/*=============================================================================
  
  Project:   SharpImage
  Module:    siFormFlowLayout.cs
  Language:  C#
  Author:    Dan Mueller
  Date:      $Date$
  Revision:  $Revision$

  Copyright (c) Queensland University of Technology (QUT) 2008.
  All rights reserved.

  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the above copyright notices for more information.
  
=============================================================================*/

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using SharpImage.Rendering;
using IronPython.Runtime.Calls;

namespace SharpImage.Forms
{
    public partial class siFormFlowLayout : siFormTool
    {
        #region Construction and Disposal
        //=====================================================================
        /// <summary>
        /// Default constructor
        /// </summary>
        public siFormFlowLayout()
        {
            // Initialise
            InitializeComponent();
        }
        //=====================================================================
        #endregion

        #region Properties
        //=====================================================================
        private Dictionary<Guid, CallTarget1> m_HandlersCallTarget1 = new Dictionary<Guid, CallTarget1>();
        private Dictionary<Guid, CallTarget2> m_HandlersCallTarget2 = new Dictionary<Guid, CallTarget2>();
        //=====================================================================
        #endregion

        #region Public Methods
        //=====================================================================
        /// <summary>
        /// Adds a panel underneath the current panels with the given control.
        /// To add multiple controls, places them in a panel, and then add the panel.
        /// If control is null, a blank panel (separator) is added.
        /// </summary>
        /// <param name="height"></param>
        /// <param name="control"></param>
        public void AddCustomControl(int height, Control control)
        {
            Panel panel = new Panel();
            panel.Size = new Size(400, height);
            panel.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
            if (control != null) panel.Controls.Add(control);
            panel.Dock = DockStyle.Top;
            this.Controls.Add(panel);
            this.Controls.SetChildIndex(panel, 0);
        }

        /// <summary>
        /// Adds a panel underneath the current panels with the given control.
        /// To add multiple controls, places them in a panel, and then add the panel.
        /// If control is null, a blank panel (separator) is added.
        /// The default height of 48 pixels is used.
        /// </summary>
        /// <param name="control"></param>
        public void AddCustomControl(Control control)
        {
            this.AddCustomControl(48, control);
        }

        /// <summary>
        /// Adds a panel with a button underneath the current panels.
        /// The handler must be compatiable with the EventHandler delegate
        /// (void (object, EventArgs) handler).
        /// The handler function is called when the button is clicked.
        /// </summary>
        /// <param name="name"></param>
        /// <param name="handler"></param>
        public void AddButton(String name, CallTarget2 handler)
        {
            Button button = new Button();
            button.Name = name.Replace(" ", "").Replace("(","").Replace(")","");
            button.Text = name;
            button.Location = new Point(6, 6);
            button.FlatStyle = FlatStyle.Flat;
            button.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
            button.Click += new EventHandler(OnButtonClicked);
            Guid key = Guid.NewGuid();
            button.Tag = key;
            this.m_HandlersCallTarget2.Add(key, handler);
            this.AddCustomControl(30, button);
            button.Size = new Size(this.ClientSize.Width-12, 24);
        }

                /// <summary>
        /// Adds a panel with a textbox and button with an ellipse which
        /// launches an open file dialog box. Once a valid (existing) file
        /// has been selected, the handler function (which must be of the form
        /// void (String) handler) is called with the full path of the selected
        /// file as the first argument.
        /// A label describing the textbox is not shown by default.
        /// </summary>
        /// <param name="handler"></param>
        public void AddOpenFile(CallTarget1 handler)
        {
            this.AddOpenFile(null, handler);
        }

        /// <summary>
        /// Adds a panel with a textbox and button with an ellipse which
        /// launches an open file dialog box. Once a valid (existing) file
        /// has been selected, the handler function (which must be of the form
        /// void (String) handler) is called with the full path of the selected
        /// file as the first argument.
        /// </summary>
        /// <param name="strlabel"></param>
        /// <param name="handler"></param>
        public void AddOpenFile(String strlabel, CallTarget1 handler)
        {
            // Create label
            Label label = new Label();
            bool showlabel = (strlabel != null && strlabel.Length > 0);
            if (showlabel) label.Text = strlabel.Replace(":", "") + ":";
            label.Location = new Point(6, 10);
            label.Anchor = AnchorStyles.Top | AnchorStyles.Left;

            // Create textbox
            TextBox txtpath = new TextBox();
            if (showlabel) txtpath.Location = new Point(40, 6);
            else txtpath.Location = new Point(6, 6);
            txtpath.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
            txtpath.BorderStyle = BorderStyle.FixedSingle;

            // Create button
            Button cmdopen = new Button();
            cmdopen.Text = "...";
            cmdopen.Size = new Size(30, 21);
            cmdopen.Anchor = AnchorStyles.Top | AnchorStyles.Right;
            cmdopen.FlatStyle = FlatStyle.Flat;
            cmdopen.Click += new EventHandler(OnFileOpenClick);
            Guid key = Guid.NewGuid();
            cmdopen.Tag = key;
            this.m_HandlersCallTarget1.Add(key, handler);
            
            // Creating container
            Panel panel = new Panel();
            panel.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
            panel.Controls.Add(cmdopen);
            panel.Controls.Add(txtpath);
            if (showlabel) panel.Controls.Add(label);
            this.AddCustomControl(30, panel);

            // Set sizes
            panel.Size = new Size(this.ClientSize.Width - 12, 30);
            if (showlabel) txtpath.Size = new Size(this.ClientSize.Width - 90, 22);
            else txtpath.Size = new Size(this.ClientSize.Width - 50, 22);
            cmdopen.Location = new Point(this.ClientSize.Width - 42, 6);
        }

        //=====================================================================
        #endregion
        
        #region Private Methods
        //=====================================================================
        void OnFileOpenClick(object sender, EventArgs e)
        {
            // Lose focus
            this.Focus();

            // Test sender is valid
            if (!(sender is Control)) return;
            Control control = sender as Control;

            // Test tag is valid Guid
            if (control.Tag == null) return;
            if (!(control.Tag is Guid)) return;
            Guid key = (Guid)control.Tag;

            // Show the open file dialog
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.CheckFileExists = true;
            dialog.CheckPathExists = true;
            dialog.Multiselect = false;
            dialog.RestoreDirectory = true;
            dialog.Title = "Please browse for file";
            DialogResult result = dialog.ShowDialog();
            if (result != DialogResult.OK) return;

            // Invoke appropriate handler
            if (this.m_HandlersCallTarget1.ContainsKey(key))
            {
                control.Parent.Controls[1].Text = dialog.FileName;
                this.m_HandlersCallTarget1[key].Invoke(dialog.FileName);
            }
        }
        
        private void OnButtonClicked(object sender, EventArgs args)
        {
            // Lose focus
            this.Focus();
            
            // Test sender is valid
            if (!(sender is Control)) return;
            Control control = sender as Control;

            // Test tag is valid Guid
            if (control.Tag == null) return;
            if (!(control.Tag is Guid)) return;
            Guid key = (Guid)control.Tag;

            // Invoke appropriate handler
            if (this.m_HandlersCallTarget2.ContainsKey(key))
                this.m_HandlersCallTarget2[key].Invoke(sender, args);
        }
        //=====================================================================
        #endregion
    }
}