81 lines
2.0 KiB
C#
81 lines
2.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Windows;
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using Microsoft.Research.DynamicDataDisplay.Common;
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namespace Microsoft.Research.DynamicDataDisplay.ViewportRestrictions
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{
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/// <summary>
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/// Represents a restriction which returns data rectangle, intersected with specified data domain.
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/// </summary>
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public class DomainRestriction : ViewportRestriction
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="DomainRestriction"/> class.
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/// </summary>
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public DomainRestriction() { }
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/// <summary>
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/// Initializes a new instance of the <see cref="DomainRestriction"/> class with given domain property.
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/// </summary>
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/// <param name="domain">The domain.</param>
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public DomainRestriction(DataRect domain)
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{
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this.Domain = domain;
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}
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private DataRect domain = new DataRect(-1, -1, 2, 2);
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/// <summary>
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/// Gets or sets the domain.
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/// </summary>
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/// <value>The domain.</value>
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public DataRect Domain
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{
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get { return domain; }
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set
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{
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if (domain != value)
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{
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domain = value;
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RaiseChanged();
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}
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}
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}
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/// <summary>
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/// Applies the specified old data rect.
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/// </summary>
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/// <param name="oldDataRect">The old data rect.</param>
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/// <param name="newDataRect">The new data rect.</param>
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/// <param name="viewport">The viewport.</param>
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/// <returns></returns>
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public override DataRect Apply(DataRect oldDataRect, DataRect newDataRect, Viewport2D viewport)
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{
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DataRect res = domain;
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if (domain.IsEmpty)
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{
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res = newDataRect;
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}
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else if (newDataRect.IntersectsWith(domain))
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{
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res = newDataRect;
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if (newDataRect.Size == oldDataRect.Size)
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{
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if (res.XMin < domain.XMin) res.XMin = domain.XMin;
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if (res.YMin < domain.YMin) res.YMin = domain.YMin;
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if (res.XMax > domain.XMax) res.XMin += domain.XMax - res.XMax;
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if (res.YMax > domain.YMax) res.YMin += domain.YMax - res.YMax;
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}
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else
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{
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res = DataRect.Intersect(newDataRect, domain);
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}
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}
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return res;
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}
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}
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}
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