mirror of
https://github.com/greenshot/greenshot.git
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254 lines
9.0 KiB
C#
254 lines
9.0 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2016 Thomas Braun, Jens Klingen, Robin Krom
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*
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* For more information see: http://getgreenshot.org/
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* The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using Greenshot.Drawing.Fields;
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using Greenshot.Helpers;
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using Greenshot.Plugin.Drawing;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Runtime.Serialization;
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namespace Greenshot.Drawing {
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/// <summary>
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/// Description of PathContainer.
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/// </summary>
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[Serializable]
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public class FreehandContainer : DrawableContainer {
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private static readonly float [] PointOffset = {0.5f, 0.25f, 0.75f};
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[NonSerialized]
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private GraphicsPath freehandPath = new GraphicsPath();
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private Rectangle myBounds = Rectangle.Empty;
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private Point lastMouse = Point.Empty;
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private readonly List<Point> capturePoints = new List<Point>();
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private bool isRecalculated;
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/// <summary>
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/// Constructor
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/// </summary>
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public FreehandContainer(Surface parent) : base(parent) {
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Width = parent.Width;
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Height = parent.Height;
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Top = 0;
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Left = 0;
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}
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protected override void InitializeFields() {
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AddField(GetType(), FieldType.LINE_THICKNESS, 3);
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AddField(GetType(), FieldType.LINE_COLOR, Color.Red);
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}
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public override void Transform(Matrix matrix) {
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Point[] points = capturePoints.ToArray();
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matrix.TransformPoints(points);
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capturePoints.Clear();
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capturePoints.AddRange(points);
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RecalculatePath();
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}
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protected override void OnDeserialized(StreamingContext context) {
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RecalculatePath();
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}
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/// <summary>
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/// This Dispose is called from the Dispose and the Destructor.
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/// </summary>
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/// <param name="disposing">When disposing==true all non-managed resources should be freed too!</param>
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protected override void Dispose(bool disposing) {
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base.Dispose(disposing);
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if (disposing)
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{
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freehandPath?.Dispose();
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}
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freehandPath = null;
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}
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/// <summary>
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/// Called from Surface (the parent) when the drawing begins (mouse-down)
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/// </summary>
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/// <returns>true if the surface doesn't need to handle the event</returns>
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public override bool HandleMouseDown(int mouseX, int mouseY) {
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lastMouse = new Point(mouseX, mouseY);
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capturePoints.Add(lastMouse);
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return true;
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}
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/// <summary>
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/// Called from Surface (the parent) if a mouse move is made while drawing
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/// </summary>
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/// <returns>true if the surface doesn't need to handle the event</returns>
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public override bool HandleMouseMove(int mouseX, int mouseY) {
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Point previousPoint = capturePoints[capturePoints.Count-1];
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if (GeometryHelper.Distance2D(previousPoint.X, previousPoint.Y, mouseX, mouseY) >= 2*EditorConfig.FreehandSensitivity) {
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capturePoints.Add(new Point(mouseX, mouseY));
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}
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if (GeometryHelper.Distance2D(lastMouse.X, lastMouse.Y, mouseX, mouseY) >= EditorConfig.FreehandSensitivity) {
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//path.AddCurve(new Point[]{lastMouse, new Point(mouseX, mouseY)});
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freehandPath.AddLine(lastMouse, new Point(mouseX, mouseY));
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lastMouse = new Point(mouseX, mouseY);
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// Only re-calculate the bounds & redraw when we added something to the path
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myBounds = Rectangle.Round(freehandPath.GetBounds());
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Invalidate();
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}
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return true;
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}
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/// <summary>
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/// Called when the surface finishes drawing the element
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/// </summary>
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public override void HandleMouseUp(int mouseX, int mouseY) {
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// Make sure we don't loose the ending point
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if (GeometryHelper.Distance2D(lastMouse.X, lastMouse.Y, mouseX, mouseY) >= EditorConfig.FreehandSensitivity) {
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capturePoints.Add(new Point(mouseX, mouseY));
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}
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RecalculatePath();
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}
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/// <summary>
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/// Here we recalculate the freehand path by smoothing out the lines with Beziers.
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/// </summary>
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private void RecalculatePath() {
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isRecalculated = true;
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// Dispose the previous path, if we have one
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freehandPath?.Dispose();
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freehandPath = new GraphicsPath();
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// Here we can put some cleanup... like losing all the uninteresting points.
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if (capturePoints.Count >= 3) {
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int index = 0;
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while ((capturePoints.Count - 1) % 3 != 0) {
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// duplicate points, first at 50% than 25% than 75%
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capturePoints.Insert((int)(capturePoints.Count*PointOffset[index]), capturePoints[(int)(capturePoints.Count*PointOffset[index++])]);
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}
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freehandPath.AddBeziers(capturePoints.ToArray());
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} else if (capturePoints.Count == 2) {
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freehandPath.AddLine(capturePoints[0], capturePoints[1]);
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}
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// Recalculate the bounds
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myBounds = Rectangle.Round(freehandPath.GetBounds());
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}
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/// <summary>
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/// Do the drawing of the freehand "stroke"
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/// </summary>
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/// <param name="graphics"></param>
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/// <param name="renderMode"></param>
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public override void Draw(Graphics graphics, RenderMode renderMode) {
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graphics.SmoothingMode = SmoothingMode.HighQuality;
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graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
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graphics.CompositingQuality = CompositingQuality.HighQuality;
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graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
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int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
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Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
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using (Pen pen = new Pen(lineColor)) {
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pen.Width = lineThickness;
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if (pen.Width > 0) {
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// Make sure the lines are nicely rounded
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pen.EndCap = LineCap.Round;
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pen.StartCap = LineCap.Round;
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pen.LineJoin = LineJoin.Round;
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// Move to where we need to draw
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graphics.TranslateTransform(Left,Top);
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if (isRecalculated && Selected && renderMode == RenderMode.EDIT) {
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DrawSelectionBorder(graphics, pen);
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}
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graphics.DrawPath(pen, freehandPath);
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// Move back, otherwise everything is shifted
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graphics.TranslateTransform(-Left,-Top);
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}
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}
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}
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/// <summary>
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/// Draw a selectionborder around the freehand path
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/// </summary>
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/// <param name="graphics"></param>
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/// <param name="linePen"></param>
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protected void DrawSelectionBorder(Graphics graphics, Pen linePen) {
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using (Pen selectionPen = (Pen) linePen.Clone()) {
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using (GraphicsPath selectionPath = (GraphicsPath) freehandPath.Clone()) {
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selectionPen.Width += 5;
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selectionPen.Color = Color.FromArgb(120, Color.LightSeaGreen);
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graphics.DrawPath(selectionPen, selectionPath);
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selectionPath.Widen(selectionPen);
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selectionPen.DashPattern = new float[]{2,2};
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selectionPen.Color = Color.LightSeaGreen;
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selectionPen.Width = 1;
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graphics.DrawPath(selectionPen, selectionPath);
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}
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}
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}
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/// <summary>
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/// Get the bounds in which we have something drawn, plus safety margin, these are not the normal bounds...
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/// </summary>
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public override Rectangle DrawingBounds {
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get {
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if (!myBounds.IsEmpty) {
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int lineThickness = Math.Max(10, GetFieldValueAsInt(FieldType.LINE_THICKNESS));
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int safetymargin = 10;
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return new Rectangle(myBounds.Left + Left - (safetymargin+lineThickness), myBounds.Top + Top - (safetymargin+lineThickness), myBounds.Width + 2*(lineThickness+safetymargin), myBounds.Height + 2*(lineThickness+safetymargin));
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}
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return new Rectangle(0, 0, _parent?.Width??0, _parent?.Height?? 0);
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}
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}
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/// <summary>
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/// FreehandContainer are regarded equal if they are of the same type and their paths are equal.
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public override bool Equals(object obj) {
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bool ret = false;
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if(obj != null && GetType() == obj.GetType()) {
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FreehandContainer other = obj as FreehandContainer;
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if(other != null && freehandPath.Equals(other.freehandPath)) {
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ret = true;
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}
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}
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return ret;
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}
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public override int GetHashCode() {
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return freehandPath.GetHashCode();
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}
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public override bool ClickableAt(int x, int y) {
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bool returnValue = base.ClickableAt(x, y);
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if (returnValue) {
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int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
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using (Pen pen = new Pen(Color.White)) {
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pen.Width = lineThickness + 10;
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returnValue = freehandPath.IsOutlineVisible(x-Left,y-Top, pen);
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}
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}
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return returnValue;
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}
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}
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}
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