private void MovePageTo(PageSliderPage page, PageSlider slider, int newIndex)
{
IDesignerHost dh = this.GetService(typeof(IDesignerHost)) as IDesignerHost;
IComponentChangeService cc = this.GetService(typeof(IComponentChangeService)) as IComponentChangeService;
ISelectionService ss = this.GetService(typeof(ISelectionService)) as ISelectionService;
DesignerTransaction dt = dh.CreateTransaction("Moving page");
if (cc != null)
cc.OnComponentChanging(slider, TypeDescriptor.GetProperties(slider)["Controls"]);
slider.Controls.SetChildIndex(page, newIndex);
if (cc != null)
cc.OnComponentChanged(slider, TypeDescriptor.GetProperties(slider)["Controls"], null, null);
dt.Commit();
}
private void AnimatePageTransition(PageSliderPage oldValue, PageSliderPage newValue)
{
int oldIndex = -1;
if (oldValue != null)
oldIndex = _PageTable.IndexOf(oldValue);
int newIndex = -1;
if (newValue != null)
newIndex = _PageTable.IndexOf(newValue);
if (oldIndex == newIndex)
{
UpdateBoundsForAllPages(false);
_PageBoundsOffset = Point.Empty;
return;
}
int totalOffset = 0;
Rectangle selectedPageBounds = GetSelectedPageBounds();
if (_Orientation == eOrientation.Horizontal)
{
totalOffset = ((oldIndex - newIndex) * (selectedPageBounds.Width + _PageSpacing)) - _PageBoundsOffset.X;
}
else
{
totalOffset = ((oldIndex - newIndex) * (selectedPageBounds.Height + _PageSpacing)) - _PageBoundsOffset.Y;
}
_PageBoundsOffset = Point.Empty;
DateTime startingTime = DateTime.Now;
int speedFactor = 1;
int remainOffset = Math.Abs(totalOffset);
int offsetSign = Math.Sign(totalOffset);
int animationTimeDuration = _AnimationTime;
if (_Orientation == eOrientation.Horizontal && remainOffset < selectedPageBounds.Width * .8 ||
_Orientation == eOrientation.Vertical && remainOffset < selectedPageBounds.Height * .8)
{
if (_Orientation == eOrientation.Horizontal)
animationTimeDuration *= (remainOffset / selectedPageBounds.Width);
else
animationTimeDuration *= (remainOffset / selectedPageBounds.Height);
animationTimeDuration = Math.Max(animationTimeDuration, 50);
}
TimeSpan animationTime = new TimeSpan(0, 0, 0, 0, animationTimeDuration);
while (remainOffset > 0)
{
DateTime startPerMove = DateTime.Now;
foreach (PageSliderPage page in _PageTable)
{
Rectangle bounds = page.Bounds;
if (_Orientation == eOrientation.Horizontal)
bounds.Offset(speedFactor * offsetSign, 0);
else
bounds.Offset(0, speedFactor * offsetSign);
page.Bounds = bounds;
if (bounds.IntersectsWith(this.ClientRectangle))
this.Update();
}
remainOffset -= speedFactor;
TimeSpan elapsedPerMove = DateTime.Now - startPerMove;
TimeSpan elapsedTime = DateTime.Now - startingTime;
if ((animationTime - elapsedTime).TotalMilliseconds <= 0)
speedFactor = remainOffset;
else
{
if ((int)(animationTime - elapsedTime).TotalMilliseconds == 0)
speedFactor = 1;
else
speedFactor = remainOffset * (int)elapsedPerMove.TotalMilliseconds / Math.Max(1, (int)((animationTime - elapsedTime).TotalMilliseconds));
}
if (speedFactor > remainOffset) speedFactor = remainOffset;
}
}
/// <summary>
/// Called when SelectedPage property has changed.
/// </summary>
/// <param name="oldValue">Old property value</param>
/// <param name="newValue">New property value</param>
protected virtual void OnSelectedPageChanged(PageSliderPage oldValue, PageSliderPage newValue)
{
//OnPropertyChanged(new PropertyChangedEventArgs("SelectedPage"));
if (_AnimationTime > 0)
AnimatePageTransition(oldValue, newValue);
else
UpdateBoundsForAllPages(false);
//if (newValue != null)
//{
// newValue.Bounds = GetPageBounds(newValue);
// newValue.BringToFront();
//}
UpdateScrollBar();
_StepIndicator.CurrentStep = this.SelectedPageIndex + 1;
OnSelectedPageChanged(EventArgs.Empty);
}
private System.Drawing.Rectangle GetPageBounds(PageSliderPage page)
{
int pageIndex = _PageTable.IndexOf(page);
int selectedPageIndex = this.SelectedPageIndex;
Rectangle bounds = Rectangle.Empty;
Rectangle selectedPageBounds = GetSelectedPageBounds();
if (pageIndex == selectedPageIndex)
{
bounds = selectedPageBounds;
}
else if (pageIndex > selectedPageIndex)
{
bounds = selectedPageBounds;
if (_Orientation == eOrientation.Horizontal)
bounds.X += (_PageSpacing + bounds.Width) * (pageIndex - selectedPageIndex);
else
bounds.Y += (_PageSpacing + bounds.Height) * (pageIndex - selectedPageIndex);
}
else
{
bounds = selectedPageBounds;
if (_Orientation == eOrientation.Horizontal)
bounds.X -= (_PageSpacing + bounds.Width) * (selectedPageIndex - pageIndex);
else
bounds.Y -= (_PageSpacing + bounds.Height) * (selectedPageIndex - pageIndex);
}
bounds.Offset(_PageBoundsOffset);
return bounds;
}
