Export functionality for transaction list

src/qt/csvmodelwriter.cpp

@@ -0,0 +1,83 @@
+#include "csvmodelwriter.h"
+
+#include <QAbstractItemModel>
+#include <QFile>
+#include <QTextStream>
+
+CSVModelWriter::CSVModelWriter(const QString &filename, QObject *parent) :
+    QObject(parent),
+    filename(filename)
+{
+}
+
+void CSVModelWriter::setModel(const QAbstractItemModel *model)
+{
+    this->model = model;
+}
+
+void CSVModelWriter::addColumn(const QString &title, int column, int role)
+{
+    Column col;
+    col.title = title;
+    col.column = column;
+    col.role = role;
+
+    columns.append(col);
+}
+
+static void writeValue(QTextStream &f, const QString &value)
+{
+    // TODO: quoting if " or \n in string
+    f << "\"" << value << "\"";
+}
+
+static void writeSep(QTextStream &f)
+{
+    f << ",";
+}
+
+static void writeNewline(QTextStream &f)
+{
+    f << "\n";
+}
+
+bool CSVModelWriter::write()
+{
+    QFile file(filename);
+    if(!file.open(QIODevice::WriteOnly | QIODevice::Text))
+        return false;
+    QTextStream out(&file);
+
+    int numRows = model->rowCount();
+
+    // Header row
+    for(int i=0; i<columns.size(); ++i)
+    {
+        if(i!=0)
+        {
+            writeSep(out);
+        }
+        writeValue(out, columns[i].title);
+    }
+    writeNewline(out);
+
+    // Data rows
+    for(int j=0; j<numRows; ++j)
+    {
+        for(int i=0; i<columns.size(); ++i)
+        {
+            if(i!=0)
+            {
+                writeSep(out);
+            }
+            QVariant data = model->index(j, columns[i].column).data(columns[i].role);
+            writeValue(out, data.toString());
+        }
+        writeNewline(out);
+    }
+
+    file.close();
+
+    return file.error() == QFile::NoError;
+}
+