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Posted 22 Apr 2012

Visual AST for ANTLR Generated Parser Output

, 17 May 2012 CPOL
Build a visual AST from ANTLR parser
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Antlr.Runtime;
using EntMapping.Utility;

namespace EntMapping
    public partial class FormTest : Form
        public FormTest()

        private void FormTest_Load(object sender, EventArgs e)
            textBoxInput.Text = new Sampler().GetSample();
            pictureBox1.Size = new Size(1207, 388);

        private void buttonParse_Click(object sender, EventArgs e)
            string inputString = textBoxInput.Text;
            var input = new ANTLRStringStream(inputString);
            var lexer = new EntityMappingLexer(input);
            var tokens = new CommonTokenStream(lexer);
            var parser = new EntityMappingParser(tokens);
            var result = parser.prog();
            var tree = result.Tree;
            textBoxStringTree.Text = tree.ToStringTree();

            var treeNodeDrawable = new ASTTreeNode(tree);
            int center;
            if (pictureBox1.Image != null)
                pictureBox1.Image = null;
            Image image = new VisualAST(treeNodeDrawable).Draw();
            pictureBox1.Image = image;


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About the Author

Matthew So (Hong Kong)
Founder Software Force
Hong Kong Hong Kong
I am always interested in finding innovative ways for building better applications and founded a technology company since 2003. Welcome to exchange any idea with you and if I am not too busy before deadline of projects, I will reply your emails. Also, if you willing to pay for consulting works and customized software development, you can leave me message.

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