Copy amount to clipboard (implements #657)

- Also, unify similar code related to copying transaction fields to clipboard

src/qt/guiutil.cpp

@@ -12,6 +12,9 @@
 #include <QLineEdit>
 #include <QUrl>
 #include <QTextDocument> // For Qt::escape
+#include <QAbstractItemView>
+#include <QApplication>
+#include <QClipboard>
 
 QString GUIUtil::dateTimeStr(qint64 nTime)
 {
@@ -88,3 +91,16 @@ QString GUIUtil::HtmlEscape(const std::string& str, bool fMultiLine)
 {
     return HtmlEscape(QString::fromStdString(str), fMultiLine);
 }
+
+void GUIUtil::copyEntryData(QAbstractItemView *view, int column, int role)
+{
+    if(!view || !view->selectionModel())
+        return;
+    QModelIndexList selection = view->selectionModel()->selectedRows(column);
+
+    if(!selection.isEmpty())
+    {
+        // Copy first item
+        QApplication::clipboard()->setText(selection.at(0).data(role).toString());
+    }
+}