private void AyTreeViewItemCollapsed(object sender, RoutedEventArgs e)
{
TreeViewItem tvi = e.OriginalSource as TreeViewItem;
//tvi.IsExpanded = false;
if (tvi != null && tvi.Items.Count > 0)
{
itemhost = WpfTreeHelper.GetChildObject <ItemsPresenter>(tvi, "ItemsHost");
// double targetHeight = 0;
////添加动画
foreach (var item in tvi.Items)
{
AyTreeViewItemModel temp = item as AyTreeViewItemModel;
if (temp.RelativeItem != null)
{
temp.ParentCategory.IsExpanded = false;
break;
}
}
if (itemhost != null)
{
itemhost.Visibility = Visibility.Visible;
DoubleAnimationUsingKeyFrames HeightKey = new DoubleAnimationUsingKeyFrames();
HeightKey.Duration = new Duration(TimeSpan.FromMilliseconds(ExpandedTime));
HeightKey.FillBehavior = FillBehavior.Stop;
EasingDoubleKeyFrame HeightKey0 = new EasingDoubleKeyFrame(itemhost.ActualHeight, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0)));
EasingDoubleKeyFrame HeightKey1 = new EasingDoubleKeyFrame(0);
HeightKey1.EasingFunction = easyOut;
HeightKey.KeyFrames.Add(HeightKey0);
HeightKey.KeyFrames.Add(HeightKey1);
HeightKey.Completed += HeightKey_Completed;
itemhost.BeginAnimation(ItemsPresenter.HeightProperty, HeightKey);
}
}
e.Handled = true;
}
/// <summary>
/// 每个时常都是一样的,暂定200
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void AyTreeViewItemExpanded(object sender, RoutedEventArgs e)
{
TreeViewItem tvi = e.OriginalSource as TreeViewItem;
if (tvi != null && tvi.Items.Count > 0)
{
int executeTime = 0;//执行time误差
int durationTime = 300;
double targetHeight = 0;
int expandNode = 0;
//添加动画
foreach (var item in tvi.Items)
{
AyTreeViewItemModel temp = item as AyTreeViewItemModel;
temp.ParentCategory.IsExpanded = true;
if (temp.RelativeItem == null)
{
temp.RelativeItem = TreeViewHelper.GetTreeViewItem2(tvi, temp);
}
expandNode += GetTreeViewItemCount(temp);
if (IsNeedMoveAndOpacity)
{
if (temp.RelativeItem != null)
{
temp.RelativeItem.Opacity = 0;
}
}
}
targetHeight += (TreeViewItemHeight + OtherBorderTreeViewHeight) * expandNode;//计算当前展开的有多少个item
//set itemhost的高度
var itemhost = WpfTreeHelper.GetChildObject <ItemsPresenter>(tvi, "ItemsHost");
if (itemhost != null)
{
itemhost.Visibility = Visibility.Visible;
DoubleAnimationUsingKeyFrames HeightKey = new DoubleAnimationUsingKeyFrames();
HeightKey.FillBehavior = FillBehavior.Stop;
EasingDoubleKeyFrame HeightKey0 = new EasingDoubleKeyFrame(0, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0)));
HeightKey.KeyFrames.Add(HeightKey0);
if (IsNeedMoveAndOpacity)
{
EasingDoubleKeyFrame HeightKey1 = new EasingDoubleKeyFrame(targetHeight, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(ExpandedTime)), easyOut);
HeightKey.KeyFrames.Add(HeightKey1);
}
else
{
EasingDoubleKeyFrame HeightKey1 = new EasingDoubleKeyFrame(targetHeight, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(ExpandedTime)));
HeightKey.KeyFrames.Add(HeightKey1);
}
itemhost.BeginAnimation(ItemsPresenter.HeightProperty, null);
itemhost.BeginAnimation(ItemsPresenter.HeightProperty, HeightKey);
}
if (IsNeedMoveAndOpacity)
{
int index = 0;
int endIndex = tvi.Items.Count;
//添加动画
foreach (var item in tvi.Items)
{
AyTreeViewItemModel temp = item as AyTreeViewItemModel;
if (temp.RelativeItem != null)
{
index++;
DoubleAnimationUsingKeyFrames OpacityKey = new DoubleAnimationUsingKeyFrames();
EasingDoubleKeyFrame opacityKey10 = new EasingDoubleKeyFrame(0, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0)));
EasingDoubleKeyFrame opacityKey0 = new EasingDoubleKeyFrame(0, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(executeTime)));
EasingDoubleKeyFrame opacityKey1 = new EasingDoubleKeyFrame(1, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(executeTime + durationTime)));
opacityKey1.EasingFunction = easyIn;
OpacityKey.KeyFrames.Add(opacityKey0);
OpacityKey.KeyFrames.Add(opacityKey1);
ThicknessAnimationUsingKeyFrames MarginKey = new ThicknessAnimationUsingKeyFrames();
var tempThickness = GetTargetThickness(temp.Depth);
MarginKey.KeyFrames.Add(new EasingThicknessKeyFrame(new Thickness(0, 0, 0, 0), KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0))));
MarginKey.KeyFrames.Add(new EasingThicknessKeyFrame(new Thickness(0, 0, 0, 0), KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(executeTime))));
MarginKey.KeyFrames.Add(new EasingThicknessKeyFrame(tempThickness, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(executeTime + durationTime))));
opacityKey1.EasingFunction = easyIn;
temp.RelativeItem.BeginAnimation(TreeViewItem.OpacityProperty, null);
temp.RelativeItem.BeginAnimation(TreeViewItem.OpacityProperty, OpacityKey);
temp.RelativeItem.BeginAnimation(TreeViewItem.PaddingProperty, null);
temp.RelativeItem.BeginAnimation(TreeViewItem.PaddingProperty, MarginKey);
OpacityKey = null;
MarginKey = null;
executeTime += 30;
if (endIndex == index)
{
temp.RelativeItem.BringIntoView();
}
}
}
executeTime = 0;
}
}
e.Handled = true;
}
