source: branches/eraser6/Eraser/ToolBar.cs @ 1017

/* 
 * $Id$
 * Copyright 2008 The Eraser Project
 * Original Author: Joel Low <lowjoel@users.sourceforge.net>
 * Modified By:
 * 
 * This file is part of Eraser.
 * 
 * Eraser is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * Eraser is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * A copy of the GNU General Public License can be found at
 * <http://www.gnu.org/licenses/>.
 */

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Collections.ObjectModel;
using Eraser.Util;

namespace Eraser
{
    public partial class ToolBar : System.Windows.Forms.MenuStrip
    {
        public ToolBar()
        {
            //Create the base component
            InitializeComponent();
            Renderer = new EraserToolStripRenderer();
        }

        private class EraserToolStripRenderer : ToolStripRenderer
        {
            protected override void Initialize(ToolStrip toolStrip)
            {
                base.Initialize(toolStrip);
                owner = toolStrip;
            }

            protected override void OnRenderToolStripBackground(ToolStripRenderEventArgs e)
            {
                //Draw the parent background image. This is not portable in that it will render
                //this code unreusable, but for the lack of anything better this will have to suffice!
                e.Graphics.DrawImage(Properties.Resources.BackgroundGradient,
                    new Point(-owner.Left, -owner.Top));
            }

            protected override void OnRenderItemText(ToolStripItemTextRenderEventArgs e)
            {
                Graphics g = e.Graphics;

                //Draw the actual text
                Rectangle tempRect = e.TextRectangle;
                tempRect.Inflate(3, 3);
                tempRect.Offset(3, 3);
                e.TextRectangle = tempRect;
                using (SolidBrush textBrush = new SolidBrush(TextColour))
                    g.DrawString(e.Text, e.TextFont, textBrush, e.TextRectangle);

                //If the text has got a selection, draw an underline
                if (e.Item.Selected)
                {
                    SizeF textSize = g.MeasureString(e.Text, e.TextFont);
                    using (Pen underlinePen = new Pen(TextColour))
                    {
                        Point underlineStart = e.TextRectangle.Location;
                        underlineStart.Offset(0, Point.Truncate(textSize.ToPointF()).Y);
                        Point underlineEnd = underlineStart;
                        underlineEnd.Offset(e.TextRectangle.Width, 0);

                        g.DrawLine(underlinePen, underlineStart, underlineEnd);
                    }
                }
            }

            /// <summary>
            /// The margin between a drop-down arrow and the surrounding items.
            /// </summary>
            private const int ArrowMargin = 0;

            /// <summary>
            /// The colour of the menu bar text.
            /// </summary>
            private readonly Color TextColour = Color.White;

            /// <summary>
            /// The toolstrip using this renderer.
            /// </summary>
            private ToolStrip owner;
        }
    }
}