396 lines
15 KiB
C#
396 lines
15 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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/// Encapsulates a curve type that is displayed as a line and/or a set of
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/// symbols at each point.
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/// </summary>
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///
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/// <author> John Champion </author>
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/// <version> $Revision: 3.21 $ $Date: 2007/04/16 00:03:02 $ </version>
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[Serializable]
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public class LineItem : 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.Symbol"/>
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/// class defined for this <see cref="LineItem"/>. Use the public
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/// property <see cref="Symbol"/> to access this value.
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/// </summary>
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protected Symbol _symbol;
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/// <summary>
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/// Private field that stores a reference to the <see cref="ZedGraph.Line"/>
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/// class defined for this <see cref="LineItem"/>. Use the public
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/// property <see cref="Line"/> to access this value.
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/// </summary>
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protected Line _line;
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#endregion
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#region Properties
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/// <summary>
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/// Gets or sets the <see cref="ZedGraph.Symbol"/> class instance defined
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/// for this <see cref="LineItem"/>.
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/// </summary>
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public Symbol Symbol
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{
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get { return _symbol; }
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set { _symbol = value; }
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}
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/// <summary>
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/// Gets or sets the <see cref="ZedGraph.Line"/> class instance defined
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/// for this <see cref="LineItem"/>.
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/// </summary>
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public Line Line
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{
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get { return _line; }
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set { _line = value; }
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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 false;
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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 true;
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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="LineItem"/>, specifying only the legend <see cref="CurveItem.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 LineItem( string label ) : base( label )
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{
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_symbol = new Symbol();
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_line = new Line();
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}
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/// <summary>
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/// Create a new <see cref="LineItem"/> 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 independent (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 dependent (Y axis) 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"/> and <see cref="Symbol"/> properties.
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/// </param>
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/// <param name="symbolType">A <see cref="SymbolType"/> enum specifying the
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/// type of symbol to use for this <see cref="LineItem"/>. Use <see cref="SymbolType.None"/>
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/// to hide the symbols.</param>
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/// <param name="lineWidth">The width (in points) to be used for the <see cref="Line"/>. This
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/// width is scaled based on <see cref="PaneBase.CalcScaleFactor"/>. Use a value of zero to
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/// hide the line (see <see cref="ZedGraph.LineBase.IsVisible"/>).</param>
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public LineItem( string label, double[] x, double[] y, Color color, SymbolType symbolType, float lineWidth )
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: this( label, new PointPairList( x, y ), color, symbolType, lineWidth )
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{
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}
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/// <summary>
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/// Create a new <see cref="LineItem"/> 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 independent (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 dependent (Y axis) 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"/> and <see cref="Symbol"/> properties.
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/// </param>
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/// <param name="symbolType">A <see cref="SymbolType"/> enum specifying the
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/// type of symbol to use for this <see cref="LineItem"/>. Use <see cref="SymbolType.None"/>
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/// to hide the symbols.</param>
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public LineItem( string label, double[] x, double[] y, Color color, SymbolType symbolType )
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: this( label, new PointPairList( x, y ), color, symbolType )
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{
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}
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/// <summary>
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/// Create a new <see cref="LineItem"/> 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 value pairs that define
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/// the X and Y 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"/> and <see cref="Symbol"/> properties.
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/// </param>
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/// <param name="symbolType">A <see cref="SymbolType"/> enum specifying the
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/// type of symbol to use for this <see cref="LineItem"/>. Use <see cref="SymbolType.None"/>
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/// to hide the symbols.</param>
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/// <param name="lineWidth">The width (in points) to be used for the <see cref="Line"/>. This
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/// width is scaled based on <see cref="PaneBase.CalcScaleFactor"/>. Use a value of zero to
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/// hide the line (see <see cref="ZedGraph.LineBase.IsVisible"/>).</param>
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public LineItem( string label, IPointList points, Color color, SymbolType symbolType, float lineWidth )
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: base( label, points )
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{
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_line = new Line( color );
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if ( lineWidth == 0 )
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_line.IsVisible = false;
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else
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_line.Width = lineWidth;
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_symbol = new Symbol( symbolType, color );
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}
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/// <summary>
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/// Create a new <see cref="LineItem"/> 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 value pairs that define
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/// the X and Y 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"/> and <see cref="Symbol"/> properties.
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/// </param>
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/// <param name="symbolType">A <see cref="SymbolType"/> enum specifying the
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/// type of symbol to use for this <see cref="LineItem"/>. Use <see cref="SymbolType.None"/>
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/// to hide the symbols.</param>
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public LineItem( string label, IPointList points, Color color, SymbolType symbolType )
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: this( label, points, color, symbolType, DrawGraph.LineBase.Default.Width )
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{
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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="LineItem"/> object from which to copy</param>
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public LineItem( LineItem rhs ) : base( rhs )
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{
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_symbol = new Symbol( rhs.Symbol );
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_line = new Line( rhs.Line );
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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 LineItem Clone()
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{
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return new LineItem( 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 LineItem( 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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_symbol = (Symbol) info.GetValue( "symbol", typeof(Symbol) );
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_line = (Line) info.GetValue( "line", typeof(Line) );
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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( "symbol", _symbol );
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info.AddValue( "line", _line );
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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="LineItem"/> 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="Bar"/>
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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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Line.Draw( g, pane, this, scaleFactor );
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Symbol.Draw( g, pane, this, scaleFactor, IsSelected );
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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="LineItem"/> 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, float scaleFactor )
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{
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// Draw a sample curve to the left of the label text
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float yMid = rect.Top + rect.Height / 2.0F;
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//RectangleF rect2 = rect;
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//rect2.Y = yMid;
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//rect2.Height = rect.Height / 2.0f;
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_line.Fill.Draw( g, rect );
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_line.DrawSegment( g, pane, rect.Left, yMid, rect.Right, yMid, scaleFactor );
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// Draw a sample symbol to the left of the label text
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_symbol.DrawSymbol( g, pane, rect.Left + rect.Width / 2.0F, yMid, scaleFactor,
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false, null );
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}
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/// <summary>
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/// Loads some pseudo unique colors/symbols into this LineItem. This
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/// is mainly useful for differentiating a set of new LineItems without
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/// having to pick your own colors/symbols.
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/// <seealso cref="CurveItem.MakeUnique( ColorSymbolRotator )"/>
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/// </summary>
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/// <param name="rotator">
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/// The <see cref="ColorSymbolRotator"/> that is used to pick the color
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/// and symbol for this method call.
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/// </param>
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override public void MakeUnique( ColorSymbolRotator rotator )
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{
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this.Color = rotator.NextColor;
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this.Symbol.Type = rotator.NextSymbol;
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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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PointPair pt = _points[i];
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if ( pt.IsInvalid )
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return false;
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double x, y, z;
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ValueHandler valueHandler = new ValueHandler( pane, false );
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valueHandler.GetValues( this, i, out x, out z, out y );
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Axis yAxis = GetYAxis( pane );
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Axis xAxis = GetXAxis( pane );
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PointF pixPt = new PointF( xAxis.Scale.Transform( _isOverrideOrdinal, i, x ),
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yAxis.Scale.Transform( _isOverrideOrdinal, i, y ) );
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if ( !pane.Chart.Rect.Contains( pixPt ) )
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return false;
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float halfSize = _symbol.Size * pane.CalcScaleFactor();
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coords = String.Format( "{0:f0},{1:f0},{2:f0},{3:f0}",
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pixPt.X - halfSize, pixPt.Y - halfSize,
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pixPt.X + halfSize, pixPt.Y + halfSize );
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return true;
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}
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#endregion
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}
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}
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