Class LineSizeCollection

A collection that manages lines with varying height and hidden state. It has properties for header and footer lines, total line count, default size of a line and also lets you add nested collections.

Inheritance
System.Object
LineSizeCollection
EmptyLineSizeCollection
Namespace: Syncfusion.Windows.Controls.Scroll
Assembly: Syncfusion.GridCommon.WPF.dll
Syntax
public class LineSizeCollection : Object, IPaddedEditableLineSizeHost, IEditableLineSizeHost, ILineSizeHost, IDistancesHost, INestedDistancesHost, IDisposable

Constructors

LineSizeCollection()

Declaration
public LineSizeCollection()

Fields

Empty

Returns an empty collection.

Declaration
public static readonly LineSizeCollection Empty
Field Value
Type
LineSizeCollection

Properties

DefaultLineSize

Gets or sets the default size of lines.

Declaration
public double DefaultLineSize { get; set; }
Property Value
Type Description
System.Double

The default size of lines.

Distances

Gets or sets the distances.

Declaration
public IDistanceCounterCollection Distances { get; }
Property Value
Type Description
IDistanceCounterCollection

The distances.

FooterLineCount

Gets or sets the footer line count.

Declaration
public int FooterLineCount { get; set; }
Property Value
Type Description
System.Int32

The footer line count.

HeaderLineCount

Gets or sets the header line count.

Declaration
public int HeaderLineCount { get; set; }
Property Value
Type Description
System.Int32

The header line count.

Item[Int32]

Gets or sets the line size at the specified index.

Declaration
public double this[int index] { get; set; }
Parameters
Type Name Description
System.Int32 index
Property Value
Type
System.Double

LineCount

Gets or sets the line count.

Declaration
public int LineCount { get; set; }
Property Value
Type Description
System.Int32

The line count.

PaddingDistance

Declaration
public double PaddingDistance { get; set; }
Property Value
Type
System.Double

SupportsInsertRemove

Gets whether the host supports inserting and removing lines.

Declaration
public bool SupportsInsertRemove { get; }
Property Value
Type
System.Boolean

SupportsNestedLines

Gets whether the host supports nesting.

Declaration
public bool SupportsNestedLines { get; }
Property Value
Type
System.Boolean

TotalExtent

Gets the total extent which is the total of all line sizes. Note: This propert only works if the DistanceCollection has been setup for pixel scrolling; otherwise it returns double.NaN.

Declaration
public virtual double TotalExtent { get; }
Property Value
Type Description
System.Double

The total extent or double.NaN.

Methods

add_DefaultLineSizeChanged(DefaultLineSizeChangedEventHandler)

Declaration
public void add_DefaultLineSizeChanged(DefaultLineSizeChangedEventHandler value)
Parameters
Type Name Description
DefaultLineSizeChangedEventHandler value

add_LineHiddenChanged(HiddenRangeChangedEventHandler)

Declaration
public void add_LineHiddenChanged(HiddenRangeChangedEventHandler value)
Parameters
Type Name Description
HiddenRangeChangedEventHandler value

add_LinesInserted(LinesInsertedEventHandler)

Declaration
public void add_LinesInserted(LinesInsertedEventHandler value)
Parameters
Type Name Description
LinesInsertedEventHandler value

add_LineSizeChanged(RangeChangedEventHandler)

Declaration
public void add_LineSizeChanged(RangeChangedEventHandler value)
Parameters
Type Name Description
RangeChangedEventHandler value

add_LinesRemoved(LinesRemovedEventHandler)

Declaration
public void add_LinesRemoved(LinesRemovedEventHandler value)
Parameters
Type Name Description
LinesRemovedEventHandler value

CreateMoveLines()

Creates the object which holds temporary state when moving lines.

Declaration
public IEditableLineSizeHost CreateMoveLines()
Returns
Type
IEditableLineSizeHost

DeferRefresh()

Declaration
public IDisposable DeferRefresh()
Returns
Type
System.IDisposable

Dispose()

Declaration
public void Dispose()

GetDefaultLineSize()

Returns the default line size.

Declaration
public double GetDefaultLineSize()
Returns
Type
System.Double

GetDistances(Int32)

Gets the nested distances if a line contains a nested lines collection; null otherwise.

Declaration
public IDistanceCounterCollection GetDistances(int line)
Parameters
Type Name Description
System.Int32 line

The line.
Returns
Type
IDistanceCounterCollection

GetFooterLineCount()

Gets the footer line count.

Declaration
public int GetFooterLineCount()
Returns
Type
System.Int32

GetHeaderLineCount()

Gets the header line count.

Declaration
public int GetHeaderLineCount()
Returns
Type
System.Int32

GetHidden(Int32, out Int32)

Gets the hidden state for a line.

Declaration
public bool GetHidden(int index, out int repeatValueCount)
Parameters
Type Name Description
System.Int32 index

The index.
System.Int32 repeatValueCount

The number of subsequent lines with same state.
Returns
Type
System.Boolean

GetLineCount()

Returns the line count.

Declaration
public int GetLineCount()
Returns
Type
System.Int32

GetNestedLines(Int32)

Gets the nested lines.

Declaration
public IEditableLineSizeHost GetNestedLines(int index)
Parameters
Type Name Description
System.Int32 index

The index.
Returns
Type
IEditableLineSizeHost

GetSize(Int32, out Int32)

Gets the size.

Declaration
public virtual double GetSize(int index, out int repeatValueCount)
Parameters
Type Name Description
System.Int32 index

The index.
System.Int32 repeatValueCount

The number of subsequent values with same size.
Returns
Type
System.Double

InitializeScrollAxis(ScrollAxisBase)

Initializes the scroll axis.

Declaration
public void InitializeScrollAxis(ScrollAxisBase scrollAxis)
Parameters
Type Name Description
ScrollAxisBase scrollAxis

The scroll axis.

InsertLines(Int32, Int32)

Inserts lines in the collection and raises the LinesInserted event.

Declaration
public void InsertLines(int insertAtLine, int count)
Parameters
Type Name Description
System.Int32 insertAtLine

The index of the first line to insert.
System.Int32 count

The count.

InsertLines(Int32, Int32, IEditableLineSizeHost)

Inserts lines in the collection and raises the LinesInserted event.

Declaration
public void InsertLines(int insertAtLine, int count, IEditableLineSizeHost movelines)
Parameters
Type Name Description
System.Int32 insertAtLine

The index of the first line to insert.
System.Int32 count

The count.
IEditableLineSizeHost movelines

A container with saved state from a preceeding RemoveLines(Int32, Int32) call when lines should be moved. When it is null empty lines with default size are inserted.

remove_DefaultLineSizeChanged(DefaultLineSizeChangedEventHandler)

Declaration
public void remove_DefaultLineSizeChanged(DefaultLineSizeChangedEventHandler value)
Parameters
Type Name Description
DefaultLineSizeChangedEventHandler value

remove_LineHiddenChanged(HiddenRangeChangedEventHandler)

Declaration
public void remove_LineHiddenChanged(HiddenRangeChangedEventHandler value)
Parameters
Type Name Description
HiddenRangeChangedEventHandler value

remove_LinesInserted(LinesInsertedEventHandler)

Declaration
public void remove_LinesInserted(LinesInsertedEventHandler value)
Parameters
Type Name Description
LinesInsertedEventHandler value

remove_LineSizeChanged(RangeChangedEventHandler)

Declaration
public void remove_LineSizeChanged(RangeChangedEventHandler value)
Parameters
Type Name Description
RangeChangedEventHandler value

remove_LinesRemoved(LinesRemovedEventHandler)

Declaration
public void remove_LinesRemoved(LinesRemovedEventHandler value)
Parameters
Type Name Description
LinesRemovedEventHandler value

RemoveLines(Int32, Int32)

Removes lines from the collection and raises the LinesRemoved event.

Declaration
public void RemoveLines(int removeAtLine, int count)
Parameters
Type Name Description
System.Int32 removeAtLine

The index of the first line to be removed.
System.Int32 count

The count.

RemoveLines(Int32, Int32, IEditableLineSizeHost)

Removes lines from the collection and raises the LinesRemoved event.

Declaration
public void RemoveLines(int removeAtLine, int count, IEditableLineSizeHost movelines)
Parameters
Type Name Description
System.Int32 removeAtLine

The index of the first line to be removed.
System.Int32 count

The count.
IEditableLineSizeHost movelines

A container to save state for a subsequent InsertLines(Int32, Int32) call when lines should be moved.

ResetHiddenState()

Declaration
public void ResetHiddenState()

ResetNestedLines()

Reset the line to become a normal (not nested) line with default line size.

Declaration
public void ResetNestedLines()

ResetNestedLines(Int32)

Reset the line to become a normal (not nested) line with default line size.

Declaration
public void ResetNestedLines(int index)
Parameters
Type Name Description
System.Int32 index

The index.

ResumeUpdates()

Declaration
public void ResumeUpdates()

ResumeUpdates(Boolean)

Declaration
public void ResumeUpdates(bool canreset)
Parameters
Type Name Description
System.Boolean canreset

SetHidden(Int32, Int32, Boolean)

Sets the hidden state for a range of lines.

Declaration
public void SetHidden(int from, int to, bool hide)
Parameters
Type Name Description
System.Int32 from

From.
System.Int32 to

To.
System.Boolean hide

if set to true hide the lines.

SetHiddenInterval(Int32, Int32, Boolean[])

Initialize the collection with a pattern of hidden lines.

Declaration
public void SetHiddenInterval(int start, int lineCount, bool[] values)
Parameters
Type Name Description
System.Int32 start

The index of the first line where the pattern should be started to be applied.
System.Int32 lineCount

The pattern is applied up to until the lineCount given. The last initialized line is at index lineCount-1.
System.Boolean[] values

The pattern that is applied repeatedly.

SetHiddenIntervalWithState(Int32, Int32, Boolean[])

Declaration
public void SetHiddenIntervalWithState(int start, int lineCount, bool[] values)
Parameters
Type Name Description
System.Int32 start
System.Int32 lineCount
System.Boolean[] values

SetHiddenState(Boolean[])

Set the hidden state all at once in one operation. Use this method if you want to change the hidden state of many rows at once since this will be much faster instead of individually setting rows hidden.

Declaration
public void SetHiddenState(bool[] values)
Parameters
Type Name Description
System.Boolean[] values

The new hidden state for rows.

SetNestedLines(Int32, IEditableLineSizeHost)

Sets the nested lines.

Declaration
public void SetNestedLines(int index, IEditableLineSizeHost nestedLines)
Parameters
Type Name Description
System.Int32 index

The index.
IEditableLineSizeHost nestedLines

The nested lines. If parameter is null the line will be converted to a normal (not nested) line with default line size.

SetRange(Int32, Int32, Double)

Sets the line size for a range.

Declaration
public void SetRange(int from, int to, double size)
Parameters
Type Name Description
System.Int32 from

From.
System.Int32 to

To.
System.Double size

The size.

SuspendUpdates()

Declaration
public void SuspendUpdates()

Events

DefaultLineSizeChanged

Occurs when the default line size changed.

Declaration
public event DefaultLineSizeChangedEventHandler DefaultLineSizeChanged
Event Type
Type
DefaultLineSizeChangedEventHandler

FooterLineCountChanged

Occurs when the footer line count was changed.

Declaration
public event EventHandler FooterLineCountChanged
Event Type
Type
System.EventHandler

HeaderLineCountChanged

Occurs when the header line count was changed.

Declaration
public event EventHandler HeaderLineCountChanged
Event Type
Type
System.EventHandler

LineCountChanged

Occurs when the line count was changed.

Declaration
public event EventHandler LineCountChanged
Event Type
Type
System.EventHandler

LineHiddenChanged

Occurs when a lines hidden state changed.

Declaration
public event HiddenRangeChangedEventHandler LineHiddenChanged
Event Type
Type
HiddenRangeChangedEventHandler

LinesInserted

Occurs when lines were inserted.

Declaration
public event LinesInsertedEventHandler LinesInserted
Event Type
Type
LinesInsertedEventHandler

LineSizeChanged

Occurs when a lines size was changed.

Declaration
public event RangeChangedEventHandler LineSizeChanged
Event Type
Type
RangeChangedEventHandler

LinesRemoved

Occurs when lines were removed.

Declaration
public event LinesRemovedEventHandler LinesRemoved
Event Type
Type
LinesRemovedEventHandler

Implements

System.IDisposable