ShareX/ScreenCaptureLib/Forms/TriangleRegion.cs

#region License Information (GPL v3)

/*
    ShareX - A program that allows you to take screenshots and share any file type
    Copyright (C) 2008-2014 ShareX Developers

    This program 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 2
    of the License, or (at your option) any later version.

    This program 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.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

    Optionally you can also view the license at <http://www.gnu.org/licenses/>.
*/

#endregion License Information (GPL v3)

using HelpersLib;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace ScreenCaptureLib
{
    public class TriangleRegion : RectangleRegion
    {
        public TriangleAngle Angle { get; set; }

        public TriangleRegion(Image backgroundImage = null)
            : base(backgroundImage)
        {
            Angle = TriangleAngle.Top;

            KeyDown += TriangleRegion_KeyDown;
        }

        private void TriangleRegion_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyData == Keys.Add)
            {
                if (Angle == TriangleAngle.Left)
                {
                    Angle = TriangleAngle.Top;
                }
                else
                {
                    Angle++;
                }
            }
            else if (e.KeyData == Keys.Subtract)
            {
                if (Angle == TriangleAngle.Top)
                {
                    Angle = TriangleAngle.Left;
                }
                else
                {
                    Angle--;
                }
            }
        }

        protected override void AddShapePath(GraphicsPath graphicsPath, Rectangle rect)
        {
            graphicsPath.AddTriangle(rect, Angle);
        }
    }
}