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qgsapplication.cpp
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qgsapplication.cpp
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/***************************************************************************
qgsapplication.cpp - Accessors for application-wide data
--------------------------------------
Date : 02-Jan-2006
Copyright : (C) 2006 by Tom Elwertowski
Email : telwertowski at users dot sourceforge dot net
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgsapplication.h"
#include "qgslogger.h"
#include "qgsmaplayerregistry.h"
#include "qgsproviderregistry.h"
#include "qgsexception.h"
#include <QDir>
#include <QFileOpenEvent>
#include <QMessageBox>
#include <QPalette>
#include <QSettings>
#ifndef Q_WS_WIN
#include <netinet/in.h>
#else
#include <winsock.h>
#endif
#include "qgsconfig.h"
#include <gdal.h>
#include <ogr_api.h>
#include <cpl_conv.h> // for setting gdal options
QObject * QgsApplication::mFileOpenEventReceiver;
QStringList QgsApplication::mFileOpenEventList;
QString QgsApplication::mPrefixPath;
QString QgsApplication::mPluginPath;
QString QgsApplication::mPkgDataPath;
QString QgsApplication::mLibraryPath;
QString QgsApplication::mLibexecPath;
QString QgsApplication::mThemeName;
QStringList QgsApplication::mDefaultSvgPaths;
QString QgsApplication::mConfigPath = QDir::homePath() + QString( "/.qgis/" );
bool QgsApplication::mRunningFromBuildDir = false;
QString QgsApplication::mBuildSourcePath;
QString QgsApplication::mBuildOutputPath;
QStringList QgsApplication::mGdalSkipList;
/*!
\class QgsApplication
\brief The QgsApplication class manages application-wide information.
This is a subclass of QApplication and should be instantiated in place of
QApplication. Most methods are static in keeping witn the design of QApplication.
This class hides platform-specific path information and provides
a portable way of referencing specific files and directories.
Ideally, hard-coded paths should appear only here and not in other modules
so that platform-conditional code is minimized and paths are easier
to change due to centralization.
*/
QgsApplication::QgsApplication( int & argc, char ** argv, bool GUIenabled, QString customConfigPath )
: QApplication( argc, argv, GUIenabled )
{
init( customConfigPath ); // init can also be called directly by e.g. unit tests that don't inherit QApplication.
}
void QgsApplication::init( QString customConfigPath )
{
// check if QGIS is run from build directory (not the install directory)
QDir appDir( applicationDirPath() );
if ( appDir.exists( "source_path.txt" ) )
{
QFile f( applicationDirPath() + "/source_path.txt" );
if ( f.open( QIODevice::ReadOnly ) )
{
mRunningFromBuildDir = true;
mBuildSourcePath = f.readAll();
#if defined(Q_WS_MACX) || defined(Q_WS_WIN32) || defined(WIN32)
mBuildOutputPath = applicationDirPath();
#else
mBuildOutputPath = applicationDirPath() + "/.."; // on linux
#endif
qDebug( "Running from build directory!" );
qDebug( "- source directory: %s", mBuildSourcePath.toAscii().data() );
qDebug( "- output directory of the build: %s", mBuildOutputPath.toAscii().data() );
}
}
if ( mRunningFromBuildDir )
{
// we run from source directory - not installed to destination (specified prefix)
mPrefixPath = QString(); // set invalid path
setPluginPath( mBuildOutputPath + "/" + QString( QGIS_PLUGIN_SUBDIR ) );
setPkgDataPath( mBuildSourcePath ); // directly source path - used for: doc, resources, svg
mLibraryPath = mBuildOutputPath + "/" + QGIS_LIB_SUBDIR + "/";
mLibexecPath = mBuildOutputPath + "/" + QGIS_LIBEXEC_SUBDIR + "/";
}
else
{
#if defined(Q_WS_MACX) || defined(Q_WS_WIN32) || defined(WIN32)
setPrefixPath( applicationDirPath(), true );
#else
QDir myDir( applicationDirPath() );
myDir.cdUp();
QString myPrefix = myDir.absolutePath();
setPrefixPath( myPrefix, true );
#endif
}
if ( !customConfigPath.isEmpty() )
{
mConfigPath = customConfigPath + "/"; // make sure trailing slash is included
}
mDefaultSvgPaths << qgisSettingsDirPath() + QString( "svg/" );
// set a working directory up for gdal to write .aux.xml files into
// for cases where the raster dir is read only to the user
// if the env var is already set it will be used preferentially
QString myPamPath = qgisSettingsDirPath() + QString( "gdal_pam/" );
QDir myDir( myPamPath );
if ( !myDir.exists() )
{
myDir.mkpath( myPamPath ); //fail silently
}
#if defined(Q_WS_WIN32) || defined(WIN32)
CPLSetConfigOption( "GDAL_PAM_PROXY_DIR", myPamPath.toUtf8() );
#else
//under other OS's we use an environment var so the user can
//override the path if he likes
int myChangeFlag = 0; //whether we want to force the env var to change
setenv( "GDAL_PAM_PROXY_DIR", myPamPath.toUtf8(), myChangeFlag );
#endif
}
QgsApplication::~QgsApplication()
{
}
bool QgsApplication::event( QEvent * event )
{
bool done = false;
if ( event->type() == QEvent::FileOpen )
{
// handle FileOpen event (double clicking a file icon in Mac OS X Finder)
if ( mFileOpenEventReceiver )
{
// Forward event to main window.
done = notify( mFileOpenEventReceiver, event );
}
else
{
// Store filename because receiver has not registered yet.
// If QGIS has been launched by double clicking a file icon, FileOpen will be
// the first event; the main window is not yet ready to handle the event.
mFileOpenEventList.append( static_cast<QFileOpenEvent *>( event )->file() );
done = true;
}
}
else
{
// pass other events to base class
done = QApplication::event( event );
}
return done;
}
bool QgsApplication::notify( QObject * receiver, QEvent * event )
{
bool done = false;
emit preNotify( receiver, event, &done );
if ( done )
return true;
// Send event to receiver and catch unhandled exceptions
done = true;
try
{
done = QApplication::notify( receiver, event );
}
catch ( QgsException & e )
{
QMessageBox::critical( activeWindow(), tr( "Exception" ), e.what() );
}
catch ( std::exception & e )
{
QMessageBox::critical( activeWindow(), tr( "Exception" ), e.what() );
}
catch ( ... )
{
QMessageBox::critical( activeWindow(), tr( "Exception" ), tr( "unknown exception" ) );
}
return done;
}
void QgsApplication::setFileOpenEventReceiver( QObject * receiver )
{
// Set receiver for FileOpen events
mFileOpenEventReceiver = receiver;
// Propagate any events collected before the receiver has registered.
if ( mFileOpenEventList.count() > 0 )
{
QStringListIterator i( mFileOpenEventList );
while ( i.hasNext() )
{
QFileOpenEvent foe( i.next() );
QgsApplication::sendEvent( mFileOpenEventReceiver, &foe );
}
mFileOpenEventList.clear();
}
}
void QgsApplication::setPrefixPath( const QString thePrefixPath, bool useDefaultPaths )
{
mPrefixPath = thePrefixPath;
#if defined(_MSC_VER)
if ( mPrefixPath.endsWith( "/bin" ) )
{
mPrefixPath.chop( 4 );
}
#endif
if ( useDefaultPaths )
{
setPluginPath( mPrefixPath + "/" + QString( QGIS_PLUGIN_SUBDIR ) );
setPkgDataPath( mPrefixPath + "/" + QString( QGIS_DATA_SUBDIR ) );
}
mLibraryPath = mPrefixPath + "/" + QGIS_LIB_SUBDIR + "/";
mLibexecPath = mPrefixPath + "/" + QGIS_LIBEXEC_SUBDIR + "/";
}
void QgsApplication::setPluginPath( const QString thePluginPath )
{
mPluginPath = thePluginPath;
}
void QgsApplication::setPkgDataPath( const QString thePkgDataPath )
{
mPkgDataPath = thePkgDataPath;
QString mySvgPath = thePkgDataPath + ( mRunningFromBuildDir ? "/images/svg/" : "/svg/" );
// avoid duplicate entries
if ( !mDefaultSvgPaths.contains( mySvgPath ) )
mDefaultSvgPaths << mySvgPath;
}
void QgsApplication::setDefaultSvgPaths( const QStringList& pathList )
{
mDefaultSvgPaths = pathList;
}
const QString QgsApplication::prefixPath()
{
if ( mRunningFromBuildDir )
{
qWarning( "!!! prefix path was requested, but it is not valid - we do not run from installed path !!!" );
}
return mPrefixPath;
}
const QString QgsApplication::pluginPath()
{
return mPluginPath;
}
const QString QgsApplication::pkgDataPath()
{
return mPkgDataPath;
}
const QString QgsApplication::defaultThemePath()
{
return ":/images/themes/default/";
}
const QString QgsApplication::activeThemePath()
{
return ":/images/themes/" + mThemeName + "/";
}
QString QgsApplication::iconPath( QString iconFile )
{
// try active theme
QString path = activeThemePath();
if ( QFile::exists( path + iconFile ) )
return path + iconFile;
// use default theme
return defaultThemePath() + iconFile;
}
/*!
Set the theme path to the specified theme.
*/
void QgsApplication::setThemeName( const QString theThemeName )
{
QString myPath = ":/images/themes/" + theThemeName + "/";
//check it exists and if not roll back to default theme
if ( QFile::exists( myPath ) )
{
mThemeName = theThemeName;
}
else
{
mThemeName = "default";
}
}
/*!
* Get the active theme name
*/
const QString QgsApplication::themeName()
{
return mThemeName;
}
/*!
Returns the path to the authors file.
*/
const QString QgsApplication::authorsFilePath()
{
return mPkgDataPath + QString( "/doc/AUTHORS" );
}
/*!
Returns the path to the contributors file.
*/
const QString QgsApplication::contributorsFilePath()
{
return mPkgDataPath + QString( "/doc/CONTRIBUTORS" );
}
/*!
Returns the path to the sponsors file.
*/
const QString QgsApplication::sponsorsFilePath()
{
return mPkgDataPath + QString( "/doc/SPONSORS" );
}
/*!
Returns the path to the donors file.
*/
const QString QgsApplication::donorsFilePath()
{
return mPkgDataPath + QString( "/doc/DONORS" );
}
/*!
Returns the path to the sponsors file.
@note Added in QGIS 1.1
*/
const QString QgsApplication::translatorsFilePath()
{
return mPkgDataPath + QString( "/doc/TRANSLATORS" );
}
const QString QgsApplication::developerPath()
{
return QString(); // developer images are no longer shipped!
}
/*!
Returns the path to the help application.
*/
const QString QgsApplication::helpAppPath()
{
QString helpAppPath;
#ifdef Q_OS_MACX
helpAppPath = applicationDirPath() + "/bin/qgis_help.app/Contents/MacOS";
#else
helpAppPath = libexecPath();
#endif
helpAppPath += "/qgis_help";
return helpAppPath;
}
/*!
Returns the path to the translation directory.
*/
const QString QgsApplication::i18nPath()
{
if ( mRunningFromBuildDir )
return mBuildOutputPath + QString( "/i18n" );
else
return mPkgDataPath + QString( "/i18n/" );
}
/*!
Returns the path to the master qgis.db file.
*/
const QString QgsApplication::qgisMasterDbFilePath()
{
return mPkgDataPath + QString( "/resources/qgis.db" );
}
/*!
Returns the path to the settings directory in user's home dir
*/
const QString QgsApplication::qgisSettingsDirPath()
{
return mConfigPath;
}
/*!
Returns the path to the user qgis.db file.
*/
const QString QgsApplication::qgisUserDbFilePath()
{
return qgisSettingsDirPath() + QString( "qgis.db" );
}
/*!
Returns the path to the splash screen image directory.
*/
const QString QgsApplication::splashPath()
{
return QString( ":/images/splash/" );
}
/*!
Returns the path to the icons image directory.
*/
const QString QgsApplication::iconsPath()
{
return mPkgDataPath + QString( "/images/icons/" );
}
/*!
Returns the path to the srs.db file.
*/
const QString QgsApplication::srsDbFilePath()
{
return mPkgDataPath + QString( "/resources/srs.db" );
}
/*!
Returns the paths to the svg directories.
*/
const QStringList QgsApplication::svgPaths()
{
//local directories to search when looking for an SVG with a given basename
//defined by user in options dialog
QSettings settings;
QStringList myPathList;
QString myPaths = settings.value( "svg/searchPathsForSVG", "" ).toString();
if ( !myPaths.isEmpty() )
{
myPathList = myPaths.split( "|" );
}
myPathList << mDefaultSvgPaths;
return myPathList;
}
/*!
Returns the path to the applications svg directories.
*/
const QString QgsApplication::svgPath()
{
QString svgSubDir( mRunningFromBuildDir ? "/images/svg/" : "/svg/" );
return mPkgDataPath + svgSubDir;
}
const QString QgsApplication::userStyleV2Path()
{
return qgisSettingsDirPath() + QString( "symbology-ng-style.xml" );
}
const QString QgsApplication::defaultStyleV2Path()
{
return mPkgDataPath + QString( "/resources/symbology-ng-style.xml" );
}
const QString QgsApplication::libraryPath()
{
return mLibraryPath;
}
const QString QgsApplication::libexecPath()
{
return mLibexecPath;
}
QgsApplication::endian_t QgsApplication::endian()
{
return ( htonl( 1 ) == 1 ) ? XDR : NDR ;
}
void QgsApplication::initQgis()
{
// set the provider plugin path (this creates provider registry)
QgsProviderRegistry::instance( pluginPath() );
// create map layer registry if doesn't exist
QgsMapLayerRegistry::instance();
}
void QgsApplication::exitQgis()
{
delete QgsMapLayerRegistry::instance();
delete QgsProviderRegistry::instance();
}
QString QgsApplication::showSettings()
{
QString myState = QString( "Application state:\n"
"Prefix : %1\n"
"Plugin Path : %2\n"
"Package Data Path : %3\n"
"Active Theme Name : %4\n"
"Active Theme Path : %5\n"
"Default Theme Path : %6\n"
"SVG Search Paths : %7\n"
"User DB Path : %8\n" )
.arg( mPrefixPath )
.arg( mPluginPath )
.arg( mPkgDataPath )
.arg( themeName() )
.arg( activeThemePath() )
.arg( defaultThemePath() )
.arg( svgPaths().join( "\n" ) )
.arg( qgisMasterDbFilePath() );
return myState;
}
QString QgsApplication::reportStyleSheet()
{
//
// Make the style sheet desktop preferences aware by using qappliation
// palette as a basis for colors where appropriate
//
QColor myColor1 = palette().highlight().color();
QColor myColor2 = myColor1;
myColor2 = myColor2.lighter( 110 ); //10% lighter
QString myStyle;
myStyle = ".glossy{ background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1, "
"stop: 0 " + myColor1.name() + ","
"stop: 0.1 " + myColor2.name() + ","
"stop: 0.5 " + myColor1.name() + ","
"stop: 0.9 " + myColor2.name() + ","
"stop: 1 " + myColor1.name() + ");"
"color: white;"
"padding-left: 4px;"
"padding-top: 20px;"
"padding-bottom: 8px;"
"border: 1px solid #6c6c6c;"
"}"
".overview{ font: 1.82em; font-weight: bold;}"
"body{ background: white;"
" color: black;"
" font-family: arial,sans-serif;"
"}"
"h1{ background-color: #F6F6F6;"
" color: #8FB171; "
" font-size: x-large; "
" font-weight: normal;"
" font-family: luxi serif, georgia, times new roman, times, serif;"
" background: none;"
" padding: 0.75em 0 0;"
" margin: 0;"
" line-height: 3em;"
"}"
"h2{ background-color: #F6F6F6;"
" color: #8FB171; "
" font-size: medium; "
" font-weight: normal;"
" font-family: luxi serif, georgia, times new roman, times, serif;"
" background: none;"
" padding: 0.75em 0 0;"
" margin: 0;"
" line-height: 1.1em;"
"}"
"h3{ background-color: #F6F6F6;"
" color: #729FCF;"
" font-family: luxi serif, georgia, times new roman, times, serif;"
" font-weight: bold;"
" font-size: large;"
" text-align: right;"
" border-bottom: 5px solid #DCEB5C;"
"}"
"h4{ background-color: #F6F6F6;"
" color: #729FCF;"
" font-family: luxi serif, georgia, times new roman, times, serif;"
" font-weight: bold;"
" font-size: medium;"
" text-align: right;"
"}"
"h5{ background-color: #F6F6F6;"
" color: #729FCF;"
" font-family: luxi serif, georgia, times new roman, times, serif;"
" font-weight: bold;"
" font-size: small;"
" text-align: right;"
"}"
"a{ color: #729FCF;"
" font-family: arial,sans-serif;"
" font-size: small;"
"}"
"label{ background-color: #FFFFCC;"
" border: 1px solid black;"
" margin: 1px;"
" padding: 0px 3px; "
" font-size: small;"
"}";
return myStyle;
}
void QgsApplication::registerOgrDrivers()
{
if ( 0 >= OGRGetDriverCount() )
{
OGRRegisterAll();
}
}
QString QgsApplication::absolutePathToRelativePath( QString aPath, QString targetPath )
{
#if defined( Q_OS_WIN )
const Qt::CaseSensitivity cs = Qt::CaseInsensitive;
aPath.replace( "\\", "/" );
if ( aPath.startsWith( "//" ) )
{
// keep UNC prefix
aPath = "\\\\" + aPath.mid( 2 );
}
targetPath.replace( "\\", "/" );
if ( targetPath.startsWith( "//" ) )
{
// keep UNC prefix
targetPath = "\\\\" + targetPath.mid( 2 );
}
#else
const Qt::CaseSensitivity cs = Qt::CaseSensitive;
#endif
QStringList targetElems = targetPath.split( "/", QString::SkipEmptyParts );
QStringList aPathElems = aPath.split( "/", QString::SkipEmptyParts );
targetElems.removeAll( "." );
aPathElems.removeAll( "." );
// remove common part
int n = 0;
while ( aPathElems.size() > 0 &&
targetElems.size() > 0 &&
aPathElems[0].compare( targetElems[0], cs ) == 0 )
{
aPathElems.removeFirst();
targetElems.removeFirst();
n++;
}
if ( n == 0 )
{
// no common parts; might not even be a file
return aPath;
}
if ( targetElems.size() > 0 )
{
// go up to the common directory
for ( int i = 0; i < targetElems.size(); i++ )
{
aPathElems.insert( 0, ".." );
}
}
else
{
// let it start with . nevertheless,
// so relative path always start with either ./ or ../
aPathElems.insert( 0, "." );
}
return aPathElems.join( "/" );
}
QString QgsApplication::relativePathToAbsolutePath( QString rpath, QString targetPath )
{
// relative path should always start with ./ or ../
if ( !rpath.startsWith( "./" ) && !rpath.startsWith( "../" ) )
{
return rpath;
}
#if defined(Q_OS_WIN)
rpath.replace( "\\", "/" );
targetPath.replace( "\\", "/" );
bool uncPath = targetPath.startsWith( "//" );
#endif
QStringList srcElems = rpath.split( "/", QString::SkipEmptyParts );
QStringList targetElems = targetPath.split( "/", QString::SkipEmptyParts );
#if defined(Q_OS_WIN)
if ( uncPath )
{
targetElems.insert( 0, "" );
targetElems.insert( 0, "" );
}
#endif
// append source path elements
targetElems << srcElems;
targetElems.removeAll( "." );
// resolve ..
int pos;
while (( pos = targetElems.indexOf( ".." ) ) > 0 )
{
// remove preceding element and ..
targetElems.removeAt( pos - 1 );
targetElems.removeAt( pos - 1 );
}
#if !defined(Q_OS_WIN)
// make path absolute
targetElems.prepend( "" );
#endif
return targetElems.join( "/" );
}
void QgsApplication::skipGdalDriver( QString theDriver )
{
if ( mGdalSkipList.contains( theDriver ) || theDriver.isEmpty() )
{
return;
}
mGdalSkipList << theDriver;
applyGdalSkippedDrivers();
}
void QgsApplication::restoreGdalDriver( QString theDriver )
{
if ( !mGdalSkipList.contains( theDriver ) )
{
return;
}
int myPos = mGdalSkipList.indexOf( theDriver );
if ( myPos >= 0 )
{
mGdalSkipList.removeAt( myPos );
}
applyGdalSkippedDrivers();
}
void QgsApplication::applyGdalSkippedDrivers()
{
mGdalSkipList.removeDuplicates();
QString myDriverList = mGdalSkipList.join( " " );
QgsDebugMsg( "Gdal Skipped driver list set to:" );
QgsDebugMsg( myDriverList );
CPLSetConfigOption( "GDAL_SKIP", myDriverList.toUtf8() );
GDALAllRegister(); //to update driver list and skip missing ones
}