/// <summary>
 /// Combined Event Handler for Formatting a PARAGRAPH except Indentation (DONE in Rich Text Viewer Form) when pressed from the TOP MENU.
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void setParagraphFormat_ToolStripMenuItem_Click(object sender, EventArgs e)
 {
     if (this.ActiveMdiChild != null)
     {
         Text_Viewer      text_View   = (Text_Viewer)this.ActiveMdiChild;
         Paragraph_Format para_Format = new Paragraph_Format((Text_Viewer)this.ActiveMdiChild);
         para_Format.set_Dialog_State(text_View.selected_Alignment, text_View.selected_Bullets);
         para_Format.ShowDialog();
         if (para_Format.DialogResult == DialogResult.OK)
         {
             text_View.format_Paragraph(para_Format.curr_Para_Aligment, para_Format.is_Bullets_Applied);
         }
     }
 }
        /// <summary>
        /// Combined event handler for handling all the buttons on tool strip.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void format_Text_Click(object sender, EventArgs e)
        {
            try
            {
                ToolStripButton pressed_Btn = (ToolStripButton)sender;
                //For BOLD, ITALIC, UNDERLINE, STRIKE THROUGH.
                if (pressed_Btn == tsb_Bold || pressed_Btn == tsb_Italic || pressed_Btn == tsb_UnderLine || pressed_Btn == tsb_StrikeThrough)
                {
                    if (this.ActiveMdiChild != null)
                    {
                        Text_Viewer textView  = (Text_Viewer)this.ActiveMdiChild;
                        Font        temp_Font = textView.selected_Font_Settings;
                        if (pressed_Btn == tsb_Bold)
                        {
                            if (temp_Font.Bold)
                            {
                                FontStyle style = FontStyle.Regular;
                                if (temp_Font.Italic)
                                {
                                    style = style | FontStyle.Italic;
                                }
                                if (temp_Font.Underline)
                                {
                                    style = style | FontStyle.Underline;
                                }
                                if (temp_Font.Strikeout)
                                {
                                    style = style | FontStyle.Strikeout;
                                }



                                textView.format_Font(new Font(temp_Font.FontFamily, temp_Font.Size, style), textView.selected_BackColor, textView.selected_ForeColor);
                            }
                            else
                            {
                                textView.format_Font(new Font(temp_Font.FontFamily, temp_Font.Size, temp_Font.Style | FontStyle.Bold), textView.selected_BackColor, textView.selected_ForeColor);
                            }
                        }

                        if (pressed_Btn == tsb_Italic)
                        {
                            if (temp_Font.Italic)
                            {
                                FontStyle style = FontStyle.Regular;
                                if (temp_Font.Bold)
                                {
                                    style = style | FontStyle.Bold;
                                }
                                if (temp_Font.Underline)
                                {
                                    style = style | FontStyle.Underline;
                                }
                                if (temp_Font.Strikeout)
                                {
                                    style = style | FontStyle.Strikeout;
                                }


                                textView.format_Font(new Font(temp_Font.FontFamily, temp_Font.Size, style), textView.selected_BackColor, textView.selected_ForeColor);
                            }
                            else
                            {
                                textView.format_Font(new Font(temp_Font.FontFamily, temp_Font.Size, temp_Font.Style | FontStyle.Italic), textView.selected_BackColor, textView.selected_ForeColor);
                            }
                        }

                        if (pressed_Btn == tsb_UnderLine)
                        {
                            if (temp_Font.Underline)
                            {
                                FontStyle style = FontStyle.Regular;
                                if (temp_Font.Bold)
                                {
                                    style = style | FontStyle.Bold;
                                }
                                if (temp_Font.Italic)
                                {
                                    style = style | FontStyle.Italic;
                                }
                                if (temp_Font.Strikeout)
                                {
                                    style = style | FontStyle.Strikeout;
                                }



                                textView.format_Font(new Font(temp_Font.FontFamily, temp_Font.Size, style), textView.selected_BackColor, textView.selected_ForeColor);
                            }
                            else
                            {
                                textView.format_Font(new Font(temp_Font.FontFamily, temp_Font.Size, temp_Font.Style | FontStyle.Underline), textView.selected_BackColor, textView.selected_ForeColor);
                            }
                        }

                        if (pressed_Btn == tsb_StrikeThrough)
                        {
                            if (temp_Font.Strikeout)
                            {
                                FontStyle style = FontStyle.Regular;
                                if (temp_Font.Bold)
                                {
                                    style = style | FontStyle.Bold;
                                }
                                if (temp_Font.Underline)
                                {
                                    style = style | FontStyle.Underline;
                                }
                                if (temp_Font.Italic)
                                {
                                    style = style | FontStyle.Italic;
                                }



                                textView.format_Font(new Font(temp_Font.FontFamily, temp_Font.Size, style), textView.selected_BackColor, textView.selected_ForeColor);
                            }
                            else
                            {
                                textView.format_Font(new Font(temp_Font.FontFamily, temp_Font.Size, temp_Font.Style | FontStyle.Strikeout), textView.selected_BackColor, textView.selected_ForeColor);
                            }
                        }
                    }
                }
                else if (pressed_Btn == tsb_AlignLeft || pressed_Btn == tsb_AlignCenter || pressed_Btn == tsb_AlignRight)
                {//For ALIGN LEFT, ALIGN CENTER, ALIGN RIGHT.
                    if (this.ActiveMdiChild != null)
                    {
                        Text_Viewer text_view = (Text_Viewer)this.ActiveMdiChild;
                        text_view.format_Paragraph(pressed_Btn.Text, text_view.selected_Bullets);
                    }
                }
                else if (pressed_Btn == tsb_IncreaseIndent || pressed_Btn == tsb_DecreaseIndent)
                {//For INCREASE DECREASE INDENT.
                    if (this.ActiveMdiChild != null)
                    {
                        Text_Viewer text_view = (Text_Viewer)this.ActiveMdiChild;
                        if (pressed_Btn == tsb_IncreaseIndent)
                        {
                            text_view.increase_decrease_Indent(true);
                        }
                        else
                        {
                            text_view.increase_decrease_Indent(false);
                        }
                    }
                }
                else if (pressed_Btn == tsb_Bullet)
                {//For ENABLING/DISABLING BULLETS.
                    if (this.ActiveMdiChild != null)
                    {
                        Text_Viewer text_view = (Text_Viewer)this.ActiveMdiChild;
                        if (text_view.selected_Bullets)
                        {
                            text_view.format_Paragraph(text_view.selected_Alignment.ToString(), false);
                        }
                        else
                        {
                            text_view.format_Paragraph(text_view.selected_Alignment.ToString(), true);
                        }
                    }
                }
            }
            catch (Exception)
            {
                MessageBox.Show("Error: Cannot Handle Multiple Fonts and Size");
            }
        }