946 lines
31 KiB
C#
946 lines
31 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 DateScale class inherits from the <see cref="Scale" /> class, and implements
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/// the features specific to <see cref="AxisType.Date" />.
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/// </summary>
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/// <remarks>
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/// DateScale is a cartesian axis with calendar dates or times. The actual data values should
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/// be created with the <see cref="XDate" /> type, which is directly translatable to a
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/// <see cref="System.Double" /> type for storage in the point value arrays.
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/// </remarks>
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///
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/// <author> John Champion </author>
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/// <version> $Revision: 1.14 $ $Date: 2007/04/16 00:03:01 $ </version>
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[Serializable]
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class DateScale : 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 DateScale( 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="DateScale" /> 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="DateScale" /></param>
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public DateScale( 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 DateScale( 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.Date" />.
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/// </summary>
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public override AxisType Type
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{
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get { return AxisType.Date; }
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}
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/// <summary>
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/// Gets or sets the minimum value for this scale.
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/// </summary>
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/// <remarks>
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/// The set property is specifically adapted for <see cref="AxisType.Date" /> scales,
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/// in that it automatically limits the value to the range of valid dates for the
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/// <see cref="XDate" /> struct.
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/// </remarks>
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public override double Min
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{
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get { return _min; }
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set { _min = XDate.MakeValidDate( value ); _minAuto = false; }
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}
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/// <summary>
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/// Gets or sets the maximum value for this scale.
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/// </summary>
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/// <remarks>
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/// The set property is specifically adapted for <see cref="AxisType.Date" /> scales,
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/// in that it automatically limits the value to the range of valid dates for the
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/// <see cref="XDate" /> struct.
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/// </remarks>
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public override double Max
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{
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get { return _max; }
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set { _max = XDate.MakeValidDate( value ); _maxAuto = false; }
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}
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#endregion
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#region methods
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/// <summary>
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/// Determine the value for any major tic.
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/// </summary>
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/// <remarks>
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/// This method properly accounts for <see cref="Scale.IsLog"/>, <see cref="Scale.IsText"/>,
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/// and other axis format settings.
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/// </remarks>
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/// <param name="baseVal">
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/// The value of the first major tic (floating point double)
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/// </param>
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/// <param name="tic">
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/// The major tic number (0 = first major tic). For log scales, this is the actual power of 10.
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/// </param>
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/// <returns>
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/// The specified major tic value (floating point double).
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/// </returns>
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override internal double CalcMajorTicValue( double baseVal, double tic )
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{
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XDate xDate = new XDate( baseVal );
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switch ( _majorUnit )
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{
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case DateUnit.Year:
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default:
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xDate.AddYears( tic * _majorStep );
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break;
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case DateUnit.Month:
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xDate.AddMonths( tic * _majorStep );
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break;
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case DateUnit.Day:
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xDate.AddDays( tic * _majorStep );
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break;
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case DateUnit.Hour:
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xDate.AddHours( tic * _majorStep );
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break;
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case DateUnit.Minute:
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xDate.AddMinutes( tic * _majorStep );
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break;
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case DateUnit.Second:
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xDate.AddSeconds( tic * _majorStep );
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break;
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case DateUnit.Millisecond:
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xDate.AddMilliseconds( tic * _majorStep );
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break;
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}
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return xDate.XLDate;
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}
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/// <summary>
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/// Determine the value for any minor tic.
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/// </summary>
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/// <remarks>
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/// This method properly accounts for <see cref="Scale.IsLog"/>, <see cref="Scale.IsText"/>,
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/// and other axis format settings.
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/// </remarks>
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/// <param name="baseVal">
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/// The value of the first major tic (floating point double). This tic value is the base
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/// reference for all tics (including minor ones).
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/// </param>
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/// <param name="iTic">
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/// The major tic number (0 = first major tic). For log scales, this is the actual power of 10.
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/// </param>
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/// <returns>
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/// The specified minor tic value (floating point double).
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/// </returns>
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override internal double CalcMinorTicValue( double baseVal, int iTic )
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{
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XDate xDate = new XDate( baseVal );
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switch ( _minorUnit )
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{
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case DateUnit.Year:
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default:
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xDate.AddYears( (double) iTic * _minorStep );
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break;
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case DateUnit.Month:
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xDate.AddMonths( (double) iTic * _minorStep );
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break;
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case DateUnit.Day:
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xDate.AddDays( (double) iTic * _minorStep );
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break;
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case DateUnit.Hour:
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xDate.AddHours( (double) iTic * _minorStep );
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break;
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case DateUnit.Minute:
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xDate.AddMinutes( (double) iTic * _minorStep );
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break;
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case DateUnit.Second:
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xDate.AddSeconds( (double) iTic * _minorStep );
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break;
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}
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return xDate.XLDate;
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}
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/// <summary>
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/// Internal routine to determine the ordinals of the first minor tic mark
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/// </summary>
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/// <param name="baseVal">
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/// The value of the first major tic for the axis.
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/// </param>
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/// <returns>
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/// The ordinal position of the first minor tic, relative to the first major tic.
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/// This value can be negative (e.g., -3 means the first minor tic is 3 minor step
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/// increments before the first major tic.
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/// </returns>
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override internal int CalcMinorStart( double baseVal )
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{
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switch ( _minorUnit )
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{
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case DateUnit.Year:
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default:
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return (int) ( ( _min - baseVal ) / ( 365.0 * _minorStep ) );
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case DateUnit.Month:
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return (int) ( ( _min - baseVal ) / ( 28.0 * _minorStep ) );
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case DateUnit.Day:
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return (int) ( ( _min - baseVal ) / _minorStep );
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case DateUnit.Hour:
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return (int) ( ( _min - baseVal ) * XDate.HoursPerDay / _minorStep );
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case DateUnit.Minute:
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return (int) ( ( _min - baseVal ) * XDate.MinutesPerDay / _minorStep );
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case DateUnit.Second:
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return (int) ( ( _min - baseVal ) * XDate.SecondsPerDay / _minorStep );
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}
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}
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/// <summary>
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/// Determine the value for the first major tic.
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/// </summary>
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/// <remarks>
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/// This is done by finding the first possible value that is an integral multiple of
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/// the step size, taking into account the date/time units if appropriate.
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/// This method properly accounts for <see cref="Scale.IsLog"/>, <see cref="Scale.IsText"/>,
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/// and other axis format settings.
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/// </remarks>
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/// <returns>
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/// First major tic value (floating point double).
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/// </returns>
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override internal double CalcBaseTic()
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{
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if ( _baseTic != PointPair.Missing )
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return _baseTic;
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else
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{
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int year, month, day, hour, minute, second, millisecond;
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XDate.XLDateToCalendarDate( _min, out year, out month, out day, out hour, out minute,
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out second, out millisecond );
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switch ( _majorUnit )
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{
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case DateUnit.Year:
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default:
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month = 1; day = 1; hour = 0; minute = 0; second = 0; millisecond = 0;
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break;
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case DateUnit.Month:
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day = 1; hour = 0; minute = 0; second = 0; millisecond = 0;
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break;
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case DateUnit.Day:
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hour = 0; minute = 0; second = 0; millisecond = 0;
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break;
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case DateUnit.Hour:
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minute = 0; second = 0; millisecond = 0;
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break;
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case DateUnit.Minute:
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second = 0; millisecond = 0;
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break;
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case DateUnit.Second:
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millisecond = 0;
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break;
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case DateUnit.Millisecond:
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break;
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}
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double xlDate = XDate.CalendarDateToXLDate( year, month, day, hour, minute, second, millisecond );
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if ( xlDate < _min )
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{
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switch ( _majorUnit )
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{
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case DateUnit.Year:
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default:
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year++;
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break;
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case DateUnit.Month:
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month++;
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break;
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case DateUnit.Day:
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day++;
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break;
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case DateUnit.Hour:
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hour++;
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break;
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case DateUnit.Minute:
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minute++;
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break;
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case DateUnit.Second:
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second++;
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break;
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case DateUnit.Millisecond:
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millisecond++;
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break;
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}
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xlDate = XDate.CalendarDateToXLDate( year, month, day, hour, minute, second, millisecond );
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}
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return xlDate;
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}
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}
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/// <summary>
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/// Internal routine to determine the ordinals of the first and last major axis label.
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/// </summary>
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/// <returns>
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/// This is the total number of major tics for this axis.
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/// </returns>
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override internal int CalcNumTics()
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{
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int nTics = 1;
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int year1, year2, month1, month2, day1, day2, hour1, hour2, minute1, minute2;
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int second1, second2, millisecond1, millisecond2;
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XDate.XLDateToCalendarDate( _min, out year1, out month1, out day1,
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out hour1, out minute1, out second1, out millisecond1 );
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XDate.XLDateToCalendarDate( _max, out year2, out month2, out day2,
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out hour2, out minute2, out second2, out millisecond2 );
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switch ( _majorUnit )
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{
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case DateUnit.Year:
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default:
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nTics = (int) ( ( year2 - year1 ) / _majorStep + 1.001 );
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break;
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case DateUnit.Month:
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nTics = (int) ( ( month2 - month1 + 12.0 * ( year2 - year1 ) ) / _majorStep + 1.001 );
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break;
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case DateUnit.Day:
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nTics = (int) ( ( _max - _min ) / _majorStep + 1.001 );
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break;
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case DateUnit.Hour:
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nTics = (int) ( ( _max - _min ) / ( _majorStep / XDate.HoursPerDay ) + 1.001 );
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break;
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case DateUnit.Minute:
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nTics = (int) ( ( _max - _min ) / ( _majorStep / XDate.MinutesPerDay ) + 1.001 );
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break;
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case DateUnit.Second:
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nTics = (int)( ( _max - _min ) / ( _majorStep / XDate.SecondsPerDay ) + 1.001 );
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break;
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case DateUnit.Millisecond:
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nTics = (int)( ( _max - _min ) / ( _majorStep / XDate.MillisecondsPerDay ) + 1.001 );
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break;
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}
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if ( nTics < 1 )
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nTics = 1;
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else if ( nTics > 1000 )
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nTics = 1000;
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return nTics;
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}
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/// <summary>
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/// Select a reasonable date-time axis scale given a range of data values.
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/// </summary>
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/// <remarks>
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/// This method only applies to <see cref="AxisType.Date"/> type axes, and it
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/// is called by the general <see cref="PickScale"/> method. The scale range is chosen
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/// based on increments of 1, 2, or 5 (because they are even divisors of 10).
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/// Note that the <see cref="Scale.MajorStep"/> property setting can have multiple unit
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/// types (<see cref="Scale.MajorUnit"/> and <see cref="Scale.MinorUnit" />),
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/// but the <see cref="Scale.Min"/> and
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/// <see cref="Scale.Max"/> units are always days (<see cref="XDate"/>). This
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/// method honors the <see cref="Scale.MinAuto"/>, <see cref="Scale.MaxAuto"/>,
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/// and <see cref="Scale.MajorStepAuto"/> autorange settings.
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/// In the event that any of the autorange settings are false, the
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/// corresponding <see cref="Scale.Min"/>, <see cref="Scale.Max"/>, or <see cref="Scale.MajorStep"/>
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/// setting is explicitly honored, and the remaining autorange settings (if any) will
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/// be calculated to accomodate the non-autoranged values. The basic default for
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/// scale selection is defined with
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/// <see cref="Scale.Default.TargetXSteps"/> and <see cref="Scale.Default.TargetYSteps"/>
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/// from the <see cref="Scale.Default"/> default class.
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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="Scale.PickScale"/>
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/// <seealso cref="AxisType.Date"/>
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/// <seealso cref="Scale.MajorUnit"/>
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/// <seealso cref="Scale.MinorUnit"/>
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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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// Test for trivial condition of range = 0 and pick a suitable default
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if ( _max - _min < 1.0e-20 )
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{
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if ( _maxAuto )
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_max = _max + 0.2 * ( _max == 0 ? 1.0 : Math.Abs( _max ) );
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if ( _minAuto )
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_min = _min - 0.2 * ( _min == 0 ? 1.0 : Math.Abs( _min ) );
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}
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// Calculate the new step size
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if ( _majorStepAuto )
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{
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double targetSteps = ( _ownerAxis is XAxis || _ownerAxis is X2Axis ) ?
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Default.TargetXSteps : Default.TargetYSteps;
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// Calculate the step size based on target steps
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_majorStep = CalcDateStepSize( _max - _min, targetSteps );
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if ( _isPreventLabelOverlap )
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{
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// Calculate the maximum number of labels
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double maxLabels = (double) this.CalcMaxLabels( g, pane, scaleFactor );
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if ( maxLabels < this.CalcNumTics() )
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_majorStep = CalcDateStepSize( _max - _min, maxLabels );
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}
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}
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// Calculate the scale minimum
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if ( _minAuto )
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_min = CalcEvenStepDate( _min, -1 );
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// Calculate the scale maximum
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if ( _maxAuto )
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_max = CalcEvenStepDate( _max, 1 );
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_mag = 0; // Never use a magnitude shift for date scales
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//this.numDec = 0; // The number of decimal places to display is not used
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}
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/// <summary>
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/// Calculate a step size for a <see cref="AxisType.Date"/> scale.
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/// This method is used by <see cref="PickScale"/>.
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/// </summary>
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/// <param name="range">The range of data in units of days</param>
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/// <param name="targetSteps">The desired "typical" number of steps
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/// to divide the range into</param>
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/// <returns>The calculated step size for the specified data range. Also
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/// calculates and sets the values for <see cref="Scale.MajorUnit"/>,
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/// <see cref="Scale.MinorUnit"/>, <see cref="Scale.MinorStep"/>, and
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/// <see cref="Scale.Format"/></returns>
|
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protected double CalcDateStepSize( double range, double targetSteps )
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{
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return CalcDateStepSize( range, targetSteps, this );
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}
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/// <summary>
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/// Calculate a step size for a <see cref="AxisType.Date"/> scale.
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/// This method is used by <see cref="PickScale"/>.
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/// </summary>
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/// <param name="range">The range of data in units of days</param>
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/// <param name="targetSteps">The desired "typical" number of steps
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/// to divide the range into</param>
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/// <param name="scale">
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/// The <see cref="Scale" /> object on which to calculate the Date step size.</param>
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/// <returns>The calculated step size for the specified data range. Also
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/// calculates and sets the values for <see cref="Scale.MajorUnit"/>,
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/// <see cref="Scale.MinorUnit"/>, <see cref="Scale.MinorStep"/>, and
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/// <see cref="Scale.Format"/></returns>
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internal static double CalcDateStepSize( double range, double targetSteps, Scale scale )
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{
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// Calculate an initial guess at step size
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double tempStep = range / targetSteps;
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if ( range > Default.RangeYearYear )
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{
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scale._majorUnit = DateUnit.Year;
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if ( scale._formatAuto )
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scale._format = Default.FormatYearYear;
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tempStep = Math.Ceiling( tempStep / 365.0 );
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Year;
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if ( tempStep == 1.0 )
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scale._minorStep = 0.25;
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else
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scale._minorStep = Scale.CalcStepSize( tempStep, targetSteps );
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}
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}
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else if ( range > Default.RangeYearMonth )
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{
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scale._majorUnit = DateUnit.Year;
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if ( scale._formatAuto )
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scale._format = Default.FormatYearMonth;
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tempStep = Math.Ceiling( tempStep / 365.0 );
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Month;
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// Calculate the minor steps to give an estimated 4 steps
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// per major step.
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scale._minorStep = Math.Ceiling( range / ( targetSteps * 3 ) / 30.0 );
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// make sure the minorStep is 1, 2, 3, 6, or 12 months
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if ( scale._minorStep > 6 )
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scale._minorStep = 12;
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else if ( scale._minorStep > 3 )
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scale._minorStep = 6;
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}
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}
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else if ( range > Default.RangeMonthMonth )
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{
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scale._majorUnit = DateUnit.Month;
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if ( scale._formatAuto )
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scale._format = Default.FormatMonthMonth;
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tempStep = Math.Ceiling( tempStep / 30.0 );
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Month;
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scale._minorStep = tempStep * 0.25;
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}
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}
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else if ( range > Default.RangeDayDay )
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{
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scale._majorUnit = DateUnit.Day;
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if ( scale._formatAuto )
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scale._format = Default.FormatDayDay;
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tempStep = Math.Ceiling( tempStep );
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Day;
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scale._minorStep = tempStep * 0.25;
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// make sure the minorStep is 1, 2, 3, 6, or 12 hours
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}
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}
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else if ( range > Default.RangeDayHour )
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{
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scale._majorUnit = DateUnit.Day;
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if ( scale._formatAuto )
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scale._format = Default.FormatDayHour;
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tempStep = Math.Ceiling( tempStep );
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Hour;
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// Calculate the minor steps to give an estimated 4 steps
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// per major step.
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scale._minorStep = Math.Ceiling( range / ( targetSteps * 3 ) * XDate.HoursPerDay );
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// make sure the minorStep is 1, 2, 3, 6, or 12 hours
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if ( scale._minorStep > 6 )
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scale._minorStep = 12;
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else if ( scale._minorStep > 3 )
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scale._minorStep = 6;
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else
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scale._minorStep = 1;
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}
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}
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else if ( range > Default.RangeHourHour )
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{
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scale._majorUnit = DateUnit.Hour;
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tempStep = Math.Ceiling( tempStep * XDate.HoursPerDay );
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if ( scale._formatAuto )
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scale._format = Default.FormatHourHour;
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if ( tempStep > 12.0 )
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tempStep = 24.0;
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else if ( tempStep > 6.0 )
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tempStep = 12.0;
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else if ( tempStep > 2.0 )
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tempStep = 6.0;
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else if ( tempStep > 1.0 )
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tempStep = 2.0;
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else
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tempStep = 1.0;
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Hour;
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if ( tempStep <= 1.0 )
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scale._minorStep = 0.25;
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else if ( tempStep <= 6.0 )
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scale._minorStep = 1.0;
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else if ( tempStep <= 12.0 )
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scale._minorStep = 2.0;
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else
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scale._minorStep = 4.0;
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}
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}
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else if ( range > Default.RangeHourMinute )
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{
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scale._majorUnit = DateUnit.Hour;
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tempStep = Math.Ceiling( tempStep * XDate.HoursPerDay );
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if ( scale._formatAuto )
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scale._format = Default.FormatHourMinute;
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Minute;
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// Calculate the minor steps to give an estimated 4 steps
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// per major step.
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scale._minorStep = Math.Ceiling( range / ( targetSteps * 3 ) * XDate.MinutesPerDay );
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// make sure the minorStep is 1, 5, 15, or 30 minutes
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if ( scale._minorStep > 15.0 )
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scale._minorStep = 30.0;
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else if ( scale._minorStep > 5.0 )
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scale._minorStep = 15.0;
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else if ( scale._minorStep > 1.0 )
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scale._minorStep = 5.0;
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else
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scale._minorStep = 1.0;
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}
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}
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else if ( range > Default.RangeMinuteMinute )
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{
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scale._majorUnit = DateUnit.Minute;
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if ( scale._formatAuto )
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scale._format = Default.FormatMinuteMinute;
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tempStep = Math.Ceiling( tempStep * XDate.MinutesPerDay );
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// make sure the minute step size is 1, 5, 15, or 30 minutes
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if ( tempStep > 15.0 )
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tempStep = 30.0;
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else if ( tempStep > 5.0 )
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tempStep = 15.0;
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else if ( tempStep > 1.0 )
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tempStep = 5.0;
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else
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tempStep = 1.0;
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Minute;
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if ( tempStep <= 1.0 )
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scale._minorStep = 0.25;
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else if ( tempStep <= 5.0 )
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scale._minorStep = 1.0;
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else
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scale._minorStep = 5.0;
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}
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}
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else if ( range > Default.RangeMinuteSecond )
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{
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scale._majorUnit = DateUnit.Minute;
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tempStep = Math.Ceiling( tempStep * XDate.MinutesPerDay );
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if ( scale._formatAuto )
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scale._format = Default.FormatMinuteSecond;
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Second;
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// Calculate the minor steps to give an estimated 4 steps
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// per major step.
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scale._minorStep = Math.Ceiling( range / ( targetSteps * 3 ) * XDate.SecondsPerDay );
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// make sure the minorStep is 1, 5, 15, or 30 seconds
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if ( scale._minorStep > 15.0 )
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scale._minorStep = 30.0;
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else if ( scale._minorStep > 5.0 )
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scale._minorStep = 15.0;
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else if ( scale._minorStep > 1.0 )
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scale._minorStep = 5.0;
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else
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scale._minorStep = 1.0;
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}
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}
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else if ( range > Default.RangeSecondSecond ) // SecondSecond
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{
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scale._majorUnit = DateUnit.Second;
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if ( scale._formatAuto )
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scale._format = Default.FormatSecondSecond;
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tempStep = Math.Ceiling( tempStep * XDate.SecondsPerDay );
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// make sure the second step size is 1, 5, 15, or 30 seconds
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if ( tempStep > 15.0 )
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tempStep = 30.0;
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else if ( tempStep > 5.0 )
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tempStep = 15.0;
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else if ( tempStep > 1.0 )
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tempStep = 5.0;
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else
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tempStep = 1.0;
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if ( scale._minorStepAuto )
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{
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scale._minorUnit = DateUnit.Second;
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if ( tempStep <= 1.0 )
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scale._minorStep = 0.25;
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else if ( tempStep <= 5.0 )
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scale._minorStep = 1.0;
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else
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scale._minorStep = 5.0;
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}
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}
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else // MilliSecond
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{
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scale._majorUnit = DateUnit.Millisecond;
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if ( scale._formatAuto )
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scale._format = Default.FormatMillisecond;
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tempStep = CalcStepSize( range * XDate.MillisecondsPerDay, Default.TargetXSteps );
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if ( scale._minorStepAuto )
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{
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scale._minorStep = CalcStepSize( tempStep,
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( scale._ownerAxis is XAxis || scale._ownerAxis is X2Axis ) ?
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Default.TargetMinorXSteps : Default.TargetMinorYSteps );
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scale._minorUnit = DateUnit.Millisecond;
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}
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}
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return tempStep;
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}
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/// <summary>
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/// Calculate a date that is close to the specified date and an
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/// even multiple of the selected
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/// <see cref="Scale.MajorUnit"/> for a <see cref="AxisType.Date"/> scale.
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/// This method is used by <see cref="PickScale"/>.
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/// </summary>
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/// <param name="date">The date which the calculation should be close to</param>
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/// <param name="direction">The desired direction for the date to take.
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/// 1 indicates the result date should be greater than the specified
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/// date parameter. -1 indicates the other direction.</param>
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/// <returns>The calculated date</returns>
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protected double CalcEvenStepDate( double date, int direction )
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{
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int year, month, day, hour, minute, second, millisecond;
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XDate.XLDateToCalendarDate( date, out year, out month, out day,
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out hour, out minute, out second, out millisecond );
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// If the direction is -1, then it is sufficient to go to the beginning of
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// the current time period, .e.g., for 15-May-95, and monthly steps, we
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// can just back up to 1-May-95
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if ( direction < 0 )
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direction = 0;
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switch ( _majorUnit )
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{
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case DateUnit.Year:
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default:
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// If the date is already an exact year, then don't step to the next year
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if ( direction == 1 && month == 1 && day == 1 && hour == 0
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&& minute == 0 && second == 0 )
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return date;
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else
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return XDate.CalendarDateToXLDate( year + direction, 1, 1,
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0, 0, 0 );
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case DateUnit.Month:
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// If the date is already an exact month, then don't step to the next month
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if ( direction == 1 && day == 1 && hour == 0
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&& minute == 0 && second == 0 )
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return date;
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else
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return XDate.CalendarDateToXLDate( year, month + direction, 1,
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0, 0, 0 );
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case DateUnit.Day:
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// If the date is already an exact Day, then don't step to the next day
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if ( direction == 1 && hour == 0 && minute == 0 && second == 0 )
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return date;
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else
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return XDate.CalendarDateToXLDate( year, month,
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day + direction, 0, 0, 0 );
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case DateUnit.Hour:
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// If the date is already an exact hour, then don't step to the next hour
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if ( direction == 1 && minute == 0 && second == 0 )
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return date;
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else
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return XDate.CalendarDateToXLDate( year, month, day,
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hour + direction, 0, 0 );
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case DateUnit.Minute:
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// If the date is already an exact minute, then don't step to the next minute
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if ( direction == 1 && second == 0 )
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return date;
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else
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return XDate.CalendarDateToXLDate( year, month, day, hour,
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minute + direction, 0 );
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case DateUnit.Second:
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return XDate.CalendarDateToXLDate( year, month, day, hour,
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minute, second + direction );
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case DateUnit.Millisecond:
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return XDate.CalendarDateToXLDate( year, month, day, hour,
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minute, second, millisecond + direction );
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}
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}
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/// <summary>
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/// Make a value label for an <see cref="AxisType.Date" /> <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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return XDate.ToString( dVal, _format );
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}
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/// <summary>
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/// Gets the major unit multiplier for this scale type, if any.
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/// </summary>
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/// <remarks>The major unit multiplier will correct the units of
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/// <see cref="Scale.MajorStep" /> to match the units of <see cref="Scale.Min" />
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/// and <see cref="Scale.Max" />. This reflects the setting of
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/// <see cref="Scale.MajorUnit" />.
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/// </remarks>
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override internal double MajorUnitMultiplier
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{
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get { return GetUnitMultiple( _majorUnit ); }
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}
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/// <summary>
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/// Gets the minor unit multiplier for this scale type, if any.
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/// </summary>
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/// <remarks>The minor unit multiplier will correct the units of
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/// <see cref="Scale.MinorStep" /> to match the units of <see cref="Scale.Min" />
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/// and <see cref="Scale.Max" />. This reflects the setting of
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/// <see cref="Scale.MinorUnit" />.
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/// </remarks>
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override internal double MinorUnitMultiplier
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{
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get { return GetUnitMultiple( _minorUnit ); }
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}
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/// <summary>
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/// Internal routine to calculate a multiplier to the selected unit back to days.
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/// </summary>
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/// <param name="unit">The unit type for which the multiplier is to be
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/// calculated</param>
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/// <returns>
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/// This is ratio of days/selected unit
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/// </returns>
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private double GetUnitMultiple( DateUnit unit )
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{
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switch ( unit )
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{
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case DateUnit.Year:
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default:
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return 365.0;
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case DateUnit.Month:
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return 30.0;
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case DateUnit.Day:
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return 1.0;
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case DateUnit.Hour:
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return 1.0 / XDate.HoursPerDay;
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case DateUnit.Minute:
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return 1.0 / XDate.MinutesPerDay;
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case DateUnit.Second:
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return 1.0 / XDate.SecondsPerDay;
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case DateUnit.Millisecond:
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return 1.0 / XDate.MillisecondsPerDay;
|
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}
|
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}
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#endregion
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|
|
#region Serialization
|
|
/// <summary>
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/// Current schema value that defines the version of the serialized file
|
|
/// </summary>
|
|
public const int schema2 = 10;
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|
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/// <summary>
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/// Constructor for deserializing objects
|
|
/// </summary>
|
|
/// <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
|
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/// </param>
|
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protected DateScale( SerializationInfo info, StreamingContext context ) : base( info, context )
|
|
{
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|
// The schema value is just a file version parameter. You can use it to make future versions
|
|
// backwards compatible as new member variables are added to classes
|
|
int sch = info.GetInt32( "schema2" );
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|
|
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}
|
|
/// <summary>
|
|
/// Populates a <see cref="SerializationInfo"/> instance with the data needed to serialize the target object
|
|
/// </summary>
|
|
/// <param name="info">A <see cref="SerializationInfo"/> instance that defines the serialized data</param>
|
|
/// <param name="context">A <see cref="StreamingContext"/> instance that contains the serialized data</param>
|
|
[SecurityPermissionAttribute(SecurityAction.Demand,SerializationFormatter=true)]
|
|
public override void GetObjectData( SerializationInfo info, StreamingContext context )
|
|
{
|
|
base.GetObjectData( info, context );
|
|
info.AddValue( "schema2", schema2 );
|
|
}
|
|
#endregion
|
|
|
|
}
|
|
}
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