public int GetTreeViewItemCount(AyTreeViewItemModel temp)
{
int a = 1;
if (temp.IsExpanded && temp.Children != null)
{
foreach (var item in temp.Children)
{
a += GetTreeViewItemCount(item);
}
}
return(a);
}
public AyTreeViewItemModel(string text, AyTreeViewItemModel parent)
: this(text, null, parent)
{
if (parent != null)
{
this.Depth = parent.Depth + 1;
if (parent.children.Count > 0)
{
parent.IsCatagory = true;
}
parent.children.Add(this);
}
Uid = Guid.NewGuid();
}
public AyTreeViewItemModel(string text, string icon, AyTreeViewItemModel parent)
{
this.text = text;
this.parent = parent;
this.Icon = icon;
if (parent != null)
{
parent.children.Add(this);
if (parent.children.Count > 0)
{
parent.IsCatagory = true;
}
this.Depth = parent.Depth + 1;
}
Uid = Guid.NewGuid();
}
public AyTreeViewItemModel(string text, string icon, AyTreeViewItemModel parent, bool isExpanded, object[] extValues)
{
this.text = text;
this.parent = parent;
this.Icon = icon;
this.IsExpanded = isExpanded;
if (parent != null)
{
parent.children.Add(this);
if (parent.children.Count > 0)
{
parent.IsCatagory = true;
}
this.Depth = parent.Depth + 1;
}
this.ExtValues = extValues;
Uid = Guid.NewGuid();
}
public AyTreeViewItemModel(string text, string icon, AyTreeViewItemModel parent, bool isExpanded, bool isSpecParentN)
{
this.text = text;
this.parent = parent;
this.Icon = icon;
this.IsExpanded = isExpanded;
this.IsSpecParentNode = isSpecParentN;
if (parent != null)
{
parent.children.Add(this);
if (parent.children.Count > 0)
{
parent.IsCatagory = true;
}
this.Depth = parent.Depth + 1;
}
Uid = Guid.NewGuid();
}
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)
{
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;
}
public AyTreeViewItemModel TryFindNodeByName(AyTreeViewItemModel parent, string text)
{
ObservableCollection <AyTreeViewItemModel> cats;
cats = parent == null ? nodes : parent.Children;
foreach (AyTreeViewItemModel category in cats)
{
if (category.Text == text)
{
return(category);
}
else
{
AyTreeViewItemModel cat = TryFindNodeByName(category, text);
if (cat != null)
{
return(cat);
}
}
}
return(null);
}
/// <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 (temp.RelativeItem != null)
{
temp.RelativeItem.Opacity = 0;
}
}
targetHeight += (TreeViewItemHeight + 2) * 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)));
EasingDoubleKeyFrame HeightKey1 = new EasingDoubleKeyFrame(targetHeight, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(ExpandedTime)), easyOut);
HeightKey.KeyFrames.Add(HeightKey0);
HeightKey.KeyFrames.Add(HeightKey1);
itemhost.BeginAnimation(ItemsPresenter.HeightProperty, null);
itemhost.BeginAnimation(ItemsPresenter.HeightProperty, HeightKey);
}
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 += 44;
if (endIndex == index)
{
temp.RelativeItem.BringIntoView();
}
}
}
executeTime = 0;
}
e.Handled = true;
}