mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-24 00:47:57 -05:00
- ran files through GNU indent to make it easier to read code
- isValid() was always returning true when, in fact, occasionally the provider was not in a valid state git-svn-id: http://svn.osgeo.org/qgis/trunk@978 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
mcoletti
parent
7d1631703c
commit
ab3b85fdbb
@ -13,88 +13,93 @@
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QgsShapeFileProvider::QgsShapeFileProvider(QString uri):dataSourceUri(uri), minmaxcachedirty(true)
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{
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OGRRegisterAll();
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// make connection to the data source
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#ifdef QGISDEBUG
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std::cerr << "Data source uri is " << uri << std::endl;
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#endif
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ogrDataSource = OGRSFDriverRegistrar::Open((const char *) uri);
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if (ogrDataSource != NULL) {
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#ifdef QGISDEBUG
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std::cerr << "Data source is valid" << std::endl;
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#endif
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valid = true;
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ogrLayer = ogrDataSource->GetLayer(0);
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// get the extent_ (envelope) of the layer
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#ifdef QGISDEBUG
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std::cerr << "Starting get extent\n";
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#endif
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extent_ = new OGREnvelope();
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ogrLayer->GetExtent(extent_);
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#ifdef QGISDEBUG
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std::cerr << "Finished get extent\n";
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#endif
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// getting the total number of features in the layer
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numberFeatures = ogrLayer->GetFeatureCount();
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// check the validity of the layer
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#ifdef QGISDEBUG
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std::cerr << "checking validity\n";
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#endif
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OGRFeature *feat = ogrLayer->GetNextFeature();
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if (feat) {
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OGRGeometry *geom = feat->GetGeometryRef();
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if (geom) {
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geomType = geom->getGeometryType();
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} else {
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valid = false;
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}
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// Populate the field vector for this layer. The field vector contains
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// field name, type, length, and precision (if numeric)
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for (int i = 0; i < feat->GetFieldCount(); i++) {
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OGRFieldDefn *fldDef = feat->GetFieldDefnRef(i);
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attributeFields.push_back(QgsField(
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fldDef->GetNameRef(),
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fldDef->GetFieldTypeName(fldDef->GetType()),
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fldDef->GetWidth(),
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fldDef->GetPrecision()));
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}
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OGRRegisterAll();
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delete feat;
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} else {
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valid = false;
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}
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ogrLayer->ResetReading();
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#ifdef QGISDEBUG
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std::cerr << "Done checking validity\n";
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#endif
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} else {
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std::cerr << "Data source is invalid" << std::endl;
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const char *er = CPLGetLastErrorMsg();
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#ifdef QGISDEBUG
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std::cerr << er << std::endl;
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#endif
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valid = false;
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}
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//resize the cache matrix
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minmaxcache=new double*[fieldCount()];
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for(int i=0;i<fieldCount();i++)
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{
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minmaxcache[i]=new double[2];
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}
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// make connection to the data source
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#ifdef QGISDEBUG
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std::cerr << "Data source uri is " << uri << std::endl;
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#endif
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ogrDataSource = OGRSFDriverRegistrar::Open((const char *) uri);
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if (ogrDataSource != NULL)
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{
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#ifdef QGISDEBUG
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std::cerr << "Data source is valid" << std::endl;
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#endif
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valid = true;
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ogrLayer = ogrDataSource->GetLayer(0);
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// get the extent_ (envelope) of the layer
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#ifdef QGISDEBUG
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std::cerr << "Starting get extent\n";
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#endif
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extent_ = new OGREnvelope();
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ogrLayer->GetExtent(extent_);
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#ifdef QGISDEBUG
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std::cerr << "Finished get extent\n";
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#endif
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// getting the total number of features in the layer
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numberFeatures = ogrLayer->GetFeatureCount();
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// check the validity of the layer
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#ifdef QGISDEBUG
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std::cerr << "checking validity\n";
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#endif
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OGRFeature *feat = ogrLayer->GetNextFeature();
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if (feat)
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{
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OGRGeometry *geom = feat->GetGeometryRef();
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if (geom)
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{
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geomType = geom->getGeometryType();
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} else
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{
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valid = false;
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}
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// Populate the field vector for this layer. The field vector contains
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// field name, type, length, and precision (if numeric)
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for (int i = 0; i < feat->GetFieldCount(); i++)
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{
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OGRFieldDefn *fldDef = feat->GetFieldDefnRef(i);
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attributeFields.push_back(QgsField(fldDef->GetNameRef(),
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fldDef->GetFieldTypeName(fldDef->GetType()),
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fldDef->GetWidth(), fldDef->GetPrecision()));
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}
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delete feat;
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} else
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{
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valid = false;
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}
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ogrLayer->ResetReading();
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#ifdef QGISDEBUG
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std::cerr << "Done checking validity\n";
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#endif
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} else
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{
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std::cerr << "Data source is invalid" << std::endl;
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const char *er = CPLGetLastErrorMsg();
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#ifdef QGISDEBUG
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std::cerr << er << std::endl;
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#endif
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valid = false;
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}
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//resize the cache matrix
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minmaxcache = new double *[fieldCount()];
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for (int i = 0; i < fieldCount(); i++)
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{
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minmaxcache[i] = new double[2];
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}
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}
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QgsShapeFileProvider::~QgsShapeFileProvider()
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{
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for(int i=0;i<fieldCount();i++)
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for (int i = 0; i < fieldCount(); i++)
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{
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delete minmaxcache[i];
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delete minmaxcache[i];
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}
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delete[] minmaxcache;
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delete[]minmaxcache;
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}
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/**
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@ -103,171 +108,183 @@ QgsShapeFileProvider::~QgsShapeFileProvider()
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*/
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QgsFeature *QgsShapeFileProvider::getFirstFeature(bool fetchAttributes)
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{
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QgsFeature *f = 0;
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if(valid){
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#ifdef QGISDEBUG
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std::cerr << "getting first feature\n";
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#endif
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ogrLayer->ResetReading();
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OGRFeature *feat = ogrLayer->GetNextFeature();
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if(feat){
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#ifdef QGISDEBUG
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std::cerr << "First feature is not null\n";
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#endif
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}else{
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#ifdef QGISDEBUG
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std::cerr << "First feature is null\n";
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#endif
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}
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f = new QgsFeature(feat->GetFID());
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f->setGeometry(getGeometryPointer(feat));
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if(fetchAttributes){
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getFeatureAttributes(feat, f);
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}
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}
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return f;
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QgsFeature *f = 0;
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if (valid)
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{
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#ifdef QGISDEBUG
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std::cerr << "getting first feature\n";
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#endif
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ogrLayer->ResetReading();
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OGRFeature *feat = ogrLayer->GetNextFeature();
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if (feat)
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{
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#ifdef QGISDEBUG
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std::cerr << "First feature is not null\n";
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#endif
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} else
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{
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#ifdef QGISDEBUG
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std::cerr << "First feature is null\n";
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#endif
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}
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f = new QgsFeature(feat->GetFID());
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f->setGeometry(getGeometryPointer(feat));
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if (fetchAttributes)
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{
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getFeatureAttributes(feat, f);
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}
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}
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return f;
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}
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/**
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/**
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* Get the next feature resutling from a select operation
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* Return 0 if there are no features in the selection set
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* @return QgsFeature
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*/
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QgsFeature *QgsShapeFileProvider::getNextFeature(bool fetchAttributes)
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{
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QgsFeature *f = 0;
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if(valid){
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//std::cerr << "getting next feature\n";
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OGRFeature *fet = ogrLayer->GetNextFeature();
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if(fet){
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OGRGeometry *geom = fet->GetGeometryRef();
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// get the wkb representation
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unsigned char *feature = new unsigned char[geom->WkbSize()];
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geom->exportToWkb((OGRwkbByteOrder) endian(), feature);
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f = new QgsFeature(fet->GetFID());
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f->setGeometry(feature);
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if(fetchAttributes){
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getFeatureAttributes(fet, f);
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}
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/* char *wkt = new char[2 * geom->WkbSize()];
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geom->exportToWkt(&wkt);
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f->setWellKnownText(wkt);
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delete[] wkt; */
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delete fet;
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}else{
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#ifdef QGISDEBUG
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std::cerr << "Feature is null\n";
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#endif
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// probably should reset reading here
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ogrLayer->ResetReading();
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}
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}else{
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#ifdef QGISDEBUG
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std::cerr << "Read attempt on an invalid shapefile data source\n";
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#endif
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}
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return f;
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QgsFeature *f = 0;
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if (valid)
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{
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//std::cerr << "getting next feature\n";
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OGRFeature *fet = ogrLayer->GetNextFeature();
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if (fet)
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{
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OGRGeometry *geom = fet->GetGeometryRef();
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// get the wkb representation
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unsigned char *feature = new unsigned char[geom->WkbSize()];
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geom->exportToWkb((OGRwkbByteOrder) endian(), feature);
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f = new QgsFeature(fet->GetFID());
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f->setGeometry(feature);
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if (fetchAttributes)
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{
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getFeatureAttributes(fet, f);
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}
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/* char *wkt = new char[2 * geom->WkbSize()];
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geom->exportToWkt(&wkt);
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f->setWellKnownText(wkt);
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delete[] wkt; */
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delete fet;
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} else
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{
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#ifdef QGISDEBUG
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std::cerr << "Feature is null\n";
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#endif
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// probably should reset reading here
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ogrLayer->ResetReading();
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}
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} else
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{
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#ifdef QGISDEBUG
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std::cerr << "Read attempt on an invalid shapefile data source\n";
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#endif
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}
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return f;
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}
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/**
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/**
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* Select features based on a bounding rectangle. Features can be retrieved
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* with calls to getFirstFeature and getNextFeature.
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* @param mbr QgsRect containing the extent to use in selecting features
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*/
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void QgsShapeFileProvider::select(QgsRect *rect, bool useIntersect)
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{
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// spatial query to select features
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// std::cerr << "Selection rectangle is " << *rect << std::endl;
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OGRGeometry *filter = 0;
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filter = new OGRPolygon();
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QString wktExtent = QString("POLYGON ((%1))").arg(rect->stringRep());
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const char *wktText = (const char *)wktExtent;
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OGRErr result = ((OGRPolygon *) filter)->importFromWkt((char **)&wktText);
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//TODO - detect an error in setting the filter and figure out what to
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//TODO about it. If setting the filter fails, all records will be returned
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if (result == OGRERR_NONE) {
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void QgsShapeFileProvider::select(QgsRect * rect, bool useIntersect)
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{
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// spatial query to select features
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// std::cerr << "Selection rectangle is " << *rect << std::endl;
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OGRGeometry *filter = 0;
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filter = new OGRPolygon();
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QString wktExtent = QString("POLYGON ((%1))").arg(rect->stringRep());
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const char *wktText = (const char *) wktExtent;
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OGRErr result = ((OGRPolygon *) filter)->importFromWkt((char **) &wktText);
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//TODO - detect an error in setting the filter and figure out what to
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//TODO about it. If setting the filter fails, all records will be returned
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if (result == OGRERR_NONE)
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{
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// std::cerr << "Setting spatial filter using " << wktExtent << std::endl;
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ogrLayer->SetSpatialFilter(filter);
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// std::cerr << "Feature count: " << ogrLayer->GetFeatureCount() << std::endl;
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/* int featureCount = 0;
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while (OGRFeature * fet = ogrLayer->GetNextFeature()) {
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if (fet) {
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select(fet->GetFID());
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if (tabledisplay) {
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tabledisplay->table()->selectRowWithId(fet->GetFID());
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(*selected)[fet->GetFID()] = true;
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}
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}
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}
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ogrLayer->ResetReading();*/
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}else{
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#ifdef QGISDEBUG
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/* int featureCount = 0;
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while (OGRFeature * fet = ogrLayer->GetNextFeature()) {
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if (fet) {
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select(fet->GetFID());
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if (tabledisplay) {
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tabledisplay->table()->selectRowWithId(fet->GetFID());
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(*selected)[fet->GetFID()] = true;
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}
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}
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}
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ogrLayer->ResetReading(); */
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} else
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{
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#ifdef QGISDEBUG
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std::cerr << "Setting spatial filter failed!" << std::endl;
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#endif
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#endif
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}
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}
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}
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/**
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/**
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* Set the data source specification. This may be a path or database
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* connection string
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* @uri data source specification
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*/
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void QgsShapeFileProvider::setDataSourceUri(QString uri)
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{
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dataSourceUri = uri;
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dataSourceUri = uri;
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}
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/**
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/**
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* Get the data source specification. This may be a path or database
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* connection string
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* @return data source specification
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*/
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QString QgsShapeFileProvider::getDataSourceUri()
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{
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return dataSourceUri;
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return dataSourceUri;
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}
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/**
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/**
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* Identify features within the search radius specified by rect
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* @param rect Bounding rectangle of search radius
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* @return std::vector containing QgsFeature objects that intersect rect
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*/
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std::vector<QgsFeature>& QgsShapeFileProvider::identify(QgsRect * rect)
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std::vector < QgsFeature > &QgsShapeFileProvider::identify(QgsRect * rect)
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{
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// select the features
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select(rect);
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}
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unsigned char * QgsShapeFileProvider::getGeometryPointer(OGRFeature *fet){
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OGRGeometry *geom = fet->GetGeometryRef();
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unsigned char *gPtr=0;
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// get the wkb representation
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gPtr = new unsigned char[geom->WkbSize()];
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geom->exportToWkb((OGRwkbByteOrder) endian(), gPtr);
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return gPtr;
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unsigned char *QgsShapeFileProvider::getGeometryPointer(OGRFeature * fet)
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{
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OGRGeometry *geom = fet->GetGeometryRef();
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unsigned char *gPtr = 0;
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// get the wkb representation
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gPtr = new unsigned char[geom->WkbSize()];
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geom->exportToWkb((OGRwkbByteOrder) endian(), gPtr);
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return gPtr;
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}
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int QgsShapeFileProvider::endian()
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{
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char *chkEndian = new char[4];
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memset(chkEndian, '\0', 4);
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chkEndian[0] = 0xE8;
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char *chkEndian = new char[4];
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memset(chkEndian, '\0', 4);
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chkEndian[0] = 0xE8;
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int *ce = (int *) chkEndian;
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int retVal;
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if (232 == *ce)
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retVal = NDR;
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else
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retVal = XDR;
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delete[]chkEndian;
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return retVal;
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int *ce = (int *) chkEndian;
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int retVal;
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if (232 == *ce)
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retVal = NDR;
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else
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retVal = XDR;
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delete[]chkEndian;
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return retVal;
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}
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// TODO - make this function return the real extent_
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@ -279,132 +296,150 @@ QgsRect *QgsShapeFileProvider::extent()
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/**
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* Return the feature type
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*/
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int QgsShapeFileProvider::geometryType(){
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return geomType;
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int QgsShapeFileProvider::geometryType()
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{
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return geomType;
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}
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/**
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* Return the feature type
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*/
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long QgsShapeFileProvider::featureCount(){
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return numberFeatures;
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long QgsShapeFileProvider::featureCount()
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{
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return numberFeatures;
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}
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/**
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* Return the number of fields
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*/
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int QgsShapeFileProvider::fieldCount(){
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int QgsShapeFileProvider::fieldCount()
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{
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return attributeFields.size();
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}
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/**
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* Fetch attributes for a selected feature
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*/
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void QgsShapeFileProvider::getFeatureAttributes(OGRFeature *ogrFet, QgsFeature *f){
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for (int i = 0; i < ogrFet->GetFieldCount(); i++) {
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void QgsShapeFileProvider::getFeatureAttributes(OGRFeature * ogrFet, QgsFeature * f)
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{
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for (int i = 0; i < ogrFet->GetFieldCount(); i++)
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{
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// add the feature attributes to the tree
|
||||
OGRFieldDefn *fldDef = ogrFet->GetFieldDefnRef(i);
|
||||
QString fld = fldDef->GetNameRef();
|
||||
// OGRFieldType fldType = fldDef->GetType();
|
||||
QString val;
|
||||
// add the feature attributes to the tree
|
||||
OGRFieldDefn *fldDef = ogrFet->GetFieldDefnRef(i);
|
||||
QString fld = fldDef->GetNameRef();
|
||||
// OGRFieldType fldType = fldDef->GetType();
|
||||
QString val;
|
||||
|
||||
val = ogrFet->GetFieldAsString(i);
|
||||
f->addAttribute(fld, val);
|
||||
}
|
||||
val = ogrFet->GetFieldAsString(i);
|
||||
f->addAttribute(fld, val);
|
||||
}
|
||||
}
|
||||
|
||||
std::vector<QgsField>& QgsShapeFileProvider::fields(){
|
||||
std::vector < QgsField > &QgsShapeFileProvider::fields()
|
||||
{
|
||||
return attributeFields;
|
||||
}
|
||||
|
||||
void QgsShapeFileProvider::reset(){
|
||||
void QgsShapeFileProvider::reset()
|
||||
{
|
||||
ogrLayer->SetSpatialFilter(0);
|
||||
ogrLayer->ResetReading();
|
||||
}
|
||||
|
||||
QString QgsShapeFileProvider::minValue(int position)
|
||||
{
|
||||
if(position>=fieldCount())
|
||||
if (position >= fieldCount())
|
||||
{
|
||||
std::cerr << "Warning: access requested to invalid position in QgsShapeFileProvider::minValue(..)" << std::endl;
|
||||
std::cerr << "Warning: access requested to invalid position in QgsShapeFileProvider::minValue(..)" << std::endl;
|
||||
}
|
||||
if(minmaxcachedirty)
|
||||
if (minmaxcachedirty)
|
||||
{
|
||||
fillMinMaxCash();
|
||||
fillMinMaxCash();
|
||||
}
|
||||
return QString::number(minmaxcache[position][0],'f',2);
|
||||
return QString::number(minmaxcache[position][0], 'f', 2);
|
||||
}
|
||||
|
||||
|
||||
|
||||
QString QgsShapeFileProvider::maxValue(int position)
|
||||
{
|
||||
if(position>=fieldCount())
|
||||
if (position >= fieldCount())
|
||||
{
|
||||
std::cerr << "Warning: access requested to invalid position in QgsShapeFileProvider::maxValue(..)" << std::endl;
|
||||
std::cerr << "Warning: access requested to invalid position in QgsShapeFileProvider::maxValue(..)" << std::endl;
|
||||
}
|
||||
if(minmaxcachedirty)
|
||||
if (minmaxcachedirty)
|
||||
{
|
||||
fillMinMaxCash();
|
||||
fillMinMaxCash();
|
||||
}
|
||||
return QString::number(minmaxcache[position][1],'f',2);
|
||||
return QString::number(minmaxcache[position][1], 'f', 2);
|
||||
}
|
||||
|
||||
void QgsShapeFileProvider::fillMinMaxCash()
|
||||
{
|
||||
for(int i=0;i<fieldCount();i++)
|
||||
for (int i = 0; i < fieldCount(); i++)
|
||||
{
|
||||
minmaxcache[i][0]=DBL_MAX;
|
||||
minmaxcache[i][1]=-DBL_MAX;
|
||||
minmaxcache[i][0] = DBL_MAX;
|
||||
minmaxcache[i][1] = -DBL_MAX;
|
||||
}
|
||||
|
||||
QgsFeature* f=getFirstFeature(true);
|
||||
do
|
||||
QgsFeature *f = getFirstFeature(true);
|
||||
do
|
||||
{
|
||||
for(int i=0;i<fieldCount();i++)
|
||||
{
|
||||
double value=(f->attributeMap())[i].fieldValue().toDouble();
|
||||
if(value<minmaxcache[i][0])
|
||||
{
|
||||
minmaxcache[i][0]=value;
|
||||
}
|
||||
if(value>minmaxcache[i][1])
|
||||
{
|
||||
minmaxcache[i][1]=value;
|
||||
}
|
||||
}
|
||||
}while(f=getNextFeature(true));
|
||||
for (int i = 0; i < fieldCount(); i++)
|
||||
{
|
||||
double value = (f->attributeMap())[i].fieldValue().toDouble();
|
||||
if (value < minmaxcache[i][0])
|
||||
{
|
||||
minmaxcache[i][0] = value;
|
||||
}
|
||||
if (value > minmaxcache[i][1])
|
||||
{
|
||||
minmaxcache[i][1] = value;
|
||||
}
|
||||
}
|
||||
}
|
||||
while (f = getNextFeature(true));
|
||||
|
||||
minmaxcachedirty=false;
|
||||
minmaxcachedirty = false;
|
||||
}
|
||||
|
||||
//TODO - add sanity check for shape file layers, to include cheking to
|
||||
// see if the .shp, .dbf, .shx files are all present and the layer
|
||||
// actually has features
|
||||
bool QgsShapeFileProvider::isValid(){
|
||||
return true;
|
||||
bool QgsShapeFileProvider::isValid()
|
||||
{
|
||||
return valid;
|
||||
}
|
||||
|
||||
/**
|
||||
* Class factory to return a pointer to a newly created
|
||||
* QgsShapeFileProvider object
|
||||
*/
|
||||
extern "C" QgsShapeFileProvider * classFactory(const char *uri)
|
||||
{
|
||||
return new QgsShapeFileProvider(uri);
|
||||
return new QgsShapeFileProvider(uri);
|
||||
}
|
||||
|
||||
/** Required key function (used to map the plugin to a data store type)
|
||||
*/
|
||||
extern "C" QString providerKey(){
|
||||
return QString("ogr");
|
||||
extern "C" QString providerKey()
|
||||
{
|
||||
return QString("ogr");
|
||||
}
|
||||
|
||||
/**
|
||||
* Required description function
|
||||
*/
|
||||
extern "C" QString description(){
|
||||
return QString("OGR data provider (shapefile and other formats)");
|
||||
}
|
||||
extern "C" QString description()
|
||||
{
|
||||
return QString("OGR data provider (shapefile and other formats)");
|
||||
}
|
||||
|
||||
/**
|
||||
* Required isProvider function. Used to determine if this shared library
|
||||
* is a data provider plugin
|
||||
*/
|
||||
extern "C" bool isProvider(){
|
||||
extern "C" bool isProvider()
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
@ -25,22 +25,23 @@ class OGRLayer;
|
||||
\class QgsShapeFileProvider
|
||||
\brief Data provider for ESRI shapefiles
|
||||
*/
|
||||
class QgsShapeFileProvider : public QgsDataProvider {
|
||||
class QgsShapeFileProvider:public QgsDataProvider
|
||||
{
|
||||
public:
|
||||
QgsShapeFileProvider(QString uri=0);
|
||||
virtual ~QgsShapeFileProvider();
|
||||
QgsShapeFileProvider(QString uri = 0);
|
||||
virtual ~ QgsShapeFileProvider();
|
||||
/**
|
||||
* Get the first feature resutling from a select operation
|
||||
* @return QgsFeature
|
||||
*/
|
||||
QgsFeature * getFirstFeature(bool fetchAttributes=false);
|
||||
/**
|
||||
QgsFeature *getFirstFeature(bool fetchAttributes = false);
|
||||
/**
|
||||
* Get the next feature resutling from a select operation
|
||||
* @return QgsFeature
|
||||
*/
|
||||
QgsFeature * getNextFeature(bool fetchAttributes=false);
|
||||
|
||||
/** Get the feature type. This corresponds to
|
||||
QgsFeature *getNextFeature(bool fetchAttributes = false);
|
||||
|
||||
/** Get the feature type. This corresponds to
|
||||
WKBPoint,
|
||||
WKBLineString,
|
||||
WKBPolygon,
|
||||
@ -49,96 +50,96 @@ public:
|
||||
WKBMultiPolygon
|
||||
* as defined in qgis.h
|
||||
*/
|
||||
int geometryType();
|
||||
int geometryType();
|
||||
/**
|
||||
* Get the number of features in the layer
|
||||
*/
|
||||
long featureCount();
|
||||
long featureCount();
|
||||
/**
|
||||
* Get the number of fields in the layer
|
||||
*/
|
||||
int fieldCount();
|
||||
/**
|
||||
int fieldCount();
|
||||
/**
|
||||
* Select features based on a bounding rectangle. Features can be retrieved
|
||||
* with calls to getFirstFeature and getNextFeature.
|
||||
* @param mbr QgsRect containing the extent to use in selecting features
|
||||
*/
|
||||
void select(QgsRect *mbr, bool useIntersect=false);
|
||||
/**
|
||||
void select(QgsRect * mbr, bool useIntersect = false);
|
||||
/**
|
||||
* Set the data source specification. This may be a path or database
|
||||
* connection string
|
||||
* @uri data source specification
|
||||
*/
|
||||
void setDataSourceUri(QString uri);
|
||||
|
||||
/**
|
||||
void setDataSourceUri(QString uri);
|
||||
|
||||
/**
|
||||
* Get the data source specification. This may be a path or database
|
||||
* connection string
|
||||
* @return data source specification
|
||||
*/
|
||||
QString getDataSourceUri();
|
||||
|
||||
/**
|
||||
QString getDataSourceUri();
|
||||
|
||||
/**
|
||||
* Identify features within the search radius specified by rect
|
||||
* @param rect Bounding rectangle of search radius
|
||||
* @return std::vector containing QgsFeature objects that intersect rect
|
||||
*/
|
||||
virtual std::vector<QgsFeature>& identify(QgsRect *rect);
|
||||
virtual std::vector < QgsFeature > &identify(QgsRect * rect);
|
||||
|
||||
/** Return endian-ness for this layer
|
||||
*/
|
||||
int endian();
|
||||
*/
|
||||
int endian();
|
||||
|
||||
/** Return the extent for this data layer
|
||||
*/
|
||||
virtual QgsRect * extent();
|
||||
virtual QgsRect *extent();
|
||||
/**
|
||||
* Get the attributes associated with a feature
|
||||
*/
|
||||
void getFeatureAttributes(OGRFeature *ogrFet, QgsFeature *f);
|
||||
void getFeatureAttributes(OGRFeature * ogrFet, QgsFeature * f);
|
||||
/**
|
||||
* Get the field information for the layer
|
||||
*/
|
||||
std::vector<QgsField>& fields();
|
||||
|
||||
/* Reset the layer - for an OGRLayer, this means clearing the
|
||||
* spatial filter and calling ResetReading
|
||||
*/
|
||||
void reset();
|
||||
std::vector < QgsField > &fields();
|
||||
|
||||
/* Reset the layer - for an OGRLayer, this means clearing the
|
||||
* spatial filter and calling ResetReading
|
||||
*/
|
||||
void reset();
|
||||
|
||||
/**Returns the minimum value of an attribut
|
||||
@param position the number of the attribute*/
|
||||
QString minValue(int position);
|
||||
QString minValue(int position);
|
||||
|
||||
/**Returns the maximum value of an attribut
|
||||
@param position the number of the attribute*/
|
||||
QString maxValue(int position);
|
||||
QString maxValue(int position);
|
||||
|
||||
/**Returns true if this is a valid shapefile
|
||||
*/
|
||||
bool isValid();
|
||||
|
||||
bool isValid();
|
||||
|
||||
private:
|
||||
unsigned char *getGeometryPointer(OGRFeature *fet);
|
||||
std::vector<QgsField> attributeFields;
|
||||
QString dataSourceUri;
|
||||
OGRDataSource *ogrDataSource;
|
||||
OGREnvelope *extent_;
|
||||
OGRLayer *ogrLayer;
|
||||
bool valid;
|
||||
int geomType;
|
||||
long numberFeatures;
|
||||
enum ENDIAN
|
||||
{
|
||||
NDR = 1,
|
||||
XDR = 0
|
||||
};
|
||||
/**Flag indicating, if the minmaxcache should be renewed (true) or not (false)*/
|
||||
bool minmaxcachedirty;
|
||||
/**Matrix storing the minimum and maximum values*/
|
||||
double** minmaxcache;
|
||||
/**Fills the cash and sets minmaxcachedirty to false*/
|
||||
void fillMinMaxCash();
|
||||
|
||||
|
||||
unsigned char *getGeometryPointer(OGRFeature * fet);
|
||||
std::vector < QgsField > attributeFields;
|
||||
QString dataSourceUri;
|
||||
OGRDataSource *ogrDataSource;
|
||||
OGREnvelope *extent_;
|
||||
OGRLayer *ogrLayer;
|
||||
bool valid;
|
||||
int geomType;
|
||||
long numberFeatures;
|
||||
enum ENDIAN
|
||||
{
|
||||
NDR = 1,
|
||||
XDR = 0
|
||||
};
|
||||
/**Flag indicating, if the minmaxcache should be renewed (true) or not (false)*/
|
||||
bool minmaxcachedirty;
|
||||
/**Matrix storing the minimum and maximum values*/
|
||||
double **minmaxcache;
|
||||
/**Fills the cash and sets minmaxcachedirty to false*/
|
||||
void fillMinMaxCash();
|
||||
|
||||
|
||||
};
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user