InkPicture.SelectionMoved 事件

项目
11/04/2008

在当前所选内容的位置更改（例如通过修改用户界面、剪切粘贴过程或 Selection 属性进行更改）后发生。

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

语法

声明
Public Event SelectionMoved As InkOverlaySelectionMovedEventHandler
用法
Dim instance As InkPicture
Dim handler As InkOverlaySelectionMovedEventHandler

AddHandler instance.SelectionMoved, handler

public event InkOverlaySelectionMovedEventHandler SelectionMoved

public:
 event InkOverlaySelectionMovedEventHandler^ SelectionMoved {
    void add (InkOverlaySelectionMovedEventHandler^ value);
    void remove (InkOverlaySelectionMovedEventHandler^ value);
}

/** @event */
public void add_SelectionMoved (InkOverlaySelectionMovedEventHandler value)
/** @event */
public void remove_SelectionMoved (InkOverlaySelectionMovedEventHandler value)

JScript 不支持事件。

备注

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

创建 InkOverlaySelectionMovedEventHandler 委托时，需要标识将处理该事件的方法。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。出于性能方面的原因，默认事件关注处于关闭状态，但如果添加事件处理程序，它将自动打开。

若要获取已移动的 Strokes 集合的旧边框，请使用 InkOverlaySelectionMovedEventArgs 对象的 OldSelectionBoundingRect 属性。若要获取新边框，请对 InkPicture 控件的 Selection 属性中的 Strokes 集合调用 GetBoundingBox 方法。

示例

在此示例中，SelectionMoved 事件处理程序在所选内容移动之后检查该内容。如果移动了所选 Strokes 集合以使其任何部分位于窗口的左侧或顶部之外，则将所选内容移动回其原始位置。

Private Sub mInkObject_SelectionMoved(ByVal sender As Object, ByVal e As InkOverlaySelectionMovedEventArgs)
    ' mInkObject can be InkOverlay or InkPicture
    Dim newBounds As Rectangle = mInkObject.Selection.GetBoundingBox()
    ' Check if we have gone off the left or top sides of the window.
    If (newBounds.Left < 0 Or newBounds.Top < 0) Then
        ' Move to back to original spot
        mInkObject.Selection.Move(e.OldSelectionBoundingRect.Left - newBounds.Left, _
            e.OldSelectionBoundingRect.Top - newBounds.Top)
        ' Trick to insure that selection handles are updated
        mInkObject.Selection = mInkObject.Selection
    End If
End Sub

private void mInkObject_SelectionMoved(object sender, InkOverlaySelectionMovedEventArgs e)
{
    // mInkObject can be InkOverlay or InkPicture
    Rectangle newBounds = mInkObject.Selection.GetBoundingBox();

    // Check if we have gone off the left or top sides of the window.
    if (newBounds.Left < 0 || newBounds.Top < 0)
    {
        // Move to back to original spot
        mInkObject.Selection.Move(e.OldSelectionBoundingRect.Left - newBounds.Left,
            e.OldSelectionBoundingRect.Top - newBounds.Top);

        // Trick to insure that selection handles are updated
        mInkObject.Selection = mInkObject.Selection;
    }
}