58 lines
1.6 KiB
C#
58 lines
1.6 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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namespace Microsoft.Research.DynamicDataDisplay.ViewportRestrictions
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{
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public class ScaleInjectionRestriction : ViewportRestriction
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{
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private Viewport2D parentViewport;
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public ScaleInjectionRestriction(Viewport2D parentViewport)
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{
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if (parentViewport == null)
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throw new ArgumentNullException("parentViewport");
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this.parentViewport = parentViewport;
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parentViewport.PropertyChanged += parentViewport_PropertyChanged;
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}
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private void parentViewport_PropertyChanged(object sender, ExtendedPropertyChangedEventArgs e)
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{
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if (e.PropertyName == "Visible")
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{
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RaiseChanged();
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}
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}
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public void SetHorizontalTransform(double parentMin, double childMin, double parentMax, double childMax)
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{
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xScale = (childMax - childMin) / (parentMax - parentMin);
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xShift = childMin - parentMin;
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}
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public void SetVerticalTransform(double parentMin, double childMin, double parentMax, double childMax)
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{
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yScale = (childMax - childMin) / (parentMax - parentMin);
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yShift = childMin - parentMin;
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}
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private double xShift = 0;
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private double xScale = 1;
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private double yShift = 0;
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private double yScale = 1;
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public override DataRect Apply(DataRect previousDataRect, DataRect proposedDataRect, Viewport2D viewport)
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{
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DataRect parentVisible = parentViewport.Visible;
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double xmin = parentVisible.XMin * xScale + xShift;
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double xmax = parentVisible.XMax * xScale + xShift;
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double ymin = parentVisible.YMin * yScale + yShift;
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double ymax = parentVisible.YMax * yScale + yShift;
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return DataRect.Create(xmin, ymin, xmax, ymax);
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}
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}
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}
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