From 81c774fcf40341bd2b8cce93b5d408801fc3e90a Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Wed, 26 Jul 2017 14:48:43 -0700
Subject: [PATCH] Add copy pasting to history.

---
 src/org/nwapw/abacus/window/Window.java | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/org/nwapw/abacus/window/Window.java b/src/org/nwapw/abacus/window/Window.java
index 62ab4ad..cfbcd8f 100644
--- a/src/org/nwapw/abacus/window/Window.java
+++ b/src/org/nwapw/abacus/window/Window.java
@@ -6,6 +6,9 @@ import org.nwapw.abacus.tree.TreeNode;
 
 import javax.swing.*;
 import java.awt.*;
+import java.awt.datatransfer.StringSelection;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
 
 /**
  * The main UI window for the calculator.
@@ -177,5 +180,17 @@ public class Window extends JFrame {
             lastOutputArea.setText(lastOutput);
             inputField.setText(lastOutput);
         });
+        historyTable.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                Point clickPoint = e.getPoint();
+                if(e.getClickCount() == 2){
+                    int row = historyTable.rowAtPoint(clickPoint);
+                    int column = historyTable.columnAtPoint(clickPoint);
+                    String toCopy = historyTable.getValueAt(row, column).toString();
+                    Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new StringSelection(toCopy), null);
+                }
+            }
+        });
     }
 }