wallpaperTools.h File Reference

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Functions
void	setWallpaper (Photo *phto)
	Sets desktop wallpaper using specified photo.
bool	setWallpaperSupported ()
	Does Album Shaper support setting the wallpaper on this system?

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Function Documentation

void setWallpaper (  Photo *  phto  )

Sets desktop wallpaper using specified photo. Definition at line 34 of file wallpaperTools.cpp. References copyFile(), Photo::getImageFilename(), getImageSize(), and scaleImage(). Referenced by SubalbumWidget::setWallpaperAction(). { //Get full size image dimensions int imageW, imageH; getImageSize( phto->getImageFilename(), imageW, imageH ); //If image is larger than either screen dimension then scale it down int screenW = qApp->desktop()->screenGeometry().size().width(); int screenH = qApp->desktop()->screenGeometry().size().height(); //If image is larger than either screen dimensions then scale it to fit QImage scaledImage; if( imageW > screenW || imageH > screenH ) { scaleImage( phto->getImageFilename(), scaledImage, screenW, screenH ); imageW = scaledImage.width(); imageH = scaledImage.height(); } //If image is <75% of either screen dimensions, center it when setting it to the background //PLATFORM_SPECIFIC_CODE #ifndef Q_OS_MACX const bool centerImage = (imageW < 0.75*screenW) || (imageH < 0.75*screenH); #endif //Determine the final output filename. On Windows this is pretty simple, but on OSX and KDE/Unix //I've found that repeatedly setting the same filename to be used as the background does not result in a //refreshing of the background image. Apparently these window managers are trying to be "smart" and //avoid refreshing when the image has not changed, but in our case we are changing the image content, //just not the image filename. Alas a simple fix to this problem is to alternate using spaces and //underscores in the image filename and removing the old image. Another option might be to first set the //background image to null, but this might result in unwanted flicker so we use the slightly more //complicated approach involving alternating filenames. //PLATFORM_SPECIFIC_CODE //Windows #if defined(Q_OS_WIN) //determine location to store the desktop image QString outFilename; if( !getWindowsFolderLocation(LOCAL_SETTINGS_APPLICATION_DATA, outFilename) ) { outFilename = getenv("USERPROFILE") + QString("/Local Settings/Application Data"); } outFilename = QDir::convertSeparators( outFilename + "/Album Shaper/Album Shaper Wallpaper.bmp" ); //windows only support setting background image using BMP format, so if image was not scaled //load it so we can use QImage to save it as a BMP image now if( scaledImage.isNull() ) { scaledImage.load( phto->getImageFilename() ); } //save image out scaledImage.save( outFilename, "BMP" ); //OSX and other forms of UNIX #else //determine location to store the desktop image #if defined(Q_OS_MACX) QString outFilename1 = QDir::homeDirPath() + QString("/Pictures/Album Shaper Wallpaper.jpg"); QString outFilename2 = QDir::homeDirPath() + QString("/Pictures/Album_Shaper_Wallpaper.jpg"); #else QString outFilename1 = QDir::homeDirPath() + QString("/.albumShaper/Album Shaper Wallpaper.jpg"); QString outFilename2 = QDir::homeDirPath() + QString("/.albumShaper/Album_Shaper_Wallpaper.jpg"); #endif QString chosenFilename; QString oldFilename; //check if outFilename already exists. MacOSX is annoying in that when we create an apple event to //set the desktop wallpaper the Finder appears to ignore the event if the filename is the same //the current filename. Ug, so to trick it use the opposite filename (swap spaces with _'s in filename) QDir tmpDir; if(tmpDir.exists( outFilename1 ) ) { chosenFilename = outFilename2; oldFilename = outFilename1; } else if( tmpDir.exists( outFilename2 ) ) { chosenFilename = outFilename1; oldFilename = outFilename2; } else { chosenFilename = outFilename1; } //save out file in JPG format if( !scaledImage.isNull() ) { scaledImage.save( chosenFilename, "JPEG", 95 ); } else { copyFile( phto->getImageFilename(), chosenFilename ); } #endif //------------------------------- // The output filename has been determined, and the image prepared. // Now save out the scaled image and set the wallpaper using system specific methods. //------------------------------- //PLATFORM_SPECIFIC_CODE //Windows #if defined(Q_OS_WIN) //Set tile and stretch values HKEY key; char data[8]; if( RegOpenKeyExA( HKEY_CURRENT_USER, "Control Panel\\Desktop", 0, KEY_SET_VALUE, &key) == ERROR_SUCCESS) { //Set stretch factor, only stretch (2) if not using centering itoa( centerImage ? 0 : 2, data, 10); RegSetValueExA(key, "WallpaperStyle", NULL, REG_SZ, (UCHAR*)data, 8); //Never tile (0) itoa(0, data, 10); RegSetValueExA(key, "TileWallpaper", NULL, REG_SZ, (UCHAR*)data, 8); //Close the key RegCloseKey(key); } //set background wallpaper SystemParametersInfoA( SPI_SETDESKWALLPAPER, 0, (void*) outFilename.ascii(), SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE ); //------------------------------- //MacOSX #elif defined(Q_OS_MACX) //create script QString scriptFilename = ((Window*)qApp->mainWidget())->getTitle()->getAlbum()->getTmpDir() + "/tmpBackgroundScript"; QFile file( scriptFilename ); if(file.open(IO_WriteOnly)) { //----- QTextStream stream; stream.setDevice( &file ); stream.setEncoding( QTextStream::UnicodeUTF8 ); //----- stream << "tell application \"Finder\"\n"; stream << "set pFile to POSIX file \"" << chosenFilename.ascii() << "\"\n"; stream << "set desktop picture to file pFile\n"; stream << "end tell"; } file.close(); //run script to set background QProcess p; p.addArgument( "/usr/bin/osascript" ); p.addArgument( scriptFilename ); p.start(); //if there is an old file remove it if(!oldFilename.isNull()) { tmpDir.remove( oldFilename ); } //------------------------------- //UNIX #else //first try setting KDE background through DCOP interface { QProcess p; p.clearArguments(); p.addArgument( "dcop" ); p.addArgument( "kdesktop" ); p.addArgument( "KBackgroundIface" ); p.addArgument( "setWallpaper" ); p.addArgument( chosenFilename.ascii() ); //if the image width and height are at least 75% of the screen size then //use CENTERMAXSPECT. This will scale the image to fit the screen but //will not warp it by changing it's effective aspect ratio. Otherwise scaling up //will cause visible pixelation so user the CENTERED setting. const int CENTERED = 1; const int CENTER_MAXPECT = 4; int positionOption = centerImage ? CENTERED : CENTER_MAXPECT; p.addArgument( QString("%1").arg(positionOption) ); //attempt to background now using DCOP interface p.start(); } //try setting GNOME background using gconftool { QProcess p; p.clearArguments(); p.addArgument( "gconftool-2" ); p.addArgument( "-t" ); p.addArgument( "string" ); p.addArgument( "-s" ); p.addArgument( "/desktop/gnome/background/picture_filename" ); p.addArgument( chosenFilename.ascii() ); p.start(); } //try setting WindowMaker background using wmsetbg { QProcess p; p.clearArguments(); p.addArgument( "wmsetbg" ); p.addArgument( "--maxscale" ); p.addArgument( "-u" ); p.addArgument( chosenFilename.ascii() ); p.start(); } //if there is an old file remove it if(!oldFilename.isNull()) { tmpDir.remove( oldFilename ); } //------------------------------- #endif }

bool setWallpaperSupported (   )

Does Album Shaper support setting the wallpaper on this system? Definition at line 256 of file wallpaperTools.cpp. Referenced by SubalbumWidget::SubalbumWidget(). { //OSX supported! #if defined(Q_OS_MACX) return true; //Windows is supported! #elif defined(Q_OS_WIN) return true; //Last try, check if dcop or gconftool-2 can be used #else QProcess p; p.addArgument( "dcop" ); bool DCOP_Present = p.start(); p.clearArguments(); p.addArgument( "gconftool-2" ); bool gconftool_Present = p.start(); p.clearArguments(); p.addArgument( "wmsetbg" ); bool wmsetbg_Present = p.start(); return ( DCOP_Present || gconftool_Present || wmsetbg_Present ); #endif }

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