private void gesture_PinchDelta(object sender, PinchGestureEventArgs e)
{
var point = e.GetPosition(ContentPanel, 0);
var point2 = e.GetPosition(ContentPanel, 1);
message.Text = string.Format("pinch delta at ({0},{1}) and ({1},{2}) with angle delta {3} and distance ratio {4}",
point.X, point.Y, point2.X, point2.Y, e.TotalAngleDelta, e.DistanceRatio);
}
private void OnPinchDelta(object sender, PinchGestureEventArgs e)
{
var finger1 = e.GetPosition(ImgZoom, 0);
var finger2 = e.GetPosition(ImgZoom, 1);
var center = new Point(
(finger2.X + finger1.X) / 2 / ImgZoom.ActualWidth,
(finger2.Y + finger1.Y) / 2 / ImgZoom.ActualHeight);
ImgZoom.RenderTransformOrigin = center;
var transform = (CompositeTransform)ImgZoom.RenderTransform;
transform.ScaleX = initialScale * e.DistanceRatio;
transform.ScaleY = transform.ScaleX;
}
private void OnPinchDelta(object s, PinchGestureEventArgs e)
{
var scaleFactor = e.DistanceRatio / _oldScaleFactor;
var currentFinger1 = e.GetPosition(bigPicture, 0);
var currentFinger2 = e.GetPosition(bigPicture, 1);
var translationDelta = GetTranslationDelta(
currentFinger1,
currentFinger2,
_oldFinger1,
_oldFinger2,
ImagePosition,
scaleFactor);
_oldFinger1 = currentFinger1;
_oldFinger2 = currentFinger2;
_oldScaleFactor = e.DistanceRatio;
UpdateImage(scaleFactor, translationDelta);
}
/// <summary>
/// Computes the scaling and translation to correctly zoom around your fingers.
/// </summary>
private void OnPinchDelta(object sender, PinchGestureEventArgs e)
{
var scaleFactor = e.DistanceRatio / _oldScaleFactor;
if (!IsScaleValid(scaleFactor))
return;
var currentFinger1 = e.GetPosition(ImgZoom, 0);
var currentFinger2 = e.GetPosition(ImgZoom, 1);
var translationDelta = GetTranslationDelta(
currentFinger1,
currentFinger2,
_oldFinger1,
_oldFinger2,
ImagePosition,
scaleFactor);
_oldFinger1 = currentFinger1;
_oldFinger2 = currentFinger2;
_oldScaleFactor = e.DistanceRatio;
UpdateImageScale(scaleFactor);
UpdateImagePosition(translationDelta);
}
private void OnPinchDelta(object sender, PinchGestureEventArgs e)
{
// if its less that the original size or more than 4x then does not apply
if (initialScale * e.DistanceRatio > 4 ||
(Math.Abs(initialScale - 1) > 0.01 && Math.Abs(e.DistanceRatio - 1) < 0.01) ||
initialScale * e.DistanceRatio < 1)
return;
// if its original size then center it back
if (e.DistanceRatio <= 1.08)
{
ImageTransformation.CenterY = 0;
ImageTransformation.CenterY = 0;
ImageTransformation.TranslateX = 0;
ImageTransformation.TranslateY = 0;
}
var scaleFactor = e.DistanceRatio / _oldScaleFactor;
var currentFinger1 = e.GetPosition(DetailImage, 0);
var currentFinger2 = e.GetPosition(DetailImage, 1);
var translationDelta = GetTranslationDelta(
currentFinger1,
currentFinger2,
_oldFinger1,
_oldFinger2,
ImagePosition,
scaleFactor);
_oldFinger1 = currentFinger1;
_oldFinger2 = currentFinger2;
_oldScaleFactor = e.DistanceRatio;
UpdateImage(scaleFactor, translationDelta);
ImageTransformation.CenterX = center.X;
ImageTransformation.CenterY = center.Y;
//// update the rotation and scaling
//if (Orientation == PageOrientation.Landscape)
//{
// // when in landscape we need to zoom faster, if not it looks choppy
// ImageTransformation.ScaleX = initialScale * (1 + (e.DistanceRatio - 1) * 2);
//}
//else
//{
// ImageTransformation.ScaleX = initialScale * e.DistanceRatio;
//}
//ImageTransformation.ScaleY = ImageTransformation.ScaleX;
}
private void OnGestureListenerPinchDelta(object sender, PinchGestureEventArgs args)
{
if (_isPinching)
{
// Set scaling
scaleTransform.ScaleX = args.DistanceRatio;
scaleTransform.ScaleY = args.DistanceRatio;
rotateTransform.Angle = args.TotalAngleDelta;
// Set translation
Point ptPinchPosition = args.GetPosition(this);
translateTransform.X = ptPinchPosition.X - _ptPinchPositionStart.X;
translateTransform.Y = ptPinchPosition.Y - _ptPinchPositionStart.Y;
}
}
private void gestureListener_PinchDelta(object sender, PinchGestureEventArgs e)
{
if (imageMan == null)
return;
Interlocked.CompareExchange(ref zooming, 1, 0);
var scaleFactor = e.DistanceRatio / _oldScaleFactor;
if (!IsScaleValid(scaleFactor))
return;
var currentFinger1 = e.GetPosition(image, 0);
var currentFinger2 = e.GetPosition(image, 1);
var translationDelta = GetTranslationDelta(
currentFinger1,
currentFinger2,
_oldFinger1,
_oldFinger2,
ImagePosition,
scaleFactor);
_oldFinger1 = currentFinger1;
_oldFinger2 = currentFinger2;
_oldScaleFactor = e.DistanceRatio;
UpdateImageScale(scaleFactor);
UpdateImagePosition(translationDelta);
}
/// <summary>
/// 手势操作过程中
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnPinchDelta(object sender, PinchGestureEventArgs e)
{
var point = e.GetPosition(this);
_imgTrans.ScaleX = _initialScale * e.DistanceRatio;
_imgTrans.ScaleY = _initialScale * e.DistanceRatio;
}
private void OnPinchDelta(object sender, PinchGestureEventArgs e)
{
if (isAnimating)
return;
var scaleFactor = e.DistanceRatio / oldScaleFactor;
if (!IsScaleValid(scaleFactor))
return;
var currentFinger1 = e.GetPosition(_content, 0);
var currentFinger2 = e.GetPosition(_content, 1);
var translationDelta = GetTranslationDelta(currentFinger1, currentFinger2, scaleFactor);
oldFinger1 = currentFinger1;
oldFinger2 = currentFinger2;
oldScaleFactor = e.DistanceRatio;
UpdateScale(scaleFactor);
UpdatePosition(translationDelta);
e.Handled = true;
}
// event to handle gesture support for the object
private void GestureListener_PinchDelta(object sender, PinchGestureEventArgs e)
{
Point cf1 = e.GetPosition(this.mImageRectangle, 0); // current finger 1
Point cf2 = e.GetPosition(this.mImageRectangle, 1); // current finger 2
Point cm = new Point((0.5f * (cf1.X + cf2.X)), (0.5f * (cf1.Y + cf2.Y)));
Point newPos = new Point(cm.X + (this.deltaVec.X * e.DistanceRatio),
cm.Y + (this.deltaVec.Y * e.DistanceRatio));
CompositeTransform t = imageToShow.Transform as CompositeTransform;
t.ScaleX = e.DistanceRatio * scaleRef;
t.ScaleY = e.DistanceRatio * scaleRef;
t.TranslateX = newPos.X;
t.TranslateY = newPos.Y;
}
private void OnPinchDelta(object s, PinchGestureEventArgs e)
{
var finger1 = e.GetPosition(imgPhotos, 0);
var finger2 = e.GetPosition(imgPhotos, 1);
var center = new Point(
(finger2.X + finger1.X) / 2 / imgPhotos.ActualWidth,
(finger2.Y + finger1.Y) / 2 / imgPhotos.ActualHeight);
imgPhotos.RenderTransformOrigin = center;
if (initialScale >= 1.0 )
{
var transform = (CompositeTransform)imgPhotos.RenderTransform;
if (initialScale * e.DistanceRatio >= 1.0)
{
transform.ScaleX = initialScale * e.DistanceRatio;
transform.ScaleY = transform.ScaleX;
}
}
}
/// <summary>
/// Computes the scaling and translation to correctly zoom around your fingers.
/// </summary>
private static void OnPinchDelta(object sender, PinchGestureEventArgs e)
{
ImageZoomerSettings settings;
Image image = sender as Image;
if (image == null)
return;
if (Images.TryGetValue(image, out settings))
{
var scaleFactor = e.DistanceRatio / settings.oldScaleFactor;
if (!IsScaleValid(scaleFactor, settings))
return;
var currentFinger1 = e.GetPosition(image, 0);
var currentFinger2 = e.GetPosition(image, 1);
var translationDelta = GetTranslationDelta(
currentFinger1,
currentFinger2,
settings.oldFinger1,
settings.oldFinger2,
settings.ImagePosition,
scaleFactor);
settings.oldFinger1 = currentFinger1;
settings.oldFinger2 = currentFinger2;
settings.oldScaleFactor = e.DistanceRatio;
UpdateImageScale(scaleFactor, image, settings);
UpdateImagePosition(translationDelta, image, settings);
}
}
private void myGridGestureListener_PinchDelta(object sender, PinchGestureEventArgs e)
{
Point center = e.GetPosition(image);
_relativeMidpoint = new Point(center.X / image.ActualWidth, center.Y / image.ActualHeight);
var xform = image.TransformToVisual(viewport);
_screenMidpoint = xform.Transform(center);
_coercedScale = _scale = _originalScale * e.DistanceRatio;
ResizeImage(false);
}
private void OnPinchDelta(object s, PinchGestureEventArgs e)
{
var newScale = e.DistanceRatio / _previousScale;
var currentFingerOne = e.GetPosition(MyImage, 0);
var currentFingerTwo = e.GetPosition(MyImage, 1);
var translationDelta = GetTranslationOffset(currentFingerOne,
currentFingerTwo, _fingerOne, _fingerTwo, _imageTranslation, newScale);
_fingerOne = currentFingerOne;
_fingerTwo = currentFingerTwo;
_previousScale = e.DistanceRatio;
UpdatePicture(newScale, translationDelta);
}