Dear QGIS Gurus:
I have a written a plugin that updates an attribute of a shape file and it
tells me it ran fine and yet, I am not able to see the changes in the attribute
table once the program finishes. I am using QGIS 1.6 Copiapo on Windows). I am
compiling using the 1.7 source, but I have tried using the trunk version and it
does not seem to matter at all.
I can see the edit starting with all the extent selected and it finishes
without an error. I also write a log file before and after the feature
attribute change and the feature values change correctly.
What am i doing wrong?
The simplified code is posted below,
QgsVectorDataProvider* vProvider = theVectorLayer->dataProvider();
theVectorLayer->select(vProvider->attributeIndexes(),
theVectorLayer->extent(), true, false);
QgsFeature currentFeature;
QgsGeometry* currentGeometry = 0;
bool blnEdit = theVectorLayer->startEditing();
QgsAttributeList attrList = vProvider->attributeIndexes();
vProvider->select(attrList);
blnFeat = vProvider->nextFeature(currentFeature);
QgsAttributeMap atMap1;
vProvider->createSpatialIndex();
QgsAttributeList attrList = vProvider->attributeIndexes();
vProvider->select(attrList);
blnFeat = vProvider->nextFeature(currentFeature);
QgsAttributeMap atMap1;
QString featureAttributesString;
int ltsVal = 10;
int ltsFldIdx = 1;
QVariant fld0 ;
while(blnFeat)
{
atMap1 = currentFeature.attributeMap();
fld0 = atMap1.value(0);
currentGeometry = currentFeature.geometry();
if(!currentGeometry)
{
continue;
}
else
{
currentFeature.changeAttribute(ltsFldIdx,QVariant(ltsVal));
}
blnFeat = vProvider->nextFeature(currentFeature);
}
blnAttrAdded = theVectorLayer->commitChanges();
theVectorLayer->endEditCommand();
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