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

Implements

IPaddedEditableLineSizeHost

IEditableLineSizeHost

ILineSizeHost

IDistancesHost

INestedDistancesHost

System.IDisposable

Namespace: Syncfusion.GridCommon.ScrollAxis

Assembly: Syncfusion.GridCommon.Portable.dll

Syntax

public class LineSizeCollection : Object, IPaddedEditableLineSizeHost, IEditableLineSizeHost, ILineSizeHost, IDistancesHost, INestedDistancesHost, IDisposable

Constructors

LineSizeCollection()

Initializes a new instance of the LineSizeCollection class.

Declaration

public LineSizeCollection()

Fields

Empty

Returns an empty collection.

Declaration

public static readonly LineSizeCollection Empty

Field Value

Type	Description
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 the distances collection which is used internally for mapping from a point position to a line index and vice versa.

Declaration

public IDistanceCounterCollection Distances { get; }

Property Value

Type	Description
IDistanceCounterCollection	The distances collection which is used internally for mapping from a point position to a line index and vice versa.

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	index value

Property Value

Type	Description
System.Double	The line size at the specified index.

LineCount

Gets or sets the line count.

Declaration

public int LineCount { get; set; }

Property Value

Type	Description
System.Int32	The line count.

PaddingDistance

Gets or sets the padding distance for the line.

Declaration

public double PaddingDistance { get; set; }

Property Value

Type	Description
System.Double	The padding distance for the line.

SupportsInsertRemove

Gets a value indicating whether the host supports inserting and removing lines or not.

Declaration

public bool SupportsInsertRemove { get; }

Property Value

Type	Description
System.Boolean	The boolean value indicating whether the host supports inserting and removing lines.

SupportsNestedLines

Gets a value indicating whether the host supports nesting.

Declaration

public bool SupportsNestedLines { get; }

Property Value

Type	Description
System.Boolean	A boolean value indicating whether the host supports nesting.

TotalExtent

Gets the total extent which is the total of all line sizes. Note: This property only works if the DistanceCounterCollection has been setup for pixel scrolling, otherwise it returns System.Double.NaN.

Declaration

public virtual double TotalExtent { get; }

Property Value

Type	Description
System.Double	The total extent which is the total of all line sizes or System.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	Description
IEditableLineSizeHost	The object which holds temporary state when moving lines.

DeferRefresh()

Enter the defer cycle so that all data operations in view is performed and update once.

Declaration

public IDisposable DeferRefresh()

Returns

Type	Description
System.IDisposable	The disposable object to release the allocated resources.

Dispose()

Releases the managed and unmanaged resources.

Declaration

public void Dispose()

Dispose(Boolean)

Releases the unmanaged resources used by the component and optionally releases the managed resources.

Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing	if true - release both managed and unmanaged resources; if false - release only unmanaged resources.

GetDefaultLineSize()

Returns the default line size.

Declaration

public double GetDefaultLineSize()

Returns

Type	Description
System.Double	The default line size.

GetDistances(Int32)

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

Declaration

public IDistanceCounterCollection GetDistances(int line)

Parameters

Type	Name	Description
System.Int32	line	The line at which the distances is to be obtained.

Returns

Type	Description
IDistanceCounterCollection	The nested distances, if a line contains a nested lines collection, otherwise null.

GetFooterLineCount()

Gets the footer line count.

Declaration

public int GetFooterLineCount()

Returns

Type	Description
System.Int32	The footer line count.

GetHeaderLineCount()

Gets the header line count.

Declaration

public int GetHeaderLineCount()

Returns

Type	Description
System.Int32	The header line count.

GetHidden(Int32, out Int32)

Gets the boolean value indicating the hidden state for the line with given index.

Declaration

public bool GetHidden(int index, out int repeatValueCount)

Parameters

Type	Name	Description
System.Int32	index	The index of the line for which the hidden state is to be obtained.
System.Int32	repeatValueCount	The number of subsequent lines with same state.

Returns

Type	Description
System.Boolean	The boolean value indicating the hidden state for a line.

GetLineCount()

Returns the line count.

Declaration

public int GetLineCount()

Returns

Type	Description
System.Int32	The line count.

GetNestedLines(Int32)

Gets the nested lines at the given index.

Declaration

public IEditableLineSizeHost GetNestedLines(int index)

Parameters

Type	Name	Description
System.Int32	index	The index at which the nested lines is to be obtained.

Returns

Type	Description
IEditableLineSizeHost	The IEditableLineSizeHost representing the nested lines.

GetSize(Int32, out Int32)

Gets the size of the line at the given index.

Declaration

public virtual double GetSize(int index, out int repeatValueCount)

Parameters

Type	Name	Description
System.Int32	index	The index of the line for which the size is to be obtained.
System.Int32	repeatValueCount	The number of subsequent values with same size.

Returns

Type	Description
System.Double	The size of the line at the given index.

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 of the lines to be inserted.

InsertLines(Int32, Int32, IEditableLineSizeHost)

Insert the given number of lines at the given index.

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 of the lines to be inserted.
IEditableLineSizeHost	movelines	A container with saved state from a preceding InsertLines(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 of the lines to be removed.

RemoveLines(Int32, Int32, IEditableLineSizeHost)

Removes a number of lines at the given index.

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 of the lines to be removed.
IEditableLineSizeHost	movelines	A container to save state for a subsequent RemoveLines(Int32, Int32) call when lines should be moved.

ResetHiddenState()

Resets the hidden state of the line.

Declaration

public void ResetHiddenState()

ResetLines()

Reset the lines with default line size.

Declaration

public void ResetLines()

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 of the line to be reset.

ResumeUpdates()

Resumes the update in the view.

Declaration

public void ResumeUpdates()

SetHidden(Int32, Int32, Boolean)

Sets the hidden state for the given range of lines.

Declaration

public void SetHidden(int from, int to, bool hide)

Parameters

Type	Name	Description
System.Int32	from	The start index of the line for which the hidden state to be set.
System.Int32	to	The end index of the line for which the hidden state to be set.
System.Boolean	hide	A boolean value indicating whether to hide the lines. 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[])

Initialize the collection with a pattern of hidden lines with state.

Declaration

public void SetHiddenIntervalWithState(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.

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 at the given index.

Declaration

public void SetNestedLines(int index, IEditableLineSizeHost nestedLines)

Parameters

Type	Name	Description
System.Int32	index	The index at which the nested lines is to be added.
IEditableLineSizeHost	nestedLines	The nested lines to be added. 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 the range of lines.

Declaration

public void SetRange(int from, int to, double size)

Parameters

Type	Name	Description
System.Int32	from	The start index of the line for which the line size is to be set.
System.Int32	to	The end index of the line for which the line size is to be set.
System.Double	size	The line size to be set to the given range of lines.

SuspendUpdates()

Suspends the updates in the view.

Declaration

public void SuspendUpdates()

Events

DefaultLineSizeChanged

Occurs when the default line size changed.

Declaration

public event DefaultLineSizeChangedEventHandler DefaultLineSizeChanged

Event Type

Type	Description
DefaultLineSizeChangedEventHandler

FooterLineCountChanged

Occurs when the footer line count was changed.

Declaration

public event EventHandler FooterLineCountChanged

Event Type

Type	Description
System.EventHandler

HeaderLineCountChanged

Occurs when the header line count was changed.

Declaration

public event EventHandler HeaderLineCountChanged

Event Type

Type	Description
System.EventHandler

LineCountChanged

Occurs when the line count was changed.

Declaration

public event EventHandler LineCountChanged

Event Type

Type	Description
System.EventHandler

LineHiddenChanged

Occurs when a lines hidden state changed.

Declaration

public event HiddenRangeChangedEventHandler LineHiddenChanged

Event Type

Type	Description
HiddenRangeChangedEventHandler

LinesInserted

Occurs when lines were inserted.

Declaration

public event LinesInsertedEventHandler LinesInserted

Event Type

Type	Description
LinesInsertedEventHandler

LineSizeChanged

Occurs when a lines size was changed.

Declaration

public event RangeChangedEventHandler LineSizeChanged

Event Type

Type	Description
RangeChangedEventHandler

LinesRemoved

Occurs when lines were removed.

Declaration

public event LinesRemovedEventHandler LinesRemoved

Event Type

Type	Description
LinesRemovedEventHandler

Implements

IPaddedEditableLineSizeHost

IEditableLineSizeHost

ILineSizeHost

IDistancesHost

INestedDistancesHost

System.IDisposable