InkAnalyzerBase.ActivityBase 事件
在调用 Analyze 或 BackgroundAnalyze 方法的过程中发生。
命名空间: System.Windows.Ink.AnalysisCore
程序集: IACore(在 IACore.dll 中)
语法
声明
Public Event ActivityBase As ActivityBaseEventHandler
用法
Dim instance As InkAnalyzerBase
Dim handler As ActivityBaseEventHandler
AddHandler instance.ActivityBase, handler
public event ActivityBaseEventHandler ActivityBase
public:
event ActivityBaseEventHandler^ ActivityBase {
void add (ActivityBaseEventHandler^ value);
void remove (ActivityBaseEventHandler^ value);
}
/** @event */
public void add_ActivityBase (ActivityBaseEventHandler value)
/** @event */
public void remove_ActivityBase (ActivityBaseEventHandler value)
JScript 不支持事件。
备注
此事件指示墨迹分析器正在执行墨迹分析。此事件不指示墨迹分析器在此任务中的进度。
请在以下情况下处理此事件。
向用户指示活动。
在同步分析过程中处理用户输入。
接收系统请求的通知,如重新绘制应用程序的窗口。
在墨迹分析的布局分析阶段以及书写和绘制分类阶段中,墨迹分析器常常引发此事件。在手写识别阶段中,墨迹分析器在访问墨迹识别器之前和之后引发此事件。
墨迹分析器生成的活动事件数受以下因素影响。
墨迹分析器应用于墨迹识别的墨迹识别器。
墨迹分析器正在分析的笔画的数量和长度。
分类为书写的笔画数。
有关将应用程序数据与 InkAnalyzerBase 同步的更多信息,请参见Data Proxy with Ink Analysis。
示例
此示例为墨迹分析器的 ActivityBase 事件定义事件处理程序。如果应当取消分析操作,则该事件处理程序对生成该事件的 InkAnalyzerBase 调用 Abort,并更新分析器的 DirtyRegion 属性。
''' <summary>
''' The ink analyzer's Activity event handler.
''' </summary>
''' <param name="sender">The source of the event.</param>
''' <param name="e">The event data.</param>
Sub theInkAnalyzerBase_Activity(ByVal sender As Object, ByVal e As EventArgs)
Dim abortAnalysis As Boolean = False
' Check if the analysis operation should be canceled.
' Abort analysis if the flag to do so is set.
If abortAnalysis Then
' Get the analyzer that raised the Activity event.
Dim theInkAnalyzerBase As System.Windows.Ink.AnalysisCore.InkAnalyzerBase = _
DirectCast(sender, System.Windows.Ink.AnalysisCore.InkAnalyzerBase)
' Abort the analysis and get the region that was being analyzed.
Dim theAnalysisRegionBase As System.Windows.Ink.AnalysisCore.AnalysisRegionBase = _
theInkAnalyzerBase.Abort()
' Add the region that was being analyzed to the analyzer's dirty region.
theInkAnalyzerBase.DirtyRegion.Union(theAnalysisRegionBase)
End If
End Sub 'theInkAnalyzerBase_Activity
/// <summary>
/// The ink analyzer's Activity event handler.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event data.</param>
void theInkAnalyzerBase_Activity(object sender, EventArgs e)
{
bool abortAnalysis = false;
// Check if the analysis operation should be canceled.
// Abort analysis if the flag to do so is set.
if (abortAnalysis)
{
// Get the analyzer that raised the Activity event.
System.Windows.Ink.AnalysisCore.InkAnalyzerBase theInkAnalyzerBase =
sender as System.Windows.Ink.AnalysisCore.InkAnalyzerBase;
// Abort the analysis and get the region that was being analyzed.
System.Windows.Ink.AnalysisCore.AnalysisRegionBase theAnalysisRegionBase =
theInkAnalyzerBase.Abort();
// Add the region that was being analyzed to the analyzer's dirty region.
theInkAnalyzerBase.DirtyRegion.Union(theAnalysisRegionBase);
}
}
平台
Windows Vista, Windows XP SP2, Windows Server 2003
.NET Framework 和 .NET Compact Framework 并不是对每个平台的所有版本都提供支持。有关支持的版本的列表,请参见.NET Framework 系统要求。
版本信息
.NET Framework
受以下版本支持:3.0