int main(int argc, char ** argv)
{
// Start the Application
QgsApplication app(argc, argv, true);
QString myPluginsDir = "/home/timlinux/apps/lib/qgis";
QString myLayerPath = "/home/timlinux/gisdata/brazil/BR_Cidades/";
QString myLayerBaseName = "Brasil_Cap";
QString myProviderName = "ogr";
// Instantiate Provider Registry
QgsProviderRegistry::instance(myPluginsDir);
// create a maplayer instance
QgsVectorLayer * mypLayer =
new QgsVectorLayer(myLayerPath, myLayerBaseName, myProviderName);
QgsSingleSymbolRenderer *mypRenderer = new QgsSingleSymbolRenderer(mypLayer->geometryType());
QList <QgsMapCanvasLayer> myLayerSet;
mypLayer->setRenderer(mypRenderer);
if (mypLayer->isValid())
{
qDebug("Layer is valid");
}
else
{
qDebug("Layer is NOT valid");
}
// Add the Vector Layer to the Layer Registry
QgsMapLayerRegistry::instance()->addMapLayer(mypLayer, TRUE);
// Add the Layer to the Layer Set
myLayerSet.append(QgsMapCanvasLayer(mypLayer, TRUE));
// Create the Map Canvas
QgsMapCanvas * mypMapCanvas = new QgsMapCanvas(0, 0);
mypMapCanvas->setExtent(mypLayer->extent());
mypMapCanvas->enableAntiAliasing(true);
mypMapCanvas->setCanvasColor(QColor(255, 255, 255));
mypMapCanvas->freeze(false);
// Set the Map Canvas Layer Set
mypMapCanvas->setLayerSet(myLayerSet);
mypMapCanvas->setVisible(true);
mypMapCanvas->refresh();
// Start the Application Event Loop
return app.exec();
}
// Slot called when the menu item is triggered
void SqlAnywhere::addSqlAnywhereLayer()
{
QgsMapCanvas *mMapCanvas = mQGisIface->mapCanvas();
if ( mMapCanvas && mMapCanvas->isDrawing() )
{
return;
}
// show the data source dialog
SaSourceSelect *dbs = new SaSourceSelect( mQGisIface->mainWindow() );
mMapCanvas->freeze();
if ( dbs->exec() )
{
// add files to the map canvas
QStringList tables = dbs->selectedTables();
SaDebugMsg( "Selected tables:\n" + tables.join( "\n" ) + "\n\n" );
QApplication::setOverrideCursor( Qt::WaitCursor );
// retrieve database connection string
QString connectionInfo = dbs->connectionInfo();
// create a new map layer for each selected table and register it
for ( QStringList::Iterator it = tables.begin() ; it != tables.end() ; it++ )
{
// create the layer
SaDebugMsg( "Creating layer " + *it );
SaLayer *layer = new SaLayer( connectionInfo + " " + *it, *it );
if ( layer->isValid() )
{
// set initial layer name to table name
SaDebugMsg( "Beautifying layer name. old: " + layer->name() );
QgsDataSourceURI layerUri = QgsDataSourceURI( *it );
QString newName = QString( "%1 (%2)" )
.arg( layerUri.table() )
.arg( layerUri.geometryColumn() );
if ( QgsMapLayerRegistry::instance()->mapLayers().contains( newName ) )
{
newName = QString( "%1.%2 (%3)" )
.arg( layerUri.schema() )
.arg( layerUri.table() )
.arg( layerUri.geometryColumn() );
if ( QgsMapLayerRegistry::instance()->mapLayers().contains( newName ) )
{
// give up and revert to original name
newName = layer->name();
}
}
layer->setLayerName( newName );
SaDebugMsg( "Beautifying layer name. new: " + layer->name() );
// register this layer with the central layers registry
QgsMapLayerRegistry::instance()->addMapLayer(( QgsVectorLayer* )layer );
}
else
{
SaDebugMsg(( *it ) + " is an invalid layer - not loaded" );
QMessageBox::critical( mQGisIface->mainWindow(), tr( "Invalid Layer" ), tr( "%1 is an invalid layer and cannot be loaded." ).arg( *it ) );
delete layer;
}
}
QApplication::restoreOverrideCursor();
(( QMainWindow * ) mQGisIface->mainWindow() )->statusBar()->showMessage( mMapCanvas->extent().toString( 2 ) );
}
delete dbs;
// update UI
qApp->processEvents();
// draw the map
mMapCanvas->freeze( false );
mMapCanvas->refresh();
} // SqlAnywhere::addSqlAnywhereLayer()
