627 lines
22 KiB
C#
627 lines
22 KiB
C#
//============================================================================
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//ZedGraph Class Library - A Flexible Line Graph/Bar Graph Library in C#
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//Copyright ?2004 John Champion
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//
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//This library is free software; you can redistribute it and/or
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//modify it under the terms of the GNU Lesser General Public
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//License as published by the Free Software Foundation; either
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//version 2.1 of the License, or (at your option) any later version.
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//
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//This library 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 GNU
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//Lesser General Public License for more details.
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//
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//You should have received a copy of the GNU Lesser General Public
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//License along with this library; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//=============================================================================
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using System;
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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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using System.Security.Permissions;
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namespace DrawGraph
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{
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/// <summary>
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/// This class handles the drawing of the curve <see cref="Symbol"/> objects.
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/// The symbols are the small shapes that appear over each defined point
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/// along the curve.
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/// </summary>
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///
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/// <author> John Champion </author>
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/// <version> $Revision: 3.34 $ $Date: 2007/04/16 00:03:02 $ </version>
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[Serializable]
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public class Symbol : ICloneable, ISerializable
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{
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#region Fields
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/// <summary>
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/// Private field that stores the size of this
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/// <see cref="Symbol"/> in points (1/72 inch). Use the public
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/// property <see cref="Size"/> to access this value.
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/// </summary>
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private float _size;
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/// <summary>
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/// Private field that stores the <see cref="SymbolType"/> for this
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/// <see cref="Symbol"/>. Use the public
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/// property <see cref="Type"/> to access this value.
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/// </summary>
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private SymbolType _type;
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/// <summary>
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/// private field that determines if the symbols are drawn using
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/// Anti-Aliasing capabilities from the <see cref="Graphics" /> class.
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/// Use the public property <see cref="IsAntiAlias" /> to access
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/// this value.
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/// </summary>
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private bool _isAntiAlias;
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/// <summary>
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/// Private field that stores the visibility of this
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/// <see cref="Symbol"/>. Use the public
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/// property <see cref="IsVisible"/> to access this value. If this value is
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/// false, the symbols will not be shown (but the <see cref="Line"/> may
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/// still be shown).
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/// </summary>
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private bool _isVisible;
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/// <summary>
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/// Private field that stores the <see cref="ZedGraph.Fill"/> data for this
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/// <see cref="Symbol"/>. Use the public property <see cref="Fill"/> to
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/// access this value.
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/// </summary>
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private Fill _fill;
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/// <summary>
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/// Private field that stores the <see cref="ZedGraph.Border"/> data for this
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/// <see cref="Symbol"/>. Use the public property <see cref="Border"/> to
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/// access this value.
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/// </summary>
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private Border _border;
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#endregion
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#region Defaults
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/// <summary>
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/// A simple struct that defines the
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/// default property values for the <see cref="ZedGraph.Symbol"/> class.
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/// </summary>
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public struct Default
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{
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// Default Symbol properties
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/// <summary>
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/// The default size for curve symbols (<see cref="Symbol.Size"/> property),
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/// in units of points.
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/// </summary>
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public static float Size = 7;
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/// <summary>
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/// The default pen width to be used for drawing curve symbols
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/// (<see cref="ZedGraph.LineBase.Width"/> property). Units are points.
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/// </summary>
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public static float PenWidth = 1.0F;
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/// <summary>
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/// The default color for filling in this <see cref="Symbol"/>
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/// (<see cref="ZedGraph.Fill.Color"/> property).
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/// </summary>
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public static Color FillColor = Color.Red;
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/// <summary>
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/// The default custom brush for filling in this <see cref="Symbol"/>
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/// (<see cref="ZedGraph.Fill.Brush"/> property).
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/// </summary>
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public static Brush FillBrush = null;
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/// <summary>
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/// The default fill mode for the curve (<see cref="ZedGraph.Fill.Type"/> property).
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/// </summary>
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public static FillType FillType = FillType.None;
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/// <summary>
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/// The default symbol type for curves (<see cref="Symbol.Type"/> property).
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/// This is defined as a <see cref="ZedGraph.SymbolType"/> enumeration.
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/// </summary>
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public static SymbolType Type = SymbolType.Square;
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/// <summary>
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/// The default value for the <see cref="Symbol.IsAntiAlias"/>
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/// property.
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/// </summary>
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public static bool IsAntiAlias = false;
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/// <summary>
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/// The default display mode for symbols (<see cref="Symbol.IsVisible"/> property).
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/// true to display symbols, false to hide them.
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/// </summary>
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public static bool IsVisible = true;
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/// <summary>
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/// The default for drawing frames around symbols (<see cref="ZedGraph.LineBase.IsVisible"/> property).
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/// true to display symbol frames, false to hide them.
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/// </summary>
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public static bool IsBorderVisible = true;
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/// <summary>
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/// The default color for drawing symbols (<see cref="ZedGraph.LineBase.Color"/> property).
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/// </summary>
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public static Color BorderColor = Color.Red;
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}
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#endregion
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#region Properties
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/// <summary>
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/// Gets or sets the size of the <see cref="Symbol"/>
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/// </summary>
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/// <value>Size in points (1/72 inch)</value>
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/// <seealso cref="Default.Size"/>
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public float Size
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{
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get { return _size; }
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set { _size = value; }
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}
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/// <summary>
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/// Gets or sets the type (shape) of the <see cref="Symbol"/>
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/// </summary>
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/// <value>A <see cref="SymbolType"/> enum value indicating the shape</value>
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/// <seealso cref="Default.Type"/>
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public SymbolType Type
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{
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get { return _type; }
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set { _type = value; }
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}
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/// <summary>
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/// Gets or sets a value that determines if the symbols are drawn using
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/// Anti-Aliasing capabilities from the <see cref="Graphics" /> class.
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/// </summary>
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/// <remarks>
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/// If this value is set to true, then the <see cref="Graphics.SmoothingMode" />
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/// property will be set to <see cref="SmoothingMode.HighQuality" /> only while
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/// this <see cref="Symbol" /> is drawn. A value of false will leave the value of
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/// <see cref="Graphics.SmoothingMode" /> unchanged.
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/// </remarks>
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public bool IsAntiAlias
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{
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get { return _isAntiAlias; }
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set { _isAntiAlias = value; }
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}
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/// <summary>
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/// Gets or sets a property that shows or hides the <see cref="Symbol"/>.
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/// </summary>
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/// <value>true to show the symbol, false to hide it</value>
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/// <seealso cref="Default.IsVisible"/>
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public bool IsVisible
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{
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get { return _isVisible; }
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set { _isVisible = value; }
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}
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/// <summary>
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/// Gets or sets the <see cref="ZedGraph.Fill"/> data for this
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/// <see cref="Symbol"/>.
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/// </summary>
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public Fill Fill
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{
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get { return _fill; }
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set { _fill = value; }
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}
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/// <summary>
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/// Gets or sets the <see cref="ZedGraph.Border"/> data for this
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/// <see cref="Symbol"/>, which controls the border outline of the symbol.
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/// </summary>
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public Border Border
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{
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get { return _border; }
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set { _border = value; }
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}
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#endregion
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#region Constructors
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/// <summary>
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/// Default constructor that sets all <see cref="Symbol"/> properties to default
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/// values as defined in the <see cref="Default"/> class.
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/// </summary>
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public Symbol() : this( SymbolType.Default, Color.Empty )
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{
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}
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/// <summary>
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/// Default constructor that sets the <see cref="SymbolType"/> and
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/// <see cref="Color"/> as specified, and the remaining
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/// <see cref="Symbol"/> properties to default
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/// values as defined in the <see cref="Default"/> class.
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/// </summary>
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/// <param name="type">A <see cref="SymbolType"/> enum value
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/// indicating the shape of the symbol</param>
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/// <param name="color">A <see cref="Color"/> value indicating
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/// the color of the symbol
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/// </param>
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public Symbol( SymbolType type, Color color )
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{
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_size = Default.Size;
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_type = type;
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_isAntiAlias = Default.IsAntiAlias;
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_isVisible = Default.IsVisible;
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_border = new Border( Default.IsBorderVisible, color, Default.PenWidth );
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_fill = new Fill( color, Default.FillBrush, Default.FillType );
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}
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/// <summary>
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/// The Copy Constructor
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/// </summary>
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/// <param name="rhs">The Symbol object from which to copy</param>
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public Symbol( Symbol rhs )
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{
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_size = rhs.Size;
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_type = rhs.Type;
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_isAntiAlias = rhs._isAntiAlias;
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_isVisible = rhs.IsVisible;
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_fill = rhs.Fill.Clone();
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_border = rhs.Border.Clone();
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}
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/// <summary>
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/// Implement the <see cref="ICloneable" /> interface in a typesafe manner by just
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/// calling the typed version of <see cref="Clone" />
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/// </summary>
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/// <returns>A deep copy of this object</returns>
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object ICloneable.Clone()
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{
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return this.Clone();
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}
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/// <summary>
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/// Typesafe, deep-copy clone method.
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/// </summary>
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/// <returns>A new, independent copy of this class</returns>
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public Symbol Clone()
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{
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return new Symbol( this );
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}
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#endregion
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#region Serialization
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/// <summary>
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/// Current schema value that defines the version of the serialized file
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/// </summary>
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public const int schema = 10;
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/// <summary>
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/// Constructor for deserializing objects
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/// </summary>
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/// <param name="info">A <see cref="SerializationInfo"/> instance that defines the serialized data
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/// </param>
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/// <param name="context">A <see cref="StreamingContext"/> instance that contains the serialized data
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/// </param>
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protected Symbol( SerializationInfo info, StreamingContext context )
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{
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// The schema value is just a file version parameter. You can use it to make future versions
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// backwards compatible as new member variables are added to classes
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int sch = info.GetInt32( "schema" );
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_size = info.GetSingle( "size" );
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_type = (SymbolType) info.GetValue( "type", typeof(SymbolType) );
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_isAntiAlias = info.GetBoolean( "isAntiAlias" );
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_isVisible = info.GetBoolean( "isVisible" );
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_fill = (Fill) info.GetValue( "fill", typeof(Fill) );
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_border = (Border) info.GetValue( "border", typeof(Border) );
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}
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/// <summary>
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/// Populates a <see cref="SerializationInfo"/> instance with the data needed to serialize the target object
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/// </summary>
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/// <param name="info">A <see cref="SerializationInfo"/> instance that defines the serialized data</param>
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/// <param name="context">A <see cref="StreamingContext"/> instance that contains the serialized data</param>
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[SecurityPermissionAttribute(SecurityAction.Demand,SerializationFormatter=true)]
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public virtual void GetObjectData( SerializationInfo info, StreamingContext context )
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{
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info.AddValue( "schema", schema );
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info.AddValue( "size", _size );
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info.AddValue( "type", _type );
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info.AddValue( "isAntiAlias", _isAntiAlias );
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info.AddValue( "isVisible", _isVisible );
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info.AddValue( "fill", _fill );
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info.AddValue( "border", _border );
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}
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#endregion
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#region Rendering Methods
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/// <summary>
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/// Draw the <see cref="Symbol"/> to the specified <see cref="Graphics"/> device
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/// at the specified location. This routine draws a single symbol.
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/// </summary>
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/// <param name="g">
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/// A graphic device object to be drawn into. This is normally e.Graphics from the
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/// PaintEventArgs argument to the Paint() method.
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/// </param>
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/// <param name="x">The x position of the center of the symbol in
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/// pixel units</param>
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/// <param name="y">The y position of the center of the symbol in
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/// pixel units</param>
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/// <param name="path">A <see cref="GraphicsPath"/> previously constructed by
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/// <see cref="MakePath"/> for this symbol</param>
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/// <param name="pen">A <see cref="Pen"/> class representing the standard pen for this symbol</param>
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/// <param name="brush">A <see cref="Brush"/> class representing a default solid brush for this symbol
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/// If this symbol uses a <see cref="LinearGradientBrush"/>, it will be created on the fly for
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/// each point, since it has to be scaled to the individual point coordinates.</param>
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private void DrawSymbol( Graphics g, float x, float y, GraphicsPath path,
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Pen pen, Brush brush )
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{
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// Only draw if the symbol is visible
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if ( _isVisible &&
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this.Type != SymbolType.None &&
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x < 100000 && x > -100000 &&
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y < 100000 && y > -100000 )
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{
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Matrix saveMatrix = g.Transform;
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g.TranslateTransform( x, y );
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// Fill or draw the symbol as required
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if ( _fill.IsVisible)
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g.FillPath( brush, path );
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//FillPoint( g, x, y, scaleFactor, pen, brush );
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if ( _border.IsVisible )
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g.DrawPath( pen, path );
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//DrawPoint( g, x, y, scaleFactor, pen );
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g.Transform = saveMatrix;
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}
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}
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/// <summary>
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/// Draw the <see cref="Symbol"/> to the specified <see cref="Graphics"/> device
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/// at the specified location. This routine draws a single symbol.
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/// </summary>
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/// <param name="g">
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/// A graphic device object to be drawn into. This is normally e.Graphics from the
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/// PaintEventArgs argument to the Paint() method.
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/// </param>
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/// <param name="pane">
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/// A reference to the <see cref="ZedGraph.GraphPane"/> object that is the parent or
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/// owner of this object.
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/// </param>
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/// <param name="x">The x position of the center of the symbol in
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/// pixel units</param>
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/// <param name="y">The y position of the center of the symbol in
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/// pixel units</param>
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/// <param name="scaleFactor">
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/// The scaling factor for the features of the graph based on the <see cref="PaneBase.BaseDimension"/>. This
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/// scaling factor is calculated by the <see cref="PaneBase.CalcScaleFactor"/> method. The scale factor
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/// represents a linear multiple to be applied to font sizes, symbol sizes, etc.
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/// </param>
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/// <param name="dataValue">The data value to be used for a value-based
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/// color gradient. This is only applicable for <see cref="FillType.GradientByX"/>,
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/// <see cref="FillType.GradientByY"/> or <see cref="FillType.GradientByZ"/>.</param>
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/// <param name="isSelected">Indicates that the <see cref="Symbol" /> should be drawn
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/// with attributes from the <see cref="Selection" /> class.
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/// </param>
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public void DrawSymbol( Graphics g, GraphPane pane, float x, float y,
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float scaleFactor, bool isSelected, PointPair dataValue )
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{
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Symbol source = this;
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if ( isSelected )
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source = Selection.Symbol;
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// Only draw if the symbol is visible
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if ( _isVisible &&
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this.Type != SymbolType.None &&
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x < 100000 && x > -100000 &&
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y < 100000 && y > -100000 )
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{
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SmoothingMode sModeSave = g.SmoothingMode;
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if ( _isAntiAlias )
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g.SmoothingMode = SmoothingMode.HighQuality;
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using ( Pen pen = _border.GetPen( pane, scaleFactor, dataValue ) )
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using ( GraphicsPath path = this.MakePath( g, scaleFactor ) )
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using ( Brush brush = this.Fill.MakeBrush( path.GetBounds(), dataValue ) )
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{
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DrawSymbol( g, x, y, path, pen, brush );
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}
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g.SmoothingMode = sModeSave;
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}
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}
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/// <summary>
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/// Create a <see cref="GraphicsPath"/> struct for the current symbol based on the
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/// specified scaleFactor and assuming the symbol will be centered at position 0,0.
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/// </summary>
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/// <param name="g">
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/// A graphic device object to be drawn into. This is normally e.Graphics from the
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/// PaintEventArgs argument to the Paint() method.
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/// </param>
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/// <param name="scaleFactor">
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/// The scaling factor for the features of the graph based on the <see cref="PaneBase.BaseDimension"/>. This
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/// scaling factor is calculated by the <see cref="PaneBase.CalcScaleFactor"/> method. The scale factor
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/// represents a linear multiple to be applied to font sizes, symbol sizes, etc.</param>
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/// <returns>Returns the <see cref="GraphicsPath"/> for the current symbol</returns>
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public GraphicsPath MakePath( Graphics g, float scaleFactor )
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{
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float scaledSize = (float) ( _size * scaleFactor );
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float hsize = scaledSize / 2,
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hsize1 = hsize + 1;
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GraphicsPath path = new GraphicsPath();
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switch( _type == SymbolType.Default ? Default.Type : _type )
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{
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case SymbolType.Square:
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path.AddLine( -hsize, -hsize, hsize, -hsize );
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path.AddLine( hsize, -hsize, hsize, hsize );
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path.AddLine( hsize, hsize, -hsize, hsize );
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path.AddLine( -hsize, hsize, -hsize, -hsize );
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break;
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case SymbolType.Diamond:
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path.AddLine( 0, -hsize, hsize, 0 );
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path.AddLine( hsize, 0, 0, hsize );
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path.AddLine( 0, hsize, -hsize, 0 );
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path.AddLine( -hsize, 0, 0, -hsize );
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break;
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case SymbolType.Triangle:
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path.AddLine( 0, -hsize, hsize, hsize );
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path.AddLine( hsize, hsize, -hsize, hsize );
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path.AddLine( -hsize, hsize, 0, -hsize );
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break;
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case SymbolType.Circle:
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path.AddEllipse( -hsize, -hsize, scaledSize, scaledSize );
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break;
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case SymbolType.XCross:
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path.AddLine( -hsize, -hsize, hsize1, hsize1 );
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path.StartFigure();
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path.AddLine( hsize, -hsize, -hsize1, hsize1 );
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break;
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case SymbolType.Plus:
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path.AddLine( 0, -hsize, 0, hsize1 );
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path.StartFigure();
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path.AddLine( -hsize, 0, hsize1, 0 );
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break;
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case SymbolType.Star:
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path.AddLine( 0, -hsize, 0, hsize1 );
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path.StartFigure();
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path.AddLine( -hsize, 0, hsize1, 0 );
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path.StartFigure();
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path.AddLine( -hsize, -hsize, hsize1, hsize1 );
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path.StartFigure();
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path.AddLine( hsize, -hsize, -hsize1, hsize1 );
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break;
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case SymbolType.TriangleDown:
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path.AddLine( 0, hsize, hsize, -hsize );
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path.AddLine( hsize, -hsize, -hsize, -hsize );
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path.AddLine( -hsize, -hsize, 0, hsize );
|
|
break;
|
|
case SymbolType.HDash:
|
|
path.AddLine( -hsize, 0, hsize1, 0 );
|
|
break;
|
|
case SymbolType.VDash:
|
|
path.AddLine( 0, -hsize, 0, hsize1 );
|
|
break;
|
|
}
|
|
|
|
return path;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Draw this <see cref="CurveItem"/> to the specified <see cref="Graphics"/>
|
|
/// device as a symbol at each defined point. The routine
|
|
/// only draws the symbols; the lines are draw by the
|
|
/// <see cref="Line.DrawCurve"/> method. This method
|
|
/// is normally only called by the Draw method of the
|
|
/// <see cref="CurveItem"/> object
|
|
/// </summary>
|
|
/// <param name="g">
|
|
/// A graphic device object to be drawn into. This is normally e.Graphics from the
|
|
/// PaintEventArgs argument to the Paint() method.
|
|
/// </param>
|
|
/// <param name="pane">
|
|
/// A reference to the <see cref="GraphPane"/> object that is the parent or
|
|
/// owner of this object.
|
|
/// </param>
|
|
/// <param name="curve">A <see cref="LineItem"/> representing this
|
|
/// curve.</param>
|
|
/// <param name="scaleFactor">
|
|
/// The scaling factor to be used for rendering objects. This is calculated and
|
|
/// passed down by the parent <see cref="GraphPane"/> object using the
|
|
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
|
|
/// font sizes, etc. according to the actual size of the graph.
|
|
/// </param>
|
|
/// <param name="isSelected">Indicates that the <see cref="Symbol" /> should be drawn
|
|
/// with attributes from the <see cref="Selection" /> class.
|
|
/// </param>
|
|
public void Draw( Graphics g, GraphPane pane, LineItem curve, float scaleFactor,
|
|
bool isSelected )
|
|
{
|
|
Symbol source = this;
|
|
if ( isSelected )
|
|
source = Selection.Symbol;
|
|
|
|
float tmpX, tmpY;
|
|
double curX, curY, lowVal;
|
|
IPointList points = curve.Points;
|
|
|
|
if ( points != null && ( _border.IsVisible || _fill.IsVisible ) )
|
|
{
|
|
SmoothingMode sModeSave = g.SmoothingMode;
|
|
if ( _isAntiAlias )
|
|
g.SmoothingMode = SmoothingMode.HighQuality;
|
|
|
|
// For the sake of speed, go ahead and create a solid brush and a pen
|
|
// If it's a gradient fill, it will be created on the fly for each symbol
|
|
//SolidBrush brush = new SolidBrush( this.fill.Color );
|
|
|
|
using ( Pen pen = source._border.GetPen( pane, scaleFactor ) )
|
|
using ( GraphicsPath path = MakePath( g, scaleFactor ) )
|
|
{
|
|
RectangleF rect = path.GetBounds();
|
|
|
|
using ( Brush brush = source.Fill.MakeBrush( rect ) )
|
|
{
|
|
ValueHandler valueHandler = new ValueHandler( pane, false );
|
|
Scale xScale = curve.GetXAxis( pane ).Scale;
|
|
Scale yScale = curve.GetYAxis( pane ).Scale;
|
|
|
|
bool xIsLog = xScale.IsLog;
|
|
bool yIsLog = yScale.IsLog;
|
|
|
|
double xMin = xScale.Min;
|
|
double xMax = xScale.Max;
|
|
|
|
// Loop over each defined point
|
|
for ( int i = 0; i < points.Count; i++ )
|
|
{
|
|
// Get the user scale values for the current point
|
|
// use the valueHandler only for stacked types
|
|
if ( pane.LineType == LineType.Stack )
|
|
{
|
|
valueHandler.GetValues( curve, i, out curX, out lowVal, out curY );
|
|
}
|
|
// otherwise, just access the values directly. Avoiding the valueHandler for
|
|
// non-stacked types is an optimization to minimize overhead in case there are
|
|
// a large number of points.
|
|
else
|
|
{
|
|
curX = points[i].X;
|
|
if ( curve is StickItem )
|
|
curY = points[i].Z;
|
|
else
|
|
curY = points[i].Y;
|
|
}
|
|
|
|
// Any value set to double max is invalid and should be skipped
|
|
// This is used for calculated values that are out of range, divide
|
|
// by zero, etc.
|
|
// Also, any value <= zero on a log scale is invalid
|
|
|
|
if ( curX != PointPair.Missing &&
|
|
curY != PointPair.Missing &&
|
|
!System.Double.IsNaN( curX ) &&
|
|
!System.Double.IsNaN( curY ) &&
|
|
!System.Double.IsInfinity( curX ) &&
|
|
!System.Double.IsInfinity( curY ) &&
|
|
( curX > 0 || !xIsLog ) &&
|
|
( !yIsLog || curY > 0.0 ) &&
|
|
curX >= xMin && curX <= xMax )
|
|
{
|
|
// Transform the user scale values to pixel locations
|
|
tmpX = xScale.Transform( curve.IsOverrideOrdinal, i, curX );
|
|
tmpY = yScale.Transform( curve.IsOverrideOrdinal, i, curY );
|
|
|
|
// If the fill type for this symbol is a Gradient by value type,
|
|
// the make a brush corresponding to the appropriate current value
|
|
if ( _fill.IsGradientValueType || _border._gradientFill.IsGradientValueType )
|
|
{
|
|
using ( Brush tBrush = _fill.MakeBrush( rect, points[i] ) )
|
|
using ( Pen tPen = _border.GetPen( pane, scaleFactor, points[i] ) )
|
|
this.DrawSymbol( g, tmpX, tmpY, path, tPen, tBrush );
|
|
}
|
|
else
|
|
{
|
|
// Otherwise, the brush is already defined
|
|
// Draw the symbol at the specified pixel location
|
|
this.DrawSymbol( g, tmpX, tmpY, path, pen, brush );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
g.SmoothingMode = sModeSave;
|
|
}
|
|
}
|
|
#endregion
|
|
|
|
}
|
|
}
|
|
|