|
public static StartAnimation ( |
||
| animatableElement | ||
| dependencyProperty | ||
| toValue | double | |
| animationDurationSeconds | double | |
| return | void | |
/// <summary>
/// Zoom in/out centered on the specified point (in content coordinates).
/// The focus point is kept locked to it's on screen position (ala google maps).
/// </summary>
public void AnimatedZoomAboutPoint(double newContentScale, Point contentZoomFocus)
{
newContentScale = Math.Min(Math.Max(newContentScale, MinContentScale), MaxContentScale);
AnimationHelper.CancelAnimation(this, ContentZoomFocusXProperty);
AnimationHelper.CancelAnimation(this, ContentZoomFocusYProperty);
AnimationHelper.CancelAnimation(this, ViewportZoomFocusXProperty);
AnimationHelper.CancelAnimation(this, ViewportZoomFocusYProperty);
ContentZoomFocusX = contentZoomFocus.X;
ContentZoomFocusY = contentZoomFocus.Y;
ViewportZoomFocusX = (ContentZoomFocusX - ContentOffsetX) * ContentScale;
ViewportZoomFocusY = (ContentZoomFocusY - ContentOffsetY) * ContentScale;
//
// When zooming about a point make updates to ContentScale also update content offset.
//
enableContentOffsetUpdateFromScale = true;
AnimationHelper.StartAnimation(this, ContentScaleProperty, newContentScale, AnimationDuration,
delegate(object sender, EventArgs e)
{
enableContentOffsetUpdateFromScale = false;
ResetViewportZoomFocus();
});
}
/// <summary>
/// Zoom to the specified scale and move the specified focus point to the center of the viewport.
/// </summary>
private void AnimatedZoomPointToViewportCenter(double newContentScale, Point contentZoomFocus, EventHandler callback)
{
newContentScale = Math.Min(Math.Max(newContentScale, MinContentScale), MaxContentScale);
AnimationHelper.CancelAnimation(this, ContentZoomFocusXProperty);
AnimationHelper.CancelAnimation(this, ContentZoomFocusYProperty);
AnimationHelper.CancelAnimation(this, ViewportZoomFocusXProperty);
AnimationHelper.CancelAnimation(this, ViewportZoomFocusYProperty);
ContentZoomFocusX = contentZoomFocus.X;
ContentZoomFocusY = contentZoomFocus.Y;
ViewportZoomFocusX = (ContentZoomFocusX - ContentOffsetX) * ContentScale;
ViewportZoomFocusY = (ContentZoomFocusY - ContentOffsetY) * ContentScale;
//
// When zooming about a point make updates to ContentScale also update content offset.
//
enableContentOffsetUpdateFromScale = true;
AnimationHelper.StartAnimation(this, ContentScaleProperty, newContentScale, AnimationDuration,
delegate(object sender, EventArgs e)
{
enableContentOffsetUpdateFromScale = false;
if (callback != null)
{
callback(this, EventArgs.Empty);
}
});
AnimationHelper.StartAnimation(this, ViewportZoomFocusXProperty, ViewportWidth / 2, AnimationDuration);
AnimationHelper.StartAnimation(this, ViewportZoomFocusYProperty, ViewportHeight / 2, AnimationDuration);
}
/// <summary>
/// Use animation to center the view on the specified point (in content coordinates).
/// </summary>
public void AnimatedSnapTo(Point contentPoint)
{
double newX = contentPoint.X - (this.ContentViewportWidth / 2);
double newY = contentPoint.Y - (this.ContentViewportHeight / 2);
AnimationHelper.StartAnimation(this, ContentOffsetXProperty, newX, AnimationDuration);
AnimationHelper.StartAnimation(this, ContentOffsetYProperty, newY, AnimationDuration);
}
//
// Fade out the drag zoom rectangle.
//
private void FadeOutDragZoomRect()
{
#if !SILVERLIGHT
AnimationHelper.StartAnimation(dragZoomBorder, Border.OpacityProperty, 0.0, 0.1,
delegate(object sender, EventArgs e)
{
dragZoomCanvas.Visibility = Visibility.Collapsed;
});
#else
dragZoomCanvas.Visibility = Visibility.Collapsed;
#endif
}
//
// Fade out the drag zoom rectangle.
//
private void FadeOutDragZoomRect()
{
AnimationHelper.StartAnimation(_partDragZoomBorder, OpacityProperty, 0.0, 0.1,
delegate { _partDragZoomCanvas.Visibility = Visibility.Collapsed; }, UseAnimations);
}
