// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2006, Alexander Olk
//
// Authors:
//	Alexander Olk	alex.olk@googlemail.com
//
//

// NOT COMPLETE - work in progress

// changed (simplified) by Alexander Tsyganenko

using System.Collections;
using System.ComponentModel;
using System.Drawing;

namespace System.Windows.Forms
{
    public class FontDialog : CommonDialog
    {
        protected static readonly object EventApply = new object();

        private Font font;
        private Color color = Color.Black;
        private bool allowSimulations = true;
        private bool allowVectorFonts = true;
        private bool allowVerticalFonts = true;
        private bool allowScriptChange = true;
        private bool fixedPitchOnly = false;
        private int maxSize = 0;
        private int minSize = 0;
        private bool scriptsOnly = false;
        private bool showApply = false;
        private bool showColor = false;
        private bool showEffects = true;
        private bool showHelp = false;

        private bool fontMustExist = false;

        private Panel examplePanel;

        private Button okButton;
        private Button cancelButton;

        private TextBox fontTextBox;
        private TextBox fontstyleTextBox;
        private TextBox fontsizeTextBox;

        private ListBox fontListBox;
        private ListBox fontstyleListBox;
        private ListBox fontsizeListBox;

        private GroupBox effectsGroupBox;
        private CheckBox strikethroughCheckBox;
        private CheckBox underlinedCheckBox;

        private Label fontLabel;
        private Label fontstyleLabel;
        private Label sizeLabel;

        private GroupBox exampleGroupBox;

        private string currentFontName;

        private float currentSize;

        private FontFamily currentFamily;

        private System.Drawing.FontStyle currentFontStyle;

        private bool underlined = false;
        private bool strikethrough = false;

        private Hashtable fontHash = new Hashtable();

        private int[] a_sizes = {
            6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72
        };

        private string example_panel_text;

        private bool internal_change = false;

        #region Public Constructors
        public FontDialog()
        {
            form = new DialogForm(this);
            example_panel_text = "AaBbYyZz";

            okButton = new Button();
            cancelButton = new Button();

            fontTextBox = new TextBox();
            fontstyleTextBox = new TextBox();
            fontsizeTextBox = new TextBox();

            fontListBox = new ListBox();
            fontsizeListBox = new ListBox();
            fontstyleListBox = new ListBox();

            fontLabel = new Label();
            fontstyleLabel = new Label();
            sizeLabel = new Label();

            exampleGroupBox = new GroupBox();

            effectsGroupBox = new GroupBox();
            underlinedCheckBox = new CheckBox();
            strikethroughCheckBox = new CheckBox();

            examplePanel = new Panel();

            exampleGroupBox.SuspendLayout();
            effectsGroupBox.SuspendLayout();
            form.SuspendLayout();

            form.FormBorderStyle = FormBorderStyle.FixedDialog;
            form.MaximizeBox = false;

            // fontsizeListBox
            fontsizeListBox.Location = new System.Drawing.Point(284, 47);
            fontsizeListBox.Size = new System.Drawing.Size(52, 95);
            fontsizeListBox.TabIndex = 10;
            fontListBox.Sorted = true;
            // fontTextBox
            fontTextBox.Location = new System.Drawing.Point(16, 26);
            fontTextBox.Size = new System.Drawing.Size(140, 21);
            fontTextBox.TabIndex = 5;
            fontTextBox.Text = "";
            // fontstyleLabel
            fontstyleLabel.Location = new System.Drawing.Point(164, 10);
            fontstyleLabel.Size = new System.Drawing.Size(100, 16);
            fontstyleLabel.TabIndex = 1;
            fontstyleLabel.Text = "Font Style:";
            // typesizeTextBox
            fontsizeTextBox.Location = new System.Drawing.Point(284, 26);
            fontsizeTextBox.Size = new System.Drawing.Size(52, 21);
            fontsizeTextBox.TabIndex = 7;
            fontsizeTextBox.Text = "";
            fontsizeTextBox.MaxLength = 2;
            // fontListBox
            fontListBox.Location = new System.Drawing.Point(16, 47);
            fontListBox.Size = new System.Drawing.Size(140, 95);
            fontListBox.TabIndex = 8;
            fontListBox.Sorted = true;
            // exampleGroupBox
            exampleGroupBox.Controls.Add(examplePanel);
            exampleGroupBox.Location = new System.Drawing.Point(164, 158);
            exampleGroupBox.Size = new System.Drawing.Size(172, 70);
            exampleGroupBox.TabIndex = 12;
            exampleGroupBox.TabStop = false;
            exampleGroupBox.Text = "Example";
            // fontstyleListBox
            fontstyleListBox.Location = new System.Drawing.Point(164, 47);
            fontstyleListBox.Size = new System.Drawing.Size(112, 95);
            fontstyleListBox.TabIndex = 9;
            // schriftartLabel
            fontLabel.Location = new System.Drawing.Point(16, 10);
            fontLabel.Size = new System.Drawing.Size(88, 16);
            fontLabel.TabIndex = 0;
            fontLabel.Text = "Font:";
            // effectsGroupBox
            effectsGroupBox.Controls.Add(underlinedCheckBox);
            effectsGroupBox.Controls.Add(strikethroughCheckBox);
            effectsGroupBox.Location = new System.Drawing.Point(16, 158);
            effectsGroupBox.Size = new System.Drawing.Size(140, 70);
            effectsGroupBox.TabIndex = 11;
            effectsGroupBox.TabStop = false;
            effectsGroupBox.Text = "Effects";
            // strikethroughCheckBox
            strikethroughCheckBox.Location = new System.Drawing.Point(12, 20);
            strikethroughCheckBox.TabIndex = 0;
            strikethroughCheckBox.Text = "Strikethrough";
            // underlinedCheckBox
            underlinedCheckBox.Location = new System.Drawing.Point(12, 43);
            underlinedCheckBox.TabIndex = 1;
            underlinedCheckBox.Text = "Underlined";
            // sizeLabel
            sizeLabel.Location = new System.Drawing.Point(284, 10);
            sizeLabel.Size = new System.Drawing.Size(100, 16);
            sizeLabel.TabIndex = 2;
            sizeLabel.Text = "Size:";
            // okButton
            okButton.Location = new System.Drawing.Point(352, 26);
            okButton.Size = new System.Drawing.Size(70, 23);
            okButton.TabIndex = 3;
            okButton.Text = "OK";
            // cancelButton
            cancelButton.Location = new System.Drawing.Point(352, 52);
            cancelButton.Size = new System.Drawing.Size(70, 23);
            cancelButton.TabIndex = 4;
            cancelButton.Text = "Cancel";
            // fontstyleTextBox
            fontstyleTextBox.Location = new System.Drawing.Point(164, 26);
            fontstyleTextBox.Size = new System.Drawing.Size(112, 21);
            fontstyleTextBox.TabIndex = 6;
            fontstyleTextBox.Text = "";
            // examplePanel
            examplePanel.Location = new System.Drawing.Point(8, 20);
            examplePanel.TabIndex = 0;
            examplePanel.Size = new System.Drawing.Size(156, 40);

            form.AcceptButton = okButton;
            form.CancelButton = cancelButton;

            form.Controls.Add(exampleGroupBox);
            form.Controls.Add(effectsGroupBox);
            form.Controls.Add(fontsizeListBox);
            form.Controls.Add(fontstyleListBox);
            form.Controls.Add(fontListBox);
            form.Controls.Add(fontsizeTextBox);
            form.Controls.Add(fontstyleTextBox);
            form.Controls.Add(fontTextBox);
            form.Controls.Add(cancelButton);
            form.Controls.Add(okButton);
            form.Controls.Add(sizeLabel);
            form.Controls.Add(fontstyleLabel);
            form.Controls.Add(fontLabel);

            exampleGroupBox.ResumeLayout(false);
            effectsGroupBox.ResumeLayout(false);

            form.ClientSize = new System.Drawing.Size(434, 244);
            form.Text = "Font";

            form.ResumeLayout(false);


            cancelButton.Click += new EventHandler(OnClickCancelButton);
            okButton.Click += new EventHandler(OnClickOkButton);
            examplePanel.Paint += new PaintEventHandler(OnPaintExamplePanel);
            fontListBox.SelectedIndexChanged += new EventHandler(OnSelectedIndexChangedFontListBox);
            fontsizeListBox.SelectedIndexChanged += new EventHandler(OnSelectedIndexChangedSizeListBox);
            fontstyleListBox.SelectedIndexChanged += new EventHandler(OnSelectedIndexChangedFontStyleListBox);
            underlinedCheckBox.CheckedChanged += new EventHandler(OnCheckedChangedUnderlinedCheckBox);
            strikethroughCheckBox.CheckedChanged += new EventHandler(OnCheckedChangedStrikethroughCheckBox);

            fontTextBox.KeyPress += new KeyPressEventHandler(OnFontTextBoxKeyPress);
            fontstyleTextBox.KeyPress += new KeyPressEventHandler(OnFontStyleTextBoxKeyPress);
            fontsizeTextBox.KeyPress += new KeyPressEventHandler(OnFontSizeTextBoxKeyPress);

            fontTextBox.TextChanged += new EventHandler(OnFontTextBoxTextChanged);
            fontstyleTextBox.TextChanged += new EventHandler(OnFontStyleTextTextChanged);
            fontsizeTextBox.TextChanged += new EventHandler(OnFontSizeTextBoxTextChanged);

            PopulateFontList();
        }
        #endregion // Public Constructors                        

        #region Public Instance Properties
        public Font Font
        {
            get
            {
                return font;
            }

            set
            {
                if (value != null)
                {
                    font = new Font(value, value.Style);

                    currentFontStyle = font.Style;
                    currentSize = font.SizeInPoints;
                    currentFontName = font.Name;

                    strikethroughCheckBox.Checked = font.Strikeout;
                    underlinedCheckBox.Checked = font.Underline;

                    int index = fontListBox.FindString(currentFontName);

                    if (index != -1)
                    {
                        fontListBox.SelectedIndex = index;
                    }
                    else
                    {
                        fontListBox.SelectedIndex = 0;
                    }

                    UpdateFontSizeListBox();
                    UpdateFontStyleListBox();

                    fontListBox.TopIndex = fontListBox.SelectedIndex;
                }
            }
        }

        [DefaultValue(false)]
        public bool FontMustExist
        {
            get
            {
                return fontMustExist;
            }

            set
            {
                fontMustExist = value;
            }
        }

        [DefaultValue("Color [Black]")]
        public Color Color
        {
            set
            {
                color = value;
                examplePanel.Invalidate();
            }

            get
            {
                return color;
            }
        }

        [DefaultValue(true)]
        public bool AllowSimulations
        {
            set
            {
                allowSimulations = value;
            }

            get
            {
                return allowSimulations;
            }
        }

        [DefaultValue(true)]
        public bool AllowVectorFonts
        {
            set
            {
                allowVectorFonts = value;
            }

            get
            {
                return allowVectorFonts;
            }
        }

        [DefaultValue(true)]
        public bool AllowVerticalFonts
        {
            set
            {
                allowVerticalFonts = value;
            }

            get
            {
                return allowVerticalFonts;
            }
        }

        [DefaultValue(true)]
        public bool AllowScriptChange
        {
            set
            {
                allowScriptChange = value;
            }

            get
            {
                return allowScriptChange;
            }
        }

        [DefaultValue(false)]
        public bool FixedPitchOnly
        {
            set
            {
                if (fixedPitchOnly != value)
                {
                    fixedPitchOnly = value;
                    PopulateFontList();
                }
            }

            get
            {
                return fixedPitchOnly;
            }
        }

        [DefaultValue(0)]
        public int MaxSize
        {
            set
            {
                maxSize = value;

                if (maxSize < 0)
                    maxSize = 0;

                if (maxSize < minSize)
                    minSize = maxSize;

                CreateFontSizeListBoxItems();
            }

            get
            {
                return maxSize;
            }
        }

        [DefaultValue(0)]
        public int MinSize
        {
            set
            {
                minSize = value;

                if (minSize < 0)
                    minSize = 0;

                if (minSize > maxSize)
                    maxSize = minSize;

                CreateFontSizeListBoxItems();

                if (minSize > currentSize)
                    if (font != null)
                    {
                        font.Dispose();

                        currentSize = minSize;

                        font = new Font(currentFamily, currentSize, currentFontStyle);

                        UpdateExamplePanel();

                        fontsizeTextBox.Text = currentSize.ToString();
                    }
            }

            get
            {
                return minSize;
            }
        }

        [DefaultValue(false)]
        public bool ScriptsOnly
        {
            set
            {
                scriptsOnly = value;
            }

            get
            {
                return scriptsOnly;
            }
        }

        [DefaultValue(false)]
        public bool ShowApply
        {
            set
            {
                if (value != showApply)
                {
                    showApply = value;
                }

            }

            get
            {
                return showApply;
            }
        }

        [DefaultValue(false)]
        public bool ShowColor
        {
            set
            {
                if (value != showColor)
                {
                    showColor = value;
                }
            }

            get
            {
                return showColor;
            }
        }

        [DefaultValue(true)]
        public bool ShowEffects
        {
            set
            {
                if (value != showEffects)
                {
                    showEffects = value;
                    if (showEffects)
                        effectsGroupBox.Show();
                    else
                        effectsGroupBox.Hide();

                    form.Refresh();
                }
            }

            get
            {
                return showEffects;
            }
        }

        [DefaultValue(false)]
        public bool ShowHelp
        {
            set
            {
                if (value != showHelp)
                {
                    showHelp = value;
                }
            }

            get
            {
                return showHelp;
            }
        }

        #endregion // Public Instance Properties                               

        #region Protected Instance Properties
        protected int Options
        {
            get { return 0; }
        }
        #endregion // Protected Instance Properties                                  

        #region Public Instance Methods
        public override void Reset()
        {
            color = Color.Black;
            allowSimulations = true;
            allowVectorFonts = true;
            allowVerticalFonts = true;
            allowScriptChange = true;
            fixedPitchOnly = false;

            maxSize = 0;
            minSize = 0;
            CreateFontSizeListBoxItems();

            scriptsOnly = false;

            showApply = false;

            showColor = false;

            showEffects = true;
            effectsGroupBox.Show();

            showHelp = false;

            form.Refresh();
        }

        public override string ToString()
        {
            if (font == null)
                return base.ToString();
            return String.Concat(base.ToString(), ", Font: ", font.ToString());
        }
        #endregion // Public Instance Methods                            

        #region Protected Instance Methods
        protected override bool RunDialog()
        {
            return true;
        }

        #endregion // Protected Instance Methods                               

        void OnClickCancelButton(object sender, EventArgs e)
        {
            form.DialogResult = DialogResult.Cancel;
        }

        void OnClickOkButton(object sender, EventArgs e)
        {
            form.DialogResult = DialogResult.OK;
        }

        void OnPaintExamplePanel(object sender, PaintEventArgs e)
        {
            e.Graphics.FillRectangle(SystemBrushes.Control, 0, 0, 156, 40);

            SizeF fontSizeF = e.Graphics.MeasureString(example_panel_text, font);

            int text_width = (int)fontSizeF.Width;
            int text_height = (int)fontSizeF.Height;

            int x = (examplePanel.Width / 2) - (text_width / 2);
            if (x < 0) x = 0;

            int y = (examplePanel.Height / 2) - (text_height / 2);

            e.Graphics.DrawString(example_panel_text, font, SystemBrushes.ControlText, new System.Drawing.Point(x, y));
        }

        void OnSelectedIndexChangedFontListBox(object sender, EventArgs e)
        {
            if (fontListBox.SelectedIndex != -1)
            {
                currentFamily = FindByName(fontListBox.Items[fontListBox.SelectedIndex].ToString());

                fontTextBox.Text = currentFamily.Name;

                internal_change = true;

                UpdateFontStyleListBox();

                UpdateFontSizeListBox();

                UpdateExamplePanel();

                fontTextBox.Focus();

                internal_change = false;
            }
        }

        void OnSelectedIndexChangedSizeListBox(object sender, EventArgs e)
        {
            if (fontsizeListBox.SelectedIndex != -1)
            {
                currentSize = (float)System.Convert.ToDouble(fontsizeListBox.Items[fontsizeListBox.SelectedIndex]);

            }
            
            fontsizeTextBox.Text = currentSize.ToString();

            UpdateExamplePanel();

            if (!internal_change)
                fontsizeTextBox.Focus();
        }

        void OnSelectedIndexChangedFontStyleListBox(object sender, EventArgs e)
        {
            if (fontstyleListBox.SelectedIndex != -1)
            {
                switch (fontstyleListBox.SelectedIndex)
                {
                    case 0:
                        currentFontStyle = System.Drawing.FontStyle.Regular;
                        break;
                    case 1:
                        currentFontStyle = System.Drawing.FontStyle.Bold;
                        break;
                    case 2:
                        currentFontStyle = System.Drawing.FontStyle.Italic;
                        break;
                    case 3:
                        currentFontStyle = System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic;
                        break;
                    default:
                        currentFontStyle = System.Drawing.FontStyle.Regular;
                        break;
                }

                if (underlined)
                    currentFontStyle = currentFontStyle | System.Drawing.FontStyle.Underline;

                if (strikethrough)
                    currentFontStyle = currentFontStyle | System.Drawing.FontStyle.Strikeout;

                fontstyleTextBox.Text = fontstyleListBox.Items[fontstyleListBox.SelectedIndex].ToString();

                if (!internal_change)
                {
                    UpdateExamplePanel();

                    fontstyleTextBox.Focus();
                }
            }
        }

        void OnCheckedChangedUnderlinedCheckBox(object sender, EventArgs e)
        {
            if (underlinedCheckBox.Checked)
            {
                currentFontStyle = currentFontStyle | System.Drawing.FontStyle.Underline;
                underlined = true;
            }
            else
            {
                currentFontStyle = currentFontStyle ^ System.Drawing.FontStyle.Underline;
                underlined = false;
            }

            UpdateExamplePanel();
        }

        void OnCheckedChangedStrikethroughCheckBox(object sender, EventArgs e)
        {
            if (strikethroughCheckBox.Checked)
            {
                currentFontStyle = currentFontStyle | System.Drawing.FontStyle.Strikeout;
                strikethrough = true;
            }
            else
            {
                currentFontStyle = currentFontStyle ^ System.Drawing.FontStyle.Strikeout;
                strikethrough = false;
            }

            UpdateExamplePanel();
        }

        bool internal_textbox_change = false;

        void OnFontTextBoxKeyPress(object sender, KeyPressEventArgs e)
        {
            internal_textbox_change = true;

            if (fontListBox.SelectedIndex > -1)
                fontListBox.SelectedIndex = -1;
        }

        void OnFontStyleTextBoxKeyPress(object sender, KeyPressEventArgs e)
        {
            internal_textbox_change = true;

            if (fontstyleListBox.SelectedIndex > -1)
                fontstyleListBox.SelectedIndex = -1;
        }

        void OnFontSizeTextBoxKeyPress(object sender, KeyPressEventArgs e)
        {
            if (Char.IsLetter(e.KeyChar) || Char.IsWhiteSpace(e.KeyChar) || Char.IsPunctuation(e.KeyChar) || e.KeyChar == ',')
            {
                e.Handled = true;
                return;
            }

            internal_textbox_change = true;
        }

        void OnFontTextBoxTextChanged(object sender, EventArgs e)
        {
            if (!internal_textbox_change)
                return;

            internal_textbox_change = false;

            string search = fontTextBox.Text;

            // Look for an exact match
            int found = fontListBox.FindStringExact(search);

            if (found != -1)
            {
                fontListBox.SelectedIndex = found;
                return;
            }

            // Look for a partial match
            found = fontListBox.FindString(search);

            if (found != -1)
            {
                fontListBox.TopIndex = found;
                return;
            }

            // No match, scroll to the top
            if (fontListBox.Items.Count > 0)
                fontListBox.TopIndex = 0;
        }

        void OnFontStyleTextTextChanged(object sender, EventArgs e)
        {
            if (!internal_textbox_change)
                return;

            internal_textbox_change = false;

            // Look for an exact match
            int found = fontstyleListBox.FindStringExact(fontstyleTextBox.Text);

            if (found != -1)
                fontstyleListBox.SelectedIndex = found;
        }

        void OnFontSizeTextBoxTextChanged(object sender, EventArgs e)
        {
            if (!internal_textbox_change)
                return;

            internal_textbox_change = false;

            if (fontsizeTextBox.Text.Length == 0)
                return;

            for (int i = 0; i < fontsizeListBox.Items.Count; i++)
            {
                string name = fontsizeListBox.Items[i] as string;

                if (name.StartsWith(fontsizeTextBox.Text))
                {
                    if (name == fontsizeTextBox.Text)
                        fontsizeListBox.SelectedIndex = i;
                    else
                        fontsizeListBox.TopIndex = i;

                    break;
                }
            }
            
            currentSize = (float)System.Convert.ToDouble(fontsizeTextBox.Text);
            UpdateExamplePanel();
        }

        void UpdateExamplePanel()
        {
            if (font != null)
                font.Dispose();

            font = new Font(currentFamily, currentSize, currentFontStyle);

            examplePanel.Invalidate();
        }

        void UpdateFontSizeListBox()
        {
            int index = fontsizeListBox.FindString(((int)Math.Round((currentSize))).ToString());
            fontsizeListBox.SelectedIndex = index;
        }

        void UpdateFontStyleListBox()
        {
            // don't know if that works, IsStyleAvailable returns true for all styles under X

            fontstyleListBox.BeginUpdate();

            fontstyleListBox.Items.Clear();

            int index = -1;
            int to_select = 0;

            if (currentFamily.IsStyleAvailable(System.Drawing.FontStyle.Regular))
            {
                index = fontstyleListBox.Items.Add("Regular");

                if ((currentFontStyle & System.Drawing.FontStyle.Regular) == System.Drawing.FontStyle.Regular)
                    to_select = index;
            }

            if (currentFamily.IsStyleAvailable(System.Drawing.FontStyle.Bold))
            {
                index = fontstyleListBox.Items.Add("Bold");

                if ((currentFontStyle & System.Drawing.FontStyle.Bold) == System.Drawing.FontStyle.Bold)
                    to_select = index;
            }

            if (currentFamily.IsStyleAvailable(System.Drawing.FontStyle.Italic))
            {
                index = fontstyleListBox.Items.Add("Italic");

                if ((currentFontStyle & System.Drawing.FontStyle.Italic) == System.Drawing.FontStyle.Italic)
                    to_select = index;
            }

            if (currentFamily.IsStyleAvailable(System.Drawing.FontStyle.Bold) && currentFamily.IsStyleAvailable(System.Drawing.FontStyle.Italic))
            {
                index = fontstyleListBox.Items.Add("Bold Italic");

                if ((currentFontStyle & (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic)) == (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic))
                    to_select = index;
            }

            if (fontstyleListBox.Items.Count > 0)
            {
                fontstyleListBox.SelectedIndex = to_select;

                switch ((string)fontstyleListBox.SelectedItem)
                {
                    case "Regular":
                        currentFontStyle = System.Drawing.FontStyle.Regular;
                        break;
                    case "Bold":
                        currentFontStyle = System.Drawing.FontStyle.Bold;
                        break;
                    case "Italic":
                        currentFontStyle = System.Drawing.FontStyle.Italic;
                        break;
                    case "Bold Italic":
                        currentFontStyle = System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic;
                        break;
                }

                if (strikethroughCheckBox.Checked)
                    currentFontStyle |= System.Drawing.FontStyle.Strikeout;
                if (underlinedCheckBox.Checked)
                    currentFontStyle |= System.Drawing.FontStyle.Underline;
            }

            fontstyleListBox.EndUpdate();
        }

        FontFamily FindByName(string name)
        {
            return fontHash[name] as FontFamily;
        }

        void CreateFontSizeListBoxItems()
        {
            fontsizeListBox.BeginUpdate();

            fontsizeListBox.Items.Clear();

            if (minSize == 0 && maxSize == 0)
            {
                foreach (int i in a_sizes)
                    fontsizeListBox.Items.Add(i.ToString());
            }
            else
            {
                foreach (int i in a_sizes)
                {
                    if (i >= minSize && i <= maxSize)
                        fontsizeListBox.Items.Add(i.ToString());
                }
            }

            fontsizeListBox.EndUpdate();
        }

        #region Private Methods
        private void PopulateFontList()
        {
            fontListBox.Items.Clear();
            fontHash.Clear();

            fontListBox.BeginUpdate();

            foreach (FontFamily ff in FontFamily.Families)
            {
                if (!fontHash.ContainsKey(ff.Name))
                {
                    if (!fixedPitchOnly || (IsFontFamilyFixedPitch(ff)))
                    {
                        fontListBox.Items.Add(ff.Name);
                        fontHash.Add(ff.Name, ff);
                    }
                }
            }

            fontListBox.EndUpdate();
            CreateFontSizeListBoxItems();

            if (fixedPitchOnly)
                this.Font = new Font(FontFamily.GenericMonospace, 8.25f);
            else
                this.Font = form.Font;
        }

        private bool IsFontFamilyFixedPitch(FontFamily family)
        {
            System.Drawing.FontStyle fs;

            if (family.IsStyleAvailable(System.Drawing.FontStyle.Regular))
                fs = System.Drawing.FontStyle.Regular;
            else if (family.IsStyleAvailable(System.Drawing.FontStyle.Bold))
                fs = System.Drawing.FontStyle.Bold;
            else if (family.IsStyleAvailable(System.Drawing.FontStyle.Italic))
                fs = System.Drawing.FontStyle.Italic;
            else if (family.IsStyleAvailable(System.Drawing.FontStyle.Strikeout))
                fs = System.Drawing.FontStyle.Strikeout;
            else if (family.IsStyleAvailable(System.Drawing.FontStyle.Underline))
                fs = System.Drawing.FontStyle.Underline;
            else
                return false;

            Font f = new Font(family.Name, 10, fs);

            if (TextRenderer.MeasureText("i", f).Width == TextRenderer.MeasureText("w", f).Width)
                return true;

            return false;
        }

        #endregion
    }
}