Strokes.StrokesAdded 事件

项目
10/28/2008

当一个或多个 Stroke 对象添加到 Strokes 集合时发生。

命名空间： Microsoft.Ink
程序集： Microsoft.Ink（在 Microsoft.Ink.dll 中）

语法

声明
Public Event StrokesAdded As StrokesEventHandler
用法
Dim instance As Strokes
Dim handler As StrokesEventHandler

AddHandler instance.StrokesAdded, handler

public event StrokesEventHandler StrokesAdded

public:
 event StrokesEventHandler^ StrokesAdded {
    void add (StrokesEventHandler^ value);
    void remove (StrokesEventHandler^ value);
}

/** @event */
public void add_StrokesAdded (StrokesEventHandler value)
/** @event */
public void remove_StrokesAdded (StrokesEventHandler value)

JScript 不支持事件。

备注

事件处理程序接收 StrokesEventArgs 类型的参数，该参数包含有关此事件的数据。

创建 StrokesEventHandler 委托时，需要标识处理该事件的方法。若要将该事件与事件处理程序关联，请将该委托的一个实例添加到事件中。除非移除了该委托，否则每当发生该事件时就会调用此事件处理程序。

示例

在此示例中，StrokesAdded 事件处理程序将新添加的笔画顺时针旋转 90 度。旋转围绕新添加的 Stroke 对象的边界框的中心进行。

' Reminder: To avoid a memory leak, you must explicitly call the Dispose() method 
' on any Strokes collection to which an event handler has been attached before 
' the collection goes out of scope. 
Private Sub Strokes_StrokesAdded(ByVal sender As Object, ByVal e As StrokesEventArgs)
    ' check each stroke id passed to the handler
    For Each id As Integer In e.StrokeIds
        ' find the Stroke
        For Each oneStroke As Stroke In DirectCast(sender, Strokes)
            ' when we find the added stroke, rotate it 
            If (oneStroke.Id = id) Then
                Dim bounds As Rectangle = oneStroke.GetBoundingBox()
                ' create a point at the center of bounding box
                Dim center As Point = New Point(bounds.Left + (bounds.Width / 2), bounds.Top + (bounds.Height / 2))
                ' rotate the stroke
                oneStroke.Rotate(90, center)
            End If
        Next
    Next
End Sub

// Reminder: To avoid a memory leak, you must explicitly call the Dispose() method 
// on any Strokes collection to which an event handler has been attached before 
// the collection goes out of scope. 
private void Strokes_StrokesAdded(object sender, StrokesEventArgs e)
{
    // check each stroke id passed to the handler
    foreach (int id in e.StrokeIds)
    {
        // find the Stroke
        foreach (Stroke oneStroke in (Strokes)sender)
        {
            // when we find the added stroke, rotate it 
            if (oneStroke.Id == id)
            {
                Rectangle bounds = oneStroke.GetBoundingBox();
                // create a point at the center of bounding box
                Point center = new Point(bounds.Left + (bounds.Width / 2), bounds.Top + (bounds.Height / 2));
                // rotate the stroke
                oneStroke.Rotate(90, center);
            }
        }
    }

}