/// <summary>
/// Handles touchpad and mouse rotation/zoom (ok)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnPointerWheelChanged(object sender, PointerRoutedEventArgs e)
{
DoLog("PointerWheelChanged");
// get keystates
bool shift = (e.KeyModifiers & VirtualKeyModifiers.Shift) == VirtualKeyModifiers.Shift;
bool ctrl = (e.KeyModifiers & VirtualKeyModifiers.Control) == VirtualKeyModifiers.Control;
if (ctrl)
{
// get new transformation
var newTransformation = FlattenTransformationGroup();
var newDeltaTransform = newTransformation.Children.OfType <CompositeTransform>().FirstOrDefault();
if (newDeltaTransform == null)
{
return;
}
// get center in respect to existing transformations
Point center = _currentTransformations.TransformPoint(e.GetCurrentPoint(_border).Position);
newDeltaTransform.CenterX = center.X;
newDeltaTransform.CenterY = center.Y;
// get scroll info
var deltaScroll = (-1 * e.GetCurrentPoint(_border).Properties.MouseWheelDelta) > 0 ? 0.9 : 1.1;
// handle rotation
if (shift)
{
// rotation
if (deltaScroll > 1)
{
newDeltaTransform.Rotation = -15.0;
DoLog($"delta > 0 -> {newDeltaTransform.Rotation}");
}
else if (deltaScroll < 1)
{
newDeltaTransform.Rotation = 15.0;
DoLog($"delta < 0 -> {newDeltaTransform.Rotation}");
}
}
// handle scale
else
{
newDeltaTransform.ScaleX = newDeltaTransform.ScaleY = deltaScroll;
if (!CheckScaleTresshold(newTransformation))
{
newDeltaTransform.ScaleX = newDeltaTransform.ScaleY = 1.0;
}
}
// update with new transformations
_border.RenderTransform = _currentTransformations = newTransformation;
}
}
public void World1_CombineModelProjection()
{
var gt = new TransformGroup();
gt.Children.Add(new MatrixTransform()
{
Matrix = World1
});
gt.Children.Add(new MatrixTransform()
{
Matrix = Projection
});
TestContext.WriteLine($"final matrix {gt.Value}");
var point = gt.TransformPoint(W1UL);
Assert.AreEqual(Bounds.Left, point.X, "X failed");
Assert.AreEqual(Bounds.Top, point.Y, "Y failed");
point = gt.TransformPoint(W1LR);
Assert.AreEqual(Bounds.Left + Bounds.Width, point.X, "X failed");
Assert.AreEqual(Bounds.Top + Bounds.Height, point.Y, "Y failed");
}
async void ManipulateMe_ManipulationStarted(object sender, Windows.UI.Xaml.Input.ManipulationStartedRoutedEventArgs e)
{
try
{
Point point = new Point(
e.Position.X,
e.Position.Y);
TransformGroup group = new TransformGroup();
TranslateTransform tempTranslateTransform = new TranslateTransform();
tempTranslateTransform.X = _transform.CenterX;
tempTranslateTransform.Y = _transform.CenterY;
RotateTransform tempRotateTransform = new RotateTransform();
tempRotateTransform.CenterX = _transform.CenterX;
tempRotateTransform.CenterY = _transform.CenterY;
tempRotateTransform.Angle = _transform.Rotation;
group.Children.Add(tempTranslateTransform);
group.Children.Add(tempRotateTransform);
Point center = tempRotateTransform.TransformPoint(e.Position);
Point localPoint = group.Inverse.TransformPoint(center);
localPoint.X *= _transform.ScaleX;
localPoint.Y *= _transform.ScaleY;
Point worldPoint = group.TransformPoint(localPoint);
Point distance = new Point(
worldPoint.X - point.X,
worldPoint.Y - point.Y);
_transform.TranslateX += distance.X;
_transform.TranslateY += distance.Y;
_transform.CenterX = point.X;
_transform.CenterY = point.Y;
}
catch (Exception ex)
{
}
}
async void ManipulateMe_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
try
{
Point point = new Point(
e.Position.X,
e.Position.Y);
TransformGroup group = new TransformGroup();
TranslateTransform tempTranslateTransform = new TranslateTransform();
tempTranslateTransform.X = _transform.CenterX;
tempTranslateTransform.Y = _transform.CenterY;
RotateTransform tempRotateTransform = new RotateTransform();
tempRotateTransform.CenterX = _transform.CenterX;
tempRotateTransform.CenterY = _transform.CenterY;
tempRotateTransform.Angle = _transform.Rotation;
group.Children.Add(tempTranslateTransform);
group.Children.Add(tempRotateTransform);
Point center = tempRotateTransform.TransformPoint(e.Position);
Point localPoint = group.Inverse.TransformPoint(center);
localPoint.X *= _transform.ScaleX;
localPoint.Y *= _transform.ScaleY;
Point worldPoint = group.TransformPoint(localPoint);
Point distance = new Point(
worldPoint.X - point.X,
worldPoint.Y - point.Y);
_transform.TranslateX += distance.X;
_transform.TranslateY += distance.Y;
CurrentZoomScale = _transform.ScaleY = _transform.ScaleX *= e.Delta.Scale;
if (_transform.Rotation > 360)
{
_transform.Rotation -= 360;
}
else if (_transform.Rotation < -360)
{
_transform.Rotation += 360;
}
RotationOffset = _transform.Rotation += e.Delta.Rotation;
_transform.CenterX = point.X;
_transform.CenterY = point.Y;
DebugDot.RenderTransform = new TranslateTransform()
{
X = point.X,
Y = point.Y
};
Rect desktopBounds = BoundsRelativeTo(Outer, LayoutRoot);
double zoomRatio = Outer.ActualWidth / desktopBounds.Width;
double zoomRatioInvert = desktopBounds.Width / Outer.ActualWidth;
double edgeBufferYPadding = 0;
if (desktopBounds.X < LayoutRoot.ActualWidth / 2 && desktopBounds.Right > LayoutRoot.ActualWidth / 2)
{
_transform.TranslateX += e.Delta.Translation.X;
}
if (desktopBounds.X > LayoutRoot.ActualWidth / 2)
{
_transform.TranslateX += e.Delta.Translation.X - (desktopBounds.X - (LayoutRoot.ActualWidth / 2) - 1);
}
if (desktopBounds.Right < LayoutRoot.ActualWidth / 2)
{
_transform.TranslateX += e.Delta.Translation.X - (desktopBounds.Right - (LayoutRoot.ActualWidth / 2) - 1);
}
if (desktopBounds.Y + edgeBufferYPadding < LayoutRoot.ActualHeight / 2 && desktopBounds.Bottom - edgeBufferYPadding * zoomRatio > LayoutRoot.ActualHeight / 2)
{
_transform.TranslateY += e.Delta.Translation.Y;
}
if (desktopBounds.Y + edgeBufferYPadding * zoomRatio > LayoutRoot.ActualHeight / 2)
{
_transform.TranslateY += e.Delta.Translation.Y - (desktopBounds.Y + edgeBufferYPadding - (LayoutRoot.ActualHeight / 2) - 1);
}
if (desktopBounds.Bottom - edgeBufferYPadding < LayoutRoot.ActualHeight / 2)
{
_transform.TranslateY += e.Delta.Translation.Y - (desktopBounds.Bottom - edgeBufferYPadding - (LayoutRoot.ActualHeight / 2) - 1);
}
}
catch (Exception ex)
{
}
}
