Ejemplos de CSG_Grid::Set_Index en C++ (Cpp)

Ejemplo n.º 1

Archivo: GridsFromTableAndGrid.cpp Proyecto: Fooway/SAGA-GIS-git-mirror

//---------------------------------------------------------
bool CGridsFromTableAndGrid::On_Execute(void)
{
	int						iField, iRecord, iAttribute, nAttributes, *Attribute;
	sLong					iCell, jCell;
	CSG_Parameter_Grid_List	*pGrids;
	CSG_Grid				*pClasses;
	CSG_Table				*pTable;

	//-----------------------------------------------------
	pClasses	= Parameters("CLASSES" )->asGrid();
	pGrids		= Parameters("GRIDS"   )->asGridList();
	pTable		= Parameters("TABLE"   )->asTable();
	iField		= Parameters("ID_FIELD")->asInt();

	pGrids->Del_Items();

	if( !pClasses->Set_Index() )
	{
		Error_Set(_TL("index creation failed"));

		return( false );
	}

	//-----------------------------------------------------
	if( pTable->Get_Field_Count() == 0 || pTable->Get_Count() == 0 )
	{
		Message_Add(_TL("selected table contains no valid records"));

		return( false );
	}

	//-----------------------------------------------------
	if( !pTable->Set_Index(iField, TABLE_INDEX_Ascending) )
	{
		Message_Add(_TL("failed to create index for table"));

		return( false );
	}

	//-----------------------------------------------------
	Attribute	= new int[pTable->Get_Field_Count()];

	for(iAttribute=0, nAttributes=0; iAttribute<pTable->Get_Field_Count(); iAttribute++)
	{
		if( iAttribute != iField && pTable->Get_Field_Type(iAttribute) != SG_DATATYPE_String )
		{
			Attribute[nAttributes++]	= iAttribute;

			CSG_Grid	*pGrid	= SG_Create_Grid(*Get_System());

			pGrid->Set_Name(CSG_String::Format(SG_T("%s [%s]"), pClasses->Get_Name(), pTable->Get_Field_Name(iAttribute)));

			pGrids->Add_Item(pGrid);
		}
	}

	if( nAttributes == 0 )
	{
		delete[](Attribute);

		Message_Add(_TL("selected table does not have numeric attributes"));

		return( false );
	}

	//-----------------------------------------------------
	CSG_Table_Record	*pRecord	= pTable->Get_Record_byIndex(0);

	for(iCell=0, iRecord=0; iCell<Get_NCells() && pRecord && Set_Progress_NCells(iCell); iCell++)
	{
		if( pClasses->Get_Sorted(iCell, jCell, false, true) )
		{
			double	valClass	= pClasses->asDouble(jCell);

			while( pRecord && pRecord->asDouble(iField) < valClass )
			{
				pRecord	= pTable->Get_Record_byIndex(++iRecord);
			}

			if( !pRecord || pRecord->asDouble(iField) > valClass )
			{
				for(iAttribute=0; iAttribute<nAttributes; iAttribute++)
				{
					pGrids->asGrid(iAttribute)->Set_NoData(jCell);
				}
			}
			else
			{
				for(iAttribute=0; iAttribute<nAttributes; iAttribute++)
				{
					pGrids->asGrid(iAttribute)->Set_Value(jCell, pRecord->asDouble(Attribute[iAttribute]));
				}
			}
		}
	}

	//-----------------------------------------------------
	delete[](Attribute);

	return true;
}