Class

RadDropDownMenuElement

Declaration

public RadDropDownMenuElement()

Identifies the DropDownPosition dependency property.

Declaration

public static readonly RadProperty DropDownPositionProperty

Field Value

Gets the border primitive that provides the border rendering for the drop-down menu.

Declaration

public BorderPrimitive Border { get; }

Property Value

Gets a value indicating whether this element can have its own visual style defined.

Declaration

public override bool CanHaveOwnStyle { get; }

Property Value

Overrides RadElement.CanHaveOwnStyle

Gets the fill primitive that provides the background rendering for the drop-down menu.

Declaration

public FillPrimitive Fill { get; }

Property Value

Gets the header column element that manages the layout of header text and image elements.

Declaration

public ImageAndTextLayoutPanel HeaderColumn { get; }

Property Value

Gets the border primitive that provides the border rendering for the header column.

Declaration

public BorderPrimitive HeaderColumnBorder { get; }

Property Value

Gets the fill primitive that provides the background rendering for the header column.

Declaration

public FillPrimitive HeaderColumnFill { get; }

Property Value

Gets the image primitive that renders the header column image.

Declaration

public ImagePrimitive HeaderColumnImage { get; }

Property Value

Gets the text primitive that renders the header column text.

Declaration

public TextPrimitive HeaderColumnText { get; }

Property Value

Gets or sets the header image of the drop-down menu.

Declaration

public Image HeaderImage { get; set; }

Property Value

Gets or sets the header text of the drop-down menu.

Declaration

public string HeaderText { get; set; }

Property Value

Gets the specialized layout manager that handles the arrangement of menu items and columns.

Declaration

public RadDropDownMenuLayout Layout { get; }

Property Value

Gets the layout panel that contains and arranges the menu items.

Declaration

public RadElement LayoutPanel { get; }

Property Value

Gets the border primitive that provides the border rendering for the left column.

Declaration

public BorderPrimitive LeftColumnBorder { get; }

Property Value

Gets the element that represents the left column area of the drop-down menu, typically used for icons or checkmarks.

Declaration

public RadElement LeftColumnElement { get; }

Property Value

Gets the fill primitive that provides the background rendering for the left column.

Declaration

public FillPrimitive LeftColumnFill { get; }

Property Value

Gets an instance of the RadScrollViewer class that represents layout panel that provides scrolling functionality.

Declaration

public RadScrollViewer ScrollPanel { get; }

Property Value

Applies size constraints to the desired size based on popup control settings and screen boundaries.

Declaration

protected virtual SizeF ApplySizeConstraints(SizeF desiredSize)

Parameters

Returns

Arranges the child elements of the drop-down menu within the final layout rectangle.

Declaration

protected override SizeF ArrangeOverride(SizeF finalSize)

Parameters

Returns

Overrides RadElement.ArrangeOverride(SizeF)

Creates and initializes all child elements including fill, border, layout panels, and scroll viewer.

Declaration

protected override void CreateChildElements()

Overrides RadElement.CreateChildElements()

Creates the menu layout panel that manages the arrangement of menu items within the drop-down.

Declaration

protected virtual RadDropDownMenuLayout CreateMenuLayout()

Returns

Initializes the element fields and sets the default CSS class for styling.

Declaration

protected override void InitializeFields()

Overrides RadElement.InitializeFields()

Measures the child elements of the drop-down menu element and determines the size required for layout.

Declaration

protected override SizeF MeasureOverride(SizeF availableSize)

Parameters

Returns

Overrides RadElement.MeasureOverride(SizeF)

Called when a property value changes. Handles special logic for DropDownPositionProperty changes.

Declaration

protected override void OnPropertyChanged(RadPropertyChangedEventArgs e)

Parameters

Overrides RadElement.OnPropertyChanged(RadPropertyChangedEventArgs)