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Diffstat (limited to 'src/GraphicObjects/Shape.cs')
| -rw-r--r-- | src/GraphicObjects/Shape.cs | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/GraphicObjects/Shape.cs b/src/GraphicObjects/Shape.cs new file mode 100644 index 00000000..a4b3193e --- /dev/null +++ b/src/GraphicObjects/Shape.cs @@ -0,0 +1,164 @@ +// +// Shape.cs +// +// Author: +// jp <> +// +// Copyright (c) 2013-2017 Jean-Philippe Bruyère +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. +using System; +using System.Xml.Serialization; +using System.ComponentModel; +using System.IO; +using System.Text; +using Cairo; + +namespace Crow +{ + public class PathParser : StringReader + { + public PathParser (string str) : base (str) {} + + public double ReadDouble () { + StringBuilder tmp = new StringBuilder(); + + while (Peek () >= 0) { + char c = (char)Read(); + if (c.IsWhiteSpaceOrNewLine()) { + if (tmp.Length == 0) + continue; + else + break; + } else if (c == ',') + break; + tmp.Append (c); + } + return double.Parse (tmp.ToString ()); + } + + } + public class Shape : GraphicObject + { + #region CTOR + protected Shape () : base() {} + public Shape (Interface iface) : base (iface) {} + #endregion + + string path; + double strokeWidth; + + public string Path { + get { return path; } + set { + if (path == value) + return; + path = value; + contentSize = default (Size); + NotifyValueChanged ("Path", path); + RegisterForGraphicUpdate (); + } + } + [XmlAttributeAttribute][DefaultValue(1.0)] + public double StokeWidth { + get { return strokeWidth; } + set { + if (strokeWidth == value) + return; + strokeWidth = value; + contentSize = default (Size); + NotifyValueChanged ("StrokeWidth", strokeWidth); + RegisterForGraphicUpdate (); + } + } + + protected override void onDraw (Context gr) + { + + if (string.IsNullOrEmpty (path)) + return; + + Rectangle r = ClientRectangle; + + executePath (gr); + + Background.SetAsSource (gr, r); + gr.FillPreserve (); + gr.LineWidth = strokeWidth; + Foreground.SetAsSource (gr, r); + gr.Stroke (); + } + + void executePath (Context gr){ + using (PathParser sr = new PathParser (path)) { + while (sr.Peek () >= 0) { + char c = (char)sr.Read (); + if (c.IsWhiteSpaceOrNewLine ()) + continue; + switch (c) { + case 'M': + gr.MoveTo (sr.ReadDouble (), sr.ReadDouble ()); + break; + case 'm': + gr.RelMoveTo (sr.ReadDouble (), sr.ReadDouble ()); + break; + case 'L': + gr.LineTo (sr.ReadDouble (), sr.ReadDouble ()); + break; + case 'l': + gr.RelLineTo (sr.ReadDouble (), sr.ReadDouble ()); + break; + case 'C': + gr.CurveTo (sr.ReadDouble (), sr.ReadDouble (), sr.ReadDouble (), sr.ReadDouble (), sr.ReadDouble (), sr.ReadDouble ()); + break; + case 'c': + gr.RelCurveTo (sr.ReadDouble (), sr.ReadDouble (), sr.ReadDouble (), sr.ReadDouble (), sr.ReadDouble (), sr.ReadDouble ()); + break; + case 'Z': + gr.ClosePath (); + break; + case 'F': + gr.Fill (); + break; + case 'G': + gr.Stroke (); + break; + default: + throw new Exception ("Invalid character in path string of Shape control"); + } + } + } + } + protected override int measureRawSize (LayoutingType lt) + { + if ((lt == LayoutingType.Width && contentSize.Width == 0) || (lt == LayoutingType.Height && contentSize.Height == 0)) { + using (Surface drawing = new ImageSurface (Format.A1, 1,1)) { + using (Context ctx = new Context (drawing)) { + executePath (ctx); + Rectangle r = ctx.StrokeExtents (); + contentSize = new Size (r.Right, r.Bottom); + } + } + } + return lt == LayoutingType.Width ? + contentSize.Width + 2 * Margin: contentSize.Height + 2 * Margin; + } + } +} + |