365 lines
14 KiB
C#
365 lines
14 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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#region Using directives
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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.Text;
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using System.Runtime.Serialization;
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using System.Security.Permissions;
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#endregion
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namespace DrawGraph
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{
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/// <summary>
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/// Encapsulates an "Error Bar" curve type that displays a vertical or horizontal
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/// line with a symbol at each end.
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/// </summary>
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/// <remarks>The <see cref="ErrorBarItem"/> type is intended for displaying
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/// confidence intervals, candlesticks, stock High-Low charts, etc. It is
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/// technically not a bar, since it is drawn as a vertical or horizontal line.
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/// The default symbol at each end of the "bar" is <see cref="SymbolType.HDash"/>,
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/// which creates an "I-Beam". For horizontal bars
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/// (<see cref="ZedGraph.BarBase.Y"/> or
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/// <see cref="ZedGraph.BarBase.Y2"/>), you will need to change the symbol to
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/// <see cref="SymbolType.VDash"/> to get horizontal "I-Beams".
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/// Since the horizontal segments are actually symbols, their widths are
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/// controlled by the symbol size in <see cref="ZedGraph.ErrorBar.Symbol"/>,
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/// specified in points (1/72nd inch). The position of each "I-Beam" is set
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/// according to the <see cref="PointPair"/> values. The independent axis
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/// is assigned with <see cref="BarSettings.Base"/>, and is a
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/// <see cref="ZedGraph.BarBase"/> enum type.</remarks>
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/// <author> John Champion </author>
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/// <version> $Revision: 3.19 $ $Date: 2007/04/16 00:03:01 $ </version>
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[Serializable]
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public class ErrorBarItem : CurveItem, 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 a reference to the <see cref="ZedGraph.ErrorBar"/>
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/// class defined for this <see cref="ErrorBarItem"/>. Use the public
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/// property <see cref="ErrorBar"/> to access this value.
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/// </summary>
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private ErrorBar _bar;
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#endregion
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#region Properties
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/// <summary>
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/// Gets a reference to the <see cref="ZedGraph.ErrorBar"/> class defined
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/// for this <see cref="ErrorBarItem"/>.
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/// </summary>
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public ErrorBar Bar
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{
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get { return _bar; }
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}
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/// <summary>
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/// Gets a flag indicating if the Z data range should be included in the axis scaling calculations.
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/// </summary>
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/// <param name="pane">The parent <see cref="GraphPane" /> of this <see cref="CurveItem" />.
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/// </param>
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/// <value>true if the Z data are included, false otherwise</value>
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override internal bool IsZIncluded( GraphPane pane )
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{
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return true;
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}
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/// <summary>
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/// Gets a flag indicating if the X axis is the independent axis for this <see cref="CurveItem" />
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/// </summary>
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/// <param name="pane">The parent <see cref="GraphPane" /> of this <see cref="CurveItem" />.
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/// </param>
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/// <value>true if the X axis is independent, false otherwise</value>
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override internal bool IsXIndependent( GraphPane pane )
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{
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return pane._barSettings.Base == BarBase.X;
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}
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#endregion
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#region Constructors
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/// <summary>
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/// Create a new <see cref="ErrorBarItem"/>, specifying only the legend label.
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/// </summary>
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/// <param name="label">The label that will appear in the legend.</param>
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public ErrorBarItem( string label ) : base( label )
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{
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_bar = new ErrorBar();
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}
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/// <summary>
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/// Create a new <see cref="ErrorBarItem"/> using the specified properties.
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/// </summary>
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/// <param name="label">The label that will appear in the legend.</param>
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/// <param name="x">An array of double precision values that define
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/// the X axis values for this curve</param>
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/// <param name="y">An array of double precision values that define
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/// the Y axis values for this curve</param>
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/// <param name="lowValue">An array of double precision values that define
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/// the lower dependent values for this curve</param>
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/// <param name="color">A <see cref="Color"/> value that will be applied to
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/// the <see cref="Line"/> properties.
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/// </param>
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public ErrorBarItem( string label, double[] x, double[] y, double[] lowValue,
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System.Drawing.Color color )
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: this( label, new PointPairList( x, y, lowValue ), color )
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{
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}
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/// <summary>
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/// Create a new <see cref="ErrorBarItem"/> using the specified properties.
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/// </summary>
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/// <param name="label">The label that will appear in the legend.</param>
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/// <param name="points">A <see cref="IPointList"/> of double precision values that define
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/// the X, Y and lower dependent values for this curve</param>
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/// <param name="color">A <see cref="Color"/> value that will be applied to
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/// the <see cref="Line"/> properties.
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/// </param>
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public ErrorBarItem( string label, IPointList points, Color color )
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: base( label, points )
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{
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_bar = new ErrorBar( color );
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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 <see cref="ErrorBarItem"/> object from which to copy</param>
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public ErrorBarItem( ErrorBarItem rhs ) : base( rhs )
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{
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_bar = new ErrorBar( rhs.Bar );
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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 ErrorBarItem Clone()
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{
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return new ErrorBarItem( 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 schema2 = 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 ErrorBarItem( SerializationInfo info, StreamingContext context ) : base( info, 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( "schema2" );
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_bar = (ErrorBar) info.GetValue( "bar", typeof(ErrorBar) );
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// This is now just a dummy variable, since barBase was removed
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BarBase barBase = (BarBase) info.GetValue( "barBase", typeof(BarBase) );
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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 override void GetObjectData( SerializationInfo info, StreamingContext context )
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{
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base.GetObjectData( info, context );
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info.AddValue( "schema2", schema2 );
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info.AddValue( "bar", _bar );
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// BarBase is now just a dummy value, since the GraphPane.BarBase is used exclusively
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info.AddValue( "barBase", BarBase.X );
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}
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#endregion
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#region Methods
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/// <summary>
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/// Do all rendering associated with this <see cref="ErrorBarItem"/> to the specified
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/// <see cref="Graphics"/> device. This method is normally only
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/// called by the Draw method of the parent <see cref="ZedGraph.CurveList"/>
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/// collection object.
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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="pos">The ordinal position of the current <see cref="ErrorBarItem"/>
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/// curve.</param>
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/// <param name="scaleFactor">
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/// The scaling factor to be used for rendering objects. This is calculated and
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/// passed down by the parent <see cref="ZedGraph.GraphPane"/> object using the
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/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
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/// font sizes, etc. according to the actual size of the graph.
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/// </param>
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override public void Draw( Graphics g, GraphPane pane, int pos, float scaleFactor )
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{
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if ( _isVisible )
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{
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_bar.Draw( g, pane, this, this.BaseAxis( pane ),
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this.ValueAxis( pane ), scaleFactor );
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}
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}
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/// <summary>
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/// Draw a legend key entry for this <see cref="ErrorBarItem"/> at the specified location
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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="rect">The <see cref="RectangleF"/> struct that specifies the
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/// location for the legend key</param>
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/// <param name="scaleFactor">
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/// The scaling factor to be used for rendering objects. This is calculated and
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/// passed down by the parent <see cref="ZedGraph.GraphPane"/> object using the
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/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
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/// font sizes, etc. according to the actual size of the graph.
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/// </param>
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override public void DrawLegendKey( Graphics g, GraphPane pane, RectangleF rect,
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float scaleFactor )
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{
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float pixBase, pixValue, pixLowValue;
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if ( pane._barSettings.Base == BarBase.X )
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{
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pixBase = rect.Left + rect.Width / 2.0F;
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pixValue = rect.Top;
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pixLowValue = rect.Bottom;
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}
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else
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{
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pixBase = rect.Top + rect.Height / 2.0F;
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pixValue = rect.Right;
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pixLowValue = rect.Left;
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}
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using ( Pen pen = new Pen( _bar.Color, _bar.PenWidth ) )
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{
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this.Bar.Draw( g, pane, pane._barSettings.Base == BarBase.X, pixBase, pixValue,
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pixLowValue, scaleFactor, pen, false, null );
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}
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}
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/// <summary>
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/// Determine the coords for the rectangle associated with a specified point for
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/// this <see cref="CurveItem" />
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/// </summary>
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/// <param name="pane">The <see cref="GraphPane" /> to which this curve belongs</param>
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/// <param name="i">The index of the point of interest</param>
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/// <param name="coords">A list of coordinates that represents the "rect" for
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/// this point (used in an html AREA tag)</param>
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/// <returns>true if it's a valid point, false otherwise</returns>
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override public bool GetCoords( GraphPane pane, int i, out string coords )
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{
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coords = string.Empty;
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if ( i < 0 || i >= _points.Count )
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return false;
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Axis valueAxis = ValueAxis( pane );
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Axis baseAxis = BaseAxis( pane );
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float scaledSize = _bar.Symbol.Size * pane.CalcScaleFactor();
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// pixBase = pixel value for the bar center on the base axis
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// pixHiVal = pixel value for the bar top on the value axis
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// pixLowVal = pixel value for the bar bottom on the value axis
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float pixBase, pixHiVal, pixLowVal;
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float clusterWidth = pane.BarSettings.GetClusterWidth();
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float barWidth = GetBarWidth( pane );
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float clusterGap = pane._barSettings.MinClusterGap * barWidth;
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float barGap = barWidth * pane._barSettings.MinBarGap;
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// curBase = the scale value on the base axis of the current bar
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// curHiVal = the scale value on the value axis of the current bar
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// curLowVal = the scale value of the bottom of the bar
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double curBase, curLowVal, curHiVal;
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ValueHandler valueHandler = new ValueHandler( pane, false );
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valueHandler.GetValues( this, i, out curBase, out curLowVal, out curHiVal );
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// Any value set to double max is invalid and should be skipped
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// This is used for calculated values that are out of range, divide
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// by zero, etc.
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// Also, any value <= zero on a log scale is invalid
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if ( !_points[i].IsInvalid3D )
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{
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// calculate a pixel value for the top of the bar on value axis
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pixLowVal = valueAxis.Scale.Transform( _isOverrideOrdinal, i, curLowVal );
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pixHiVal = valueAxis.Scale.Transform( _isOverrideOrdinal, i, curHiVal );
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// calculate a pixel value for the center of the bar on the base axis
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pixBase = baseAxis.Scale.Transform( _isOverrideOrdinal, i, curBase );
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// Calculate the pixel location for the side of the bar (on the base axis)
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float pixSide = pixBase - scaledSize / 2.0F;
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// Draw the bar
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if ( baseAxis is XAxis || baseAxis is X2Axis )
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coords = String.Format( "{0:f0},{1:f0},{2:f0},{3:f0}",
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pixSide, pixLowVal,
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pixSide + scaledSize, pixHiVal );
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else
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coords = String.Format( "{0:f0},{1:f0},{2:f0},{3:f0}",
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pixLowVal, pixSide,
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pixHiVal, pixSide + scaledSize );
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return true;
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}
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return false;
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}
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#endregion
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}
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}
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