internal override void OnColumnCollectionChanged(TreeGridColumnCollectionChangedEventArgs e)
{
base.OnColumnCollectionChanged(e);
this.NeedUpdateVisualTree = true;
this.InvalidateMeasure();
}
internal override void OnColumnCollectionChanged(TreeGridColumnCollectionChangedEventArgs e)
{
base.OnColumnCollectionChanged(e);
this.NeedUpdateVisualTree = true;
this.InvalidateMeasure();
}
private void OnInternalCollectionChanged()
{
if (this.InternalCollectionChanged != null && this._internalEventArg != null)
{
this.InternalCollectionChanged(this, this._internalEventArg);
this._internalEventArg = null;
}
}
internal void UpdateItemsSourceOnColumnsChanged(TreeGridColumnCollectionChangedEventArgs e)
{
var multipleCopiesCollection = base.ItemsSource as MultipleCopiesCollection;
if (multipleCopiesCollection != null)
{
multipleCopiesCollection.MirrorCollectionChange(e);
}
}
/// <summary>
/// 在列的项变化时，同步变化对应的单元格列表 UIChildren。
/// </summary>
/// <param name="e"></param>
private void OnColumnCollectionChanged(TreeGridColumnCollectionChangedEventArgs e)
{
TreeGridHelper.UpdateDesiredWidthListOnColumnChanged(ref this._desiredWidthList, e);
if (this.TryConnect())
{
this._cellsPresenter.UpdateItemsSourceOnColumnsChanged(e);
base.InvalidateMeasure();
}
}
/// <summary>
/// 在列的项变化时，同步变化对应的单元格列表 UIChildren。
/// </summary>
/// <param name="e"></param>
internal override void OnColumnCollectionChanged(TreeGridColumnCollectionChangedEventArgs e)
{
base.OnColumnCollectionChanged(e);
var internalChildren = base.UIChildren;
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
int visualIndex = this.GetVisualIndex(e.NewStartingIndex);
var column = (TreeGridColumn)e.NewItems[0];
this.CreateAndInsertHeader(column, visualIndex + 1);
break;
}
case NotifyCollectionChangedAction.Remove:
this.RemoveHeader(null, this.GetVisualIndex(e.OldStartingIndex));
break;
case NotifyCollectionChangedAction.Replace:
{
int visualIndex = this.GetVisualIndex(e.OldStartingIndex);
this.RemoveHeader(null, visualIndex);
var column = (TreeGridColumn)e.NewItems[0];
this.CreateAndInsertHeader(column, visualIndex);
break;
}
case NotifyCollectionChangedAction.Move:
{
int visualIndex2 = this.GetVisualIndex(e.OldStartingIndex);
int visualIndex3 = this.GetVisualIndex(e.NewStartingIndex);
var element = (TreeGridColumnHeader)internalChildren[visualIndex2];
internalChildren.RemoveAt(visualIndex2);
internalChildren.Insert(visualIndex3, element);
break;
}
case NotifyCollectionChangedAction.Reset:
{
int count = e.ClearedColumns.Count;
for (int i = 0; i < count; i++)
{
this.RemoveHeader(null, 1);
}
break;
}
}
this.BuildHeaderLinks();
this._isColumnChangedOrCreated = true;
}
/// <summary>
/// 当前 Columns 集合发生变更时，执行此回调。
/// </summary>
/// <param name="e"></param>
internal virtual void OnColumnCollectionChanged(TreeGridColumnCollectionChangedEventArgs e)
{
TreeGridHelper.UpdateDesiredWidthListOnColumnChanged(ref this._desiredWidthList, e);
}
internal void UpdateItemsSourceOnColumnsChanged(TreeGridColumnCollectionChangedEventArgs e)
{
var multipleCopiesCollection = base.ItemsSource as MultipleCopiesCollection;
if (multipleCopiesCollection != null)
{
multipleCopiesCollection.MirrorCollectionChange(e);
}
}
/// <summary>
/// 当前 Columns 集合发生变更时，执行此回调。
/// </summary>
/// <param name="e"></param>
internal virtual void OnColumnCollectionChanged(TreeGridColumnCollectionChangedEventArgs e)
{
TreeGridHelper.UpdateDesiredWidthListOnColumnChanged(ref this._desiredWidthList, e);
}
/// <summary>
/// 保证 desiredList 与 columns 长度一致。
/// </summary>
internal static void UpdateDesiredWidthListOnColumnChanged(ref List<double> desiredList, TreeGridColumnCollectionChangedEventArgs e)
{
if (desiredList != null)
{
if (e.Action == NotifyCollectionChangedAction.Remove || e.Action == NotifyCollectionChangedAction.Replace)
{
if (desiredList.Count > e.StableIndex)
{
desiredList.RemoveAt(e.StableIndex);
return;
}
}
else
{
if (e.Action == NotifyCollectionChangedAction.Reset)
{
desiredList = null;
}
}
}
}
/// <summary>
/// 在列的项变化时，同步变化对应的单元格列表 UIChildren。
/// </summary>
/// <param name="e"></param>
private void OnColumnCollectionChanged(TreeGridColumnCollectionChangedEventArgs e)
{
TreeGridHelper.UpdateDesiredWidthListOnColumnChanged(ref this._desiredWidthList, e);
if (this.TryConnect())
{
this._cellsPresenter.UpdateItemsSourceOnColumnsChanged(e);
base.InvalidateMeasure();
}
}
/// <summary>
/// 在列的项变化时，同步变化对应的单元格列表 UIChildren。
/// </summary>
/// <param name="e"></param>
internal override void OnColumnCollectionChanged(TreeGridColumnCollectionChangedEventArgs e)
{
base.OnColumnCollectionChanged(e);
var internalChildren = base.UIChildren;
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
int visualIndex = this.GetVisualIndex(e.NewStartingIndex);
var column = (TreeGridColumn)e.NewItems[0];
this.CreateAndInsertHeader(column, visualIndex + 1);
break;
}
case NotifyCollectionChangedAction.Remove:
this.RemoveHeader(null, this.GetVisualIndex(e.OldStartingIndex));
break;
case NotifyCollectionChangedAction.Replace:
{
int visualIndex = this.GetVisualIndex(e.OldStartingIndex);
this.RemoveHeader(null, visualIndex);
var column = (TreeGridColumn)e.NewItems[0];
this.CreateAndInsertHeader(column, visualIndex);
break;
}
case NotifyCollectionChangedAction.Move:
{
int visualIndex2 = this.GetVisualIndex(e.OldStartingIndex);
int visualIndex3 = this.GetVisualIndex(e.NewStartingIndex);
var element = (TreeGridColumnHeader)internalChildren[visualIndex2];
internalChildren.RemoveAt(visualIndex2);
internalChildren.Insert(visualIndex3, element);
break;
}
case NotifyCollectionChangedAction.Reset:
{
int count = e.ClearedColumns.Count;
for (int i = 0; i < count; i++)
{
this.RemoveHeader(null, 1);
}
break;
}
}
this.BuildHeaderLinks();
this._isColumnChangedOrCreated = true;
}
/// <summary>
/// 保证 desiredList 与 columns 长度一致。
/// </summary>
internal static void UpdateDesiredWidthListOnColumnChanged(ref List <double> desiredList, TreeGridColumnCollectionChangedEventArgs e)
{
if (desiredList != null)
{
if (e.Action == NotifyCollectionChangedAction.Remove || e.Action == NotifyCollectionChangedAction.Replace)
{
if (desiredList.Count > e.StableIndex)
{
desiredList.RemoveAt(e.StableIndex);
return;
}
}
else
{
if (e.Action == NotifyCollectionChangedAction.Reset)
{
desiredList = null;
}
}
}
}