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/*
/ ExportXLSX.cpp
/ exporting MS Excell spradsheets (xlsx)
/
/ version 2.1, 2020 May 9
/
/ Author: Sandro Furieri a.furieri@lqt.it
/
/ Copyright (C) 2020-2020 Alessandro Furieri
/
/ This program is free software: you can redistribute it and/or modify
/ it under the terms of the GNU General Public License as published by
/ the Free Software Foundation, either version 3 of the License, or
/ (at your option) any later version.
/
/ This program is distributed in the hope that it will be useful,
/ but WITHOUT ANY WARRANTY; without even the implied warranty of
/ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
/ GNU General Public License for more details.
/
/ You should have received a copy of the GNU General Public License
/ along with this program. If not, see <http://www.gnu.org/licenses/>.
/
*/
#include "Classdef.h"
#ifdef ENABLE_XLSXWRITER // only if XlsxWriter is supported
#include <xlsxwriter.h>
void MyFrame::DoExportXLSX(wxString & path, wxString & sql)
{
//
// attenting to export a ResultSet as a MS Excell Spreadsheet (xlsx)
//
int ret;
sqlite3_stmt *stmt = NULL;
int error = 0;
int i_col;
int xlsx_row;
lxw_workbook *workbook = NULL;
lxw_worksheet *worksheet = NULL;
lxw_format *fmt_title;
lxw_format *fmt_text;
lxw_format *fmt_integer;
lxw_format *fmt_double;
lxw_format *fmt_null;
char *x_path;
char *sql_stmt = (char *) malloc((sql.Len() * 4) + 1);
strcpy(sql_stmt, sql.ToUTF8());
// preparing the SQL statement
ret =
sqlite3_prepare_v2(SqliteHandle, sql_stmt, strlen(sql_stmt), &stmt, NULL);
free(sql_stmt);
if (ret != SQLITE_OK)
{
const char *msg = sqlite3_errmsg(SqliteHandle);
wxMessageBox(wxT("XLSX SQL ERRORs: ") +
wxString::FromUTF8(msg), wxT("spatialite_gui"),
wxOK | wxICON_ERROR, this);
return;
}
// preparing the XLSX objects
x_path = (char *) malloc((path.Len() * 4) + 1);
strcpy(x_path, path.ToUTF8());
workbook = workbook_new(x_path);
free(x_path);
fmt_title = workbook_add_format(workbook);
format_set_align(fmt_title, LXW_ALIGN_LEFT);
format_set_bg_color(fmt_title, 0xFFFFDF);
format_set_bold(fmt_title);
format_set_border(fmt_title, LXW_BORDER_THIN);
fmt_text = workbook_add_format(workbook);
format_set_align(fmt_text, LXW_ALIGN_LEFT);
format_set_border(fmt_text, LXW_BORDER_THIN);
fmt_integer = workbook_add_format(workbook);
format_set_num_format(fmt_integer, "#,##0");
format_set_align(fmt_integer, LXW_ALIGN_RIGHT);
format_set_border(fmt_integer, LXW_BORDER_THIN);
fmt_double = workbook_add_format(workbook);
format_set_num_format(fmt_double, "#,##0.00");
format_set_align(fmt_double, LXW_ALIGN_RIGHT);
format_set_border(fmt_double, LXW_BORDER_THIN);
fmt_null = workbook_add_format(workbook);
format_set_border(fmt_null, LXW_BORDER_THIN);
worksheet = workbook_add_worksheet(workbook, "ResultSet");
for (i_col = 0; i_col < sqlite3_column_count(stmt); i_col++)
{
// exporting column headers into the XLSX spreadsheet
const char *col_name = sqlite3_column_name(stmt, i_col);
worksheet_write_string(worksheet, 0, i_col, col_name, fmt_title);
}
xlsx_row = 1;
while (1)
{
ret = sqlite3_step(stmt);
if (ret == SQLITE_DONE)
break;
if (ret == SQLITE_ROW)
{
// a new row starts here
for (i_col = 0; i_col < sqlite3_column_count(stmt); i_col++)
{
// exporting column values into the XLSX spreadsheet
const char *txt_value;
int int_value;
double dbl_value;
int bytes;
char blob[128];
switch (sqlite3_column_type(stmt, i_col))
{
case SQLITE_TEXT:
txt_value = (const char *) sqlite3_column_text(stmt, i_col);
worksheet_write_string(worksheet, xlsx_row, i_col,
txt_value, fmt_text);
break;
case SQLITE_INTEGER:
int_value = sqlite3_column_int(stmt, i_col);
worksheet_write_number(worksheet, xlsx_row, i_col,
int_value, fmt_integer);
break;
case SQLITE_FLOAT:
dbl_value = sqlite3_column_double(stmt, i_col);
worksheet_write_number(worksheet, xlsx_row, i_col,
dbl_value, fmt_double);
break;
case SQLITE_BLOB:
bytes = sqlite3_column_bytes(stmt, i_col);
sprintf(blob, "BLOB [%d bytes]", bytes);
worksheet_write_string(worksheet, xlsx_row, i_col, blob,
fmt_text);
break;
case SQLITE_NULL:
default:
worksheet_write_string(worksheet, xlsx_row, i_col, "",
fmt_null);
break;
};
}
xlsx_row++;
} else
{
error = 1;
goto stop;
}
}
stop:
if (error)
{
wxString msg = wxT("Some unexpected error occurred\n\n"
"The output spreadsheet may easily be corrupted\n");
wxMessageBox(msg, wxT("spatialite_gui"), wxOK | wxICON_ERROR, this);
} else
{
char *xmsg =
sqlite3_mprintf("Exported %d rows into Spreadsheet", xlsx_row);
wxString msg = wxString::FromUTF8(xmsg);
sqlite3_free(xmsg);
wxMessageBox(msg, wxT("spatialite_gui"), wxOK | wxICON_INFORMATION, this);
}
workbook_close(workbook);
}
#endif // end XlsxWriter
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