Class Picker

Base class for all controls that have popup functionality.

Inheritance
System.Object
DependencyObject
UIElement
FrameworkElement
Control
Picker
TimePicker
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: System.Windows.Controls
Assembly: OpenSilver.Controls.Input.Toolkit.dll
Syntax
[TemplatePart(Name = "Popup", Type = typeof(Popup))]
[TemplatePart(Name = "DropDownToggle", Type = typeof(ToggleButton))]
public abstract class Picker : Control, IControl, IFrameworkElement, IUIElement, IDependencyObject

Constructors

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Picker()

Initializes a new instance of the Picker class.

Declaration
protected Picker()

Fields

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IsDropDownOpenProperty

Identifies the IsDropDownOpen dependency property.

Declaration
public static readonly DependencyProperty IsDropDownOpenProperty
Field Value
Type Description
DependencyProperty
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MaxDropDownHeightProperty

Identifies the MaxDropDownHeight dependency property.

Declaration
public static readonly DependencyProperty MaxDropDownHeightProperty
Field Value
Type Description
DependencyProperty
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PopupButtonModeProperty

Identifies the PopupButtonMode dependency property.

Declaration
public static readonly DependencyProperty PopupButtonModeProperty
Field Value
Type Description
DependencyProperty

Properties

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IsDropDownOpen

Gets or sets a value indicating whether the drop-down portion of the control is open.

Declaration
public bool IsDropDownOpen { get; set; }
Property Value
Type Description
System.Boolean
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MaxDropDownHeight

Gets or sets the maximum height of the drop-down portion of the Picker control.

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

Gets or sets the button event that causes the popup portion of the Picker control to open.

Declaration
public ClickMode PopupButtonMode { get; set; }
Property Value
Type Description
ClickMode
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PopupChild

Gets the element shown in the drop down portion of the Picker control.

Declaration
public FrameworkElement PopupChild { get; }
Property Value
Type Description
FrameworkElement

Methods

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GetSelectedValue()

Gets the selected value represented in the control.

Declaration
public abstract object GetSelectedValue()
Returns
Type Description
System.Object

The value that is picked.
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OnApplyTemplate()

Builds the visual tree for the Picker control when a new template is applied.

Declaration
public override void OnApplyTemplate()
Overrides
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OnDropDownClosed(RoutedPropertyChangedEventArgs<Boolean>)

Raises the DropDownClosed event.

Declaration
protected virtual void OnDropDownClosed(RoutedPropertyChangedEventArgs<bool> e)
Parameters
Type Name Description
RoutedPropertyChangedEventArgs<System.Boolean> e

The event data.
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OnDropDownClosing(RoutedPropertyChangingEventArgs<Boolean>)

Raises the DropDownClosing event.

Declaration
protected virtual void OnDropDownClosing(RoutedPropertyChangingEventArgs<bool> e)
Parameters
Type Name Description
RoutedPropertyChangingEventArgs<System.Boolean> e

Provides any observers the opportunity to cancel the operation and halt closing the drop down.
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OnDropDownOpened(RoutedPropertyChangedEventArgs<Boolean>)

Raises the DropDownOpened event.

Declaration
protected virtual void OnDropDownOpened(RoutedPropertyChangedEventArgs<bool> e)
Parameters
Type Name Description
RoutedPropertyChangedEventArgs<System.Boolean> e

The event data.
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OnDropDownOpening(RoutedPropertyChangingEventArgs<Boolean>)

Raises the DropDownOpening event.

Declaration
protected virtual void OnDropDownOpening(RoutedPropertyChangingEventArgs<bool> e)
Parameters
Type Name Description
RoutedPropertyChangingEventArgs<System.Boolean> e

Provides any observers the opportunity to cancel the operation and halt opening the drop down.
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OnGotFocus(RoutedEventArgs)

Provides handling for the GotFocus event.

Declaration
protected override void OnGotFocus(RoutedEventArgs e)
Parameters
Type Name Description
RoutedEventArgs e

The data for the event.
Overrides
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OnLostFocus(RoutedEventArgs)

Provides handling for the LostFocus event.

Declaration
protected override void OnLostFocus(RoutedEventArgs e)
Parameters
Type Name Description
RoutedEventArgs e

The event data.
Overrides
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OnMouseEnter(MouseEventArgs)

Provides handling for the MouseEnter event.

Declaration
protected override void OnMouseEnter(MouseEventArgs e)
Parameters
Type Name Description
MouseEventArgs e

The data for the event.
Overrides
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OnMouseLeave(MouseEventArgs)

Provides handling for the MouseLeave event.

Declaration
protected override void OnMouseLeave(MouseEventArgs e)
Parameters
Type Name Description
MouseEventArgs e

The data for the event.
Overrides
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OnMouseLeftButtonDown(MouseButtonEventArgs)

Called before the MouseLeftButtonDown event occurs.

Declaration
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
Parameters
Type Name Description
MouseButtonEventArgs e

The data for the event.
Overrides
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OnMouseLeftButtonUp(MouseButtonEventArgs)

Called before the MouseLeftButtonUp event occurs.

Declaration
protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
Parameters
Type Name Description
MouseButtonEventArgs e

The data for the event.
Overrides

Events

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DropDownClosed

Occurs when the IsDropDownOpen property was changed from true to false and the drop-down is open.

Declaration
public event RoutedPropertyChangedEventHandler<bool> DropDownClosed
Event Type
Type Description
RoutedPropertyChangedEventHandler<System.Boolean>
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DropDownClosing

Occurs when the IsDropDownOpen property is changing from true to false.

Declaration
public event RoutedPropertyChangingEventHandler<bool> DropDownClosing
Event Type
Type Description
RoutedPropertyChangingEventHandler<System.Boolean>
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DropDownOpened

Occurs when the value of the IsDropDownOpen property has changed from false to true and the drop-down is open.

Declaration
public event RoutedPropertyChangedEventHandler<bool> DropDownOpened
Event Type
Type Description
RoutedPropertyChangedEventHandler<System.Boolean>
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DropDownOpening

Occurs when the value of the IsDropDownOpen property is changing from false to true.

Declaration
public event RoutedPropertyChangingEventHandler<bool> DropDownOpening
Event Type
Type Description
RoutedPropertyChangingEventHandler<System.Boolean>

Extension Methods