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Bugfix from Marco: when selecting features in gpxprovider use proper …
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…intersection test rather than just testing if bounding boxes intersect

git-svn-id: http://svn.osgeo.org/qgis/trunk@9457 c8812cc2-4d05-0410-92ff-de0c093fc19c
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timlinux committed Oct 8, 2008
1 parent ce29a2f commit 928bcc6
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Showing 2 changed files with 147 additions and 102 deletions.
3 changes: 2 additions & 1 deletion src/gui/qgsmapcanvassnapper.cpp
View file
Expand Up @@ -48,12 +48,13 @@ QgsMapCanvasSnapper::~QgsMapCanvasSnapper()
void QgsMapCanvasSnapper::setMapCanvas( QgsMapCanvas* canvas )
{
mMapCanvas = canvas;
delete mSnapper;
if ( mMapCanvas )
{
mSnapper = new QgsSnapper( canvas->mapRenderer() );
}
else
{
{
mSnapper = 0;
}
}
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246 changes: 145 additions & 101 deletions src/providers/gpx/qgsgpxprovider.cpp
View file
Expand Up @@ -111,6 +111,7 @@ QgsGPXProvider::QgsGPXProvider( QString uri ) :
QgsGPXProvider::~QgsGPXProvider()
{
GPSData::releaseData( mFileName );
delete mSelectionRectangle;
}


Expand Down Expand Up @@ -212,59 +213,80 @@ bool QgsGPXProvider::nextFeature( QgsFeature& feature )
if (( rte->xMax >= b.xMin() ) && ( rte->xMin <= b.xMax() ) &&
( rte->yMax >= b.yMin() ) && ( rte->yMin <= b.yMax() ) )
{
feature.setFeatureId( rte->id );
result = true;

// some wkb voodoo
if ( mFetchGeom )
{
int nPoints = rte->points.size();
char* geo = new char[9 + 16 * nPoints];
std::memset( geo, 0, 9 + 16 * nPoints );
geo[0] = QgsApplication::endian();
geo[geo[0] == QgsApplication::NDR ? 1 : 4] = QGis::WKBLineString;
std::memcpy( geo + 5, &nPoints, 4 );
for ( uint i = 0; i < rte->points.size(); ++i )
int nPoints = rte->points.size();
char* geo = new char[9 + 16 * nPoints];
std::memset( geo, 0, 9 + 16 * nPoints );
geo[0] = QgsApplication::endian();
geo[geo[0] == QgsApplication::NDR ? 1 : 4] = QGis::WKBLineString;
std::memcpy( geo + 5, &nPoints, 4 );
for ( uint i = 0; i < rte->points.size(); ++i )
{
std::memcpy( geo + 9 + 16 * i, &rte->points[i].lon, sizeof( double ) );
std::memcpy( geo + 9 + 16 * i + 8, &rte->points[i].lat, sizeof( double ) );
}
feature.setGeometryAndOwnership(( unsigned char * )geo, 9 + 16 * nPoints );
}
feature.setValid( true );

// add attributes if they are wanted
for ( iter = mAttributesToFetch.begin(); iter != mAttributesToFetch.end(); ++iter )
{
switch ( *iter )
{
case NameAttr:
feature.addAttribute( NameAttr, QVariant( rte->name ) );
break;
case NumAttr:
if ( rte->number != std::numeric_limits<int>::max() )
feature.addAttribute( NumAttr, QVariant( rte->number ) );
break;
case CmtAttr:
feature.addAttribute( CmtAttr, QVariant( rte->cmt ) );
break;
case DscAttr:
feature.addAttribute( DscAttr, QVariant( rte->desc ) );
break;
case SrcAttr:
feature.addAttribute( SrcAttr, QVariant( rte->src ) );
break;
case URLAttr:
feature.addAttribute( URLAttr, QVariant( rte->url ) );
break;
case URLNameAttr:
feature.addAttribute( URLNameAttr, QVariant( rte->urlname ) );
break;
}
}

++mRteIter;
break;
//create QgsGeometry and use it for intersection test
//if geometry is to be fetched, it is attached to the feature, otherwise we delete it
QgsGeometry* theGeometry = new QgsGeometry();
theGeometry->setWkbAndOwnership(( unsigned char * )geo, 9 + 16 * nPoints);
bool intersection = theGeometry->intersects(b);//use geos for precise intersection test

if(!intersection)
{
delete theGeometry;
}
else
{
if(mFetchGeom)
{
feature.setGeometry(theGeometry);
}
else
{
delete theGeometry;
}
feature.setFeatureId( rte->id );
result = true;
feature.setValid( true );

// add attributes if they are wanted
for ( iter = mAttributesToFetch.begin(); iter != mAttributesToFetch.end(); ++iter )
{
switch ( *iter )
{
case NameAttr:
feature.addAttribute( NameAttr, QVariant( rte->name ) );
break;
case NumAttr:
if ( rte->number != std::numeric_limits<int>::max() )
feature.addAttribute( NumAttr, QVariant( rte->number ) );
break;
case CmtAttr:
feature.addAttribute( CmtAttr, QVariant( rte->cmt ) );
break;
case DscAttr:
feature.addAttribute( DscAttr, QVariant( rte->desc ) );
break;
case SrcAttr:
feature.addAttribute( SrcAttr, QVariant( rte->src ) );
break;
case URLAttr:
feature.addAttribute( URLAttr, QVariant( rte->url ) );
break;
case URLNameAttr:
feature.addAttribute( URLNameAttr, QVariant( rte->urlname ) );
break;
}
}

++mRteIter;
break;

}

//++mRteIter;
//xbreak;
}
}
}
Expand Down Expand Up @@ -295,71 +317,90 @@ bool QgsGPXProvider::nextFeature( QgsFeature& feature )
if (( trk->xMax >= b.xMin() ) && ( trk->xMin <= b.xMax() ) &&
( trk->yMax >= b.yMin() ) && ( trk->yMin <= b.yMax() ) )
{
feature.setFeatureId( trk->id );
result = true;

// some wkb voodoo
if ( mFetchGeom )
{
char* geo = new char[9 + 16 * totalPoints];
if ( !geo )
char* geo = new char[9 + 16 * totalPoints];
if ( !geo )
{
QgsDebugMsg( "Too large track!!!" );
return false;
}
std::memset( geo, 0, 9 + 16 * totalPoints );
geo[0] = QgsApplication::endian();
geo[geo[0] == QgsApplication::NDR ? 1 : 4] = QGis::WKBLineString;
std::memcpy( geo + 5, &totalPoints, 4 );

int thisPoint = 0;
for ( std::vector<TrackSegment>::size_type k = 0; k < trk->segments.size(); k++ )
std::memset( geo, 0, 9 + 16 * totalPoints );
geo[0] = QgsApplication::endian();
geo[geo[0] == QgsApplication::NDR ? 1 : 4] = QGis::WKBLineString;
std::memcpy( geo + 5, &totalPoints, 4 );
int thisPoint = 0;
for ( std::vector<TrackSegment>::size_type k = 0; k < trk->segments.size(); k++ )
{
int nPoints = trk->segments[k].points.size();
for ( int i = 0; i < nPoints; ++i )
{
std::memcpy( geo + 9 + 16 * thisPoint, &trk->segments[k].points[i].lon, sizeof( double ) );
std::memcpy( geo + 9 + 16 * thisPoint + 8, &trk->segments[k].points[i].lat, sizeof( double ) );
thisPoint++;
}
}
feature.setGeometryAndOwnership(( unsigned char * )geo, 9 + 16 * totalPoints );
}
feature.setValid( true );

// add attributes if they are wanted
for ( iter = mAttributesToFetch.begin(); iter != mAttributesToFetch.end(); ++iter )
{
switch ( *iter )
{
case NameAttr:
feature.addAttribute( NameAttr, QVariant( trk->name ) );
break;
case NumAttr:
if ( trk->number != std::numeric_limits<int>::max() )
feature.addAttribute( NumAttr, QVariant( trk->number ) );
break;
case CmtAttr:
feature.addAttribute( CmtAttr, QVariant( trk->cmt ) );
break;
case DscAttr:
feature.addAttribute( DscAttr, QVariant( trk->desc ) );
break;
case SrcAttr:
feature.addAttribute( SrcAttr, QVariant( trk->src ) );
break;
case URLAttr:
feature.addAttribute( URLAttr, QVariant( trk->url ) );
break;
case URLNameAttr:
feature.addAttribute( URLNameAttr, QVariant( trk->urlname ) );
break;
{
std::memcpy( geo + 9 + 16 * thisPoint, &trk->segments[k].points[i].lon, sizeof( double ) );
std::memcpy( geo + 9 + 16 * thisPoint + 8, &trk->segments[k].points[i].lat, sizeof( double ) );
thisPoint++;
}
}
}

++mTrkIter;
break;
//create QgsGeometry and use it for intersection test
//if geometry is to be fetched, it is attached to the feature, otherwise we delete it
QgsGeometry* theGeometry = new QgsGeometry();
theGeometry->setWkbAndOwnership(( unsigned char * )geo, 9 + 16 * totalPoints);
bool intersection = theGeometry->intersects(b);//use geos for precise intersection test

if(!intersection) //no intersection, delete geometry and move on
{
delete theGeometry;
}
else //intersection
{
if(mFetchGeom)
{
feature.setGeometry(theGeometry);
}
else
{
delete theGeometry;
}
feature.setFeatureId( trk->id );
result = true;

feature.setValid( true );

// add attributes if they are wanted
for ( iter = mAttributesToFetch.begin(); iter != mAttributesToFetch.end(); ++iter )
{
switch ( *iter )
{
case NameAttr:
feature.addAttribute( NameAttr, QVariant( trk->name ) );
break;
case NumAttr:
if ( trk->number != std::numeric_limits<int>::max() )
feature.addAttribute( NumAttr, QVariant( trk->number ) );
break;
case CmtAttr:
feature.addAttribute( CmtAttr, QVariant( trk->cmt ) );
break;
case DscAttr:
feature.addAttribute( DscAttr, QVariant( trk->desc ) );
break;
case SrcAttr:
feature.addAttribute( SrcAttr, QVariant( trk->src ) );
break;
case URLAttr:
feature.addAttribute( URLAttr, QVariant( trk->url ) );
break;
case URLNameAttr:
feature.addAttribute( URLNameAttr, QVariant( trk->urlname ) );
break;
}
}

++mTrkIter;
break;
}
}

}
}
return result;
Expand All @@ -370,6 +411,9 @@ void QgsGPXProvider::select( QgsAttributeList fetchAttributes,
bool fetchGeometry,
bool useIntersect )
{
delete mSelectionRectangle;
mSelectionRectangle = 0;

if ( rect.isEmpty() )
{
mSelectionRectangle = new QgsRect( extent() );
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