private static bool ValidateCacheSizeBeforeOrAfterViewport(object value)
{
VirtualizationCacheLength cacheLength = (VirtualizationCacheLength)value;
return(DoubleUtil.GreaterThanOrClose(cacheLength.CacheBeforeViewport, 0.0) &&
DoubleUtil.GreaterThanOrClose(cacheLength.CacheAfterViewport, 0.0));
}
public override object ConvertTo(ITypeDescriptorContext typeDescriptorContext, CultureInfo cultureInfo, object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException("destinationType");
}
if (value != null && value is VirtualizationCacheLength)
{
VirtualizationCacheLength cacheLength = (VirtualizationCacheLength)value;
if (destinationType == typeof(string))
{
return(VirtualizationCacheLengthConverter.ToString(cacheLength, cultureInfo));
}
if (destinationType == typeof(InstanceDescriptor))
{
ConstructorInfo constructor = typeof(VirtualizationCacheLength).GetConstructor(new Type[]
{
typeof(double),
typeof(VirtualizationCacheLengthUnit)
});
return(new InstanceDescriptor(constructor, new object[]
{
cacheLength.CacheBeforeViewport,
cacheLength.CacheAfterViewport
}));
}
}
throw base.GetConvertToException(value, destinationType);
}
/// <summary>Initializes a new instance of the <see cref="T:System.Windows.Controls.HierarchicalVirtualizationConstraints" /> class.</summary>
/// <param name="cacheLength">The size of the cache before and after the viewport.</param>
/// <param name="cacheLengthUnit">The type of unit that is used by the <see cref="P:System.Windows.Controls.HierarchicalVirtualizationConstraints.CacheLength" /> property.</param>
/// <param name="viewport">The size of the cache before and after the viewport.</param>
// Token: 0x06005412 RID: 21522 RVA: 0x00174D2F File Offset: 0x00172F2F
public HierarchicalVirtualizationConstraints(VirtualizationCacheLength cacheLength, VirtualizationCacheLengthUnit cacheLengthUnit, Rect viewport)
{
this._cacheLength = cacheLength;
this._cacheLengthUnit = cacheLengthUnit;
this._viewport = viewport;
this._scrollGeneration = 0L;
}
/// <summary>Sets the <see cref="P:System.Windows.Controls.VirtualizingPanel.CacheLength" /> attached property.</summary>
/// <param name="element">The object to set the property on.</param>
/// <param name="value">The size of the cache before and after the viewport when the <see cref="T:System.Windows.Controls.VirtualizingPanel" /> is virtualizing.</param>
// Token: 0x06005A1C RID: 23068 RVA: 0x0018D557 File Offset: 0x0018B757
public static void SetCacheLength(DependencyObject element, VirtualizationCacheLength value)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
element.SetValue(VirtualizingPanel.CacheLengthProperty, value);
}
// Token: 0x0600540E RID: 21518 RVA: 0x00174C2C File Offset: 0x00172E2C
internal static string ToString(VirtualizationCacheLength cacheLength, CultureInfo cultureInfo)
{
char numericListSeparator = TokenizerHelper.GetNumericListSeparator(cultureInfo);
StringBuilder stringBuilder = new StringBuilder(26);
stringBuilder.Append(cacheLength.CacheBeforeViewport.ToString(cultureInfo));
stringBuilder.Append(numericListSeparator);
stringBuilder.Append(cacheLength.CacheAfterViewport.ToString(cultureInfo));
return(stringBuilder.ToString());
}
//-------------------------------------------------------------------
//
// Internal Methods
//
//-------------------------------------------------------------------
#region Internal Methods
/// <summary>
/// Creates a string from a VirtualizationCacheLength given the CultureInfo.
/// </summary>
/// <param name="cacheLength">VirtualizationCacheLength.</param>
/// <param name="cultureInfo">Culture Info.</param>
/// <returns>Newly created string instance.</returns>
static internal string ToString(VirtualizationCacheLength cacheLength, CultureInfo cultureInfo)
{
char listSeparator = TokenizerHelper.GetNumericListSeparator(cultureInfo);
// Initial capacity [64] is an estimate based on a sum of:
// 24 = 2x double (twelve digits is generous for the range of values likely)
// 2 = 2x separator characters
// Is 26 really a good number???
StringBuilder sb = new StringBuilder(26);
sb.Append(cacheLength.CacheBeforeViewport.ToString(cultureInfo));
sb.Append(listSeparator);
sb.Append(cacheLength.CacheAfterViewport.ToString(cultureInfo));
return(sb.ToString());
}
