void lbHeader_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
e.Handled = true;
if (this.IsSelected)
{
return;
}
TonyTabControl parent = this.Parent as TonyTabControl;
if (parent != null && parent.Items.Count > 0)
{
foreach (var item in parent.Items)
{
TonyTabItem tonyTabItem = item as TonyTabItem;
if (item == null)
{
throw new Exception("非TonyTabItem");
}
//OldItem方面待后续处理，现在只能传入当前选中的Item
//if (tonyTabItem.IsSelected)
// oldSelectedItem = tonyTabItem;//获取以前被选中的Item
if (tonyTabItem != null)
{
if (tonyTabItem == this)
{
tonyTabItem.IsSelected = true;
}
else
{
tonyTabItem.IsSelected = false;
}
}
}
}
}
private static void OnSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TonyTabItem tonyTabItem = d as TonyTabItem;
//激发SelectionChanged事件,然后TabControl中处理
if (tonyTabItem.ItemSelected != null && (bool)e.NewValue)
{
tonyTabItem.ItemSelected(new SelectionChangedCancelEventArgs(tonyTabItem.oldSelectedItem, tonyTabItem));
}
}
public SelectionChangedCancelEventArgs(TonyTabItem oldItem, TonyTabItem newItem)
{
OldSelectedItem = oldItem;
NewSelectedItem = newItem;
}
private static void OnHeaderSizeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TonyTabItem tonyTabItem = d as TonyTabItem;
TonyTabControl tonyTabControl = tonyTabItem.Parent as TonyTabControl;
if (tonyTabControl == null)
{
return;
}
if (tonyTabItem.mainGrid == null)
{
return;
}
if (tonyTabItem.lbHeader == null)
{
return;
}
//处理leftMargin和HeaderHeight
List <TonyTabItem> items = new List <TonyTabItem>();
foreach (var item in tonyTabControl.Items)
{
items.Add(item as TonyTabItem);
}
//找出最大的HeaderHeight
double headerHeightMax = (from i in items select i.HeaderHeight).Max();
//都设置为最大的headerHeightMax
items.ForEach(x => x.HeaderHeight = headerHeightMax);
//处理leftMargin:TonyTabItem中的Leftmargin是Header和左边的距离，现在改为Header与Header的距离
double leftMargin = 0;
foreach (TonyTabItem item in items)
{
leftMargin += item.HeaderLeftMargin;
//item.HeaderLeftMarginEx = leftMargin;
if (item == tonyTabItem)
{
break;
}
leftMargin += item.HeaderWidth;
}
//获取LeftMargin:Header距离最左边的距离
tonyTabItem.HeaderLeftMarginEx = leftMargin;
//设置Header的Margin
tonyTabItem.lbHeader.Margin = new Thickness(leftMargin, 0, 0, 0);
//处理剪切
double left = tonyTabItem.HeaderLeftMarginEx;
double h = tonyTabItem.HeaderHeight;
double w = tonyTabItem.HeaderWidth;
double ah = tonyTabControl.ActualHeight;
double aw = tonyTabControl.ActualWidth;
//Header 有4个点，ContentPresenter有各点，按点裁剪
Point p1 = new Point(left, 0);
Point p2 = new Point(left + w, 0);
Point p3 = new Point(left + w, h);
Point p4 = new Point(aw, h);
Point p5 = new Point(aw, ah);
Point p6 = new Point(0, ah);
Point p7 = new Point(0, h);
Point p8 = new Point(left, h);
StreamGeometry geometry = new StreamGeometry();
using (StreamGeometryContext ctx = geometry.Open())
{
ctx.BeginFigure(p1, true, true);
ctx.LineTo(p2, true, true);
ctx.LineTo(p3, true, true);
ctx.LineTo(p4, true, true);
ctx.LineTo(p5, true, true);
ctx.LineTo(p6, true, true);
ctx.LineTo(p7, true, true);
ctx.LineTo(p8, true, true);
}
tonyTabItem.mainGrid.Clip = geometry;//按照Header进行裁剪
}