using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;


namespace RegexBuddyRegexClientDemo
{
	/// <summary>
	/// Summary description for WinForm.
	/// </summary>
	public class FormRegexDemo : System.Windows.Forms.Form
	{
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;
		private System.Windows.Forms.TextBox textRegex;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.RadioButton radioAsIs;
		private System.Windows.Forms.RadioButton radioC;
		private System.Windows.Forms.RadioButton radioPascal;
		private System.Windows.Forms.RadioButton radioPerl;
		private System.Windows.Forms.RadioButton radioPerlOp;
		private System.Windows.Forms.RadioButton radioBasic;
		private System.Windows.Forms.Button btnInvoke;

		public FormRegexDemo()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose (bool disposing)
		{
			if (disposing)
			{
				if (components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose(disposing);
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.textRegex = new System.Windows.Forms.TextBox();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.radioBasic = new System.Windows.Forms.RadioButton();
			this.radioPerlOp = new System.Windows.Forms.RadioButton();
			this.radioPerl = new System.Windows.Forms.RadioButton();
			this.radioPascal = new System.Windows.Forms.RadioButton();
			this.radioC = new System.Windows.Forms.RadioButton();
			this.radioAsIs = new System.Windows.Forms.RadioButton();
			this.btnInvoke = new System.Windows.Forms.Button();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// textRegex
			// 
			this.textRegex.Location = new System.Drawing.Point(8, 8);
			this.textRegex.Multiline = true;
			this.textRegex.Name = "textRegex";
			this.textRegex.Size = new System.Drawing.Size(448, 80);
			this.textRegex.TabIndex = 0;
			this.textRegex.Text = "regular expression or string";
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.radioBasic);
			this.groupBox1.Controls.Add(this.radioPerlOp);
			this.groupBox1.Controls.Add(this.radioPerl);
			this.groupBox1.Controls.Add(this.radioPascal);
			this.groupBox1.Controls.Add(this.radioC);
			this.groupBox1.Controls.Add(this.radioAsIs);
			this.groupBox1.Location = new System.Drawing.Point(8, 96);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(256, 168);
			this.groupBox1.TabIndex = 1;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "Text Style";
			// 
			// radioBasic
			// 
			this.radioBasic.Location = new System.Drawing.Point(16, 144);
			this.radioBasic.Name = "radioBasic";
			this.radioBasic.Size = new System.Drawing.Size(232, 16);
			this.radioBasic.TabIndex = 5;
			this.radioBasic.Text = "Basic string";
			// 
			// radioPerlOp
			// 
			this.radioPerlOp.Location = new System.Drawing.Point(16, 120);
			this.radioPerlOp.Name = "radioPerlOp";
			this.radioPerlOp.Size = new System.Drawing.Size(232, 16);
			this.radioPerlOp.TabIndex = 4;
			this.radioPerlOp.Text = "Perl operator";
			// 
			// radioPerl
			// 
			this.radioPerl.Location = new System.Drawing.Point(16, 96);
			this.radioPerl.Name = "radioPerl";
			this.radioPerl.Size = new System.Drawing.Size(232, 16);
			this.radioPerl.TabIndex = 3;
			this.radioPerl.Text = "Perl string";
			// 
			// radioPascal
			// 
			this.radioPascal.Location = new System.Drawing.Point(16, 72);
			this.radioPascal.Name = "radioPascal";
			this.radioPascal.Size = new System.Drawing.Size(232, 16);
			this.radioPascal.TabIndex = 2;
			this.radioPascal.Text = "Pascal string";
			// 
			// radioC
			// 
			this.radioC.Location = new System.Drawing.Point(16, 48);
			this.radioC.Name = "radioC";
			this.radioC.Size = new System.Drawing.Size(232, 16);
			this.radioC.TabIndex = 1;
			this.radioC.Text = "C string";
			// 
			// radioAsIs
			// 
			this.radioAsIs.Checked = true;
			this.radioAsIs.Location = new System.Drawing.Point(16, 24);
			this.radioAsIs.Name = "radioAsIs";
			this.radioAsIs.Size = new System.Drawing.Size(232, 16);
			this.radioAsIs.TabIndex = 0;
			this.radioAsIs.TabStop = true;
			this.radioAsIs.Text = "As is";
			// 
			// btnInvoke
			// 
			this.btnInvoke.Location = new System.Drawing.Point(272, 104);
			this.btnInvoke.Name = "btnInvoke";
			this.btnInvoke.Size = new System.Drawing.Size(184, 24);
			this.btnInvoke.TabIndex = 2;
			this.btnInvoke.Text = "Invoke RegexBuddy";
			this.btnInvoke.Click += new System.EventHandler(this.btnInvoke_Click);
			// 
			// FormRegexDemo
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(464, 270);
			this.Controls.Add(this.btnInvoke);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.textRegex);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
			this.MaximizeBox = false;
			this.Name = "FormRegexDemo";
			this.Text = "RegexBuddy Regex Client Demo";
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);
		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new FormRegexDemo());
		}

		[DllImport("user32.dll")]
		public static extern bool SetForegroundWindow(uint hwnd);

		// We maintain only one connection to RegexBuddy for the entire application using static members
		// If an application creates more than one connection, it will launch more than once instance of RegexBuddy
		// Note that even if the user closes the instance of RegexBuddy created by our connection,
		// that instance will still remain resident in the background, until our application closes.
		// Each call to InitRegex will reuse the same instance of RegexBuddy launched by our connection.
		static RegexBuddy.RegexBuddyIntfClass RegexBuddyConnection;

		// Since we use one connection for the entire application, we need to remember in which context
		// we called InitRegex, so we know how to handle FinishRegex.
		static TextBox ActiveRegexBox;

		static void FinishRegex(string Regex, uint StringType)
		{
			if (ActiveRegexBox != null) {
				// Retrieve the updated regex from RegexBuddy
				ActiveRegexBox.Text = Regex;
				// FinishRegex is only called once per call to InitRegex
				// So we should clean up this static reference
				ActiveRegexBox = null;
			}
		}

		private void btnInvoke_Click(object sender, System.EventArgs e)
		{
			if (RegexBuddyConnection == null) {
				// Connect to RegexBuddy
				try {
					RegexBuddyConnection = new RegexBuddy.RegexBuddyIntfClass();
				} catch (Exception ex) {
					MessageBox.Show("Could not connect to RegexBuddy because of the following error:\r\n" +
									ex.Message + "\r\n\r\n" +
									"Make sure that RegexBuddy is installed on your computer, and has been run at least once.",
									"Invoke RegexBuddy");
					return;
				}
				// Connect FinishRegex event handler
				// Note: RegexBuddy supports only a single event handler per client connection
				// Therefore, you cannot handle both the FinishRegex and FinishAction events
				// using the event connection method used here
				RegexBuddy.IRegexBuddyIntfEvents_FinishRegexEventHandler FinishRegexEventHandler =
					new RegexBuddy.IRegexBuddyIntfEvents_FinishRegexEventHandler(FinishRegex);
				RegexBuddyConnection.FinishRegex += FinishRegexEventHandler;
				// Make sure our instance of RegexBuddy makes it clear to the user that we're connected to it
				RegexBuddyConnection.IndicateApp(Text, (uint)Handle);
			}
			// Since we use one connection for the entire application, we need to remember in which context
			// we called InitRegex, so we know how to handle FinishRegex.
			ActiveRegexBox = textRegex;
			// Send regex or string with regex to RegexBuddy
			uint StringType = 0;
			if (radioC.Checked) {
				StringType = 1;
			} else if (radioPascal.Checked) {
				StringType = 2;
			} else if (radioPerl.Checked) {
				StringType = 3;
			} else if (radioPerlOp.Checked) {
				StringType = 4;
			} else if (radioBasic.Checked) {
				StringType = 5;
			}
			RegexBuddyConnection.InitRegex(textRegex.Text, StringType);
			// Bring RegexBuddy to front.
			// SetForegroundWindow only works when the calling thread has input focus.
			// Since we have input focus when the user clicked our button,
			// it is our job to bring RegexBuddy to front.
            SetForegroundWindow(RegexBuddyConnection.GetWindowHandle());
		}
	}
}