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[12503] | 1 | using System;
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| 2 | using System.Collections.Generic;
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| 3 | using System.Linq;
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| 4 | using System.Text;
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| 5 | using System.Windows;
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| 6 |
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| 7 | namespace Microsoft.Research.DynamicDataDisplay.ViewportConstraints
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| 8 | {
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| 9 | /// <summary>
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| 10 | /// Represents a ViewportConstraint, which the minimal size of <see cref="Viewport"/>'s Visible.
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| 11 | /// </summary>
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| 12 | public class MinimalSizeConstraint : ViewportConstraint
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| 13 | {
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| 14 | private double minSize = 1E-11;
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| 15 |
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| 16 | /// <summary>
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| 17 | /// Gets or sets the minimal size of Viewport's Visible.
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| 18 | /// </summary>
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| 19 | /// <value>The minimal size of Viewport's Visible.</value>
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| 20 | public double MinSize
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| 21 | {
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| 22 | get { return minSize; }
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| 23 | set
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| 24 | {
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| 25 | if (minSize != value)
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| 26 | {
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| 27 | minSize = value;
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| 28 | RaiseChanged();
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| 29 | }
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| 30 | }
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| 31 | }
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| 32 |
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| 33 | /// <summary>
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| 34 | /// Applies the restriction.
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| 35 | /// </summary>
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| 36 | /// <param name="previousDataRect">Previous data rectangle.</param>
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| 37 | /// <param name="proposedDataRect">Proposed data rectangle.</param>
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| 38 | /// <param name="viewport">The viewport, to which current restriction is being applied.</param>
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| 39 | /// <returns>New changed visible rectangle.</returns>
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| 40 | public override DataRect Apply(DataRect previousDataRect, DataRect proposedDataRect, Viewport2D viewport)
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| 41 | {
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| 42 | if (proposedDataRect.Width < minSize || proposedDataRect.Height < minSize)
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| 43 | return previousDataRect;
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| 44 |
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| 45 | return proposedDataRect;
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| 46 | }
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| 47 | }
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| 48 | }
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