Class GridDropDownCellImp

Implements drop-down cell functionality.

Inheritance

System.Object

GridDropDownCellImp

Implements

IGridDropDownCellImp

System.IDisposable

IQueryFocusInside

IPopupParent

IPopupItem

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Syncfusion.Windows.Forms.Grid

Assembly: Syncfusion.Grid.Windows.dll

Syntax

public class GridDropDownCellImp : IGridDropDownCellImp, IDisposable, IQueryFocusInside, IPopupParent, IPopupItem

Constructors

GridDropDownCellImp(GridCellRendererBase)

Initializes a new GridDropDownCellImp object.

Declaration

public GridDropDownCellImp(GridCellRendererBase renderer)

Parameters

Type	Name	Description
GridCellRendererBase	renderer	The cell renderer that you want to enable for drop-down functionality.

Properties

CurrentCell

Gets a reference to GridCurrentCell implementation of the GridControlBase this cell renderer is associated with.

Declaration

public GridCurrentCell CurrentCell { get; }

Property Value

Type
GridCurrentCell

DropDownButton

Gets or sets the drop-down button.

Declaration

public GridCellButton DropDownButton { get; set; }

Property Value

Type
GridCellButton

DropDownContainer

Gets DropDownContainer. For convenience only. Same as PopupControlContainer.

Declaration

public IGridDropDownContainer DropDownContainer { get; }

Property Value

Type
IGridDropDownContainer

EditPart

Gets the text box that is displayed in the user input field for a combo box.

Declaration

public Control EditPart { get; }

Property Value

Type
System.Windows.Forms.Control

Grid

Gets a reference to the parent grid.

Declaration

public GridControlBase Grid { get; }

Property Value

Type
GridControlBase

IgnoreDoubleClickTicks

Gets or sets the Environment.TickCount value until a second click should be considered a double click.

Declaration

public int IgnoreDoubleClickTicks { get; set; }

Property Value

Type
System.Int32

IgnoreFocus

Gets or sets a value indicating whether grid focus notification should be temporarily ignored.

Declaration

public bool IgnoreFocus { get; set; }

Property Value

Type
System.Boolean

InitFocusEditPart

Gets or sets a value indicating whether the focus should remain with the grid or active text box when dropped-down. True if focus should remain with grid; False if drop-down should get focus.

Declaration

public bool InitFocusEditPart { get; set; }

Property Value

Type
System.Boolean

IsDroppedDown

Gets a value indicating whether the drop-down is currently dropped-down and visible.

Declaration

public bool IsDroppedDown { get; }

Property Value

Type
System.Boolean

PopupControlContainer

Gets the container where you can insert child controls to be displayed as drop-down part for your cell.

Declaration

public IGridDropDownContainer PopupControlContainer { get; }

Property Value

Type
IGridDropDownContainer

Methods

ChildClosing(IPopupChild, PopupCloseType)

Called to indicate that the popup child was closed in the specified mode.

Declaration

public virtual void ChildClosing(IPopupChild childUI, PopupCloseType popupCloseType)

Parameters

Type	Name	Description
IPopupChild	childUI	The child that was closed.
PopupCloseType	popupCloseType	A PopupCloseType value.

See Also

IPopupItem

CreateDropDownContainer()

Creates a GridDropDownContainer and associates it with the cell's parent grid.

Declaration

public virtual IGridDropDownContainer CreateDropDownContainer()

Returns

Type	Description
IGridDropDownContainer	The container where you can insert child controls to be displayed as drop-down part for your cell.

Dispose()

Unwires any events subscribed from GridDropDownContainer.

Declaration

public void Dispose()

DropDownContainerCloseDropDown(Object, PopupClosedEventArgs)

Called to indicate that the popup child was closed.

Declaration

public virtual void DropDownContainerCloseDropDown(object sender, PopupClosedEventArgs e)

Parameters

Type	Name	Description
System.Object	sender	The child that was closed.
PopupClosedEventArgs	e	The event data with a PopupCloseType value.

DropDownContainerShowedDropDown(Object, EventArgs)

Occurs after the popup has been dropped-down and made visible.

Declaration

public virtual void DropDownContainerShowedDropDown(object sender, EventArgs e)

Parameters

Type	Name	Description
System.Object	sender	The source of the event.
System.EventArgs	e	An System.EventARgsthat contains the event data.

DropDownContainerShowingDropDown(Object, CancelEventArgs)

Occurs when the drop-down container is about to be shown.

Declaration

public virtual void DropDownContainerShowingDropDown(object sender, CancelEventArgs e)

Parameters

Type	Name	Description
System.Object	sender	The source of the event.
System.ComponentModel.CancelEventArgs	e	An System.EventARgsthat contains the event data.

EnsureDropDownContainer()

Ensures the container is valid and initialized.

Declaration

public void EnsureDropDownContainer()

FixTopMostWindow()

Ensures that the drop-down part is the top-most window.

Declaration

public void FixTopMostWindow()

InitializeDropDownContainer()

Called to initialize contents of the drop-down container for the first time.

Declaration

public virtual void InitializeDropDownContainer()

IsRelatedControl(Control, Boolean)

Called to find out whether a specified control is part of the popup hierarchy.

Declaration

public virtual bool IsRelatedControl(Control control, bool askPopupParent)

Parameters

Type	Name	Description
System.Windows.Forms.Control	control	A Control instance.
System.Boolean	askPopupParent	True indicates this query should be passed to the IPopupParent, if any; False indicates you should not query the popup parent.

Returns

Type	Description
System.Boolean	True if the control is part of the popup hierarchy; False if not.

See Also

IPopupItem

NotifyShowedDropDown()

Raises the OnCurrentCellShowedDropDown(EventArgs) for the parent grid.

Declaration

public void NotifyShowedDropDown()

NotifyShowingDropDown(ref Size)

Raises the OnCurrentCellShowingDropDown(GridCurrentCellShowingDropDownEventArgs) for the parent grid.

Declaration

public bool NotifyShowingDropDown(ref Size size)

Parameters

Type	Name	Description
System.Drawing.Size	size	The suggested size of the drop-down

Returns

Type	Description
System.Boolean	True if drop-down should be shown; False if operation should be canceled.

OnButtonClicked(Int32, Int32, Int32)

This method is called when the user clicks a cell button inside cell.

Declaration

public virtual void OnButtonClicked(int rowIndex, int colIndex, int button)

Parameters

Type	Name	Description
System.Int32	rowIndex	The row index.
System.Int32	colIndex	The column index.
System.Int32	button	The button

Remarks

In your overridden version of this method, you can activate the current cell for the given row and column index and then drop-down a list.

OnCloseDropDown(PopupCloseType)

This is called from GridCurrentCell.CloseDropDown.

Declaration

public virtual void OnCloseDropDown(PopupCloseType reason)

Parameters

Type	Name	Description
PopupCloseType	reason

Remarks

If your renderer supports dropped-down state, the drop-down window should be closed at this time.

OnHasFocusControlChanged()

Override this method if your cell renderer supports in-place editing and you want to do any custom initialization at this point before cell gets redrawn.

Declaration

public virtual void OnHasFocusControlChanged()

OnInitialize(Int32, Int32)

This method gets called from the cell renderer's Initialize method. Override this method if you need to any initialization for the current cell.

Declaration

public virtual void OnInitialize(int rowIndex, int colIndex)

Parameters

Type	Name	Description
System.Int32	rowIndex	The row index.
System.Int32	colIndex	The column index.

OnKeyDown(KeyEventArgs)

Invoked when user pressed key down. (similar to Control.OnKeyDown)

Declaration

public virtual void OnKeyDown(KeyEventArgs e)

Parameters

Type	Name	Description
System.Windows.Forms.KeyEventArgs	e	An System.EventARgsthat contains the event data.

OnShowDropDown()

This is called from GridCurrentCell.ShowDropDown after BeginEdit has been called.

Declaration

public virtual void OnShowDropDown()

Remarks

If your renderer supports dropped-down state, the drop-down window should be made visible at this time.

QueryFocusInside()

Determines if this control contains focus. Override this method if you want to show drop-down windows and indicate the control has not lost focus when the drop-down is shown.

Declaration

public bool QueryFocusInside()

Returns

Type	Description
System.Boolean	True if the control or any child control has focus; False otherwise.

Explicit Interface Implementations

IPopupItem.GetPopupParentControl()

Declaration

Control IPopupItem.GetPopupParentControl()

Returns

Type
System.Windows.Forms.Control

IPopupParent.GetBorderOverlapCue(PopupRelativeAlignment)

Declaration

Point[] IPopupParent.GetBorderOverlapCue(PopupRelativeAlignment relativeAlignment)

Parameters

Type	Name	Description
PopupRelativeAlignment	relativeAlignment

Returns

Type
System.Drawing.Point[]

IPopupParent.GetLocationForPopupAlignment(PopupRelativeAlignment, out PopupRelativeAlignment)

Returns the location for popup, given the preferred relative alignments.

Declaration

Point IPopupParent.GetLocationForPopupAlignment(PopupRelativeAlignment prevAlign, out PopupRelativeAlignment newAlign)

Parameters

Type	Name	Description
PopupRelativeAlignment	prevAlign	The previous alignment.
PopupRelativeAlignment	newAlign	The new alignment designated for the returned location.

Returns

Type	Description
System.Drawing.Point	An ideal location for popup designated by one of the PopupRelativeAlignment values in newAlignment. Or returns a Point.Empty and set newAlignment to Syncfusion.Windows.Forms.PopupRelativeAlignment.Default if you do not intend to provide multiple preferred locations.

IPopupParent.IsRightToLeft

Declaration

bool IPopupParent.IsRightToLeft { get; }

Returns

Type
System.Boolean

Implements

IGridDropDownCellImp

System.IDisposable

IQueryFocusInside

IPopupParent

IPopupItem