MapItem.MouseLeftButtonDown Event

Occurs when the left mouse button is pressed while the mouse pointer is over this element.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v21.2.dll

Declaration

public event MouseButtonEventHandler MouseLeftButtonDown

Event Data

The MouseLeftButtonDown event's data class is MouseButtonEventArgs. The following properties provide information specific to this event:

Property Description
ButtonState Gets the state of the button associated with the event.
ChangedButton Gets the button associated with the event.
ClickCount Gets the number of times the button was clicked.
Device Gets the input device that initiated this event. Inherited from InputEventArgs.
Handled Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
LeftButton Gets the current state of the left mouse button. Inherited from MouseEventArgs.
MiddleButton Gets the current state of the middle mouse button. Inherited from MouseEventArgs.
MouseDevice Gets the mouse device associated with this event. Inherited from MouseEventArgs.
OriginalSource Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RightButton Gets the current state of the right mouse button. Inherited from MouseEventArgs.
RoutedEvent Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Source Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.
StylusDevice Gets the stylus device associated with this event. Inherited from MouseEventArgs.
Timestamp Gets the time when this event occurred. Inherited from InputEventArgs.
XButton1 Gets the current state of the first extended mouse button. Inherited from MouseEventArgs.
XButton2 Gets the state of the second extended mouse button. Inherited from MouseEventArgs.

The event data class exposes the following methods:

Method Description
GetPosition(IInputElement) Returns the position of the mouse pointer relative to the specified element. Inherited from MouseEventArgs.
InvokeEventHandler(Delegate, Object) Invokes event handlers in a type-specific way, which can increase event system efficiency.
OnSetSource(Object) When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.

Remarks

To get the particular map item being currently processed, see the event’s sender parameter.

Example

This example demonstrates how to calculate a route between several waypoints and change the appearance of a route path using the Microsoft Bing Route web service. To accomplish this, do the following.

Note

If you run the application, and see a window with the following error message: ”The specified Bing Maps key is invalid. To create a developer account, refer to https://www.microsoft.com/en-us/maps/create-a-bing-maps-key”, refer to the following tutorial: How to: Get a Bing Maps Key.

View Example

Public Sub New()
    InitializeComponent()

    ' Create three waypoints and add them to a route waypoints list. 
    Dim waypoints As New List(Of RouteWaypoint)()
    waypoints.Add(New RouteWaypoint("New York", New GeoPoint(41.145556, -73.995)))
    waypoints.Add(New RouteWaypoint("Oklahoma", New GeoPoint(36.131389, -95.937222)))
    waypoints.Add(New RouteWaypoint("Las Vegas", New GeoPoint(36.175, -115.136389)))

    routeProvider.CalculateRoute(waypoints)
End Sub

Private Sub routeProvider_LayerItemsGenerating(ByVal sender As Object, ByVal args As LayerItemsGeneratingEventArgs)
    Dim letter As Char = "A"c

    For Each item As MapItem In args.Items
        Dim pushpin As MapPushpin = TryCast(item, MapPushpin)
        If pushpin IsNot Nothing Then
            pushpin.Text = letter.ToString()
            letter = ChrW(AscW(letter) + 1)
        End If
    Next item
End Sub
See Also