void HScrollBar_ValueChanged(object sender, RoutedPropertyChangedEventArgs <double> e)
{
AnimatedScrollViewer thisScroller = this;
double oldTargetHOffset = (double)e.OldValue;
double newTargetHOffset = (double)e.NewValue;
if (newTargetHOffset != thisScroller.TargetHorizontalOffset)
{
double deltaVOffset = Math.Round((newTargetHOffset - oldTargetHOffset), 3);
if (deltaVOffset == 1)
{
thisScroller.TargetHorizontalOffset = oldTargetHOffset + thisScroller.ViewportWidth;
}
else if (deltaVOffset == -1)
{
thisScroller.TargetHorizontalOffset = oldTargetHOffset - thisScroller.ViewportWidth;
}
else if (deltaVOffset == 0.1)
{
thisScroller.TargetHorizontalOffset = oldTargetHOffset + 16.0;
}
else if (deltaVOffset == -0.1)
{
thisScroller.TargetHorizontalOffset = oldTargetHOffset - 16.0;
}
else
{
thisScroller.TargetHorizontalOffset = newTargetHOffset;
}
}
}
void AnimatedScrollViewer_PreviewKeyDown(object sender, KeyEventArgs e)
{
AnimatedScrollViewer thisScroller = (AnimatedScrollViewer)sender;
if (thisScroller.CanKeyboardScroll)
{
Key keyPressed = e.Key;
double newVerticalPos = thisScroller.TargetVerticalOffset;
double newHorizontalPos = thisScroller.TargetHorizontalOffset;
bool isKeyHandled = false;
//Vertical Key Strokes code
if (keyPressed == Key.Down)
{
newVerticalPos = NormalizeScrollPos(thisScroller, (newVerticalPos + 16.0), Orientation.Vertical);
isKeyHandled = true;
}
else if (keyPressed == Key.PageDown)
{
newVerticalPos = NormalizeScrollPos(thisScroller, (newVerticalPos + thisScroller.ViewportHeight), Orientation.Vertical);
isKeyHandled = true;
}
else if (keyPressed == Key.Up)
{
newVerticalPos = NormalizeScrollPos(thisScroller, (newVerticalPos - 16.0), Orientation.Vertical);
isKeyHandled = true;
}
else if (keyPressed == Key.PageUp)
{
newVerticalPos = NormalizeScrollPos(thisScroller, (newVerticalPos - thisScroller.ViewportHeight), Orientation.Vertical);
isKeyHandled = true;
}
if (newVerticalPos != thisScroller.TargetVerticalOffset)
{
thisScroller.TargetVerticalOffset = newVerticalPos;
}
//Horizontal Key Strokes Code
if (keyPressed == Key.Right)
{
newHorizontalPos = NormalizeScrollPos(thisScroller, (newHorizontalPos + 16), Orientation.Horizontal);
isKeyHandled = true;
}
else if (keyPressed == Key.Left)
{
newHorizontalPos = NormalizeScrollPos(thisScroller, (newHorizontalPos - 16), Orientation.Horizontal);
isKeyHandled = true;
}
if (newHorizontalPos != thisScroller.TargetHorizontalOffset)
{
thisScroller.TargetHorizontalOffset = newHorizontalPos;
}
e.Handled = isKeyHandled;
}
}
private static void OnTargetHorizontalOffsetChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AnimatedScrollViewer thisScroller = (AnimatedScrollViewer)d;
if ((double)e.NewValue != thisScroller._aniHorizontalScrollBar.Value)
{
thisScroller._aniHorizontalScrollBar.Value = (double)e.NewValue;
}
thisScroller.animateScroller(thisScroller);
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
AnimatedScrollViewer scrollViewerHolder = base.GetTemplateChild("PART_AnimatedScrollViewer") as AnimatedScrollViewer;
if (scrollViewerHolder != null)
{
_scrollViewer = scrollViewerHolder;
}
this.SelectionChanged += new SelectionChangedEventHandler(AnimatedListBox_SelectionChanged);
this.Loaded += new RoutedEventHandler(AnimatedListBox_Loaded);
this.LayoutUpdated += new EventHandler(AnimatedListBox_LayoutUpdated);
}
private double NormalizeScrollPos(AnimatedScrollViewer thisScroll, double scrollChange, Orientation o)
{
double returnValue = scrollChange;
if (scrollChange < 0)
{
returnValue = 0;
}
if (o == Orientation.Vertical && scrollChange > thisScroll.ScrollableHeight)
{
returnValue = thisScroll.ScrollableHeight;
}
else if (o == Orientation.Horizontal && scrollChange > thisScroll.ScrollableWidth)
{
returnValue = thisScroll.ScrollableWidth;
}
return(returnValue);
}
void CustomPreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
double mouseWheelChange = (double)e.Delta;
AnimatedScrollViewer thisScroller = (AnimatedScrollViewer)sender;
double newVOffset = thisScroller.TargetVerticalOffset - (mouseWheelChange / 3);
if (newVOffset < 0)
{
thisScroller.TargetVerticalOffset = 0;
}
else if (newVOffset > thisScroller.ScrollableHeight)
{
thisScroller.TargetVerticalOffset = thisScroller.ScrollableHeight;
}
else
{
thisScroller.TargetVerticalOffset = newVOffset;
}
e.Handled = true;
}
private void animateScroller(object objectToScroll)
{
AnimatedScrollViewer thisScrollViewer = objectToScroll as AnimatedScrollViewer;
Duration targetTime = new Duration(thisScrollViewer.ScrollingTime);
KeyTime targetKeyTime = thisScrollViewer.ScrollingTime;
KeySpline targetKeySpline = thisScrollViewer.ScrollingSpline;
DoubleAnimationUsingKeyFrames animateHScrollKeyFramed = new DoubleAnimationUsingKeyFrames();
DoubleAnimationUsingKeyFrames animateVScrollKeyFramed = new DoubleAnimationUsingKeyFrames();
SplineDoubleKeyFrame HScrollKey1 = new SplineDoubleKeyFrame(thisScrollViewer.TargetHorizontalOffset, targetKeyTime, targetKeySpline);
SplineDoubleKeyFrame VScrollKey1 = new SplineDoubleKeyFrame(thisScrollViewer.TargetVerticalOffset, targetKeyTime, targetKeySpline);
animateHScrollKeyFramed.KeyFrames.Add(HScrollKey1);
animateVScrollKeyFramed.KeyFrames.Add(VScrollKey1);
thisScrollViewer.BeginAnimation(HorizontalScrollOffsetProperty, animateHScrollKeyFramed);
thisScrollViewer.BeginAnimation(VerticalScrollOffsetProperty, animateVScrollKeyFramed);
CommandBindingCollection testCollection = thisScrollViewer.CommandBindings;
int blah = testCollection.Count;
}
private static void OnVerticalScrollOffsetChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AnimatedScrollViewer thisSViewer = (AnimatedScrollViewer)d;
thisSViewer.ScrollToVerticalOffset((double)e.NewValue);
}