop options
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COMPONENTSOPT options;
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options.dwSize = sizeof(options);
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result = active_desktop->GetDesktopItemOptions(&options, 0);
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if (result != S_OK) {
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active_desktop->Release();
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return;
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}
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// Disable if currently active
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m_restore_ActiveDesktop = (options.fActiveDesktop != 0);
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if (options.fActiveDesktop) {
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options.fActiveDesktop = FALSE;
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result = active_desktop->SetDesktopItemOptions(&options, 0);
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if (result != S_OK) {
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active_desktop->Release();
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return;
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}
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}
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active_desktop->ApplyChanges(AD_APPLY_REFRESH);
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active_desktop->Release();
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}
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void
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WallpaperUtils::KillWallpaper()
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{
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if (!m_restore_wallpaper) {
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// Tell all applications that there is no wallpaper
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// Note that this doesn't change the wallpaper registry setting!
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SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "", SPIF_SENDCHANGE);
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m_restore_wallpaper = true;
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}
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CoInitialize(NULL);
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KillActiveDesktop();
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CoUninitialize();
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}
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void
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WallpaperUtils::RestoreActiveDesktop()
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{
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// Contact Active Desktop if possible
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HRESULT result;
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IActiveDesktop* active_desktop = 0;
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result = CoCreateInstance(CLSID_ActiveDesktop, NULL, CLSCTX_INPROC_SERVER,
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IID_IActiveDesktop, (void**)&active_desktop);
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if (result != S_OK) {
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return;
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}
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// Get Active Desktop options
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COMPONENTSOPT options;
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options.dwSize = sizeof(options);
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result = active_desktop->GetDesktopItemOptions(&options, 0);
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if (result != S_OK) {
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active_desktop->Release();
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return;
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}
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// Re-enable if previously disabled
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if (m_restore_ActiveDesktop) {
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m_restore_ActiveDesktop = false;
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options.fActiveDesktop = TRUE;
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result = active_desktop->SetDesktopItemOptions(&options, 0);
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if (result != S_OK) {
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active_desktop->Release();
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return;
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}
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}
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active_desktop->ApplyChanges(AD_APPLY_REFRESH);
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active_desktop->Release();
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}
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void
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WallpaperUtils::RestoreWallpaper()
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{
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CoInitialize(NULL);
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RestoreActiveDesktop();
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CoUninitialize();
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if (m_restore_wallpaper) {
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SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, NULL, SPIF_SENDCHANGE);
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m_restore_wallpaper = false;
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}
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}
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