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C# ManipulationDeltaEventArgs.ReportBoundaryFeedback方法代码示例

本文整理汇总了C#中System.Windows.Input.ManipulationDeltaEventArgs.ReportBoundaryFeedback方法的典型用法代码示例。如果您正苦于以下问题:C# ManipulationDeltaEventArgs.ReportBoundaryFeedback方法的具体用法?C# ManipulationDeltaEventArgs.ReportBoundaryFeedback怎么用?C# ManipulationDeltaEventArgs.ReportBoundaryFeedback使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在System.Windows.Input.ManipulationDeltaEventArgs的用法示例。


在下文中一共展示了ManipulationDeltaEventArgs.ReportBoundaryFeedback方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: Window_ManipulationDelta

void Window_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{

    Rectangle rectToMove = e.OriginalSource as Rectangle;
    Vector overshoot;

    // When the element crosses the boundary of the window, check whether 
    // the manipulation is in inertia.  If it is, complete the manipulation.
    // Otherwise, report the boundary feedback.
    if (CalculateOvershoot(rectToMove, e.ManipulationContainer, out overshoot))
    {
        if (e.IsInertial)
        {
            e.Complete();
            e.Handled = true;
            return;
        }
        else
        {
            //Report that the element hit the boundary
            e.ReportBoundaryFeedback(new ManipulationDelta(overshoot, 0, new Vector(), new Vector()));
        }
    }
  
    // Move the element as usual.

    // Get the Rectangle and its RenderTransform matrix.
    Matrix rectsMatrix = ((MatrixTransform)rectToMove.RenderTransform).Matrix;

    // Rotate the Rectangle.
    rectsMatrix.RotateAt(e.DeltaManipulation.Rotation,
                         e.ManipulationOrigin.X,
                         e.ManipulationOrigin.Y);

    // Resize the Rectangle.  Keep it square 
    // so use only the X value of Scale.
    rectsMatrix.ScaleAt(e.DeltaManipulation.Scale.X,
                        e.DeltaManipulation.Scale.X,
                        e.ManipulationOrigin.X,
                        e.ManipulationOrigin.Y);

    // Move the Rectangle.
    rectsMatrix.Translate(e.DeltaManipulation.Translation.X,
                          e.DeltaManipulation.Translation.Y);

    // Apply the changes to the Rectangle.
    rectToMove.RenderTransform = new MatrixTransform(rectsMatrix);

    e.Handled = true;
}

private bool CalculateOvershoot(UIElement element, IInputElement container, out Vector overshoot)
{
    // Get axis aligned element bounds
    var elementBounds = element.RenderTransform.TransformBounds(
                  VisualTreeHelper.GetDrawing(element).Bounds);

    //double extraX = 0.0, extraY = 0.0;
    overshoot = new Vector();

    FrameworkElement parent = container as FrameworkElement;
    if (parent == null)
    {
        return false;
    }

    // Calculate overshoot.  
    if (elementBounds.Left < 0)
        overshoot.X = elementBounds.Left;
    else if (elementBounds.Right > parent.ActualWidth)
        overshoot.X = elementBounds.Right - parent.ActualWidth;

    if (elementBounds.Top < 0)
        overshoot.Y = elementBounds.Top;
    else if (elementBounds.Bottom > parent.ActualHeight)
        overshoot.Y = elementBounds.Bottom - parent.ActualHeight;

    // Return false if Overshoot is empty; otherwsie, return true.
    return !Vector.Equals(overshoot, new Vector());
}
开发者ID:.NET开发者,项目名称:System.Windows.Input,代码行数:80,代码来源:ManipulationDeltaEventArgs.ReportBoundaryFeedback


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