protected override void OnManipulationDelta(ManipulationDeltaEventArgs args)
{
if (!manipulationDeltaInProgress)
{
IsActive = true;
if (!tapInertiaInProgess)
{
SelectedIndex = -1;
}
}
manipulationDeltaInProgress = true;
// This is the fake inertia from a tap
if (tapInertiaInProgess)
{
VerticalOffset -= args.DeltaManipulation.Translation.Y;
}
// All other direct manipulation and inertia
else
{
// For non-wrappable panel, check for end of the line
if (!isWrappableStackPanel)
{
double newVerticalOffset = VerticalOffset - inertiaDirection * args.DeltaManipulation.Translation.Y;
if (FractionalCenteredIndexFromVerticalOffset(newVerticalOffset, false) < 0)
{
double verticalOffsetIncrement = VerticalOffset - VerticalOffsetFromCenteredIndex(0);
double verticalOffsetExcess = args.DeltaManipulation.Translation.Y - verticalOffsetIncrement;
VerticalOffset -= verticalOffsetIncrement;
SelectedIndex = 0;
args.ReportBoundaryFeedback(new ManipulationDelta(new Vector(0, verticalOffsetExcess), 0, new Vector(), new Vector()));
args.Complete();
}
else if (FractionalCenteredIndexFromVerticalOffset(newVerticalOffset, false) > Items.Count - 1)
{
double verticalOffsetIncrement = VerticalOffsetFromCenteredIndex(Items.Count - 1) - VerticalOffset;
double verticalOffsetExcess = args.DeltaManipulation.Translation.Y - verticalOffsetIncrement;
VerticalOffset += verticalOffsetIncrement;
SelectedIndex = Items.Count - 1;
args.ReportBoundaryFeedback(new ManipulationDelta(new Vector(0, verticalOffsetExcess), 0, new Vector(), new Vector()));
args.Complete();
}
}
// Here's where scrolling might reverse itself
if (args.IsInertial && inertiaToUnknownIndex && !reverseInertiaChecked)
{
CheckForBackupManeuver(VerticalOffset, args.DeltaManipulation.Translation.Y, args.Velocities.LinearVelocity.Y);
}
// This is the normal direct manipulation and inertia
VerticalOffset -= inertiaDirection * args.DeltaManipulation.Translation.Y;
}
base.OnManipulationDelta(args);
}
void image_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
var element = e.Source as FrameworkElement;
if (element != null)
{
var deltaManipulation = e.DeltaManipulation;
var matrix = ((MatrixTransform)element.RenderTransform).Matrix;
System.Windows.Point center = new System.Windows.Point(element.ActualWidth / 2, element.ActualHeight / 2);
center = matrix.Transform(center);
matrix.ScaleAt(deltaManipulation.Scale.X, deltaManipulation.Scale.Y, center.X, center.Y);
matrix.RotateAt(e.DeltaManipulation.Rotation, center.X, center.Y);
matrix.Translate(e.DeltaManipulation.Translation.X, e.DeltaManipulation.Translation.Y);
((MatrixTransform)element.RenderTransform).Matrix = matrix;
e.Handled = true;
if (e.IsInertial)
{
Rect containingRect = new Rect(((FrameworkElement)e.ManipulationContainer).RenderSize);
Rect shapeBounds = element.RenderTransform.TransformBounds(new Rect(element.RenderSize));
if (e.IsInertial && !containingRect.Contains(shapeBounds))
{
e.ReportBoundaryFeedback(e.DeltaManipulation);
e.Complete();
}
}
}
}
private void canvas_PadControl_wheel_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
var element = e.Source as FrameworkElement;
if (element != null)
{
if (e.IsInertial)
{
Rect containingRect = new Rect(((FrameworkElement)e.ManipulationContainer).RenderSize);
Rect shapeBounds = element.RenderTransform.TransformBounds(new Rect(element.RenderSize));
if (e.IsInertial && !containingRect.Contains(shapeBounds))
{
e.ReportBoundaryFeedback(e.DeltaManipulation);
e.Complete();
}
}
try
{
Matrix matrix = element.RenderTransform.Value;
Point center = new Point(element.ActualWidth / 2, element.ActualHeight / 2);
center = matrix.Transform(center); //设置中心点
// 处理旋转
matrix.RotateAt(e.DeltaManipulation.Rotation / 5, center.X, center.Y);
element.RenderTransform = new MatrixTransform(matrix);
e.Handled = true;
label8.Content = e.DeltaManipulation.Rotation / 5;
}
catch (Exception ei)
{
MessageBox.Show(ei.ToString());
}
}
}
//</SnippetManipulationPivot>
//<SnippetReportBoundaryFeedback>
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 void AssociatedObject_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
//this just gets the source.
// I cast it to FE because I wanted to use ActualWidth for Center. You could try RenderSize as alternate
var element = e.Source as FrameworkElement;
if (element != null)
{
//e.DeltaManipulation has the changes
// Scale is a delta multiplier; 1.0 is last size, (so 1.1 == scale 10%, 0.8 = shrink 20%)
// Rotate = Rotation, in degrees
// Pan = Translation, == Translate offset, in Device Independent Pixels
var deltaManipulation = e.DeltaManipulation;
var matrix = ((MatrixTransform)element.RenderTransform).Matrix;
// find the old center; arguaby this could be cached
Point center = new Point(element.ActualWidth / 2, element.ActualHeight / 2);
// transform it to take into account transforms from previous manipulations
center = matrix.Transform(center);
//this will be a Zoom.
matrix.ScaleAt(deltaManipulation.Scale.X, deltaManipulation.Scale.Y, center.X, center.Y);
// Rotation
matrix.RotateAt(e.DeltaManipulation.Rotation, center.X, center.Y);
//Translation (pan)
matrix.Translate(e.DeltaManipulation.Translation.X, e.DeltaManipulation.Translation.Y);
((MatrixTransform)element.RenderTransform).Matrix = matrix;
e.Handled = true;
if (e.IsInertial)
{
Rect containingRect = new Rect(0, 0, System.Windows.SystemParameters.PrimaryScreenWidth, System.Windows.SystemParameters.PrimaryScreenHeight);
Rect shapeBounds = element.RenderTransform.TransformBounds(new Rect(element.RenderSize));
//Console.WriteLine(center.X.ToString() + " " + center.Y.ToString() + " " + containingRect.Contains(center).ToString());
// Check if the element is completely in the window.
// If it is not and intertia is occurring, stop the manipulation.
if (e.IsInertial && !containingRect.Contains(shapeBounds))
{
e.ReportBoundaryFeedback(e.DeltaManipulation);
}
}
}
}
public void ManipulationDelta(DrawingCanvas drawingCanvas, ManipulationDeltaEventArgs e)
{
// Get the Rectangle and its RenderTransform matrix.
Rectangle rectToMove = e.OriginalSource as Rectangle;
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);
Rect containingRect =
new Rect(((FrameworkElement)e.ManipulationContainer).RenderSize);
Rect shapeBounds =
rectToMove.RenderTransform.TransformBounds(
new Rect(rectToMove.RenderSize));
// Check if the rectangle is completely in the window.
// If it is not and intertia is occuring, stop the manipulation.
if (e.IsInertial && !containingRect.Contains(shapeBounds))
{
e.Complete();
e.ReportBoundaryFeedback(e.DeltaManipulation);
}
e.Handled = true;
System.Diagnostics.Debug.WriteLine("ManipulationDelta");
}
private void image_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
//this just gets the source.
// I cast it to FE because I wanted to use ActualWidth for Center. You could try RenderSize as alternate
var element = e.Source as FrameworkElement;
if (element != null)
{
//e.DeltaManipulation has the changes
// Scale is a delta multiplier; 1.0 is last size, (so 1.1 == scale 10%, 0.8 = shrink 20%)
// Rotate = Rotation, in degrees
// Pan = Translation, == Translate offset, in Device Independent Pixels
var deltaManipulation = e.DeltaManipulation;
var matrix = ((MatrixTransform)element.RenderTransform).Matrix;
Point center = new Point(e.ManipulationOrigin.X, e.ManipulationOrigin.Y);
// this will be a Zoom.
if (!IsScaleDisabled) // scale is enabled
{
if (element as TouchImage != null)
{
if ((element as TouchImage).IsScaleDisable)
{
return; // scale olayı bu canvas için kapalı ise
}
}
matrix.ScaleAt(deltaManipulation.Scale.X, deltaManipulation.Scale.Y, center.X, center.Y);
}
// Rotation
if (!IsRotateDisabled) // rotation is enabled
{
if (element as TouchImage != null)
{
if ((element as TouchImage).IsRotateDisabled)
{
return; // scale olayı bu canvas için kapalı ise
}
}
matrix.RotateAt(e.DeltaManipulation.Rotation, center.X, center.Y);
}
// Translation (pan)
if (!IsTranslateDisabled) // translation is enabled
{
if (element as TouchImage != null)
{
if ((element as TouchImage).IsTranslateDisabled)
{
return; // scale olayı bu canvas için kapalı ise
}
}
matrix.Translate(e.DeltaManipulation.Translation.X, e.DeltaManipulation.Translation.Y);
}
//Determinant = 1 ise ozaman büyüklük geldiği büyüklüktür.
//Determinant bir child ' ın küçültme ve büyütme faktörüdür.
if ((matrix.Determinant >= MinScaleFactor) && (matrix.Determinant <= MaxScaleFactor || MaxScaleFactor == 0))
{
((MatrixTransform)element.RenderTransform).Matrix = matrix;
}
var videoPlayer = element as TouchVideoPlayer;
if (videoPlayer != null)
{
videoPlayer.Volume = Math.Max(0, Math.Min(matrix.Determinant, 1)); //bind the volume to the render size of the video in the screen
}
e.Handled = true;
if (e.IsInertial)
{
Rect containingRect = new Rect(((FrameworkElement)e.ManipulationContainer).RenderSize);
Rect shapeBounds = element.RenderTransform.TransformBounds(new Rect(element.RenderSize));
// Check if the element is completely in the window.
// If it is not and intertia is occuring, stop the manipulation.
if (e.IsInertial && !containingRect.Contains(shapeBounds) && !containingRect.IntersectsWith(shapeBounds))
{
//Report that we have gone over our boundary
e.ReportBoundaryFeedback(e.DeltaManipulation);
OnthrownOut(element);
// comment out this line to see the Window 'shake' or 'bounce'
// similar to Win32 Windows when they reach a boundary; this comes for free in .NET 4
e.Complete();
}
}
}
}
protected override void OnManipulationDelta(ManipulationDeltaEventArgs e)
{
base.OnManipulationDelta(e);
e.ReportBoundaryFeedback(new ManipulationDelta(new Vector(0, 0), 0, new Vector(0, 0), new Vector(0, 0)));
}