/* * Greenshot - a free and open source screenshot tool * Copyright (C) 2007-2010 Thomas Braun, Jens Klingen, Robin Krom * * For more information see: http://getgreenshot.org/ * The Greenshot project is hosted on Sourceforge: http://sourceforge.net/projects/greenshot/ * * 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 1 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, see . */ using System; using System.Drawing; using System.Runtime.Serialization; using System.Windows.Forms; using Greenshot.Configuration; using Greenshot.Drawing.Fields; using Greenshot.Helpers; namespace Greenshot.Drawing { /// /// Description of EllipseContainer. /// [Serializable()] public class EllipseContainer : DrawableContainer { public EllipseContainer(Surface parent) : base(parent) { AddField(FieldFactory.CreateField(FieldType.LINE_THICKNESS)); AddField(FieldFactory.CreateField(FieldType.LINE_COLOR)); AddField(FieldFactory.CreateField(FieldType.FILL_COLOR)); AddField(FieldFactory.CreateField(FieldType.SHADOW)); } public override void Draw(Graphics graphics, RenderMode renderMode) { graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS); Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR); Color fillColor = GetFieldValueAsColor(FieldType.FILL_COLOR); bool shadow = GetFieldValueAsBool(FieldType.SHADOW); bool lineVisible = (lineThickness > 0 && Colors.IsVisible(lineColor)); // draw shadow before anything else if (shadow && (lineVisible || Colors.IsVisible(fillColor))) { int basealpha = 100; int alpha = basealpha; int steps = 5; int currentStep = lineVisible ? 1 : 0; while (currentStep <= steps) { using (Pen shadowPen = new Pen(Color.FromArgb(alpha, 100, 100, 100))) { shadowPen.Width = lineVisible ? lineThickness : 1; Rectangle shadowRect = GuiRectangle.GetGuiRectangle(Left + currentStep, Top + currentStep, Width, Height); graphics.DrawEllipse(shadowPen, shadowRect); currentStep++; alpha = alpha - basealpha / steps; } } } //draw the original shape Rectangle rect = GuiRectangle.GetGuiRectangle(this.Left, this.Top, this.Width, this.Height); using (Brush brush = new SolidBrush(fillColor)) { graphics.FillEllipse(brush, rect); } using (Pen pen = new Pen(lineColor)) { pen.Width = lineThickness; if (pen.Width > 0) { graphics.DrawEllipse(pen, rect); } } } public override bool Contains(int x, int y) { double xDistanceFromCenter = x - (Left+Width/2); double yDistanceFromCenter = y - (Top+Height/2); // ellipse: x^2/a^2 + y^2/b^2 = 1 return Math.Pow(xDistanceFromCenter,2)/Math.Pow(Width/2,2) + Math.Pow(yDistanceFromCenter,2)/Math.Pow(Height/2,2) < 1; } } }