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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? | |
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
}
