245 lines
9.2 KiB
C#
245 lines
9.2 KiB
C#
//============================================================================
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//ZedGraph Class Library - A Flexible Line Graph/Bar Graph Library in C#
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//Copyright ?2005 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.Collections;
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using System.Text;
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using System.Drawing;
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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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/// The LinearAsOrdinalScale class inherits from the <see cref="Scale" /> class, and implements
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/// the features specific to <see cref="AxisType.LinearAsOrdinal" />.
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/// </summary>
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/// <remarks>
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/// LinearAsOrdinal is an ordinal axis that will have labels formatted with values from the actual data
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/// values of the first <see cref="CurveItem" /> in the <see cref="CurveList" />.
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/// Although the tics are labeled with real data values, the actual points will be
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/// evenly-spaced in spite of the data values. For example, if the X values of the first curve
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/// are 1, 5, and 100, then the tic labels will show 1, 5, and 100, but they will be equal
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/// distance from each other.
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/// </remarks>
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///
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/// <author> John Champion </author>
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/// <version> $Revision: 1.10 $ $Date: 2007/04/16 00:03:02 $ </version>
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[Serializable]
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class LinearAsOrdinalScale : Scale, ISerializable //, ICloneable
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{
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#region constructors
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/// <summary>
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/// Default constructor that defines the owner <see cref="Axis" />
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/// (containing object) for this new object.
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/// </summary>
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/// <param name="owner">The owner, or containing object, of this instance</param>
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public LinearAsOrdinalScale( Axis owner )
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: base( owner )
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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="LinearAsOrdinalScale" /> object from which to copy</param>
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/// <param name="owner">The <see cref="Axis" /> object that will own the
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/// new instance of <see cref="LinearAsOrdinalScale" /></param>
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public LinearAsOrdinalScale( Scale rhs, Axis owner )
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: base( rhs, owner )
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{
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}
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/// <summary>
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/// Create a new clone of the current item, with a new owner assignment
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/// </summary>
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/// <param name="owner">The new <see cref="Axis" /> instance that will be
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/// the owner of the new Scale</param>
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/// <returns>A new <see cref="Scale" /> clone.</returns>
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public override Scale Clone( Axis owner )
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{
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return new LinearAsOrdinalScale( this, owner );
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}
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#endregion
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#region properties
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/// <summary>
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/// Return the <see cref="AxisType" /> for this <see cref="Scale" />, which is
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/// <see cref="AxisType.LinearAsOrdinal" />.
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/// </summary>
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public override AxisType Type
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{
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get { return AxisType.LinearAsOrdinal; }
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}
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#endregion
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#region methods
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/// <summary>
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/// Select a reasonable ordinal axis scale given a range of data values, with the expectation that
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/// linear values will be displayed.
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/// </summary>
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/// <remarks>
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/// This method only applies to <see cref="AxisType.DateAsOrdinal"/> type axes, and it
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/// is called by the general <see cref="Scale.PickScale"/> method. For this type,
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/// the first curve is the "master", which contains the dates to be applied.
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/// <para>On Exit:</para>
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/// <para><see cref="Scale.Min"/> is set to scale minimum (if <see cref="Scale.MinAuto"/> = true)</para>
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/// <para><see cref="Scale.Max"/> is set to scale maximum (if <see cref="Scale.MaxAuto"/> = true)</para>
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/// <para><see cref="Scale.MajorStep"/> is set to scale step size (if <see cref="Scale.MajorStepAuto"/> = true)</para>
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/// <para><see cref="Scale.MinorStep"/> is set to scale minor step size (if <see cref="Scale.MinorStepAuto"/> = true)</para>
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/// <para><see cref="Scale.Mag"/> is set to a magnitude multiplier according to the data</para>
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/// <para><see cref="Scale.Format"/> is set to the display format for the values (this controls the
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/// number of decimal places, whether there are thousands separators, currency types, etc.)</para>
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/// </remarks>
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/// <param name="pane">A reference to the <see cref="GraphPane"/> object
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/// associated with this <see cref="Axis"/></param>
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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 to be used for rendering objects. This is calculated and
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/// passed down by the parent <see cref="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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/// <seealso cref="PickScale"/>
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/// <seealso cref="AxisType.Ordinal"/>
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override public void PickScale( GraphPane pane, Graphics g, float scaleFactor )
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{
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// call the base class first
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base.PickScale( pane, g, scaleFactor );
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// First, get the date ranges from the first curve in the list
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double xMin; // = Double.MaxValue;
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double xMax; // = Double.MinValue;
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double yMin; // = Double.MaxValue;
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double yMax; // = Double.MinValue;
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double tMin = 0;
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double tMax = 1;
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foreach ( CurveItem curve in pane.CurveList )
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{
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if ( ( _ownerAxis is Y2Axis && curve.IsY2Axis ) ||
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( _ownerAxis is YAxis && !curve.IsY2Axis ) ||
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( _ownerAxis is X2Axis && curve.IsX2Axis ) ||
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( _ownerAxis is XAxis && !curve.IsX2Axis ) )
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{
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curve.GetRange( out xMin, out xMax, out yMin, out yMax, false, false, pane );
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if ( _ownerAxis is XAxis || _ownerAxis is X2Axis )
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{
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tMin = xMin;
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tMax = xMax;
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}
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else
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{
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tMin = yMin;
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tMax = yMax;
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}
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}
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}
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double range = Math.Abs( tMax - tMin );
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// Now, set the axis range based on a ordinal scale
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base.PickScale( pane, g, scaleFactor );
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OrdinalScale.PickScale( pane, g, scaleFactor, this );
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SetScaleMag( tMin, tMax, range / Default.TargetXSteps );
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}
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/// <summary>
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/// Make a value label for an <see cref="AxisType.LinearAsOrdinal" /> <see cref="Axis" />.
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/// </summary>
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/// <param name="pane">
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/// A reference to the <see cref="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="index">
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/// The zero-based, ordinal index of the label to be generated. For example, a value of 2 would
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/// cause the third value label on the axis to be generated.
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/// </param>
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/// <param name="dVal">
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/// The numeric value associated with the label. This value is ignored for log (<see cref="Scale.IsLog"/>)
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/// and text (<see cref="Scale.IsText"/>) type axes.
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/// </param>
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/// <returns>The resulting value label as a <see cref="string" /></returns>
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override internal string MakeLabel( GraphPane pane, int index, double dVal )
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{
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if ( _format == null )
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_format = Scale.Default.Format;
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double val;
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int tmpIndex = (int) dVal - 1;
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if ( pane.CurveList.Count > 0 && pane.CurveList[0].Points.Count > tmpIndex )
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{
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val = pane.CurveList[0].Points[tmpIndex].X;
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double scaleMult = Math.Pow( (double) 10.0, _mag );
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return ( val / scaleMult ).ToString( _format );
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}
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else
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return string.Empty;
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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 LinearAsOrdinalScale( 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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}
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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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}
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#endregion
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}
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}
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