/// <summary>
/// 如果需要，创建初始的 UI 元素。
/// </summary>
private void UpdateVisualTree()
{
if (this.NeedUpdateVisualTree)
{
var internalChildren = base.UIChildren;
internalChildren.Clear();
foreach (var column in base.Columns)
{
var summary = new TreeGridColumnSummary();
summary.Column = column;
summary.DataContext = column;
summary.SetBinding(TreeGridColumnSummary.SummaryTextProperty, TreeGridColumn.SummaryProperty);
summary.IsSummaryVisible = column.NeedSummary;
internalChildren.Add(summary);
}
//在所有列后添加一个 _paddingSummary。
this._paddingSummary = new TreeGridColumnSummary();
internalChildren.Add(this._paddingSummary);
//把 rowTitle 添加为最后一个元素。
var grid = this.TreeGrid;
this._summaryRowTitle = new TextBlock
{
Text = grid.SummaryRowTitle,
Style = grid.SummaryRowTitleStyle
};
internalChildren.Add(this._summaryRowTitle);
this.NeedUpdateVisualTree = false;
}
}
/// <summary>
/// 如果需要，创建初始的 UI 元素。
/// </summary>
private void UpdateVisualTree()
{
if (this.NeedUpdateVisualTree)
{
var internalChildren = base.UIChildren;
internalChildren.Clear();
foreach (var column in base.Columns)
{
var summary = new TreeGridColumnSummary();
summary.Column = column;
summary.DataContext = column;
summary.SetBinding(TreeGridColumnSummary.SummaryTextProperty, TreeGridColumn.SummaryProperty);
summary.IsSummaryVisible = column.NeedSummary;
internalChildren.Add(summary);
}
//在所有列后添加一个 _paddingSummary。
this._paddingSummary = new TreeGridColumnSummary();
internalChildren.Add(this._paddingSummary);
//把 rowTitle 添加为最后一个元素。
var grid = this.TreeGrid;
this._summaryRowTitle = new TextBlock
{
Text = grid.SummaryRowTitle,
Style = grid.SummaryRowTitleStyle
};
internalChildren.Add(this._summaryRowTitle);
this.NeedUpdateVisualTree = false;
}
}