In This Topic
Initializes a new
C1DragHelper.
Syntax
'Declaration
Public Function New( _
ByVal As UIElement, _
Optional ByVal As C1DragHelperMode, _
Optional ByVal As Double, _
Optional ByVal As Boolean, _
Optional ByVal handledEventsToo As Boolean, _
Optional ByVal As Boolean, _
Optional ByVal As Boolean _
)
'Usage
Dim element As UIElement
Dim mode As C1DragHelperMode
Dim initialThreshold As Double
Dim captureElementOnPointerPressed As Boolean
Dim handledEventsToo As Boolean
Dim useManipulationEvents As Boolean
Dim useRightButton As Boolean
Dim instance As New C1DragHelper(element, mode, initialThreshold, captureElementOnPointerPressed, handledEventsToo, useManipulationEvents, useRightButton)
Parameters
- element
- An System.Windows.UIElement on which the drag gesture will be listened.
- mode
- Indicates the sort of drag to be listened. Combine inertia flag with other flags so that DragDelta events are raised after the manipulation finish. i.e. C1DragHelperMode.FreeDrag | C1DragHelperMode.Inertia
- initialThreshold
- Specifies the number of pixels the gesture will have to pass in order to start. if 0 is set the gesture will start on pointer down, and captureElementOnPointerPressed will be true despite the specified parameter, otherwise the gesture will start on mouse move, default value is 1
- captureElementOnPointerPressed
- Indicates whether the element will be captured in pointer pressed event (MouseLeftButtonDown in SL and WPF and PointerPressed in WinRT) or in the first pointer move event (MouseMove in SL and WPF and PointerMoved in WinRT). If initialThreshold is 0 this parameter will be ignored.Capturing the element on mouse down will cause Click, DoubleClick and MouseLeftButtonUp events not to be fired in sub-elements (nested elements in the visual tree), whereas capturing the element on the first mouse move can make it difficult for final users to drag small elements quickly.
- handledEventsToo
- Indicates whether drag gestures will be listened despite mouse events were already handled. (It only applies to mouse gestures)
- useManipulationEvents
- When set to true it uses Manipulation events to listen to the gesture, otherwise itwill use Pointer events.
- useRightButton
- if set to
true
it will listen to mouse right button down/up events instead of left button events(In WinRT it only applies if useManipulationEvents is set to false).
See Also