/// <summary>
/// 根据三角形方向设置消息框的水平位置，偏左还是偏右
/// </summary>
/// <param name="d"></param>
/// <param name="e"></param>
public static void OnDirectionPropertyChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AngleBorder angleBorder = d as AngleBorder;
if (angleBorder != null)
{
switch ((EnumPlacement)e.NewValue)
{
case EnumPlacement.LeftTop:
case EnumPlacement.LeftBottom:
case EnumPlacement.LeftCenter:
case EnumPlacement.RightTop:
case EnumPlacement.RightBottom:
case EnumPlacement.RightCenter:
angleBorder.TailWidth = 6;
angleBorder.TailHeight = 12;
break;
case EnumPlacement.TopLeft:
case EnumPlacement.TopCenter:
case EnumPlacement.TopRight:
case EnumPlacement.BottomLeft:
case EnumPlacement.BottomCenter:
case EnumPlacement.BottomRight:
angleBorder.TailWidth = 12;
angleBorder.TailHeight = 6;
break;
default:
break;
}
}
}
protected override void OnInitialized(EventArgs e)
{
base.OnInitialized(e);
this.AllowsTransparency = true;
//this.StaysOpen = false;
UIElement element = this.Child;
this.Child = null;
Grid root = new Grid()
{
Margin = new Thickness(10),
};
#region 阴影
//Border shadow = new Border()
//{
// Background = new SolidColorBrush(Color.FromRgb(255, 255, 255)),
// SnapsToDevicePixels = true,
// UseLayoutRounding = true,
// CornerRadius = new CornerRadius(3),
//};
//DropShadowEffect shadowEffect = new DropShadowEffect()
//{
// BlurRadius = 10,
// Opacity = 0.2,
// ShadowDepth = 0,
// Color = Color.FromRgb(109, 129, 154),
//};
//shadow.SetValue(Border.EffectProperty, shadowEffect);
//root.Children.Add(shadow);
#endregion
#region 设置阴影的边距，防止出现白边
//switch (this.PlacementEx)
//{
// case EnumPlacement.LeftTop:
// case EnumPlacement.LeftBottom:
// case EnumPlacement.LeftCenter:
// shadow.Margin = new Thickness(0, 0, 8, 0);
// break;
// case EnumPlacement.RightTop:
// case EnumPlacement.RightBottom:
// case EnumPlacement.RightCenter:
// shadow.Margin = new Thickness(8, 0, 0, 0);
// break;
// case EnumPlacement.TopLeft:
// case EnumPlacement.TopCenter:
// case EnumPlacement.TopRight:
// shadow.Margin = new Thickness(0, 0, 0, 8);
// break;
// case EnumPlacement.BottomLeft:
// case EnumPlacement.BottomCenter:
// case EnumPlacement.BottomRight:
// shadow.Margin = new Thickness(0, 8, 0, 0);
// break;
// default:
// break;
//}
#endregion
angleBorder = new AngleBorder()
{
Background = this.Background,
CornerRadius = this.CornerRadius,
BorderThickness = this.BorderThickness,
BorderBrush = this.BorderBrush,
};
switch (this.PlacementEx)
{
case EnumPlacement.LeftTop:
angleBorder.Placement = EnumPlacement.RightTop;
break;
case EnumPlacement.LeftBottom:
angleBorder.Placement = EnumPlacement.RightBottom;
break;
case EnumPlacement.LeftCenter:
angleBorder.Placement = EnumPlacement.RightCenter;
break;
case EnumPlacement.RightTop:
angleBorder.Placement = EnumPlacement.LeftTop;
break;
case EnumPlacement.RightBottom:
angleBorder.Placement = EnumPlacement.LeftBottom;
break;
case EnumPlacement.RightCenter:
angleBorder.Placement = EnumPlacement.LeftCenter;
break;
case EnumPlacement.TopLeft:
angleBorder.Placement = EnumPlacement.BottomLeft;
break;
case EnumPlacement.TopCenter:
angleBorder.Placement = EnumPlacement.BottomCenter;
break;
case EnumPlacement.TopRight:
angleBorder.Placement = EnumPlacement.BottomRight;
break;
case EnumPlacement.BottomLeft:
angleBorder.Placement = EnumPlacement.TopLeft;
break;
case EnumPlacement.BottomCenter:
angleBorder.Placement = EnumPlacement.TopCenter;
break;
case EnumPlacement.BottomRight:
angleBorder.Placement = EnumPlacement.TopRight;
break;
default:
break;
}
//在原有控件基础上，最外层套一个AngleBorder
angleBorder.Child = element;
root.Children.Add(angleBorder);
this.Child = root;
}